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
15namespace blink {
16
17void 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