[Mac] Adds grippys to the left side of the Browser Actions container to resiz...

chrome/browser/cocoa/extensions/browser_actions_container_view.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.
 
+#import "base/scoped_nsobject.h"
+#import "chrome/browser/cocoa/extensions/browser_action_button.h"
 #import "chrome/browser/cocoa/extensions/browser_actions_container_view.h"
 
 namespace {
+  const CGFloat kGrippyLowerPadding = 4.0;
+  const CGFloat kGrippyUpperPadding = 8.0;
+  const CGFloat kRightBorderXOffset = -1.0;
   const CGFloat kRightBorderWidth = 1.0;
   const CGFloat kRightBorderGrayscale = 0.5;
   const CGFloat kUpperPadding = 9.0;
   const CGFloat kLowerPadding = 5.0;
 }  // namespace
 
+@interface BrowserActionsContainerView(Private)
+- (void)drawLeftGrippers;
+@end
+
 @implementation BrowserActionsContainerView
 
 @synthesize rightBorderShown = rightBorderShown_;
 
 - (void)drawRect:(NSRect)dirtyRect {
   NSRect bounds = [self bounds];
   if (rightBorderShown_) {
     NSColor* middleColor =
         [NSColor colorWithCalibratedWhite:kRightBorderGrayscale alpha:1.0];
     NSColor* endPointColor =
         [NSColor colorWithCalibratedWhite:kRightBorderGrayscale alpha:0.0];
     NSGradient* borderGradient = [[[NSGradient alloc]
         initWithColorsAndLocations:endPointColor, (CGFloat)0.0,
                                    middleColor, (CGFloat)0.5,
                                    endPointColor, (CGFloat)1.0,
                                    nil] autorelease];
-    CGFloat xPos = bounds.origin.x + bounds.size.width - kRightBorderWidth;
+    CGFloat xPos = bounds.origin.x + bounds.size.width - kRightBorderWidth +
+        kRightBorderXOffset;
     NSRect borderRect = NSMakeRect(xPos, kLowerPadding, kRightBorderWidth,
         bounds.size.height - kUpperPadding);
     [borderGradient drawInRect:borderRect angle:90.0];
   }
+
+  [self drawLeftGrippers];
+}
+
+- (void)drawLeftGrippers {
+  NSRect grippyRect = NSMakeRect(0.0, kLowerPadding + kGrippyLowerPadding, 1.0,
+      [self bounds].size.height - kUpperPadding - kGrippyUpperPadding);
+  [[NSColor colorWithCalibratedWhite:0.7 alpha:0.5] set];
+  NSRectFill(grippyRect);
+
+  [[NSColor colorWithCalibratedWhite:1.0 alpha:1.0] set];
+  grippyRect.origin.x += 1.0;
+  NSRectFill(grippyRect);
+
+  grippyRect.origin.x += 1.0;
+
+  [[NSColor colorWithCalibratedWhite:0.7 alpha:0.5] set];
+  grippyRect.origin.x += 1.0;
+  NSRectFill(grippyRect);
+
+  [[NSColor colorWithCalibratedWhite:1.0 alpha:1.0] set];
+  grippyRect.origin.x += 1.0;
+  NSRectFill(grippyRect);
+}
+
+- (BrowserActionButton*)buttonAtIndex:(NSUInteger)index {
+  return [[self subviews] objectAtIndex:index];
 }
 
 @end