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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 "ash/wm/lock_layout_manager.h"
      6 
      7 #include "ash/shell.h"
      8 #include "ash/shell_delegate.h"
      9 #include "ash/wm/lock_window_state.h"
     10 #include "ash/wm/window_state.h"
     11 #include "ash/wm/wm_event.h"
     12 #include "ui/aura/window.h"
     13 #include "ui/aura/window_observer.h"
     14 #include "ui/events/event.h"
     15 #include "ui/keyboard/keyboard_controller.h"
     16 #include "ui/keyboard/keyboard_util.h"
     17 
     18 namespace ash {
     19 
     20 LockLayoutManager::LockLayoutManager(aura::Window* window)
     21     : SnapToPixelLayoutManager(window),
     22       window_(window),
     23       root_window_(window->GetRootWindow()),
     24       is_observing_keyboard_(false) {
     25   Shell::GetInstance()->delegate()->AddVirtualKeyboardStateObserver(this);
     26   root_window_->AddObserver(this);
     27   if (keyboard::KeyboardController::GetInstance()) {
     28     keyboard::KeyboardController::GetInstance()->AddObserver(this);
     29     is_observing_keyboard_ = true;
     30   }
     31 }
     32 
     33 LockLayoutManager::~LockLayoutManager() {
     34   if (root_window_)
     35     root_window_->RemoveObserver(this);
     36 
     37   for (aura::Window::Windows::const_iterator it = window_->children().begin();
     38        it != window_->children().end(); ++it) {
     39     (*it)->RemoveObserver(this);
     40   }
     41 
     42   Shell::GetInstance()->delegate()->RemoveVirtualKeyboardStateObserver(this);
     43 
     44   if (keyboard::KeyboardController::GetInstance() && is_observing_keyboard_) {
     45     keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
     46     is_observing_keyboard_ = false;
     47   }
     48 }
     49 
     50 void LockLayoutManager::OnWindowResized() {
     51   const wm::WMEvent event(wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
     52   AdjustWindowsForWorkAreaChange(&event);
     53 }
     54 
     55 void LockLayoutManager::OnWindowAddedToLayout(aura::Window* child) {
     56   child->AddObserver(this);
     57 
     58   // LockWindowState replaces default WindowState of a child.
     59   wm::WindowState* window_state = LockWindowState::SetLockWindowState(child);
     60   wm::WMEvent event(wm::WM_EVENT_ADDED_TO_WORKSPACE);
     61   window_state->OnWMEvent(&event);
     62 }
     63 
     64 void LockLayoutManager::OnWillRemoveWindowFromLayout(aura::Window* child) {
     65   child->RemoveObserver(this);
     66 }
     67 
     68 void LockLayoutManager::OnWindowRemovedFromLayout(aura::Window* child) {
     69 }
     70 
     71 void LockLayoutManager::OnChildWindowVisibilityChanged(aura::Window* child,
     72                                                        bool visible) {
     73 }
     74 
     75 void LockLayoutManager::SetChildBounds(aura::Window* child,
     76                                        const gfx::Rect& requested_bounds) {
     77   wm::WindowState* window_state = wm::GetWindowState(child);
     78   wm::SetBoundsEvent event(wm::WM_EVENT_SET_BOUNDS, requested_bounds);
     79   window_state->OnWMEvent(&event);
     80 }
     81 
     82 void LockLayoutManager::OnWindowHierarchyChanged(
     83     const WindowObserver::HierarchyChangeParams& params) {
     84 }
     85 
     86 void LockLayoutManager::OnWindowPropertyChanged(aura::Window* window,
     87                                                 const void* key,
     88                                                 intptr_t old) {
     89 }
     90 
     91 void LockLayoutManager::OnWindowStackingChanged(aura::Window* window) {
     92 }
     93 
     94 void LockLayoutManager::OnWindowDestroying(aura::Window* window) {
     95   window->RemoveObserver(this);
     96   if (root_window_ == window)
     97     root_window_ = NULL;
     98 }
     99 
    100 void LockLayoutManager::OnWindowBoundsChanged(aura::Window* window,
    101                                               const gfx::Rect& old_bounds,
    102                                               const gfx::Rect& new_bounds) {
    103   if (root_window_ == window) {
    104     const wm::WMEvent wm_event(wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED);
    105     AdjustWindowsForWorkAreaChange(&wm_event);
    106   }
    107 }
    108 
    109 void LockLayoutManager::OnVirtualKeyboardStateChanged(bool activated) {
    110   if (keyboard::KeyboardController::GetInstance()) {
    111     if (activated) {
    112       if (!is_observing_keyboard_) {
    113         keyboard::KeyboardController::GetInstance()->AddObserver(this);
    114         is_observing_keyboard_ = true;
    115       }
    116     } else {
    117       keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
    118       is_observing_keyboard_ = false;
    119     }
    120   }
    121 }
    122 
    123 void LockLayoutManager::OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) {
    124   keyboard_bounds_ = new_bounds;
    125   OnWindowResized();
    126 }
    127 
    128 void LockLayoutManager::AdjustWindowsForWorkAreaChange(
    129     const wm::WMEvent* event) {
    130   DCHECK(event->type() == wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED ||
    131          event->type() == wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
    132 
    133   for (aura::Window::Windows::const_iterator it = window_->children().begin();
    134        it != window_->children().end();
    135        ++it) {
    136     wm::GetWindowState(*it)->OnWMEvent(event);
    137   }
    138 }
    139 
    140 }  // namespace ash
    141