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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "config.h"
      6 #include "core/paint/LineBoxListPainter.h"
      7 
      8 #include "core/paint/InlinePainter.h"
      9 #include "core/rendering/InlineFlowBox.h"
     10 #include "core/rendering/PaintInfo.h"
     11 #include "core/rendering/RenderBoxModelObject.h"
     12 #include "core/rendering/RenderLineBoxList.h"
     13 #include "core/rendering/RootInlineBox.h"
     14 
     15 namespace blink {
     16 
     17 void LineBoxListPainter::paint(RenderBoxModelObject* renderer, PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
     18 {
     19     // Only paint during the foreground/selection phases.
     20     if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseOutline
     21         && paintInfo.phase != PaintPhaseSelfOutline && paintInfo.phase != PaintPhaseChildOutlines && paintInfo.phase != PaintPhaseTextClip
     22         && paintInfo.phase != PaintPhaseMask)
     23         return;
     24 
     25     ASSERT(renderer->isRenderBlock() || (renderer->isRenderInline() && renderer->hasLayer())); // The only way an inline could paint like this is if it has a layer.
     26 
     27     // If we have no lines then we have no work to do.
     28     if (!m_renderLineBoxList.firstLineBox())
     29         return;
     30 
     31     if (!m_renderLineBoxList.anyLineIntersectsRect(renderer, paintInfo.rect, paintOffset))
     32         return;
     33 
     34     PaintInfo info(paintInfo);
     35     ListHashSet<RenderInline*> outlineObjects;
     36     info.setOutlineObjects(&outlineObjects);
     37 
     38     // See if our root lines intersect with the dirty rect. If so, then we paint
     39     // them. Note that boxes can easily overlap, so we can't make any assumptions
     40     // based off positions of our first line box or our last line box.
     41     for (InlineFlowBox* curr = m_renderLineBoxList.firstLineBox(); curr; curr = curr->nextLineBox()) {
     42         if (m_renderLineBoxList.lineIntersectsDirtyRect(renderer, curr, info, paintOffset)) {
     43             RootInlineBox& root = curr->root();
     44             curr->paint(info, paintOffset, root.lineTop(), root.lineBottom());
     45         }
     46     }
     47 
     48     if (info.phase == PaintPhaseOutline || info.phase == PaintPhaseSelfOutline || info.phase == PaintPhaseChildOutlines) {
     49         ListHashSet<RenderInline*>::iterator end = info.outlineObjects()->end();
     50         for (ListHashSet<RenderInline*>::iterator it = info.outlineObjects()->begin(); it != end; ++it) {
     51             RenderInline* flow = *it;
     52             InlinePainter(*flow).paintOutline(info, paintOffset);
     53         }
     54         info.outlineObjects()->clear();
     55     }
     56 }
     57 
     58 } // namespace blink
     59