Merge MatrixKit develop with commit hash: b85b736313bec0592bd1cabc68035d97f5331137

Riot/Modules/MatrixKit/Controllers/MXKPreviewViewController.m

@@ -0,0 +1,104 @@
+/*
+ Copyright 2020 Vector Creations Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#import "MXKPreviewViewController.h"
+@import QuickLook;
+
+@interface MXKPreviewViewController () <QLPreviewControllerDataSource>
+
+/// A specialized view controller for previewing an item.
+@property (nonatomic, weak) QLPreviewController *previewController;
+
+/// URL of the file to preview
+@property (nonatomic, strong) NSURL *fileURL;
+
+/// YES to display actions Button. NO otherwise
+@property (nonatomic) BOOL allowActions;
+
+@property (nonatomic, weak) id<MXKPreviewViewControllerDelegate> previewDelegate;
+
+@end
+
+@implementation MXKPreviewViewController
+
++ (MXKPreviewViewController *)presentFrom:(UIViewController *)presenting fileUrl:(NSURL *)fileUrl allowActions:(BOOL)allowActions delegate:(nullable id<MXKPreviewViewControllerDelegate>)delegate
+{
+    MXKPreviewViewController *previewController = [[MXKPreviewViewController alloc] initWithFileUrl: fileUrl allowActions: allowActions];
+    previewController.previewDelegate = delegate;
+    if ([delegate respondsToSelector:@selector(previewViewControllerWillBeginPreview:)]) {
+        [delegate previewViewControllerWillBeginPreview:previewController];
+    }
+    [presenting presentViewController:previewController animated:YES completion:^{
+    }];
+    
+    return previewController;
+}
+
+- (instancetype)initWithFileUrl: (NSURL *)fileUrl allowActions: (BOOL)allowActions
+{
+    QLPreviewController *previewController = [[QLPreviewController alloc] init];
+    self = [super initWithRootViewController:previewController];
+    self.previewController = previewController;
+    
+    if (self)
+    {
+        self.modalPresentationStyle = UIModalPresentationFullScreen;
+        self.fileURL = fileUrl;
+        self.allowActions = allowActions;
+        self.previewController.dataSource = self;
+        self.previewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneAction:)];
+    }
+    
+    return self;
+}
+
+- (void)viewDidLayoutSubviews
+{
+    [super viewDidLayoutSubviews];
+    
+    if (!self.allowActions)
+    {
+        NSMutableArray *items = [NSMutableArray arrayWithArray: self.previewController.navigationItem.rightBarButtonItems];
+        if (items.count > 0)
+        {
+            [items removeObjectAtIndex:0];
+        }
+        self.previewController.navigationItem.rightBarButtonItems = items;
+    }
+}
+
+- (IBAction)doneAction:(id)sender
+{
+    [self dismissViewControllerAnimated:YES completion:^{
+        if ([self.previewDelegate respondsToSelector:@selector(previewViewControllerDidEndPreview:)]) {
+            [self.previewDelegate previewViewControllerDidEndPreview:self];
+        }
+    }];
+}
+
+#pragma mark - QLPreviewControllerDataSource
+
+- (NSInteger)numberOfPreviewItemsInPreviewController:(nonnull QLPreviewController *)controller
+{
+    return self.fileURL ? 1 : 0;
+}
+
+- (nonnull id<QLPreviewItem>)previewController:(nonnull QLPreviewController *)controller previewItemAtIndex:(NSInteger)index
+{
+    return self.fileURL;
+}
+
+@end