1 /* 2 * Copyright (C) 2009 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 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. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 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 150