| /* |
| * (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2009, 2010, 2011 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. |
| * |
| */ |
| |
| #ifndef InlineTextBox_h |
| #define InlineTextBox_h |
| |
| #include "core/rendering/InlineBox.h" |
| #include "core/rendering/RenderText.h" // so textRenderer() can be inline |
| #include "platform/text/TextRun.h" |
| #include "wtf/Forward.h" |
| |
| namespace blink { |
| |
| struct CompositionUnderline; |
| class DocumentMarker; |
| class GraphicsContext; |
| |
| const unsigned short cNoTruncation = USHRT_MAX; |
| const unsigned short cFullTruncation = USHRT_MAX - 1; |
| |
| class InlineTextBox : public InlineBox { |
| public: |
| InlineTextBox(RenderObject& obj) |
| : InlineBox(obj) |
| , m_prevTextBox(0) |
| , m_nextTextBox(0) |
| , m_start(0) |
| , m_len(0) |
| , m_truncation(cNoTruncation) |
| { |
| } |
| |
| RenderText& renderer() const { return toRenderText(InlineBox::renderer()); } |
| |
| virtual void destroy() OVERRIDE FINAL; |
| |
| InlineTextBox* prevTextBox() const { return m_prevTextBox; } |
| InlineTextBox* nextTextBox() const { return m_nextTextBox; } |
| void setNextTextBox(InlineTextBox* n) { m_nextTextBox = n; } |
| void setPreviousTextBox(InlineTextBox* p) { m_prevTextBox = p; } |
| |
| // FIXME: These accessors should ASSERT(!isDirty()). See https://bugs.webkit.org/show_bug.cgi?id=97264 |
| unsigned start() const { return m_start; } |
| unsigned end() const { return m_len ? m_start + m_len - 1 : m_start; } |
| unsigned len() const { return m_len; } |
| |
| void setStart(unsigned start) { m_start = start; } |
| void setLen(unsigned len) { m_len = len; } |
| |
| void offsetRun(int d) { ASSERT(!isDirty()); m_start += d; } |
| |
| unsigned short truncation() { return m_truncation; } |
| |
| virtual void markDirty() OVERRIDE FINAL; |
| |
| using InlineBox::hasHyphen; |
| using InlineBox::setHasHyphen; |
| using InlineBox::canHaveLeadingExpansion; |
| using InlineBox::setCanHaveLeadingExpansion; |
| |
| static inline bool compareByStart(const InlineTextBox* first, const InlineTextBox* second) { return first->start() < second->start(); } |
| |
| virtual int baselinePosition(FontBaseline) const OVERRIDE FINAL; |
| virtual LayoutUnit lineHeight() const OVERRIDE FINAL; |
| |
| bool getEmphasisMarkPosition(RenderStyle*, TextEmphasisPosition&) const; |
| |
| LayoutRect logicalOverflowRect() const; |
| void setLogicalOverflowRect(const LayoutRect&); |
| LayoutUnit logicalTopVisualOverflow() const { return logicalOverflowRect().y(); } |
| LayoutUnit logicalBottomVisualOverflow() const { return logicalOverflowRect().maxY(); } |
| |
| #ifndef NDEBUG |
| virtual void showBox(int = 0) const OVERRIDE; |
| virtual const char* boxName() const OVERRIDE; |
| #endif |
| |
| enum RotationDirection { Counterclockwise, Clockwise }; |
| static AffineTransform rotation(const FloatRect& boxRect, RotationDirection); |
| private: |
| LayoutUnit selectionTop(); |
| LayoutUnit selectionBottom(); |
| LayoutUnit selectionHeight(); |
| |
| // charactersWithHyphen, if provided, must not be destroyed before the TextRun. |
| TextRun constructTextRun(RenderStyle*, const Font&, StringBuilder* charactersWithHyphen = 0) const; |
| TextRun constructTextRun(RenderStyle*, const Font&, StringView, int maximumLength, StringBuilder* charactersWithHyphen = 0) const; |
| |
| public: |
| TextRun constructTextRunForInspector(RenderStyle*, const Font&) const; |
| virtual FloatRect calculateBoundaries() const OVERRIDE { return FloatRect(x(), y(), width(), height()); } |
| |
| virtual LayoutRect localSelectionRect(int startPos, int endPos); |
| bool isSelected(int startPos, int endPos) const; |
| void selectionStartEnd(int& sPos, int& ePos); |
| |
| protected: |
| virtual void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) OVERRIDE; |
| virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) OVERRIDE; |
| |
| private: |
| virtual void deleteLine() OVERRIDE FINAL; |
| virtual void extractLine() OVERRIDE FINAL; |
| virtual void attachLine() OVERRIDE FINAL; |
| |
| public: |
| virtual RenderObject::SelectionState selectionState() OVERRIDE FINAL; |
| |
| private: |
| virtual void clearTruncation() OVERRIDE FINAL { m_truncation = cNoTruncation; } |
| virtual float placeEllipsisBox(bool flowIsLTR, float visibleLeftEdge, float visibleRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) OVERRIDE FINAL; |
| |
| public: |
| virtual bool isLineBreak() const OVERRIDE FINAL; |
| |
| void setExpansion(int newExpansion) |
| { |
| m_logicalWidth -= expansion(); |
| InlineBox::setExpansion(newExpansion); |
| m_logicalWidth += newExpansion; |
| } |
| |
| private: |
| virtual bool isInlineTextBox() const OVERRIDE FINAL { return true; } |
| |
| public: |
| virtual int caretMinOffset() const OVERRIDE FINAL; |
| virtual int caretMaxOffset() const OVERRIDE FINAL; |
| |
| private: |
| float textPos() const; // returns the x position relative to the left start of the text line. |
| |
| public: |
| virtual int offsetForPosition(float x, bool includePartialGlyphs = true) const; |
| virtual float positionForOffset(int offset) const; |
| |
| bool containsCaretOffset(int offset) const; // false for offset after line break |
| |
| // Fills a vector with the pixel width of each character. |
| void characterWidths(Vector<float>&) const; |
| |
| private: |
| InlineTextBox* m_prevTextBox; // The previous box that also uses our RenderObject |
| InlineTextBox* m_nextTextBox; // The next box that also uses our RenderObject |
| |
| int m_start; |
| unsigned short m_len; |
| |
| unsigned short m_truncation; // Where to truncate when text overflow is applied. We use special constants to |
| // denote no truncation (the whole run paints) and full truncation (nothing paints at all). |
| |
| unsigned underlinePaintStart(const CompositionUnderline&); |
| unsigned underlinePaintEnd(const CompositionUnderline&); |
| |
| protected: |
| void paintSingleCompositionBackgroundRun(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, Color backgroundColor, int startPos, int endPos); |
| void paintCompositionBackgrounds(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, bool useCustomUnderlines); |
| void paintDocumentMarkers(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, bool background); |
| void paintCompositionUnderline(GraphicsContext*, const FloatPoint& boxOrigin, const CompositionUnderline&); |
| |
| // These functions both paint markers and update the DocumentMarker's renderedRect. |
| virtual void paintDocumentMarker(GraphicsContext*, const FloatPoint& boxOrigin, DocumentMarker*, RenderStyle*, const Font&, bool grammar); |
| virtual void paintTextMatchMarker(GraphicsContext*, const FloatPoint& boxOrigin, DocumentMarker*, RenderStyle*, const Font&); |
| |
| private: |
| void paintDecoration(GraphicsContext*, const FloatPoint& boxOrigin, TextDecoration, const ShadowList*); |
| void paintSelection(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, Color textColor); |
| |
| TextRun::ExpansionBehavior expansionBehavior() const |
| { |
| return (canHaveLeadingExpansion() ? TextRun::AllowLeadingExpansion : TextRun::ForbidLeadingExpansion) |
| | (expansion() && nextLeafChild() ? TextRun::AllowTrailingExpansion : TextRun::ForbidTrailingExpansion); |
| } |
| }; |
| |
| DEFINE_INLINE_BOX_TYPE_CASTS(InlineTextBox); |
| |
| void alignSelectionRectToDevicePixels(FloatRect&); |
| |
| inline AffineTransform InlineTextBox::rotation(const FloatRect& boxRect, RotationDirection rotationDirection) |
| { |
| return rotationDirection == 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()); |
| } |
| |
| } // namespace blink |
| |
| #endif // InlineTextBox_h |