src/third_party/WebKit/Source/core/rendering/RenderRubyBase.cpp

   1 /*
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   6  * met:
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   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
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  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32
  33 #include "core/rendering/RenderRubyBase.h"
  34 #include "core/rendering/RenderRubyRun.h"
  35
  36 namespace blink {
  37
  38 RenderRubyBase::RenderRubyBase()
  39     : RenderBlockFlow(0)
  40 {
  41     setInline(false);
  42 }
  43
  44 RenderRubyBase::~RenderRubyBase()
  45 {
  46 }
  47
  48 RenderRubyBase* RenderRubyBase::createAnonymous(Document* document)
  49 {
  50     RenderRubyBase* renderer = new RenderRubyBase();
  51     renderer->setDocumentForAnonymous(document);
  52     return renderer;
  53 }
  54
  55 bool RenderRubyBase::isChildAllowed(RenderObject* child, RenderStyle*) const
  56 {
  57     return child->isInline();
  58 }
  59
  60 void RenderRubyBase::moveChildren(RenderRubyBase* toBase, RenderObject* beforeChild)
  61 {
  62     // This function removes all children that are before (!) beforeChild
  63     // and appends them to toBase.
  64     ASSERT_ARG(toBase, toBase);
  65
  66     if (beforeChild && beforeChild->parent() != this)
  67         beforeChild = splitAnonymousBoxesAroundChild(beforeChild);
  68
  69     if (childrenInline())
  70         moveInlineChildren(toBase, beforeChild);
  71     else
  72         moveBlockChildren(toBase, beforeChild);
  73
  74     setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
  75     toBase->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
  76 }
  77
  78 void RenderRubyBase::moveInlineChildren(RenderRubyBase* toBase, RenderObject* beforeChild)
  79 {
  80     ASSERT(childrenInline());
  81     ASSERT_ARG(toBase, toBase);
  82
  83     if (!firstChild())
  84         return;
  85
  86     RenderBlock* toBlock;
  87     if (toBase->childrenInline()) {
  88         // The standard and easy case: move the children into the target base
  89         toBlock = toBase;
  90     } else {
  91         // We need to wrap the inline objects into an anonymous block.
  92         // If toBase has a suitable block, we re-use it, otherwise create a new one.
  93         RenderObject* lastChild = toBase->lastChild();
  94         if (lastChild && lastChild->isAnonymousBlock() && lastChild->childrenInline())
  95             toBlock = toRenderBlock(lastChild);
  96         else {
  97             toBlock = toBase->createAnonymousBlock();
  98             toBase->children()->appendChildNode(toBase, toBlock);
  99         }
 100     }
 101     // Move our inline children into the target block we determined above.
 102     moveChildrenTo(toBlock, firstChild(), beforeChild);
 103 }
 104
 105 void RenderRubyBase::moveBlockChildren(RenderRubyBase* toBase, RenderObject* beforeChild)
 106 {
 107     ASSERT(!childrenInline());
 108     ASSERT_ARG(toBase, toBase);
 109
 110     if (!firstChild())
 111         return;
 112
 113     if (toBase->childrenInline())
 114         toBase->makeChildrenNonInline();
 115
 116     // If an anonymous block would be put next to another such block, then merge those.
 117     RenderObject* firstChildHere = firstChild();
 118     RenderObject* lastChildThere = toBase->lastChild();
 119     if (firstChildHere->isAnonymousBlock() && firstChildHere->childrenInline()
 120             && lastChildThere && lastChildThere->isAnonymousBlock() && lastChildThere->childrenInline()) {
 121         RenderBlock* anonBlockHere = toRenderBlock(firstChildHere);
 122         RenderBlock* anonBlockThere = toRenderBlock(lastChildThere);
 123         anonBlockHere->moveAllChildrenTo(anonBlockThere, anonBlockThere->children());
 124         anonBlockHere->deleteLineBoxTree();
 125         anonBlockHere->destroy();
 126     }
 127     // Move all remaining children normally.
 128     moveChildrenTo(toBase, firstChild(), beforeChild);
 129 }
 130
 131 ETextAlign RenderRubyBase::textAlignmentForLine(bool /* endsWithSoftBreak */) const
 132 {
 133     return JUSTIFY;
 134 }
 135
 136 void RenderRubyBase::adjustInlineDirectionLineBounds(unsigned expansionOpportunityCount, float& logicalLeft, float& logicalWidth) const
 137 {
 138     int maxPreferredLogicalWidth = this->maxPreferredLogicalWidth();
 139     if (maxPreferredLogicalWidth >= logicalWidth)
 140         return;
 141
 142     // Inset the ruby base by half the inter-ideograph expansion amount.
 143     float inset = (logicalWidth - maxPreferredLogicalWidth) / (expansionOpportunityCount + 1);
 144
 145     logicalLeft += inset / 2;
 146     logicalWidth -= inset;
 147 }
 148
 149 } // namespace blink