src/ash/system/web_notification/ash_popup_alignment_delegate.cc

   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/system/web_notification/ash_popup_alignment_delegate.h"
   6
   7 #include "ash/display/display_controller.h"
   8 #include "ash/shelf/shelf_constants.h"
   9 #include "ash/shelf/shelf_layout_manager.h"
  10 #include "ash/shelf/shelf_types.h"
  11 #include "ash/shelf/shelf_widget.h"
  12 #include "ash/shell.h"
  13 #include "base/i18n/rtl.h"
  14 #include "ui/aura/window.h"
  15 #include "ui/gfx/display.h"
  16 #include "ui/gfx/geometry/rect.h"
  17 #include "ui/gfx/screen.h"
  18 #include "ui/message_center/message_center_style.h"
  19 #include "ui/message_center/views/message_popup_collection.h"
  20
  21 namespace ash {
  22
  23 namespace {
  24
  25 const int kToastMarginX = 3;
  26
  27 // If there should be no margin for the first item, this value needs to be
  28 // substracted to flush the message to the shelf (the width of the border +
  29 // shadow).
  30 const int kNoToastMarginBorderAndShadowOffset = 2;
  31
  32 }
  33
  34 AshPopupAlignmentDelegate::AshPopupAlignmentDelegate()
  35     : display_id_(gfx::Display::kInvalidDisplayID),
  36       screen_(NULL),
  37       root_window_(NULL),
  38       shelf_(NULL),
  39       system_tray_height_(0) {
  40 }
  41
  42 AshPopupAlignmentDelegate::~AshPopupAlignmentDelegate() {
  43   if (screen_)
  44     screen_->RemoveObserver(this);
  45   Shell::GetInstance()->RemoveShellObserver(this);
  46   if (shelf_)
  47     shelf_->RemoveObserver(this);
  48 }
  49
  50 void AshPopupAlignmentDelegate::StartObserving(gfx::Screen* screen,
  51                                                const gfx::Display& display) {
  52   screen_ = screen;
  53   display_id_ = display.id();
  54   work_area_ = display.work_area();
  55   root_window_ = ash::Shell::GetInstance()->display_controller()->
  56       GetRootWindowForDisplayId(display_id_);
  57   UpdateShelf();
  58   screen->AddObserver(this);
  59   Shell::GetInstance()->AddShellObserver(this);
  60   if (system_tray_height_ > 0)
  61     OnAutoHideStateChanged(shelf_->auto_hide_state());
  62 }
  63
  64 void AshPopupAlignmentDelegate::SetSystemTrayHeight(int height) {
  65   system_tray_height_ = height;
  66
  67   // If the shelf is shown during auto-hide state, the distance from the edge
  68   // should be reduced by the height of shelf's shown height.
  69   if (shelf_ && shelf_->visibility_state() == SHELF_AUTO_HIDE &&
  70       shelf_->auto_hide_state() == SHELF_AUTO_HIDE_SHOWN) {
  71     system_tray_height_ -= kShelfSize - ShelfLayoutManager::kAutoHideSize;
  72   }
  73
  74   if (system_tray_height_ > 0)
  75     system_tray_height_ += message_center::kMarginBetweenItems;
  76   else
  77     system_tray_height_ = 0;
  78
  79   if (!shelf_)
  80     return;
  81
  82   DoUpdateIfPossible();
  83 }
  84
  85 int AshPopupAlignmentDelegate::GetToastOriginX(
  86     const gfx::Rect& toast_bounds) const {
  87   // In Ash, RTL UI language mirrors the whole ash layout, so the toast
  88   // widgets should be at the bottom-left instead of bottom right.
  89   if (base::i18n::IsRTL())
  90     return work_area_.x() + kToastMarginX;
  91
  92   if (IsFromLeft())
  93     return work_area_.x() + kToastMarginX;
  94   return work_area_.right() - kToastMarginX - toast_bounds.width();
  95 }
  96
  97 int AshPopupAlignmentDelegate::GetBaseLine() const {
  98   return IsTopDown()
  99       ? work_area_.y() + kNoToastMarginBorderAndShadowOffset +
 100         system_tray_height_
 101       : work_area_.bottom() - kNoToastMarginBorderAndShadowOffset -
 102         system_tray_height_;
 103 }
 104
 105 int AshPopupAlignmentDelegate::GetWorkAreaBottom() const {
 106   return work_area_.bottom() - system_tray_height_;
 107 }
 108
 109 bool AshPopupAlignmentDelegate::IsTopDown() const {
 110   return GetAlignment() == SHELF_ALIGNMENT_TOP;
 111 }
 112
 113 bool AshPopupAlignmentDelegate::IsFromLeft() const {
 114   return GetAlignment() == SHELF_ALIGNMENT_LEFT;
 115 }
 116
 117 void AshPopupAlignmentDelegate::RecomputeAlignment(
 118     const gfx::Display& display) {
 119   // Nothing needs to be done.
 120 }
 121
 122 ShelfAlignment AshPopupAlignmentDelegate::GetAlignment() const {
 123   return shelf_ ? shelf_->GetAlignment() : SHELF_ALIGNMENT_BOTTOM;
 124 }
 125
 126 void AshPopupAlignmentDelegate::UpdateShelf() {
 127   if (shelf_)
 128     return;
 129
 130   shelf_ = ShelfLayoutManager::ForShelf(root_window_);
 131   if (shelf_)
 132     shelf_->AddObserver(this);
 133 }
 134
 135 void AshPopupAlignmentDelegate::OnDisplayWorkAreaInsetsChanged() {
 136   UpdateShelf();
 137
 138   work_area_ = Shell::GetScreen()->GetDisplayNearestWindow(
 139       shelf_->shelf_widget()->GetNativeView()).work_area();
 140 }
 141
 142 void AshPopupAlignmentDelegate::OnAutoHideStateChanged(
 143     ShelfAutoHideState new_state) {
 144   work_area_ = Shell::GetScreen()->GetDisplayNearestWindow(
 145       shelf_->shelf_widget()->GetNativeView()).work_area();
 146   int width = 0;
 147   if ((shelf_->visibility_state() == SHELF_AUTO_HIDE) &&
 148       new_state == SHELF_AUTO_HIDE_SHOWN) {
 149     // Since the work_area is already reduced by kAutoHideSize, the inset width
 150     // should be just the difference.
 151     width = kShelfSize - ShelfLayoutManager::kAutoHideSize;
 152   }
 153   work_area_.Inset(shelf_->SelectValueForShelfAlignment(
 154       gfx::Insets(0, 0, width, 0),
 155       gfx::Insets(0, width, 0, 0),
 156       gfx::Insets(0, 0, 0, width),
 157       gfx::Insets(width, 0, 0, 0)));
 158
 159   DoUpdateIfPossible();
 160 }
 161
 162 void AshPopupAlignmentDelegate::OnDisplayAdded(
 163     const gfx::Display& new_display) {
 164 }
 165
 166 void AshPopupAlignmentDelegate::OnDisplayRemoved(
 167     const gfx::Display& old_display) {
 168 }
 169
 170 void AshPopupAlignmentDelegate::OnDisplayMetricsChanged(
 171     const gfx::Display& display,
 172     uint32_t metrics) {
 173   if (display.id() == display_id_ && shelf_)
 174     OnAutoHideStateChanged(shelf_->auto_hide_state());
 175 }
 176
 177 }  // namespace ash