| /* |
| * 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 "third_party/blink/renderer/core/layout/layout_ruby.h" |
| |
| #include "third_party/blink/renderer/core/frame/use_counter.h" |
| #include "third_party/blink/renderer/core/layout/layout_ruby_run.h" |
| |
| namespace blink { |
| |
| // === generic helper functions to avoid excessive code duplication === |
| |
| static LayoutRubyRun* LastRubyRun(const LayoutObject* ruby) { |
| LayoutObject* child = ruby->SlowLastChild(); |
| DCHECK(!child || child->IsRubyRun()); |
| return ToLayoutRubyRun(child); |
| } |
| |
| static inline LayoutRubyRun* FindRubyRunParent(LayoutObject* child) { |
| while (child && !child->IsRubyRun()) |
| child = child->Parent(); |
| return ToLayoutRubyRun(child); |
| } |
| |
| // === ruby as inline object === |
| |
| LayoutRubyAsInline::LayoutRubyAsInline(Element* element) |
| : LayoutInline(element) { |
| UseCounter::Count(GetDocument(), WebFeature::kRenderRuby); |
| } |
| |
| LayoutRubyAsInline::~LayoutRubyAsInline() = default; |
| |
| void LayoutRubyAsInline::StyleDidChange(StyleDifference diff, |
| const ComputedStyle* old_style) { |
| LayoutInline::StyleDidChange(diff, old_style); |
| PropagateStyleToAnonymousChildren(); |
| } |
| |
| void LayoutRubyAsInline::AddChild(LayoutObject* child, |
| LayoutObject* before_child) { |
| // If the child is a ruby run, just add it normally. |
| if (child->IsRubyRun()) { |
| LayoutInline::AddChild(child, before_child); |
| return; |
| } |
| |
| if (before_child) { |
| // insert child into run |
| LayoutObject* run = before_child; |
| while (run && !run->IsRubyRun()) |
| run = run->Parent(); |
| if (run) { |
| if (before_child == run) |
| before_child = ToLayoutRubyRun(before_child)->FirstChild(); |
| DCHECK(!before_child || before_child->IsDescendantOf(run)); |
| run->AddChild(child, before_child); |
| return; |
| } |
| NOTREACHED(); // 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 LayoutRubyRun object will handle the details) |
| LayoutRubyRun* last_run = LastRubyRun(this); |
| if (!last_run || last_run->HasRubyText()) { |
| last_run = LayoutRubyRun::StaticCreateRubyRun(this); |
| LayoutInline::AddChild(last_run, before_child); |
| } |
| last_run->AddChild(child); |
| } |
| |
| void LayoutRubyAsInline::RemoveChild(LayoutObject* child) { |
| // If the child's parent is *this (must be a ruby run), just use the normal |
| // remove method. |
| if (child->Parent() == this) { |
| DCHECK(child->IsRubyRun()); |
| LayoutInline::RemoveChild(child); |
| return; |
| } |
| |
| // Otherwise find the containing run and remove it from there. |
| LayoutRubyRun* run = FindRubyRunParent(child); |
| DCHECK(run); |
| run->RemoveChild(child); |
| } |
| |
| // === ruby as block object === |
| |
| LayoutRubyAsBlock::LayoutRubyAsBlock(Element* element) |
| : LayoutBlockFlow(element) { |
| UseCounter::Count(GetDocument(), WebFeature::kRenderRuby); |
| } |
| |
| LayoutRubyAsBlock::~LayoutRubyAsBlock() = default; |
| |
| void LayoutRubyAsBlock::StyleDidChange(StyleDifference diff, |
| const ComputedStyle* old_style) { |
| LayoutBlockFlow::StyleDidChange(diff, old_style); |
| PropagateStyleToAnonymousChildren(); |
| } |
| |
| void LayoutRubyAsBlock::AddChild(LayoutObject* child, |
| LayoutObject* before_child) { |
| // If the child is a ruby run, just add it normally. |
| if (child->IsRubyRun()) { |
| LayoutBlockFlow::AddChild(child, before_child); |
| return; |
| } |
| |
| if (before_child) { |
| // insert child into run |
| LayoutObject* run = before_child; |
| while (run && !run->IsRubyRun()) |
| run = run->Parent(); |
| if (run) { |
| if (before_child == run) |
| before_child = ToLayoutRubyRun(before_child)->FirstChild(); |
| DCHECK(!before_child || before_child->IsDescendantOf(run)); |
| run->AddChild(child, before_child); |
| return; |
| } |
| NOTREACHED(); // 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 LayoutRubyRun object will handle the details) |
| LayoutRubyRun* last_run = LastRubyRun(this); |
| if (!last_run || last_run->HasRubyText()) { |
| last_run = LayoutRubyRun::StaticCreateRubyRun(this); |
| LayoutBlockFlow::AddChild(last_run, before_child); |
| } |
| last_run->AddChild(child); |
| } |
| |
| void LayoutRubyAsBlock::RemoveChild(LayoutObject* child) { |
| // If the child's parent is *this (must be a ruby run), just use the normal |
| // remove method. |
| if (child->Parent() == this) { |
| DCHECK(child->IsRubyRun()); |
| LayoutBlockFlow::RemoveChild(child); |
| return; |
| } |
| |
| // Otherwise find the containing run and remove it from there. |
| LayoutRubyRun* run = FindRubyRunParent(child); |
| DCHECK(run); |
| run->RemoveChild(child); |
| } |
| |
| } // namespace blink |