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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 "chrome/browser/ui/views/frame/contents_web_view.h"
      6 
      7 #include "chrome/browser/themes/theme_properties.h"
      8 #include "chrome/browser/ui/views/status_bubble_views.h"
      9 #include "content/public/browser/web_contents.h"
     10 #include "ui/aura/window.h"
     11 #include "ui/base/theme_provider.h"
     12 #include "ui/compositor/layer_tree_owner.h"
     13 #include "ui/views/background.h"
     14 #include "ui/wm/core/window_util.h"
     15 
     16 ContentsWebView::ContentsWebView(content::BrowserContext* browser_context)
     17     : views::WebView(browser_context),
     18       status_bubble_(NULL) {
     19 }
     20 
     21 ContentsWebView::~ContentsWebView() {
     22 }
     23 
     24 void ContentsWebView::SetStatusBubble(StatusBubbleViews* status_bubble) {
     25   status_bubble_ = status_bubble;
     26   DCHECK(!status_bubble_ || status_bubble_->base_view() == this);
     27   if (status_bubble_)
     28     status_bubble_->Reposition();
     29 }
     30 
     31 bool ContentsWebView::GetNeedsNotificationWhenVisibleBoundsChange() const {
     32   return true;
     33 }
     34 
     35 void ContentsWebView::OnVisibleBoundsChanged() {
     36   if (status_bubble_)
     37     status_bubble_->Reposition();
     38 }
     39 
     40 void ContentsWebView::ViewHierarchyChanged(
     41     const ViewHierarchyChangedDetails& details) {
     42   WebView::ViewHierarchyChanged(details);
     43   if (details.is_add)
     44     OnThemeChanged();
     45 }
     46 
     47 void ContentsWebView::OnThemeChanged() {
     48   ui::ThemeProvider* const theme = GetThemeProvider();
     49   if (!theme)
     50     return;
     51 
     52   // Set the background color to a dark tint of the new tab page's background
     53   // color.  This is the color filled within the WebView's bounds when its child
     54   // view is sized specially for fullscreen tab capture.  See WebView header
     55   // file comments for more details.
     56   const int kBackgroundBrightness = 0x33;  // 20%
     57   const SkColor ntp_background =
     58       theme->GetColor(ThemeProperties::COLOR_NTP_BACKGROUND);
     59   set_background(views::Background::CreateSolidBackground(
     60       SkColorGetR(ntp_background) * kBackgroundBrightness / 0xFF,
     61       SkColorGetG(ntp_background) * kBackgroundBrightness / 0xFF,
     62       SkColorGetB(ntp_background) * kBackgroundBrightness / 0xFF,
     63       SkColorGetA(ntp_background)));
     64 }
     65 
     66 void ContentsWebView::OnLayerRecreated(ui::Layer* old_layer,
     67                                        ui::Layer* new_layer) {
     68   if (!cloned_layer_tree_)
     69     return;
     70 
     71   // Our layer has been recreated and we have a clone of the WebContents
     72   // layer. Combined this means we're about to be destroyed and an animation is
     73   // in effect. The animation cloned our layer, but it won't create another
     74   // clone of the WebContents layer (|cloned_layer_tree_|). Another clone
     75   // is not created as the clone has no owner (see CloneChildren()). Because we
     76   // want the WebContents layer clone to be animated we move it to the
     77   // old_layer, which is the layer the animation happens on. This animation ends
     78   // up owning the layer (and all its descendants).
     79   old_layer->Add(cloned_layer_tree_->release());
     80   cloned_layer_tree_.reset();
     81 }
     82 
     83 void ContentsWebView::CloneWebContentsLayer() {
     84   if (!web_contents())
     85     return;
     86   cloned_layer_tree_ = wm::RecreateLayers(web_contents()->GetNativeView());
     87   if (!cloned_layer_tree_ || !cloned_layer_tree_->root()) {
     88     cloned_layer_tree_.reset();
     89     return;
     90   }
     91 
     92   SetPaintToLayer(true);
     93   set_layer_owner_delegate(this);
     94 
     95   // The cloned layer is in a different coordinate system them our layer (which
     96   // is now the new parent of the cloned layer). Convert coordinates so that the
     97   // cloned layer appears at the right location.
     98   gfx::Point origin;
     99   ui::Layer::ConvertPointToLayer(cloned_layer_tree_->root(), layer(), &origin);
    100   cloned_layer_tree_->root()->SetBounds(
    101       gfx::Rect(origin, cloned_layer_tree_->root()->bounds().size()));
    102   layer()->Add(cloned_layer_tree_->root());
    103 }
    104 
    105 void ContentsWebView::DestroyClonedLayer() {
    106   cloned_layer_tree_.reset();
    107   SetPaintToLayer(false);
    108   set_layer_owner_delegate(NULL);
    109 }
    110