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/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "LayoutIntegrationInlineContentPainter.h"
#include "EllipsisBoxPainter.h"
#include "InlineBoxPainter.h"
#include "PaintInfo.h"
#include "RenderBox.h"
#include "RenderInline.h"
#include "RenderStyleInlines.h"
#include "TextBoxPainter.h"
#include <wtf/Assertions.h>
namespace WebCore {
namespace LayoutIntegration {
InlineContentPainter::InlineContentPainter(PaintInfo& paintInfo, const LayoutPoint& paintOffset, const RenderInline* inlineBoxWithLayer, const InlineContent& inlineContent, const RenderBlockFlow& root)
: m_paintInfo(paintInfo)
, m_paintOffset(paintOffset)
, m_inlineBoxWithLayer(inlineBoxWithLayer)
, m_inlineContent(inlineContent)
, m_root(root)
{
m_damageRect = m_paintInfo.rect;
m_damageRect.moveBy(-m_paintOffset);
}
void InlineContentPainter::paintEllipsis(size_t lineIndex)
{
if ((m_paintInfo.phase != PaintPhase::Foreground && m_paintInfo.phase != PaintPhase::TextClip) || root().style().usedVisibility() != Visibility::Visible)
return;
auto lineBox = InlineIterator::LineBox { InlineIterator::LineBoxIteratorModernPath { m_inlineContent, lineIndex } };
if (!lineBox.hasEllipsis())
return;
EllipsisBoxPainter { lineBox, m_paintInfo, m_paintOffset, root().selectionForegroundColor(), root().selectionBackgroundColor() }.paint();
}
void InlineContentPainter::paintDisplayBox(const InlineDisplay::Box& box)
{
auto hasDamage = [&](auto& box) {
auto rect = enclosingLayoutRect(box.inkOverflow());
root().flipForWritingMode(rect);
// FIXME: This should test for intersection but horizontal ink overflow is miscomputed in a few cases (like with negative letter-spacing).
return m_damageRect.maxY() > rect.y() && m_damageRect.y() < rect.maxY();
};
if (box.isFullyTruncated()) {
// Fully truncated boxes are visually empty and they don't show their descendants either (unlike visibility property).
return;
}
if (box.isLineBreak())
return;
if (box.isInlineBox()) {
if (!box.isVisible() || !hasDamage(box))
return;
auto canSkipInlineBoxPainting = [&]() {
if (m_paintInfo.phase != PaintPhase::Foreground)
return false;
// The root inline box only has to paint a background for ::first-line style.
bool isFirstLineBox = !box.lineIndex();
if (box.isRootInlineBox() && (!isFirstLineBox || &box.style() == &box.layoutBox().style()))
return true;
return false;
}();
if (canSkipInlineBoxPainting)
return;
auto inlineBoxPaintInfo = PaintInfo { m_paintInfo };
inlineBoxPaintInfo.phase = m_paintInfo.phase == PaintPhase::ChildOutlines ? PaintPhase::Outline : m_paintInfo.phase;
inlineBoxPaintInfo.outlineObjects = &m_outlineObjects;
InlineBoxPainter { m_inlineContent, box, inlineBoxPaintInfo, m_paintOffset }.paint();
return;
}
if (box.isText()) {
auto hasVisibleDamage = box.text().length() && box.isVisible() && hasDamage(box);
if (!hasVisibleDamage)
return;
if (!box.layoutBox().rendererForIntegration()) {
// FIXME: For some reason, we are getting to a state in which painting is requested for a box without renderer. We should try to figure out the root cause for this instead of bailing out here.
ASSERT_NOT_REACHED();
return;
}
TextBoxPainter { m_inlineContent, box, box.style(), m_paintInfo, m_paintOffset }.paint();
return;
}
if (auto* renderer = dynamicDowncast<RenderBox>(box.layoutBox().rendererForIntegration()); renderer && renderer->isReplacedOrAtomicInline()) {
if (m_paintInfo.shouldPaintWithinRoot(*renderer)) {
// FIXME: Painting should not require a non-const renderer.
const_cast<RenderBox*>(renderer)->paintAsInlineBlock(m_paintInfo, flippedContentOffsetIfNeeded(*renderer));
}
}
}
void InlineContentPainter::paint()
{
auto layerPaintScope = LayerPaintScope { m_inlineBoxWithLayer };
auto lastBoxLineIndex = std::optional<size_t> { };
auto paintLineEndingEllipsisIfApplicable = [&](std::optional<size_t> currentLineIndex) {
// Since line ending ellipsis belongs to the line structure but we don't have the concept of painting the line itself
// let's paint it when we are either at the end of the content or finished painting a line with ellipsis.
// While normally ellipsis is on the last line, -webkit-line-clamp can make us put ellipsis on any line.
if (m_inlineBoxWithLayer) {
// Line ending ellipsis is never on the inline box (with layer).
return;
}
if (lastBoxLineIndex && (!currentLineIndex || *lastBoxLineIndex != currentLineIndex))
paintEllipsis(*lastBoxLineIndex);
};
for (auto& box : m_inlineContent.boxesForRect(m_damageRect)) {
auto shouldPaintBoxForPhase = [&] {
switch (m_paintInfo.phase) {
case PaintPhase::ChildOutlines:
return box.isNonRootInlineBox();
case PaintPhase::SelfOutline:
return box.isRootInlineBox();
case PaintPhase::Outline:
return box.isInlineBox();
case PaintPhase::Mask:
return box.isInlineBox();
default:
return true;
}
};
if (shouldPaintBoxForPhase() && layerPaintScope.includes(box)) {
paintLineEndingEllipsisIfApplicable(box.lineIndex());
paintDisplayBox(box);
}
lastBoxLineIndex = box.lineIndex();
}
paintLineEndingEllipsisIfApplicable({ });
for (auto& renderInline : m_outlineObjects)
renderInline.paintOutline(m_paintInfo, m_paintOffset);
}
LayoutPoint InlineContentPainter::flippedContentOffsetIfNeeded(const RenderBox& childRenderer) const
{
if (root().writingMode().isBlockFlipped())
return root().flipForWritingModeForChild(childRenderer, m_paintOffset);
return m_paintOffset;
}
const RenderBlock& InlineContentPainter::root() const
{
return m_root;
}
LayerPaintScope::LayerPaintScope(const RenderInline* inlineBoxWithLayer)
: m_inlineBoxWithLayer(inlineBoxWithLayer ? inlineBoxWithLayer->layoutBox() : nullptr)
{
}
bool LayerPaintScope::includes(const InlineDisplay::Box& box)
{
auto isInside = [](auto& displayBox, auto& inlineBox)
{
ASSERT(inlineBox.isInlineBox());
if (displayBox.isRootInlineBox())
return false;
for (auto* box = &displayBox.layoutBox().parent(); box->isInlineBox(); box = &box->parent()) {
if (box == &inlineBox)
return true;
}
return false;
};
if (m_inlineBoxWithLayer == &box.layoutBox())
return true;
if (m_inlineBoxWithLayer && !isInside(box, *m_inlineBoxWithLayer))
return false;
if (m_currentExcludedInlineBox && isInside(box, *m_currentExcludedInlineBox))
return false;
m_currentExcludedInlineBox = nullptr;
if (box.isRootInlineBox() || box.isText() || box.isLineBreak())
return true;
auto* renderer = dynamicDowncast<RenderLayerModelObject>(box.layoutBox().rendererForIntegration());
bool hasSelfPaintingLayer = renderer && renderer->hasSelfPaintingLayer();
if (hasSelfPaintingLayer && box.isNonRootInlineBox())
m_currentExcludedInlineBox = &downcast<Layout::ElementBox>(box.layoutBox());
return !hasSelfPaintingLayer;
}
}
}
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