Upstream Chrome on iOS source code [8/11].

ios/chrome/browser/ui/settings/sync_encryption_passphrase_collection_view_controller.h

+// Copyright 2015 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_SETTINGS_SYNC_ENCRYPTION_PASSPHRASE_COLLECTION_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_SETTINGS_SYNC_ENCRYPTION_PASSPHRASE_COLLECTION_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/chrome/browser/sync/sync_observer_bridge.h"
+#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
+#import "ios/chrome/browser/ui/settings/settings_root_collection_view_controller.h"
+
+namespace ios {
+class ChromeBrowserState;
+}  // namespace ios
+
+namespace ios_internal {
+namespace sync_encryption_passphrase {
+typedef NS_ENUM(NSInteger, SectionIdentifier) {
+  SectionIdentifierPassphrase = kSectionIdentifierEnumZero,
+  SectionIdentifierFooter,
+};
+typedef NS_ENUM(NSInteger, ItemType) {
+  ItemTypeMessage = kItemTypeEnumZero,
+  ItemTypeEnterPassphrase,
+  ItemTypeConfirmPassphrase,
+  ItemTypeError,
+  ItemTypeFooter,
+};
+}  // namespace sync_encryption_passphrase
+}  // namespace ios_internal
+
+// Controller to allow user to specify encryption passphrase for Sync.
+@interface SyncEncryptionPassphraseCollectionViewController
+    : SettingsRootCollectionViewController<SyncObserverModelBridge>
+
+@property(nonatomic, readonly) UITextField* passphrase;
+@property(nonatomic, copy) NSString* headerMessage;
+@property(nonatomic, copy) NSString* footerMessage;
+@property(nonatomic, copy) NSString* processingMessage;
+@property(nonatomic, copy) NSString* syncErrorMessage;
+
+// |browserState| must not be nil.
+- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
+    NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
+    NS_UNAVAILABLE;
+
+@end
+
+@interface SyncEncryptionPassphraseCollectionViewController (
+    Subclassing)<UITextFieldDelegate>
+
+// Whether this controller is for encryption or decryption. Returns |YES|, if
+// the used for the user to enter an existing passphrase that is not yet
+// available on the device. Returns |NO| if the user is setting a new
+// passphrase.
+- (BOOL)forDecryption;
+
+// User has pressed the Sign In button.
+- (void)signInPressed;
+
+// Clears all fields after displaying an error.
+- (void)clearFieldsOnError:(NSString*)errorMessage;
+
+// Whether the text field(s) is(are) filled.
+- (BOOL)areAllFieldsFilled;
+
+// Registers listening to the events of |textField|.
+- (void)registerTextField:(UITextField*)textField;
+
+// Unregisters listening to the events of |textField|.
+- (void)unregisterTextField:(UITextField*)textField;
+
+// Called after a touch event entering a |UITextField|.
+- (void)textFieldDidBeginEditing:(id)sender;
+
+// Called after a touch event changing a |UITextField|.
+- (void)textFieldDidChange:(id)sender;
+
+// Called after a touch event leaving a |UITextField| by clicking "return" key.
+- (void)textFieldDidEndEditing:(id)sender;
+
+// Stops observing the sync service. This is required during the shutdown phase
+// to avoid observing sync events for a browser state that is being killed.
+- (void)stopObserving;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_SYNC_ENCRYPTION_PASSPHRASE_COLLECTION_VIEW_CONTROLLER_H_