tooltip_manager.cc revision 5821806d5e7f356e8fa4b058a389a808ea183019
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 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/views/widget/tooltip_manager.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/string_split.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/utf_string_conversions.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/base/text/text_elider.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Maximum number of characters we allow in a tooltip. 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const size_t kMaxTooltipLength = 1024; 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Maximum number of lines we allow in the tooltip. 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const size_t kMaxLines = 6; 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace views { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void TooltipManager::TrimTooltipToFit(string16* text, 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int* max_width, 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int* line_count, 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x, 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int y, 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::NativeView context) { 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *max_width = 0; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *line_count = 0; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Clamp the tooltip length to kMaxTooltipLength so that we don't 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // accidentally DOS the user with a mega tooltip. 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (text->length() > kMaxTooltipLength) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *text = text->substr(0, kMaxTooltipLength); 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Determine the available width for the tooltip. 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int available_width = GetMaxWidth(x, y, context); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Split the string into at most kMaxLines lines. 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::vector<string16> lines; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::SplitString(*text, '\n', &lines); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (lines.size() > kMaxLines) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) lines.resize(kMaxLines); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *line_count = static_cast<int>(lines.size()); 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Format each line to fit. 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Font font = GetDefaultFont(); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) string16 result; 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (std::vector<string16>::iterator i = lines.begin(); i != lines.end(); 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ++i) { 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) string16 elided_text = 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ui::ElideText(*i, font, available_width, ui::ELIDE_AT_END); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *max_width = std::max(*max_width, font.GetStringWidth(elided_text)); 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!result.empty()) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result.push_back('\n'); 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result.append(elided_text); 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *text = result; 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace views 66