Gallery of images

ownCloud.xcodeproj/project.pbxproj

@@ -81,6 +81,7 @@
 		6E586CFC2199A72600F680C4 /* OpenInAction.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6E586CFB2199A72600F680C4 /* OpenInAction.swift */; };
 		6E586CFE2199A75900F680C4 /* MoveAction.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6E586CFD2199A75900F680C4 /* MoveAction.swift */; };
 		6E586D002199A78E00F680C4 /* DeleteAction.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6E586CFF2199A78E00F680C4 /* DeleteAction.swift */; };
+		6E5FC172221590B000F60846 /* GalleryHostViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6E5FC171221590B000F60846 /* GalleryHostViewController.swift */; };
 		6E83C77E20A32C1B0066EC23 /* SettingsSection.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6E83C77D20A32C1B0066EC23 /* SettingsSection.swift */; };
 		6E83C78420A33C180066EC23 /* LAContext+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6E83C78320A33C180066EC23 /* LAContext+Extension.swift */; };
 		6E91F37E21ECA6FD009436D2 /* CopyAction.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6E91F37D21ECA6FD009436D2 /* CopyAction.swift */; };
@@ -536,6 +537,7 @@
 		6E586CFB2199A72600F680C4 /* OpenInAction.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OpenInAction.swift; sourceTree = "<group>"; };
 		6E586CFD2199A75900F680C4 /* MoveAction.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MoveAction.swift; sourceTree = "<group>"; };
 		6E586CFF2199A78E00F680C4 /* DeleteAction.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DeleteAction.swift; sourceTree = "<group>"; };
+		6E5FC171221590B000F60846 /* GalleryHostViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GalleryHostViewController.swift; sourceTree = "<group>"; };
 		6E83C77D20A32C1B0066EC23 /* SettingsSection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsSection.swift; sourceTree = "<group>"; };
 		6E83C78320A33C180066EC23 /* LAContext+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "LAContext+Extension.swift"; sourceTree = "<group>"; };
 		6E91F37D21ECA6FD009436D2 /* CopyAction.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CopyAction.swift; sourceTree = "<group>"; };
@@ -761,6 +763,7 @@
 		233BDE9E204FEFE500C06732 /* ownCloud */ = {
 			isa = PBXGroup;
 			children = (
+				6E8E3CAB2213287500BF8BDB /* Gallery */,
 				23EC774D2137F3CD0032D4E6 /* Viewer */,
 				233BDE9F204FEFE500C06732 /* AppDelegate.swift */,
 				DCF4F1612051925A00189B9A /* Bookmarks */,
@@ -959,6 +962,14 @@
 			path = "Actions+Extensions";
 			sourceTree = "<group>";
 		};
+		6E8E3CAB2213287500BF8BDB /* Gallery */ = {
+			isa = PBXGroup;
+			children = (
+				6E5FC171221590B000F60846 /* GalleryHostViewController.swift */,
+			);
+			path = Gallery;
+			sourceTree = "<group>";
+		};
 		DC1B26FD209CF0D2004715E1 /* Issues Animators */ = {
 			isa = PBXGroup;
 			children = (
@@ -1839,6 +1850,7 @@
 				232B01F62126B10900366FA0 /* MoreStaticTableViewController.swift in Sources */,
 				6E91F37E21ECA6FD009436D2 /* CopyAction.swift in Sources */,
 				593BAB97209F8A0500023634 /* AppLockManager.swift in Sources */,
+				6E5FC172221590B000F60846 /* GalleryHostViewController.swift in Sources */,
 				DC85493421831B0B00782BA8 /* Tools.swift in Sources */,
 				DCFED972208095E200A2D984 /* ClientItemCell.swift in Sources */,
 				23E22BB720C6A5C40024D11E /* UIDevice+UIUserInterfaceIdiom.swift in Sources */,

ownCloud/Client/ClientQueryViewController.swift

@@ -310,16 +310,21 @@ class ClientQueryViewController: UITableViewController, Themeable {
 							lastTappedItemLocalID = rowItem.localID
 
 							core.downloadItem(rowItem, options: [ .returnImmediatelyIfOfflineOrUnavailable : true ]) { [weak self, query] (error, core, item, _) in
+
+								guard let `self` = self else { return }
 								OnMainThread {
 									if (error == nil) || (error as NSError?)?.isOCError(withCode: .itemNotAvailableOffline) == true {
-										if let item = item, item.localID == self?.lastTappedItemLocalID, let core = core {
-											let itemViewController = DisplayHostViewController(for: item, with: core, root: query.rootItem!)
-											self?.navigationController?.pushViewController(itemViewController, animated: true)
+										if let item = item, let core = core {
+											if item.localID == self.lastTappedItemLocalID {
+												let itemViewController = GalleryHostViewController(core: core, selectedItem: item, query: query)
+												itemViewController.hidesBottomBarWhenPushed = true
+												self.navigationController?.pushViewController(itemViewController, animated: true)
+											}
 										}
 									}
 
-									if self?.lastTappedItemLocalID == item?.localID {
-										self?.lastTappedItemLocalID = nil
+									if self.lastTappedItemLocalID == item?.localID {
+										self.lastTappedItemLocalID = nil
 									}
 								}
 							}

ownCloud/Gallery/GalleryHostViewController.swift

@@ -0,0 +1,229 @@
+//
+//  AlternativePageViewController.swift
+//  ownCloud
+//
+//  Created by Pablo Carrascal on 14/02/2019.
+//  Copyright © 2019 ownCloud GmbH. All rights reserved.
+//
+
+import UIKit
+import ownCloudSDK
+
+class GalleryHostViewController: UIPageViewController {
+
+	typealias Filter = ([OCItem]) -> [OCItem]
+
+	// MARK: - Constants
+	let hasChangesAvailableKeyPath: String = "hasChangesAvailable"
+	let imageFilterRegexp: String = "\\A((image/(?!(gif|svg*))))"
+
+	// MARK: - Instance Variables
+	weak private var core: OCCore?
+	private var selectedItem: OCItem
+	private var items: [OCItem]?
+	private var query: OCQuery
+	private weak var viewControllerToTansition: DisplayViewController?
+	private var selectedFilter: Filter?
+
+	// MARK: - Filters
+	lazy var filterImageFiles: Filter = { items in
+		let filteredItems = items.filter({$0.type != .collection && $0.mimeType?.matches(regExp: self.imageFilterRegexp) ?? false})
+		return filteredItems
+	}
+
+	lazy var filterOneItem: Filter = { items in
+		let filteredItems = items.filter({$0.type != .collection && $0.fileID == self.selectedItem.fileID})
+		return filteredItems
+	}
+
+	// MARK: - Init & deinit
+	init(core: OCCore, selectedItem: OCItem, query: OCQuery) {
+		self.core = core
+		self.selectedItem = selectedItem
+		self.query = query
+
+		super.init(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
+		query.addObserver(self, forKeyPath: hasChangesAvailableKeyPath, options: [.initial, .new], context: nil)
+		Theme.shared.register(client: self)
+	}
+
+	required init?(coder: NSCoder) {
+		fatalError("init(coder:) has not been implemented")
+	}
+
+	deinit {
+		query.removeObserver(self, forKeyPath: hasChangesAvailableKeyPath)
+		Theme.shared.unregister(client: self)
+	}
+
+	// MARK: - ViewController lifecycle
+	override func viewDidLoad() {
+		super.viewDidLoad()
+		dataSource = self
+		delegate = self
+
+		if selectedItem.mimeType?.matches(regExp: imageFilterRegexp) ?? false {
+			selectedFilter = filterImageFiles
+		} else {
+			selectedFilter = filterOneItem
+		}
+
+		query.requestChangeSet(withFlags: .onlyResults) { [weak self] ( _, changeSet) in
+			guard let `self` = self else { return}
+			guard let queryResult = changeSet?.queryResult else { return }
+
+			self.items = self.selectedFilter?(queryResult)
+
+			if let items = self.items, let index = items.firstIndex(where: {$0.fileID == self.selectedItem.fileID}) {
+				let itemToDisplay = items[index]
+
+				guard let mimeType = itemToDisplay.mimeType else { return }
+				OnMainThread {
+					let viewController = self.selectDisplayViewControllerBasedOn(mimeType: mimeType)
+					let configuration = self.configurationFor(itemToDisplay, viewController: viewController)
+
+					viewController.configure(configuration)
+					self.addChild(viewController)
+					viewController.didMove(toParent: self)
+
+					self.setViewControllers([viewController], direction: .forward, animated: false, completion: nil)
+
+					viewController.present(item: itemToDisplay)
+					viewController.updateNavigationBarItems()
+				}
+			}
+		}
+	}
+
+	override var childForHomeIndicatorAutoHidden : UIViewController? {
+		if let childViewController = self.children.first {
+			return childViewController
+		}
+		return nil
+	}
+
+	// swiftlint:disable block_based_kvo
+	// Would love to use the block-based KVO, but it doesn't seem to work when used on the .state property of the query :-(
+	override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
+		if (object as? OCQuery) === query {
+			query.requestChangeSet(withFlags: .onlyResults) { ( _, changeSet) in
+				guard changeSet != nil else { return }
+				self.items = self.selectedFilter?(changeSet!.queryResult)
+			}
+		}
+	}
+	// swiftlint:enable block_based_kvo
+
+	// MARK: - Extension selection
+	private func selectDisplayViewControllerBasedOn(mimeType: String) -> (DisplayViewController) {
+
+		let locationIdentifier = OCExtensionLocationIdentifier(rawValue: mimeType)
+		let location: OCExtensionLocation = OCExtensionLocation(ofType: .viewer, identifier: locationIdentifier)
+		let context = OCExtensionContext(location: location, requirements: nil, preferences: nil)
+
+		var extensions: [OCExtensionMatch]?
+
+		do {
+			try extensions = OCExtensionManager.shared.provideExtensions(for: context)
+		} catch {
+			return DisplayViewController()
+		}
+
+		guard let matchedExtensions = extensions else {
+			return DisplayViewController()
+		}
+
+		guard matchedExtensions.count > 0 else {
+			return DisplayViewController()
+		}
+
+		let preferedExtension: OCExtension = matchedExtensions[0].extension
+
+		let extensionObject = preferedExtension.provideObject(for: context)
+
+		guard let controllerType = extensionObject as? (DisplayViewController & DisplayExtension) else {
+			return DisplayViewController()
+		}
+
+		return controllerType
+	}
+
+	// MARK: - Helper methods
+	private func viewControllerAtIndex(index: Int) -> UIViewController? {
+		guard let items = items else { return nil }
+
+		guard index >= 0, index < items.count else { return nil }
+
+		let item = items[index]
+
+		let newViewController = selectDisplayViewControllerBasedOn(mimeType: item.mimeType!)
+		let configuration = configurationFor(item, viewController: newViewController)
+
+		newViewController.configure(configuration)
+		newViewController.present(item: item)
+		return newViewController
+	}
+
+	private func configurationFor(_ item: OCItem, viewController: UIViewController) -> DisplayViewConfiguration {
+		let shouldDownload = viewController is (DisplayViewController & DisplayExtension) ? true : false
+		var configuration: DisplayViewConfiguration
+		if !shouldDownload {
+			configuration = DisplayViewConfiguration(item: item, core: core, state: .notSupportedMimeType)
+		} else {
+			configuration = DisplayViewConfiguration(item: item, core: core, state: .hasNetworkConnection)
+		}
+		return configuration
+	}
+}
+
+extension GalleryHostViewController: UIPageViewControllerDataSource {
+	func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
+		if let displayViewController = viewControllers?.first as? DisplayViewController,
+			let item = displayViewController.item,
+			let index = items?.firstIndex(where: {$0.fileID == item.fileID}) {
+			return viewControllerAtIndex(index: index + 1)
+		}
+
+		return nil
+
+	}
+
+	func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
+
+		if let displayViewController = viewControllers?.first as? DisplayViewController,
+			let item = displayViewController.item,
+			let index = items?.firstIndex(where: {$0.fileID == item.fileID}) {
+			return viewControllerAtIndex(index: index - 1)
+		}
+
+		return nil
+	}
+}
+
+extension GalleryHostViewController: UIPageViewControllerDelegate {
+	func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
+
+		let previousViewController = previousViewControllers[0]
+		previousViewController.didMove(toParent: nil)
+
+		if completed, let viewControllerToTransition = self.viewControllerToTansition {
+			if self.children.contains(viewControllerToTransition) == false {
+				self.addChild(viewControllerToTransition)
+			}
+			viewControllerToTransition.didMove(toParent: self)
+			viewControllerToTransition.updateNavigationBarItems()
+		}
+	}
+
+	func pageViewController(_ pageViewController: UIPageViewController, willTransitionTo pendingViewControllers: [UIViewController]) {
+		if let viewControllerToTransition = pendingViewControllers[0] as? DisplayViewController {
+			self.viewControllerToTansition = viewControllerToTransition
+		}
+	}
+}
+
+extension GalleryHostViewController: Themeable {
+	func applyThemeCollection(theme: Theme, collection: ThemeCollection, event: ThemeEvent) {
+		self.view.backgroundColor = collection.tableBackgroundColor
+	}
+}

ownCloud/UIKit Extensions/String+Extension.swift

@@ -28,4 +28,10 @@ extension String {
         let nonDigitsCharacterSet = CharacterSet.decimalDigits.inverted
         return !self.isEmpty && rangeOfCharacter(from: nonDigitsCharacterSet) == nil
     }
+
+	func matches (regExp: String) -> Bool {
+			guard let regex = try? NSRegularExpression(pattern: regExp) else { return false }
+			let range = NSRange(location: 0, length: self.count)
+			return regex.firstMatch(in: self, options: [], range: range) != nil
+	}
 }