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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_H_
#define EXTENSIONS_RENDERER_USER_SCRIPT_SET_H_
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "base/memory/shared_memory.h"
#include "base/observer_list.h"
#include "content/public/renderer/render_process_observer.h"
#include "extensions/common/user_script.h"
class GURL;
namespace blink {
class WebFrame;
}
namespace extensions {
class ExtensionSet;
class ScriptInjection;
// The UserScriptSet is a collection of UserScripts which knows how to update
// itself from SharedMemory and create ScriptInjections for UserScripts to
// inject on a page.
class UserScriptSet {
public:
class Observer {
public:
virtual void OnUserScriptsUpdated(
const std::set<HostID>& changed_hosts,
const std::vector<UserScript*>& scripts) = 0;
};
explicit UserScriptSet(const ExtensionSet* extensions);
~UserScriptSet();
// Adds or removes observers.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Appends the ids of the extensions that have user scripts to |ids|.
void GetActiveExtensionIds(std::set<std::string>* ids) const;
// Append any ScriptInjections that should run on the given |web_frame| and
// |tab_id|, at the given |run_location|, to |injections|.
// |extensions| is passed in to verify the corresponding extension is still
// valid.
void GetInjections(ScopedVector<ScriptInjection>* injections,
blink::WebFrame* web_frame,
int tab_id,
UserScript::RunLocation run_location);
scoped_ptr<ScriptInjection> GetDeclarativeScriptInjection(
int script_id,
blink::WebFrame* web_frame,
int tab_id,
UserScript::RunLocation run_location,
const GURL& document_url);
// Updates scripts given the shared memory region containing user scripts.
// Returns true if the scripts were successfully updated.
bool UpdateUserScripts(base::SharedMemoryHandle shared_memory,
const std::set<HostID>& changed_hosts);
const std::vector<UserScript*>& scripts() const { return scripts_.get(); }
private:
// Returns a new ScriptInjection for the given |script| to execute in the
// |web_frame|, or NULL if the script should not execute.
scoped_ptr<ScriptInjection> GetInjectionForScript(
UserScript* script,
blink::WebFrame* web_frame,
int tab_id,
UserScript::RunLocation run_location,
const GURL& document_url,
bool is_declarative);
// Shared memory containing raw script data.
scoped_ptr<base::SharedMemory> shared_memory_;
// The set of all known extensions. Owned by the Dispatcher.
const ExtensionSet* extensions_;
// The UserScripts this injector manages.
ScopedVector<UserScript> scripts_;
// The associated observers.
ObserverList<Observer> observers_;
DISALLOW_COPY_AND_ASSIGN(UserScriptSet);
};
} // namespace extensions
#endif // EXTENSIONS_RENDERER_USER_SCRIPT_SET_H_
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