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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef COMPONENTS_MUS_VIEW_TREE_IMPL_H_ | |
| 6 #define COMPONENTS_MUS_VIEW_TREE_IMPL_H_ | |
| 7 | |
| 8 #include <set> | |
| 9 #include <string> | |
| 10 #include <vector> | |
| 11 | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/containers/hash_tables.h" | |
| 14 #include "base/memory/ref_counted.h" | |
| 15 #include "base/memory/scoped_ptr.h" | |
| 16 #include "components/mus/access_policy_delegate.h" | |
| 17 #include "components/mus/ids.h" | |
| 18 #include "components/mus/public/interfaces/surface_id.mojom.h" | |
| 19 #include "components/mus/public/interfaces/view_tree.mojom.h" | |
| 20 | |
| 21 namespace gfx { | |
| 22 class Rect; | |
| 23 } | |
| 24 | |
| 25 namespace mus { | |
| 26 | |
| 27 class AccessPolicy; | |
| 28 class ConnectionManager; | |
| 29 class ServerView; | |
| 30 class ViewTreeHostImpl; | |
| 31 | |
| 32 // An instance of ViewTreeImpl is created for every ViewTree request. | |
| 33 // ViewTreeImpl tracks all the state and views created by a client. ViewTreeImpl | |
| 34 // coordinates with ConnectionManager to update the client (and internal state) | |
| 35 // as necessary. | |
| 36 class ViewTreeImpl : public mojo::ViewTree, public AccessPolicyDelegate { | |
| 37 public: | |
| 38 ViewTreeImpl(ConnectionManager* connection_manager, | |
| 39 ConnectionSpecificId creator_id, | |
| 40 const ViewId& root_id, | |
| 41 uint32_t policy_bitmask); | |
| 42 ~ViewTreeImpl() override; | |
| 43 | |
| 44 // |services| and |exposed_services| are the ServiceProviders to pass to the | |
| 45 // client via OnEmbed(). | |
| 46 void Init(mojo::ViewTreeClient* client, mojo::ViewTreePtr tree); | |
| 47 | |
| 48 ConnectionSpecificId id() const { return id_; } | |
| 49 ConnectionSpecificId creator_id() const { return creator_id_; } | |
| 50 | |
| 51 mojo::ViewTreeClient* client() { return client_; } | |
| 52 | |
| 53 // Returns the View with the specified id. | |
| 54 ServerView* GetView(const ViewId& id) { | |
| 55 return const_cast<ServerView*>( | |
| 56 const_cast<const ViewTreeImpl*>(this)->GetView(id)); | |
| 57 } | |
| 58 const ServerView* GetView(const ViewId& id) const; | |
| 59 | |
| 60 // Returns true if this connection's root is |id|. | |
| 61 bool IsRoot(const ViewId& id) const; | |
| 62 | |
| 63 // Returns the id of the root node. This is null if the root has been | |
| 64 // destroyed but the connection is still valid. | |
| 65 const ViewId* root() const { return root_.get(); } | |
| 66 | |
| 67 bool is_embed_root() const { return is_embed_root_; } | |
| 68 | |
| 69 ViewTreeHostImpl* GetHost(); | |
| 70 | |
| 71 // Invoked when a connection is about to be destroyed. | |
| 72 void OnWillDestroyViewTreeImpl(ViewTreeImpl* connection); | |
| 73 | |
| 74 // These functions are synchronous variants of those defined in the mojom. The | |
| 75 // ViewTree implementations all call into these. See the mojom for details. | |
| 76 mojo::ErrorCode CreateView(const ViewId& view_id); | |
| 77 bool AddView(const ViewId& parent_id, const ViewId& child_id); | |
| 78 std::vector<const ServerView*> GetViewTree(const ViewId& view_id) const; | |
| 79 bool SetViewVisibility(const ViewId& view_id, bool visible); | |
| 80 bool Embed(const ViewId& view_id, | |
| 81 mojo::ViewTreeClientPtr client, | |
| 82 uint32_t policy_bitmask, | |
| 83 ConnectionSpecificId* connection_id); | |
| 84 void Embed(const ViewId& view_id, mojo::URLRequestPtr request); | |
| 85 | |
| 86 // The following methods are invoked after the corresponding change has been | |
| 87 // processed. They do the appropriate bookkeeping and update the client as | |
| 88 // necessary. | |
| 89 void ProcessViewBoundsChanged(const ServerView* view, | |
| 90 const gfx::Rect& old_bounds, | |
| 91 const gfx::Rect& new_bounds, | |
| 92 bool originated_change); | |
| 93 void ProcessViewportMetricsChanged(const mojo::ViewportMetrics& old_metrics, | |
| 94 const mojo::ViewportMetrics& new_metrics, | |
| 95 bool originated_change); | |
| 96 void ProcessWillChangeViewHierarchy(const ServerView* view, | |
| 97 const ServerView* new_parent, | |
| 98 const ServerView* old_parent, | |
| 99 bool originated_change); | |
| 100 void ProcessViewPropertyChanged(const ServerView* view, | |
| 101 const std::string& name, | |
| 102 const std::vector<uint8_t>* new_data, | |
| 103 bool originated_change); | |
| 104 void ProcessViewHierarchyChanged(const ServerView* view, | |
| 105 const ServerView* new_parent, | |
| 106 const ServerView* old_parent, | |
| 107 bool originated_change); | |
| 108 void ProcessViewReorder(const ServerView* view, | |
| 109 const ServerView* relative_view, | |
| 110 mojo::OrderDirection direction, | |
| 111 bool originated_change); | |
| 112 void ProcessViewDeleted(const ViewId& view, bool originated_change); | |
| 113 void ProcessWillChangeViewVisibility(const ServerView* view, | |
| 114 bool originated_change); | |
| 115 void ProcessFocusChanged(const ServerView* old_focused_view, | |
| 116 const ServerView* new_focused_view); | |
| 117 | |
| 118 private: | |
| 119 using ViewIdSet = base::hash_set<Id>; | |
| 120 using ViewMap = std::map<ConnectionSpecificId, ServerView*>; | |
| 121 | |
| 122 bool IsViewKnown(const ServerView* view) const; | |
| 123 | |
| 124 // These functions return true if the corresponding mojom function is allowed | |
| 125 // for this connection. | |
| 126 bool CanReorderView(const ServerView* view, | |
| 127 const ServerView* relative_view, | |
| 128 mojo::OrderDirection direction) const; | |
| 129 | |
| 130 // Deletes a view owned by this connection. Returns true on success. |source| | |
| 131 // is the connection that originated the change. | |
| 132 bool DeleteViewImpl(ViewTreeImpl* source, ServerView* view); | |
| 133 | |
| 134 // If |view| is known (in |known_views_|) does nothing. Otherwise adds |view| | |
| 135 // to |views|, marks |view| as known and recurses. | |
| 136 void GetUnknownViewsFrom(const ServerView* view, | |
| 137 std::vector<const ServerView*>* views); | |
| 138 | |
| 139 // Removes |view| and all its descendants from |known_views_|. This does not | |
| 140 // recurse through views that were created by this connection. All views owned | |
| 141 // by this connection are added to |local_views|. | |
| 142 void RemoveFromKnown(const ServerView* view, | |
| 143 std::vector<ServerView*>* local_views); | |
| 144 | |
| 145 // Resets the root of this connection. | |
| 146 void RemoveRoot(); | |
| 147 | |
| 148 // Converts View(s) to ViewData(s) for transport. This assumes all the views | |
| 149 // are valid for the client. The parent of views the client is not allowed to | |
| 150 // see are set to NULL (in the returned ViewData(s)). | |
| 151 mojo::Array<mojo::ViewDataPtr> ViewsToViewDatas( | |
| 152 const std::vector<const ServerView*>& views); | |
| 153 mojo::ViewDataPtr ViewToViewData(const ServerView* view); | |
| 154 | |
| 155 // Implementation of GetViewTree(). Adds |view| to |views| and recurses if | |
| 156 // CanDescendIntoViewForViewTree() returns true. | |
| 157 void GetViewTreeImpl(const ServerView* view, | |
| 158 std::vector<const ServerView*>* views) const; | |
| 159 | |
| 160 // Notify the client if the drawn state of any of the roots changes. | |
| 161 // |view| is the view that is changing to the drawn state |new_drawn_value|. | |
| 162 void NotifyDrawnStateChanged(const ServerView* view, bool new_drawn_value); | |
| 163 | |
| 164 // Deletes all Views we own. | |
| 165 void DestroyViews(); | |
| 166 | |
| 167 bool CanEmbed(const ViewId& view_id, uint32_t policy_bitmask) const; | |
| 168 void PrepareForEmbed(const ViewId& view_id); | |
| 169 void RemoveChildrenAsPartOfEmbed(const ViewId& view_id); | |
| 170 | |
| 171 // ViewTree: | |
| 172 void CreateView( | |
| 173 Id transport_view_id, | |
| 174 const mojo::Callback<void(mojo::ErrorCode)>& callback) override; | |
| 175 void DeleteView(Id transport_view_id, | |
| 176 const mojo::Callback<void(bool)>& callback) override; | |
| 177 void AddView(Id parent_id, | |
| 178 Id child_id, | |
| 179 const mojo::Callback<void(bool)>& callback) override; | |
| 180 void RemoveViewFromParent( | |
| 181 Id view_id, | |
| 182 const mojo::Callback<void(bool)>& callback) override; | |
| 183 void ReorderView(Id view_id, | |
| 184 Id relative_view_id, | |
| 185 mojo::OrderDirection direction, | |
| 186 const mojo::Callback<void(bool)>& callback) override; | |
| 187 void GetViewTree(Id view_id, | |
| 188 const mojo::Callback<void(mojo::Array<mojo::ViewDataPtr>)>& | |
| 189 callback) override; | |
| 190 void SetViewBounds(Id view_id, | |
| 191 mojo::RectPtr bounds, | |
| 192 const mojo::Callback<void(bool)>& callback) override; | |
| 193 void SetViewVisibility(Id view_id, | |
| 194 bool visible, | |
| 195 const mojo::Callback<void(bool)>& callback) override; | |
| 196 void SetViewProperty(Id view_id, | |
| 197 const mojo::String& name, | |
| 198 mojo::Array<uint8_t> value, | |
| 199 const mojo::Callback<void(bool)>& callback) override; | |
| 200 void RequestSurface(Id view_id, | |
| 201 mojo::InterfaceRequest<mojo::Surface> surface, | |
| 202 mojo::SurfaceClientPtr client) override; | |
| 203 void Embed(Id transport_view_id, | |
| 204 mojo::ViewTreeClientPtr client, | |
| 205 uint32_t policy_bitmask, | |
| 206 const EmbedCallback& callback) override; | |
| 207 void SetFocus(uint32_t view_id) override; | |
| 208 void SetViewTextInputState(uint32_t view_id, | |
| 209 mojo::TextInputStatePtr state) override; | |
| 210 void SetImeVisibility(Id transport_view_id, | |
| 211 bool visible, | |
| 212 mojo::TextInputStatePtr state) override; | |
| 213 | |
| 214 // AccessPolicyDelegate: | |
| 215 bool IsRootForAccessPolicy(const ViewId& id) const override; | |
| 216 bool IsViewKnownForAccessPolicy(const ServerView* view) const override; | |
| 217 bool IsViewRootOfAnotherConnectionForAccessPolicy( | |
| 218 const ServerView* view) const override; | |
| 219 bool IsDescendantOfEmbedRoot(const ServerView* view) override; | |
| 220 | |
| 221 ConnectionManager* connection_manager_; | |
| 222 | |
| 223 // Id of this connection as assigned by ConnectionManager. | |
| 224 const ConnectionSpecificId id_; | |
| 225 | |
| 226 // ID of the connection that created us. If 0 it indicates either we were | |
| 227 // created by the root, or the connection that created us has been destroyed. | |
| 228 ConnectionSpecificId creator_id_; | |
| 229 | |
| 230 mojo::ViewTreeClient* client_; | |
| 231 | |
| 232 scoped_ptr<mus::AccessPolicy> access_policy_; | |
| 233 | |
| 234 // The views created by this connection. This connection owns these objects. | |
| 235 ViewMap view_map_; | |
| 236 | |
| 237 // The set of views that has been communicated to the client. | |
| 238 ViewIdSet known_views_; | |
| 239 | |
| 240 // The root of this connection. This is a scoped_ptr to reinforce the | |
| 241 // connection may have no root. A connection has no root if either the root | |
| 242 // is destroyed or Embed() is invoked on the root. | |
| 243 scoped_ptr<ViewId> root_; | |
| 244 | |
| 245 bool is_embed_root_; | |
| 246 | |
| 247 DISALLOW_COPY_AND_ASSIGN(ViewTreeImpl); | |
| 248 }; | |
| 249 | |
| 250 } // namespace mus | |
| 251 | |
| 252 #endif // COMPONENTS_MUS_VIEW_TREE_IMPL_H_ | |
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Chromium Code Reviews
Issue 1377493002:
mus: move View Manager to components/mus/vm (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master