[Mac] Implement the basic zoom bubble.

chrome/browser/ui/cocoa/location_bar/zoom_decoration.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/location_bar/zoom_decoration.h"
 
 #include "base/string16.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
+#import "chrome/browser/ui/cocoa/browser/zoom_bubble_controller.h"
+#import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
 #import "chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.h"
-#include "chrome/browser/ui/toolbar/toolbar_model.h"
 #include "chrome/browser/ui/zoom/zoom_controller.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
-ZoomDecoration::ZoomDecoration(ToolbarModel* toolbar_model)
-    : toolbar_model_(toolbar_model) {
+ZoomDecoration::ZoomDecoration(LocationBarViewMac* owner)
+    : owner_(owner),
+      bubble_(nil) {
   Update(NULL);
 }
 
 ZoomDecoration::~ZoomDecoration() {
 }
 
 void ZoomDecoration::Update(ZoomController* zoom_controller) {
-  if (!zoom_controller || zoom_controller->IsAtDefaultZoom() ||
-      toolbar_model_->GetInputInProgress()) {
-    // TODO(dbeam): hide zoom bubble when it exists.
+  if (!zoom_controller || zoom_controller->IsAtDefaultZoom()) {
+    [bubble_ close];
     SetVisible(false);
     return;
   }
 
   SetImage(OmniboxViewMac::ImageForResource(
       zoom_controller->GetResourceForZoomLevel()));
 
   string16 zoom_percent = base::IntToString16(zoom_controller->zoom_percent());
   NSString* zoom_string =
       l10n_util::GetNSStringFWithFixup(IDS_TOOLTIP_ZOOM, zoom_percent);
   tooltip_.reset([zoom_string retain]);
 
   SetVisible(true);
+
+  [bubble_ onZoomChanged];

[sail, 2013/02/15 21:05:12]

Do you need to allocate ZoomBubbleController here?

[Robert Sesek, 2013/02/15 21:39:20]

Nope. Not yet, c.f. CL description.

+}
+
+NSPoint ZoomDecoration::GetBubblePointInFrame(NSRect frame) {
+  NSSize image_size = [GetImage() size];
+  frame.origin.x += frame.size.width - image_size.width;

[sail, 2013/02/15 21:05:12]

This code would be easier to understand if it didn't reuse frame. Something
like:

NSRect image_frame;
image_frame.size = [GetImage() size];
image_frame.origin.x = NSMaxX(frame) - NSWidth(image_frame);
image_frame.origin.y = NSMinY(frame);

[Robert Sesek, 2013/02/15 21:39:20]

This code is literally copied and pasted from another decoration.

+  frame.size = image_size;
+
+  const NSRect draw_frame = GetDrawRectInFrame(frame);
+  return NSMakePoint(NSMidX(draw_frame), NSMaxY(draw_frame));
 }
 
 bool ZoomDecoration::AcceptsMousePress() {
   return true;
 }
 
+bool ZoomDecoration::OnMousePressed(NSRect frame) {
+  content::WebContents* web_contents = owner_->GetWebContents();
+  if (!web_contents)
+    return true;
+
+  // Find point for bubble's arrow in screen coordinates.
+  AutocompleteTextField* field = owner_->GetAutocompleteTextField();
+  NSPoint anchor = GetBubblePointInFrame(frame);
+  anchor = [field convertPoint:anchor toView:nil];
+  anchor = [[field window] convertBaseToScreen:anchor];
+
+  if (!bubble_) {
+    void(^observer)(ZoomBubbleController*) = ^(ZoomBubbleController*) {
+        bubble_ = nil;
+    };
+    bubble_ =
+        [[ZoomBubbleController alloc] initWithParentWindow:[field window]
+                                             closeObserver:observer];
+  }
+
+  [bubble_ showForWebContents:web_contents
+                   anchoredAt:anchor
+                    autoClose:NO];
+
+  return true;
+}
+
 NSString* ZoomDecoration::GetToolTip() {
   return tooltip_.get();
 }