| /* |
| * (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #pragma once |
| |
| #include "AffineTransform.h" |
| #include "FloatRect.h" |
| #include "ShadowData.h" |
| #include "TextFlags.h" |
| #include "TextPaintStyle.h" |
| #include <wtf/text/AtomicString.h> |
| |
| namespace WebCore { |
| |
| class FontCascade; |
| class RenderCombineText; |
| class TextRun; |
| |
| struct TextPaintStyle; |
| |
| enum RotationDirection { Counterclockwise, Clockwise }; |
| |
| static inline AffineTransform rotation(const FloatRect& boxRect, RotationDirection clockwise) |
| { |
| return clockwise ? AffineTransform(0, 1, -1, 0, boxRect.x() + boxRect.maxY(), boxRect.maxY() - boxRect.x()) |
| : AffineTransform(0, -1, 1, 0, boxRect.x() - boxRect.maxY(), boxRect.x() + boxRect.maxY()); |
| } |
| |
| class TextPainter { |
| public: |
| TextPainter(GraphicsContext&); |
| |
| void setTextPaintStyle(const TextPaintStyle& textPaintStyle) { m_textPaintStyle = textPaintStyle; } |
| void setSelectionPaintStyle(const TextPaintStyle& selectionPaintStyle) { m_selectionPaintStyle = selectionPaintStyle; } |
| void setIsHorizontal(bool isHorizontal) { m_textBoxIsHorizontal = isHorizontal; } |
| void setFont(const FontCascade& font) { m_font = &font; } |
| void addEmphasis(const AtomicString& emphasisMark, float emphasisMarkOffset, RenderCombineText*); |
| void addTextShadow(const ShadowData* textShadow, const ShadowData* selectionShadow); |
| |
| void paintText(const TextRun&, unsigned length, const FloatRect& boxRect, const FloatPoint& textOrigin, |
| unsigned selectionStart = 0, unsigned selectionEnd = 0, bool paintSelectedTextOnly = false, bool paintSelectedTextSeparately = false); |
| |
| private: |
| void drawTextOrEmphasisMarks(const FontCascade&, const TextRun&, const AtomicString& emphasisMark, float emphasisMarkOffset, |
| const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset); |
| void paintTextWithShadows(const ShadowData*, const FontCascade&, const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, |
| unsigned startOffset, unsigned endOffset, const AtomicString& emphasisMark, float emphasisMarkOffset, bool stroked); |
| void paintTextAndEmphasisMarksIfNeeded(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset, |
| const TextPaintStyle&, const ShadowData*); |
| |
| GraphicsContext& m_context; |
| const FontCascade* m_font { nullptr }; |
| TextPaintStyle m_textPaintStyle; |
| TextPaintStyle m_selectionPaintStyle; |
| const ShadowData* m_textShadow { nullptr }; |
| const ShadowData* m_selectionShadow { nullptr }; |
| AtomicString m_emphasisMark; |
| RenderCombineText* m_combinedText { nullptr }; |
| float m_emphasisMarkOffset { 0 }; |
| bool m_textBoxIsHorizontal { true }; |
| }; |
| |
| inline void TextPainter::addEmphasis(const AtomicString& emphasisMark, float emphasisMarkOffset, RenderCombineText* combinedText) |
| { |
| m_emphasisMark = emphasisMark; |
| m_emphasisMarkOffset = emphasisMarkOffset; |
| m_combinedText = combinedText; |
| } |
| |
| inline void TextPainter::addTextShadow(const ShadowData* textShadow, const ShadowData* selectionShadow) |
| { |
| m_textShadow = textShadow; |
| m_selectionShadow = selectionShadow; |
| } |
| |
| class ShadowApplier { |
| public: |
| ShadowApplier(GraphicsContext&, const ShadowData*, const FloatRect& textRect, bool lastShadowIterationShouldDrawText = true, bool opaque = false, FontOrientation = Horizontal); |
| FloatSize extraOffset() const { return m_extraOffset; } |
| bool nothingToDraw() const { return m_nothingToDraw; } |
| bool didSaveContext() const { return m_didSaveContext; } |
| ~ShadowApplier(); |
| |
| private: |
| bool isLastShadowIteration(); |
| bool shadowIsCompletelyCoveredByText(bool textIsOpaque); |
| |
| FloatSize m_extraOffset; |
| GraphicsContext& m_context; |
| const ShadowData* m_shadow; |
| bool m_onlyDrawsShadow : 1; |
| bool m_avoidDrawingShadow : 1; |
| bool m_nothingToDraw : 1; |
| bool m_didSaveContext : 1; |
| }; |
| |
| inline bool ShadowApplier::isLastShadowIteration() |
| { |
| return m_shadow && !m_shadow->next(); |
| } |
| |
| inline bool ShadowApplier::shadowIsCompletelyCoveredByText(bool textIsOpaque) |
| { |
| return textIsOpaque && m_shadow && m_shadow->location() == IntPoint() && !m_shadow->radius(); |
| } |
| |
| } // namespace WebCore |