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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #ifndef RenderInline_h
     24 #define RenderInline_h
     25 
     26 #include "core/animation/ActiveAnimations.h"
     27 #include "core/rendering/InlineFlowBox.h"
     28 #include "core/rendering/RenderBoxModelObject.h"
     29 #include "core/rendering/RenderLineBoxList.h"
     30 
     31 namespace WebCore {
     32 
     33 class RenderInline : public RenderBoxModelObject {
     34 public:
     35     explicit RenderInline(Element*);
     36 
     37     static RenderInline* createAnonymous(Document*);
     38 
     39     RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     40     RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
     41 
     42     // If you have a RenderInline, use firstChild or lastChild instead.
     43     void slowFirstChild() const WTF_DELETED_FUNCTION;
     44     void slowLastChild() const WTF_DELETED_FUNCTION;
     45 
     46     virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE;
     47 
     48     Element* node() const { return toElement(RenderBoxModelObject::node()); }
     49 
     50     virtual LayoutUnit marginLeft() const OVERRIDE FINAL;
     51     virtual LayoutUnit marginRight() const OVERRIDE FINAL;
     52     virtual LayoutUnit marginTop() const OVERRIDE FINAL;
     53     virtual LayoutUnit marginBottom() const OVERRIDE FINAL;
     54     virtual LayoutUnit marginBefore(const RenderStyle* otherStyle = 0) const OVERRIDE FINAL;
     55     virtual LayoutUnit marginAfter(const RenderStyle* otherStyle = 0) const OVERRIDE FINAL;
     56     virtual LayoutUnit marginStart(const RenderStyle* otherStyle = 0) const OVERRIDE FINAL;
     57     virtual LayoutUnit marginEnd(const RenderStyle* otherStyle = 0) const OVERRIDE FINAL;
     58 
     59     virtual void absoluteRects(Vector<IntRect>&, const LayoutPoint& accumulatedOffset) const OVERRIDE FINAL;
     60     virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const OVERRIDE;
     61 
     62     virtual LayoutSize offsetFromContainer(const RenderObject*, const LayoutPoint&, bool* offsetDependsOnPoint = 0) const OVERRIDE FINAL;
     63 
     64     IntRect linesBoundingBox() const;
     65     LayoutRect linesVisualOverflowBoundingBox() const;
     66 
     67     InlineFlowBox* createAndAppendInlineFlowBox();
     68 
     69     void dirtyLineBoxes(bool fullLayout);
     70     void deleteLineBoxTree();
     71 
     72     RenderLineBoxList* lineBoxes() { return &m_lineBoxes; }
     73     const RenderLineBoxList* lineBoxes() const { return &m_lineBoxes; }
     74 
     75     InlineFlowBox* firstLineBox() const { return m_lineBoxes.firstLineBox(); }
     76     InlineFlowBox* lastLineBox() const { return m_lineBoxes.lastLineBox(); }
     77     InlineBox* firstLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? firstLineBox() : culledInlineFirstLineBox(); }
     78     InlineBox* lastLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? lastLineBox() : culledInlineLastLineBox(); }
     79 
     80     virtual RenderBoxModelObject* virtualContinuation() const OVERRIDE FINAL { return continuation(); }
     81     RenderInline* inlineElementContinuation() const;
     82 
     83     virtual void updateDragState(bool dragOn) OVERRIDE FINAL;
     84 
     85     LayoutSize offsetForInFlowPositionedInline(const RenderBox& child) const;
     86 
     87     virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE FINAL;
     88     void paintOutline(PaintInfo&, const LayoutPoint&);
     89 
     90     using RenderBoxModelObject::continuation;
     91     using RenderBoxModelObject::setContinuation;
     92 
     93     bool alwaysCreateLineBoxes() const { return m_alwaysCreateLineBoxes; }
     94     void setAlwaysCreateLineBoxes() { m_alwaysCreateLineBoxes = true; }
     95     void updateAlwaysCreateLineBoxes(bool fullLayout);
     96 
     97     virtual LayoutRect localCaretRect(InlineBox*, int, LayoutUnit* extraWidthToEndOfLine) OVERRIDE FINAL;
     98 
     99     bool hitTestCulledInline(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset);
    100 
    101 protected:
    102     virtual void willBeDestroyed() OVERRIDE;
    103 
    104     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
    105 
    106     virtual void computeSelfHitTestRects(Vector<LayoutRect>& rects, const LayoutPoint& layerOffset) const OVERRIDE;
    107 
    108 private:
    109     virtual RenderObjectChildList* virtualChildren() OVERRIDE FINAL { return children(); }
    110     virtual const RenderObjectChildList* virtualChildren() const OVERRIDE FINAL { return children(); }
    111     const RenderObjectChildList* children() const { return &m_children; }
    112     RenderObjectChildList* children() { return &m_children; }
    113 
    114     virtual const char* renderName() const OVERRIDE;
    115 
    116     virtual bool isRenderInline() const OVERRIDE FINAL { return true; }
    117 
    118     LayoutRect culledInlineVisualOverflowBoundingBox() const;
    119     InlineBox* culledInlineFirstLineBox() const;
    120     InlineBox* culledInlineLastLineBox() const;
    121 
    122     template<typename GeneratorContext>
    123     void generateLineBoxRects(GeneratorContext& yield) const;
    124     template<typename GeneratorContext>
    125     void generateCulledLineBoxRects(GeneratorContext& yield, const RenderInline* container) const;
    126 
    127     void addChildToContinuation(RenderObject* newChild, RenderObject* beforeChild);
    128     virtual void addChildIgnoringContinuation(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE FINAL;
    129 
    130     void splitInlines(RenderBlock* fromBlock, RenderBlock* toBlock, RenderBlock* middleBlock,
    131                       RenderObject* beforeChild, RenderBoxModelObject* oldCont);
    132     void splitFlow(RenderObject* beforeChild, RenderBlock* newBlockBox,
    133                    RenderObject* newChild, RenderBoxModelObject* oldCont);
    134 
    135     virtual void layout() OVERRIDE FINAL { ASSERT_NOT_REACHED(); } // Do nothing for layout()
    136 
    137     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL;
    138 
    139     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE FINAL;
    140 
    141     virtual LayerType layerTypeRequired() const OVERRIDE { return isInFlowPositioned() || createsGroup() || hasClipPath() || style()->shouldCompositeForCurrentAnimations() ? NormalLayer : NoLayer; }
    142 
    143     virtual LayoutUnit offsetLeft() const OVERRIDE FINAL;
    144     virtual LayoutUnit offsetTop() const OVERRIDE FINAL;
    145     virtual LayoutUnit offsetWidth() const OVERRIDE FINAL { return linesBoundingBox().width(); }
    146     virtual LayoutUnit offsetHeight() const OVERRIDE FINAL { return linesBoundingBox().height(); }
    147 
    148     virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer) const OVERRIDE;
    149     virtual LayoutRect rectWithOutlineForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, LayoutUnit outlineWidth) const OVERRIDE FINAL;
    150     virtual void mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect&, bool fixed) const OVERRIDE FINAL;
    151 
    152     virtual void mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0) const OVERRIDE;
    153 
    154     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE FINAL;
    155 
    156     virtual LayoutRect frameRectForStickyPositioning() const OVERRIDE FINAL { return linesBoundingBox(); }
    157 
    158     virtual IntRect borderBoundingBox() const OVERRIDE FINAL
    159     {
    160         IntRect boundingBox = linesBoundingBox();
    161         return IntRect(0, 0, boundingBox.width(), boundingBox.height());
    162     }
    163 
    164     virtual InlineFlowBox* createInlineFlowBox(); // Subclassed by SVG and Ruby
    165 
    166     virtual void dirtyLinesFromChangedChild(RenderObject* child) OVERRIDE FINAL { m_lineBoxes.dirtyLinesFromChangedChild(this, child); }
    167 
    168     virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const OVERRIDE FINAL;
    169     virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const OVERRIDE FINAL;
    170 
    171     virtual void childBecameNonInline(RenderObject* child) OVERRIDE FINAL;
    172 
    173     virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&) OVERRIDE FINAL;
    174 
    175     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE FINAL;
    176 
    177     virtual void addAnnotatedRegions(Vector<AnnotatedRegionValue>&) OVERRIDE FINAL;
    178 
    179     virtual void updateFromStyle() OVERRIDE FINAL;
    180 
    181     RenderInline* clone() const;
    182 
    183     void paintOutlineForLine(GraphicsContext*, const LayoutPoint&, const LayoutRect& prevLine, const LayoutRect& thisLine,
    184                              const LayoutRect& nextLine, const Color);
    185     RenderBoxModelObject* continuationBefore(RenderObject* beforeChild);
    186 
    187     RenderObjectChildList m_children;
    188     RenderLineBoxList m_lineBoxes;   // All of the line boxes created for this inline flow.  For example, <i>Hello<br>world.</i> will have two <i> line boxes.
    189 
    190     bool m_alwaysCreateLineBoxes : 1;
    191 };
    192 
    193 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderInline, isRenderInline());
    194 
    195 } // namespace WebCore
    196 
    197 #endif // RenderInline_h
    198