| // 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 COMPONENTS_GUEST_VIEW_BROWSER_GUEST_VIEW_MANAGER_H_ |
| #define COMPONENTS_GUEST_VIEW_BROWSER_GUEST_VIEW_MANAGER_H_ |
| |
| #include <map> |
| #include <memory> |
| #include <set> |
| #include <vector> |
| |
| #include "base/bind.h" |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "content/public/browser/browser_plugin_guest_manager.h" |
| #include "content/public/browser/web_contents.h" |
| |
| class GURL; |
| |
| namespace base { |
| class DictionaryValue; |
| } |
| |
| namespace content { |
| class BrowserContext; |
| class SiteInstance; |
| } |
| |
| namespace guest_view { |
| |
| class GuestViewBase; |
| class GuestViewManagerDelegate; |
| class GuestViewManagerFactory; |
| |
| class GuestViewManager : public content::BrowserPluginGuestManager, |
| public base::SupportsUserData::Data { |
| public: |
| GuestViewManager(content::BrowserContext* context, |
| std::unique_ptr<GuestViewManagerDelegate> delegate); |
| ~GuestViewManager() override; |
| |
| // Returns the GuestViewManager associated with |context|. If one isn't |
| // available, then it is created and returned. |
| static GuestViewManager* CreateWithDelegate( |
| content::BrowserContext* context, |
| std::unique_ptr<GuestViewManagerDelegate> delegate); |
| |
| // Returns the GuestViewManager associated with |context|. If one isn't |
| // available, then nullptr is returned. |
| static GuestViewManager* FromBrowserContext(content::BrowserContext* context); |
| |
| // Overrides factory for testing. Default (NULL) value indicates regular |
| // (non-test) environment. |
| static void set_factory_for_testing(GuestViewManagerFactory* factory); |
| |
| // Returns the guest WebContents associated with the given |guest_instance_id| |
| // if the provided |embedder_render_process_id| is allowed to access it. |
| // If the embedder is not allowed access, the embedder will be killed, and |
| // this method will return NULL. If no WebContents exists with the given |
| // instance ID, then NULL will also be returned. |
| content::WebContents* GetGuestByInstanceIDSafely( |
| int guest_instance_id, |
| int embedder_render_process_id); |
| |
| // Associates the Browser Plugin with |element_instance_id| to a |
| // guest that has ID of |guest_instance_id| and sets initialization |
| // parameters, |params| for it. |
| virtual void AttachGuest(int embedder_process_id, |
| int element_instance_id, |
| int guest_instance_id, |
| const base::DictionaryValue& attach_params); |
| |
| // Removes the association between |element_instance_id| and a guest instance |
| // ID if one exists. |
| void DetachGuest(GuestViewBase* guest); |
| |
| // Indicates whether the |guest| is owned by an extension or Chrome App. |
| bool IsOwnedByExtension(GuestViewBase* guest); |
| |
| int GetNextInstanceID(); |
| int GetGuestInstanceIDForElementID( |
| int owner_process_id, |
| int element_instance_id); |
| |
| template <typename T> |
| void RegisterGuestViewType() { |
| // If the GuestView type |T| is already registered, then there is nothing |
| // more to do. If an existing entry in the registry was created by this |
| // function for type |T|, then registering again would have no effect, and |
| // if it was registered elsewhere, then we do not want to overwrite it. Note |
| // that it is possible for tests to have special test factory methods |
| // registered here. |
| if (guest_view_registry_.count(T::Type)) |
| return; |
| auto registry_entry = std::make_pair( |
| T::Type, GuestViewData(base::BindRepeating(&T::Create), |
| base::BindRepeating(&T::CleanUp))); |
| guest_view_registry_.insert(registry_entry); |
| } |
| |
| // Registers a callback to be called when the view identified by |
| // |embedder_process_id| and |view_instance_id| is destroyed. |
| // Note that multiple callbacks can be registered for one view. |
| void RegisterViewDestructionCallback(int embedder_process_id, |
| int view_instance_id, |
| base::OnceClosure callback); |
| |
| using WebContentsCreatedCallback = |
| base::OnceCallback<void(content::WebContents*)>; |
| void CreateGuest(const std::string& view_type, |
| content::WebContents* owner_web_contents, |
| const base::DictionaryValue& create_params, |
| WebContentsCreatedCallback callback); |
| |
| content::WebContents* CreateGuestWithWebContentsParams( |
| const std::string& view_type, |
| content::WebContents* owner_web_contents, |
| const content::WebContents::CreateParams& create_params); |
| |
| content::SiteInstance* GetGuestSiteInstance( |
| const GURL& guest_site); |
| |
| // BrowserPluginGuestManager implementation. |
| content::WebContents* GetGuestByInstanceID( |
| int owner_process_id, |
| int element_instance_id) override; |
| bool ForEachGuest(content::WebContents* owner_web_contents, |
| const GuestCallback& callback) override; |
| content::WebContents* GetFullPageGuest( |
| content::WebContents* embedder_web_contents) override; |
| |
| protected: |
| friend class GuestViewBase; |
| friend class GuestViewEvent; |
| friend class GuestViewMessageFilter; |
| |
| class EmbedderRenderProcessHostObserver; |
| |
| // These methods are virtual so that they can be overriden in tests. |
| |
| virtual void AddGuest(int guest_instance_id, |
| content::WebContents* guest_web_contents); |
| virtual void RemoveGuest(int guest_instance_id); |
| |
| // This method is called when the embedder process with ID |
| // |embedder_process_id| has been destroyed. |
| virtual void EmbedderProcessDestroyed(int embedder_process_id); |
| |
| // Called when a GuestView has been created in JavaScript. |
| virtual void ViewCreated(int embedder_process_id, |
| int view_instance_id, |
| const std::string& view_type); |
| |
| // Called when a GuestView has been garbage collected in JavaScript. |
| virtual void ViewGarbageCollected(int embedder_process_id, |
| int view_instance_id); |
| |
| // Calls all destruction callbacks registered for the GuestView identified by |
| // |embedder_process_id| and |view_instance_id|. |
| void CallViewDestructionCallbacks(int embedder_process_id, |
| int view_instance_id); |
| |
| // Calls all destruction callbacks registered for GuestViews in the embedder |
| // with ID |embedder_process_id|. |
| void CallViewDestructionCallbacks(int embedder_process_id); |
| |
| // Creates a guest of the provided |view_type|. |
| GuestViewBase* CreateGuestInternal(content::WebContents* owner_web_contents, |
| const std::string& view_type); |
| |
| // Adds GuestView types to the GuestView registry. |
| void RegisterGuestViewTypes(); |
| |
| // Indicates whether the provided |guest| can be used in the context it has |
| // been created. |
| bool IsGuestAvailableToContext(GuestViewBase* guest); |
| |
| // Dispatches the event with |name| with the provided |args| to the embedder |
| // of the given |guest| with |instance_id| for routing. |
| void DispatchEvent(const std::string& event_name, |
| std::unique_ptr<base::DictionaryValue> args, |
| GuestViewBase* guest, |
| int instance_id); |
| |
| content::WebContents* GetGuestByInstanceID(int guest_instance_id); |
| |
| bool CanEmbedderAccessInstanceIDMaybeKill( |
| int embedder_render_process_id, |
| int guest_instance_id); |
| |
| bool CanEmbedderAccessInstanceID(int embedder_render_process_id, |
| int guest_instance_id); |
| |
| // Returns true if |guest_instance_id| can be used to add a new guest to this |
| // manager. |
| // We disallow adding new guest with instance IDs that were previously removed |
| // from this manager using RemoveGuest. |
| bool CanUseGuestInstanceID(int guest_instance_id); |
| |
| static bool GetFullPageGuestHelper(content::WebContents** result, |
| content::WebContents* guest_web_contents); |
| |
| // Contains guests' WebContents, mapping from their instance ids. |
| using GuestInstanceMap = std::map<int, content::WebContents*>; |
| GuestInstanceMap guest_web_contents_by_instance_id_; |
| |
| struct ElementInstanceKey { |
| int embedder_process_id; |
| int element_instance_id; |
| |
| ElementInstanceKey(); |
| ElementInstanceKey(int embedder_process_id, |
| int element_instance_id); |
| |
| bool operator<(const ElementInstanceKey& other) const; |
| bool operator==(const ElementInstanceKey& other) const; |
| }; |
| |
| using GuestInstanceIDMap = std::map<ElementInstanceKey, int>; |
| GuestInstanceIDMap instance_id_map_; |
| |
| // The reverse map of GuestInstanceIDMap. |
| using GuestInstanceIDReverseMap = std::map<int, ElementInstanceKey>; |
| GuestInstanceIDReverseMap reverse_instance_id_map_; |
| |
| using GuestViewCreateFunction = |
| base::RepeatingCallback<GuestViewBase*(content::WebContents*)>; |
| using GuestViewCleanUpFunction = |
| base::RepeatingCallback<void(content::BrowserContext*, int, int)>; |
| struct GuestViewData { |
| GuestViewData(const GuestViewCreateFunction& create_function, |
| const GuestViewCleanUpFunction& cleanup_function); |
| GuestViewData(const GuestViewData& other); |
| ~GuestViewData(); |
| const GuestViewCreateFunction create_function; |
| const GuestViewCleanUpFunction cleanup_function; |
| }; |
| using GuestViewMethodMap = std::map<std::string, GuestViewData>; |
| GuestViewMethodMap guest_view_registry_; |
| |
| int current_instance_id_; |
| |
| // Any instance ID whose number not greater than this was removed via |
| // RemoveGuest. |
| // This is used so that we don't have store all removed instance IDs in |
| // |removed_instance_ids_|. |
| int last_instance_id_removed_; |
| // The remaining instance IDs that are greater than |
| // |last_instance_id_removed_| are kept here. |
| std::set<int> removed_instance_ids_; |
| |
| content::BrowserContext* const context_; |
| |
| std::unique_ptr<GuestViewManagerDelegate> delegate_; |
| |
| // This tracks which GuestView embedders are currently being observed. |
| std::set<int> embedders_observed_; |
| |
| // |view_destruction_callback_map_| maps from embedder process ID to view ID |
| // to a vector of callback functions to be called when that view is destroyed. |
| using Callbacks = std::vector<base::OnceClosure>; |
| using CallbacksForEachViewID = std::map<int, Callbacks>; |
| using CallbacksForEachEmbedderID = std::map<int, CallbacksForEachViewID>; |
| CallbacksForEachEmbedderID view_destruction_callback_map_; |
| |
| // This is used to ensure that an EmbedderRenderProcessHostObserver will not |
| // call into this GuestViewManager after it has been destroyed. |
| base::WeakPtrFactory<GuestViewManager> weak_ptr_factory_; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(GuestViewManager); |
| }; |
| |
| } // namespace guest_view |
| |
| #endif // COMPONENTS_GUEST_VIEW_BROWSER_GUEST_VIEW_MANAGER_H_ |