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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_LAZY_SOURCE_LOCATION_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_LAZY_SOURCE_LOCATION_H_
#include <variant>
#include "third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "v8/include/v8.h"
namespace blink {
// A location in JS source code that performs a lazy conversion of the URL
// string from a v8::String to a Blink String. This class is designed to be
// used specifically in scenarios where the URL may not be retrieved, improving
// performance by deferring the string conversion and allocation.
class PLATFORM_EXPORT LazySourceLocation final
: public GarbageCollected<LazySourceLocation> {
public:
LazySourceLocation();
LazySourceLocation(const String& url);
LazySourceLocation(v8::Isolate* isolate,
v8::Local<v8::String> url,
int char_position);
LazySourceLocation(v8::Isolate* isolate,
v8::Local<v8::String> url,
int char_position,
int line_number,
int column_number);
~LazySourceLocation();
// This enables lazy conversion of script URLs for performance.
static LazySourceLocation* FromCurrentStack(v8::Isolate* isolate);
const String& Url(v8::Isolate* isolate) const;
int CharPosition() const { return char_position_; }
int LineNumber() const { return line_number_; }
int ColumnNumber() const { return column_number_; }
void Trace(Visitor* visitor) const;
private:
mutable std::variant<String, TraceWrapperV8Reference<v8::String>> url_;
int char_position_ = -1;
int line_number_ = 0;
int column_number_ = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_LAZY_SOURCE_LOCATION_H_
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