mirror of
https://github.com/vector-im/element-ios.git
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8f3736c403
- the keyboard bubble should be darker too
277 lines
10 KiB
Objective-C
277 lines
10 KiB
Objective-C
/*
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Copyright 2015 OpenMarket Ltd
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Copyright 2017 Vector Creations Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "UIViewController+RiotSearch.h"
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#import <objc/runtime.h>
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#import "RiotDesignValues.h"
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/**
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`UIViewControllerRiotSearchInternals` is the internal single point storage for the search feature.
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It hosts all required data so that only one associated object can be used in the category.
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*/
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@interface UIViewControllerRiotSearchInternals : NSObject
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// The search bar
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@property (nonatomic) UISearchBar *searchBar;
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@property (nonatomic) BOOL searchBarHidden;
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// Backup of view when displaying search
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@property (nonatomic) UIView *backupTitleView;
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@property (nonatomic) UIBarButtonItem *backupLeftBarButtonItem;
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@property (nonatomic) UIBarButtonItem *backupRightBarButtonItem;
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// The Riot empty search background image (champagne bubbles)
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@property (nonatomic) UIImageView *backgroundImageView;
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@property (nonatomic) NSLayoutConstraint *backgroundImageViewBottomConstraint;
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@end
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@implementation UIViewControllerRiotSearchInternals
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@end
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#pragma mark - UIViewController+RiotSearch
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#pragma mark -
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@interface UIViewController ()
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// The single associated object hosting all data.
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@property(nonatomic) UIViewControllerRiotSearchInternals *searchInternals;
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@end
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@implementation UIViewController (RiotSearch)
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- (UISearchBar *)searchBar
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{
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return self.searchInternals.searchBar;
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}
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- (BOOL)searchBarHidden
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{
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return self.searchInternals.searchBarHidden;
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}
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- (UIImageView*)backgroundImageView
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{
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return self.searchInternals.backgroundImageView;
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}
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- (NSLayoutConstraint *)backgroundImageViewBottomConstraint
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{
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return self.searchInternals.backgroundImageViewBottomConstraint;
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}
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- (void)showSearch:(BOOL)animated
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{
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if (self.searchInternals.searchBarHidden)
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{
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// Backup screen header before displaying the search bar in it
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self.searchInternals.backupTitleView = self.navigationItem.titleView;
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self.searchInternals.backupLeftBarButtonItem = self.navigationItem.leftBarButtonItem;
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self.searchInternals.backupRightBarButtonItem = self.navigationItem.rightBarButtonItem;
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self.searchInternals.searchBarHidden = NO;
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// Reset searches
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self.searchBar.text = @"";
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// Customize search bar
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self.searchBar.barStyle = kRiotDesignSearchBarStyle;
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self.searchBar.tintColor = kRiotDesignSearchBarTintColor;
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// Remove navigation buttons
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self.navigationItem.hidesBackButton = YES;
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self.navigationItem.rightBarButtonItem = nil;
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self.navigationItem.leftBarButtonItem = nil;
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// Add the search bar
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self.navigationItem.titleView = self.searchBar;
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// On iPad, there is no cancel button inside the UISearchBar
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// So, add a classic cancel right bar button
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if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad)
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{
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UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(onIPadCancelPressed:)];
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[self.navigationItem setRightBarButtonItem: cancelButton animated:YES];
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}
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}
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// And display the keyboard
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[self.searchBar becomeFirstResponder];
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}
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- (void)hideSearch:(BOOL)animated
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{
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if (!self.searchInternals.searchBarHidden)
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{
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// Restore the screen header
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self.navigationItem.hidesBackButton = NO;
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self.navigationItem.titleView = self.searchInternals.backupTitleView;
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self.navigationItem.leftBarButtonItem = self.searchInternals.backupLeftBarButtonItem;
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self.navigationItem.rightBarButtonItem = self.searchInternals.backupRightBarButtonItem;
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self.searchInternals.searchBarHidden = YES;
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}
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}
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- (void)addBackgroundImageViewToView:(UIView*)view
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{
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UIImage *searchBgImage = [MXKTools paintImage:[UIImage imageNamed:@"search_bg"] withColor:kRiotKeyboardColor];
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UIImageView *backgroundImageView = [[UIImageView alloc] initWithImage:searchBgImage];
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backgroundImageView.translatesAutoresizingMaskIntoConstraints = NO;
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[view addSubview:backgroundImageView];
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// Keep it at left
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NSLayoutConstraint *leftConstraint = [NSLayoutConstraint constraintWithItem:view
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:backgroundImageView
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attribute:NSLayoutAttributeLeading
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multiplier:1.0
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constant:0];
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// Same width as parent
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NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:view
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:backgroundImageView
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attribute:NSLayoutAttributeWidth
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multiplier:1.0f
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constant:0.0f];
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// Keep the image aspect ratio
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NSLayoutConstraint *aspectRatioConstraint = [NSLayoutConstraint
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constraintWithItem:backgroundImageView
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attribute:NSLayoutAttributeHeight
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relatedBy:NSLayoutRelationEqual
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toItem:backgroundImageView
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attribute:NSLayoutAttributeWidth
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multiplier:(backgroundImageView.frame.size.height / backgroundImageView.frame.size.width)
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constant:0];
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// Set its position according to its bottom
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NSLayoutConstraint *bottomConstraint = [NSLayoutConstraint constraintWithItem:view
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attribute:NSLayoutAttributeBottom
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relatedBy:NSLayoutRelationEqual
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toItem:backgroundImageView
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attribute:NSLayoutAttributeBottom
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multiplier:1.0f
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constant:216];
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[NSLayoutConstraint activateConstraints:@[leftConstraint,
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widthConstraint,
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aspectRatioConstraint,
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bottomConstraint
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]];
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self.searchInternals.backgroundImageView = backgroundImageView;
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self.searchInternals.backgroundImageViewBottomConstraint = bottomConstraint;
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// It will be showed once the keyboard appears
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backgroundImageView.hidden = YES;
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}
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- (void)setKeyboardHeightForBackgroundImage:(CGFloat)keyboardHeight
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{
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// keyboardHeight = 0 means no keyboard
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if (keyboardHeight > 0)
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{
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self.searchInternals.backgroundImageView.hidden = NO;
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// 60 = 18 + 42 from the Riot design
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self.searchInternals.backgroundImageViewBottomConstraint.constant = keyboardHeight - 60;
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}
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else
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{
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// Hide the search
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self.searchInternals.backgroundImageView.hidden = YES;
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}
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}
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#pragma mark - UISearchBarDelegate
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- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar2
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{
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// "Search" key has been pressed
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[self.searchBar resignFirstResponder];
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}
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- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar2
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{
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[self hideSearch:YES];
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}
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- (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar2
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{
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// Keep the search bar cancel button enabled even if the keyboard is not displayed
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dispatch_async(dispatch_get_main_queue(), ^{
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for (UIView *subView in self.searchBar.subviews)
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{
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for (UIView *view in subView.subviews)
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{
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if ([view isKindOfClass:[UIButton class]])
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{
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[(UIButton *)view setEnabled:YES];
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}
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}
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}
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});
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return YES;
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}
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#pragma mark - Private methods
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- (void)onIPadCancelPressed:(id)sender
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{
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// Mimic the same behavior as on iPhones and call the UISearchBar cancel delegate method
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if ([self.searchBar.delegate respondsToSelector:@selector(searchBarCancelButtonClicked:)])
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{
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[self.searchBar.delegate searchBarCancelButtonClicked:self.searchBar];
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}
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}
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#pragma mark - Internal associated object
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- (void)setSearchInternals:(UIViewControllerRiotSearchInternals *)searchInternals
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{
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objc_setAssociatedObject(self, @selector(searchInternals), searchInternals, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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- (UIViewControllerRiotSearchInternals *)searchInternals
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{
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UIViewControllerRiotSearchInternals *searchInternals = objc_getAssociatedObject(self, @selector(searchInternals));
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if (!searchInternals)
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{
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// Initialise internal data at the first call
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searchInternals = [[UIViewControllerRiotSearchInternals alloc] init];
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UISearchBar *searchBar = [[UISearchBar alloc] init];
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searchBar.showsCancelButton = YES;
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searchBar.delegate = (id<UISearchBarDelegate>)self;
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searchInternals.searchBar = searchBar;
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self.searchInternals = searchInternals;
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self.searchInternals.searchBarHidden = YES;
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}
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return searchInternals;
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}
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@end
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