[gtk] tabcontents fade-out for instant.

chrome/browser/renderer_host/render_widget_host_view_gtk.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/render_widget_host_view_gtk.h"
 
 // If this gets included after the gtk headers, then a bunch of compiler
 // errors happen because of a "#define Status int" in Xlib.h, which interacts
 // badly with URLRequestStatus::Status.
 #include "chrome/common/render_messages.h"
@@ skipping 28 matching lines @@
 #include "gfx/gtk_preserve_window.h"
 #include "third_party/WebKit/WebKit/chromium/public/gtk/WebInputEventFactory.h"
 #include "webkit/glue/plugins/webplugin.h"
 #include "webkit/glue/webaccessibility.h"
 #include "webkit/glue/webcursor_gtk_data.h"
 
 #if defined(OS_CHROMEOS)
 #include "views/widget/tooltip_window_gtk.h"
 #endif  // defined(OS_CHROMEOS)
 
-static const int kMaxWindowWidth = 4000;
-static const int kMaxWindowHeight = 4000;
-static const char* kRenderWidgetHostViewKey = "__RENDER_WIDGET_HOST_VIEW__";
+namespace {
+
+const int kMaxWindowWidth = 4000;
+const int kMaxWindowHeight = 4000;
+const char* kRenderWidgetHostViewKey = "__RENDER_WIDGET_HOST_VIEW__";
+
+// The duration of the fade-out animation. See |overlay_animation_|.
+const int kFadeEffectDuration = 300;
 
 #if defined(OS_CHROMEOS)
 // TODO(davemoore) Under Chromeos we are increasing the rate that the trackpad
 // generates events to get better precisions. Eventually we will coordinate the
 // driver and this setting to ensure they match.
-static const float kDefaultScrollPixelsPerTick = 20;
+const float kDefaultScrollPixelsPerTick = 20;
 #else
 // See WebInputEventFactor.cpp for a reason for this being the default
 // scroll size for linux.
-static const float kDefaultScrollPixelsPerTick = 160.0f / 3.0f;
+const float kDefaultScrollPixelsPerTick = 160.0f / 3.0f;
 #endif
 
+}  // namespace
+
 using WebKit::WebInputEventFactory;
 using WebKit::WebMouseWheelEvent;
 
 // This class is a simple convenience wrapper for Gtk functions. It has only
 // static methods.
 class RenderWidgetHostViewGtkWidget {
  public:
   static GtkWidget* CreateNewWidget(RenderWidgetHostViewGtk* host_view) {
     GtkWidget* widget = gtk_preserve_window_new();
     gtk_widget_set_name(widget, "chrome-render-widget-host-view");
@@ skipping 399 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewGtk(widget);
 }
 
 RenderWidgetHostViewGtk::RenderWidgetHostViewGtk(RenderWidgetHost* widget_host)
     : host_(widget_host),
       about_to_validate_and_paint_(false),
       is_hidden_(false),
       is_loading_(false),
       is_showing_context_menu_(false),
-      visually_deemphasized_(false),
+      overlay_color_(0),
+      overlay_animation_(this),
       parent_host_view_(NULL),
       parent_(NULL),
       is_popup_first_mouse_release_(true),
       was_focused_before_grab_(false),
       do_x_grab_(false),
       dragged_at_horizontal_edge_(0),
       dragged_at_vertical_edge_(0) {
   host_->set_view(this);
 }
 
 RenderWidgetHostViewGtk::~RenderWidgetHostViewGtk() {
   view_.Destroy();
 }
 
 void RenderWidgetHostViewGtk::InitAsChild() {
   view_.Own(RenderWidgetHostViewGtkWidget::CreateNewWidget(this));
   // |im_context_| must be created after creating |view_| widget.
   im_context_.reset(new GtkIMContextWrapper(this));
   // |key_bindings_handler_| must be created after creating |view_| widget.
   key_bindings_handler_.reset(new GtkKeyBindingsHandler(view_.get()));
   plugin_container_manager_.set_host_widget(view_.get());
 
 #if defined(OS_CHROMEOS)
   tooltip_window_.reset(new views::TooltipWindowGtk(view_.get()));
 #endif  // defined(OS_CHROMEOS)
 
+  overlay_animation_.SetDuration(kFadeEffectDuration);
+  overlay_animation_.SetSlideDuration(kFadeEffectDuration);
+
   gtk_widget_show(view_.get());
 }
 
 void RenderWidgetHostViewGtk::InitAsPopup(
     RenderWidgetHostView* parent_host_view, const gfx::Rect& pos) {
   DoInitAsPopup(parent_host_view, GTK_WINDOW_POPUP, pos, false);
 }
 
 void RenderWidgetHostViewGtk::InitAsFullscreen(
     RenderWidgetHostView* parent_host_view) {
@@ skipping 310 matching lines @@
   about_to_validate_and_paint_ = false;
 
   gfx::Rect paint_rect = gfx::Rect(0, 0, kMaxWindowWidth, kMaxWindowHeight);
   paint_rect = paint_rect.Intersect(invalid_rect_);
 
   if (backing_store) {
     // Only render the widget if it is attached to a window; there's a short
     // period where this object isn't attached to a window but hasn't been
     // Destroy()ed yet and it receives paint messages...
     if (window) {
-      if (!visually_deemphasized_) {
+      if (SkColorGetA(overlay_color_) == 0) {
         // In the common case, use XCopyArea. We don't draw more than once, so
         // we don't need to double buffer.
         backing_store->XShowRect(gfx::Point(0, 0),
             paint_rect, x11_util::GetX11WindowFromGtkWidget(view_.get()));
       } else {
         // If the grey blend is showing, we make two drawing calls. Use double
         // buffering to prevent flicker. Use CairoShowRect because XShowRect
         // shortcuts GDK's double buffering. We won't be able to draw outside
         // of |damage_rect|, so invalidate the difference between |paint_rect|
         // and |damage_rect|.
         if (paint_rect != damage_rect) {
           GdkRectangle extra_gdk_rect =
               paint_rect.Subtract(damage_rect).ToGdkRectangle();
           gdk_window_invalidate_rect(window, &extra_gdk_rect, false);
         }
 
         GdkRectangle rect = { damage_rect.x(), damage_rect.y(),
                               damage_rect.width(), damage_rect.height() };
         gdk_window_begin_paint_rect(window, &rect);
 
         backing_store->CairoShowRect(damage_rect, GDK_DRAWABLE(window));
 
         cairo_t* cr = gdk_cairo_create(window);
         gdk_cairo_rectangle(cr, &rect);
-        cairo_set_source_rgba(cr, 0, 0, 0, 0.7);
+        SkColor overlay = SkColorSetA(
+            overlay_color_,
+            SkColorGetA(overlay_color_) *
+                overlay_animation_.GetCurrentValue());
+        float r = SkColorGetR(overlay) / 255.;
+        float g = SkColorGetG(overlay) / 255.;
+        float b = SkColorGetB(overlay) / 255.;
+        float a = SkColorGetA(overlay) / 255.;
+        cairo_set_source_rgba(cr, r, g, b, a);
         cairo_fill(cr);
         cairo_destroy(cr);
 
         gdk_window_end_paint(window);
       }
     }
     if (!whiteout_start_time_.is_null()) {
       base::TimeDelta whiteout_duration = base::TimeTicks::Now() -
           whiteout_start_time_;
       UMA_HISTOGRAM_TIMES("MPArch.RWHH_WhiteoutDuration", whiteout_duration);
@@ skipping 147 matching lines @@
 void RenderWidgetHostViewGtk::CreatePluginContainer(
     gfx::PluginWindowHandle id) {
   plugin_container_manager_.CreatePluginContainer(id);
 }
 
 void RenderWidgetHostViewGtk::DestroyPluginContainer(
     gfx::PluginWindowHandle id) {
   plugin_container_manager_.DestroyPluginContainer(id);
 }
 
-void RenderWidgetHostViewGtk::SetVisuallyDeemphasized(bool deemphasized) {
-  if (deemphasized == visually_deemphasized_)
+void RenderWidgetHostViewGtk::SetVisuallyDeemphasized(
+    const SkColor* color, bool animate) {
+  // Do nothing unless |color| has changed, meaning |animate| is only
+  // respected for the first call.
+  if (color && (*color == overlay_color_))
     return;
 
-  visually_deemphasized_ = deemphasized;
-  gtk_widget_queue_draw(view_.get());
+  overlay_color_ = color ? *color : 0;
+
+  if (animate) {
+    overlay_animation_.Reset();
+    overlay_animation_.Show();
+  } else {
+    overlay_animation_.Reset(1.0);
+    gtk_widget_queue_draw(view_.get());
+  }
 }
 
 bool RenderWidgetHostViewGtk::ContainsNativeView(
     gfx::NativeView native_view) const {
   // TODO(port)
   NOTREACHED() <<
     "RenderWidgetHostViewGtk::ContainsNativeView not implemented.";
   return false;
 }
 
@@ skipping 10 matching lines @@
     return;
 
   EditCommands edit_commands;
   if (!event.skip_in_browser &&
       key_bindings_handler_->Match(event, &edit_commands)) {
     host_->ForwardEditCommandsForNextKeyEvent(edit_commands);
   }
   host_->ForwardKeyboardEvent(event);
 }
 
+void RenderWidgetHostViewGtk::AnimationEnded(const Animation* animation) {
+  gtk_widget_queue_draw(view_.get());
+}
+
+void RenderWidgetHostViewGtk::AnimationProgressed(const Animation* animation) {
+  gtk_widget_queue_draw(view_.get());
+}
+
+void RenderWidgetHostViewGtk::AnimationCanceled(const Animation* animation) {
+  gtk_widget_queue_draw(view_.get());
+}
+
 // static
 RenderWidgetHostView*
     RenderWidgetHostView::GetRenderWidgetHostViewFromNativeView(
         gfx::NativeView widget) {
   gpointer user_data = g_object_get_data(G_OBJECT(widget),
                                          kRenderWidgetHostViewKey);
   return reinterpret_cast<RenderWidgetHostView*>(user_data);
 }