Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 100 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/RenderRubyText.cpp b/Source/WebCore/rendering/RenderRubyText.cpp
new file mode 100644
index 000000000..c49b4f694
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+++ b/Source/WebCore/rendering/RenderRubyText.cpp
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+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ * Copyright (C) 2011 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:
+ *
+ *     * 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 "RenderRubyText.h"
+
+using namespace std;
+
+namespace WebCore {
+
+RenderRubyText::RenderRubyText(Node* node)
+    : RenderBlock(node)
+{
+}
+
+RenderRubyText::~RenderRubyText()
+{
+}
+
+bool RenderRubyText::isChildAllowed(RenderObject* child, RenderStyle*) const
+{
+    return child->isInline();
+}
+
+ETextAlign RenderRubyText::textAlignmentForLine(bool endsWithSoftBreak) const
+{
+    ETextAlign textAlign = style()->textAlign();
+    if (textAlign != TAAUTO)
+        return RenderBlock::textAlignmentForLine(endsWithSoftBreak);
+
+    // The default behavior is to allow ruby text to expand if it is shorter than the ruby base.
+    return JUSTIFY;
+}
+
+void RenderRubyText::adjustInlineDirectionLineBounds(int expansionOpportunityCount, float& logicalLeft, float& logicalWidth) const
+{
+    ETextAlign textAlign = style()->textAlign();
+    if (textAlign != TAAUTO)
+        return RenderBlock::adjustInlineDirectionLineBounds(expansionOpportunityCount, logicalLeft, logicalWidth);
+
+    int maxPreferredLogicalWidth = this->maxPreferredLogicalWidth();
+    if (maxPreferredLogicalWidth >= logicalWidth)
+        return;
+
+    // Inset the ruby text by half the inter-ideograph expansion amount, but no more than a full-width
+    // ruby character on each side.
+    float inset = (logicalWidth - maxPreferredLogicalWidth) / (expansionOpportunityCount + 1);
+    if (expansionOpportunityCount)
+        inset = min<float>(2 * style()->fontSize(), inset);
+
+    logicalLeft += inset / 2;
+    logicalWidth -= inset;
+}
+
+bool RenderRubyText::avoidsFloats() const
+{
+    return true;
+}
+
+void RenderRubyText::updateBeforeAfterContent(PseudoId pseudoId)
+{
+    // RenderRubyText manages its own :before and :after content
+    // and is not handled by its anonymous wrappers RenderRubyRun
+    // and RenderRuby. This contrasts with other ruby children, which
+    // are enclosed in RenderRubyBase and hence they are able to
+    // update their :before, :after content (since RenderRubyBase
+    // is not a anonymous wrapper).
+    return children()->updateBeforeAfterContent(this, pseudoId);
+}
+
+} // namespace WebCore