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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_LAYOUT_ANONYMOUS_BLOCK_BOX_H_
#define COBALT_LAYOUT_ANONYMOUS_BLOCK_BOX_H_
#include <vector>
#include "cobalt/dom/font_list.h"
#include "cobalt/layout/base_direction.h"
#include "cobalt/layout/block_container_box.h"
#include "cobalt/layout/box.h"
namespace cobalt {
namespace layout {
// A block-level block container box that establish an inline formatting
// context. Anonymous block boxes are created to enclose inline-level
// children in a block formatting context.
// https://www.w3.org/TR/CSS21/visuren.html#anonymous-block-level
class AnonymousBlockBox : public BlockContainerBox {
public:
AnonymousBlockBox(const scoped_refptr<cssom::CSSComputedStyleDeclaration>&
css_computed_style_declaration,
BaseDirection base_direction,
UsedStyleProvider* used_style_provider,
LayoutStatTracker* layout_stat_tracker);
// From |Box|.
Level GetLevel() const override;
AnonymousBlockBox* AsAnonymousBlockBox() override;
const AnonymousBlockBox* AsAnonymousBlockBox() const override;
void SplitBidiLevelRuns() override;
bool HasTrailingLineBreak() const override;
void RenderAndAnimateContent(
render_tree::CompositionNode::Builder* border_node_builder,
ContainerBox* stacking_context) const override;
// From |ContainerBox|.
// This method should never be called, instead all children have to be added
// through |AddInlineLevelChild|.
bool TryAddChild(const scoped_refptr<Box>& child_box) override;
// Rest of the public methods.
// An anonymous block box may only contain inline-level children.
void AddInlineLevelChild(const scoped_refptr<Box>& child_box);
protected:
// From |Box|.
#ifdef COBALT_BOX_DUMP_ENABLED
void DumpClassName(std::ostream* stream) const override;
#endif // COBALT_BOX_DUMP_ENABLED
// From |BlockContainerBox|.
scoped_ptr<FormattingContext> UpdateRectOfInFlowChildBoxes(
const LayoutParams& child_layout_params) override;
private:
bool AreEllipsesEnabled() const;
typedef std::vector<math::Vector2dF> EllipsesCoordinates;
// A font used for text width and line height calculations.
const scoped_refptr<dom::FontList> used_font_;
// The XY coordinates of all ellipses placed while laying out the anonymous
// block box within an inline formatting context.
EllipsesCoordinates ellipses_coordinates_;
};
} // namespace layout
} // namespace cobalt
#endif // COBALT_LAYOUT_ANONYMOUS_BLOCK_BOX_H_