Implement CredentialItemView and tests for the Mac account chooser.

chrome/browser/ui/cocoa/passwords/credential_item_view.h

Index: chrome/browser/ui/cocoa/passwords/credential_item_view.h
diff --git a/chrome/browser/ui/cocoa/passwords/credential_item_view.h b/chrome/browser/ui/cocoa/passwords/credential_item_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..670843d089b22eda535535318fcb25ee87e45e91
--- /dev/null
+++ b/chrome/browser/ui/cocoa/passwords/credential_item_view.h
@@ -0,0 +1,75 @@
+// 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 CHROME_BROWSER_UI_COCOA_PASSWORDS_CREDENTIAL_ITEM_VIEW_H_
+#define CHROME_BROWSER_UI_COCOA_PASSWORDS_CREDENTIAL_ITEM_VIEW_H_
+
+#import <Cocoa/Cocoa.h>
+
+#import "base/mac/scoped_nsobject.h"
+#include "components/autofill/core/common/password_form.h"
+#include "components/password_manager/content/common/credential_manager_types.h"
+
+class GURL;
+
+@class CredentialItemView;
+
+// Handles user interaction with and image fetching for a CredentialItemView.

[groby-ooo-7-16, 2015/02/19 17:01:33]

Question: This functionality is presumably shared with non-Cocoa platforms,
correct?

In that case, wouldn't it make sense to have a cross-platform delegate API? Or
does this need to be platform-specific?

[dconnelly, 2015/02/20 15:36:06]

ManagePasswordsBubbleModel is the cross-platform delegate, but it only handles
stuff related to interacting with the model. This delegate is for
platform-specific UI cleanup stuff -- see the implementations in the
ManagePasswordsBubbleAccountChooserViewController. They mostly dismiss the view
and delegate to the BubbleModel.

I guess there could be a cross-platform UI delegate API, but it wouldn't be in
ObjC, so I'd have to do an embedded-bridge-dance thing to implement it with a
view controller. It's possible, though. WDYT?

+@protocol CredentialItemDelegate<NSObject>
+
+// Retrieves the image located at |avatarURL| and updates |view| by calling
+// [CredentialItemView updateAvatar:] if successful.
+- (void)fetchAvatar:(const GURL&)avatarURL forView:(CredentialItemView*)view;
+
+// Indicates that the user has selected the credential corresponding to
+// |passwordForm| and |credentialType|.
+- (void)selectPasswordForm:(const autofill::PasswordForm&)passwordForm
+            credentialType:(password_manager::CredentialType)credentialType;
+
+@end
+
+// A user-clickable view to show a single account credential.
+@interface CredentialItemView : NSButton {
+  autofill::PasswordForm passwordForm_;
+  password_manager::CredentialType credentialType_;
+  base::scoped_nsobject<NSTextField> nameLabel_;
+  base::scoped_nsobject<NSTextField> usernameLabel_;
+  base::scoped_nsobject<NSImageView> avatarView_;
+  id<CredentialItemDelegate> delegate_;
+}
+
+// Initializes an item view populated with the data in |passwordForm|. Informs
+// |delegate| of user interactions and uses it to fetch avatar images.
+- (id)initWithPasswordForm:(const autofill::PasswordForm&)passwordForm
+            credentialType:(password_manager::CredentialType)credentialType
+                  delegate:(id<CredentialItemDelegate>)delegate;
+
+// Sets a custom avatar for this item. The image should be scaled and cropped
+// to a circle of size |kAvatarImageSize|, otherwise it will look ridiculous.
+- (void)updateAvatar:(NSImage*)avatar;
+
+// The default avatar image, used when a custom one is not set.
++ (NSImage*)defaultAvatar;
+
+@end
+
+@interface CredentialItemView(Testing)

[groby-ooo-7-16, 2015/02/19 17:01:33]

Any reason this can't just live in the test file?

[dconnelly, 2015/02/20 15:36:06]

Done.

+@property(readonly) NSTextField* nameLabel;
+@property(readonly) NSTextField* usernameLabel;
+@property(readonly) NSImageView* avatarView;
+@end
+
+// A container view that shows a list of CredentialItemViews.
+@interface CredentialItemListView : NSView
+
+// Initializes a list view with the specified array of |CredentialItemView|s.
+- (id)initWithItems:(NSArray*)items;
+
+@end
+
+@interface CredentialItemListView(Testing)
+@property(readonly) NSArray* items;

[groby-ooo-7-16, 2015/02/19 17:01:33]

Why not just use subviews?

[dconnelly, 2015/02/20 15:36:06]

Done.

+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_PASSWORDS_CREDENTIAL_ITEM_VIEW_H_