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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 #include "base/basictypes.h"
      6 #include "base/bind.h"
      7 #include "base/logging.h"
      8 #include "base/strings/string_number_conversions.h"
      9 #include "mojo/examples/window_manager/window_manager.mojom.h"
     10 #include "mojo/public/cpp/application/application.h"
     11 #include "mojo/services/public/cpp/view_manager/node.h"
     12 #include "mojo/services/public/cpp/view_manager/node_observer.h"
     13 #include "mojo/services/public/cpp/view_manager/view.h"
     14 #include "mojo/services/public/cpp/view_manager/view_manager.h"
     15 #include "mojo/services/public/cpp/view_manager/view_manager_delegate.h"
     16 #include "mojo/services/public/cpp/view_manager/view_observer.h"
     17 #include "mojo/services/public/interfaces/navigation/navigation.mojom.h"
     18 #include "ui/events/event_constants.h"
     19 #include "url/gurl.h"
     20 #include "url/url_util.h"
     21 
     22 using mojo::view_manager::Node;
     23 using mojo::view_manager::NodeObserver;
     24 using mojo::view_manager::View;
     25 using mojo::view_manager::ViewManager;
     26 using mojo::view_manager::ViewManagerDelegate;
     27 using mojo::view_manager::ViewObserver;
     28 
     29 namespace mojo {
     30 namespace examples {
     31 
     32 class EmbeddedApp : public Application,
     33                     public ViewManagerDelegate,
     34                     public ViewObserver,
     35                     public NodeObserver {
     36  public:
     37   EmbeddedApp() : view_manager_(NULL) {
     38     url::AddStandardScheme("mojo");
     39   }
     40   virtual ~EmbeddedApp() {}
     41 
     42   void SetNodeColor(uint32 node_id, SkColor color) {
     43     pending_node_colors_[node_id] = color;
     44     ProcessPendingNodeColor(node_id);
     45   }
     46 
     47  private:
     48   class Navigator : public InterfaceImpl<navigation::Navigator> {
     49    public:
     50     explicit Navigator(EmbeddedApp* app) : app_(app) {}
     51    private:
     52     virtual void Navigate(
     53         uint32 node_id,
     54         navigation::NavigationDetailsPtr navigation_details,
     55         navigation::ResponseDetailsPtr response_details) OVERRIDE {
     56       GURL url(navigation_details->url.To<std::string>());
     57       if (!url.is_valid()) {
     58         LOG(ERROR) << "URL is invalid.";
     59         return;
     60       }
     61       // TODO(aa): Verify new URL is same origin as current origin.
     62       SkColor color = 0x00;
     63       if (!base::HexStringToUInt(url.path().substr(1), &color)) {
     64         LOG(ERROR) << "Invalid URL, path not convertible to integer";
     65         return;
     66       }
     67       app_->SetNodeColor(node_id, color);
     68     }
     69     EmbeddedApp* app_;
     70     DISALLOW_COPY_AND_ASSIGN(Navigator);
     71   };
     72 
     73   // Overridden from Application:
     74   virtual void Initialize() MOJO_OVERRIDE {
     75     ViewManager::Create(this, this);
     76     // TODO(aa): Weird for embeddee to talk to embedder by URL. Seems like
     77     // embedder should be able to specify the SP embeddee receives, then
     78     // communication can be anonymous.
     79     ConnectTo<IWindowManager>("mojo:mojo_window_manager", &window_manager_);
     80     AddService<Navigator>(this);
     81   }
     82 
     83   // Overridden from ViewManagerDelegate:
     84   virtual void OnRootAdded(ViewManager* view_manager, Node* root) OVERRIDE {
     85     View* view = View::Create(view_manager);
     86     view->AddObserver(this);
     87     root->SetActiveView(view);
     88     root->AddObserver(this);
     89 
     90     roots_[root->id()] = root;
     91     ProcessPendingNodeColor(root->id());
     92   }
     93 
     94   // Overridden from ViewObserver:
     95   virtual void OnViewInputEvent(View* view, const EventPtr& event) OVERRIDE {
     96     if (event->action == ui::ET_MOUSE_RELEASED)
     97       window_manager_->CloseWindow(view->node()->id());
     98   }
     99 
    100   // Overridden from NodeObserver:
    101   virtual void OnNodeActiveViewChange(
    102       Node* node,
    103       View* old_view,
    104       View* new_view,
    105       NodeObserver::DispositionChangePhase phase) OVERRIDE {
    106     if (new_view == 0)
    107       views_to_reap_[node] = old_view;
    108   }
    109   virtual void OnNodeDestroy(
    110       Node* node,
    111       NodeObserver::DispositionChangePhase phase) OVERRIDE {
    112     if (phase != NodeObserver::DISPOSITION_CHANGED)
    113       return;
    114     DCHECK(roots_.find(node->id()) != roots_.end());
    115     roots_.erase(node->id());
    116     std::map<Node*, View*>::const_iterator it = views_to_reap_.find(node);
    117     if (it != views_to_reap_.end())
    118       it->second->Destroy();
    119   }
    120 
    121   void ProcessPendingNodeColor(uint32 node_id) {
    122     RootMap::iterator root = roots_.find(node_id);
    123     if (root == roots_.end())
    124       return;
    125 
    126     PendingNodeColors::iterator color = pending_node_colors_.find(node_id);
    127     if (color == pending_node_colors_.end())
    128       return;
    129 
    130     root->second->active_view()->SetColor(color->second);
    131     pending_node_colors_.erase(color);
    132   }
    133 
    134   view_manager::ViewManager* view_manager_;
    135   IWindowManagerPtr window_manager_;
    136   std::map<Node*, View*> views_to_reap_;
    137 
    138   typedef std::map<view_manager::Id, Node*> RootMap;
    139   RootMap roots_;
    140 
    141   // We can receive navigations for nodes we don't have yet.
    142   typedef std::map<uint32, SkColor> PendingNodeColors;
    143   PendingNodeColors pending_node_colors_;
    144 
    145   DISALLOW_COPY_AND_ASSIGN(EmbeddedApp);
    146 };
    147 
    148 }  // namespace examples
    149 
    150 // static
    151 Application* Application::Create() {
    152   return new examples::EmbeddedApp;
    153 }
    154 
    155 }  // namespace mojo
    156