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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 "ui/ozone/platform/dri/dri_window_manager.h"
      6 
      7 #include "base/logging.h"
      8 #include "ui/ozone/platform/dri/dri_cursor.h"
      9 #include "ui/ozone/platform/dri/dri_window.h"
     10 
     11 namespace ui {
     12 
     13 namespace {
     14 
     15 gfx::PointF GetDefaultCursorLocation(DriWindow* window) {
     16   return gfx::PointF(window->GetBounds().width() / 2,
     17                      window->GetBounds().height() / 2);
     18 }
     19 
     20 }  // namespace
     21 
     22 DriWindowManager::DriWindowManager(HardwareCursorDelegate* cursor_delegate)
     23     : last_allocated_widget_(0), cursor_(new DriCursor(cursor_delegate, this)) {
     24 }
     25 
     26 DriWindowManager::~DriWindowManager() {
     27 }
     28 
     29 gfx::AcceleratedWidget DriWindowManager::NextAcceleratedWidget() {
     30   // We're not using 0 since other code assumes that a 0 AcceleratedWidget is an
     31   // invalid widget.
     32   return ++last_allocated_widget_;
     33 }
     34 
     35 void DriWindowManager::AddWindow(gfx::AcceleratedWidget widget,
     36                                  DriWindow* window) {
     37   std::pair<WidgetToWindowMap::iterator, bool> result = window_map_.insert(
     38       std::pair<gfx::AcceleratedWidget, DriWindow*>(widget, window));
     39   DCHECK(result.second) << "Window for " << widget << " already added.";
     40 
     41   if (cursor_->GetCursorWindow() == gfx::kNullAcceleratedWidget)
     42     ResetCursorLocation();
     43 }
     44 
     45 void DriWindowManager::RemoveWindow(gfx::AcceleratedWidget widget) {
     46   WidgetToWindowMap::iterator it = window_map_.find(widget);
     47   if (it != window_map_.end())
     48     window_map_.erase(it);
     49   else
     50     NOTREACHED() << "Attempting to remove non-existing window " << widget;
     51 
     52   if (cursor_->GetCursorWindow() == widget)
     53     ResetCursorLocation();
     54 }
     55 
     56 DriWindow* DriWindowManager::GetWindow(gfx::AcceleratedWidget widget) {
     57   WidgetToWindowMap::iterator it = window_map_.find(widget);
     58   if (it != window_map_.end())
     59     return it->second;
     60 
     61   NOTREACHED() << "Attempting to get non-existing window " << widget;
     62   return NULL;
     63 }
     64 
     65 void DriWindowManager::ResetCursorLocation() {
     66   gfx::AcceleratedWidget cursor_widget = gfx::kNullAcceleratedWidget;
     67   gfx::PointF location;
     68   if (!window_map_.empty()) {
     69     WidgetToWindowMap::iterator it = window_map_.begin();
     70     cursor_widget = it->first;
     71     location = GetDefaultCursorLocation(it->second);
     72   }
     73 
     74   cursor_->MoveCursorTo(cursor_widget, location);
     75 }
     76 
     77 }  // namespace ui
     78