root/Source/core/rendering/RenderRuby.cpp

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DEFINITIONS

This source file includes following definitions.
  1. isAnonymousRubyInlineBlock
  2. isRubyBeforeBlock
  3. isRubyAfterBlock
  4. rubyBeforeBlock
  5. rubyAfterBlock
  6. createAnonymousRubyInlineBlock
  7. lastRubyRun
  8. findRubyRunParent
  9. styleDidChange
  10. addChild
  11. removeChild
  12. styleDidChange
  13. addChild
  14. removeChild

/*
 * 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 "core/rendering/RenderRuby.h"

#include "core/rendering/RenderRubyRun.h"
#include "core/rendering/style/RenderStyle.h"
#include "wtf/RefPtr.h"

namespace WebCore {

//=== generic helper functions to avoid excessive code duplication ===

static inline bool isAnonymousRubyInlineBlock(const RenderObject* object)
{
    ASSERT(!object
        || !object->parent()->isRuby()
        || object->isRubyRun()
        || (object->isInline() && (object->isBeforeContent() || object->isAfterContent()))
        || (object->isAnonymous() && object->isRenderBlock() && object->style()->display() == INLINE_BLOCK));

    return object
        && object->parent()->isRuby()
        && object->isRenderBlock()
        && !object->isRubyRun();
}

static inline bool isRubyBeforeBlock(const RenderObject* object)
{
    return isAnonymousRubyInlineBlock(object)
        && !object->previousSibling()
        && object->firstChild()
        && object->firstChild()->style()->styleType() == BEFORE;
}

static inline bool isRubyAfterBlock(const RenderObject* object)
{
    return isAnonymousRubyInlineBlock(object)
        && !object->nextSibling()
        && object->firstChild()
        && object->firstChild()->style()->styleType() == AFTER;
}

static inline RenderBlock* rubyBeforeBlock(const RenderObject* ruby)
{
    RenderObject* child = ruby->firstChild();
    return isRubyBeforeBlock(child) ? toRenderBlock(child) : 0;
}

static inline RenderBlock* rubyAfterBlock(const RenderObject* ruby)
{
    RenderObject* child = ruby->lastChild();
    return isRubyAfterBlock(child) ? toRenderBlock(child) : 0;
}

static RenderBlockFlow* createAnonymousRubyInlineBlock(RenderObject* ruby)
{
    RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyleWithDisplay(ruby->style(), INLINE_BLOCK);
    RenderBlockFlow* newBlock = RenderBlockFlow::createAnonymous(&ruby->document());
    newBlock->setStyle(newStyle.release());
    return newBlock;
}

static RenderRubyRun* lastRubyRun(const RenderObject* ruby)
{
    RenderObject* child = ruby->lastChild();
    if (child && !child->isRubyRun())
        child = child->previousSibling();
    ASSERT(!child || child->isRubyRun() || child->isBeforeContent() || child == rubyBeforeBlock(ruby));
    return child && child->isRubyRun() ? toRenderRubyRun(child) : 0;
}

static inline RenderRubyRun* findRubyRunParent(RenderObject* child)
{
    while (child && !child->isRubyRun())
        child = child->parent();
    return toRenderRubyRun(child);
}

//=== ruby as inline object ===

RenderRubyAsInline::RenderRubyAsInline(Element* element)
    : RenderInline(element)
{
}

RenderRubyAsInline::~RenderRubyAsInline()
{
}

void RenderRubyAsInline::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
    RenderInline::styleDidChange(diff, oldStyle);
    propagateStyleToAnonymousChildren();
}

void RenderRubyAsInline::addChild(RenderObject* child, RenderObject* beforeChild)
{
    // Insert :before and :after content before/after the RenderRubyRun(s)
    if (child->isBeforeContent()) {
        if (child->isInline()) {
            // Add generated inline content normally
            RenderInline::addChild(child, firstChild());
        } else {
            // Wrap non-inline content with an anonymous inline-block.
            RenderBlock* beforeBlock = rubyBeforeBlock(this);
            if (!beforeBlock) {
                beforeBlock = createAnonymousRubyInlineBlock(this);
                RenderInline::addChild(beforeBlock, firstChild());
            }
            beforeBlock->addChild(child);
        }
        return;
    }
    if (child->isAfterContent()) {
        if (child->isInline()) {
            // Add generated inline content normally
            RenderInline::addChild(child);
        } else {
            // Wrap non-inline content with an anonymous inline-block.
            RenderBlock* afterBlock = rubyAfterBlock(this);
            if (!afterBlock) {
                afterBlock = createAnonymousRubyInlineBlock(this);
                RenderInline::addChild(afterBlock);
            }
            afterBlock->addChild(child);
        }
        return;
    }

    // If the child is a ruby run, just add it normally.
    if (child->isRubyRun()) {
        RenderInline::addChild(child, beforeChild);
        return;
    }

    if (beforeChild && !isAfterContent(beforeChild)) {
        // insert child into run
        ASSERT(!beforeChild->isRubyRun());
        RenderObject* run = beforeChild;
        while (run && !run->isRubyRun())
            run = run->parent();
        if (run) {
            run->addChild(child, beforeChild);
            return;
        }
        ASSERT_NOT_REACHED(); // beforeChild should always have a run as parent!
        // Emergency fallback: fall through and just append.
    }

    // If the new child would be appended, try to add the child to the previous run
    // if possible, or create a new run otherwise.
    // (The RenderRubyRun object will handle the details)
    RenderRubyRun* lastRun = lastRubyRun(this);
    if (!lastRun || lastRun->hasRubyText()) {
        lastRun = RenderRubyRun::staticCreateRubyRun(this);
        RenderInline::addChild(lastRun, beforeChild);
    }
    lastRun->addChild(child);
}

void RenderRubyAsInline::removeChild(RenderObject* child)
{
    // If the child's parent is *this (must be a ruby run or generated content or anonymous block),
    // just use the normal remove method.
    if (child->parent() == this) {
        ASSERT(child->isRubyRun() || child->isBeforeContent() || child->isAfterContent() || isAnonymousRubyInlineBlock(child));
        RenderInline::removeChild(child);
        return;
    }
    // If the child's parent is an anoymous block (must be generated :before/:after content)
    // just use the block's remove method.
    if (isAnonymousRubyInlineBlock(child->parent())) {
        ASSERT(child->isBeforeContent() || child->isAfterContent());
        child->parent()->removeChild(child);
        removeChild(child->parent());
        return;
    }

    // Otherwise find the containing run and remove it from there.
    RenderRubyRun* run = findRubyRunParent(child);
    ASSERT(run);
    run->removeChild(child);
}

//=== ruby as block object ===

RenderRubyAsBlock::RenderRubyAsBlock(Element* element)
    : RenderBlockFlow(element)
{
}

RenderRubyAsBlock::~RenderRubyAsBlock()
{
}

void RenderRubyAsBlock::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
    RenderBlockFlow::styleDidChange(diff, oldStyle);
    propagateStyleToAnonymousChildren();
}

void RenderRubyAsBlock::addChild(RenderObject* child, RenderObject* beforeChild)
{
    // Insert :before and :after content before/after the RenderRubyRun(s)
    if (child->isBeforeContent()) {
        if (child->isInline()) {
            // Add generated inline content normally
            RenderBlockFlow::addChild(child, firstChild());
        } else {
            // Wrap non-inline content with an anonymous inline-block.
            RenderBlock* beforeBlock = rubyBeforeBlock(this);
            if (!beforeBlock) {
                beforeBlock = createAnonymousRubyInlineBlock(this);
                RenderBlockFlow::addChild(beforeBlock, firstChild());
            }
            beforeBlock->addChild(child);
        }
        return;
    }
    if (child->isAfterContent()) {
        if (child->isInline()) {
            // Add generated inline content normally
            RenderBlockFlow::addChild(child);
        } else {
            // Wrap non-inline content with an anonymous inline-block.
            RenderBlock* afterBlock = rubyAfterBlock(this);
            if (!afterBlock) {
                afterBlock = createAnonymousRubyInlineBlock(this);
                RenderBlockFlow::addChild(afterBlock);
            }
            afterBlock->addChild(child);
        }
        return;
    }

    // If the child is a ruby run, just add it normally.
    if (child->isRubyRun()) {
        RenderBlockFlow::addChild(child, beforeChild);
        return;
    }

    if (beforeChild && !isAfterContent(beforeChild)) {
        // insert child into run
        ASSERT(!beforeChild->isRubyRun());
        RenderObject* run = beforeChild;
        while (run && !run->isRubyRun())
            run = run->parent();
        if (run) {
            run->addChild(child, beforeChild);
            return;
        }
        ASSERT_NOT_REACHED(); // beforeChild should always have a run as parent!
        // Emergency fallback: fall through and just append.
    }

    // If the new child would be appended, try to add the child to the previous run
    // if possible, or create a new run otherwise.
    // (The RenderRubyRun object will handle the details)
    RenderRubyRun* lastRun = lastRubyRun(this);
    if (!lastRun || lastRun->hasRubyText()) {
        lastRun = RenderRubyRun::staticCreateRubyRun(this);
        RenderBlockFlow::addChild(lastRun, beforeChild);
    }
    lastRun->addChild(child);
}

void RenderRubyAsBlock::removeChild(RenderObject* child)
{
    // If the child's parent is *this (must be a ruby run or generated content or anonymous block),
    // just use the normal remove method.
    if (child->parent() == this) {
        ASSERT(child->isRubyRun() || child->isBeforeContent() || child->isAfterContent() || isAnonymousRubyInlineBlock(child));
        RenderBlockFlow::removeChild(child);
        return;
    }
    // If the child's parent is an anoymous block (must be generated :before/:after content)
    // just use the block's remove method.
    if (isAnonymousRubyInlineBlock(child->parent())) {
        ASSERT(child->isBeforeContent() || child->isAfterContent());
        child->parent()->removeChild(child);
        removeChild(child->parent());
        return;
    }

    // Otherwise find the containing run and remove it from there.
    RenderRubyRun* run = findRubyRunParent(child);
    ASSERT(run);
    run->removeChild(child);
}

} // namespace WebCore

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