flexible_box_algorithm.h | Explore in Territory

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
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 * modification, are permitted provided that the following conditions are
 * met:
 *
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 * 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
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 */

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_FLEX_FLEXIBLE_BOX_ALGORITHM_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_FLEX_FLEXIBLE_BOX_ALGORITHM_H_

#include "base/check_op.h"
#include "third_party/blink/renderer/core/layout/baseline_utils.h"
#include "third_party/blink/renderer/core/layout/block_node.h"
#include "third_party/blink/renderer/core/layout/geometry/flex_offset.h"
#include "third_party/blink/renderer/core/layout/layout_result.h"
#include "third_party/blink/renderer/core/layout/min_max_sizes.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
#include "third_party/blink/renderer/platform/geometry/layout_unit.h"
#include "third_party/blink/renderer/platform/geometry/physical_direction.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"

namespace blink {

class FlexItem;
class FlexLayoutAlgorithm;
class FlexLine;
class FlexibleBoxAlgorithm;
struct MinMaxSizes;
struct NGFlexLine;

enum FlexSign { … };

FlexItemVector;

class FlexItem { … };

class FlexItemVectorView { … };

class FlexLine { … };

// This class implements the CSS Flexbox layout algorithm:
//   https://drafts.csswg.org/css-flexbox/
//
// Expected usage is as follows:
//     FlexibleBoxAlgorithm algorithm(Style(), MainAxisLength());
//     for (each child) {
//       algorithm.emplace_back(...caller must compute these values...)
//     }
//     LayoutUnit cross_axis_offset = border + padding;
//     while ((FlexLine* line = algorithm.ComputenextLine(LogicalWidth()))) {
//       // Compute main axis size, using sum_hypothetical_main_size if
//       // indefinite
//       line->SetContainerMainInnerSize(MainAxisSize(
//           line->sum_hypothetical_main_size));
//        line->FreezeInflexibleItems();
//        while (!current_line->ResolveFlexibleLengths()) { continue; }
//        // Now, lay out the items, forcing their main axis size to
//        // item.flexed_content_size
//        LayoutUnit main_axis_offset = border + padding + scrollbar;
//        line->ComputeLineItemsPosition(main_axis_offset, cross_axis_offset);
//     }
// The final position of each flex item is in item.offset
class CORE_EXPORT FlexibleBoxAlgorithm { … };

}  // namespace blink

WTF_ALLOW_CLEAR_UNUSED_SLOTS_WITH_MEM_FUNCTIONS(…)

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_FLEX_FLEXIBLE_BOX_ALGORITHM_H_
chromium/third_party/blink/renderer/core/layout/flex/flexible_box_algorithm.h
