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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/layout/ng/ng_break_token.h"
#include "third_party/blink/renderer/core/layout/ng/ng_block_break_token.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
namespace blink {
namespace {
struct SameSizeAsNGBreakToken : RefCounted<NGBreakToken> {
virtual ~SameSizeAsNGBreakToken() = default;
void* pointer;
unsigned flags;
};
static_assert(sizeof(NGBreakToken) == sizeof(SameSizeAsNGBreakToken),
"NGBreakToken should stay small");
} // namespace
#if DCHECK_IS_ON()
namespace {
void AppendBreakTokenToString(const NGBreakToken* token,
StringBuilder* string_builder,
unsigned indent = 2) {
if (!token)
return;
DCHECK(string_builder);
for (unsigned i = 0; i < indent; i++)
string_builder->Append(" ");
string_builder->Append(token->ToString());
string_builder->Append("\n");
if (auto* block_break_token = DynamicTo<NGBlockBreakToken>(token)) {
const auto children = block_break_token->ChildBreakTokens();
for (const auto* child : children)
AppendBreakTokenToString(child, string_builder, indent + 2);
}
}
} // namespace
String NGBreakToken::ToString() const {
StringBuilder string_builder;
string_builder.Append("(");
string_builder.Append(InputNode().ToString());
string_builder.Append(")");
if (IsFinished())
string_builder.Append(" finished");
return string_builder.ToString();
}
void NGBreakToken::ShowBreakTokenTree() const {
StringBuilder string_builder;
string_builder.Append(".:: LayoutNG Break Token Tree ::.\n");
AppendBreakTokenToString(this, &string_builder);
fprintf(stderr, "%s\n", string_builder.ToString().Utf8().c_str());
}
#endif // DCHECK_IS_ON()
} // namespace blink
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