[Mac] Support for Touch Bar Customization

chrome/browser/ui/cocoa/browser_window_touch_bar.mm

 // Copyright 2017 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_window_touch_bar.h"
 
 #include <memory>
 
 #include "base/mac/mac_util.h"
 #import "base/mac/scoped_nsobject.h"
@@ skipping 36 matching lines @@
   RELOAD,
   HOME,
   SEARCH,
   STAR,
   NEW_TAB,
   TOUCH_BAR_ACTION_COUNT
 };
 
 // The touch bar's identifier.
 const NSTouchBarCustomizationIdentifier kBrowserWindowTouchBarId =
-    @"BrowserWindowTouchBarId";
+    @"com.google.chrome.browser-window";

[Robert Sesek, 2017/04/13 18:45:32]

Why the change to reverse-domain notation?

[spqchan, 2017/04/13 21:13:50]

In this link: https://developer.apple.com/reference/appkit/nstouchbar

"To make an NSTouchBar object eligible for customization, assign it a
globally-unique customizationIdentifier identifier. For the identifier string,
use reverse-DNS style, such as “com.company-name.app-name.alphanumeric-ID”."

[Robert Sesek, 2017/04/14 16:56:20]

Okay, then I'd actually recommend formatting with base::mac::BaseBundleID()
instead of hard-coding the bundle ID.

 
 // Touch bar items identifiers.
-const NSTouchBarItemIdentifier kBackForwardTouchId = @"BackForwardTouchId";
-const NSTouchBarItemIdentifier kReloadOrStopTouchId = @"ReloadOrStopTouchId";
-const NSTouchBarItemIdentifier kHomeTouchId = @"HomeTouchId";
-const NSTouchBarItemIdentifier kSearchTouchId = @"SearchTouchId";
-const NSTouchBarItemIdentifier kStarTouchId = @"StarTouchId";
-const NSTouchBarItemIdentifier kNewTabTouchId = @"NewTabTouchId";
+const NSTouchBarItemIdentifier kBackForwardTouchId =
+    @"com.google.chrome.browser-window-BACK-FWD";
+const NSTouchBarItemIdentifier kReloadOrStopTouchId =
+    @"com.google.chrome.browser-window-RELOAD-STOP";
+const NSTouchBarItemIdentifier kHomeTouchId =
+    @"com.google.chrome.browser-window-HOME";
+const NSTouchBarItemIdentifier kSearchTouchId =
+    @"com.google.chrome.browser-window--SEARCH";
+const NSTouchBarItemIdentifier kStarTouchId =
+    @"com.google.chrome.browser-window-BOOKMARK";
+const NSTouchBarItemIdentifier kNewTabTouchId =
+    @"com.google.chrome.browser-window-NEW-TAB";
 
 // The button indexes in the back and forward segment control.
 const int kBackSegmentIndex = 0;
 const int kForwardSegmentIndex = 1;
 
 // Touch bar icon colors values.
 const SkColor kTouchBarDefaultIconColor = SK_ColorWHITE;
 const SkColor kTouchBarStarActiveColor = gfx::kGoogleBlue500;
 
 // The size of the touch bar icons.
 const int kTouchBarIconSize = 16;
 
-// The width of the search button in the touch bar.
-const int kSearchBtnWidthWithHomeBtn = 205;
-const int kSearchBtnWidthWithoutHomeBtn = 280;
+// The min width of the search button in the touch bar.
+const int kSearchBtnMinWidth = 205;
 
 // Creates an NSImage from the given VectorIcon.
 NSImage* CreateNSImageFromIcon(const gfx::VectorIcon& icon,
                                SkColor color = kTouchBarDefaultIconColor) {
   return NSImageFromImageSkiaWithColorSpace(
       gfx::CreateVectorIcon(icon, kTouchBarIconSize, color),
       base::mac::GetSRGBColorSpace());
 }
 
 // Creates a NSButton for the touch bar.
@@ skipping 108 matching lines @@
   return self;
 }
 
 - (NSTouchBar*)makeTouchBar {
   if (!base::FeatureList::IsEnabled(features::kBrowserTouchBar))
     return nil;
 
   base::scoped_nsobject<NSTouchBar> touchBar(
       [[NSClassFromString(@"NSTouchBar") alloc] init]);
   NSArray* touchBarItemIdentifiers;
+  NSArray* customTouchBarItemIdentifiers = @[
+    kBackForwardTouchId, kReloadOrStopTouchId, kHomeTouchId, kSearchTouchId,
+    kStarTouchId, kNewTabTouchId, NSTouchBarItemIdentifierFlexibleSpace
+  ];
   if (showHomeButton_.GetValue()) {
     touchBarItemIdentifiers = @[
       kBackForwardTouchId, kReloadOrStopTouchId, kHomeTouchId, kSearchTouchId,
       kStarTouchId, kNewTabTouchId
     ];
   } else {
     touchBarItemIdentifiers = @[
       kBackForwardTouchId, kReloadOrStopTouchId, kSearchTouchId, kStarTouchId,
       kNewTabTouchId
     ];
   }
 
   [touchBar setCustomizationIdentifier:kBrowserWindowTouchBarId];
   [touchBar setDefaultItemIdentifiers:touchBarItemIdentifiers];
-  [touchBar setCustomizationAllowedItemIdentifiers:touchBarItemIdentifiers];
+  [touchBar
+      setCustomizationAllowedItemIdentifiers:customTouchBarItemIdentifiers];
   [touchBar setDelegate:self];
 
   return touchBar.autorelease();
 }
 
 - (NSTouchBarItem*)touchBar:(NSTouchBar*)touchBar
       makeItemForIdentifier:(NSTouchBarItemIdentifier)identifier {
   if (!touchBar)
     return nil;
 
   base::scoped_nsobject<NSCustomTouchBarItem> touchBarItem([[NSClassFromString(
       @"NSCustomTouchBarItem") alloc] initWithIdentifier:identifier]);
   if ([identifier isEqualTo:kBackForwardTouchId]) {
     [touchBarItem setView:[self backOrForwardTouchBarView]];
+    [touchBarItem setCustomizationLabel:
+                      l10n_util::GetNSString(
+                          IDS_TOUCH_BAR_BACK_FORWARD_CUSTOMIZATION_LABEL)];
   } else if ([identifier isEqualTo:kReloadOrStopTouchId]) {
     const gfx::VectorIcon& icon =
         isPageLoading_ ? kNavigateStopIcon : kNavigateReloadIcon;
     int commandId = isPageLoading_ ? IDC_STOP : IDC_RELOAD;
     int tooltipId = isPageLoading_ ? IDS_TOOLTIP_STOP : IDS_TOOLTIP_RELOAD;
     [touchBarItem
         setView:CreateTouchBarButton(icon, self, commandId, tooltipId)];
+    [touchBarItem setCustomizationLabel:
+                      l10n_util::GetNSString(
+                          IDS_TOUCH_BAR_STOP_RELOAD_CUSTOMIZATION_LABEL)];
   } else if ([identifier isEqualTo:kHomeTouchId]) {
     [touchBarItem setView:CreateTouchBarButton(kNavigateHomeIcon, self,
                                                IDC_HOME, IDS_TOOLTIP_HOME)];
+    [touchBarItem
+        setCustomizationLabel:l10n_util::GetNSString(
+                                  IDS_TOUCH_BAR_HOME_CUSTOMIZATION_LABEL)];
   } else if ([identifier isEqualTo:kNewTabTouchId]) {
     [touchBarItem
         setView:CreateTouchBarButton(kNewTabMacTouchbarIcon, self, IDC_NEW_TAB,
                                      IDS_TOOLTIP_NEW_TAB)];
+    [touchBarItem
+        setCustomizationLabel:l10n_util::GetNSString(
+                                  IDS_TOUCH_BAR_NEW_TAB_CUSTOMIZATION_LABEL)];
   } else if ([identifier isEqualTo:kStarTouchId]) {
     const gfx::VectorIcon& icon =
         isStarred_ ? toolbar::kStarActiveIcon : toolbar::kStarIcon;
     SkColor iconColor =
         isStarred_ ? kTouchBarStarActiveColor : kTouchBarDefaultIconColor;
     int tooltipId = isStarred_ ? IDS_TOOLTIP_STARRED : IDS_TOOLTIP_STAR;
     [touchBarItem setView:CreateTouchBarButton(icon, self, IDC_BOOKMARK_PAGE,
                                                tooltipId, iconColor)];
+    [touchBarItem
+        setCustomizationLabel:l10n_util::GetNSString(
+                                  IDS_TOUCH_BAR_BOOKMARK_CUSTOMIZATION_LABEL)];
   } else if ([identifier isEqualTo:kSearchTouchId]) {
     [touchBarItem setView:[self searchTouchBarView]];
+    [touchBarItem setCustomizationLabel:l10n_util::GetNSString(
+                                            IDS_TOUCH_BAR_GOOGLE_SEARCH)];
   }
 
   return touchBarItem.autorelease();
 }
 
 - (NSView*)backOrForwardTouchBarView {
   NSArray* images = @[
     CreateNSImageFromIcon(ui::kBackArrowIcon),
     CreateNSImageFromIcon(ui::kForwardArrowIcon)
   ];
@@ skipping 50 matching lines @@
     image = CreateNSImageFromIcon(ui::kSearchIcon);
   }
 
   NSButton* searchButton =
       [NSButton buttonWithTitle:base::SysUTF16ToNSString(title)
                           image:image
                          target:self
                          action:@selector(executeCommand:)];
   searchButton.imageHugsTitle = YES;
   searchButton.tag = IDC_FOCUS_LOCATION;
-  int width = showHomeButton_.GetValue() ? kSearchBtnWidthWithHomeBtn
-                                         : kSearchBtnWidthWithoutHomeBtn;
-  [searchButton.widthAnchor constraintEqualToConstant:width].active = YES;
+  [searchButton.widthAnchor
+      constraintGreaterThanOrEqualToConstant:kSearchBtnMinWidth]
+      .active = YES;
+  [searchButton
+      setContentHuggingPriority:1.0
+                 forOrientation:NSLayoutConstraintOrientationHorizontal];
   return searchButton;
 }
 
 - (void)backOrForward:(id)sender {
   NSSegmentedControl* control = sender;
   int command =
       [control selectedSegment] == kBackSegmentIndex ? IDC_BACK : IDC_FORWARD;
   LogTouchBarUMA(command);
   commandUpdater_->ExecuteCommand(command);
 }
 
 - (void)executeCommand:(id)sender {
   int command = [sender tag];
   LogTouchBarUMA(command);
   commandUpdater_->ExecuteCommand(command);
 }
 
 @end