/*
* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "RenderRuby.h"
#include "RenderRubyRun.h"
#include "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) ? static_cast<RenderBlock*>(child) : 0;
}
static inline RenderBlock* rubyAfterBlock(const RenderObject* ruby)
{
RenderObject* child = ruby->lastChild();
return isRubyAfterBlock(child) ? static_cast<RenderBlock*>(child) : 0;
}
static RenderBlock* createAnonymousRubyInlineBlock(RenderObject* ruby)
{
RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyle(ruby->style());
newStyle->setDisplay(INLINE_BLOCK);
RenderBlock* newBlock = new (ruby->renderArena()) RenderBlock(ruby->document() /* anonymous box */);
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() ? static_cast<RenderRubyRun*>(child) : 0;
}
static inline RenderRubyRun* findRubyRunParent(RenderObject* child)
{
while (child && !child->isRubyRun())
child = child->parent();
return static_cast<RenderRubyRun*>(child);
}
//=== ruby as inline object ===
RenderRubyAsInline::RenderRubyAsInline(Node* node)
: RenderInline(node)
{
}
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);
}
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(Node* node)
: RenderBlock(node)
{
}
RenderRubyAsBlock::~RenderRubyAsBlock()
{
}
void RenderRubyAsBlock::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderBlock::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
RenderBlock::addChild(child, firstChild());
} else {
// Wrap non-inline content with an anonymous inline-block.
RenderBlock* beforeBlock = rubyBeforeBlock(this);
if (!beforeBlock) {
beforeBlock = createAnonymousRubyInlineBlock(this);
RenderBlock::addChild(beforeBlock, firstChild());
}
beforeBlock->addChild(child);
}
return;
}
if (child->isAfterContent()) {
if (child->isInline()) {
// Add generated inline content normally
RenderBlock::addChild(child);
} else {
// Wrap non-inline content with an anonymous inline-block.
RenderBlock* afterBlock = rubyAfterBlock(this);
if (!afterBlock) {
afterBlock = createAnonymousRubyInlineBlock(this);
RenderBlock::addChild(afterBlock);
}
afterBlock->addChild(child);
}
return;
}
// If the child is a ruby run, just add it normally.
if (child->isRubyRun()) {
RenderBlock::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);
RenderBlock::addChild(lastRun);
}
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));
RenderBlock::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