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// Copyright 2014 The Chromium Authors
// 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 <vector>
#include "base/memory/read_only_shared_memory_region.h"
#include "base/observer_list.h"
#include "content/public/renderer/render_thread_observer.h"
#include "extensions/common/extension.h"
#include "extensions/common/mojom/host_id.mojom-forward.h"
#include "extensions/common/mojom/run_location.mojom-shared.h"
#include "extensions/common/user_script.h"
#include "extensions/renderer/user_script_set.h"
namespace content {
class RenderFrame;
}
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:
// Like a UserScriptSet::Observer, but automatically subscribes to all sets
// associated with the manager.
class Observer {
public:
virtual void OnUserScriptsUpdated(const mojom::HostID& changed_host) = 0;
};
UserScriptSetManager();
UserScriptSetManager(const UserScriptSetManager&) = delete;
UserScriptSetManager& operator=(const UserScriptSetManager&) = delete;
~UserScriptSetManager();
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|.
std::unique_ptr<ScriptInjection> GetInjectionForDeclarativeScript(
const std::string& 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(
std::vector<std::unique_ptr<ScriptInjection>>* injections,
content::RenderFrame* render_frame,
int tab_id,
mojom::RunLocation run_location);
// Get active extension IDs from `static_scripts_`.
void GetAllActiveExtensionIds(std::set<std::string>* ids) const;
// Handle the UpdateUserScripts extension message.
void OnUpdateUserScripts(base::ReadOnlySharedMemoryRegion shared_memory,
const mojom::HostID& host_id);
// Invalidates script injections for the UserScriptSet in `scripts_`
// corresponding to `extension_id` and deletes the script set.
void OnExtensionUnloaded(const std::string& extension_id);
void set_activity_logging_enabled(bool enabled) {
activity_logging_enabled_ = enabled;
}
private:
// Map for per-host script sets.
using UserScriptSetMap =
std::map<mojom::HostID, std::unique_ptr<UserScriptSet>>;
UserScriptSet* GetScriptsByHostID(const mojom::HostID& host_id);
// Stores all scripts, defined in extension manifests and programmatically
// from extension APIs and webview tags. Each UserScriptSet is keyed by a
// HostID.
UserScriptSetMap scripts_;
// Whether or not dom activity should be logged for injected scripts.
bool activity_logging_enabled_;
// The associated observers.
base::ObserverList<Observer>::Unchecked observers_;
};
} // namespace extensions
#endif // EXTENSIONS_RENDERER_USER_SCRIPT_SET_MANAGER_H_
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