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// Copyright 2018 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_JS_EVENT_HANDLER_FOR_CONTENT_ATTRIBUTE_H_
#define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_JS_EVENT_HANDLER_FOR_CONTENT_ATTRIBUTE_H_
#include "third_party/blink/renderer/bindings/core/v8/js_event_handler.h"
#include "third_party/blink/renderer/platform/wtf/text/text_position.h"
namespace blink {
// |JSEventHandlerForContentAttribute| supports lazy compilation for content
// attribute. This performs in the same way as |JSEventHandler| after it gets
// compiled.
class JSEventHandlerForContentAttribute final : public JSEventHandler {
public:
static JSEventHandlerForContentAttribute* Create(
const AtomicString& function_name,
const String& code,
const String& source_url,
const TextPosition& position,
v8::Isolate* isolate,
DOMWrapperWorld& world,
HandlerType type = HandlerType::kEventHandler) {
return new JSEventHandlerForContentAttribute(
isolate, world, function_name, code, source_url, position, type);
}
// blink::EventListener overrides:
bool IsEventHandlerForContentAttribute() const override { return true; }
// blink::JSBasedEventListener overrides:
v8::Local<v8::Value> GetListenerObject(EventTarget&) override;
std::unique_ptr<SourceLocation> GetSourceLocation(EventTarget&) override;
const String& Code() const override { return code_; }
protected:
// blink::JSBasedEventListener override:
v8::Isolate* GetIsolate() const override { return isolate_; }
ScriptState* GetScriptState() const override {
DCHECK(HasCompiledHandler());
return JSEventHandler::GetScriptState();
}
DOMWrapperWorld& GetWorld() const override { return *world_; }
private:
JSEventHandlerForContentAttribute(v8::Isolate* isolate,
DOMWrapperWorld& world,
const AtomicString& function_name,
const String& code,
const String& source_url,
const TextPosition& position,
HandlerType type)
: JSEventHandler(type),
did_compile_(false),
function_name_(function_name),
code_(code),
source_url_(source_url),
position_(position),
isolate_(isolate),
world_(&world) {}
// Implements Step 3. of "get the current value of the event handler".
// The compiled v8::Function is returned and |JSEventHandler::event_handler_|
// gets initialized with it if lazy compilation succeeds.
// Otherwise, v8::Null is returned.
// https://html.spec.whatwg.org/multipage/webappapis.html#getting-the-current-value-of-the-event-handler
v8::Local<v8::Value> GetCompiledHandler(EventTarget&);
// Lazy compilation for content attribute should be tried only once, but we
// cannot see whether it had never tried to compile or it has already failed
// when |HasCompiledHandler()| returns false. |did_compile_| is used for
// checking that.
bool did_compile_;
const AtomicString function_name_;
String code_;
String source_url_;
TextPosition position_;
v8::Isolate* isolate_;
scoped_refptr<DOMWrapperWorld> world_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_JS_EVENT_HANDLER_FOR_CONTENT_ATTRIBUTE_H_
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