Zoom Extension API (chrome)

chrome/browser/ui/views/location_bar/zoom_bubble_view.cc

 // Copyright (c) 2012 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/ui/views/location_bar/zoom_bubble_view.h"
 
 #include "base/i18n/rtl.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chrome_page_zoom.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/location_bar/location_bar_view.h"
 #include "chrome/browser/ui/views/location_bar/zoom_view.h"
 #include "chrome/browser/ui/zoom/zoom_controller.h"
+#include "chrome/common/extensions/api/extension_action/action_info.h"
 #include "content/public/browser/notification_source.h"
+#include "extensions/common/manifest_handlers/icons_handler.h"
 #include "grit/generated_resources.h"
+#include "grit/theme_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/separator.h"
-#include "ui/views/layout/box_layout.h"
+#include "ui/views/layout/grid_layout.h"
 #include "ui/views/layout/layout_constants.h"
 #include "ui/views/widget/widget.h"
 
 namespace {
 
 // The number of milliseconds the bubble should stay on the screen if it will
 // close automatically.
 const int kBubbleCloseDelay = 1500;
 
 // The bubble's padding from the screen edge, used in fullscreen.
@@ skipping 10 matching lines @@
   Browser* browser = chrome::FindBrowserWithWebContents(web_contents);
   DCHECK(browser && browser->window() && browser->fullscreen_controller());
 
   BrowserView* browser_view = BrowserView::GetBrowserViewForBrowser(browser);
   bool is_fullscreen = browser_view->IsFullscreen();
   bool anchor_to_view = !is_fullscreen ||
       browser_view->immersive_mode_controller()->IsRevealed();
   views::View* anchor_view = anchor_to_view ?
       browser_view->GetLocationBarView()->zoom_view() : NULL;
 
-  // If the bubble is already showing in this window and its |auto_close_| value
-  // is equal to |auto_close|, the bubble can be reused and only the label text
-  // needs to be updated.
+  // Find the extension that initiated the zoom change, if any.
+  ZoomController* zoom_controller =
+      ZoomController::FromWebContents(web_contents);
+  const extensions::Extension* extension = zoom_controller->last_extension();
+
+  // If the bubble is already showing in this window, its |auto_close_| value
+  // is equal to |auto_close|, and the zoom change was not initiated by an
+  // extension, then the bubble can be reused and only the label text needs to
+  // be updated.
   if (zoom_bubble_ &&
       zoom_bubble_->GetAnchorView() == anchor_view &&
-      zoom_bubble_->auto_close_ == auto_close) {
-    zoom_bubble_->Refresh();
+      zoom_bubble_->auto_close_ == auto_close &&
+      !extension) {
+      zoom_bubble_->Refresh();
   } else {
     // If the bubble is already showing but its |auto_close_| value is not equal
     // to |auto_close|, the bubble's focus properties must change, so the
     // current bubble must be closed and a new one created.
     CloseBubble();
 
     zoom_bubble_ = new ZoomBubbleView(anchor_view,
                                       web_contents,
                                       auto_close,
                                       browser_view->immersive_mode_controller(),
                                       browser->fullscreen_controller());
 
+    // If the zoom change was initiated by an extension, capture the relevent
+    // information from it.
+    if (extension) {

[Devlin, 2014/06/16 19:04:49]

nit: No brackets.

[wjmaclean, 2014/06/18 19:03:54]

Done.

+      zoom_bubble_->SetExtensionInfo(extension);
+    }
+
     // If we do not have an anchor view, parent the bubble to the content area.
     if (!anchor_to_view) {
       zoom_bubble_->set_parent_window(web_contents->GetTopLevelNativeWindow());
     }
 
     views::BubbleDelegateView::CreateBubble(zoom_bubble_);
 
     // Adjust for fullscreen after creation as it relies on the content size.
     if (is_fullscreen)
       zoom_bubble_->AdjustForFullscreen(browser_view->GetBoundsInScreen());
@@ skipping 23 matching lines @@
 }
 
 ZoomBubbleView::ZoomBubbleView(
     views::View* anchor_view,
     content::WebContents* web_contents,
     bool auto_close,
     ImmersiveModeController* immersive_mode_controller,
     FullscreenController* fullscreen_controller)
     : BubbleDelegateView(anchor_view, anchor_view ?
           views::BubbleBorder::TOP_RIGHT : views::BubbleBorder::NONE),
+      image_button_(NULL),
       label_(NULL),
       web_contents_(web_contents),
       auto_close_(auto_close),
       immersive_mode_controller_(immersive_mode_controller) {
   // Compensate for built-in vertical padding in the anchor view's image.
   set_anchor_view_insets(gfx::Insets(5, 0, 5, 0));
   set_use_focusless(auto_close);
   set_notify_enter_exit_on_child(true);
 
   // Add observers to close the bubble if the fullscreen state or immersive
@@ skipping 17 matching lines @@
   const size_t bubble_half_width = width() / 2;
   const int x_pos = base::i18n::IsRTL() ?
       screen_bounds.x() + bubble_half_width + kFullscreenPaddingEnd :
       screen_bounds.right() - bubble_half_width - kFullscreenPaddingEnd;
   SetAnchorRect(gfx::Rect(x_pos, screen_bounds.y(), 0, 0));
 }
 
 void ZoomBubbleView::Refresh() {
   ZoomController* zoom_controller =
       ZoomController::FromWebContents(web_contents_);
-  int zoom_percent = zoom_controller->zoom_percent();
+  int zoom_percent = zoom_controller->GetZoomPercent();
   label_->SetText(
       l10n_util::GetStringFUTF16Int(IDS_TOOLTIP_ZOOM, zoom_percent));
   StartTimerIfNecessary();
 }
 
 void ZoomBubbleView::Close() {
   GetWidget()->Close();
 }
 
+void ZoomBubbleView::SetExtensionInfo(const extensions::Extension* extension) {
+  DCHECK(extension);
+  extension_info_.id = extension->id();
+  extension_info_.name = extension->name();
+
+  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  const gfx::ImageSkia& default_extension_icon_image =
+      *rb.GetImageSkiaNamed(IDR_EXTENSIONS_FAVICON);
+  int default_size = default_extension_icon_image.width();

[Devlin, 2014/06/16 19:04:49]

Is this really the only way to get the default size?

[wjmaclean, 2014/06/18 19:03:54]

Done.

It took some hunting to find gfx::kFaviconSize ! 

+
+  // We give first preference to an icon from the extension's icon set that
+  // matches the size of the default. But not all extensions will declare an
+  // icon set, or may not have an icon of the default size (we don't want the
+  // bubble to display, for example, a very large icon). In that case, if there
+  // is a browser-action icon (size-19) this is an acceptable alternative.
+  const ExtensionIconSet& icons = extensions::IconsInfo::GetIcons(extension);
+  const ExtensionIconSet& action_icon =
+      extensions::ActionInfo::GetBrowserActionInfo(extension)
+          ->default_icon;
+  bool has_default_sized_icon =
+      !icons.Get(default_size, ExtensionIconSet::MATCH_EXACTLY).empty();
+  if (!has_default_sized_icon && !action_icon.empty())
+    default_size = action_icon.map().begin()->first;

[Devlin, 2014/06/16 19:04:49]

doesn't this mean this is no longer the default_size?  (Just thinking it should
be renamed).

[wjmaclean, 2014/06/18 19:03:54]

Done.

+  const ExtensionIconSet& icon_set_to_use =
+      has_default_sized_icon ? icons : action_icon;
+  extension_info_.icon_image.reset(
+      new extensions::IconImage(web_contents_->GetBrowserContext(),
+                                extension,
+                                icon_set_to_use,
+                                default_size,
+                                default_extension_icon_image,
+                                this));
+}
+
 void ZoomBubbleView::StartTimerIfNecessary() {
   if (auto_close_) {
     if (timer_.IsRunning()) {
       timer_.Reset();
     } else {
       timer_.Start(
           FROM_HERE,
           base::TimeDelta::FromMilliseconds(kBubbleCloseDelay),
           this,
           &ZoomBubbleView::Close);
     }
   }
 }
 
 void ZoomBubbleView::StopTimer() {
   timer_.Stop();
 }
 
+void ZoomBubbleView::OnExtensionIconImageChanged(extensions::IconImage* image) {
+  DCHECK_EQ(image, extension_info_.icon_image.get()) <<
+      "Unknown ImageIcon update.";
+  image_button_->SetImage(views::Button::STATE_NORMAL,
+                          &extension_info_.icon_image->image_skia());
+  image_button_->SchedulePaint();
+}
+
 void ZoomBubbleView::OnMouseEntered(const ui::MouseEvent& event) {
   set_use_focusless(false);
   StopTimer();
 }
 
 void ZoomBubbleView::OnMouseExited(const ui::MouseEvent& event) {
   set_use_focusless(auto_close_);
   StartTimerIfNecessary();
 }
 
 void ZoomBubbleView::OnGestureEvent(ui::GestureEvent* event) {
   if (!zoom_bubble_ || !zoom_bubble_->auto_close_ ||
       event->type() != ui::ET_GESTURE_TAP) {
     return;
   }
 
   // If an auto-closing bubble was tapped, show a non-auto-closing bubble in
   // its place.
   ShowBubble(zoom_bubble_->web_contents_, false);
   event->SetHandled();
 }
 
 void ZoomBubbleView::ButtonPressed(views::Button* sender,
                                    const ui::Event& event) {
-  chrome_page_zoom::Zoom(web_contents_, content::PAGE_ZOOM_RESET);
+  if (sender == image_button_) {
+    DCHECK(extension_info_.icon_image.get()) << "Invalid button press.";
+    Browser* browser = chrome::FindBrowserWithWebContents(web_contents_);
+    std::string url("chrome://extensions?id=");
+    url += extension_info_.id;
+    chrome::AddSelectedTabWithURL(browser,
+                                  GURL(url),
+                                  content::PAGE_TRANSITION_FROM_API);
+  } else {
+    chrome_page_zoom::Zoom(web_contents_, content::PAGE_ZOOM_RESET);
+  }
 }
 
 void ZoomBubbleView::Init() {
-  SetLayoutManager(new views::BoxLayout(views::BoxLayout::kVertical,
-      0, 0, views::kRelatedControlVerticalSpacing));
+  // Set up the layout of the zoom bubble. A grid layout is used because
+  // sometimes an extension icon is shown next to the zoom label.
+  views::GridLayout* grid_layout = new views::GridLayout(this);
+  SetLayoutManager(grid_layout);
+  views::ColumnSet* columns = grid_layout->AddColumnSet(0);
+  // First row.
+  if (extension_info_.icon_image.get()) {
+    columns->AddColumn(views::GridLayout::CENTER,views::GridLayout::CENTER, 2,
+                       views::GridLayout::USE_PREF, 0, 0);
+  }
+  columns->AddColumn(views::GridLayout::FILL, views::GridLayout::FILL, 1,
+                     views::GridLayout::USE_PREF, 0, 0);
+  grid_layout->StartRow(0, 0);
 
+  // If this zoom change was initiated by an extension, that extension will be
+  // attributed by showing its icon in the zoom bubble.
+  if (extension_info_.icon_image.get()) {
+    image_button_ = new views::ImageButton(this);
+    image_button_->SetTooltipText(l10n_util::GetStringFUTF16(
+        IDS_TOOLTIP_ZOOM_EXTENSION_ICON,
+        base::UTF8ToUTF16(extension_info_.name)));
+    image_button_->SetImage(views::Button::STATE_NORMAL,
+                            &extension_info_.icon_image->image_skia());
+    grid_layout->AddView(image_button_);
+  }
+
+  // Add zoom label with the new zoom percent.
   ZoomController* zoom_controller =
       ZoomController::FromWebContents(web_contents_);
-  int zoom_percent = zoom_controller->zoom_percent();
+  int zoom_percent = zoom_controller->GetZoomPercent();
   label_ = new views::Label(
       l10n_util::GetStringFUTF16Int(IDS_TOOLTIP_ZOOM, zoom_percent));
   label_->SetFontList(
       ui::ResourceBundle::GetSharedInstance().GetFontList(
           ui::ResourceBundle::MediumFont));
-  AddChildView(label_);
+  grid_layout->AddView(label_);
 
+  // Second row.
+  grid_layout->AddPaddingRow(0, 8);
+  columns = grid_layout->AddColumnSet(1);
+  columns->AddColumn(views::GridLayout::FILL, views::GridLayout::FILL, 1,
+                     views::GridLayout::USE_PREF, 0, 0);
+  grid_layout->StartRow(0, 1);
+
+  // Add "Reset to Default" button.
   views::LabelButton* set_default_button = new views::LabelButton(
       this, l10n_util::GetStringUTF16(IDS_ZOOM_SET_DEFAULT));
   set_default_button->SetStyle(views::Button::STYLE_BUTTON);
   set_default_button->SetHorizontalAlignment(gfx::ALIGN_CENTER);
-  AddChildView(set_default_button);
+  grid_layout->AddView(set_default_button);
 
   StartTimerIfNecessary();
 }
 
 void ZoomBubbleView::Observe(int type,
                              const content::NotificationSource& source,
                              const content::NotificationDetails& details) {
   DCHECK_EQ(type, chrome::NOTIFICATION_FULLSCREEN_CHANGED);
   CloseBubble();
 }
 
 void ZoomBubbleView::OnImmersiveRevealStarted() {
   CloseBubble();
 }
 
 void ZoomBubbleView::OnImmersiveModeControllerDestroyed() {
   immersive_mode_controller_ = NULL;
 }
 
 void ZoomBubbleView::WindowClosing() {
   // |zoom_bubble_| can be a new bubble by this point (as Close(); doesn't
   // call this right away). Only set to NULL when it's this bubble.
   if (zoom_bubble_ == this)
     zoom_bubble_ = NULL;
 }
+
+ZoomBubbleView::ExtensionInfo::ExtensionInfo() {}
+
+ZoomBubbleView::ExtensionInfo::~ExtensionInfo() {}