A sizes attribute parser

Source/core/css/MediaValuesDynamic.cpp

Index: Source/core/css/MediaValuesDynamic.cpp
diff --git a/Source/core/css/MediaValuesDynamic.cpp b/Source/core/css/MediaValuesDynamic.cpp
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index 0000000000000000000000000000000000000000..c0d438b31da2f4cd952a520b0975eca54eea2ade
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+++ b/Source/core/css/MediaValuesDynamic.cpp
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+// Copyright 2014 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 "config.h"
+#include "core/css/MediaValuesDynamic.h"
+
+#include "core/css/CSSHelper.h"
+#include "core/css/CSSPrimitiveValue.h"
+#include "core/css/CSSToLengthConversionData.h"
+#include "core/rendering/style/RenderStyle.h"
+#include "core/rendering/style/StyleInheritedData.h"
+
+namespace WebCore {
+
+PassRefPtr<MediaValues> MediaValuesDynamic::create(PassRefPtr<LocalFrame> frame, PassRefPtr<RenderStyle> style)
+{
+    return adoptRef(new MediaValuesDynamic(frame, style));
+}
+
+MediaValuesDynamic::MediaValuesDynamic(PassRefPtr<LocalFrame> frame, PassRefPtr<RenderStyle> style)
+    : m_style(style)
+    , m_frame(frame)
+{
+}
+
+PassRefPtr<MediaValues> MediaValuesDynamic::copy() const
+{
+    return adoptRef(new MediaValuesDynamic(m_frame, m_style));
+}
+
+bool MediaValuesDynamic::computeLength(CSSPrimitiveValue& primitiveValue, int& result) const
+{
+    ASSERT(m_style.get());
+    result = primitiveValue.computeLength<int>(CSSToLengthConversionData(m_style.get(), m_style.get(), 0, 1.0 /* zoom */, true /* computingFontSize */));
+    return true;
+}
+
+bool MediaValuesDynamic::isSafeToSendToAnotherThread() const
+{
+    return false;
+}
+
+int MediaValuesDynamic::viewportWidth() const
+{
+    ASSERT(m_style.get());
+    ASSERT(m_frame.get());
+    return calculateViewportWidth(m_frame.get(), m_style.get());
+}
+
+int MediaValuesDynamic::viewportHeight() const
+{
+    ASSERT(m_style.get());
+    ASSERT(m_frame.get());
+    return calculateViewportHeight(m_frame.get(), m_style.get());
+}
+
+int MediaValuesDynamic::deviceWidth() const
+{
+    ASSERT(m_frame.get());
+    return calculateDeviceWidth(m_frame.get());
+}
+
+int MediaValuesDynamic::deviceHeight() const
+{
+    ASSERT(m_frame.get());
+    return calculateDeviceHeight(m_frame.get());
+}
+
+float MediaValuesDynamic::devicePixelRatio() const
+{
+    ASSERT(m_frame.get());
+    return calculateDevicePixelRatio(m_frame.get());
+}
+
+int MediaValuesDynamic::colorBitsPerComponent() const
+{
+    ASSERT(m_frame.get());
+    return calculateColorBitsPerComponent(m_frame.get());
+}
+
+int MediaValuesDynamic::monochromeBitsPerComponent() const
+{
+    ASSERT(m_frame.get());
+    return calculateMonochromeBitsPerComponent(m_frame.get());
+}
+
+MediaValues::PointerDeviceType MediaValuesDynamic::pointer() const
+{
+    ASSERT(m_frame.get());
+    return calculateLeastCapablePrimaryPointerDeviceType(m_frame.get());
+}
+
+bool MediaValuesDynamic::threeDEnabled() const
+{
+    ASSERT(m_frame.get());
+    return calculateThreeDEnabled(m_frame.get());
+}
+
+bool MediaValuesDynamic::scanMediaType() const
+{
+    ASSERT(m_frame.get());
+    return calculateScanMediaType(m_frame.get());
+}
+
+bool MediaValuesDynamic::screenMediaType() const
+{
+    ASSERT(m_frame.get());
+    return calculateScreenMediaType(m_frame.get());
+}
+
+bool MediaValuesDynamic::printMediaType() const
+{
+    ASSERT(m_frame.get());
+    return calculatePrintMediaType(m_frame.get());
+}
+
+bool MediaValuesDynamic::strictMode() const
+{
+    ASSERT(m_frame.get());
+    return calculateStrictMode(m_frame.get());
+}
+
+Document* MediaValuesDynamic::document() const
+{
+    ASSERT(m_frame.get());
+    return m_frame->document();
+}
+
+bool MediaValuesDynamic::hasValues() const
+{
+    return(m_style.get() && m_frame.get());
+}
+
+} // namespace