392 lines
12 KiB
C++
392 lines
12 KiB
C++
// Copyright (c) 2013 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#ifndef CEF_LIBCEF_RENDERER_V8_IMPL_H_
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#define CEF_LIBCEF_RENDERER_V8_IMPL_H_
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#pragma once
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#include <vector>
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#include "include/cef_v8.h"
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#include "libcef/common/tracker.h"
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#include "v8/include/v8.h"
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#include "base/location.h"
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#include "base/logging.h"
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#include "base/memory/ref_counted.h"
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#include "base/sequenced_task_runner.h"
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class CefTrackNode;
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class GURL;
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namespace blink {
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class WebFrame;
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};
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// Call after a V8 Isolate has been created and entered for the first time.
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void CefV8IsolateCreated();
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// Call before a V8 Isolate is exited and destroyed.
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void CefV8IsolateDestroyed();
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// Call to detach all handles associated with the specified context.
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void CefV8ReleaseContext(v8::Handle<v8::Context> context);
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// Set the stack size for uncaught exceptions.
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void CefV8SetUncaughtExceptionStackSize(int stack_size);
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// Set attributes associated with a WebWorker thread.
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void CefV8SetWorkerAttributes(int worker_id, const GURL& worker_url);
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// Used to detach handles when the associated context is released.
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class CefV8ContextState : public base::RefCounted<CefV8ContextState> {
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public:
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CefV8ContextState() : valid_(true) {}
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virtual ~CefV8ContextState() {}
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bool IsValid() { return valid_; }
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void Detach() {
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DCHECK(valid_);
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valid_ = false;
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track_manager_.DeleteAll();
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}
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void AddTrackObject(CefTrackNode* object) {
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DCHECK(valid_);
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track_manager_.Add(object);
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}
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void DeleteTrackObject(CefTrackNode* object) {
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DCHECK(valid_);
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track_manager_.Delete(object);
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}
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private:
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bool valid_;
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CefTrackManager track_manager_;
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};
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// Use this template in conjuction with RefCountedThreadSafe to ensure that a
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// V8 object is deleted on the correct thread.
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struct CefV8DeleteOnMessageLoopThread {
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template<typename T>
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static void Destruct(const T* x) {
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if (x->task_runner()->RunsTasksOnCurrentThread()) {
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delete x;
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} else {
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if (!x->task_runner()->DeleteSoon(FROM_HERE, x)) {
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#if defined(UNIT_TEST)
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// Only logged under unit testing because leaks at shutdown
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// are acceptable under normal circumstances.
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LOG(ERROR) << "DeleteSoon failed on thread " << thread;
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#endif // UNIT_TEST
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}
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}
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}
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};
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// Base class for V8 Handle types.
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class CefV8HandleBase :
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public base::RefCountedThreadSafe<CefV8HandleBase,
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CefV8DeleteOnMessageLoopThread> {
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public:
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virtual ~CefV8HandleBase();
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// Returns true if there is no underlying context or if the underlying context
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// is valid.
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bool IsValid() const {
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return (!context_state_.get() || context_state_->IsValid());
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}
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bool BelongsToCurrentThread() const;
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v8::Isolate* isolate() const { return isolate_; }
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scoped_refptr<base::SequencedTaskRunner> task_runner() const {
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return task_runner_;
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}
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protected:
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// |context| is the context that owns this handle. If empty the current
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// context will be used.
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CefV8HandleBase(v8::Isolate* isolate,
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v8::Handle<v8::Context> context);
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protected:
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v8::Isolate* isolate_;
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scoped_refptr<base::SequencedTaskRunner> task_runner_;
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scoped_refptr<CefV8ContextState> context_state_;
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};
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// Template for V8 Handle types. This class is used to ensure that V8 objects
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// are only released on the render thread.
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template <typename v8class>
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class CefV8Handle : public CefV8HandleBase {
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public:
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typedef v8::Local<v8class> handleType;
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typedef v8::Persistent<v8class> persistentType;
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CefV8Handle(v8::Isolate* isolate,
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v8::Handle<v8::Context> context,
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handleType v)
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: CefV8HandleBase(isolate, context),
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handle_(isolate, v) {
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}
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virtual ~CefV8Handle() {
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handle_.Reset();
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}
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handleType GetNewV8Handle() {
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DCHECK(IsValid());
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return handleType::New(isolate(), handle_);
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}
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persistentType& GetPersistentV8Handle() {
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return handle_;
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}
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protected:
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persistentType handle_;
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DISALLOW_COPY_AND_ASSIGN(CefV8Handle);
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};
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// Specialization for v8::Value with empty implementation to avoid incorrect
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// usage.
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template <>
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class CefV8Handle<v8::Value> {
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};
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class CefV8ContextImpl : public CefV8Context {
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public:
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CefV8ContextImpl(v8::Isolate* isolate,
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v8::Handle<v8::Context> context);
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virtual ~CefV8ContextImpl();
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virtual CefRefPtr<CefTaskRunner> GetTaskRunner() OVERRIDE;
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virtual bool IsValid() OVERRIDE;
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virtual CefRefPtr<CefBrowser> GetBrowser() OVERRIDE;
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virtual CefRefPtr<CefFrame> GetFrame() OVERRIDE;
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virtual CefRefPtr<CefV8Value> GetGlobal() OVERRIDE;
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virtual bool Enter() OVERRIDE;
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virtual bool Exit() OVERRIDE;
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virtual bool IsSame(CefRefPtr<CefV8Context> that) OVERRIDE;
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virtual bool Eval(const CefString& code,
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CefRefPtr<CefV8Value>& retval,
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CefRefPtr<CefV8Exception>& exception) OVERRIDE;
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v8::Handle<v8::Context> GetV8Context();
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blink::WebFrame* GetWebFrame();
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protected:
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typedef CefV8Handle<v8::Context> Handle;
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scoped_refptr<Handle> handle_;
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#ifndef NDEBUG
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// Used in debug builds to catch missing Exits in destructor.
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int enter_count_;
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#endif
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IMPLEMENT_REFCOUNTING(CefV8ContextImpl);
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DISALLOW_COPY_AND_ASSIGN(CefV8ContextImpl);
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};
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class CefV8ValueImpl : public CefV8Value {
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public:
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explicit CefV8ValueImpl(v8::Isolate* isolate);
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CefV8ValueImpl(v8::Isolate* isolate,
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v8::Handle<v8::Value> value);
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virtual ~CefV8ValueImpl();
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// Used for initializing the CefV8ValueImpl. Should be called a single time
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// after the CefV8ValueImpl is created.
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void InitFromV8Value(v8::Handle<v8::Value> value);
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void InitUndefined();
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void InitNull();
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void InitBool(bool value);
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void InitInt(int32 value);
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void InitUInt(uint32 value);
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void InitDouble(double value);
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void InitDate(const CefTime& value);
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void InitString(CefString& value);
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void InitObject(v8::Handle<v8::Value> value, CefTrackNode* tracker);
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// Creates a new V8 value for the underlying value or returns the existing
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// object handle.
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v8::Handle<v8::Value> GetV8Value(bool should_persist);
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virtual bool IsValid() OVERRIDE;
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virtual bool IsUndefined() OVERRIDE;
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virtual bool IsNull() OVERRIDE;
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virtual bool IsBool() OVERRIDE;
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virtual bool IsInt() OVERRIDE;
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virtual bool IsUInt() OVERRIDE;
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virtual bool IsDouble() OVERRIDE;
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virtual bool IsDate() OVERRIDE;
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virtual bool IsString() OVERRIDE;
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virtual bool IsObject() OVERRIDE;
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virtual bool IsArray() OVERRIDE;
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virtual bool IsFunction() OVERRIDE;
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virtual bool IsSame(CefRefPtr<CefV8Value> value) OVERRIDE;
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virtual bool GetBoolValue() OVERRIDE;
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virtual int32 GetIntValue() OVERRIDE;
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virtual uint32 GetUIntValue() OVERRIDE;
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virtual double GetDoubleValue() OVERRIDE;
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virtual CefTime GetDateValue() OVERRIDE;
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virtual CefString GetStringValue() OVERRIDE;
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virtual bool IsUserCreated() OVERRIDE;
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virtual bool HasException() OVERRIDE;
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virtual CefRefPtr<CefV8Exception> GetException() OVERRIDE;
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virtual bool ClearException() OVERRIDE;
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virtual bool WillRethrowExceptions() OVERRIDE;
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virtual bool SetRethrowExceptions(bool rethrow) OVERRIDE;
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virtual bool HasValue(const CefString& key) OVERRIDE;
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virtual bool HasValue(int index) OVERRIDE;
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virtual bool DeleteValue(const CefString& key) OVERRIDE;
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virtual bool DeleteValue(int index) OVERRIDE;
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virtual CefRefPtr<CefV8Value> GetValue(const CefString& key) OVERRIDE;
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virtual CefRefPtr<CefV8Value> GetValue(int index) OVERRIDE;
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virtual bool SetValue(const CefString& key, CefRefPtr<CefV8Value> value,
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PropertyAttribute attribute) OVERRIDE;
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virtual bool SetValue(int index, CefRefPtr<CefV8Value> value) OVERRIDE;
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virtual bool SetValue(const CefString& key, AccessControl settings,
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PropertyAttribute attribute) OVERRIDE;
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virtual bool GetKeys(std::vector<CefString>& keys) OVERRIDE;
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virtual bool SetUserData(CefRefPtr<CefBase> user_data) OVERRIDE;
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virtual CefRefPtr<CefBase> GetUserData() OVERRIDE;
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virtual int GetExternallyAllocatedMemory() OVERRIDE;
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virtual int AdjustExternallyAllocatedMemory(int change_in_bytes) OVERRIDE;
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virtual int GetArrayLength() OVERRIDE;
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virtual CefString GetFunctionName() OVERRIDE;
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virtual CefRefPtr<CefV8Handler> GetFunctionHandler() OVERRIDE;
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virtual CefRefPtr<CefV8Value> ExecuteFunction(
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CefRefPtr<CefV8Value> object,
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const CefV8ValueList& arguments) OVERRIDE;
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virtual CefRefPtr<CefV8Value> ExecuteFunctionWithContext(
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CefRefPtr<CefV8Context> context,
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CefRefPtr<CefV8Value> object,
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const CefV8ValueList& arguments) OVERRIDE;
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protected:
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// Test for and record any exception.
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bool HasCaught(v8::TryCatch& try_catch);
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class Handle : public CefV8HandleBase {
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public:
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typedef v8::Local<v8::Value> handleType;
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typedef v8::Persistent<v8::Value> persistentType;
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Handle(v8::Isolate* isolate,
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v8::Handle<v8::Context> context,
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handleType v,
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CefTrackNode* tracker);
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virtual ~Handle();
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handleType GetNewV8Handle(bool should_persist);
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persistentType& GetPersistentV8Handle();
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void SetWeakIfNecessary();
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private:
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// Callback for weak persistent reference destruction.
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static void Destructor(const v8::WeakCallbackData<v8::Value, Handle>& data);
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persistentType handle_;
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// For Object and Function types, we need to hold on to a reference to their
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// internal data or function handler objects that are reference counted.
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CefTrackNode* tracker_;
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// True if the handle needs to persist due to it being passed into V8.
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bool should_persist_;
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// True if the handle has been set as weak.
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bool is_set_weak_;
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DISALLOW_COPY_AND_ASSIGN(Handle);
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};
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v8::Isolate* isolate_;
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enum {
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TYPE_INVALID = 0,
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TYPE_UNDEFINED,
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TYPE_NULL,
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TYPE_BOOL,
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TYPE_INT,
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TYPE_UINT,
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TYPE_DOUBLE,
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TYPE_DATE,
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TYPE_STRING,
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TYPE_OBJECT,
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} type_;
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union {
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bool bool_value_;
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int32 int_value_;
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uint32 uint_value_;
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double double_value_;
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cef_time_t date_value_;
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cef_string_t string_value_;
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};
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// Used with Object, Function and Array types.
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scoped_refptr<Handle> handle_;
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CefRefPtr<CefV8Exception> last_exception_;
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bool rethrow_exceptions_;
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IMPLEMENT_REFCOUNTING(CefV8ValueImpl);
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DISALLOW_COPY_AND_ASSIGN(CefV8ValueImpl);
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};
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class CefV8StackTraceImpl : public CefV8StackTrace {
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public:
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CefV8StackTraceImpl(v8::Isolate* isolate,
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v8::Handle<v8::StackTrace> handle);
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virtual ~CefV8StackTraceImpl();
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virtual bool IsValid() OVERRIDE;
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virtual int GetFrameCount() OVERRIDE;
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virtual CefRefPtr<CefV8StackFrame> GetFrame(int index) OVERRIDE;
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protected:
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std::vector<CefRefPtr<CefV8StackFrame> > frames_;
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IMPLEMENT_REFCOUNTING(CefV8StackTraceImpl);
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DISALLOW_COPY_AND_ASSIGN(CefV8StackTraceImpl);
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};
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class CefV8StackFrameImpl : public CefV8StackFrame {
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public:
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CefV8StackFrameImpl(v8::Isolate* isolate,
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v8::Handle<v8::StackFrame> handle);
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virtual ~CefV8StackFrameImpl();
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virtual bool IsValid() OVERRIDE;
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virtual CefString GetScriptName() OVERRIDE;
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virtual CefString GetScriptNameOrSourceURL() OVERRIDE;
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virtual CefString GetFunctionName() OVERRIDE;
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virtual int GetLineNumber() OVERRIDE;
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virtual int GetColumn() OVERRIDE;
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virtual bool IsEval() OVERRIDE;
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virtual bool IsConstructor() OVERRIDE;
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protected:
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CefString script_name_;
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CefString script_name_or_source_url_;
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CefString function_name_;
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int line_number_;
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int column_;
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bool is_eval_;
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bool is_constructor_;
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IMPLEMENT_REFCOUNTING(CefV8StackFrameImpl);
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DISALLOW_COPY_AND_ASSIGN(CefV8StackFrameImpl);
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};
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#endif // CEF_LIBCEF_RENDERER_V8_IMPL_H_
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