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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 "ash/wm/status_area_layout_manager.h"
      6 
      7 #include "ash/shelf/shelf_layout_manager.h"
      8 #include "ash/shelf/shelf_widget.h"
      9 #include "ash/system/status_area_widget.h"
     10 #include "base/auto_reset.h"
     11 #include "ui/aura/window.h"
     12 #include "ui/views/widget/widget.h"
     13 
     14 namespace ash {
     15 namespace internal {
     16 
     17 ////////////////////////////////////////////////////////////////////////////////
     18 // StatusAreaLayoutManager, public:
     19 
     20 StatusAreaLayoutManager::StatusAreaLayoutManager(ShelfWidget* shelf)
     21     : in_layout_(false),
     22       shelf_(shelf) {
     23 }
     24 
     25 StatusAreaLayoutManager::~StatusAreaLayoutManager() {
     26 }
     27 
     28 ////////////////////////////////////////////////////////////////////////////////
     29 // StatusAreaLayoutManager, aura::LayoutManager implementation:
     30 
     31 void StatusAreaLayoutManager::OnWindowResized() {
     32   LayoutStatusArea();
     33 }
     34 
     35 void StatusAreaLayoutManager::OnWindowAddedToLayout(aura::Window* child) {
     36 }
     37 
     38 void StatusAreaLayoutManager::OnWillRemoveWindowFromLayout(
     39     aura::Window* child) {
     40 }
     41 
     42 void StatusAreaLayoutManager::OnWindowRemovedFromLayout(aura::Window* child) {
     43 }
     44 
     45 void StatusAreaLayoutManager::OnChildWindowVisibilityChanged(
     46     aura::Window* child, bool visible) {
     47 }
     48 
     49 void StatusAreaLayoutManager::SetChildBounds(
     50     aura::Window* child,
     51     const gfx::Rect& requested_bounds) {
     52   // Only need to have the shelf do a layout if the child changing is the status
     53   // area and the shelf isn't in the process of doing a layout.
     54   if (child != shelf_->status_area_widget()->GetNativeView() || in_layout_) {
     55     SetChildBoundsDirect(child, requested_bounds);
     56     return;
     57   }
     58 
     59   // If the size matches, no need to do anything. We don't check the location as
     60   // that is managed by the shelf.
     61   if (requested_bounds == child->bounds())
     62     return;
     63 
     64   SetChildBoundsDirect(child, requested_bounds);
     65   LayoutStatusArea();
     66 }
     67 
     68 ////////////////////////////////////////////////////////////////////////////////
     69 // StatusAreaLayoutManager, private:
     70 
     71 void StatusAreaLayoutManager::LayoutStatusArea() {
     72   // Shelf layout manager may be already doing layout.
     73   if (shelf_->shelf_layout_manager()->updating_bounds())
     74     return;
     75 
     76   base::AutoReset<bool> auto_reset_in_layout(&in_layout_, true);
     77   shelf_->shelf_layout_manager()->LayoutShelf();
     78 }
     79 
     80 }  // namespace internal
     81 }  // namespace ash
     82