210 lines
8.6 KiB
C++
210 lines
8.6 KiB
C++
/*
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* (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 2000 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004-2017 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#pragma once
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#include "LegacyInlineBox.h"
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#include "MarkedText.h"
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#include "RenderText.h"
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#include "TextRun.h"
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namespace WebCore {
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class RenderCombineText;
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class RenderedDocumentMarker;
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class TextPainter;
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struct CompositionUnderline;
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struct MarkedText;
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struct StyledMarkedText;
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struct TextBoxSelectableRange;
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struct TextPaintStyle;
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const unsigned short cNoTruncation = USHRT_MAX;
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const unsigned short cFullTruncation = USHRT_MAX - 1;
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class LegacyInlineTextBox : public LegacyInlineBox {
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WTF_MAKE_ISO_ALLOCATED(LegacyInlineTextBox);
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public:
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explicit LegacyInlineTextBox(RenderText& renderer)
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: LegacyInlineBox(renderer)
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{
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setBehavesLikeText(true);
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}
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virtual ~LegacyInlineTextBox();
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RenderText& renderer() const { return downcast<RenderText>(LegacyInlineBox::renderer()); }
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const RenderStyle& lineStyle() const { return isFirstLine() ? renderer().firstLineStyle() : renderer().style(); }
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LegacyInlineTextBox* prevTextBox() const { return m_prevTextBox; }
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LegacyInlineTextBox* nextTextBox() const { return m_nextTextBox; }
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void setNextTextBox(LegacyInlineTextBox* n) { m_nextTextBox = n; }
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void setPreviousTextBox(LegacyInlineTextBox* p) { m_prevTextBox = p; }
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bool hasTextContent() const;
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// These functions do not account for combined text. For combined text this box will always have len() == 1
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// regardless of whether the resulting composition is the empty string. Use hasTextContent() if you want to
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// know whether this box has text content.
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//
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// FIXME: These accessors should ASSERT(!isDirty()). See https://bugs.webkit.org/show_bug.cgi?id=97264
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// Note len() == 1 for combined text regardless of whether the composition is empty. Use hasTextContent() to
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unsigned start() const { return m_start; }
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unsigned end() const { return m_start + m_len; }
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unsigned len() const { return m_len; }
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void setStart(unsigned start) { m_start = start; }
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void setLen(unsigned len) { m_len = len; }
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void offsetRun(int d) { ASSERT(!isDirty()); ASSERT(d > 0 || m_start >= static_cast<unsigned>(-d)); m_start += d; }
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unsigned short truncation() const { return m_truncation; }
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TextBoxSelectableRange selectableRange() const;
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void markDirty(bool dirty = true) final;
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using LegacyInlineBox::hasHyphen;
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using LegacyInlineBox::setHasHyphen;
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using LegacyInlineBox::canHaveLeftExpansion;
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using LegacyInlineBox::setCanHaveLeftExpansion;
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using LegacyInlineBox::canHaveRightExpansion;
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using LegacyInlineBox::setCanHaveRightExpansion;
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using LegacyInlineBox::forceRightExpansion;
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using LegacyInlineBox::setForceRightExpansion;
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using LegacyInlineBox::forceLeftExpansion;
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using LegacyInlineBox::setForceLeftExpansion;
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static inline bool compareByStart(const LegacyInlineTextBox* first, const LegacyInlineTextBox* second) { return first->start() < second->start(); }
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LayoutUnit baselinePosition(FontBaseline) const final;
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LayoutUnit lineHeight() const final;
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std::optional<bool> emphasisMarkExistsAndIsAbove(const RenderStyle&) const;
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LayoutRect logicalOverflowRect() const;
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void setLogicalOverflowRect(const LayoutRect&);
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LayoutUnit logicalTopVisualOverflow() const { return logicalOverflowRect().y(); }
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LayoutUnit logicalBottomVisualOverflow() const { return logicalOverflowRect().maxY(); }
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LayoutUnit logicalLeftVisualOverflow() const { return logicalOverflowRect().x(); }
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LayoutUnit logicalRightVisualOverflow() const { return logicalOverflowRect().maxX(); }
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virtual void dirtyOwnLineBoxes() { dirtyLineBoxes(); }
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#if ENABLE(TREE_DEBUGGING)
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void outputLineBox(WTF::TextStream&, bool mark, int depth) const final;
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const char* boxName() const final;
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#endif
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private:
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LayoutUnit selectionTop() const;
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LayoutUnit selectionBottom() const;
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LayoutUnit selectionHeight() const;
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public:
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virtual LayoutRect localSelectionRect(unsigned startPos, unsigned endPos) const;
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bool isSelectable(unsigned startPosition, unsigned endPosition) const;
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std::pair<unsigned, unsigned> selectionStartEnd() const;
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protected:
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void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) override;
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bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom, HitTestAction) override;
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private:
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void deleteLine() final;
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void extractLine() final;
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void attachLine() final;
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public:
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RenderObject::HighlightState selectionState() final;
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private:
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void clearTruncation() final { m_truncation = cNoTruncation; }
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float placeEllipsisBox(bool flowIsLTR, float visibleLeftEdge, float visibleRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) final;
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public:
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bool isLineBreak() const final;
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private:
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bool isInlineTextBox() const final { return true; }
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public:
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int caretMinOffset() const final;
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int caretMaxOffset() const final;
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private:
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float textPos() const; // returns the x position relative to the left start of the text line.
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public:
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virtual int offsetForPosition(float x, bool includePartialGlyphs = true) const;
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virtual float positionForOffset(unsigned offset) const;
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bool hasMarkers() const;
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FloatRect calculateUnionOfAllDocumentMarkerBounds() const;
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FloatRect calculateDocumentMarkerBounds(const MarkedText&) const;
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private:
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FloatPoint textOriginFromBoxRect(const FloatRect&) const;
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void paintMarkedTexts(PaintInfo&, MarkedText::PaintPhase, const FloatRect& boxRect, const Vector<StyledMarkedText>&, const FloatRect& decorationClipOutRect = { });
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void paintPlatformDocumentMarker(GraphicsContext&, const FloatPoint& boxOrigin, const MarkedText&);
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void paintPlatformDocumentMarkers(GraphicsContext&, const FloatPoint& boxOrigin);
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void paintCompositionBackground(PaintInfo&, const FloatPoint& boxOrigin);
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void paintCompositionUnderlines(PaintInfo&, const FloatPoint& boxOrigin) const;
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void paintCompositionUnderline(PaintInfo&, const FloatPoint& boxOrigin, const CompositionUnderline&) const;
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enum class MarkedTextBackgroundStyle : bool { Default, Rounded };
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void paintMarkedTextBackground(PaintInfo&, const FloatPoint& boxOrigin, const Color&, unsigned clampedStartOffset, unsigned clampedEndOffset, MarkedTextBackgroundStyle = MarkedTextBackgroundStyle::Default);
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void paintMarkedTextForeground(PaintInfo&, const FloatRect& boxRect, const StyledMarkedText&);
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void paintMarkedTextDecoration(PaintInfo&, const FloatRect& boxRect, const FloatRect& clipOutRect, const StyledMarkedText&);
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const RenderCombineText* combinedText() const;
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const FontCascade& lineFont() const;
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ShadowData* debugTextShadow();
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String text(bool ignoreCombinedText = false, bool ignoreHyphen = false) const; // The effective text for the run.
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TextRun createTextRun(bool ignoreCombinedText = false, bool ignoreHyphen = false) const;
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ExpansionBehavior expansionBehavior() const;
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void behavesLikeText() const = delete;
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LegacyInlineTextBox* m_prevTextBox { nullptr }; // The previous box that also uses our RenderObject
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LegacyInlineTextBox* m_nextTextBox { nullptr }; // The next box that also uses our RenderObject
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unsigned m_start { 0 };
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unsigned short m_len { 0 };
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// Where to truncate when text overflow is applied. We use special constants to
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// denote no truncation (the whole run paints) and full truncation (nothing paints at all).
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unsigned short m_truncation { cNoTruncation };
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};
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LayoutRect snappedSelectionRect(const LayoutRect&, float logicalRight, float selectionTop, float selectionHeight, bool isHorizontal);
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_INLINE_BOX(LegacyInlineTextBox, isInlineTextBox())
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