webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 92 insertions, 0 deletions

diff --git a/Source/WebCore/css/CSSToLengthConversionData.cpp b/Source/WebCore/css/CSSToLengthConversionData.cpp
new file mode 100644
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+++ b/Source/WebCore/css/CSSToLengthConversionData.cpp
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+/*
+ * Copyright (C) 2013 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 "CSSToLengthConversionData.h"
+
+#include "RenderStyle.h"
+#include "RenderView.h"
+
+namespace WebCore {
+
+float CSSToLengthConversionData::zoom() const
+{
+    if (m_useEffectiveZoom)
+        return m_style ? m_style->effectiveZoom() : 1;
+    return m_zoom;
+}
+
+double CSSToLengthConversionData::viewportWidthFactor() const
+{
+    if (m_style && !m_computingFontSize)
+        const_cast<RenderStyle*>(m_style)->setHasViewportUnits();
+
+    if (!m_renderView)
+        return 0;
+
+    return m_renderView->viewportSizeForCSSViewportUnits().width() / 100.0;
+}
+
+double CSSToLengthConversionData::viewportHeightFactor() const
+{
+    if (m_style && !m_computingFontSize)
+        const_cast<RenderStyle*>(m_style)->setHasViewportUnits();
+
+    if (!m_renderView)
+        return 0;
+
+    return m_renderView->viewportSizeForCSSViewportUnits().height() / 100.0;
+}
+
+double CSSToLengthConversionData::viewportMinFactor() const
+{
+    if (m_style && !m_computingFontSize)
+        const_cast<RenderStyle*>(m_style)->setHasViewportUnits();
+
+    if (!m_renderView)
+        return 0;
+
+    IntSize viewportSizeForCSSViewportUnits = m_renderView->viewportSizeForCSSViewportUnits();
+    return std::min(viewportSizeForCSSViewportUnits.width(), viewportSizeForCSSViewportUnits.height()) / 100.0;
+}
+
+double CSSToLengthConversionData::viewportMaxFactor() const
+{
+    if (m_style && !m_computingFontSize)
+        const_cast<RenderStyle*>(m_style)->setHasViewportUnits();
+
+    if (!m_renderView)
+        return 0;
+
+    IntSize viewportSizeForCSSViewportUnits = m_renderView->viewportSizeForCSSViewportUnits();
+    return std::max(viewportSizeForCSSViewportUnits.width(), viewportSizeForCSSViewportUnits.height()) / 100.0;
+}
+
+} // namespace WebCore