[Mac] Hover/Pressed background for the Omnibox decorations

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

 // 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 <cmath>
 
 #import "chrome/browser/ui/cocoa/location_bar/bubble_decoration.h"
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
@@ skipping 13 matching lines @@
 
 // Additional padding between the divider and the label.
 const CGFloat kDividerPadding = 6.0;
 
 // Padding between the icon and label.
 const CGFloat kIconLabelPadding = 4.0;
 
 // Inset for the image frame.
 const CGFloat kImageFrameYInset = 4.0;
 
+// Inset for the background frame.
+const CGFloat kBackgroundFrameYInset = 2.0;
+
+// Left margin for the background frame.
+const CGFloat kBackgroundFrameLeftMargin = 1.0;
+
 }  // namespace
 
 BubbleDecoration::BubbleDecoration() : retina_baseline_offset_(0) {
   attributes_.reset([[NSMutableDictionary alloc] init]);
   [attributes_ setObject:LocationBarDecoration::GetFont()
                   forKey:NSFontAttributeName];
 }
 
 BubbleDecoration::~BubbleDecoration() {
 }
@@ skipping 42 matching lines @@
   if (all_width <= width)
     return all_width;
 
   const CGFloat image_width = GetWidthForImageAndLabel(image_, nil);
   if (image_width <= width)
     return image_width;
 
   return kOmittedWidth;
 }
 
+NSRect BubbleDecoration::GetBackgroundFrame(NSRect frame) {
+  NSRect background_frame = NSInsetRect(frame, 0.0, kBackgroundFrameYInset);
+  background_frame.origin.x += kBackgroundFrameLeftMargin;
+  background_frame.size.width -= kDividerPadding;
+  return background_frame;
+}
+
 void BubbleDecoration::DrawInFrame(NSRect frame, NSView* control_view) {
   const NSRect decoration_frame = NSInsetRect(frame, 0.0, kImageFrameYInset);
   CGFloat text_offset = NSMinX(decoration_frame);
   if (image_) {
     // Center the image vertically.
     const NSSize image_size = [image_ size];
     NSRect image_rect = decoration_frame;
     image_rect.origin.x += kLeftSidePadding;
     image_rect.origin.y +=
         std::floor((NSHeight(decoration_frame) - image_size.height) / 2.0);
@@ skipping 64 matching lines @@
   [attributes_ setObject:text_color forKey:NSForegroundColorAttributeName];
 }
 
 void BubbleDecoration::SetFont(NSFont* font) {
   [attributes_ setObject:font forKey:NSFontAttributeName];
 }
 
 void BubbleDecoration::SetRetinaBaselineOffset(CGFloat offset) {
   retina_baseline_offset_ = offset;
 }