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// 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_USER_SCRIPT_SET_MANAGER_H_
#define EXTENSIONS_RENDERER_USER_SCRIPT_SET_MANAGER_H_
#include <map>
#include <set>
#include <string>
#include "base/memory/linked_ptr.h"
#include "base/memory/shared_memory.h"
#include "base/observer_list.h"
#include "content/public/renderer/render_process_observer.h"
#include "extensions/common/extension.h"
#include "extensions/common/user_script.h"
#include "extensions/renderer/user_script_set.h"
namespace content {
class RenderFrame;
}
namespace IPC {
class Message;
}
namespace extensions {
class ScriptInjection;
// Manager for separate UserScriptSets, one for each shared memory region.
// Regions are organized as follows:
// static_scripts -- contains all extensions' scripts that are statically
// declared in the extension manifest.
// programmatic_scripts -- one region per host (extension or WebUI) containing
// only programmatically-declared scripts, instantiated
// when an extension first creates a declarative rule
// that would, if triggered, request a script injection.
class UserScriptSetManager : public content::RenderProcessObserver {
public:
// Like a UserScriptSet::Observer, but automatically subscribes to all sets
// associated with the manager.
class Observer {
public:
virtual void OnUserScriptsUpdated(
const std::set<HostID>& changed_hosts,
const std::vector<UserScript*>& scripts) = 0;
};
UserScriptSetManager();
~UserScriptSetManager() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Looks up the script injection associated with |script_id| and
// |extension_id| in the context of the given |web_frame|, |tab_id|,
// and |url|.
scoped_ptr<ScriptInjection> GetInjectionForDeclarativeScript(
int script_id,
content::RenderFrame* render_frame,
int tab_id,
const GURL& url,
const std::string& extension_id);
// Append all injections from |static_scripts| and each of
// |programmatic_scripts_| to |injections|.
void GetAllInjections(ScopedVector<ScriptInjection>* injections,
content::RenderFrame* render_frame,
int tab_id,
UserScript::RunLocation run_location);
// Get active extension IDs from |static_scripts| and each of
// |programmatic_scripts_|.
void GetAllActiveExtensionIds(std::set<std::string>* ids) const;
const UserScriptSet* static_scripts() const { return &static_scripts_; }
private:
// Map for per-extension sets that may be defined programmatically.
typedef std::map<HostID, linked_ptr<UserScriptSet> > UserScriptSetMap;
// content::RenderProcessObserver implementation.
bool OnControlMessageReceived(const IPC::Message& message) override;
UserScriptSet* GetProgrammaticScriptsByHostID(const HostID& host_id);
// Handle the UpdateUserScripts extension message.
void OnUpdateUserScripts(base::SharedMemoryHandle shared_memory,
const HostID& host_id,
const std::set<HostID>& changed_hosts,
bool whitelisted_only);
// Scripts statically defined in extension manifests.
UserScriptSet static_scripts_;
// Scripts programmatically-defined through API calls (initialized and stored
// per-extension).
UserScriptSetMap programmatic_scripts_;
// The associated observers.
base::ObserverList<Observer> observers_;
DISALLOW_COPY_AND_ASSIGN(UserScriptSetManager);
};
} // namespace extensions
#endif // EXTENSIONS_RENDERER_USER_SCRIPT_SET_MANAGER_H_
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