| // Copyright 2014 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 EXTENSIONS_RENDERER_SCRIPT_CONTEXT_SET_H_ |
| #define EXTENSIONS_RENDERER_SCRIPT_CONTEXT_SET_H_ |
| |
| #include <set> |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/bind.h" |
| #include "v8/include/v8.h" |
| |
| class GURL; |
| |
| namespace base { |
| class ListValue; |
| } |
| |
| namespace content { |
| class RenderView; |
| } |
| |
| namespace v8 { |
| class Context; |
| } |
| |
| namespace extensions { |
| class ScriptContext; |
| |
| // A container of ExtensionBindingsContext. Since calling JavaScript within a |
| // context can cause any number of contexts to be created or destroyed, this |
| // has additional smarts to help with the set changing underneath callers. |
| class ScriptContextSet { |
| public: |
| ScriptContextSet(); |
| ~ScriptContextSet(); |
| |
| int size() const; |
| |
| // Takes ownership of |context|. |
| void Add(ScriptContext* context); |
| |
| // If the specified context is contained in this set, remove it, then delete |
| // it asynchronously. After this call returns the context object will still |
| // be valid, but its frame() pointer will be cleared. |
| void Remove(ScriptContext* context); |
| |
| // Returns a copy to protect against changes. |
| typedef std::set<ScriptContext*> ContextSet; |
| ContextSet GetAll() const; |
| |
| // Gets the ScriptContext corresponding to v8::Context::GetCurrent(), or |
| // NULL if no such context exists. |
| ScriptContext* GetCurrent() const; |
| |
| // Gets the ScriptContext corresponding to v8::Context::GetCalling(), or |
| // NULL if no such context exists. |
| ScriptContext* GetCalling() const; |
| |
| // Gets the ScriptContext corresponding to the specified |
| // v8::Context or NULL if no such context exists. |
| ScriptContext* GetByV8Context(v8::Handle<v8::Context> context) const; |
| |
| // Synchronously runs |callback| with each ScriptContext that belongs to |
| // |extension_id| in |render_view|. |
| // |
| // An empty |extension_id| will match all extensions, and a NULL |render_view| |
| // will match all render views, but try to use the inline variants of these |
| // methods instead. |
| void ForEach(const std::string& extension_id, |
| content::RenderView* render_view, |
| const base::Callback<void(ScriptContext*)>& callback) const; |
| // ForEach which matches all extensions. |
| void ForEach(content::RenderView* render_view, |
| const base::Callback<void(ScriptContext*)>& callback) const { |
| ForEach("", render_view, callback); |
| } |
| // ForEach which matches all render views. |
| void ForEach(const std::string& extension_id, |
| const base::Callback<void(ScriptContext*)>& callback) const { |
| ForEach(extension_id, NULL, callback); |
| } |
| |
| // Cleans up contexts belonging to an unloaded extension. |
| // |
| // Returns the set of ScriptContexts that were removed as a result. These |
| // are safe to interact with until the end of the current event loop, since |
| // they're deleted asynchronously. |
| ContextSet OnExtensionUnloaded(const std::string& extension_id); |
| |
| private: |
| ContextSet contexts_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScriptContextSet); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // EXTENSIONS_RENDERER_SCRIPT_CONTEXT_SET_H_ |