[Mac] Redesign of the avatar menu button

chrome/browser/ui/cocoa/browser/avatar_button_controller.mm

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 2014 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/browser/avatar_button_controller.h"
 
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/command_updater.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/profiles/profile_info_cache.h"
-#include "chrome/browser/profiles/profile_info_util.h"
+#include "chrome/browser/profiles/profile_info_cache_observer.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/browser/profiles/profiles_state.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_window.h"
-#import "chrome/browser/ui/cocoa/browser/avatar_label_button.h"
+#import "chrome/browser/ui/cocoa/base_bubble_controller.h"
 #import "chrome/browser/ui/cocoa/browser/avatar_menu_bubble_controller.h"
-#import "chrome/browser/ui/cocoa/base_bubble_controller.h"
 #import "chrome/browser/ui/cocoa/browser/profile_chooser_controller.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #include "chrome/common/profile_management_switches.h"
-#include "content/public/browser/notification_service.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #include "ui/base/resource/resource_bundle.h"
-#include "ui/gfx/image/image.h"
-#include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
+#include "ui/gfx/text_elider.h"
 
 namespace {
-
 // Space between the avatar icon and the avatar menu bubble.
 const CGFloat kMenuYOffsetAdjust = 1.0;
 
-// Space between the avatar label and the left edge of the container containing
-// the label and the icon.
-const CGFloat kAvatarSpacing = 4;
+NSString* GetElidedProfileName(const base::string16& name) {
+  // Maximum characters the button can be before the text will get elided.
+  const int kMaxCharactersToDisplay = 15;
 
-// Space between the bottom of the avatar icon and the bottom of the avatar
-// label.
-const CGFloat kAvatarLabelBottomSpacing = 3;
-
-// Space between the right edge of the avatar label and the right edge of the
-// avatar icon.
-const CGFloat kAvatarLabelRightSpacing = 2;
+  gfx::FontList font_list = ui::ResourceBundle::GetSharedInstance().GetFontList(
+      ui::ResourceBundle::BaseFont);
+  return base::SysUTF16ToNSString(gfx::ElideText(
+      name,
+      font_list,
+      font_list.GetExpectedTextWidth(kMaxCharactersToDisplay),
+      gfx::ELIDE_AT_END));
+}
 
 }  // namespace
 
 @interface AvatarButtonController (Private)
-- (void)setButtonEnabled:(BOOL)flag;
+// Shows the ProfileMenuController.
 - (IBAction)buttonClicked:(id)sender;
 - (void)bubbleWillClose:(NSNotification*)notif;
-- (NSImage*)compositeImageWithShadow:(NSImage*)image;
-- (void)updateAvatar;
-- (void)addOrRemoveButtonIfNecessary;
+// Updates the profile name displayed by the avatar button. If |layoutParent| is
+// yes, then the BrowserWindowController is notified to relayout the subviews,
+// as the button needs to be repositioned.
+- (void)updateAvatarButtonAndLayoutParent:(BOOL)layoutParent;
 @end
 
-// Declare a 10.7+ private API.
-// NSThemeFrame < NSTitledFrame < NSFrameView < NSView.
-@interface NSView (NSThemeFrame)
-- (void)_tileTitlebarAndRedisplay:(BOOL)redisplay;
-@end
-
-namespace AvatarButtonControllerInternal {
-
-class Observer : public content::NotificationObserver {
+class ProfileInfoUpdateObserver : public ProfileInfoCacheObserver {
  public:
-  Observer(AvatarButtonController* button) : button_(button) {
-    registrar_.Add(this, chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED,
-                   content::NotificationService::AllSources());
+  ProfileInfoUpdateObserver(AvatarButtonController* avatarButton)
+      : avatarButton_(avatarButton) {
+    g_browser_process->profile_manager()->
+        GetProfileInfoCache().AddObserver(this);
   }
 
-  // NotificationObserver:
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE {
-    switch (type) {
-      case chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED:
-        [button_ updateAvatar];
-        [button_ addOrRemoveButtonIfNecessary];
-        break;
-      default:
-        NOTREACHED();
-        break;
-    }
+  virtual ~ProfileInfoUpdateObserver() {
+    g_browser_process->profile_manager()->
+        GetProfileInfoCache().RemoveObserver(this);
+  }
+
+  // ProfileInfoCacheObserver:
+  virtual void OnProfileAdded(const base::FilePath& profile_path) OVERRIDE {
+    [avatarButton_ updateAvatarButtonAndLayoutParent:YES];
+  }
+
+  virtual void OnProfileWasRemoved(
+      const base::FilePath& profile_path,
+      const base::string16& profile_name) OVERRIDE {
+    [avatarButton_ updateAvatarButtonAndLayoutParent:YES];
+  }
+  virtual void OnProfileNameChanged(
+      const base::FilePath& profile_path,
+      const base::string16& old_profile_name) OVERRIDE {
+    [avatarButton_ updateAvatarButtonAndLayoutParent:YES];
+  }
+  virtual void OnProfileAvatarChanged(
+      const base::FilePath& profile_path) OVERRIDE {
+    [avatarButton_ updateAvatarButtonAndLayoutParent:YES];
   }
 
  private:
-  content::NotificationRegistrar registrar_;
+  AvatarButtonController* avatarButton_;  // Weak; owns this.
 
-  AvatarButtonController* button_;  // Weak; owns this.
+  DISALLOW_COPY_AND_ASSIGN(ProfileInfoUpdateObserver);
 };
 
-}  // namespace AvatarButtonControllerInternal
+@implementation AvatarButtonController
 
-////////////////////////////////////////////////////////////////////////////////
-
-@implementation AvatarButtonController
+- (id)init {
+  if ((self = [super init]))
+    profileInfoObserver_.reset(new ProfileInfoUpdateObserver(self));
+  return self;
+}
 
 - (id)initWithBrowser:(Browser*)browser {
   if ((self = [super init])) {
     browser_ = browser;
+    profileInfoObserver_.reset(new ProfileInfoUpdateObserver(self));
 
-    base::scoped_nsobject<NSView> container(
-        [[NSView alloc] initWithFrame:NSMakeRect(
-            0, 0, profiles::kAvatarIconWidth, profiles::kAvatarIconHeight)]);
+    base::scoped_nsobject<NSView> container([[NSView alloc]
+        initWithFrame:NSZeroRect]);
     [self setView:container];
-    button_.reset([[NSButton alloc] initWithFrame:NSMakeRect(
-        0, 0, profiles::kAvatarIconWidth, profiles::kAvatarIconHeight)]);
-    NSButtonCell* cell = [button_ cell];
-    [button_ setButtonType:NSMomentaryLightButton];
 
-    [button_ setImagePosition:NSImageOnly];
-    [cell setImageScaling:NSImageScaleProportionallyDown];
-    [cell setImagePosition:NSImageBelow];
-
-    // AppKit sets a title for some reason when using |-setImagePosition:|.
-    [button_ setTitle:nil];
-
-    [cell setImageDimsWhenDisabled:NO];
-    [cell setHighlightsBy:NSContentsCellMask];
-    [cell setShowsStateBy:NSContentsCellMask];
-
-    [button_ setBordered:NO];
+    button_.reset([[NSButton alloc] initWithFrame:NSZeroRect]);
+    [button_ setBezelStyle:NSTexturedRoundedBezelStyle];
+    [button_ setImage:ui::ResourceBundle::GetSharedInstance().
+        GetNativeImageNamed(IDR_APP_DROPARROW).ToNSImage()];
+    [button_ setImagePosition:NSImageRight];
+    [button_ setAutoresizingMask:NSViewMinXMargin | NSViewMinYMargin];
     [button_ setTarget:self];
     [button_ setAction:@selector(buttonClicked:)];
 
-    [cell accessibilitySetOverrideValue:NSAccessibilityButtonRole
-                           forAttribute:NSAccessibilityRoleAttribute];
-    [cell accessibilitySetOverrideValue:
-        NSAccessibilityRoleDescription(NSAccessibilityButtonRole, nil)
-          forAttribute:NSAccessibilityRoleDescriptionAttribute];
-    [cell accessibilitySetOverrideValue:
-        l10n_util::GetNSString(IDS_PROFILES_BUBBLE_ACCESSIBLE_NAME)
-                           forAttribute:NSAccessibilityTitleAttribute];
-    [cell accessibilitySetOverrideValue:
-        l10n_util::GetNSString(IDS_PROFILES_BUBBLE_ACCESSIBLE_DESCRIPTION)
-                           forAttribute:NSAccessibilityHelpAttribute];
-    [cell accessibilitySetOverrideValue:
-        l10n_util::GetNSString(IDS_PROFILES_BUBBLE_ACCESSIBLE_DESCRIPTION)
-                           forAttribute:NSAccessibilityDescriptionAttribute];
+    [self updateAvatarButtonAndLayoutParent:NO];
 
-    Profile* profile = browser_->profile();
-
-    if (profile->IsOffTheRecord() || profile->IsGuestSession()) {
-      const int icon_id = profile->IsGuestSession() ? IDR_LOGIN_GUEST :
-                                                      IDR_OTR_ICON;
-      NSImage* icon = ResourceBundle::GetSharedInstance().GetNativeImageNamed(
-          icon_id).ToNSImage();
-      [self setImage:[self compositeImageWithShadow:icon]];
-      [self setButtonEnabled:profile->IsGuestSession()];
-   } else {
-      [self setButtonEnabled:YES];
-      observer_.reset(new AvatarButtonControllerInternal::Observer(self));
-      [self updateAvatar];
-
-      // Managed users cannot enter incognito mode, so we only need to check
-      // it in this code path.
-      if (profile->IsManaged()) {
-        // Initialize the avatar label button.
-        CGFloat extraWidth =
-            profiles::kAvatarIconWidth + kAvatarLabelRightSpacing;
-        NSRect frame = NSMakeRect(
-            kAvatarSpacing, kAvatarLabelBottomSpacing, extraWidth, 0);
-        labelButton_.reset([[AvatarLabelButton alloc] initWithFrame:frame]);
-        [labelButton_ setTarget:self];
-        [labelButton_ setAction:@selector(buttonClicked:)];
-        [[self view] addSubview:labelButton_];
-
-        // Resize the container and reposition the avatar button.
-        NSSize textSize = [[labelButton_ cell] labelTextSize];
-        [container setFrameSize:
-            NSMakeSize([labelButton_ frame].size.width + kAvatarSpacing,
-                       profiles::kAvatarIconHeight)];
-        [button_
-            setFrameOrigin:NSMakePoint(kAvatarSpacing + textSize.width, 0)];
-      }
-    }
     [[self view] addSubview:button_];
   }
   return self;
 }
 
 - (void)dealloc {
   [[NSNotificationCenter defaultCenter]
       removeObserver:self
                 name:NSWindowWillCloseNotification
               object:[menuController_ window]];
   [super dealloc];
 }
 
 - (NSButton*)buttonView {
   return button_.get();
 }
 
-- (NSButton*)labelButtonView {
-  return labelButton_.get();
-}
-
-- (void)setImage:(NSImage*)image {
-  [button_ setImage:image];
-}
-
 - (void)showAvatarBubble:(NSView*)anchor {
   if (menuController_)
     return;
 
   DCHECK(chrome::IsCommandEnabled(browser_, IDC_SHOW_AVATAR_MENU));
 
   NSWindowController* wc =
       [browser_->window()->GetNativeWindow() windowController];
   if ([wc isKindOfClass:[BrowserWindowController class]]) {
     [static_cast<BrowserWindowController*>(wc)
         lockBarVisibilityForOwner:self withAnimation:NO delay:NO];
   }
 
   NSPoint point = NSMakePoint(NSMidX([anchor bounds]),
                               NSMaxY([anchor bounds]) - kMenuYOffsetAdjust);
   point = [anchor convertPoint:point toView:nil];
   point = [[anchor window] convertBaseToScreen:point];
 
   // |menuController_| will automatically release itself on close.
   if (switches::IsNewProfileManagement()) {
     menuController_ =
       [[ProfileChooserController alloc] initWithBrowser:browser_
                                              anchoredAt:point];
   } else {
     menuController_ =
       [[AvatarMenuBubbleController alloc] initWithBrowser:browser_
                                                anchoredAt:point];
   }
+
   [[NSNotificationCenter defaultCenter]
       addObserver:self
          selector:@selector(bubbleWillClose:)
              name:NSWindowWillCloseNotification
            object:[menuController_ window]];
   [menuController_ showWindow:self];
 
   ProfileMetrics::LogProfileOpenMethod(ProfileMetrics::ICON_AVATAR_BUBBLE);
 }
 
-// Private /////////////////////////////////////////////////////////////////////
-
-- (void)setButtonEnabled:(BOOL)flag {
-  [button_ setEnabled:flag];
-}
-
 - (IBAction)buttonClicked:(id)sender {
-  DCHECK(sender == button_.get() || sender == labelButton_.get());
+  DCHECK(sender == button_.get());
   [self showAvatarBubble:button_];
 }
 
 - (void)bubbleWillClose:(NSNotification*)notif {
   NSWindowController* wc =
       [browser_->window()->GetNativeWindow() windowController];
   if ([wc isKindOfClass:[BrowserWindowController class]]) {
     [static_cast<BrowserWindowController*>(wc)
         releaseBarVisibilityForOwner:self withAnimation:YES delay:NO];
   }
   menuController_ = nil;
 }
 
-// This will take in an original image and redraw it with a shadow.
-- (NSImage*)compositeImageWithShadow:(NSImage*)image {
-  gfx::ScopedNSGraphicsContextSaveGState scopedGState;
+- (void)updateAvatarButtonAndLayoutParent:(BOOL)layoutParent {
+  [button_ setTitle:GetElidedProfileName(
+      profiles::GetActiveProfileDisplayName(browser_))];
+  [button_ sizeToFit];
 
-  base::scoped_nsobject<NSImage> destination(
-      [[NSImage alloc] initWithSize:[image size]]);
+  // Resize the container.
+  [[self view] setFrameSize:[button_ frame].size];
+  [button_ setFrameOrigin:NSMakePoint(0, 0)];
 
-  NSRect destRect = NSZeroRect;
-  destRect.size = [destination size];
-
-  [destination lockFocus];
-
-  base::scoped_nsobject<NSShadow> shadow([[NSShadow alloc] init]);
-  [shadow.get() setShadowColor:[NSColor colorWithCalibratedWhite:0.0
-                                                           alpha:0.75]];
-  [shadow.get() setShadowOffset:NSZeroSize];
-  [shadow.get() setShadowBlurRadius:3.0];
-  [shadow.get() set];
-
-  [image drawInRect:destRect
-           fromRect:NSZeroRect
-          operation:NSCompositeSourceOver
-           fraction:1.0
-     respectFlipped:YES
-              hints:nil];
-
-  [destination unlockFocus];
-
-  return destination.autorelease();
+  if (layoutParent) {
+    // Because the width of the button might have changed, the parent browser
+    // frame needs to recalculate the button bounds and redraw it.
+    [[BrowserWindowController
+        browserWindowControllerForWindow:browser_->window()->GetNativeWindow()]
+        layoutSubviews];
+  }
 }
 
-// Updates the avatar information from the profile cache.
-- (void)updateAvatar {
-  ProfileInfoCache& cache =
-      g_browser_process->profile_manager()->GetProfileInfoCache();
-  size_t index =
-      cache.GetIndexOfProfileWithPath(browser_->profile()->GetPath());
-  if (index == std::string::npos)
-    return;
-  BOOL is_gaia_picture =
-      cache.IsUsingGAIAPictureOfProfileAtIndex(index) &&
-      cache.GetGAIAPictureOfProfileAtIndex(index);
-  gfx::Image icon = profiles::GetAvatarIconForTitleBar(
-      cache.GetAvatarIconOfProfileAtIndex(index), is_gaia_picture,
-      profiles::kAvatarIconWidth, profiles::kAvatarIconHeight);
-  [self setImage:icon.ToNSImage()];
-
-  const base::string16& name = cache.GetNameOfProfileAtIndex(index);
-  NSString* nsName = base::SysUTF16ToNSString(name);
-  [button_ setToolTip:nsName];
-  [[button_ cell]
-      accessibilitySetOverrideValue:nsName
-                       forAttribute:NSAccessibilityValueAttribute];
-}
-
-// If the second-to-last profile was removed or a second profile was added,
-// show or hide the avatar button from the window frame.
-- (void)addOrRemoveButtonIfNecessary {
-  if (browser_->profile()->IsOffTheRecord())
-    return;
-
-  NSWindowController* wc =
-      [browser_->window()->GetNativeWindow() windowController];
-  if (![wc isKindOfClass:[BrowserWindowController class]])
-    return;
-
-  size_t count = g_browser_process->profile_manager()->GetNumberOfProfiles();
-  [self.view setHidden:count < 2];
-
-  [static_cast<BrowserWindowController*>(wc) layoutSubviews];
-
-  // If the avatar is being added or removed, then the Lion fullscreen button
-  // needs to be adjusted. Since the fullscreen button is positioned by
-  // FramedBrowserWindow using private APIs, the easiest way to update the
-  // position of the button is through this private API. Resizing the window
-  // also works, but invoking |-display| does not.
-  NSView* themeFrame = [[[wc window] contentView] superview];
-  if ([themeFrame respondsToSelector:@selector(_tileTitlebarAndRedisplay:)])
-    [themeFrame _tileTitlebarAndRedisplay:YES];
-}
-
-// Testing /////////////////////////////////////////////////////////////////////
-
 - (BaseBubbleController*)menuController {
   return menuController_;
 }
 
 @end