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   root_window_ = ash::Shell::GetInstance()->display_controller()->
  55       GetRootWindowForDisplayId(display_id_);
  56   UpdateShelf();
  57   screen->AddObserver(this);
  58   Shell::GetInstance()->AddShellObserver(this);
  59   if (system_tray_height_ > 0)
  60     OnAutoHideStateChanged(shelf_->auto_hide_state());
  61 }
  62
  63 void AshPopupAlignmentDelegate::SetSystemTrayHeight(int height) {
  64   system_tray_height_ = height;
  65
  66   // If the shelf is shown during auto-hide state, the distance from the edge
  67   // should be reduced by the height of shelf's shown height.
  68   if (shelf_ && shelf_->visibility_state() == SHELF_AUTO_HIDE &&
  69       shelf_->auto_hide_state() == SHELF_AUTO_HIDE_SHOWN) {
  70     system_tray_height_ -= kShelfSize - ShelfLayoutManager::kAutoHideSize;
  71   }
  72
  73   if (system_tray_height_ > 0)
  74     system_tray_height_ += message_center::kMarginBetweenItems;
  75   else
  76     system_tray_height_ = 0;
  77
  78   if (!shelf_)
  79     return;
  80
  81   DoUpdateIfPossible();
  82 }
  83
  84 int AshPopupAlignmentDelegate::GetToastOriginX(
  85     const gfx::Rect& toast_bounds) const {
  86   // In Ash, RTL UI language mirrors the whole ash layout, so the toast
  87   // widgets should be at the bottom-left instead of bottom right.
  88   if (base::i18n::IsRTL())
  89     return work_area_.x() + kToastMarginX;
  90
  91   if (IsFromLeft())
  92     return work_area_.x() + kToastMarginX;
  93   return work_area_.right() - kToastMarginX - toast_bounds.width();
  94 }
  95
  96 int AshPopupAlignmentDelegate::GetBaseLine() const {
  97   return IsTopDown()
  98       ? work_area_.y() + kNoToastMarginBorderAndShadowOffset +
  99         system_tray_height_
 100       : work_area_.bottom() - kNoToastMarginBorderAndShadowOffset -
 101         system_tray_height_;
 102 }
 103
 104 int AshPopupAlignmentDelegate::GetWorkAreaBottom() const {
 105   return work_area_.bottom() - system_tray_height_;
 106 }
 107
 108 bool AshPopupAlignmentDelegate::IsTopDown() const {
 109   return GetAlignment() == SHELF_ALIGNMENT_TOP;
 110 }
 111
 112 bool AshPopupAlignmentDelegate::IsFromLeft() const {
 113   return GetAlignment() == SHELF_ALIGNMENT_LEFT;
 114 }
 115
 116 void AshPopupAlignmentDelegate::RecomputeAlignment(
 117     const gfx::Display& display) {
 118   // Nothing needs to be done.
 119 }
 120
 121 ShelfAlignment AshPopupAlignmentDelegate::GetAlignment() const {
 122   return shelf_ ? shelf_->GetAlignment() : SHELF_ALIGNMENT_BOTTOM;
 123 }
 124
 125 void AshPopupAlignmentDelegate::UpdateShelf() {
 126   if (shelf_)
 127     return;
 128
 129   shelf_ = ShelfLayoutManager::ForShelf(root_window_);
 130   if (shelf_)
 131     shelf_->AddObserver(this);
 132 }
 133
 134 void AshPopupAlignmentDelegate::OnDisplayWorkAreaInsetsChanged() {
 135   UpdateShelf();
 136
 137   work_area_ = Shell::GetScreen()->GetDisplayNearestWindow(
 138       shelf_->shelf_widget()->GetNativeView()).work_area();
 139 }
 140
 141 void AshPopupAlignmentDelegate::OnAutoHideStateChanged(
 142     ShelfAutoHideState new_state) {
 143   work_area_ = Shell::GetScreen()->GetDisplayNearestWindow(
 144       shelf_->shelf_widget()->GetNativeView()).work_area();
 145   int width = 0;
 146   if ((shelf_->visibility_state() == SHELF_AUTO_HIDE) &&
 147       new_state == SHELF_AUTO_HIDE_SHOWN) {
 148     // Since the work_area is already reduced by kAutoHideSize, the inset width
 149     // should be just the difference.
 150     width = kShelfSize - ShelfLayoutManager::kAutoHideSize;
 151   }
 152   work_area_.Inset(shelf_->SelectValueForShelfAlignment(
 153       gfx::Insets(0, 0, width, 0),
 154       gfx::Insets(0, width, 0, 0),
 155       gfx::Insets(0, 0, 0, width),
 156       gfx::Insets(width, 0, 0, 0)));
 157
 158   DoUpdateIfPossible();
 159 }
 160
 161 void AshPopupAlignmentDelegate::OnDisplayAdded(
 162     const gfx::Display& new_display) {
 163 }
 164
 165 void AshPopupAlignmentDelegate::OnDisplayRemoved(
 166     const gfx::Display& old_display) {
 167 }
 168
 169 void AshPopupAlignmentDelegate::OnDisplayMetricsChanged(
 170     const gfx::Display& display,
 171     uint32_t metrics) {
 172   if (display.id() == display_id_ && shelf_)
 173     OnAutoHideStateChanged(shelf_->auto_hide_state());
 174 }
 175
 176 }  // namespace ash