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Diffstat (limited to 'mojo/services/view_manager/view_manager_service_impl.h')
| -rw-r--r-- | mojo/services/view_manager/view_manager_service_impl.h | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/mojo/services/view_manager/view_manager_service_impl.h b/mojo/services/view_manager/view_manager_service_impl.h new file mode 100644 index 0000000..bf156c3 --- /dev/null +++ b/mojo/services/view_manager/view_manager_service_impl.h @@ -0,0 +1,260 @@ +// 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 SERVICES_VIEW_MANAGER_VIEW_MANAGER_SERVICE_IMPL_H_ +#define SERVICES_VIEW_MANAGER_VIEW_MANAGER_SERVICE_IMPL_H_ + +#include <set> +#include <string> +#include <vector> + +#include "base/basictypes.h" +#include "base/containers/hash_tables.h" +#include "base/memory/scoped_ptr.h" +#include "mojo/services/view_manager/access_policy_delegate.h" +#include "mojo/services/view_manager/ids.h" +#include "third_party/mojo_services/src/surfaces/public/interfaces/surface_id.mojom.h" +#include "third_party/mojo_services/src/view_manager/public/interfaces/view_manager.mojom.h" + +namespace gfx { +class Rect; +} + +namespace view_manager { + +class AccessPolicy; +class ConnectionManager; +class ServerView; + +// An instance of ViewManagerServiceImpl is created for every ViewManagerService +// request. ViewManagerServiceImpl tracks all the state and views created by a +// client. ViewManagerServiceImpl coordinates with ConnectionManager to update +// the client (and internal state) as necessary. +class ViewManagerServiceImpl : public mojo::ViewManagerService, + public AccessPolicyDelegate { + public: + using ViewIdSet = base::hash_set<mojo::Id>; + + ViewManagerServiceImpl(ConnectionManager* connection_manager, + mojo::ConnectionSpecificId creator_id, + const std::string& creator_url, + const std::string& url, + const ViewId& root_id); + ~ViewManagerServiceImpl() override; + + // |services| and |exposed_services| are the ServiceProviders to pass to the + // client via OnEmbed(). + void Init(mojo::ViewManagerClient* client, + mojo::ViewManagerServicePtr service_ptr, + mojo::InterfaceRequest<mojo::ServiceProvider> services, + mojo::ServiceProviderPtr exposed_services); + + mojo::ConnectionSpecificId id() const { return id_; } + mojo::ConnectionSpecificId creator_id() const { return creator_id_; } + const std::string& url() const { return url_; } + + mojo::ViewManagerClient* client() { return client_; } + + // Returns the View with the specified id. + ServerView* GetView(const ViewId& id) { + return const_cast<ServerView*>( + const_cast<const ViewManagerServiceImpl*>(this)->GetView(id)); + } + const ServerView* GetView(const ViewId& id) const; + + // Returns true if this connection's root is |id|. + bool IsRoot(const ViewId& id) const; + + // Returns the id of the root node. This is null if the root has been + // destroyed but the connection is still valid. + const ViewId* root() const { return root_.get(); } + + // Invoked when a connection is about to be destroyed. + void OnWillDestroyViewManagerServiceImpl(ViewManagerServiceImpl* connection); + + // These functions are synchronous variants of those defined in the mojom. The + // ViewManagerService implementations all call into these. See the mojom for + // details. + mojo::ErrorCode CreateView(const ViewId& view_id); + bool AddView(const ViewId& parent_id, const ViewId& child_id); + std::vector<const ServerView*> GetViewTree(const ViewId& view_id) const; + bool SetViewVisibility(const ViewId& view_id, bool visible); + bool EmbedUrl(const std::string& url, + const ViewId& view_id, + mojo::InterfaceRequest<mojo::ServiceProvider> services, + mojo::ServiceProviderPtr exposed_services); + bool Embed(const ViewId& view_id, mojo::ViewManagerClientPtr client); + + // The following methods are invoked after the corresponding change has been + // processed. They do the appropriate bookkeeping and update the client as + // necessary. + void ProcessViewBoundsChanged(const ServerView* view, + const gfx::Rect& old_bounds, + const gfx::Rect& new_bounds, + bool originated_change); + void ProcessViewportMetricsChanged(const mojo::ViewportMetrics& old_metrics, + const mojo::ViewportMetrics& new_metrics, + bool originated_change); + void ProcessWillChangeViewHierarchy(const ServerView* view, + const ServerView* new_parent, + const ServerView* old_parent, + bool originated_change); + void ProcessViewPropertyChanged(const ServerView* view, + const std::string& name, + const std::vector<uint8_t>* new_data, + bool originated_change); + void ProcessViewHierarchyChanged(const ServerView* view, + const ServerView* new_parent, + const ServerView* old_parent, + bool originated_change); + void ProcessViewReorder(const ServerView* view, + const ServerView* relative_view, + mojo::OrderDirection direction, + bool originated_change); + void ProcessViewDeleted(const ViewId& view, bool originated_change); + void ProcessWillChangeViewVisibility(const ServerView* view, + bool originated_change); + void ProcessViewPropertiesChanged(const ServerView* view, + bool originated_change); + + private: + typedef std::map<mojo::ConnectionSpecificId, ServerView*> ViewMap; + + bool IsViewKnown(const ServerView* view) const; + + // These functions return true if the corresponding mojom function is allowed + // for this connection. + bool CanReorderView(const ServerView* view, + const ServerView* relative_view, + mojo::OrderDirection direction) const; + + // Deletes a view owned by this connection. Returns true on success. |source| + // is the connection that originated the change. + bool DeleteViewImpl(ViewManagerServiceImpl* source, ServerView* view); + + // If |view| is known (in |known_views_|) does nothing. Otherwise adds |view| + // to |views|, marks |view| as known and recurses. + void GetUnknownViewsFrom(const ServerView* view, + std::vector<const ServerView*>* views); + + // Removes |view| and all its descendants from |known_views_|. This does not + // recurse through views that were created by this connection. All views owned + // by this connection are added to |local_views|. + void RemoveFromKnown(const ServerView* view, + std::vector<ServerView*>* local_views); + + // Resets the root of this connection. + void RemoveRoot(); + + void RemoveChildrenAsPartOfEmbed(const ViewId& view_id); + + // Converts View(s) to ViewData(s) for transport. This assumes all the views + // are valid for the client. The parent of views the client is not allowed to + // see are set to NULL (in the returned ViewData(s)). + mojo::Array<mojo::ViewDataPtr> ViewsToViewDatas( + const std::vector<const ServerView*>& views); + mojo::ViewDataPtr ViewToViewData(const ServerView* view); + + // Implementation of GetViewTree(). Adds |view| to |views| and recurses if + // CanDescendIntoViewForViewTree() returns true. + void GetViewTreeImpl(const ServerView* view, + std::vector<const ServerView*>* views) const; + + // Notify the client if the drawn state of any of the roots changes. + // |view| is the view that is changing to the drawn state |new_drawn_value|. + void NotifyDrawnStateChanged(const ServerView* view, bool new_drawn_value); + + // Deletes all Views we own. + void DestroyViews(); + + bool PrepareForEmbed(const ViewId& view_id); + + // ViewManagerService: + void CreateView( + mojo::Id transport_view_id, + const mojo::Callback<void(mojo::ErrorCode)>& callback) override; + void DeleteView(mojo::Id transport_view_id, + const mojo::Callback<void(bool)>& callback) override; + void AddView(mojo::Id parent_id, + mojo::Id child_id, + const mojo::Callback<void(bool)>& callback) override; + void RemoveViewFromParent( + mojo::Id view_id, + const mojo::Callback<void(bool)>& callback) override; + void ReorderView(mojo::Id view_id, + mojo::Id relative_view_id, + mojo::OrderDirection direction, + const mojo::Callback<void(bool)>& callback) override; + void GetViewTree(mojo::Id view_id, + const mojo::Callback<void(mojo::Array<mojo::ViewDataPtr>)>& + callback) override; + void SetViewSurfaceId(mojo::Id view_id, + mojo::SurfaceIdPtr surface_id, + const mojo::Callback<void(bool)>& callback) override; + void SetViewBounds(mojo::Id view_id, + mojo::RectPtr bounds, + const mojo::Callback<void(bool)>& callback) override; + void SetViewVisibility(mojo::Id view_id, + bool visible, + const mojo::Callback<void(bool)>& callback) override; + void SetViewProperty(mojo::Id view_id, + const mojo::String& name, + mojo::Array<uint8_t> value, + const mojo::Callback<void(bool)>& callback) override; + void EmbedUrl(const mojo::String& url, + mojo::Id transport_view_id, + mojo::InterfaceRequest<mojo::ServiceProvider> services, + mojo::ServiceProviderPtr exposed_services, + const mojo::Callback<void(bool)>& callback) override; + void Embed(mojo::Id transport_view_id, + mojo::ViewManagerClientPtr client, + const mojo::Callback<void(bool)>& callback) override; + void PerformAction(mojo::Id transport_view_id, + const mojo::String& action, + const mojo::Callback<void(bool)>& callback) override; + + // AccessPolicyDelegate: + bool IsRootForAccessPolicy(const ViewId& id) const override; + bool IsViewKnownForAccessPolicy(const ServerView* view) const override; + bool IsViewRootOfAnotherConnectionForAccessPolicy( + const ServerView* view) const override; + + ConnectionManager* connection_manager_; + + // Id of this connection as assigned by ConnectionManager. + const mojo::ConnectionSpecificId id_; + + // URL this connection was created for. + const std::string url_; + + // ID of the connection that created us. If 0 it indicates either we were + // created by the root, or the connection that created us has been destroyed. + mojo::ConnectionSpecificId creator_id_; + + // The URL of the app that embedded the app this connection was created for. + // NOTE: this is empty if the connection was created by way of directly + // supplying the ViewManagerClient. + const std::string creator_url_; + + mojo::ViewManagerClient* client_; + + scoped_ptr<AccessPolicy> access_policy_; + + // The views created by this connection. This connection owns these objects. + ViewMap view_map_; + + // The set of views that has been communicated to the client. + ViewIdSet known_views_; + + // The root of this connection. This is a scoped_ptr to reinforce the + // connection may have no root. A connection has no root if either the root + // is destroyed or Embed() is invoked on the root. + scoped_ptr<ViewId> root_; + + DISALLOW_COPY_AND_ASSIGN(ViewManagerServiceImpl); +}; + +} // namespace view_manager + +#endif // SERVICES_VIEW_MANAGER_VIEW_MANAGER_SERVICE_IMPL_H_ |