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
36namespace blink {
37
38RenderRubyBase::RenderRubyBase()
39    : RenderBlockFlow(0)
40{
41    setInline(false);
42}
43
44RenderRubyBase::~RenderRubyBase()
45{
46}
47
48RenderRubyBase* RenderRubyBase::createAnonymous(Document* document)
49{
50    RenderRubyBase* renderer = new RenderRubyBase();
51    renderer->setDocumentForAnonymous(document);
52    return renderer;
53}
54
55bool RenderRubyBase::isChildAllowed(RenderObject* child, RenderStyle*) const
56{
57    return child->isInline();
58}
59
60void 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
78void 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
105void 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
131ETextAlign RenderRubyBase::textAlignmentForLine(bool /* endsWithSoftBreak */) const
132{
133    return JUSTIFY;
134}
135
136void 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