1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_
6 #define CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_
10 #include "base/basictypes.h"
11 #include "base/compiler_specific.h"
12 #include "chrome/renderer/extensions/module_system.h"
13 #include "chrome/renderer/extensions/pepper_request_proxy.h"
14 #include "chrome/renderer/extensions/request_sender.h"
15 #include "chrome/renderer/extensions/safe_builtins.h"
16 #include "chrome/renderer/extensions/scoped_persistent.h"
17 #include "extensions/common/features/feature.h"
18 #include "v8/include/v8.h"
28 namespace extensions {
31 // Chrome's wrapper for a v8 context.
32 class ChromeV8Context : public RequestSender::Source {
34 ChromeV8Context(v8::Handle<v8::Context> context,
35 blink::WebFrame* frame,
36 const Extension* extension,
37 Feature::Context context_type);
38 virtual ~ChromeV8Context();
40 // Clears the WebFrame for this contexts and invalidates the associated
44 // Returns true if this context is still valid, false if it isn't.
45 // A context becomes invalid via Invalidate().
46 bool is_valid() const {
47 return !v8_context_.IsEmpty();
50 v8::Handle<v8::Context> v8_context() const {
51 return v8_context_.NewHandle(v8::Isolate::GetCurrent());
54 const Extension* extension() const {
55 return extension_.get();
58 blink::WebFrame* web_frame() const {
62 Feature::Context context_type() const {
66 void set_module_system(scoped_ptr<ModuleSystem> module_system) {
67 module_system_ = module_system.Pass();
70 ModuleSystem* module_system() { return module_system_.get(); }
72 SafeBuiltins* safe_builtins() {
73 return &safe_builtins_;
75 const SafeBuiltins* safe_builtins() const {
76 return &safe_builtins_;
79 PepperRequestProxy* pepper_request_proxy() {
80 return &pepper_request_proxy_;
83 // Returns the ID of the extension associated with this context, or empty
84 // string if there is no such extension.
85 std::string GetExtensionID() const;
87 // Returns the RenderView associated with this context. Can return NULL if the
88 // context is in the process of being destroyed.
89 content::RenderView* GetRenderView() const;
91 // Get the URL of this context's web frame.
94 // Runs |function| with appropriate scopes. Doesn't catch exceptions, callers
95 // must do that if they want.
97 // USE THIS METHOD RATHER THAN v8::Function::Call WHEREVER POSSIBLE.
98 v8::Local<v8::Value> CallFunction(v8::Handle<v8::Function> function,
100 v8::Handle<v8::Value> argv[]) const;
102 void DispatchEvent(const char* event_name, v8::Handle<v8::Array> args) const;
104 // Fires the onunload event on the unload_event module.
105 void DispatchOnUnloadEvent();
107 // Returns the availability of the API |api_name|.
108 Feature::Availability GetAvailability(const std::string& api_name);
110 // Returns whether the API |api| or any part of the API could be
111 // available in this context without taking into account the context's
113 bool IsAnyFeatureAvailableToContext(const extensions::Feature& api);
115 // Returns a string description of the type of context this is.
116 std::string GetContextTypeDescription();
118 // RequestSender::Source implementation.
119 virtual ChromeV8Context* GetContext() OVERRIDE;
120 virtual void OnResponseReceived(const std::string& name,
123 const base::ListValue& response,
124 const std::string& error) OVERRIDE;
126 v8::Isolate* isolate() const {
131 // The v8 context the bindings are accessible to.
132 ScopedPersistent<v8::Context> v8_context_;
134 // The WebFrame associated with this context. This can be NULL because this
135 // object can outlive is destroyed asynchronously.
136 blink::WebFrame* web_frame_;
138 // The extension associated with this context, or NULL if there is none. This
139 // might be a hosted app in the case that this context is hosting a web URL.
140 scoped_refptr<const Extension> extension_;
142 // The type of context.
143 Feature::Context context_type_;
145 // Owns and structures the JS that is injected to set up extension bindings.
146 scoped_ptr<ModuleSystem> module_system_;
148 // Contains safe copies of builtin objects like Function.prototype.
149 SafeBuiltins safe_builtins_;
151 // The proxy for this context for making API calls from Pepper via Javascript.
152 PepperRequestProxy pepper_request_proxy_;
154 v8::Isolate* isolate_;
156 DISALLOW_COPY_AND_ASSIGN(ChromeV8Context);
159 } // namespace extensions
161 #endif // CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_