1 files changed, 605 insertions, 0 deletions
diff --git a/widget/cocoa/nsTouchBar.mm b/widget/cocoa/nsTouchBar.mm
new file mode 100644
index 0000000000..f6a7042381
--- /dev/null
+++ b/widget/cocoa/nsTouchBar.mm
@@ -0,0 +1,605 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsTouchBar.h"
+
+#include <objc/runtime.h>
+
+#include "mozilla/MacStringHelpers.h"
+#include "mozilla/dom/Document.h"
+#include "nsArrayUtils.h"
+#include "nsCocoaUtils.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsIArray.h"
+#include "nsTouchBarInputIcon.h"
+#include "nsWidgetsCID.h"
+
+@implementation nsTouchBar
+
+// Used to tie action strings to buttons.
+static char sIdentifierAssociationKey;
+
+// The default space between inputs, used where layout is not automatic.
+static const uint32_t kInputSpacing = 8;
+// The width of buttons in Apple's Share ScrollView. We use this in our
+// ScrollViews to give them a native appearance.
+static const uint32_t kScrollViewButtonWidth = 144;
+static const uint32_t kInputIconSize = 16;
+
+// The system default width for Touch Bar inputs is 128px. This is double.
+#define MAIN_BUTTON_WIDTH 256
+
+#pragma mark - NSTouchBarDelegate
+
+- (instancetype)init {
+  return [self initWithInputs:nil];
+}
+
+- (instancetype)initWithInputs:(NSMutableArray<TouchBarInput*>*)aInputs {
+  if ((self = [super init])) {
+    mTouchBarHelper = do_GetService(NS_TOUCHBARHELPER_CID);
+    if (!mTouchBarHelper) {
+      NS_ERROR("Unable to create Touch Bar Helper.");
+      return nil;
+    }
+
+    self.delegate = self;
+    self.mappedLayoutItems = [NSMutableDictionary dictionary];
+    self.customizationAllowedItemIdentifiers = @[];
+
+    if (!aInputs) {
+      // This customization identifier is how users' custom layouts are saved by macOS.
+      // If this changes, all users' layouts would be reset to the default layout.
+      self.customizationIdentifier =
+          [kTouchBarBaseIdentifier stringByAppendingPathExtension:@"defaultbar"];
+      nsCOMPtr<nsIArray> allItems;
+
+      nsresult rv = mTouchBarHelper->GetAllItems(getter_AddRefs(allItems));
+      if (NS_FAILED(rv) || !allItems) {
+        return nil;
+      }
+
+      uint32_t itemCount = 0;
+      allItems->GetLength(&itemCount);
+      // This is copied to self.customizationAllowedItemIdentifiers.
+      // Required since [self.mappedItems allKeys] does not preserve order.
+      // One slot is added for the spacer item.
+      NSMutableArray* orderedIdentifiers = [NSMutableArray arrayWithCapacity:itemCount + 1];
+      for (uint32_t i = 0; i < itemCount; ++i) {
+        nsCOMPtr<nsITouchBarInput> input = do_QueryElementAt(allItems, i);
+        if (!input) {
+          continue;
+        }
+
+        TouchBarInput* convertedInput;
+        NSTouchBarItemIdentifier newInputIdentifier =
+            [TouchBarInput nativeIdentifierWithXPCOM:input];
+        if (!newInputIdentifier) {
+          continue;
+        }
+
+        // If there is already an input in mappedLayoutItems with this identifier,
+        // that means updateItem fired before this initialization. The input
+        // cached by updateItem is more current, so we should use that one.
+        if (self.mappedLayoutItems[newInputIdentifier]) {
+          convertedInput = self.mappedLayoutItems[newInputIdentifier];
+        } else {
+          convertedInput = [[TouchBarInput alloc] initWithXPCOM:input];
+          // Add new input to dictionary for lookup of properties in delegate.
+          self.mappedLayoutItems[[convertedInput nativeIdentifier]] = convertedInput;
+        }
+
+        orderedIdentifiers[i] = [convertedInput nativeIdentifier];
+      }
+      [orderedIdentifiers addObject:@"NSTouchBarItemIdentifierFlexibleSpace"];
+      self.customizationAllowedItemIdentifiers = [orderedIdentifiers copy];
+
+      NSArray* defaultItemIdentifiers = @[
+        [TouchBarInput nativeIdentifierWithType:@"button" withKey:@"back"],
+        [TouchBarInput nativeIdentifierWithType:@"button" withKey:@"forward"],
+        [TouchBarInput nativeIdentifierWithType:@"button" withKey:@"reload"],
+        [TouchBarInput nativeIdentifierWithType:@"mainButton" withKey:@"open-location"],
+        [TouchBarInput nativeIdentifierWithType:@"button" withKey:@"new-tab"],
+        [TouchBarInput shareScrubberIdentifier], [TouchBarInput searchPopoverIdentifier]
+      ];
+      self.defaultItemIdentifiers = [defaultItemIdentifiers copy];
+    } else {
+      NSMutableArray* defaultItemIdentifiers = [NSMutableArray arrayWithCapacity:[aInputs count]];
+      for (TouchBarInput* input in aInputs) {
+        self.mappedLayoutItems[[input nativeIdentifier]] = input;
+        [defaultItemIdentifiers addObject:[input nativeIdentifier]];
+      }
+      self.defaultItemIdentifiers = [defaultItemIdentifiers copy];
+    }
+  }
+
+  return self;
+}
+
+- (void)dealloc {
+  for (NSTouchBarItemIdentifier identifier in self.mappedLayoutItems) {
+    NSTouchBarItem* item = [self itemForIdentifier:identifier];
+    if (!item) {
+      continue;
+    }
+    if ([item isKindOfClass:[NSPopoverTouchBarItem class]]) {
+      [(NSPopoverTouchBarItem*)item setCollapsedRepresentationImage:nil];
+      [(nsTouchBar*)[(NSPopoverTouchBarItem*)item popoverTouchBar] release];
+    } else if ([[item view] isKindOfClass:[NSScrollView class]]) {
+      [[(NSScrollView*)[item view] documentView] release];
+      [(NSScrollView*)[item view] release];
+    }
+
+    [item release];
+  }
+
+  [self.defaultItemIdentifiers release];
+  [self.customizationAllowedItemIdentifiers release];
+  [self.scrollViewButtons removeAllObjects];
+  [self.scrollViewButtons release];
+  [self.mappedLayoutItems removeAllObjects];
+  [self.mappedLayoutItems release];
+  [super dealloc];
+}
+
+- (NSTouchBarItem*)touchBar:(NSTouchBar*)aTouchBar
+      makeItemForIdentifier:(NSTouchBarItemIdentifier)aIdentifier {
+  if (!mTouchBarHelper) {
+    return nil;
+  }
+
+  TouchBarInput* input = self.mappedLayoutItems[aIdentifier];
+  if (!input) {
+    return nil;
+  }
+
+  if ([input baseType] == TouchBarInputBaseType::kScrubber) {
+    // We check the identifier rather than the baseType here as a special case.
+    if (![aIdentifier isEqualToString:[TouchBarInput shareScrubberIdentifier]]) {
+      // We're only supporting the Share scrubber for now.
+      return nil;
+    }
+    return [self makeShareScrubberForIdentifier:aIdentifier];
+  }
+
+  if ([input baseType] == TouchBarInputBaseType::kPopover) {
+    NSPopoverTouchBarItem* newPopoverItem =
+        [[NSPopoverTouchBarItem alloc] initWithIdentifier:aIdentifier];
+    [newPopoverItem setCustomizationLabel:[input title]];
+    // We initialize popoverTouchBar here because we only allow setting this
+    // property on popover creation. Updating popoverTouchBar for every update
+    // of the popover item would be very expensive.
+    newPopoverItem.popoverTouchBar = [[nsTouchBar alloc] initWithInputs:[input children]];
+    [self updatePopover:newPopoverItem withIdentifier:[input nativeIdentifier]];
+    return newPopoverItem;
+  }
+
+  // Our new item, which will be initialized depending on aIdentifier.
+  NSCustomTouchBarItem* newItem = [[NSCustomTouchBarItem alloc] initWithIdentifier:aIdentifier];
+  [newItem setCustomizationLabel:[input title]];
+
+  if ([input baseType] == TouchBarInputBaseType::kScrollView) {
+    [self updateScrollView:newItem withIdentifier:[input nativeIdentifier]];
+    return newItem;
+  } else if ([input baseType] == TouchBarInputBaseType::kLabel) {
+    NSTextField* label = [NSTextField labelWithString:@""];
+    [self updateLabel:label withIdentifier:[input nativeIdentifier]];
+    newItem.view = label;
+    return newItem;
+  }
+
+  // The cases of a button or main button require the same setup.
+  NSButton* button = [NSButton buttonWithTitle:@"" target:self action:@selector(touchBarAction:)];
+  newItem.view = button;
+
+  if ([input baseType] == TouchBarInputBaseType::kButton &&
+      ![[input type] hasPrefix:@"scrollView"]) {
+    [self updateButton:newItem withIdentifier:[input nativeIdentifier]];
+  } else if ([input baseType] == TouchBarInputBaseType::kMainButton) {
+    [self updateMainButton:newItem withIdentifier:[input nativeIdentifier]];
+  }
+  return newItem;
+}
+
+- (bool)updateItem:(TouchBarInput*)aInput {
+  if (!mTouchBarHelper) {
+    return false;
+  }
+
+  NSTouchBarItem* item = [self itemForIdentifier:[aInput nativeIdentifier]];
+
+  // If we can't immediately find item, there are three possibilities:
+  //   * It is a button in a ScrollView, or
+  //   * It is contained within a popover, or
+  //   * It simply does not exist.
+  // We check for each possibility here.
+  if (!self.mappedLayoutItems[[aInput nativeIdentifier]]) {
+    if ([self maybeUpdateScrollViewChild:aInput]) {
+      return true;
+    }
+    if ([self maybeUpdatePopoverChild:aInput]) {
+      return true;
+    }
+    return false;
+  }
+
+  // Update our canonical copy of the input.
+  [self replaceMappedLayoutItem:aInput];
+
+  if ([aInput baseType] == TouchBarInputBaseType::kButton) {
+    [(NSCustomTouchBarItem*)item setCustomizationLabel:[aInput title]];
+    [self updateButton:(NSCustomTouchBarItem*)item withIdentifier:[aInput nativeIdentifier]];
+  } else if ([aInput baseType] == TouchBarInputBaseType::kMainButton) {
+    [(NSCustomTouchBarItem*)item setCustomizationLabel:[aInput title]];
+    [self updateMainButton:(NSCustomTouchBarItem*)item withIdentifier:[aInput nativeIdentifier]];
+  } else if ([aInput baseType] == TouchBarInputBaseType::kScrollView) {
+    [(NSCustomTouchBarItem*)item setCustomizationLabel:[aInput title]];
+    [self updateScrollView:(NSCustomTouchBarItem*)item withIdentifier:[aInput nativeIdentifier]];
+  } else if ([aInput baseType] == TouchBarInputBaseType::kPopover) {
+    [(NSPopoverTouchBarItem*)item setCustomizationLabel:[aInput title]];
+    [self updatePopover:(NSPopoverTouchBarItem*)item withIdentifier:[aInput nativeIdentifier]];
+    for (TouchBarInput* child in [aInput children]) {
+      [(nsTouchBar*)[(NSPopoverTouchBarItem*)item popoverTouchBar] updateItem:child];
+    }
+  } else if ([aInput baseType] == TouchBarInputBaseType::kLabel) {
+    [self updateLabel:(NSTextField*)item.view withIdentifier:[aInput nativeIdentifier]];
+  }
+
+  return true;
+}
+
+- (bool)maybeUpdatePopoverChild:(TouchBarInput*)aInput {
+  for (NSTouchBarItemIdentifier identifier in self.mappedLayoutItems) {
+    TouchBarInput* potentialPopover = self.mappedLayoutItems[identifier];
+    if ([potentialPopover baseType] != TouchBarInputBaseType::kPopover) {
+      continue;
+    }
+    NSTouchBarItem* popover = [self itemForIdentifier:[potentialPopover nativeIdentifier]];
+    if (popover) {
+      if ([(nsTouchBar*)[(NSPopoverTouchBarItem*)popover popoverTouchBar] updateItem:aInput]) {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
+- (bool)maybeUpdateScrollViewChild:(TouchBarInput*)aInput {
+  NSCustomTouchBarItem* scrollViewButton = self.scrollViewButtons[[aInput nativeIdentifier]];
+  if (scrollViewButton) {
+    // ScrollView buttons are similar to mainButtons except for their width.
+    [self updateMainButton:scrollViewButton withIdentifier:[aInput nativeIdentifier]];
+    NSButton* button = (NSButton*)scrollViewButton.view;
+    uint32_t buttonSize = MAX(button.attributedTitle.size.width + kInputIconSize + kInputSpacing,
+                              kScrollViewButtonWidth);
+    [[button widthAnchor] constraintGreaterThanOrEqualToConstant:buttonSize].active = YES;
+  }
+  // Updating the TouchBarInput* in the ScrollView's mChildren array.
+  for (NSTouchBarItemIdentifier identifier in self.mappedLayoutItems) {
+    TouchBarInput* potentialScrollView = self.mappedLayoutItems[identifier];
+    if ([potentialScrollView baseType] != TouchBarInputBaseType::kScrollView) {
+      continue;
+    }
+    for (uint32_t i = 0; i < [[potentialScrollView children] count]; ++i) {
+      TouchBarInput* child = [potentialScrollView children][i];
+      if (![[child nativeIdentifier] isEqualToString:[aInput nativeIdentifier]]) {
+        continue;
+      }
+      [[potentialScrollView children] replaceObjectAtIndex:i withObject:aInput];
+      [child release];
+      return true;
+    }
+  }
+  return false;
+}
+
+- (void)replaceMappedLayoutItem:(TouchBarInput*)aItem {
+  [self.mappedLayoutItems[[aItem nativeIdentifier]] release];
+  self.mappedLayoutItems[[aItem nativeIdentifier]] = aItem;
+}
+
+- (void)updateButton:(NSCustomTouchBarItem*)aButton
+      withIdentifier:(NSTouchBarItemIdentifier)aIdentifier {
+  if (!aButton || !aIdentifier) {
+    return;
+  }
+
+  TouchBarInput* input = self.mappedLayoutItems[aIdentifier];
+  if (!input) {
+    return;
+  }
+
+  NSButton* button = (NSButton*)[aButton view];
+  button.title = [input title];
+  if ([input imageURI]) {
+    [button setImagePosition:NSImageOnly];
+    [self loadIconForInput:input forItem:aButton];
+    // Because we are hiding the title, NSAccessibility also does not get it.
+    // Therefore, set an accessibility label as alternative text for image-only buttons.
+    [button setAccessibilityLabel:[input title]];
+  }
+
+  [button setEnabled:![input isDisabled]];
+  if ([input color]) {
+    button.bezelColor = [input color];
+  }
+
+  objc_setAssociatedObject(button, &sIdentifierAssociationKey, aIdentifier,
+                           OBJC_ASSOCIATION_RETAIN);
+}
+
+- (void)updateMainButton:(NSCustomTouchBarItem*)aMainButton
+          withIdentifier:(NSTouchBarItemIdentifier)aIdentifier {
+  if (!aMainButton || !aIdentifier) {
+    return;
+  }
+
+  TouchBarInput* input = self.mappedLayoutItems[aIdentifier];
+  if (!input) {
+    return;
+  }
+
+  [self updateButton:aMainButton withIdentifier:aIdentifier];
+  NSButton* button = (NSButton*)[aMainButton view];
+
+  // If empty, string is still being localized. Display a blank input instead.
+  if ([[input title] isEqualToString:@""]) {
+    [button setImagePosition:NSNoImage];
+  } else {
+    [button setImagePosition:NSImageLeft];
+  }
+  button.imageHugsTitle = YES;
+  [button.widthAnchor constraintGreaterThanOrEqualToConstant:MAIN_BUTTON_WIDTH].active = YES;
+  [button setContentHuggingPriority:1.0 forOrientation:NSLayoutConstraintOrientationHorizontal];
+}
+
+- (void)updatePopover:(NSPopoverTouchBarItem*)aPopoverItem
+       withIdentifier:(NSTouchBarItemIdentifier)aIdentifier {
+  if (!aPopoverItem || !aIdentifier) {
+    return;
+  }
+
+  TouchBarInput* input = self.mappedLayoutItems[aIdentifier];
+  if (!input) {
+    return;
+  }
+
+  aPopoverItem.showsCloseButton = YES;
+  if ([input imageURI]) {
+    [self loadIconForInput:input forItem:aPopoverItem];
+  } else if ([input title]) {
+    aPopoverItem.collapsedRepresentationLabel = [input title];
+  }
+
+  // Special handling to show/hide the search popover if the Urlbar is focused.
+  if ([[input nativeIdentifier] isEqualToString:[TouchBarInput searchPopoverIdentifier]]) {
+    // We can reach this code during window shutdown. We only want to toggle
+    // showPopover if we are in a normal running state.
+    if (!mTouchBarHelper) {
+      return;
+    }
+    bool urlbarIsFocused = false;
+    mTouchBarHelper->GetIsUrlbarFocused(&urlbarIsFocused);
+    if (urlbarIsFocused) {
+      [aPopoverItem showPopover:self];
+    }
+  }
+}
+
+- (void)updateScrollView:(NSCustomTouchBarItem*)aScrollViewItem
+          withIdentifier:(NSTouchBarItemIdentifier)aIdentifier {
+  if (!aScrollViewItem || !aIdentifier) {
+    return;
+  }
+
+  TouchBarInput* input = self.mappedLayoutItems[aIdentifier];
+  if (!input || ![input children]) {
+    return;
+  }
+
+  NSMutableDictionary* constraintViews = [NSMutableDictionary dictionary];
+  NSView* documentView = [[NSView alloc] initWithFrame:NSZeroRect];
+  NSString* layoutFormat = @"H:|-8-";
+  NSSize size = NSMakeSize(kInputSpacing, 30);
+  // Layout strings allow only alphanumeric characters. We will use this
+  // NSCharacterSet to strip illegal characters.
+  NSCharacterSet* charactersToRemove = [[NSCharacterSet alphanumericCharacterSet] invertedSet];
+
+  for (TouchBarInput* childInput in [input children]) {
+    if ([childInput baseType] != TouchBarInputBaseType::kButton) {
+      continue;
+    }
+    [self replaceMappedLayoutItem:childInput];
+    NSCustomTouchBarItem* newItem =
+        [[NSCustomTouchBarItem alloc] initWithIdentifier:[childInput nativeIdentifier]];
+    NSButton* button = [NSButton buttonWithTitle:[childInput title]
+                                          target:self
+                                          action:@selector(touchBarAction:)];
+    newItem.view = button;
+    // ScrollView buttons are similar to mainButtons except for their width.
+    [self updateMainButton:newItem withIdentifier:[childInput nativeIdentifier]];
+    uint32_t buttonSize = MAX(button.attributedTitle.size.width + kInputIconSize + kInputSpacing,
+                              kScrollViewButtonWidth);
+    [[button widthAnchor] constraintGreaterThanOrEqualToConstant:buttonSize].active = YES;
+
+    NSCustomTouchBarItem* tempItem = self.scrollViewButtons[[childInput nativeIdentifier]];
+    self.scrollViewButtons[[childInput nativeIdentifier]] = newItem;
+    [tempItem release];
+
+    button.translatesAutoresizingMaskIntoConstraints = NO;
+    [documentView addSubview:button];
+    NSString* layoutKey = [[[childInput nativeIdentifier]
+        componentsSeparatedByCharactersInSet:charactersToRemove] componentsJoinedByString:@""];
+
+    // Iteratively create our layout string.
+    layoutFormat =
+        [layoutFormat stringByAppendingString:[NSString stringWithFormat:@"[%@]-8-", layoutKey]];
+    [constraintViews setObject:button forKey:layoutKey];
+    size.width += kInputSpacing + buttonSize;
+  }
+  layoutFormat = [layoutFormat stringByAppendingString:[NSString stringWithFormat:@"|"]];
+  NSArray* hConstraints =
+      [NSLayoutConstraint constraintsWithVisualFormat:layoutFormat
+                                              options:NSLayoutFormatAlignAllCenterY
+                                              metrics:nil
+                                                views:constraintViews];
+  NSScrollView* scrollView =
+      [[NSScrollView alloc] initWithFrame:CGRectMake(0, 0, size.width, size.height)];
+  [documentView setFrame:NSMakeRect(0, 0, size.width, size.height)];
+  [NSLayoutConstraint activateConstraints:hConstraints];
+  scrollView.documentView = documentView;
+
+  aScrollViewItem.view = scrollView;
+}
+
+- (void)updateLabel:(NSTextField*)aLabel withIdentifier:(NSTouchBarItemIdentifier)aIdentifier {
+  if (!aLabel || !aIdentifier) {
+    return;
+  }
+
+  TouchBarInput* input = self.mappedLayoutItems[aIdentifier];
+  if (!input || ![input title]) {
+    return;
+  }
+  [aLabel setStringValue:[input title]];
+}
+
+- (NSTouchBarItem*)makeShareScrubberForIdentifier:(NSTouchBarItemIdentifier)aIdentifier {
+  TouchBarInput* input = self.mappedLayoutItems[aIdentifier];
+  // System-default share menu
+  NSSharingServicePickerTouchBarItem* servicesItem =
+      [[NSSharingServicePickerTouchBarItem alloc] initWithIdentifier:aIdentifier];
+
+  // buttonImage needs to be set to nil while we wait for our icon to load.
+  // Otherwise, the default Apple share icon is automatically loaded.
+  servicesItem.buttonImage = nil;
+
+  [self loadIconForInput:input forItem:servicesItem];
+
+  servicesItem.delegate = self;
+  return servicesItem;
+}
+
+- (void)showPopover:(TouchBarInput*)aPopover showing:(bool)aShowing {
+  if (!aPopover) {
+    return;
+  }
+  NSPopoverTouchBarItem* popoverItem =
+      (NSPopoverTouchBarItem*)[self itemForIdentifier:[aPopover nativeIdentifier]];
+  if (!popoverItem) {
+    return;
+  }
+  if (aShowing) {
+    [popoverItem showPopover:self];
+  } else {
+    [popoverItem dismissPopover:self];
+  }
+}
+
+- (void)touchBarAction:(id)aSender {
+  NSTouchBarItemIdentifier identifier =
+      objc_getAssociatedObject(aSender, &sIdentifierAssociationKey);
+  if (!identifier || [identifier isEqualToString:@""]) {
+    return;
+  }
+
+  TouchBarInput* input = self.mappedLayoutItems[identifier];
+  if (!input) {
+    return;
+  }
+
+  nsCOMPtr<nsITouchBarInputCallback> callback = [input callback];
+  if (!callback) {
+    NSLog(@"Touch Bar action attempted with no valid callback! Identifier: %@",
+          [input nativeIdentifier]);
+    return;
+  }
+  callback->OnCommand();
+}
+
+- (void)loadIconForInput:(TouchBarInput*)aInput forItem:(NSTouchBarItem*)aItem {
+  if (!aInput || ![aInput imageURI] || !aItem || !mTouchBarHelper) {
+    return;
+  }
+
+  RefPtr<nsTouchBarInputIcon> icon = [aInput icon];
+
+  if (!icon) {
+    RefPtr<Document> document;
+    nsresult rv = mTouchBarHelper->GetDocument(getter_AddRefs(document));
+    if (NS_FAILED(rv) || !document) {
+      return;
+    }
+    icon = new nsTouchBarInputIcon(document, aInput, aItem);
+    [aInput setIcon:icon];
+  }
+  icon->SetupIcon([aInput imageURI]);
+}
+
+- (void)releaseJSObjects {
+  mTouchBarHelper = nil;
+
+  for (NSTouchBarItemIdentifier identifier in self.mappedLayoutItems) {
+    TouchBarInput* input = self.mappedLayoutItems[identifier];
+    if (!input) {
+      continue;
+    }
+
+    // Childless popovers contain the default Touch Bar as its popoverTouchBar.
+    // We check for [input children] since the default Touch Bar contains a
+    // popover (search-popover), so this would infinitely loop if there was no check.
+    if ([input baseType] == TouchBarInputBaseType::kPopover && [input children]) {
+      NSTouchBarItem* item = [self itemForIdentifier:identifier];
+      [(nsTouchBar*)[(NSPopoverTouchBarItem*)item popoverTouchBar] releaseJSObjects];
+    }
+
+    [input releaseJSObjects];
+  }
+}
+
+#pragma mark - NSSharingServicePickerTouchBarItemDelegate
+
+- (NSArray*)itemsForSharingServicePickerTouchBarItem:
+    (NSSharingServicePickerTouchBarItem*)aPickerTouchBarItem {
+  NSURL* urlToShare = nil;
+  NSString* titleToShare = @"";
+  nsAutoString url;
+  nsAutoString title;
+  if (mTouchBarHelper) {
+    nsresult rv = mTouchBarHelper->GetActiveUrl(url);
+    if (!NS_FAILED(rv)) {
+      urlToShare = [NSURL URLWithString:nsCocoaUtils::ToNSString(url)];
+      // NSURL URLWithString returns nil if the URL is invalid. At this point,
+      // it is too late to simply shut down the share menu, so we default to
+      // about:blank if the share button is clicked when the URL is invalid.
+      if (urlToShare == nil) {
+        urlToShare = [NSURL URLWithString:@"about:blank"];
+      }
+    }
+
+    rv = mTouchBarHelper->GetActiveTitle(title);
+    if (!NS_FAILED(rv)) {
+      titleToShare = nsCocoaUtils::ToNSString(title);
+    }
+  }
+
+  return @[ urlToShare, titleToShare ];
+}
+
+- (NSArray<NSSharingService*>*)sharingServicePicker:(NSSharingServicePicker*)aSharingServicePicker
+                            sharingServicesForItems:(NSArray*)aItems
+                            proposedSharingServices:(NSArray<NSSharingService*>*)aProposedServices {
+  // redundant services
+  NSArray* excludedServices = @[
+    @"com.apple.share.System.add-to-safari-reading-list",
+  ];
+
+  NSArray* sharingServices = [aProposedServices
+      filteredArrayUsingPredicate:[NSPredicate
+                                      predicateWithFormat:@"NOT (name IN %@)", excludedServices]];
+
+  return sharingServices;
+}
+
+@end