ios/chrome/share_extension/share_view_controller.mm - chromium/src.git - Git at Google

 // Copyright 2016 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 <MobileCoreServices/MobileCoreServices.h>

 #import "ios/chrome/share_extension/share_view_controller.h"

 #import "base/ios/block_types.h"
 #import "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/chrome/common/app_group/app_group_command.h"
 #import "ios/chrome/common/app_group/app_group_constants.h"
 #import "ios/chrome/common/crash_report/crash_helper.h"
 #import "ios/chrome/share_extension/share_extension_view.h"
 #import "ios/chrome/share_extension/ui_util.h"

 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif

 // Type for completion handler to fetch the components of the share items.
 // |idResponse| type depends on the element beeing fetched.
 using ItemBlock = void (^)(id idResponse, NSError* error);

 namespace {

 // Minimum size around the widget
 const CGFloat kShareExtensionMargin = 15;
 const CGFloat kShareExtensionMaxWidth = 390;
 // Clip the last separator out of the table view.
 const CGFloat kScreenShotWidth = 100;
 const CGFloat kScreenShotHeight = 100;
 const CGFloat kMediumAlpha = 0.5;

 }  // namespace

 @interface ShareViewController ()<ShareExtensionViewActionTarget> {
   // This constrains the center of the widget to be vertically in the center
   // of the the screen. It has to be modified for the appearance and dismissal
   // animation.
   NSLayoutConstraint* _widgetVerticalPlacementConstraint;

   NSURL* _shareURL;
   NSString* _shareTitle;
   UIImage* _image;
   NSExtensionItem* _shareItem;
 }

 @property(nonatomic, weak) UIView* maskView;
 @property(nonatomic, weak) ShareExtensionView* shareView;
 @property(nonatomic, assign) app_group::ShareExtensionItemType itemType;

 // Creates a files in |app_group::ShareExtensionItemsFolder()| containing a
 // serialized NSDictionary.
 // If |cancel| is true, |actionType| is ignored.
 - (void)queueActionItemURL:(NSURL*)URL
                      title:(NSString*)title
                     action:(app_group::ShareExtensionItemType)actionType
                     cancel:(BOOL)cancel
                 completion:(ProceduralBlock)completion;

 // Loads all the shared elements from the extension context and update the UI.
 - (void)loadElementsFromContext;

 // Sets constraints to the widget so that margin are at least
 // kShareExtensionMargin points and widget width is closest up to
 // kShareExtensionMaxWidth points.
 - (void)constrainWidgetWidth;

 // Displays the normal share view.
 - (void)displayShareView;

 // Displays an alert to report an error to the user.
 - (void)displayErrorView;

 @end

 @implementation ShareViewController

 @synthesize maskView = _maskView;
 @synthesize shareView = _shareView;
 @synthesize itemType = _itemType;

 + (void)initialize {
   if (self == [ShareViewController self]) {
     if (crash_helper::common::CanUseCrashpad()) {
       crash_helper::common::StartCrashpad();
     }
   }
 }

 #pragma mark - UIViewController

 - (void)viewDidLoad {
   [super viewDidLoad];

   // This view shadows the screen under the share extension.
   UIView* maskView = [[UIView alloc] initWithFrame:CGRectZero];
   self.maskView = maskView;
   // On iOS 13, the default share extension presentation style already has a
   // mask behind the view.
   self.maskView.hidden = YES;
   [self.maskView
       setBackgroundColor:[UIColor colorWithWhite:0 alpha:kMediumAlpha]];
   [self.view addSubview:self.maskView];
   ui_util::ConstrainAllSidesOfViewToView(self.view, self.maskView);

   // This view is the main view of the share extension.
   ShareExtensionView* shareView =
       [[ShareExtensionView alloc] initWithActionTarget:self];
   [self setShareView:shareView];
   [self.view addSubview:self.shareView];

   [self constrainWidgetWidth];

   // Position the widget below the screen. It will be slided up with an
   // animation.
   _widgetVerticalPlacementConstraint =
       [shareView.topAnchor constraintEqualToAnchor:self.view.bottomAnchor];
   [_widgetVerticalPlacementConstraint setActive:YES];
   [[shareView.centerXAnchor constraintEqualToAnchor:self.view.centerXAnchor]
       setActive:YES];

   [self.maskView setTranslatesAutoresizingMaskIntoConstraints:NO];
   [self.shareView setTranslatesAutoresizingMaskIntoConstraints:NO];

   [self loadElementsFromContext];
 }

 #pragma mark - Private methods

 - (void)displayShareView {
   [self.shareView setTitle:_shareTitle];
   [self.shareView setURL:_shareURL];
   if (_image) {
     [self.shareView setScreenshot:_image];
   }
   dispatch_async(dispatch_get_main_queue(), ^{
     // Center the widget.
     [self->_widgetVerticalPlacementConstraint setActive:NO];
     self->_widgetVerticalPlacementConstraint = [self->_shareView.centerYAnchor
         constraintEqualToAnchor:self.view.centerYAnchor];
     [self->_widgetVerticalPlacementConstraint setActive:YES];
     [self.maskView setAlpha:0];
     [UIView animateWithDuration:ui_util::kAnimationDuration
                      animations:^{
                        [self.maskView setAlpha:1];
                        [self.view layoutIfNeeded];
                      }];
   });
 }

 - (void)displayErrorView {
   __weak ShareViewController* weakSelf = self;
   dispatch_async(dispatch_get_main_queue(), ^{
     [weakSelf displayErrorViewMainThread];
   });
 }

 - (void)displayErrorViewMainThread {
   NSString* errorMessage =
       NSLocalizedString(@"IDS_IOS_ERROR_MESSAGE_SHARE_EXTENSION",
                         @"The error message to display to the user.");
   NSString* okButton =
       NSLocalizedString(@"IDS_IOS_OK_BUTTON_SHARE_EXTENSION",
                         @"The label of the OK button in share extension.");
   NSString* applicationName = [[[NSBundle mainBundle] infoDictionary]
       valueForKey:@"CFBundleDisplayName"];
   errorMessage =
       [errorMessage stringByReplacingOccurrencesOfString:@"APPLICATION_NAME"
                                               withString:applicationName];
   UIAlertController* alert =
       [UIAlertController alertControllerWithTitle:errorMessage
                                           message:[_shareURL absoluteString]
                                    preferredStyle:UIAlertControllerStyleAlert];
   UIAlertAction* defaultAction = [UIAlertAction
       actionWithTitle:okButton
                 style:UIAlertActionStyleDefault
               handler:^(UIAlertAction* action) {
                 NSError* unsupportedURLError =
                     [NSError errorWithDomain:NSURLErrorDomain
                                         code:NSURLErrorUnsupportedURL
                                     userInfo:nil];
                 [self dismissAndReturnItem:nil error:unsupportedURLError];
               }];
   [alert addAction:defaultAction];
   [self presentViewController:alert animated:YES completion:nil];
 }

 - (void)constrainWidgetWidth {
   // Setting the constraints.
   NSDictionary* views = @{ @"share" : self.shareView };

   NSDictionary* metrics = @{
     @"margin" : @(kShareExtensionMargin),
     @"maxWidth" : @(kShareExtensionMaxWidth),
   };

   NSArray* constraints = @[
     // Sets the margin around the share extension.
     @"H:|-(>=margin)-[share(<=maxWidth)]-(>=margin)-|",
     // If the screen is too small, reduce width of widget.
     @"H:[share(==maxWidth@900)]",
   ];

   for (NSString* constraint : constraints) {
     [NSLayoutConstraint
         activateConstraints:[NSLayoutConstraint
                                 constraintsWithVisualFormat:constraint
                                                     options:0
                                                     metrics:metrics
                                                       views:views]];
   }

   // |self.shareView| must be as large as possible and in the center of the
   // screen.
   [self.shareView
       setContentCompressionResistancePriority:UILayoutPriorityDefaultHigh
                                       forAxis:UILayoutConstraintAxisHorizontal];
 }

 - (void)loadElementsFromContext {
   NSString* typeURL = (__bridge NSString*)(kUTTypeURL);
   for (NSExtensionItem* item in self.extensionContext.inputItems) {
     for (NSItemProvider* itemProvider in item.attachments) {
       if ([itemProvider hasItemConformingToTypeIdentifier:typeURL]) {
         ItemBlock URLCompletion = ^(id idURL, NSError* error) {
           NSURL* URL = base::mac::ObjCCast<NSURL>(idURL);
           if (!URL) {
             [self displayErrorView];
             return;
           }
           dispatch_async(dispatch_get_main_queue(), ^{
             self->_shareItem = [item copy];
             self->_shareURL = [URL copy];
             self->_shareTitle = [[[item attributedContentText] string] copy];
             if ([self->_shareTitle length] == 0) {
               self->_shareTitle = [URL host];
             }
             if ([[self->_shareURL scheme] isEqualToString:@"http"] ||
                 [[self->_shareURL scheme] isEqualToString:@"https"]) {
               [self displayShareView];
             } else {
               [self displayErrorView];
             }
           });
         };
         [itemProvider loadItemForTypeIdentifier:typeURL
                                         options:nil
                               completionHandler:URLCompletion];
         NSDictionary* imageOptions = @{
           NSItemProviderPreferredImageSizeKey : [NSValue
               valueWithCGSize:CGSizeMake(kScreenShotWidth, kScreenShotHeight)]
         };
         ItemBlock imageCompletion = ^(id imageData, NSError* error) {
           self->_image = base::mac::ObjCCast<UIImage>(imageData);
           if (self->_image && self.shareView) {
             dispatch_async(dispatch_get_main_queue(), ^{
               [self.shareView setScreenshot:self->_image];
             });
           }
         };
         [itemProvider loadPreviewImageWithOptions:imageOptions
                                 completionHandler:imageCompletion];
       }
     }
   }
 }

 - (void)dismissAndReturnItem:(NSExtensionItem*)item error:(NSError*)error {
   // Set the Y placement constraints so the whole extension slides out of the
   // screen.
   // The direction (up or down) is relative to the output (cancel or submit).
   [_widgetVerticalPlacementConstraint setActive:NO];
   if (item) {
     _widgetVerticalPlacementConstraint =
         [_shareView.bottomAnchor constraintEqualToAnchor:self.view.topAnchor];
   } else {
     _widgetVerticalPlacementConstraint =
         [_shareView.topAnchor constraintEqualToAnchor:self.view.bottomAnchor];
   }
   [_widgetVerticalPlacementConstraint setActive:YES];
   [UIView animateWithDuration:ui_util::kAnimationDuration
       animations:^{
         [self.maskView setAlpha:0];
         [self.view layoutIfNeeded];
       }
       completion:^(BOOL finished) {
         NSArray* returnItem = item ? @[ item ] : @[];
         if (error) {
           [self.extensionContext cancelRequestWithError:error];
         } else {
           [self.extensionContext completeRequestReturningItems:returnItem
                                              completionHandler:nil];
         }
       }];
 }

 - (void)queueActionItemURL:(NSURL*)URL
                      title:(NSString*)title
                     action:(app_group::ShareExtensionItemType)actionType
                     cancel:(BOOL)cancel
                 completion:(ProceduralBlock)completion {
   NSURL* readingListURL = app_group::ExternalCommandsItemsFolder();
   if (![[NSFileManager defaultManager]
           fileExistsAtPath:[readingListURL path]]) {
     [[NSFileManager defaultManager] createDirectoryAtPath:[readingListURL path]
                               withIntermediateDirectories:YES
                                                attributes:nil
                                                     error:nil];
   }
   NSDate* date = [NSDate date];
   NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
   // This format sorts files by alphabetical order.
   [dateFormatter setDateFormat:@"yyyy-MM-dd-HH-mm-ss.SSSSSS"];
   NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"UTC"];
   [dateFormatter setTimeZone:timeZone];
   NSString* dateString = [dateFormatter stringFromDate:date];
   NSURL* fileURL =
       [readingListURL URLByAppendingPathComponent:dateString isDirectory:NO];

   NSMutableDictionary* dict = [[NSMutableDictionary alloc] init];
   if (URL)
     [dict setObject:URL forKey:app_group::kShareItemURL];
   if (title)
     [dict setObject:title forKey:app_group::kShareItemTitle];
   [dict setObject:date forKey:app_group::kShareItemDate];
   [dict setObject:app_group::kShareItemSourceShareExtension
            forKey:app_group::kShareItemSource];

   if (!cancel) {
     NSNumber* entryType = [NSNumber numberWithInteger:actionType];
     [dict setObject:entryType forKey:app_group::kShareItemType];
   }

   [dict setValue:[NSNumber numberWithBool:cancel]
           forKey:app_group::kShareItemCancel];
   NSError* error = nil;
   NSData* data = [NSKeyedArchiver archivedDataWithRootObject:dict
                                        requiringSecureCoding:NO
                                                        error:&error];

   if (!data || error) {
     DLOG(WARNING) << "Error serializing data for title: "
                   << base::SysNSStringToUTF8(title)
                   << base::SysNSStringToUTF8([error description]);
     return;
   }

   [[NSFileManager defaultManager] createFileAtPath:[fileURL path]
                                           contents:data
                                         attributes:nil];
   if (completion) {
     completion();
   }
 }

 #pragma mark - ShareExtensionViewActionTarget

 - (void)shareExtensionViewDidSelectCancel:(id)sender {
   [self
       queueActionItemURL:nil
                    title:nil
                   action:app_group::READING_LIST_ITEM  // Ignored
                   cancel:YES
               completion:^{
                 [self
                     dismissAndReturnItem:nil
                                    error:
                                        [NSError
                                            errorWithDomain:NSCocoaErrorDomain
                                                       code:NSUserCancelledError
                                                   userInfo:nil]];
               }];
 }

 - (void)shareExtensionViewDidSelectAddToReadingList:(id)sender {
   [self queueActionItemURL:_shareURL
                      title:_shareTitle
                     action:app_group::READING_LIST_ITEM
                     cancel:NO
                 completion:^{
                   [self dismissAndReturnItem:self->_shareItem error:nil];
                 }];
 }

 - (void)shareExtensionViewDidSelectAddToBookmarks:(id)sender {
   [self queueActionItemURL:_shareURL
                      title:_shareTitle
                     action:app_group::BOOKMARK_ITEM
                     cancel:NO
                 completion:^{
                   [self dismissAndReturnItem:self->_shareItem error:nil];
                 }];
 }

 - (void)shareExtensionViewDidSelectOpenInChrome:(id)sender {
   UIResponder* responder = self;
   while ((responder = responder.nextResponder)) {
     if ([responder respondsToSelector:@selector(openURL:)]) {
       AppGroupCommand* command = [[AppGroupCommand alloc]
           initWithSourceApp:app_group::kOpenCommandSourceShareExtension
              URLOpenerBlock:^(NSURL* openURL) {
                [responder performSelector:@selector(openURL:)
                                withObject:openURL];
              }];
       [command prepareToOpenURL:_shareURL];
       [command executeInApp];
       break;
     }
   }
   [self queueActionItemURL:_shareURL
                      title:_shareTitle
                     action:app_group::OPEN_IN_CHROME_ITEM
                     cancel:NO
                 completion:^{
                   [self dismissAndReturnItem:self->_shareItem error:nil];
                 }];
 }

 - (void)shareExtensionView:(id)sender
                typeChanged:(app_group::ShareExtensionItemType)type {
   [self setItemType:type];
 }

 @end
	// Copyright 2016 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 <MobileCoreServices/MobileCoreServices.h>

	#import "ios/chrome/share_extension/share_view_controller.h"

	#import "base/ios/block_types.h"
	#import "base/mac/foundation_util.h"
	#include "base/strings/sys_string_conversions.h"
	#import "ios/chrome/common/app_group/app_group_command.h"
	#import "ios/chrome/common/app_group/app_group_constants.h"
	#import "ios/chrome/common/crash_report/crash_helper.h"
	#import "ios/chrome/share_extension/share_extension_view.h"
	#import "ios/chrome/share_extension/ui_util.h"

	#if !defined(__has_feature) \|\| !__has_feature(objc_arc)
	#error "This file requires ARC support."
	#endif

	// Type for completion handler to fetch the components of the share items.
	// \|idResponse\| type depends on the element beeing fetched.
	using ItemBlock = void (^)(id idResponse, NSError* error);

	namespace {

	// Minimum size around the widget
	const CGFloat kShareExtensionMargin = 15;
	const CGFloat kShareExtensionMaxWidth = 390;
	// Clip the last separator out of the table view.
	const CGFloat kScreenShotWidth = 100;
	const CGFloat kScreenShotHeight = 100;
	const CGFloat kMediumAlpha = 0.5;

	} // namespace

	@interface ShareViewController ()<ShareExtensionViewActionTarget> {
	// This constrains the center of the widget to be vertically in the center
	// of the the screen. It has to be modified for the appearance and dismissal
	// animation.
	NSLayoutConstraint* _widgetVerticalPlacementConstraint;

	NSURL* _shareURL;
	NSString* _shareTitle;
	UIImage* _image;
	NSExtensionItem* _shareItem;
	}

	@property(nonatomic, weak) UIView* maskView;
	@property(nonatomic, weak) ShareExtensionView* shareView;
	@property(nonatomic, assign) app_group::ShareExtensionItemType itemType;

	// Creates a files in \|app_group::ShareExtensionItemsFolder()\| containing a
	// serialized NSDictionary.
	// If \|cancel\| is true, \|actionType\| is ignored.
	- (void)queueActionItemURL:(NSURL*)URL
	title:(NSString*)title
	action:(app_group::ShareExtensionItemType)actionType
	cancel:(BOOL)cancel
	completion:(ProceduralBlock)completion;

	// Loads all the shared elements from the extension context and update the UI.
	- (void)loadElementsFromContext;

	// Sets constraints to the widget so that margin are at least
	// kShareExtensionMargin points and widget width is closest up to
	// kShareExtensionMaxWidth points.
	- (void)constrainWidgetWidth;

	// Displays the normal share view.
	- (void)displayShareView;

	// Displays an alert to report an error to the user.
	- (void)displayErrorView;

	@end

	@implementation ShareViewController

	@synthesize maskView = _maskView;
	@synthesize shareView = _shareView;
	@synthesize itemType = _itemType;

	+ (void)initialize {
	if (self == [ShareViewController self]) {
	if (crash_helper::common::CanUseCrashpad()) {
	crash_helper::common::StartCrashpad();
	}
	}
	}

	#pragma mark - UIViewController

	- (void)viewDidLoad {
	[super viewDidLoad];

	// This view shadows the screen under the share extension.
	UIView* maskView = [[UIView alloc] initWithFrame:CGRectZero];
	self.maskView = maskView;
	// On iOS 13, the default share extension presentation style already has a
	// mask behind the view.
	self.maskView.hidden = YES;
	[self.maskView
	setBackgroundColor:[UIColor colorWithWhite:0 alpha:kMediumAlpha]];
	[self.view addSubview:self.maskView];
	ui_util::ConstrainAllSidesOfViewToView(self.view, self.maskView);

	// This view is the main view of the share extension.
	ShareExtensionView* shareView =
	[[ShareExtensionView alloc] initWithActionTarget:self];
	[self setShareView:shareView];
	[self.view addSubview:self.shareView];

	[self constrainWidgetWidth];

	// Position the widget below the screen. It will be slided up with an
	// animation.
	_widgetVerticalPlacementConstraint =
	[shareView.topAnchor constraintEqualToAnchor:self.view.bottomAnchor];
	[_widgetVerticalPlacementConstraint setActive:YES];
	[[shareView.centerXAnchor constraintEqualToAnchor:self.view.centerXAnchor]
	setActive:YES];

	[self.maskView setTranslatesAutoresizingMaskIntoConstraints:NO];
	[self.shareView setTranslatesAutoresizingMaskIntoConstraints:NO];

	[self loadElementsFromContext];
	}

	#pragma mark - Private methods

	- (void)displayShareView {
	[self.shareView setTitle:_shareTitle];
	[self.shareView setURL:_shareURL];
	if (_image) {
	[self.shareView setScreenshot:_image];
	}
	dispatch_async(dispatch_get_main_queue(), ^{
	// Center the widget.
	[self->_widgetVerticalPlacementConstraint setActive:NO];
	self->_widgetVerticalPlacementConstraint = [self->_shareView.centerYAnchor
	constraintEqualToAnchor:self.view.centerYAnchor];
	[self->_widgetVerticalPlacementConstraint setActive:YES];
	[self.maskView setAlpha:0];
	[UIView animateWithDuration:ui_util::kAnimationDuration
	animations:^{
	[self.maskView setAlpha:1];
	[self.view layoutIfNeeded];
	}];
	});
	}

	- (void)displayErrorView {
	__weak ShareViewController* weakSelf = self;
	dispatch_async(dispatch_get_main_queue(), ^{
	[weakSelf displayErrorViewMainThread];
	});
	}

	- (void)displayErrorViewMainThread {
	NSString* errorMessage =
	NSLocalizedString(@"IDS_IOS_ERROR_MESSAGE_SHARE_EXTENSION",
	@"The error message to display to the user.");
	NSString* okButton =
	NSLocalizedString(@"IDS_IOS_OK_BUTTON_SHARE_EXTENSION",
	@"The label of the OK button in share extension.");
	NSString* applicationName = [[[NSBundle mainBundle] infoDictionary]
	valueForKey:@"CFBundleDisplayName"];
	errorMessage =
	[errorMessage stringByReplacingOccurrencesOfString:@"APPLICATION_NAME"
	withString:applicationName];
	UIAlertController* alert =
	[UIAlertController alertControllerWithTitle:errorMessage
	message:[_shareURL absoluteString]
	preferredStyle:UIAlertControllerStyleAlert];
	UIAlertAction* defaultAction = [UIAlertAction
	actionWithTitle:okButton
	style:UIAlertActionStyleDefault
	handler:^(UIAlertAction* action) {
	NSError* unsupportedURLError =
	[NSError errorWithDomain:NSURLErrorDomain
	code:NSURLErrorUnsupportedURL
	userInfo:nil];
	[self dismissAndReturnItem:nil error:unsupportedURLError];
	}];
	[alert addAction:defaultAction];
	[self presentViewController:alert animated:YES completion:nil];
	}

	- (void)constrainWidgetWidth {
	// Setting the constraints.
	NSDictionary* views = @{ @"share" : self.shareView };

	NSDictionary* metrics = @{
	@"margin" : @(kShareExtensionMargin),
	@"maxWidth" : @(kShareExtensionMaxWidth),
	};

	NSArray* constraints = @[
	// Sets the margin around the share extension.
	@"H:\|-(>=margin)-[share(<=maxWidth)]-(>=margin)-\|",
	// If the screen is too small, reduce width of widget.
	@"H:[share(==maxWidth@900)]",
	];

	for (NSString* constraint : constraints) {
	[NSLayoutConstraint
	activateConstraints:[NSLayoutConstraint
	constraintsWithVisualFormat:constraint
	options:0
	metrics:metrics
	views:views]];
	}

	// \|self.shareView\| must be as large as possible and in the center of the
	// screen.
	[self.shareView
	setContentCompressionResistancePriority:UILayoutPriorityDefaultHigh
	forAxis:UILayoutConstraintAxisHorizontal];
	}

	- (void)loadElementsFromContext {
	NSString* typeURL = (__bridge NSString*)(kUTTypeURL);
	for (NSExtensionItem* item in self.extensionContext.inputItems) {
	for (NSItemProvider* itemProvider in item.attachments) {
	if ([itemProvider hasItemConformingToTypeIdentifier:typeURL]) {
	ItemBlock URLCompletion = ^(id idURL, NSError* error) {
	NSURL* URL = base::mac::ObjCCast<NSURL>(idURL);
	if (!URL) {
	[self displayErrorView];
	return;
	}
	dispatch_async(dispatch_get_main_queue(), ^{
	self->_shareItem = [item copy];
	self->_shareURL = [URL copy];
	self->_shareTitle = [[[item attributedContentText] string] copy];
	if ([self->_shareTitle length] == 0) {
	self->_shareTitle = [URL host];
	}
	if ([[self->_shareURL scheme] isEqualToString:@"http"] \|\|
	[[self->_shareURL scheme] isEqualToString:@"https"]) {
	[self displayShareView];
	} else {
	[self displayErrorView];
	}
	});
	};
	[itemProvider loadItemForTypeIdentifier:typeURL
	options:nil
	completionHandler:URLCompletion];
	NSDictionary* imageOptions = @{
	NSItemProviderPreferredImageSizeKey : [NSValue
	valueWithCGSize:CGSizeMake(kScreenShotWidth, kScreenShotHeight)]
	};
	ItemBlock imageCompletion = ^(id imageData, NSError* error) {
	self->_image = base::mac::ObjCCast<UIImage>(imageData);
	if (self->_image && self.shareView) {
	dispatch_async(dispatch_get_main_queue(), ^{
	[self.shareView setScreenshot:self->_image];
	});
	}
	};
	[itemProvider loadPreviewImageWithOptions:imageOptions
	completionHandler:imageCompletion];
	}
	}
	}
	}

	- (void)dismissAndReturnItem:(NSExtensionItem)item error:(NSError)error {
	// Set the Y placement constraints so the whole extension slides out of the
	// screen.
	// The direction (up or down) is relative to the output (cancel or submit).
	[_widgetVerticalPlacementConstraint setActive:NO];
	if (item) {
	_widgetVerticalPlacementConstraint =
	[_shareView.bottomAnchor constraintEqualToAnchor:self.view.topAnchor];
	} else {
	_widgetVerticalPlacementConstraint =
	[_shareView.topAnchor constraintEqualToAnchor:self.view.bottomAnchor];
	}
	[_widgetVerticalPlacementConstraint setActive:YES];
	[UIView animateWithDuration:ui_util::kAnimationDuration
	animations:^{
	[self.maskView setAlpha:0];
	[self.view layoutIfNeeded];
	}
	completion:^(BOOL finished) {
	NSArray* returnItem = item ? @[ item ] : @[];
	if (error) {
	[self.extensionContext cancelRequestWithError:error];
	} else {
	[self.extensionContext completeRequestReturningItems:returnItem
	completionHandler:nil];
	}
	}];
	}

	- (void)queueActionItemURL:(NSURL*)URL
	title:(NSString*)title
	action:(app_group::ShareExtensionItemType)actionType
	cancel:(BOOL)cancel
	completion:(ProceduralBlock)completion {
	NSURL* readingListURL = app_group::ExternalCommandsItemsFolder();
	if (![[NSFileManager defaultManager]
	fileExistsAtPath:[readingListURL path]]) {
	[[NSFileManager defaultManager] createDirectoryAtPath:[readingListURL path]
	withIntermediateDirectories:YES
	attributes:nil
	error:nil];
	}
	NSDate* date = [NSDate date];
	NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
	// This format sorts files by alphabetical order.
	[dateFormatter setDateFormat:@"yyyy-MM-dd-HH-mm-ss.SSSSSS"];
	NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"UTC"];
	[dateFormatter setTimeZone:timeZone];
	NSString* dateString = [dateFormatter stringFromDate:date];
	NSURL* fileURL =
	[readingListURL URLByAppendingPathComponent:dateString isDirectory:NO];

	NSMutableDictionary* dict = [[NSMutableDictionary alloc] init];
	if (URL)
	[dict setObject:URL forKey:app_group::kShareItemURL];
	if (title)
	[dict setObject:title forKey:app_group::kShareItemTitle];
	[dict setObject:date forKey:app_group::kShareItemDate];
	[dict setObject:app_group::kShareItemSourceShareExtension
	forKey:app_group::kShareItemSource];

	if (!cancel) {
	NSNumber* entryType = [NSNumber numberWithInteger:actionType];
	[dict setObject:entryType forKey:app_group::kShareItemType];
	}

	[dict setValue:[NSNumber numberWithBool:cancel]
	forKey:app_group::kShareItemCancel];
	NSError* error = nil;
	NSData* data = [NSKeyedArchiver archivedDataWithRootObject:dict
	requiringSecureCoding:NO
	error:&error];

	if (!data \|\| error) {
	DLOG(WARNING) << "Error serializing data for title: "
	<< base::SysNSStringToUTF8(title)
	<< base::SysNSStringToUTF8([error description]);
	return;
	}

	[[NSFileManager defaultManager] createFileAtPath:[fileURL path]
	contents:data
	attributes:nil];
	if (completion) {
	completion();
	}
	}

	#pragma mark - ShareExtensionViewActionTarget

	- (void)shareExtensionViewDidSelectCancel:(id)sender {
	[self
	queueActionItemURL:nil
	title:nil
	action:app_group::READING_LIST_ITEM // Ignored
	cancel:YES
	completion:^{
	[self
	dismissAndReturnItem:nil
	error:
	[NSError
	errorWithDomain:NSCocoaErrorDomain
	code:NSUserCancelledError
	userInfo:nil]];
	}];
	}

	- (void)shareExtensionViewDidSelectAddToReadingList:(id)sender {
	[self queueActionItemURL:_shareURL
	title:_shareTitle
	action:app_group::READING_LIST_ITEM
	cancel:NO
	completion:^{
	[self dismissAndReturnItem:self->_shareItem error:nil];
	}];
	}

	- (void)shareExtensionViewDidSelectAddToBookmarks:(id)sender {
	[self queueActionItemURL:_shareURL
	title:_shareTitle
	action:app_group::BOOKMARK_ITEM
	cancel:NO
	completion:^{
	[self dismissAndReturnItem:self->_shareItem error:nil];
	}];
	}

	- (void)shareExtensionViewDidSelectOpenInChrome:(id)sender {
	UIResponder* responder = self;
	while ((responder = responder.nextResponder)) {
	if ([responder respondsToSelector:@selector(openURL:)]) {
	AppGroupCommand* command = [[AppGroupCommand alloc]
	initWithSourceApp:app_group::kOpenCommandSourceShareExtension
	URLOpenerBlock:^(NSURL* openURL) {
	[responder performSelector:@selector(openURL:)
	withObject:openURL];
	}];
	[command prepareToOpenURL:_shareURL];
	[command executeInApp];
	break;
	}
	}
	[self queueActionItemURL:_shareURL
	title:_shareTitle
	action:app_group::OPEN_IN_CHROME_ITEM
	cancel:NO
	completion:^{
	[self dismissAndReturnItem:self->_shareItem error:nil];
	}];
	}

	- (void)shareExtensionView:(id)sender
	typeChanged:(app_group::ShareExtensionItemType)type {
	[self setItemType:type];
	}

	@end