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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "core/css/CSSPaintValue.h"
#include "core/css/CSSCustomIdentValue.h"
#include "core/layout/LayoutObject.h"
#include "platform/graphics/Image.h"
#include "wtf/text/StringBuilder.h"
namespace blink {
CSSPaintValue::CSSPaintValue(CSSCustomIdentValue* name)
: CSSImageGeneratorValue(PaintClass),
m_name(name),
m_paintImageGeneratorObserver(new Observer(this)) {}
CSSPaintValue::~CSSPaintValue() {}
String CSSPaintValue::customCSSText() const {
StringBuilder result;
result.append("paint(");
result.append(m_name->customCSSText());
result.append(')');
return result.toString();
}
String CSSPaintValue::name() const {
return m_name->value();
}
PassRefPtr<Image> CSSPaintValue::image(const LayoutObject& layoutObject,
const IntSize& size,
float zoom) {
if (!m_generator)
m_generator = CSSPaintImageGenerator::create(
name(), layoutObject.document(), m_paintImageGeneratorObserver);
return m_generator->paint(layoutObject, size, zoom);
}
void CSSPaintValue::Observer::paintImageGeneratorReady() {
m_ownerValue->paintImageGeneratorReady();
}
void CSSPaintValue::paintImageGeneratorReady() {
for (const LayoutObject* client : clients().keys()) {
const_cast<LayoutObject*>(client)->imageChanged(
static_cast<WrappedImagePtr>(this));
}
}
bool CSSPaintValue::knownToBeOpaque(const LayoutObject& layoutObject) const {
return m_generator && !m_generator->hasAlpha();
}
bool CSSPaintValue::equals(const CSSPaintValue& other) const {
return name() == other.name();
}
DEFINE_TRACE_AFTER_DISPATCH(CSSPaintValue) {
visitor->trace(m_name);
visitor->trace(m_generator);
visitor->trace(m_paintImageGeneratorObserver);
CSSImageGeneratorValue::traceAfterDispatch(visitor);
}
} // namespace blink
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