/* 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/. */

#ifndef nsTouchBar_h_
#define nsTouchBar_h_

#import <Cocoa/Cocoa.h>

#include "nsITouchBarHelper.h"
#include "nsTouchBarInput.h"

const NSTouchBarItemIdentifier kTouchBarBaseIdentifier =
    @"com.mozilla.firefox.touchbar";

/**
 * Our TouchBar is its own delegate. This is adequate for our purposes,
 * since the current implementation only defines Touch Bar buttons for the
 * main Firefox window. If modals and other windows were to have custom
 * Touch Bar views, each window would have to be a NSTouchBarDelegate so
 * they could define their own custom sets of buttons.
 */
@interface nsTouchBar : NSTouchBar <NSTouchBarDelegate,
                                    NSSharingServicePickerTouchBarItemDelegate,
                                    NSSharingServiceDelegate> {
  /**
   * Link to the frontend API that determines which buttons appear
   * in the Touch Bar
   */
  nsCOMPtr<nsITouchBarHelper> mTouchBarHelper;
}

/**
 * Contains TouchBarInput representations of the inputs currently in
 * the Touch Bar. Populated in `init` and updated by nsITouchBarUpdater.
 */
@property(strong) NSMutableDictionary<NSTouchBarItemIdentifier, TouchBarInput*>*
    mappedLayoutItems;

/**
 * Stores buttons displayed in a NSScrollView. They must be stored separately
 * because they are untethered from the nsTouchBar. As such, they
 * cannot be retrieved with [NSTouchBar itemForIdentifier].
 */
@property(strong)
    NSMutableDictionary<NSTouchBarItemIdentifier, NSCustomTouchBarItem*>*
        scrollViewButtons;

/**
 * Returns an instance of nsTouchBar based on implementation details
 * fetched from the frontend through nsTouchBarHelper.
 */
- (instancetype)init;

/**
 * If aInputs is not nil, a nsTouchBar containing the inputs specified is
 * initialized. Otherwise, a nsTouchBar is initialized containing a default set
 * of inputs.
 */
- (instancetype)initWithInputs:(NSMutableArray<TouchBarInput*>*)aInputs;

- (void)dealloc;

/**
 * Creates a new NSTouchBarItem and adds it to the Touch Bar.
 * Reads the passed identifier and creates the
 * appropriate item type (eg. NSCustomTouchBarItem).
 * Required as a member of NSTouchBarDelegate.
 */
- (NSTouchBarItem*)touchBar:(NSTouchBar*)aTouchBar
      makeItemForIdentifier:(NSTouchBarItemIdentifier)aIdentifier;

/**
 * Updates an input on the Touch Bar by redirecting to one of the specific
 * TouchBarItem types updaters.
 * Returns true if the input was successfully updated.
 */
- (bool)updateItem:(TouchBarInput*)aInput;

/**
 * Helper function for updateItem. Checks to see if a given input exists within
 * any of this Touch Bar's popovers and updates it if it exists.
 */
- (bool)maybeUpdatePopoverChild:(TouchBarInput*)aInput;

/**
 * Helper function for updateItem. Checks to see if a given input exists within
 * any of this Touch Bar's scroll views and updates it if it exists.
 */
- (bool)maybeUpdateScrollViewChild:(TouchBarInput*)aInput;

/**
 * Helper function for updateItem. Replaces an item in the
 * self.mappedLayoutItems dictionary.
 */
- (void)replaceMappedLayoutItem:(TouchBarInput*)aItem;

/**
 * Update or create various subclasses of TouchBarItem.
 */
- (void)updateButton:(NSCustomTouchBarItem*)aButton
      withIdentifier:(NSTouchBarItemIdentifier)aIdentifier;
- (void)updateMainButton:(NSCustomTouchBarItem*)aMainButton
          withIdentifier:(NSTouchBarItemIdentifier)aIdentifier;
- (void)updatePopover:(NSPopoverTouchBarItem*)aPopoverItem
       withIdentifier:(NSTouchBarItemIdentifier)aIdentifier;
- (void)updateScrollView:(NSCustomTouchBarItem*)aScrollViewItem
          withIdentifier:(NSTouchBarItemIdentifier)aIdentifier;
- (void)updateLabel:(NSTextField*)aLabel
     withIdentifier:(NSTouchBarItemIdentifier)aIdentifier;
- (NSTouchBarItem*)makeShareScrubberForIdentifier:
    (NSTouchBarItemIdentifier)aIdentifier;

/**
 * If aShowing is true, aPopover is shown. Otherwise, it is hidden.
 */
- (void)showPopover:(TouchBarInput*)aPopover showing:(bool)aShowing;

/**
 *  Redirects button actions to the appropriate handler.
 */
- (void)touchBarAction:(id)aSender;

/**
 * Helper function to initialize a new nsTouchBarInputIcon and load an icon.
 */
- (void)loadIconForInput:(TouchBarInput*)aInput forItem:(NSTouchBarItem*)aItem;

- (NSArray*)itemsForSharingServicePickerTouchBarItem:
    (NSSharingServicePickerTouchBarItem*)aPickerTouchBarItem;

- (NSArray<NSSharingService*>*)
       sharingServicePicker:(NSSharingServicePicker*)aSharingServicePicker
    sharingServicesForItems:(NSArray*)aItems
    proposedSharingServices:(NSArray<NSSharingService*>*)aProposedServices;

- (void)releaseJSObjects;

@end  // nsTouchBar

#endif  // nsTouchBar_h_