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| 1 // Copyright 2016 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 // ====== New Architecture ===== | |
| 6 // = This code is only used in the new iOS Chrome architecture. = | |
| 7 // ============================================================================ | |
| 8 | |
| 9 #import "ios/chrome/browser/ui/strip/strip_container_view_controller.h" | |
| 10 | |
| 11 #import "ios/chrome/browser/ui/ui_types.h" | |
| 12 #import "ios/chrome/browser/ui/actions/tab_strip_actions.h" | |
| 13 | |
| 14 #if !defined(__has_feature) || !__has_feature(objc_arc) | |
| 15 #error "This file requires ARC support." | |
| 16 #endif | |
| 17 | |
| 18 namespace { | |
| 19 CGFloat kStripHeight = 200.0; | |
| 20 } | |
| 21 | |
| 22 @interface StripContainerViewController ()<TabStripActions> | |
| 23 | |
| 24 // Whichever view controller is at the top of the screen. This view controller | |
| 25 // controls the status bar. | |
| 26 @property(nonatomic, weak) UIViewController* topmostViewController; | |
| 27 | |
| 28 @property(nonatomic, strong) Constraints* contentConstraintsWithStrip; | |
| 29 @property(nonatomic, strong) Constraints* contentConstraintsWithoutStrip; | |
| 30 @property(nonatomic, strong) Constraints* stripConstraints; | |
| 31 | |
| 32 // Cache for forwarding methods to child view controllers. | |
| 33 @property(nonatomic, assign) SEL actionToForward; | |
| 34 @property(nonatomic, weak) UIResponder* forwardingTarget; | |
| 35 | |
| 36 @property(nonatomic, strong) NSLayoutConstraint* stripHeightConstraint; | |
| 37 | |
| 38 // Contained view controller utility methods. | |
| 39 - (void)removeChildViewController:(UIViewController*)viewController; | |
| 40 | |
| 41 // Called after a new content view controller is set, but before | |
| 42 // |-didMoveToParentViewController:| is called on that view controller. | |
| 43 - (void)didAddContentViewController; | |
| 44 | |
| 45 // Called after a new strip view controller is set, but before | |
| 46 // |-didMoveToParentViewController:| is called on that view controller. | |
| 47 - (void)didAddStripViewController; | |
| 48 | |
| 49 // Methods to populate the constraint properties. | |
| 50 - (void)updateContentConstraintsWithStrip; | |
| 51 - (void)updateContentConstraintsWithoutStrip; | |
| 52 - (void)updateStripConstraints; | |
| 53 | |
| 54 @end | |
| 55 | |
| 56 @implementation StripContainerViewController | |
| 57 | |
| 58 @synthesize contentViewController = _contentViewController; | |
| 59 @synthesize stripViewController = _stripViewController; | |
| 60 @synthesize topmostViewController = _topmostViewController; | |
| 61 @synthesize contentConstraintsWithStrip = _contentConstraintsWithStrip; | |
| 62 @synthesize contentConstraintsWithoutStrip = _contentConstraintsWithoutStrip; | |
| 63 @synthesize stripConstraints = _stripConstraints; | |
| 64 @synthesize actionToForward = _actionToForward; | |
| 65 @synthesize forwardingTarget = _forwardingTarget; | |
| 66 @synthesize stripHeightConstraint = _stripHeightConstraint; | |
| 67 | |
| 68 #pragma mark - Public properties | |
| 69 | |
| 70 - (void)setContentViewController:(UIViewController*)contentViewController { | |
| 71 if (self.contentViewController == contentViewController) | |
| 72 return; | |
| 73 | |
| 74 // Remove the current content view controller, if any. | |
| 75 [NSLayoutConstraint | |
| 76 deactivateConstraints:self.contentConstraintsWithoutStrip]; | |
| 77 [NSLayoutConstraint deactivateConstraints:self.contentConstraintsWithStrip]; | |
| 78 [self removeChildViewController:self.contentViewController]; | |
| 79 | |
| 80 // Add the new content view controller. | |
| 81 [self addChildViewController:contentViewController]; | |
| 82 contentViewController.view.translatesAutoresizingMaskIntoConstraints = NO; | |
| 83 [self.view addSubview:contentViewController.view]; | |
| 84 _contentViewController = contentViewController; | |
| 85 [self didAddContentViewController]; | |
| 86 [self.view setNeedsUpdateConstraints]; | |
| 87 [self.contentViewController didMoveToParentViewController:self]; | |
| 88 } | |
| 89 | |
| 90 - (void)setStripViewController:(UIViewController*)stripViewController { | |
| 91 if (self.stripViewController == stripViewController) | |
| 92 return; | |
| 93 | |
| 94 // Remove the current strip view controller, if any. | |
| 95 [NSLayoutConstraint deactivateConstraints:self.stripConstraints]; | |
| 96 [NSLayoutConstraint deactivateConstraints:self.contentConstraintsWithStrip]; | |
| 97 [self removeChildViewController:self.stripViewController]; | |
| 98 | |
| 99 // Add the new strip view controller. | |
| 100 [self addChildViewController:stripViewController]; | |
| 101 stripViewController.view.translatesAutoresizingMaskIntoConstraints = NO; | |
| 102 [self.view addSubview:stripViewController.view]; | |
| 103 _stripViewController = stripViewController; | |
| 104 [self didAddStripViewController]; | |
| 105 [self.view setNeedsUpdateConstraints]; | |
| 106 [self.stripViewController didMoveToParentViewController:self]; | |
| 107 } | |
| 108 | |
| 109 #pragma mark - UIViewController | |
| 110 | |
| 111 - (void)updateViewConstraints { | |
| 112 if (self.stripViewController) { | |
| 113 [NSLayoutConstraint activateConstraints:self.stripConstraints]; | |
| 114 [NSLayoutConstraint activateConstraints:self.contentConstraintsWithStrip]; | |
| 115 } else { | |
| 116 [NSLayoutConstraint | |
| 117 activateConstraints:self.contentConstraintsWithoutStrip]; | |
| 118 } | |
| 119 [super updateViewConstraints]; | |
| 120 } | |
| 121 | |
| 122 - (UIViewController*)childViewControllerForStatusBarHidden { | |
| 123 return self.topmostViewController; | |
| 124 } | |
| 125 | |
| 126 - (UIViewController*)childViewControllerForStatusBarStyle { | |
| 127 return self.topmostViewController; | |
| 128 } | |
| 129 | |
| 130 #pragma mark - UIResponder | |
| 131 | |
| 132 // Before forwarding actions up the responder chain, give both contained | |
| 133 // view controllers a chance to handle them. | |
| 134 - (BOOL)canPerformAction:(SEL)action withSender:(id)sender { | |
| 135 self.actionToForward = nullptr; | |
| 136 self.forwardingTarget = nil; | |
| 137 for (UIResponder* responder in | |
| 138 @[ self.contentViewController, self.stripViewController ]) { | |
| 139 if ([responder canPerformAction:action withSender:sender]) { | |
| 140 self.actionToForward = action; | |
| 141 self.forwardingTarget = responder; | |
| 142 return YES; | |
| 143 } | |
| 144 } | |
| 145 return [super canPerformAction:action withSender:sender]; | |
| 146 } | |
| 147 | |
| 148 #pragma mark - NSObject method forwarding | |
| 149 | |
| 150 - (id)forwardingTargetForSelector:(SEL)aSelector { | |
| 151 if (aSelector == self.actionToForward) { | |
| 152 return self.forwardingTarget; | |
| 153 } | |
| 154 return nil; | |
| 155 } | |
| 156 | |
| 157 #pragma mark - TabStripActions | |
| 158 | |
| 159 // Action to toggle visibility of tab strip. | |
| 160 - (void)toggleTabStrip:(id)sender { | |
| 161 self.stripHeightConstraint.constant = | |
| 162 self.stripHeightConstraint.constant > 0 ? 0.0 : kStripHeight; | |
| 163 } | |
| 164 | |
| 165 #pragma mark - Private methods | |
| 166 | |
| 167 - (void)removeChildViewController:(UIViewController*)viewController { | |
| 168 if (viewController.parentViewController != self) | |
| 169 return; | |
| 170 [viewController willMoveToParentViewController:nil]; | |
| 171 [viewController.view removeFromSuperview]; | |
| 172 [viewController removeFromParentViewController]; | |
| 173 } | |
| 174 | |
| 175 - (void)didAddContentViewController { | |
| 176 if (self.stripViewController) { | |
| 177 [self updateContentConstraintsWithStrip]; | |
| 178 } else { | |
| 179 self.topmostViewController = self.contentViewController; | |
| 180 [self updateContentConstraintsWithoutStrip]; | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 - (void)didAddStripViewController { | |
| 185 [self updateStripConstraints]; | |
| 186 // If there's already a content view controller, update the constraints for | |
| 187 // that, too. | |
| 188 if (self.contentViewController) { | |
| 189 [self updateContentConstraintsWithStrip]; | |
| 190 } | |
| 191 self.topmostViewController = self.stripViewController; | |
| 192 } | |
| 193 | |
| 194 - (void)updateContentConstraintsWithoutStrip { | |
| 195 UIView* contentView = self.contentViewController.view; | |
| 196 self.contentConstraintsWithoutStrip = @[ | |
| 197 [contentView.topAnchor constraintEqualToAnchor:self.view.topAnchor], | |
| 198 [contentView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor], | |
| 199 [contentView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor], | |
| 200 [contentView.trailingAnchor | |
| 201 constraintEqualToAnchor:self.view.trailingAnchor], | |
| 202 ]; | |
| 203 } | |
| 204 | |
| 205 - (void)updateContentConstraintsWithStrip { | |
| 206 UIView* contentView = self.contentViewController.view; | |
| 207 self.contentConstraintsWithStrip = @[ | |
| 208 [contentView.topAnchor | |
| 209 constraintEqualToAnchor:self.stripViewController.view.bottomAnchor], | |
| 210 [contentView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor], | |
| 211 [contentView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor], | |
| 212 [contentView.trailingAnchor | |
| 213 constraintEqualToAnchor:self.view.trailingAnchor], | |
| 214 ]; | |
| 215 } | |
| 216 | |
| 217 - (void)updateStripConstraints { | |
| 218 UIView* stripView = self.stripViewController.view; | |
| 219 self.stripHeightConstraint = | |
| 220 [stripView.heightAnchor constraintEqualToConstant:0.0]; | |
| 221 self.stripConstraints = @[ | |
| 222 [stripView.topAnchor constraintEqualToAnchor:self.view.topAnchor], | |
| 223 [stripView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor], | |
| 224 [stripView.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor], | |
| 225 self.stripHeightConstraint, | |
| 226 ]; | |
| 227 } | |
| 228 | |
| 229 @end | |
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Chromium Code Reviews
Issue 2592983003:
[Clean Skeleton] Migrate code to clean/ (Closed)
