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

1 files changed, 157 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/RenderRubyBase.cpp b/Source/WebCore/rendering/RenderRubyBase.cpp
new file mode 100644
index 000000000..d62795538
--- /dev/null
+++ b/Source/WebCore/rendering/RenderRubyBase.cpp
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2009 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 "RenderRubyBase.h"
+#include "RenderRubyRun.h"
+#include "RenderRubyText.h"
+
+using namespace std;
+
+namespace WebCore {
+
+RenderRubyBase::RenderRubyBase(Node* node)
+    : RenderBlock(node)
+{
+    setInline(false);
+}
+
+RenderRubyBase::~RenderRubyBase()
+{
+}
+
+bool RenderRubyBase::isChildAllowed(RenderObject* child, RenderStyle*) const
+{
+    return child->isInline();
+}
+
+void RenderRubyBase::moveChildren(RenderRubyBase* toBase, RenderObject* beforeChild)
+{
+    // This function removes all children that are before (!) beforeChild
+    // and appends them to toBase.
+    ASSERT_ARG(toBase, toBase);
+    
+    // First make sure that beforeChild (if set) is indeed a direct child of this.
+    // Inline children might be wrapped in an anonymous block if there's a continuation.
+    // Theoretically, in ruby bases, this can happen with only the first such a child,
+    // so it should be OK to just climb the tree.
+    while (beforeChild && beforeChild->parent() != this)
+        beforeChild = beforeChild->parent();
+
+    if (childrenInline())
+        moveInlineChildren(toBase, beforeChild);
+    else
+        moveBlockChildren(toBase, beforeChild);
+
+    setNeedsLayoutAndPrefWidthsRecalc();
+    toBase->setNeedsLayoutAndPrefWidthsRecalc();
+}
+
+void RenderRubyBase::moveInlineChildren(RenderRubyBase* toBase, RenderObject* beforeChild)
+{
+    ASSERT(childrenInline());
+    ASSERT_ARG(toBase, toBase);
+
+    if (!firstChild())
+        return;
+
+    RenderBlock* toBlock;
+    if (toBase->childrenInline()) {
+        // The standard and easy case: move the children into the target base
+        toBlock = toBase;
+    } else {
+        // We need to wrap the inline objects into an anonymous block.
+        // If toBase has a suitable block, we re-use it, otherwise create a new one.
+        RenderObject* lastChild = toBase->lastChild();
+        if (lastChild && lastChild->isAnonymousBlock() && lastChild->childrenInline())
+            toBlock = toRenderBlock(lastChild);
+        else {
+            toBlock = toBase->createAnonymousBlock();
+            toBase->children()->appendChildNode(toBase, toBlock);
+        }
+    }
+    // Move our inline children into the target block we determined above.
+    moveChildrenTo(toBlock, firstChild(), beforeChild);
+}
+
+void RenderRubyBase::moveBlockChildren(RenderRubyBase* toBase, RenderObject* beforeChild)
+{
+    ASSERT(!childrenInline());
+    ASSERT_ARG(toBase, toBase);
+
+    if (!firstChild())
+        return;
+
+    if (toBase->childrenInline())
+        toBase->makeChildrenNonInline();
+
+    // If an anonymous block would be put next to another such block, then merge those.
+    RenderObject* firstChildHere = firstChild();
+    RenderObject* lastChildThere = toBase->lastChild();
+    if (firstChildHere->isAnonymousBlock() && firstChildHere->childrenInline() 
+            && lastChildThere && lastChildThere->isAnonymousBlock() && lastChildThere->childrenInline()) {            
+        RenderBlock* anonBlockHere = toRenderBlock(firstChildHere);
+        RenderBlock* anonBlockThere = toRenderBlock(lastChildThere);
+        anonBlockHere->moveAllChildrenTo(anonBlockThere, anonBlockThere->children());
+        anonBlockHere->deleteLineBoxTree();
+        anonBlockHere->destroy();
+    }
+    // Move all remaining children normally.
+    moveChildrenTo(toBase, firstChild(), beforeChild);
+}
+
+RenderRubyRun* RenderRubyBase::rubyRun() const
+{
+    ASSERT(parent());
+    ASSERT(parent()->isRubyRun());
+
+    return toRenderRubyRun(parent());
+}
+
+ETextAlign RenderRubyBase::textAlignmentForLine(bool /* endsWithSoftBreak */) const
+{
+    return JUSTIFY;
+}
+
+void RenderRubyBase::adjustInlineDirectionLineBounds(int expansionOpportunityCount, float& logicalLeft, float& logicalWidth) const
+{
+    int maxPreferredLogicalWidth = this->maxPreferredLogicalWidth();
+    if (maxPreferredLogicalWidth >= logicalWidth)
+        return;
+
+    // Inset the ruby base by half the inter-ideograph expansion amount.
+    float inset = (logicalWidth - maxPreferredLogicalWidth) / (expansionOpportunityCount + 1);
+
+    logicalLeft += inset / 2;
+    logicalWidth -= inset;
+}
+
+} // namespace WebCore