1/* 2 * Copyright (C) 2007 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25#include "config.h" 26#include "WebCoreTextRenderer.h" 27 28#include "Font.h" 29#include "FontDescription.h" 30#include "GraphicsContext.h" 31#include "StringTruncator.h" 32#include "TextRun.h" 33#include <wtf/unicode/Unicode.h> 34 35namespace WebCore { 36 37static bool shouldUseFontSmoothing = true; 38 39static bool isOneLeftToRightRun(const TextRun& run) 40{ 41 for (int i = 0; i < run.length(); i++) { 42 WTF::Unicode::Direction direction = WTF::Unicode::direction(run[i]); 43 if (direction == WTF::Unicode::RightToLeft || direction > WTF::Unicode::OtherNeutral) 44 return false; 45 } 46 return true; 47} 48 49static void doDrawTextAtPoint(GraphicsContext& context, const String& text, const IntPoint& point, const Font& font, const Color& color, int underlinedIndex) 50{ 51 TextRun run(text.characters(), text.length()); 52 53 context.setFillColor(color, ColorSpaceDeviceRGB); 54 if (isOneLeftToRightRun(run)) 55 font.drawText(&context, run, point); 56 else 57 context.drawBidiText(font, run, point); 58 59 if (underlinedIndex >= 0) { 60 ASSERT(underlinedIndex < static_cast<int>(text.length())); 61 62 int beforeWidth; 63 if (underlinedIndex > 0) { 64 TextRun beforeRun(text.characters(), underlinedIndex); 65 beforeWidth = font.width(beforeRun); 66 } else 67 beforeWidth = 0; 68 69 TextRun underlinedRun(text.characters() + underlinedIndex, 1); 70 int underlinedWidth = font.width(underlinedRun); 71 72 IntPoint underlinePoint(point); 73 underlinePoint.move(beforeWidth, 1); 74 75 context.setStrokeColor(color, ColorSpaceDeviceRGB); 76 context.drawLineForText(underlinePoint, underlinedWidth, false); 77 } 78} 79 80void WebCoreDrawTextAtPoint(GraphicsContext& context, const String& text, const IntPoint& point, const Font& font, const Color& color, int underlinedIndex) 81{ 82 context.save(); 83 84 doDrawTextAtPoint(context, text, point, font, color, underlinedIndex); 85 86 context.restore(); 87} 88 89void WebCoreDrawDoubledTextAtPoint(GraphicsContext& context, const String& text, const IntPoint& point, const Font& font, const Color& topColor, const Color& bottomColor, int underlinedIndex) 90{ 91 context.save(); 92 93 IntPoint textPos = point; 94 95 doDrawTextAtPoint(context, text, textPos, font, bottomColor, underlinedIndex); 96 textPos.move(0, -1); 97 doDrawTextAtPoint(context, text, textPos, font, topColor, underlinedIndex); 98 99 context.restore(); 100} 101 102float WebCoreTextFloatWidth(const String& text, const Font& font) 103{ 104 return StringTruncator::width(text, font); 105} 106 107void WebCoreSetShouldUseFontSmoothing(bool smooth) 108{ 109 shouldUseFontSmoothing = smooth; 110} 111 112bool WebCoreShouldUseFontSmoothing() 113{ 114 return shouldUseFontSmoothing; 115} 116 117void WebCoreSetAlwaysUsesComplexTextCodePath(bool complex) 118{ 119 Font::setCodePath(complex ? Font::Complex : Font::Auto); 120} 121 122bool WebCoreAlwaysUsesComplexTextCodePath() 123{ 124 return Font::codePath() == Font::Complex; 125} 126 127} // namespace WebCore 128