15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/render_text.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <algorithm> 80f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)#include <climits> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "base/command_line.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/i18n/break_iterator.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/stl_util.h" 14116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch#include "base/strings/string_util.h" 155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "base/strings/utf_string_conversions.h" 16ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch#include "third_party/icu/source/common/unicode/rbbi.h" 17ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch#include "third_party/icu/source/common/unicode/utf16.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "third_party/skia/include/core/SkTypeface.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "third_party/skia/include/effects/SkGradientShader.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/canvas.h" 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/insets.h" 22cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "ui/gfx/render_text_harfbuzz.h" 23cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "ui/gfx/scoped_canvas.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/skia_util.h" 25cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "ui/gfx/switches.h" 2658537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles)#include "ui/gfx/text_elider.h" 275d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "ui/gfx/text_utils.h" 28d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)#include "ui/gfx/utf16_indexing.h" 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace gfx { 312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// All chars are replaced by this char when the password style is set. 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(benrg): GTK uses the first of U+25CF, U+2022, U+2731, U+273A, '*' 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// that's available in the font (find_invisible_char() in gtkentry.c). 37a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)const base::char16 kPasswordReplacementChar = '*'; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Default color used for the text and cursor. 402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const SkColor kDefaultColor = SK_ColorBLACK; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Default color used for drawing selection background. 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const SkColor kDefaultSelectionBackgroundColor = SK_ColorGRAY; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Fraction of the text size to lower a strike through below the baseline. 462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const SkScalar kStrikeThroughOffset = (-SK_Scalar1 * 6 / 21); 472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Fraction of the text size to lower an underline below the baseline. 482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const SkScalar kUnderlineOffset = (SK_Scalar1 / 9); 492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Fraction of the text size to use for a strike through or under-line. 502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const SkScalar kLineThickness = (SK_Scalar1 / 18); 512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Fraction of the text size to use for a top margin of a diagonal strike. 522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const SkScalar kDiagonalStrikeMarginOffset = (SK_Scalar1 / 4); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 540f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)// Invalid value of baseline. Assigning this value to |baseline_| causes 550f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)// re-calculation of baseline. 560f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)const int kInvalidBaseline = INT_MAX; 570f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) 580f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)// Returns the baseline, with which the text best appears vertically centered. 590f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)int DetermineBaselineCenteringText(const Rect& display_rect, 600f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const FontList& font_list) { 610f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const int display_height = display_rect.height(); 620f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const int font_height = font_list.GetHeight(); 630f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) // Lower and upper bound of baseline shift as we try to show as much area of 640f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) // text as possible. In particular case of |display_height| == |font_height|, 650f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) // we do not want to shift the baseline. 660f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const int min_shift = std::min(0, display_height - font_height); 670f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const int max_shift = std::abs(display_height - font_height); 680f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const int baseline = font_list.GetBaseline(); 690f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const int cap_height = font_list.GetCapHeight(); 700f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) const int internal_leading = baseline - cap_height; 71f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Some platforms don't support getting the cap height, and simply return 72f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // the entire font ascent from GetCapHeight(). Centering the ascent makes 73f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // the font look too low, so if GetCapHeight() returns the ascent, center 74f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // the entire font height instead. 75f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) const int space = 76f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) display_height - ((internal_leading != 0) ? cap_height : font_height); 77f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) const int baseline_shift = space / 2 - internal_leading; 780f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) return baseline + std::max(min_shift, std::min(max_shift, baseline_shift)); 790f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)} 800f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) 8146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles)// Converts |Font::FontStyle| flags to |SkTypeface::Style| flags. 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SkTypeface::Style ConvertFontStyleToSkiaTypefaceStyle(int font_style) { 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int skia_style = SkTypeface::kNormal; 8446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) skia_style |= (font_style & Font::BOLD) ? SkTypeface::kBold : 0; 8546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) skia_style |= (font_style & Font::ITALIC) ? SkTypeface::kItalic : 0; 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast<SkTypeface::Style>(skia_style); 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Given |font| and |display_width|, returns the width of the fade gradient. 905d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)int CalculateFadeGradientWidth(const FontList& font_list, int display_width) { 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Fade in/out about 2.5 characters of the beginning/end of the string. 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The .5 here is helpful if one of the characters is a space. 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Use a quarter of the display width if the display width is very short. 945d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const int average_character_width = font_list.GetExpectedTextWidth(1); 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const double gradient_width = std::min(average_character_width * 2.5, 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) display_width / 4.0); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_GE(gradient_width, 0.0); 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast<int>(floor(gradient_width + 0.5)); 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Appends to |positions| and |colors| values corresponding to the fade over 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// |fade_rect| from color |c0| to color |c1|. 1032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AddFadeEffect(const Rect& text_rect, 1042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const Rect& fade_rect, 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SkColor c0, 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SkColor c1, 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::vector<SkScalar>* positions, 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::vector<SkColor>* colors) { 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const SkScalar left = static_cast<SkScalar>(fade_rect.x() - text_rect.x()); 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const SkScalar width = static_cast<SkScalar>(fade_rect.width()); 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const SkScalar p0 = left / text_rect.width(); 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const SkScalar p1 = (left + width) / text_rect.width(); 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Prepend 0.0 to |positions|, as required by Skia. 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (positions->empty() && p0 != 0.0) { 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) positions->push_back(0.0); 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) colors->push_back(c0); 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) positions->push_back(p0); 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) colors->push_back(c0); 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) positions->push_back(p1); 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) colors->push_back(c1); 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Creates a SkShader to fade the text, with |left_part| specifying the left 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// fade effect, if any, and |right_part| specifying the right fade effect. 1262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)skia::RefPtr<SkShader> CreateFadeShader(const Rect& text_rect, 1272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const Rect& left_part, 1282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const Rect& right_part, 1292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SkColor color) { 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Fade alpha of 51/255 corresponds to a fade of 0.2 of the original color. 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const SkColor fade_color = SkColorSetA(color, 51); 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::vector<SkScalar> positions; 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::vector<SkColor> colors; 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!left_part.IsEmpty()) 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AddFadeEffect(text_rect, left_part, fade_color, color, 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &positions, &colors); 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!right_part.IsEmpty()) 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AddFadeEffect(text_rect, right_part, color, fade_color, 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &positions, &colors); 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!positions.empty()); 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Terminate |positions| with 1.0, as required by Skia. 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (positions.back() != 1.0) { 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) positions.push_back(1.0); 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) colors.push_back(colors.back()); 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SkPoint points[2]; 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) points[0].iset(text_rect.x(), text_rect.y()); 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) points[1].iset(text_rect.right(), text_rect.y()); 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return skia::AdoptRef( 1542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SkGradientShader::CreateLinear(&points[0], &colors[0], &positions[0], 1552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) colors.size(), SkShader::kClamp_TileMode)); 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 158116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch// Converts a FontRenderParams::Hinting value to the corresponding 159116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch// SkPaint::Hinting value. 160116680a4aac90f2aa7413d9095a592090648e557Ben MurdochSkPaint::Hinting FontRenderParamsHintingToSkPaintHinting( 161116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch FontRenderParams::Hinting params_hinting) { 162116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch switch (params_hinting) { 163116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch case FontRenderParams::HINTING_NONE: return SkPaint::kNo_Hinting; 164116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch case FontRenderParams::HINTING_SLIGHT: return SkPaint::kSlight_Hinting; 165116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch case FontRenderParams::HINTING_MEDIUM: return SkPaint::kNormal_Hinting; 166116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch case FontRenderParams::HINTING_FULL: return SkPaint::kFull_Hinting; 167116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch } 168116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch return SkPaint::kNo_Hinting; 169116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch} 170116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace internal { 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Value of |underline_thickness_| that indicates that underline metrics have 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// not been set explicitly. 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const SkScalar kUnderlineMetricsNotSet = -1.0f; 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SkiaTextRenderer::SkiaTextRenderer(Canvas* canvas) 180effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch : canvas_(canvas), 181effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch canvas_skia_(canvas->sk_canvas()), 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) underline_thickness_(kUnderlineMetricsNotSet), 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) underline_position_(0.0f) { 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(canvas_skia_); 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setTextEncoding(SkPaint::kGlyphID_TextEncoding); 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setStyle(SkPaint::kFill_Style); 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setAntiAlias(true); 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setSubpixelText(true); 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setLCDRenderText(true); 1905d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) paint_.setHinting(SkPaint::kNormal_Hinting); 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SkiaTextRenderer::~SkiaTextRenderer() { 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SkiaTextRenderer::SetDrawLooper(SkDrawLooper* draw_looper) { 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setLooper(draw_looper); 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 200116680a4aac90f2aa7413d9095a592090648e557Ben Murdochvoid SkiaTextRenderer::SetFontRenderParams(const FontRenderParams& params, 201116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch bool background_is_transparent) { 2021320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ApplyRenderParams(params, background_is_transparent, &paint_); 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SkiaTextRenderer::SetTypeface(SkTypeface* typeface) { 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setTypeface(typeface); 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SkiaTextRenderer::SetTextSize(SkScalar size) { 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setTextSize(size); 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SkiaTextRenderer::SetFontFamilyWithStyle(const std::string& family, 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int style) { 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!family.empty()); 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 217cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) skia::RefPtr<SkTypeface> typeface = CreateSkiaTypeface(family.c_str(), style); 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (typeface) { 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // |paint_| adds its own ref. So don't |release()| it from the ref ptr here. 2202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SetTypeface(typeface.get()); 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Enable fake bold text if bold style is needed but new typeface does not 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // have it. 22446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) paint_.setFakeBoldText((style & Font::BOLD) && !typeface->isBold()); 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SkiaTextRenderer::SetForegroundColor(SkColor foreground) { 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setColor(foreground); 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2321320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tuccivoid SkiaTextRenderer::SetShader(SkShader* shader) { 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) paint_.setShader(shader); 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SkiaTextRenderer::SetUnderlineMetrics(SkScalar thickness, 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SkScalar position) { 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) underline_thickness_ = thickness; 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) underline_position_ = position; 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SkiaTextRenderer::DrawPosText(const SkPoint* pos, 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint16* glyphs, 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t glyph_count) { 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const size_t byte_length = glyph_count * sizeof(glyphs[0]); 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) canvas_skia_->drawPosText(&glyphs[0], byte_length, &pos[0], paint_); 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void SkiaTextRenderer::DrawDecorations(int x, int y, int width, bool underline, 2502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool strike, bool diagonal_strike) { 2512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (underline) 2522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DrawUnderline(x, y, width); 2532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (strike) 2542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DrawStrike(x, y, width); 255effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (diagonal_strike) { 256effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (!diagonal_) 257effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch diagonal_.reset(new DiagonalStrike(canvas_, Point(x, y), paint_)); 258effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch diagonal_->AddPiece(width, paint_.getColor()); 259effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } else if (diagonal_) { 260effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch EndDiagonalStrike(); 261effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 262effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch} 263effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 264effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochvoid SkiaTextRenderer::EndDiagonalStrike() { 265effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (diagonal_) { 266effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch diagonal_->Draw(); 267effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch diagonal_.reset(); 268effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 2692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void SkiaTextRenderer::DrawUnderline(int x, int y, int width) { 2722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SkRect r = SkRect::MakeLTRB(x, y + underline_position_, x + width, 2732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) y + underline_position_ + underline_thickness_); 2742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (underline_thickness_ == kUnderlineMetricsNotSet) { 2752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const SkScalar text_size = paint_.getTextSize(); 2762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) r.fTop = SkScalarMulAdd(text_size, kUnderlineOffset, y); 2772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) r.fBottom = r.fTop + SkScalarMul(text_size, kLineThickness); 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) canvas_skia_->drawRect(r, paint_); 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void SkiaTextRenderer::DrawStrike(int x, int y, int width) const { 2832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const SkScalar text_size = paint_.getTextSize(); 2842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const SkScalar height = SkScalarMul(text_size, kLineThickness); 2852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const SkScalar offset = SkScalarMulAdd(text_size, kStrikeThroughOffset, y); 2862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const SkRect r = SkRect::MakeLTRB(x, offset, x + width, offset + height); 2872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) canvas_skia_->drawRect(r, paint_); 2882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 290effb81e5f8246d0db0270817048dc992db66e9fbBen MurdochSkiaTextRenderer::DiagonalStrike::DiagonalStrike(Canvas* canvas, 291effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch Point start, 292effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch const SkPaint& paint) 293effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch : canvas_(canvas), 294effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch start_(start), 295effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch paint_(paint), 296effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch total_length_(0) { 297effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch} 298effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 299effb81e5f8246d0db0270817048dc992db66e9fbBen MurdochSkiaTextRenderer::DiagonalStrike::~DiagonalStrike() { 300effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch} 301effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 302effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochvoid SkiaTextRenderer::DiagonalStrike::AddPiece(int length, SkColor color) { 303effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch pieces_.push_back(Piece(length, color)); 304effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch total_length_ += length; 305effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch} 306effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 307effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochvoid SkiaTextRenderer::DiagonalStrike::Draw() { 3082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const SkScalar text_size = paint_.getTextSize(); 3092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const SkScalar offset = SkScalarMul(text_size, kDiagonalStrikeMarginOffset); 310effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch const int thickness = 311effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch SkScalarCeilToInt(SkScalarMul(text_size, kLineThickness) * 2); 312effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch const int height = SkScalarCeilToInt(text_size - offset); 313effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch const Point end = start_ + Vector2d(total_length_, -height); 314cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const int clip_height = height + 2 * thickness; 315effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 316effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch paint_.setAntiAlias(true); 317effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch paint_.setStrokeWidth(thickness); 3182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 319effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch const bool clipped = pieces_.size() > 1; 320116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch SkCanvas* sk_canvas = canvas_->sk_canvas(); 321effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch int x = start_.x(); 322116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 323effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch for (size_t i = 0; i < pieces_.size(); ++i) { 324effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch paint_.setColor(pieces_[i].second); 325effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 326effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (clipped) { 327116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch canvas_->Save(); 328cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) sk_canvas->clipRect(RectToSkRect( 329116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch Rect(x, end.y() - thickness, pieces_[i].first, clip_height))); 330effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 331effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 332effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch canvas_->DrawLine(start_, end, paint_); 333effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 334116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (clipped) 335116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch canvas_->Restore(); 336116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 337effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch x += pieces_[i].first; 338effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 3392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)StyleIterator::StyleIterator(const BreakList<SkColor>& colors, 3422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const std::vector<BreakList<bool> >& styles) 3432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : colors_(colors), 3442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) styles_(styles) { 3452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) color_ = colors_.breaks().begin(); 3462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (size_t i = 0; i < styles_.size(); ++i) 3472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) style_.push_back(styles_[i].breaks().begin()); 3482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)StyleIterator::~StyleIterator() {} 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 352d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)Range StyleIterator::GetRange() const { 353d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) Range range(colors_.GetRange(color_)); 3542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (size_t i = 0; i < NUM_TEXT_STYLES; ++i) 3552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) range = range.Intersect(styles_[i].GetRange(style_[i])); 3562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return range; 3575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void StyleIterator::UpdatePosition(size_t position) { 3602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) color_ = colors_.GetBreak(position); 3612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (size_t i = 0; i < NUM_TEXT_STYLES; ++i) 3622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) style_[i] = styles_[i].GetBreak(position); 3632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 365d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)LineSegment::LineSegment() : run(0) {} 366d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 367d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)LineSegment::~LineSegment() {} 368d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 369d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)Line::Line() : preceding_heights(0), baseline(0) {} 370d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 371d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)Line::~Line() {} 372d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 373cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)skia::RefPtr<SkTypeface> CreateSkiaTypeface(const std::string& family, 374cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) int style) { 375cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) SkTypeface::Style skia_style = ConvertFontStyleToSkiaTypefaceStyle(style); 376cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return skia::AdoptRef(SkTypeface::CreateFromName(family.c_str(), skia_style)); 377cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 378cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 3791320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tuccivoid ApplyRenderParams(const FontRenderParams& params, 3801320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci bool background_is_transparent, 3811320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci SkPaint* paint) { 3821320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci paint->setAntiAlias(params.antialiasing); 3831320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci paint->setLCDRenderText(!background_is_transparent && 3841320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci params.subpixel_rendering != FontRenderParams::SUBPIXEL_RENDERING_NONE); 3851320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci paint->setSubpixelText(params.subpixel_positioning); 3861320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci paint->setAutohinted(params.autohinter); 3871320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci paint->setHinting(FontRenderParamsHintingToSkPaintHinting(params.hinting)); 3881320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci} 3891320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 3902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} // namespace internal 3912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)RenderText::~RenderText() { 3935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)RenderText* RenderText::CreateInstance() { 396f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#if defined(OS_MACOSX) && defined(TOOLKIT_VIEWS) 397f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Use the more complete HarfBuzz implementation for Views controls on Mac. 398f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return new RenderTextHarfBuzz; 399f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#else 400cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (CommandLine::ForCurrentProcess()->HasSwitch( 401cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) switches::kEnableHarfBuzzRenderText)) { 402cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return new RenderTextHarfBuzz; 403cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 404cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return CreateNativeInstance(); 405f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#endif 406cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 407cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 408868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)void RenderText::SetText(const base::string16& text) { 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!composition_range_.IsValid()); 410d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) if (text_ == text) 411d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return; 4125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) text_ = text; 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Adjust ranged styles and colors to accommodate a new text length. 4151320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // Clear style ranges as they might break new text graphemes and apply 4161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // the first style to the whole text instead. 4172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const size_t text_length = text_.length(); 4182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) colors_.SetMax(text_length); 4191320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci for (size_t style = 0; style < NUM_TEXT_STYLES; ++style) { 4201320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci BreakList<bool>& break_list = styles_[style]; 4211320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci break_list.SetValue(break_list.breaks().begin()->second); 4221320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci break_list.SetMax(text_length); 4231320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 4255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Reset selection model. SetText should always followed by SetSelectionModel 4275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // or SetCursorPosition in upper layer. 4285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SetSelectionModel(SelectionModel()); 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Invalidate the cached text direction if it depends on the text contents. 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (directionality_mode_ == DIRECTIONALITY_FROM_TEXT) 4325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) text_direction_ = base::i18n::UNKNOWN_DIRECTION; 4335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 434868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) obscured_reveal_index_ = -1; 435eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch UpdateLayoutText(); 4365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SetHorizontalAlignment(HorizontalAlignment alignment) { 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (horizontal_alignment_ != alignment) { 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) horizontal_alignment_ = alignment; 4415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) display_offset_ = Vector2d(); 4425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 4435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SetFontList(const FontList& font_list) { 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) font_list_ = font_list; 4485f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) const int font_style = font_list.GetFontStyle(); 4495f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) SetStyle(BOLD, (font_style & gfx::Font::BOLD) != 0); 4505f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) SetStyle(ITALIC, (font_style & gfx::Font::ITALIC) != 0); 4515f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) SetStyle(UNDERLINE, (font_style & gfx::Font::UNDERLINE) != 0); 4520f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) baseline_ = kInvalidBaseline; 4535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 4545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ResetLayout(); 4555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SetCursorEnabled(bool cursor_enabled) { 4585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cursor_enabled_ = cursor_enabled; 4595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 4605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::ToggleInsertMode() { 4635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) insert_mode_ = !insert_mode_; 4645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 4655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SetObscured(bool obscured) { 4685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (obscured != obscured_) { 4695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) obscured_ = obscured; 470868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) obscured_reveal_index_ = -1; 4715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 472eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch UpdateLayoutText(); 4735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 476868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)void RenderText::SetObscuredRevealIndex(int index) { 477868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) if (obscured_reveal_index_ == index) 478868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) return; 479868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 480868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) obscured_reveal_index_ = index; 481868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 482eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch UpdateLayoutText(); 483868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)} 484868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 4855f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles)void RenderText::SetReplaceNewlineCharsWithSymbols(bool replace) { 4865f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) replace_newline_chars_with_symbols_ = replace; 4875f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) cached_bounds_and_offset_valid_ = false; 4885f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) UpdateLayoutText(); 4895f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles)} 4905f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) 491d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)void RenderText::SetMultiline(bool multiline) { 492d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) if (multiline != multiline_) { 493d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) multiline_ = multiline; 494d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) cached_bounds_and_offset_valid_ = false; 495d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) lines_.clear(); 496d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) } 497d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)} 498d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 4995d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)void RenderText::SetElideBehavior(ElideBehavior elide_behavior) { 5005d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // TODO(skanuj) : Add a test for triggering layout change. 5015d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) if (elide_behavior_ != elide_behavior) { 5025d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) elide_behavior_ = elide_behavior; 5035d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) UpdateLayoutText(); 5045d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 5055d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 5065d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 5075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SetDisplayRect(const Rect& r) { 5085d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) if (r != display_rect_) { 5095d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) display_rect_ = r; 5105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) baseline_ = kInvalidBaseline; 5115d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 5125d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) lines_.clear(); 513116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (elide_behavior_ != NO_ELIDE) 5145d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) UpdateLayoutText(); 5155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 5165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SetCursorPosition(size_t position) { 5195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MoveCursorTo(position, false); 5205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::MoveCursor(BreakType break_type, 5235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VisualCursorDirection direction, 5245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool select) { 525010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) SelectionModel cursor(cursor_position(), selection_model_.caret_affinity()); 5265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Cancelling a selection moves to the edge of the selection. 5275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (break_type != LINE_BREAK && !selection().is_empty() && !select) { 5285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SelectionModel selection_start = GetSelectionModelForSelectionStart(); 5295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int start_x = GetCursorBounds(selection_start, true).x(); 530010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) int cursor_x = GetCursorBounds(cursor, true).x(); 5315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Use the selection start if it is left (when |direction| is CURSOR_LEFT) 5325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // or right (when |direction| is CURSOR_RIGHT) of the selection end. 5335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (direction == CURSOR_RIGHT ? start_x > cursor_x : start_x < cursor_x) 534010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) cursor = selection_start; 535010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // Use the nearest word boundary in the proper |direction| for word breaks. 5365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (break_type == WORD_BREAK) 537010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) cursor = GetAdjacentSelectionModel(cursor, break_type, direction); 538010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // Use an adjacent selection model if the cursor is not at a valid position. 539010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (!IsValidCursorIndex(cursor.caret_pos())) 540010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) cursor = GetAdjacentSelectionModel(cursor, CHARACTER_BREAK, direction); 5415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 542010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) cursor = GetAdjacentSelectionModel(cursor, break_type, direction); 5435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (select) 545010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) cursor.set_selection_start(selection().start()); 546010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) MoveCursorTo(cursor); 5475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool RenderText::MoveCursorTo(const SelectionModel& model) { 5505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Enforce valid selection model components. 5515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t text_length = text().length(); 552d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) Range range(std::min(model.selection().start(), text_length), 553d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) std::min(model.caret_pos(), text_length)); 554010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // The current model only supports caret positions at valid cursor indices. 555010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (!IsValidCursorIndex(range.start()) || !IsValidCursorIndex(range.end())) 5565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SelectionModel sel(range, model.caret_affinity()); 5585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool changed = sel != selection_model_; 5595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SetSelectionModel(sel); 5605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return changed; 5615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 563d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)bool RenderText::SelectRange(const Range& range) { 564d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) Range sel(std::min(range.start(), text().length()), 565d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) std::min(range.end(), text().length())); 566010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // Allow selection bounds at valid indicies amid multi-character graphemes. 567010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (!IsValidLogicalIndex(sel.start()) || !IsValidLogicalIndex(sel.end())) 5685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogicalCursorDirection affinity = 5705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (sel.is_reversed() || sel.is_empty()) ? CURSOR_FORWARD : CURSOR_BACKWARD; 5715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SetSelectionModel(SelectionModel(sel, affinity)); 5725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 5735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool RenderText::IsPointInSelection(const Point& point) { 5765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (selection().is_empty()) 5775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 5785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SelectionModel cursor = FindCursorPosition(point); 5795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return RangeContainsCaret( 5805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) selection(), cursor.caret_pos(), cursor.caret_affinity()); 5815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::ClearSelection() { 5845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SetSelectionModel(SelectionModel(cursor_position(), 5855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) selection_model_.caret_affinity())); 5865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SelectAll(bool reversed) { 5895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const size_t length = text().length(); 590d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const Range all = reversed ? Range(length, 0) : Range(0, length); 5915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const bool success = SelectRange(all); 5925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(success); 5935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SelectWord() { 5965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (obscured_) { 5975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SelectAll(false); 5985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 5995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 601a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) size_t selection_max = selection().GetMax(); 6025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::i18n::BreakIterator iter(text(), base::i18n::BreakIterator::BREAK_WORD); 6045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool success = iter.Init(); 6055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(success); 6065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!success) 6075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 6085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 609a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) size_t selection_min = selection().GetMin(); 610a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) if (selection_min == text().length() && selection_min != 0) 611a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) --selection_min; 612c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 613a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) for (; selection_min != 0; --selection_min) { 614a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) if (iter.IsStartOfWord(selection_min) || 615a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) iter.IsEndOfWord(selection_min)) 6165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 6175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 619a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) if (selection_min == selection_max && selection_max != text().length()) 620a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) ++selection_max; 6215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 622a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) for (; selection_max < text().length(); ++selection_max) 623a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) if (iter.IsEndOfWord(selection_max) || iter.IsStartOfWord(selection_max)) 6245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 6255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 626a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) const bool reversed = selection().is_reversed(); 627a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) MoveCursorTo(reversed ? selection_max : selection_min, false); 628a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) MoveCursorTo(reversed ? selection_min : selection_max, true); 6295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 631d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)const Range& RenderText::GetCompositionRange() const { 6325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return composition_range_; 6335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 635d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)void RenderText::SetCompositionRange(const Range& composition_range) { 6365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(!composition_range.IsValid() || 637d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) Range(0, text_.length()).Contains(composition_range)); 6385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) composition_range_.set_end(composition_range.end()); 6395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) composition_range_.set_start(composition_range.start()); 6405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ResetLayout(); 6415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void RenderText::SetColor(SkColor value) { 6442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) colors_.SetValue(value); 6455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 647d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)void RenderText::ApplyColor(SkColor value, const Range& range) { 6482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) colors_.ApplyValue(value, range); 6492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 6502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 6512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void RenderText::SetStyle(TextStyle style, bool value) { 6522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) styles_[style].SetValue(value); 6532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 6541320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci cached_bounds_and_offset_valid_ = false; 6551320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ResetLayout(); 6562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 6572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 658d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)void RenderText::ApplyStyle(TextStyle style, bool value, const Range& range) { 6591320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // Do not change styles mid-grapheme to avoid breaking ligatures. 6601320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci const size_t start = IsValidCursorIndex(range.start()) ? range.start() : 6611320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci IndexOfAdjacentGrapheme(range.start(), CURSOR_BACKWARD); 6621320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci const size_t end = IsValidCursorIndex(range.end()) ? range.end() : 6631320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci IndexOfAdjacentGrapheme(range.end(), CURSOR_FORWARD); 6641320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci styles_[style].ApplyValue(value, Range(start, end)); 6652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 6661320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci cached_bounds_and_offset_valid_ = false; 6671320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ResetLayout(); 6685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6707d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles)bool RenderText::GetStyle(TextStyle style) const { 6717d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) return (styles_[style].breaks().size() == 1) && 6727d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) styles_[style].breaks().front().second; 6737d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles)} 6747d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) 6755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SetDirectionalityMode(DirectionalityMode mode) { 6765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (mode == directionality_mode_) 6775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 6785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) directionality_mode_ = mode; 6805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) text_direction_ = base::i18n::UNKNOWN_DIRECTION; 681f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) cached_bounds_and_offset_valid_ = false; 6825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ResetLayout(); 6835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::i18n::TextDirection RenderText::GetTextDirection() { 6865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (text_direction_ == base::i18n::UNKNOWN_DIRECTION) { 6875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (directionality_mode_) { 6885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case DIRECTIONALITY_FROM_TEXT: 6895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Derive the direction from the display text, which differs from text() 6905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // in the case of obscured (password) textfields. 6915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) text_direction_ = 6925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::i18n::GetFirstStrongCharacterDirection(GetLayoutText()); 6935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 6945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case DIRECTIONALITY_FROM_UI: 6955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) text_direction_ = base::i18n::IsRTL() ? base::i18n::RIGHT_TO_LEFT : 6965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::i18n::LEFT_TO_RIGHT; 6975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 6985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case DIRECTIONALITY_FORCE_LTR: 6995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) text_direction_ = base::i18n::LEFT_TO_RIGHT; 7005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 7015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case DIRECTIONALITY_FORCE_RTL: 7025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) text_direction_ = base::i18n::RIGHT_TO_LEFT; 7035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 7045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 7055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED(); 7065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return text_direction_; 7105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)VisualCursorDirection RenderText::GetVisualDirectionOfLogicalEnd() { 7135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return GetTextDirection() == base::i18n::LEFT_TO_RIGHT ? 7145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CURSOR_RIGHT : CURSOR_LEFT; 7155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7174e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)SizeF RenderText::GetStringSizeF() { 7184e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) const Size size = GetStringSize(); 7194e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) return SizeF(size.width(), size.height()); 7204e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)} 7214e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) 722116680a4aac90f2aa7413d9095a592090648e557Ben Murdochfloat RenderText::GetContentWidth() { 723116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch return GetStringSizeF().width() + (cursor_enabled_ ? 1 : 0); 724c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 725c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 7260f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)int RenderText::GetBaseline() { 7270f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) if (baseline_ == kInvalidBaseline) 7280f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) baseline_ = DetermineBaselineCenteringText(display_rect(), font_list()); 7290f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) DCHECK_NE(kInvalidBaseline, baseline_); 7300f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) return baseline_; 7310f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles)} 7320f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) 7335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::Draw(Canvas* canvas) { 7345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) EnsureLayout(); 7355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (clip_to_display_rect()) { 7372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Rect clip_rect(display_rect()); 738f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) clip_rect.Inset(ShadowValue::GetMargin(shadows_)); 7395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) canvas->Save(); 7415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) canvas->ClipRect(clip_rect); 7425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 744eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch if (!text().empty() && focused()) 7455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DrawSelection(canvas); 7465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 747c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (cursor_enabled() && cursor_visible() && focused()) 748c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DrawCursor(canvas, selection_model_); 7495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!text().empty()) 7515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DrawVisualText(canvas); 7525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (clip_to_display_rect()) 7545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) canvas->Restore(); 7555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 757c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)void RenderText::DrawCursor(Canvas* canvas, const SelectionModel& position) { 758c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // Paint cursor. Replace cursor is drawn as rectangle for now. 759c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // TODO(msw): Draw a better cursor with a better indication of association. 760c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) canvas->FillRect(GetCursorBounds(position, true), cursor_color_); 761c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 762c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 763010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)bool RenderText::IsValidLogicalIndex(size_t index) { 764010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // Check that the index is at a valid code point (not mid-surrgate-pair) and 765010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // that it's not truncated from the layout text (its glyph may be shown). 766010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // 767010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // Indices within truncated text are disallowed so users can easily interact 768010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // with the underlying truncated text using the ellipsis as a proxy. This lets 769010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // users select all text, select the truncated text, and transition from the 770010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // last rendered glyph to the end of the text without getting invisible cursor 771010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // positions nor needing unbounded arrow key presses to traverse the ellipsis. 772010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) return index == 0 || index == text().length() || 773010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) (index < text().length() && 774010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) (truncate_length_ == 0 || index < truncate_length_) && 775010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) IsValidCodePointIndex(text(), index)); 776010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)} 777010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 7785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Rect RenderText::GetCursorBounds(const SelectionModel& caret, 7795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool insert_mode) { 780d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // TODO(ckocagil): Support multiline. This function should return the height 781d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // of the line the cursor is on. |GetStringSize()| now returns 782d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // the multiline size, eliminate its use here. 783d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 7845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) EnsureLayout(); 7855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t caret_pos = caret.caret_pos(); 786010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) DCHECK(IsValidLogicalIndex(caret_pos)); 7875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In overtype mode, ignore the affinity and always indicate that we will 7885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // overtype the next character. 7895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogicalCursorDirection caret_affinity = 7905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) insert_mode ? caret.caret_affinity() : CURSOR_FORWARD; 79190dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) int x = 0, width = 1; 79290dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) Size size = GetStringSize(); 7935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (caret_pos == (caret_affinity == CURSOR_BACKWARD ? 0 : text().length())) { 7942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // The caret is attached to the boundary. Always return a 1-dip width caret, 7955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // since there is nothing to overtype. 7965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((GetTextDirection() == base::i18n::RIGHT_TO_LEFT) == (caret_pos == 0)) 7975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) x = size.width(); 7985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 7995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t grapheme_start = (caret_affinity == CURSOR_FORWARD) ? 8005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) caret_pos : IndexOfAdjacentGrapheme(caret_pos, CURSOR_BACKWARD); 801d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) Range xspan(GetGlyphBounds(grapheme_start)); 8025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (insert_mode) { 8035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) x = (caret_affinity == CURSOR_BACKWARD) ? xspan.end() : xspan.start(); 8045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { // overtype mode 8055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) x = xspan.GetMin(); 8065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) width = xspan.length(); 8075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 80990dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) return Rect(ToViewPoint(Point(x, 0)), Size(width, size.height())); 8105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const Rect& RenderText::GetUpdatedCursorBounds() { 8135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UpdateCachedBoundsAndOffset(); 8145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return cursor_bounds_; 8155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t RenderText::IndexOfAdjacentGrapheme(size_t index, 818eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LogicalCursorDirection direction) { 8195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (index > text().length()) 8205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return text().length(); 8215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) EnsureLayout(); 8235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (direction == CURSOR_FORWARD) { 8255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (index < text().length()) { 8265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) index++; 827010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (IsValidCursorIndex(index)) 8285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return index; 8295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return text().length(); 8315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (index > 0) { 8345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) index--; 835010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (IsValidCursorIndex(index)) 8365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return index; 8375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 8395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SelectionModel RenderText::GetSelectionModelForSelectionStart() { 842d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const Range& sel = selection(); 8435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (sel.is_empty()) 8445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return selection_model_; 8455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SelectionModel(sel.start(), 8465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sel.is_reversed() ? CURSOR_BACKWARD : CURSOR_FORWARD); 8475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 849116680a4aac90f2aa7413d9095a592090648e557Ben Murdochconst Vector2d& RenderText::GetUpdatedDisplayOffset() { 850116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch UpdateCachedBoundsAndOffset(); 851116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch return display_offset_; 852116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch} 853116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 854116680a4aac90f2aa7413d9095a592090648e557Ben Murdochvoid RenderText::SetDisplayOffset(int horizontal_offset) { 855116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const int extra_content = GetContentWidth() - display_rect_.width(); 8565f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) const int cursor_width = cursor_enabled_ ? 1 : 0; 857116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 858116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch int min_offset = 0; 859116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch int max_offset = 0; 860116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (extra_content > 0) { 8615f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) switch (GetCurrentHorizontalAlignment()) { 862116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch case ALIGN_LEFT: 863116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch min_offset = -extra_content; 864116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch break; 865116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch case ALIGN_RIGHT: 866116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch max_offset = extra_content; 867116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch break; 868116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch case ALIGN_CENTER: 8695f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // The extra space reserved for cursor at the end of the text is ignored 8705f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // when centering text. So, to calculate the valid range for offset, we 8715f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // exclude that extra space, calculate the range, and add it back to the 8725f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // range (if cursor is enabled). 8735f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) min_offset = -(extra_content - cursor_width + 1) / 2 - cursor_width; 8745f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) max_offset = (extra_content - cursor_width) / 2; 875116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch break; 876116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch default: 877116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch break; 878116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch } 879116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch } 880116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (horizontal_offset < min_offset) 881116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch horizontal_offset = min_offset; 882116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch else if (horizontal_offset > max_offset) 883116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch horizontal_offset = max_offset; 884116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 885116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch cached_bounds_and_offset_valid_ = true; 886116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch display_offset_.set_x(horizontal_offset); 887116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch cursor_bounds_ = GetCursorBounds(selection_model_, insert_mode_); 888116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch} 889116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 8905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)RenderText::RenderText() 8915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : horizontal_alignment_(base::i18n::IsRTL() ? ALIGN_RIGHT : ALIGN_LEFT), 8925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) directionality_mode_(DIRECTIONALITY_FROM_TEXT), 8935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) text_direction_(base::i18n::UNKNOWN_DIRECTION), 8945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cursor_enabled_(true), 8955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cursor_visible_(false), 8965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) insert_mode_(true), 8972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) cursor_color_(kDefaultColor), 8982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) selection_color_(kDefaultColor), 8995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) selection_background_focused_color_(kDefaultSelectionBackgroundColor), 9005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) focused_(false), 901d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) composition_range_(Range::InvalidRange()), 9022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) colors_(kDefaultColor), 9032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) styles_(NUM_TEXT_STYLES), 9042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) composition_and_selection_styles_applied_(false), 9055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) obscured_(false), 906868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) obscured_reveal_index_(-1), 907eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch truncate_length_(0), 908116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch elide_behavior_(NO_ELIDE), 9095f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) replace_newline_chars_with_symbols_(true), 910d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) multiline_(false), 9115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) background_is_transparent_(false), 9125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) clip_to_display_rect_(true), 9130f1bc08d4cfcc34181b0b5cbf065c40f687bf740Torne (Richard Coles) baseline_(kInvalidBaseline), 9145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cached_bounds_and_offset_valid_(false) { 9155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SelectionModel RenderText::GetAdjacentSelectionModel( 9185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const SelectionModel& current, 9195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BreakType break_type, 9205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VisualCursorDirection direction) { 9215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) EnsureLayout(); 9225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (break_type == LINE_BREAK || text().empty()) 9245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return EdgeSelectionModel(direction); 9255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (break_type == CHARACTER_BREAK) 9265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return AdjacentCharSelectionModel(current, direction); 9275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(break_type == WORD_BREAK); 9285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return AdjacentWordSelectionModel(current, direction); 9295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)SelectionModel RenderText::EdgeSelectionModel( 9325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VisualCursorDirection direction) { 9335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (direction == GetVisualDirectionOfLogicalEnd()) 9345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SelectionModel(text().length(), CURSOR_FORWARD); 9355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SelectionModel(0, CURSOR_BACKWARD); 9365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::SetSelectionModel(const SelectionModel& model) { 9395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_LE(model.selection().GetMax(), text().length()); 9405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) selection_model_ = model; 9415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cached_bounds_and_offset_valid_ = false; 9425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 944868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)const base::string16& RenderText::GetLayoutText() const { 945a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return layout_text_; 9465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 948d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)const BreakList<size_t>& RenderText::GetLineBreaks() { 949d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) if (line_breaks_.max() != 0) 950d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return line_breaks_; 951d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 952a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) const base::string16& layout_text = GetLayoutText(); 953d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const size_t text_length = layout_text.length(); 954d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) line_breaks_.SetValue(0); 955d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) line_breaks_.SetMax(text_length); 956d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) base::i18n::BreakIterator iter(layout_text, 957d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) base::i18n::BreakIterator::BREAK_LINE); 958d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const bool success = iter.Init(); 959d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) DCHECK(success); 960d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) if (success) { 961d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) do { 962d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) line_breaks_.ApplyValue(iter.pos(), Range(iter.pos(), text_length)); 963d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) } while (iter.Advance()); 964d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) } 965d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return line_breaks_; 966d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)} 967d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 9682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void RenderText::ApplyCompositionAndSelectionStyles() { 9692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Save the underline and color breaks to undo the temporary styles later. 9702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(!composition_and_selection_styles_applied_); 9712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) saved_colors_ = colors_; 9722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) saved_underlines_ = styles_[UNDERLINE]; 9732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 9742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Apply an underline to the composition range in |underlines|. 9752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (composition_range_.IsValid() && !composition_range_.is_empty()) 9762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) styles_[UNDERLINE].ApplyValue(true, composition_range_); 9772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 9782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Apply the selected text color to the [un-reversed] selection range. 97968043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) if (!selection().is_empty() && focused()) { 980d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const Range range(selection().GetMin(), selection().GetMax()); 9812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) colors_.ApplyValue(selection_color_, range); 9825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) composition_and_selection_styles_applied_ = true; 9842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 9852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 9862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void RenderText::UndoCompositionAndSelectionStyles() { 9872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Restore the underline and color breaks to undo the temporary styles. 9882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(composition_and_selection_styles_applied_); 9892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) colors_ = saved_colors_; 9902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) styles_[UNDERLINE] = saved_underlines_; 9912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) composition_and_selection_styles_applied_ = false; 9925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 994d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)Vector2d RenderText::GetLineOffset(size_t line_number) { 9955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Vector2d offset = display_rect().OffsetFromOrigin(); 996d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // TODO(ckocagil): Apply the display offset for multiline scrolling. 997d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) if (!multiline()) 998d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) offset.Add(GetUpdatedDisplayOffset()); 999d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) else 1000d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) offset.Add(Vector2d(0, lines_[line_number].preceding_heights)); 1001d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) offset.Add(GetAlignmentOffset(line_number)); 10025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return offset; 10035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 10045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Point RenderText::ToTextPoint(const Point& point) { 1006d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return point - GetLineOffset(0); 1007d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // TODO(ckocagil): Convert multiline view space points to text space. 10085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 10095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Point RenderText::ToViewPoint(const Point& point) { 1011d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) if (!multiline()) 1012d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return point + GetLineOffset(0); 1013d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 1014d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // TODO(ckocagil): Traverse individual line segments for RTL support. 1015d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) DCHECK(!lines_.empty()); 1016d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) int x = point.x(); 1017d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) size_t line = 0; 1018d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) for (; line < lines_.size() && x > lines_[line].size.width(); ++line) 1019d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) x -= lines_[line].size.width(); 1020d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return Point(x, point.y()) + GetLineOffset(line); 10215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 10225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1023d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)std::vector<Rect> RenderText::TextBoundsToViewBounds(const Range& x) { 1024d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) std::vector<Rect> rects; 1025d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 1026d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) if (!multiline()) { 1027d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) rects.push_back(Rect(ToViewPoint(Point(x.GetMin(), 0)), 1028d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) Size(x.length(), GetStringSize().height()))); 1029d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return rects; 1030d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) } 1031d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 1032d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) EnsureLayout(); 1033d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 1034d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // Each line segment keeps its position in text coordinates. Traverse all line 1035d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // segments and if the segment intersects with the given range, add the view 1036d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // rect corresponding to the intersection to |rects|. 1037d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) for (size_t line = 0; line < lines_.size(); ++line) { 1038d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) int line_x = 0; 1039d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const Vector2d offset = GetLineOffset(line); 1040d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) for (size_t i = 0; i < lines_[line].segments.size(); ++i) { 1041d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const internal::LineSegment* segment = &lines_[line].segments[i]; 1042d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const Range intersection = segment->x_range.Intersect(x); 1043d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) if (!intersection.is_empty()) { 1044d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) Rect rect(line_x + intersection.start() - segment->x_range.start(), 1045d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 0, intersection.length(), lines_[line].size.height()); 1046d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) rects.push_back(rect + offset); 1047d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) } 1048d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) line_x += segment->x_range.length(); 1049d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) } 1050d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) } 1051d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 1052d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return rects; 1053d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)} 1054d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 10555f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles)HorizontalAlignment RenderText::GetCurrentHorizontalAlignment() { 10565f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) if (horizontal_alignment_ != ALIGN_TO_HEAD) 10575f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) return horizontal_alignment_; 10585f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) return GetTextDirection() == base::i18n::RIGHT_TO_LEFT ? ALIGN_RIGHT 10595f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) : ALIGN_LEFT; 10605f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles)} 10615f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) 1062d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)Vector2d RenderText::GetAlignmentOffset(size_t line_number) { 1063d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // TODO(ckocagil): Enable |lines_| usage in other platforms. 1064d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)#if defined(OS_WIN) 1065d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) DCHECK_LT(line_number, lines_.size()); 1066d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)#endif 106790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) Vector2d offset; 10685f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) HorizontalAlignment horizontal_alignment = GetCurrentHorizontalAlignment(); 10695f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) if (horizontal_alignment != ALIGN_LEFT) { 1070d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)#if defined(OS_WIN) 1071d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const int width = lines_[line_number].size.width() + 1072d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) (cursor_enabled_ ? 1 : 0); 1073d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)#else 1074d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) const int width = GetContentWidth(); 1075d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)#endif 1076d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) offset.set_x(display_rect().width() - width); 10775f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // Put any extra margin pixel on the left to match legacy behavior. 10785f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) if (horizontal_alignment == ALIGN_CENTER) 10795f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) offset.set_x((offset.x() + 1) / 2); 108090dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) } 1081f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 1082f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Vertically center the text. 1083f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) if (multiline_) { 1084f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) const int text_height = lines_.back().preceding_heights + 1085f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) lines_.back().size.height(); 1086f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) offset.set_y((display_rect_.height() - text_height) / 2); 1087f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) } else { 1088f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) offset.set_y(GetBaseline() - GetLayoutTextBaseline()); 1089f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) } 1090f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 109190dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) return offset; 10925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 10935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::ApplyFadeEffects(internal::SkiaTextRenderer* renderer) { 109546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const int width = display_rect().width(); 109646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) if (multiline() || elide_behavior_ != FADE_TAIL || GetContentWidth() <= width) 10975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 10985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 109946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const int gradient_width = CalculateFadeGradientWidth(font_list(), width); 11005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gradient_width == 0) 11015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 11025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11035f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) HorizontalAlignment horizontal_alignment = GetCurrentHorizontalAlignment(); 11042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Rect solid_part = display_rect(); 11052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Rect left_part; 11062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Rect right_part; 11075f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) if (horizontal_alignment != ALIGN_LEFT) { 11085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) left_part = solid_part; 11095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) left_part.Inset(0, 0, solid_part.width() - gradient_width, 0); 11105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) solid_part.Inset(gradient_width, 0, 0, 0); 11115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 11125f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) if (horizontal_alignment != ALIGN_RIGHT) { 11135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) right_part = solid_part; 11145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) right_part.Inset(solid_part.width() - gradient_width, 0, 0, 0); 11155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) solid_part.Inset(0, 0, gradient_width, 0); 11165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 11175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Rect text_rect = display_rect(); 1119d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) text_rect.Inset(GetAlignmentOffset(0).x(), 0, 0, 0); 11205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // TODO(msw): Use the actual text colors corresponding to each faded part. 11222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) skia::RefPtr<SkShader> shader = CreateFadeShader( 11232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) text_rect, left_part, right_part, colors_.breaks().front().second); 11242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (shader) 11251320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci renderer->SetShader(shader.get()); 11265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 11275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::ApplyTextShadows(internal::SkiaTextRenderer* renderer) { 1129f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) skia::RefPtr<SkDrawLooper> looper = CreateShadowDrawLooper(shadows_); 11302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) renderer->SetDrawLooper(looper.get()); 11315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 11325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 1134d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)bool RenderText::RangeContainsCaret(const Range& range, 11355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t caret_pos, 11365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LogicalCursorDirection caret_affinity) { 11375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NB: exploits unsigned wraparound (WG14/N1124 section 6.2.5 paragraph 9). 11385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t adjacent = (caret_affinity == CURSOR_BACKWARD) ? 11395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) caret_pos - 1 : caret_pos + 1; 1140d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) return range.Contains(Range(caret_pos, adjacent)); 11415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 11425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::MoveCursorTo(size_t position, bool select) { 11445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t cursor = std::min(position, text().length()); 1145010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (IsValidCursorIndex(cursor)) 11465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SetSelectionModel(SelectionModel( 1147d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) Range(select ? selection().start() : cursor, cursor), 11485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (cursor == 0) ? CURSOR_FORWARD : CURSOR_BACKWARD)); 11495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 11505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1151eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochvoid RenderText::UpdateLayoutText() { 1152eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch layout_text_.clear(); 1153d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) line_breaks_.SetMax(0); 1154eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 1155eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch if (obscured_) { 1156eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch size_t obscured_text_length = 115746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) static_cast<size_t>(UTF16IndexToOffset(text_, 0, text_.length())); 1158eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch layout_text_.assign(obscured_text_length, kPasswordReplacementChar); 1159eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 1160eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch if (obscured_reveal_index_ >= 0 && 1161eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch obscured_reveal_index_ < static_cast<int>(text_.length())) { 1162eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // Gets the index range in |text_| to be revealed. 1163eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch size_t start = obscured_reveal_index_; 1164eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch U16_SET_CP_START(text_.data(), 0, start); 1165eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch size_t end = start; 1166eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch UChar32 unused_char; 1167eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch U16_NEXT(text_.data(), end, text_.length(), unused_char); 1168eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 1169eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // Gets the index in |layout_text_| to be replaced. 1170eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch const size_t cp_start = 117146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) static_cast<size_t>(UTF16IndexToOffset(text_, 0, start)); 1172eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch if (layout_text_.length() > cp_start) 1173eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch layout_text_.replace(cp_start, 1, text_.substr(start, end - start)); 1174eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch } 1175a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } else { 1176a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) layout_text_ = text_; 1177eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch } 11785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1179a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const base::string16& text = layout_text_; 1180eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch if (truncate_length_ > 0 && truncate_length_ < text.length()) { 1181eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch // Truncate the text at a valid character break and append an ellipsis. 1182eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch icu::StringCharacterIterator iter(text.c_str()); 1183116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Respect ELIDE_HEAD and ELIDE_MIDDLE preferences during truncation. 1184116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (elide_behavior_ == ELIDE_HEAD) { 1185116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch iter.setIndex32(text.length() - truncate_length_ + 1); 1186116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch layout_text_.assign(kEllipsisUTF16 + text.substr(iter.getIndex())); 1187116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch } else if (elide_behavior_ == ELIDE_MIDDLE) { 1188116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch iter.setIndex32(truncate_length_ / 2); 1189116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const size_t ellipsis_start = iter.getIndex(); 1190116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch iter.setIndex32(text.length() - (truncate_length_ / 2)); 1191116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const size_t ellipsis_end = iter.getIndex(); 1192116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch DCHECK_LE(ellipsis_start, ellipsis_end); 1193116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch layout_text_.assign(text.substr(0, ellipsis_start) + kEllipsisUTF16 + 1194116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch text.substr(ellipsis_end)); 1195116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch } else { 1196116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch iter.setIndex32(truncate_length_ - 1); 1197116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch layout_text_.assign(text.substr(0, iter.getIndex()) + kEllipsisUTF16); 1198116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch } 1199868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) } 12005d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1201116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (elide_behavior_ != NO_ELIDE && elide_behavior_ != FADE_TAIL && 1202116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch !layout_text_.empty() && GetContentWidth() > display_rect_.width()) { 12035d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // This doesn't trim styles so ellipsis may get rendered as a different 12045d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // style than the preceding text. See crbug.com/327850. 1205116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch layout_text_.assign( 1206116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch Elide(layout_text_, display_rect_.width(), elide_behavior_)); 12075d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 1208a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1209116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Replace the newline character with a newline symbol in single line mode. 1210116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch static const base::char16 kNewline[] = { '\n', 0 }; 1211116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch static const base::char16 kNewlineSymbol[] = { 0x2424, 0 }; 12125f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) if (!multiline_ && replace_newline_chars_with_symbols_) 1213116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch base::ReplaceChars(layout_text_, kNewline, kNewlineSymbol, &layout_text_); 1214116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 12155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) ResetLayout(); 12165d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 12175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1218116680a4aac90f2aa7413d9095a592090648e557Ben Murdochbase::string16 RenderText::Elide(const base::string16& text, 1219116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch float available_width, 1220116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch ElideBehavior behavior) { 1221116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (available_width <= 0 || text.empty()) 1222116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch return base::string16(); 1223116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (behavior == ELIDE_EMAIL) 1224116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch return ElideEmail(text, available_width); 1225116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 12265d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Create a RenderText copy with attributes that affect the rendering width. 12275d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) scoped_ptr<RenderText> render_text(CreateInstance()); 12285d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->SetFontList(font_list_); 12295d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->SetDirectionalityMode(directionality_mode_); 12305d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->SetCursorEnabled(cursor_enabled_); 1231116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch render_text->set_truncate_length(truncate_length_); 12325d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->styles_ = styles_; 12335d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->colors_ = colors_; 12345d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->SetText(text); 1235116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (render_text->GetContentWidth() <= available_width) 1236116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch return text; 12375d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 123846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const base::string16 ellipsis = base::string16(kEllipsisUTF16); 1239116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const bool insert_ellipsis = (behavior != TRUNCATE); 1240116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const bool elide_in_middle = (behavior == ELIDE_MIDDLE); 1241116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const bool elide_at_beginning = (behavior == ELIDE_HEAD); 12425d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) StringSlicer slicer(text, ellipsis, elide_in_middle, elide_at_beginning); 12435d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 12445d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->SetText(ellipsis); 1245116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const float ellipsis_width = render_text->GetContentWidth(); 12465d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 1247116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (insert_ellipsis && (ellipsis_width > available_width)) 12485d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return base::string16(); 12495d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 12505d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Use binary search to compute the elided text. 12515d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) size_t lo = 0; 12525d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) size_t hi = text.length() - 1; 1253a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const base::i18n::TextDirection text_direction = GetTextDirection(); 12545d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) for (size_t guess = (lo + hi) / 2; lo <= hi; guess = (lo + hi) / 2) { 12555b892326406927b709cdaf6c384d4ababf456332Ben Murdoch // Restore colors. They will be truncated to size by SetText. 12565d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->colors_ = colors_; 1257116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch base::string16 new_text = 1258116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch slicer.CutString(guess, insert_ellipsis && behavior != ELIDE_TAIL); 12595d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->SetText(new_text); 12605d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 12615d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // This has to be an additional step so that the ellipsis is rendered with 12625d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // same style as trailing part of the text. 1263116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (insert_ellipsis && behavior == ELIDE_TAIL) { 12645d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // When ellipsis follows text whose directionality is not the same as that 12655d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // of the whole text, it will be rendered with the directionality of the 12665d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // whole text. Since we want ellipsis to indicate continuation of the 12675d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // preceding text, we force the directionality of ellipsis to be same as 12685d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // the preceding text using LTR or RTL markers. 12695d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) base::i18n::TextDirection trailing_text_direction = 12705d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) base::i18n::GetLastStrongCharacterDirection(new_text); 12715d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) new_text.append(ellipsis); 1272a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (trailing_text_direction != text_direction) { 12735d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) if (trailing_text_direction == base::i18n::LEFT_TO_RIGHT) 12745d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) new_text += base::i18n::kLeftToRightMark; 12755d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) else 12765d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) new_text += base::i18n::kRightToLeftMark; 12775d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 12785d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) render_text->SetText(new_text); 12795d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 12805d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 12815b892326406927b709cdaf6c384d4ababf456332Ben Murdoch // Restore styles. Make sure style ranges don't break new text graphemes. 12825b892326406927b709cdaf6c384d4ababf456332Ben Murdoch render_text->styles_ = styles_; 12835b892326406927b709cdaf6c384d4ababf456332Ben Murdoch for (size_t style = 0; style < NUM_TEXT_STYLES; ++style) { 12845b892326406927b709cdaf6c384d4ababf456332Ben Murdoch BreakList<bool>& break_list = render_text->styles_[style]; 12855b892326406927b709cdaf6c384d4ababf456332Ben Murdoch break_list.SetMax(render_text->text_.length()); 12865b892326406927b709cdaf6c384d4ababf456332Ben Murdoch Range range; 12875b892326406927b709cdaf6c384d4ababf456332Ben Murdoch while (range.end() < break_list.max()) { 12885b892326406927b709cdaf6c384d4ababf456332Ben Murdoch BreakList<bool>::const_iterator current_break = 12895b892326406927b709cdaf6c384d4ababf456332Ben Murdoch break_list.GetBreak(range.end()); 12905b892326406927b709cdaf6c384d4ababf456332Ben Murdoch range = break_list.GetRange(current_break); 12915b892326406927b709cdaf6c384d4ababf456332Ben Murdoch if (range.end() < break_list.max() && 12925b892326406927b709cdaf6c384d4ababf456332Ben Murdoch !render_text->IsValidCursorIndex(range.end())) { 12935b892326406927b709cdaf6c384d4ababf456332Ben Murdoch range.set_end(render_text->IndexOfAdjacentGrapheme(range.end(), 12945b892326406927b709cdaf6c384d4ababf456332Ben Murdoch CURSOR_FORWARD)); 12955b892326406927b709cdaf6c384d4ababf456332Ben Murdoch break_list.ApplyValue(current_break->second, range); 12965b892326406927b709cdaf6c384d4ababf456332Ben Murdoch } 12975b892326406927b709cdaf6c384d4ababf456332Ben Murdoch } 12985b892326406927b709cdaf6c384d4ababf456332Ben Murdoch } 12995b892326406927b709cdaf6c384d4ababf456332Ben Murdoch 13005d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // We check the width of the whole desired string at once to ensure we 13015d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // handle kerning/ligatures/etc. correctly. 1302116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const float guess_width = render_text->GetContentWidth(); 1303116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (guess_width == available_width) 13045d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) break; 1305116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (guess_width > available_width) { 13065d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) hi = guess - 1; 1307116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Move back on the loop terminating condition when the guess is too wide. 13085d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) if (hi < lo) 13095d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) lo = hi; 13105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } else { 13115d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) lo = guess + 1; 13125d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 13135d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 13145d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 13155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return render_text->text(); 13165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 13175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1318116680a4aac90f2aa7413d9095a592090648e557Ben Murdochbase::string16 RenderText::ElideEmail(const base::string16& email, 1319116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch float available_width) { 1320116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // The returned string will have at least one character besides the ellipsis 1321116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // on either side of '@'; if that's impossible, a single ellipsis is returned. 1322116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // If possible, only the username is elided. Otherwise, the domain is elided 1323116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // in the middle, splitting available width equally with the elided username. 1324116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // If the username is short enough that it doesn't need half the available 1325116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // width, the elided domain will occupy that extra width. 1326116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 1327116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Split the email into its local-part (username) and domain-part. The email 1328116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // spec allows for @ symbols in the username under some special requirements, 1329116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // but not in the domain part, so splitting at the last @ symbol is safe. 1330116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const size_t split_index = email.find_last_of('@'); 1331116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch DCHECK_NE(split_index, base::string16::npos); 1332116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch base::string16 username = email.substr(0, split_index); 1333116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch base::string16 domain = email.substr(split_index + 1); 1334116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch DCHECK(!username.empty()); 1335116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch DCHECK(!domain.empty()); 1336116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 1337116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Subtract the @ symbol from the available width as it is mandatory. 1338116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const base::string16 kAtSignUTF16 = base::ASCIIToUTF16("@"); 1339116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch available_width -= GetStringWidthF(kAtSignUTF16, font_list()); 1340116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 1341116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Check whether eliding the domain is necessary: if eliding the username 1342116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // is sufficient, the domain will not be elided. 1343116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const float full_username_width = GetStringWidthF(username, font_list()); 1344116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const float available_domain_width = available_width - 1345116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch std::min(full_username_width, 1346116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch GetStringWidthF(username.substr(0, 1) + kEllipsisUTF16, font_list())); 1347116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (GetStringWidthF(domain, font_list()) > available_domain_width) { 1348116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Elide the domain so that it only takes half of the available width. 1349116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Should the username not need all the width available in its half, the 1350116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // domain will occupy the leftover width. 1351116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // If |desired_domain_width| is greater than |available_domain_width|: the 1352116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // minimal username elision allowed by the specifications will not fit; thus 1353116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // |desired_domain_width| must be <= |available_domain_width| at all cost. 1354116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch const float desired_domain_width = 1355116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch std::min<float>(available_domain_width, 1356116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch std::max<float>(available_width - full_username_width, 1357116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch available_width / 2)); 1358116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch domain = Elide(domain, desired_domain_width, ELIDE_MIDDLE); 1359116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Failing to elide the domain such that at least one character remains 1360116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // (other than the ellipsis itself) remains: return a single ellipsis. 1361116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (domain.length() <= 1U) 1362116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch return base::string16(kEllipsisUTF16); 1363116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch } 1364116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 1365116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // Fit the username in the remaining width (at this point the elided username 1366116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // is guaranteed to fit with at least one character remaining given all the 1367116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // precautions taken earlier). 1368116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch available_width -= GetStringWidthF(domain, font_list()); 1369116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch username = Elide(username, available_width, ELIDE_TAIL); 1370116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch return username + kAtSignUTF16 + domain; 1371116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch} 1372116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 13735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::UpdateCachedBoundsAndOffset() { 13745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (cached_bounds_and_offset_valid_) 13755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 13765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1377d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) // TODO(ckocagil): Add support for scrolling multiline text. 1378d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) 13795f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) int delta_x = 0; 13805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 13815f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) if (cursor_enabled()) { 13825f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // When cursor is enabled, ensure it is visible. For this, set the valid 13835f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // flag true and calculate the current cursor bounds using the stale 13845f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // |display_offset_|. Then calculate the change in offset needed to move the 13855f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // cursor into the visible area. 13865f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) cached_bounds_and_offset_valid_ = true; 13875f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) cursor_bounds_ = GetCursorBounds(selection_model_, insert_mode_); 13885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 13895f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) // TODO(bidi): Show RTL glyphs at the cursor position for ALIGN_LEFT, etc. 13905f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) if (cursor_bounds_.right() > display_rect_.right()) 13915f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) delta_x = display_rect_.right() - cursor_bounds_.right(); 13925f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) else if (cursor_bounds_.x() < display_rect_.x()) 13935f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) delta_x = display_rect_.x() - cursor_bounds_.x(); 13945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 13955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 13965f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) SetDisplayOffset(display_offset_.x() + delta_x); 13975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 13985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 13995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RenderText::DrawSelection(Canvas* canvas) { 14005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::vector<Rect> sel = GetSubstringBounds(selection()); 14015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (std::vector<Rect>::const_iterator i = sel.begin(); i < sel.end(); ++i) 1402eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch canvas->FillRect(*i, selection_background_focused_color_); 14035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 14045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 14055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace gfx 1406