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      1 // Copyright (c) 2012 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 "chrome/browser/extensions/window_controller_list.h"
      6 
      7 #include <algorithm>
      8 
      9 #include "chrome/browser/extensions/extension_function.h"
     10 #include "chrome/browser/extensions/window_controller_list_observer.h"
     11 #include "chrome/browser/sessions/session_id.h"
     12 #include "ui/base/base_window.h"
     13 
     14 namespace extensions {
     15 
     16 ///////////////////////////////////////////////////////////////////////////////
     17 // WindowControllerList
     18 
     19 // static
     20 WindowControllerList* WindowControllerList::GetInstance() {
     21   return Singleton<WindowControllerList>::get();
     22 }
     23 
     24 WindowControllerList::WindowControllerList() {
     25 }
     26 
     27 WindowControllerList::~WindowControllerList() {
     28 }
     29 
     30 void WindowControllerList::AddExtensionWindow(WindowController* window) {
     31   windows_.push_back(window);
     32   FOR_EACH_OBSERVER(WindowControllerListObserver, observers_,
     33                     OnWindowControllerAdded(window));
     34 }
     35 
     36 void WindowControllerList::RemoveExtensionWindow(WindowController* window) {
     37   ControllerList::iterator iter = std::find(
     38       windows_.begin(), windows_.end(), window);
     39   if (iter != windows_.end()) {
     40     windows_.erase(iter);
     41     FOR_EACH_OBSERVER(WindowControllerListObserver, observers_,
     42                       OnWindowControllerRemoved(window));
     43   }
     44 }
     45 
     46 void WindowControllerList::AddObserver(WindowControllerListObserver* observer) {
     47   observers_.AddObserver(observer);
     48 }
     49 
     50 void WindowControllerList::RemoveObserver(
     51     WindowControllerListObserver* observer) {
     52   observers_.RemoveObserver(observer);
     53 }
     54 
     55 WindowController* WindowControllerList::FindWindowById(int id) const {
     56   for (ControllerList::const_iterator iter = windows().begin();
     57        iter != windows().end(); ++iter) {
     58     if ((*iter)->GetWindowId() == id)
     59       return *iter;
     60   }
     61   return NULL;
     62 }
     63 
     64 WindowController* WindowControllerList::FindWindowForFunctionById(
     65     const UIThreadExtensionFunction* function,
     66     int id) const {
     67   WindowController* controller = FindWindowById(id);
     68   if (controller && function->CanOperateOnWindow(controller))
     69     return controller;
     70   return NULL;
     71 }
     72 
     73 WindowController* WindowControllerList::CurrentWindowForFunction(
     74     const UIThreadExtensionFunction* function) const {
     75   WindowController* result = NULL;
     76   // Returns either the focused window (if any), or the last window in the list.
     77   for (ControllerList::const_iterator iter = windows().begin();
     78        iter != windows().end(); ++iter) {
     79     if (function->CanOperateOnWindow(*iter)) {
     80       result = *iter;
     81       if (result->window()->IsActive())
     82         break;  // use focused window
     83     }
     84   }
     85   return result;
     86 }
     87 
     88 }  // namespace extensions
     89