chrome/browser/ui/views/frame/contents_web_view.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 "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/base/theme_provider.h"
  11 #include "ui/compositor/layer_tree_owner.h"
  12 #include "ui/views/background.h"
  13
  14 #if defined(USE_AURA)
  15 #include "ui/aura/window.h"
  16 #include "ui/wm/core/window_util.h"
  17 #endif
  18
  19 ContentsWebView::ContentsWebView(content::BrowserContext* browser_context)
  20     : views::WebView(browser_context),
  21       status_bubble_(nullptr) {
  22 }
  23
  24 ContentsWebView::~ContentsWebView() {
  25 }
  26
  27 void ContentsWebView::SetStatusBubble(StatusBubbleViews* status_bubble) {
  28   status_bubble_ = status_bubble;
  29   DCHECK(!status_bubble_ || status_bubble_->base_view() == this);
  30   if (status_bubble_)
  31     status_bubble_->Reposition();
  32 }
  33
  34 bool ContentsWebView::GetNeedsNotificationWhenVisibleBoundsChange() const {
  35   return true;
  36 }
  37
  38 void ContentsWebView::OnVisibleBoundsChanged() {
  39   if (status_bubble_)
  40     status_bubble_->Reposition();
  41 }
  42
  43 void ContentsWebView::ViewHierarchyChanged(
  44     const ViewHierarchyChangedDetails& details) {
  45   WebView::ViewHierarchyChanged(details);
  46   if (details.is_add)
  47     OnThemeChanged();
  48 }
  49
  50 void ContentsWebView::OnThemeChanged() {
  51   ui::ThemeProvider* const theme = GetThemeProvider();
  52   if (!theme)
  53     return;
  54
  55   // Set the background color to a dark tint of the new tab page's background
  56   // color.  This is the color filled within the WebView's bounds when its child
  57   // view is sized specially for fullscreen tab capture.  See WebView header
  58   // file comments for more details.
  59   const int kBackgroundBrightness = 0x33;  // 20%
  60   const SkColor ntp_background =
  61       theme->GetColor(ThemeProperties::COLOR_NTP_BACKGROUND);
  62   set_background(views::Background::CreateSolidBackground(
  63       SkColorGetR(ntp_background) * kBackgroundBrightness / 0xFF,
  64       SkColorGetG(ntp_background) * kBackgroundBrightness / 0xFF,
  65       SkColorGetB(ntp_background) * kBackgroundBrightness / 0xFF,
  66       SkColorGetA(ntp_background)));
  67 }
  68
  69 void ContentsWebView::OnLayerRecreated(ui::Layer* old_layer,
  70                                        ui::Layer* new_layer) {
  71   if (!cloned_layer_tree_)
  72     return;
  73
  74   // Our layer has been recreated and we have a clone of the WebContents
  75   // layer. Combined this means we're about to be destroyed and an animation is
  76   // in effect. The animation cloned our layer, but it won't create another
  77   // clone of the WebContents layer (|cloned_layer_tree_|). Another clone
  78   // is not created as the clone has no owner (see CloneChildren()). Because we
  79   // want the WebContents layer clone to be animated we move it to the
  80   // old_layer, which is the layer the animation happens on. This animation ends
  81   // up owning the layer (and all its descendants).
  82   old_layer->Add(cloned_layer_tree_->release());
  83   cloned_layer_tree_.reset();
  84 }
  85
  86 void ContentsWebView::CloneWebContentsLayer() {
  87   if (!web_contents())
  88     return;
  89 #if defined(USE_AURA)
  90   // We don't need to clone the layers on non-Aura (Mac), because closing an
  91   // NSWindow does not animate.
  92   cloned_layer_tree_ = wm::RecreateLayers(web_contents()->GetNativeView());
  93 #endif
  94   if (!cloned_layer_tree_ || !cloned_layer_tree_->root()) {
  95     cloned_layer_tree_.reset();
  96     return;
  97   }
  98
  99   SetPaintToLayer(true);
 100   set_layer_owner_delegate(this);
 101
 102   // The cloned layer is in a different coordinate system them our layer (which
 103   // is now the new parent of the cloned layer). Convert coordinates so that the
 104   // cloned layer appears at the right location.
 105   gfx::Point origin;
 106   ui::Layer::ConvertPointToLayer(cloned_layer_tree_->root(), layer(), &origin);
 107   cloned_layer_tree_->root()->SetBounds(
 108       gfx::Rect(origin, cloned_layer_tree_->root()->bounds().size()));
 109   layer()->Add(cloned_layer_tree_->root());
 110 }
 111
 112 void ContentsWebView::DestroyClonedLayer() {
 113   cloned_layer_tree_.reset();
 114   SetPaintToLayer(false);
 115   set_layer_owner_delegate(nullptr);
 116 }