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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 
     16 ////////////////////////////////////////////////////////////////////////////////
     17 // StatusAreaLayoutManager, public:
     18 
     19 StatusAreaLayoutManager::StatusAreaLayoutManager(ShelfWidget* shelf)
     20     : in_layout_(false),
     21       shelf_(shelf) {
     22 }
     23 
     24 StatusAreaLayoutManager::~StatusAreaLayoutManager() {
     25 }
     26 
     27 ////////////////////////////////////////////////////////////////////////////////
     28 // StatusAreaLayoutManager, aura::LayoutManager implementation:
     29 
     30 void StatusAreaLayoutManager::OnWindowResized() {
     31   LayoutStatusArea();
     32 }
     33 
     34 void StatusAreaLayoutManager::OnWindowAddedToLayout(aura::Window* child) {
     35 }
     36 
     37 void StatusAreaLayoutManager::OnWillRemoveWindowFromLayout(
     38     aura::Window* child) {
     39 }
     40 
     41 void StatusAreaLayoutManager::OnWindowRemovedFromLayout(aura::Window* child) {
     42 }
     43 
     44 void StatusAreaLayoutManager::OnChildWindowVisibilityChanged(
     45     aura::Window* child, bool visible) {
     46 }
     47 
     48 void StatusAreaLayoutManager::SetChildBounds(
     49     aura::Window* child,
     50     const gfx::Rect& requested_bounds) {
     51   // Only need to have the shelf do a layout if the child changing is the status
     52   // area and the shelf isn't in the process of doing a layout.
     53   if (child != shelf_->status_area_widget()->GetNativeView() || in_layout_) {
     54     SetChildBoundsDirect(child, requested_bounds);
     55     return;
     56   }
     57 
     58   // If the bounds match, no need to do anything. Check for target bounds to
     59   // ensure any active animation is retargeted.
     60   if (requested_bounds == child->GetTargetBounds())
     61     return;
     62 
     63   SetChildBoundsDirect(child, requested_bounds);
     64   LayoutStatusArea();
     65 }
     66 
     67 ////////////////////////////////////////////////////////////////////////////////
     68 // StatusAreaLayoutManager, private:
     69 
     70 void StatusAreaLayoutManager::LayoutStatusArea() {
     71   // Shelf layout manager may be already doing layout.
     72   if (shelf_->shelf_layout_manager()->updating_bounds())
     73     return;
     74 
     75   base::AutoReset<bool> auto_reset_in_layout(&in_layout_, true);
     76   shelf_->shelf_layout_manager()->LayoutShelf();
     77 }
     78 
     79 }  // namespace ash
     80