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1 // Copyright 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #import "ui/base/ios/cru_context_menu_controller.h" | |
6 | |
7 #include <algorithm> | |
8 | |
9 #include "base/ios/weak_nsobject.h" | |
10 #include "base/logging.h" | |
11 #import "base/mac/scoped_nsobject.h" | |
12 #include "ui/base/device_form_factor.h" | |
13 #import "ui/base/ios/cru_context_menu_holder.h" | |
14 #include "ui/base/l10n/l10n_util.h" | |
15 #include "ui/strings/grit/ui_strings.h" | |
16 | |
17 // Abstracts system implementation of popovers and action sheets. | |
18 @protocol CRUContextMenuControllerImpl<NSObject> | |
19 | |
20 // Whether the context menu is visible. | |
21 @property(nonatomic, readonly, getter=isVisible) BOOL visible; | |
22 | |
23 // Displays a context menu. | |
24 - (void)showWithHolder:(CRUContextMenuHolder*)menuHolder | |
25 atPoint:(CGPoint)localPoint | |
26 inView:(UIView*)view; | |
27 | |
28 // Dismisses displayed context menu. | |
29 - (void)dismissAnimated:(BOOL)animated | |
30 completionHandler:(ProceduralBlock)completionHandler; | |
31 | |
32 @end | |
33 | |
34 // Backs up CRUContextMenuController by using UIAlertController. | |
35 @interface CRUAlertController : NSObject<CRUContextMenuControllerImpl> { | |
36 // Weak underlying UIAlertController. | |
37 base::WeakNSObject<UIAlertController> _alert; | |
38 } | |
39 // Redefined to readwrite. | |
40 @property(nonatomic, readwrite, getter=isVisible) BOOL visible; | |
41 @end | |
42 | |
43 // Displays a context menu. Implements Bridge pattern. | |
44 @implementation CRUContextMenuController { | |
45 // Implementation specific for iOS version. | |
46 base::scoped_nsprotocol<id<CRUContextMenuControllerImpl>> _impl; | |
47 } | |
48 | |
49 - (BOOL)isVisible { | |
50 return [_impl isVisible]; | |
51 } | |
52 | |
53 - (instancetype)init { | |
54 self = [super init]; | |
55 if (self) { | |
56 _impl.reset([[CRUAlertController alloc] init]); | |
57 } | |
58 return self; | |
59 } | |
60 | |
61 - (void)dealloc { | |
62 [_impl dismissAnimated:NO completionHandler:nil]; | |
63 [super dealloc]; | |
64 } | |
65 | |
66 - (void)showWithHolder:(CRUContextMenuHolder*)menuHolder | |
67 atPoint:(CGPoint)point | |
68 inView:(UIView*)view { | |
69 DCHECK(menuHolder.itemCount); | |
70 // Check that the view is still visible on screen, otherwise just return and | |
71 // don't show the context menu. | |
72 if (![view window] && ![view isKindOfClass:[UIWindow class]]) | |
73 return; | |
74 [_impl showWithHolder:menuHolder atPoint:point inView:view]; | |
75 } | |
76 | |
77 - (void)dismissAnimated:(BOOL)animated | |
78 completionHandler:(ProceduralBlock)completionHandler { | |
79 [_impl dismissAnimated:animated completionHandler:completionHandler]; | |
80 } | |
81 | |
82 @end | |
83 | |
84 @implementation CRUAlertController | |
85 @synthesize visible = _visible; | |
86 | |
87 - (CGSize)sizeForTitleThatFitsMenuWithHolder:(CRUContextMenuHolder*)menuHolder | |
88 atPoint:(CGPoint)point | |
89 inView:(UIView*)view { | |
90 // Presenting and dismissing a dummy UIAlertController flushes a screen. | |
91 // As a workaround return an estimation of the space available depending | |
92 // on the device's type. | |
93 const CGFloat kAvailableWidth = 320; | |
94 const CGFloat kAvailableHeightTablet = 200; | |
95 const CGFloat kAvailableHeightPhone = 100; | |
96 if (ui::GetDeviceFormFactor() == ui::DEVICE_FORM_FACTOR_TABLET) { | |
97 return CGSizeMake(kAvailableWidth, kAvailableHeightTablet); | |
98 } | |
99 return CGSizeMake(kAvailableWidth, kAvailableHeightPhone); | |
100 } | |
101 | |
102 - (void)showWithHolder:(CRUContextMenuHolder*)menuHolder | |
103 atPoint:(CGPoint)point | |
104 inView:(UIView*)view { | |
105 UIAlertController* alert = [UIAlertController | |
106 alertControllerWithTitle:menuHolder.menuTitle | |
107 message:nil | |
108 preferredStyle:UIAlertControllerStyleActionSheet]; | |
109 alert.popoverPresentationController.sourceView = view; | |
110 alert.popoverPresentationController.sourceRect = | |
111 CGRectMake(point.x, point.y, 1.0, 1.0); | |
112 | |
113 // Add the actions. | |
114 base::WeakNSObject<CRUAlertController> weakSelf(self); | |
115 [menuHolder.itemTitles enumerateObjectsUsingBlock:^(NSString* itemTitle, | |
116 NSUInteger itemIndex, | |
117 BOOL*) { | |
118 void (^actionHandler)(UIAlertAction*) = ^(UIAlertAction* action) { | |
119 [menuHolder performActionAtIndex:itemIndex]; | |
120 [weakSelf setVisible:NO]; | |
121 }; | |
122 [alert addAction:[UIAlertAction actionWithTitle:itemTitle | |
123 style:UIAlertActionStyleDefault | |
124 handler:actionHandler]]; | |
125 }]; | |
126 | |
127 // Cancel button goes last, to match other browsers. | |
128 void (^cancelHandler)(UIAlertAction*) = ^(UIAlertAction* action) { | |
129 [weakSelf setVisible:NO]; | |
130 }; | |
131 UIAlertAction* cancel_action = | |
132 [UIAlertAction actionWithTitle:l10n_util::GetNSString(IDS_APP_CANCEL) | |
133 style:UIAlertActionStyleCancel | |
134 handler:cancelHandler]; | |
135 [alert addAction:cancel_action]; | |
136 | |
137 // Present sheet/popover using controller that is added to view hierarchy. | |
138 UIViewController* topController = view.window.rootViewController; | |
139 while (topController.presentedViewController) | |
140 topController = topController.presentedViewController; | |
141 [topController presentViewController:alert animated:YES completion:nil]; | |
142 self.visible = YES; | |
143 _alert.reset(alert); | |
144 } | |
145 | |
146 - (void)dismissAnimated:(BOOL)animated | |
147 completionHandler:(ProceduralBlock)completionHandler { | |
148 [_alert dismissViewControllerAnimated:animated completion:completionHandler]; | |
149 } | |
150 | |
151 @end | |
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