Upstream code and resources for Chrome on iOS extensions.

ios/chrome/today_extension/footer_label.h

Index: ios/chrome/today_extension/footer_label.h
diff --git a/ios/chrome/today_extension/footer_label.h b/ios/chrome/today_extension/footer_label.h
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+// 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_TODAY_EXTENSION_FOOTER_LABEL_H_
+#define IOS_CHROME_TODAY_EXTENSION_FOOTER_LABEL_H_
+
+#import <CoreGraphics/CoreGraphics.h>
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+#import <base/ios/block_types.h>
+
+// IDs of the different footer labels that can be displayed.
+enum FooterLabel {
+  NO_FOOTER_LABEL,
+  PW_BT_OFF_FOOTER_LABEL,
+  PW_IS_ON_FOOTER_LABEL,
+  PW_IS_OFF_FOOTER_LABEL,
+  PW_OPTIN_DIALOG,
+  PW_SCANNING_FOOTER_LABEL,
+  FOOTER_LABEL_COUNT,
+};
+
+typedef void (^LearnMoreBlock)(void);
+typedef void (^EnableDisableBlock)(void);
+
+// Protocol that all footer labels must implement to make layout of today
+// extension possible.
+@protocol FooterLabel<NSObject>
+
+// Computes the size needed to display the footer label with the given |width|.
+- (CGFloat)heightForWidth:(CGFloat)width;
+
+// The view containing the footer label.
+- (UIView*)view;
+
+@end
+
+// Generic class for footer label. This label can contain one link (delimited
+// by BEGIN_LINK and END_LINK in label string) and a button (if buttonString and
+// buttonBlock are both non nil).
+@interface SimpleFooterLabel : NSObject<FooterLabel>
+
+- (instancetype)initWithLabelString:(NSString*)labelString
+                       buttonString:(NSString*)buttonString
+                          linkBlock:(ProceduralBlock)linkBlock
+                        buttonBlock:(ProceduralBlock)buttonBlock;
+
+@end
+
+// The footer label displaying information that physical web is on.
+// Contains a learn more link and a disable button.
+@interface PWIsOnFooterLabel : SimpleFooterLabel
+
+- (instancetype)initWithLearnMoreBlock:(LearnMoreBlock)learnMore
+                          turnOffBlock:(EnableDisableBlock)turnOffBlock;
+
+@end
+
+// The footer label displaying information that physical web is off.
+// Contains a learn more link and an enable button.
+@interface PWIsOffFooterLabel : SimpleFooterLabel
+
+- (instancetype)initWithLearnMoreBlock:(LearnMoreBlock)learnMore
+                           turnOnBlock:(EnableDisableBlock)turnOnBlock;
+
+@end
+
+// The footer label displaying information that physical web is scanning.
+// Contains a learn more link and a disable button.
+@interface PWScanningFooterLabel : SimpleFooterLabel
+
+- (instancetype)initWithLearnMoreBlock:(LearnMoreBlock)learnMore
+                          turnOffBlock:(EnableDisableBlock)turnOffBlock;
+
+@end
+
+// The footer label displaying information that Bluetooth is off.
+@interface PWBTOffFooterLabel : SimpleFooterLabel
+
+- (instancetype)initWithLearnMoreBlock:(LearnMoreBlock)learnMore;
+
+@end
+
+#endif  // IOS_CHROME_TODAY_EXTENSION_FOOTER_LABEL_H_