Add support in widget to open search modes + copied link in app.

ios/chrome/widget_extension/widget_view_controller.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 "ios/chrome/widget_extension/widget_view_controller.h"
 
 #import <NotificationCenter/NotificationCenter.h>
 
+#include "base/ios/ios_util.h"
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
+#include "components/open_from_clipboard/clipboard_recent_content_impl_ios.h"
 #include "ios/chrome/common/app_group/app_group_constants.h"
-#include "ios/chrome/common/x_callback_url.h"
 #import "ios/chrome/widget_extension/widget_view.h"
-#import "net/base/mac/url_conversions.h"
-#include "url/gurl.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
+namespace {
+// Using GURL in the extension is not wanted as it includes ICU which makes the
+// extension binary much larger; therefore, ios/chrome/common/x_callback_url.h
+// cannot be used. This class makes a very basic use of x-callback-url, so no
+// full implementation is required.
+NSString* const kXCallbackURLHost = @"x-callback-url";
+}  // namespace
+
 @interface WidgetViewController ()<WidgetViewActionTarget>
 @property(nonatomic, weak) WidgetView* widgetView;
+@property(nonatomic, strong) NSURL* copiedURL;
+@property(nonatomic, strong)
+    ClipboardRecentContentImplIOS* clipboardRecentContent;
+
+// Updates the widget with latest data from the clipboard. Returns whether any
+// visual updates occured.
+- (BOOL)updateWidget;
+// Opens the main application with the given |command|.
+- (void)openAppWithCommand:(NSString*)command;
+// Opens the main application with the given |command| and |parameter|.
+- (void)openAppWithCommand:(NSString*)command parameter:(NSString*)parameter;
+// Returns the dictionary of commands to pass via user defaults to open the main
+// application for a given |command| and |parameter|.
++ (NSDictionary*)dictForCommand:(NSString*)command
+                      parameter:(NSString*)parameter;
+
 @end
 
 @implementation WidgetViewController
 
 @synthesize widgetView = _widgetView;
+@synthesize copiedURL = _copiedURL;
+@synthesize clipboardRecentContent = _clipboardRecentContent;
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _clipboardRecentContent = [[ClipboardRecentContentImplIOS alloc]
+        initWithAuthorizedSchemes:[NSSet setWithObjects:@"http", @"https", nil]
+                     userDefaults:app_group::GetGroupUserDefaults()
+                         delegate:nil];
+  }
+  return self;
+}
 
 #pragma mark - UIViewController
 
 - (void)viewDidLoad {
   [super viewDidLoad];
 
   // A local variable is necessary here as the property is declared weak and the
   // object would be deallocated before being retained by the addSubview call.
   WidgetView* widgetView = [[WidgetView alloc] initWithActionTarget:self];
   self.widgetView = widgetView;
   [self.view addSubview:self.widgetView];
 
-  [self.widgetView setTranslatesAutoresizingMaskIntoConstraints:NO];
+  if (base::ios::IsRunningOnIOS10OrLater()) {
+    self.extensionContext.widgetLargestAvailableDisplayMode =
+        NCWidgetDisplayModeExpanded;
+  }
+
+  self.widgetView.translatesAutoresizingMaskIntoConstraints = NO;
+
+  NSLayoutConstraint* heightAnchor = [self.widgetView.heightAnchor
+      constraintEqualToAnchor:self.view.heightAnchor];
+  heightAnchor.priority = 900;
+
   [NSLayoutConstraint activateConstraints:@[
     [self.widgetView.leadingAnchor
-        constraintEqualToAnchor:[self.view leadingAnchor]],
+        constraintEqualToAnchor:self.view.leadingAnchor],
+    [self.widgetView.widthAnchor constraintEqualToAnchor:self.view.widthAnchor],
     [self.widgetView.trailingAnchor
-        constraintEqualToAnchor:[self.view trailingAnchor]],
-    [self.widgetView.heightAnchor
-        constraintEqualToAnchor:[self.view heightAnchor]],
-    [self.widgetView.widthAnchor
-        constraintEqualToAnchor:[self.view widthAnchor]]
+        constraintEqualToAnchor:self.view.trailingAnchor],
+    heightAnchor,
+    [self.widgetView.topAnchor constraintEqualToAnchor:self.view.topAnchor],
   ]];
 }
 
-- (void)openApp:(id)sender {
+- (void)viewWillAppear:(BOOL)animated {
+  [super viewWillAppear:animated];
+  [self updateWidget];
+}
+
+- (void)widgetPerformUpdateWithCompletionHandler:
+    (void (^)(NCUpdateResult))completionHandler {
+  completionHandler([self updateWidget] ? NCUpdateResultNewData
+                                        : NCUpdateResultNoData);
+}
+
+- (BOOL)updateWidget {
+  NSURL* url = [_clipboardRecentContent recentURLFromClipboard];
+
+  if (![url isEqual:self.copiedURL]) {
+    self.copiedURL = url;
+    [self.widgetView updateCopiedURL:self.copiedURL.absoluteString];
+    return YES;
+  }
+  return NO;
+}
+
+#pragma mark - NCWidgetProviding
+
+- (void)widgetActiveDisplayModeDidChange:(NCWidgetDisplayMode)activeDisplayMode
+                         withMaximumSize:(CGSize)maxSize {
+  CGSize fittingSize = [self.widgetView
+      systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
+  if (fittingSize.height > maxSize.height) {
+    self.preferredContentSize = maxSize;
+  } else {
+    self.preferredContentSize = fittingSize;
+  }
+}
+
+#pragma mark - WidgetViewActionTarget
+
+- (void)openSearch:(id)sender {
+  [self openAppWithCommand:base::SysUTF8ToNSString(
+                               app_group::kChromeAppGroupFocusOmniboxCommand)];
+}
+
+- (void)openIncognito:(id)sender {
+  [self
+      openAppWithCommand:base::SysUTF8ToNSString(
+                             app_group::kChromeAppGroupIncognitoSearchCommand)];
+}
+
+- (void)openVoice:(id)sender {
+  [self openAppWithCommand:base::SysUTF8ToNSString(
+                               app_group::kChromeAppGroupVoiceSearchCommand)];
+}
+
+- (void)openQRCode:(id)sender {
+  [self openAppWithCommand:base::SysUTF8ToNSString(
+                               app_group::kChromeAppGroupQRScannerCommand)];
+}
+
+- (void)openCopiedURL:(id)sender {
+  DCHECK(self.copiedURL);
+  [self openAppWithCommand:base::SysUTF8ToNSString(
+                               app_group::kChromeAppGroupOpenURLCommand)
+                 parameter:self.copiedURL.absoluteString];
+}
+
+#pragma mark - internal
+
+- (void)openAppWithCommand:(NSString*)command {
+  return [self openAppWithCommand:command parameter:nil];
+}
+
+- (void)openAppWithCommand:(NSString*)command parameter:(NSString*)parameter {
   NSUserDefaults* sharedDefaults =
       [[NSUserDefaults alloc] initWithSuiteName:app_group::ApplicationGroup()];
   NSString* defaultsKey =
       base::SysUTF8ToNSString(app_group::kChromeAppGroupCommandPreference);
-  [sharedDefaults setObject:[WidgetViewController commandDict]
+  [sharedDefaults setObject:[WidgetViewController dictForCommand:command
+                                                       parameter:parameter]
                      forKey:defaultsKey];
   [sharedDefaults synchronize];
 
   NSString* scheme = base::mac::ObjCCast<NSString>([[NSBundle mainBundle]
       objectForInfoDictionaryKey:@"KSChannelChromeScheme"]);
   if (!scheme)
     return;
-  const GURL openURL =
-      CreateXCallbackURL(base::SysNSStringToUTF8(scheme),
-                         app_group::kChromeAppGroupXCallbackCommand);
-  [self.extensionContext openURL:net::NSURLWithGURL(openURL)
-               completionHandler:nil];
+
+  NSURLComponents* urlComponents = [NSURLComponents new];
+  urlComponents.scheme = scheme;
+  urlComponents.host = kXCallbackURLHost;
+  urlComponents.path = [NSString
+      stringWithFormat:@"/%@", base::SysUTF8ToNSString(
+                                   app_group::kChromeAppGroupXCallbackCommand)];
+
+  NSURL* openURL = [urlComponents URL];
+  [self.extensionContext openURL:openURL completionHandler:nil];
 }
 
-+ (NSDictionary*)commandDict {
-  NSString* command =
-      base::SysUTF8ToNSString(app_group::kChromeAppGroupFocusOmniboxCommand);
++ (NSDictionary*)dictForCommand:(NSString*)command
+                      parameter:(NSString*)parameter {
   NSString* timePrefKey =
       base::SysUTF8ToNSString(app_group::kChromeAppGroupCommandTimePreference);
   NSString* appPrefKey =
       base::SysUTF8ToNSString(app_group::kChromeAppGroupCommandAppPreference);
   NSString* commandPrefKey = base::SysUTF8ToNSString(
       app_group::kChromeAppGroupCommandCommandPreference);
+
+  if (parameter) {
+    NSString* paramPrefKey = base::SysUTF8ToNSString(
+        app_group::kChromeAppGroupCommandParameterPreference);
+    return @{
+      timePrefKey : [NSDate date],
+      appPrefKey : @"TodayExtension",
+      commandPrefKey : command,
+      paramPrefKey : parameter,
+    };
+  }
   return @{
     timePrefKey : [NSDate date],
     appPrefKey : @"TodayExtension",
     commandPrefKey : command,
   };
 }
 
 @end