src/chrome/browser/ui/gtk/panels/panel_stack_window_gtk.cc

   1 // Copyright (c) 2013 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 "chrome/browser/ui/gtk/panels/panel_stack_window_gtk.h"
   6
   7 #include <gdk/gdkkeysyms.h>
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "chrome/browser/ui/panels/panel.h"
  10 #include "chrome/browser/ui/panels/stacked_panel_collection.h"
  11 #include "ui/base/x/active_window_watcher_x.h"
  12
  13 // static
  14 NativePanelStackWindow* NativePanelStackWindow::Create(
  15     NativePanelStackWindowDelegate* delegate) {
  16   return new PanelStackWindowGtk(delegate);
  17 }
  18
  19 PanelStackWindowGtk::PanelStackWindowGtk(
  20    NativePanelStackWindowDelegate* delegate)
  21    : delegate_(delegate),
  22      window_(NULL),
  23      is_minimized_(false),
  24      bounds_updates_started_(false) {
  25   ui::ActiveWindowWatcherX::AddObserver(this);
  26 }
  27
  28 PanelStackWindowGtk::~PanelStackWindowGtk() {
  29   ui::ActiveWindowWatcherX::RemoveObserver(this);
  30 }
  31
  32 void PanelStackWindowGtk::Close() {
  33   if (!window_)
  34     return;
  35   gtk_widget_destroy(GTK_WIDGET(window_));
  36   window_ = NULL;
  37 }
  38
  39 void PanelStackWindowGtk::AddPanel(Panel* panel) {
  40   panels_.push_back(panel);
  41
  42   EnsureWindowCreated();
  43   SetStackWindowBounds();
  44
  45   // The panel being stacked should not appear on the taskbar.
  46   gtk_window_set_skip_taskbar_hint(panel->GetNativeWindow(), true);
  47 }
  48
  49 void PanelStackWindowGtk::RemovePanel(Panel* panel) {
  50   panels_.remove(panel);
  51
  52   SetStackWindowBounds();
  53
  54   // The panel being unstacked should re-appear on the taskbar.
  55   // Note that the underlying gtk window is gone when the panel is being
  56   // closed.
  57   GtkWindow* gtk_window = panel->GetNativeWindow();
  58   if (gtk_window)
  59     gtk_window_set_skip_taskbar_hint(gtk_window, false);
  60 }
  61
  62 void PanelStackWindowGtk::MergeWith(NativePanelStackWindow* another) {
  63   PanelStackWindowGtk* another_stack =
  64       static_cast<PanelStackWindowGtk*>(another);
  65   for (Panels::const_iterator iter = another_stack->panels_.begin();
  66        iter != another_stack->panels_.end(); ++iter) {
  67     Panel* panel = *iter;
  68     panels_.push_back(panel);
  69   }
  70   another_stack->panels_.clear();
  71
  72   SetStackWindowBounds();
  73 }
  74
  75 bool PanelStackWindowGtk::IsEmpty() const {
  76   return panels_.empty();
  77 }
  78
  79 bool PanelStackWindowGtk::HasPanel(Panel* panel) const {
  80   return std::find(panels_.begin(), panels_.end(), panel) != panels_.end();
  81 }
  82
  83 void PanelStackWindowGtk::MovePanelsBy(const gfx::Vector2d& delta) {
  84   for (Panels::const_iterator iter = panels_.begin();
  85        iter != panels_.end(); ++iter) {
  86     Panel* panel = *iter;
  87     gfx::Rect bounds = panel->GetBounds();
  88     bounds.Offset(delta);
  89     panel->SetPanelBoundsInstantly(bounds);
  90   }
  91
  92   SetStackWindowBounds();
  93 }
  94
  95 void PanelStackWindowGtk::BeginBatchUpdatePanelBounds(bool animate) {
  96   // Bounds animation is not supported on GTK.
  97   bounds_updates_started_ = true;
  98 }
  99
 100 void PanelStackWindowGtk::AddPanelBoundsForBatchUpdate(
 101     Panel* panel, const gfx::Rect& new_bounds) {
 102   DCHECK(bounds_updates_started_);
 103
 104   // No need to track it if no change is needed.
 105   if (panel->GetBounds() == new_bounds)
 106     return;
 107
 108   // New bounds are stored as the map value.
 109   bounds_updates_[panel] = new_bounds;
 110 }
 111
 112 void PanelStackWindowGtk::EndBatchUpdatePanelBounds() {
 113   DCHECK(bounds_updates_started_);
 114
 115   bounds_updates_started_ = false;
 116
 117   for (BoundsUpdates::const_iterator iter = bounds_updates_.begin();
 118        iter != bounds_updates_.end(); ++iter) {
 119     iter->first->SetPanelBoundsInstantly(iter->second);
 120   }
 121   bounds_updates_.clear();
 122
 123   SetStackWindowBounds();
 124
 125   delegate_->PanelBoundsBatchUpdateCompleted();
 126 }
 127
 128 bool PanelStackWindowGtk::IsAnimatingPanelBounds() const {
 129   return bounds_updates_started_;
 130 }
 131
 132 void PanelStackWindowGtk::Minimize() {
 133   gtk_window_iconify(window_);
 134 }
 135
 136 bool PanelStackWindowGtk::IsMinimized() const {
 137   return is_minimized_;
 138 }
 139
 140 void PanelStackWindowGtk::DrawSystemAttention(bool draw_attention) {
 141   gtk_window_set_urgency_hint(window_, draw_attention);
 142 }
 143
 144 void PanelStackWindowGtk::OnPanelActivated(Panel* panel) {
 145   // If a panel in a stack is activated, make sure all other panels in the stack
 146   // are brought to the top in the z-order.
 147   for (Panels::const_iterator iter = panels_.begin();
 148        iter != panels_.end(); ++iter) {
 149     GtkWindow* gtk_window = (*iter)->GetNativeWindow();
 150     if (gtk_window) {
 151       GdkWindow* gdk_window = gtk_widget_get_window(GTK_WIDGET(gtk_window));
 152       gdk_window_raise(gdk_window);
 153     }
 154   }
 155 }
 156
 157 void PanelStackWindowGtk::ActiveWindowChanged(GdkWindow* active_window) {
 158   // Bail out if icewm is detected. This is because icewm always creates a
 159   // window as active and we do not want to perform the logic here to
 160   // activate a panel window when the background window is being created.
 161   if (ui::GuessWindowManager() == ui::WM_ICE_WM)
 162     return;
 163
 164   if (!window_ || panels_.empty())
 165     return;
 166
 167   // The background stack window is activated when its taskbar icon is clicked.
 168   // When this occurs, we need to activate the most recently active panel.
 169   if (gtk_widget_get_window(GTK_WIDGET(window_)) == active_window) {
 170     Panel* panel_to_focus =
 171         panels_.front()->stack()->most_recently_active_panel();
 172     if (panel_to_focus)
 173       panel_to_focus->Activate();
 174   }
 175 }
 176
 177 gboolean PanelStackWindowGtk::OnWindowDeleteEvent(GtkWidget* widget,
 178                                                   GdkEvent* event) {
 179   DCHECK(!panels_.empty());
 180
 181   // Make a copy since closing a panel could modify the list.
 182   Panels panels_copy = panels_;
 183   for (Panels::const_iterator iter = panels_copy.begin();
 184        iter != panels_copy.end(); ++iter) {
 185     (*iter)->Close();
 186   }
 187
 188   // Return true to prevent the gtk window from being destroyed.  Close will
 189   // destroy it for us.
 190   return TRUE;
 191 }
 192
 193 gboolean PanelStackWindowGtk::OnWindowState(GtkWidget* widget,
 194                                             GdkEventWindowState* event) {
 195   bool is_minimized = event->new_window_state & GDK_WINDOW_STATE_ICONIFIED;
 196   if (is_minimized_ == is_minimized)
 197     return FALSE;
 198   is_minimized_ = is_minimized;
 199
 200   for (Panels::const_iterator iter = panels_.begin();
 201        iter != panels_.end(); ++iter) {
 202     GtkWindow* gtk_window = (*iter)->GetNativeWindow();
 203     if (is_minimized_)
 204       gtk_window_iconify(gtk_window);
 205     else
 206       gtk_window_deiconify(gtk_window);
 207   }
 208
 209   return FALSE;
 210 }
 211
 212 void PanelStackWindowGtk::EnsureWindowCreated() {
 213   if (window_)
 214     return;
 215
 216   DCHECK(!panels_.empty());
 217   Panel* panel = panels_.front();
 218
 219   // Create a small window that stays behinds the panels.
 220   window_ = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
 221   gtk_window_set_decorated(window_, false);
 222   gtk_window_set_resizable(window_, false);
 223   gtk_window_set_focus_on_map(window_, false);
 224   gtk_widget_show(GTK_WIDGET(window_));
 225   gdk_window_move_resize(gtk_widget_get_window(GTK_WIDGET(window_)),
 226       panel->GetBounds().x(), panel->GetBounds().y(), 1, 1);
 227   gdk_window_lower(gtk_widget_get_window(GTK_WIDGET(window_)));
 228
 229   // Connect signal handlers to the window.
 230   g_signal_connect(window_, "delete-event",
 231                    G_CALLBACK(OnWindowDeleteEventThunk), this);
 232   g_signal_connect(window_, "window-state-event",
 233                    G_CALLBACK(OnWindowStateThunk), this);
 234
 235   // Should appear on the taskbar.
 236   gtk_window_set_skip_taskbar_hint(window_, false);
 237
 238   // Set the window icon and title.
 239   string16 title = delegate_->GetTitle();
 240   gtk_window_set_title(window_, UTF16ToUTF8(title).c_str());
 241
 242   gfx::Image app_icon = delegate_->GetIcon();
 243   if (!app_icon.IsEmpty())
 244     gtk_window_set_icon(window_, app_icon.ToGdkPixbuf());
 245 }
 246
 247 void PanelStackWindowGtk::SetStackWindowBounds() {
 248   if (panels_.empty())
 249     return;
 250   Panel* panel = panels_.front();
 251   // Position the small background window a bit away from the left-top corner
 252   // such that it will be completely invisible.
 253   gdk_window_move_resize(gtk_widget_get_window(GTK_WIDGET(window_)),
 254       panel->GetBounds().x() + 5, panel->GetBounds().y() + 5, 1, 1);
 255 }