iOS: implement tabs for spreadsheets

Change-Id: I210d68f013e56efd90da004891b872434ce65f68
Reviewed-on: https://gerrit.libreoffice.org/48368
Reviewed-by: jan iversen <jani@libreoffice.org>
Tested-by: jan iversen <jani@libreoffice.org>

6 files changed, 281 insertions, 5 deletions

diff --git a/ios/LibreOfficeLight/LibreOfficeLight.xcodeproj/project.pbxproj b/ios/LibreOfficeLight/LibreOfficeLight.xcodeproj/project.pbxproj
index 315d4d18151b..4897f40a1641 100644
--- a/ios/LibreOfficeLight/LibreOfficeLight.xcodeproj/project.pbxproj
+++ b/ios/LibreOfficeLight/LibreOfficeLight.xcodeproj/project.pbxproj
@@ -35,6 +35,8 @@
 		39EF4E2F1FA500C9001914AC /* PropertiesController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 39EF4E2E1FA500C9001914AC /* PropertiesController.swift */; };
 		FC31D01E2012F65500E7F402 /* DocumentHolder.swift in Sources */ = {isa = PBXBuildFile; fileRef = FC31D01D2012F65500E7F402 /* DocumentHolder.swift */; };
 		FC31D0202012F6D300E7F402 /* RenderCache.swift in Sources */ = {isa = PBXBuildFile; fileRef = FC31D01F2012F6D300E7F402 /* RenderCache.swift */; };
+		FC31D02B2013500E00E7F402 /* ButtonScrollView.swift in Sources */ = {isa = PBXBuildFile; fileRef = FC31D02A2013500E00E7F402 /* ButtonScrollView.swift */; };
+		FC31D02D2015DE1700E7F402 /* UIViewExtensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = FC31D02C2015DE1700E7F402 /* UIViewExtensions.swift */; };
 		FCAB1CB82009DB6900F1CC34 /* DocumentOverlaysView.swift in Sources */ = {isa = PBXBuildFile; fileRef = FCAB1CB72009DB6900F1CC34 /* DocumentOverlaysView.swift */; };
 		FCC2E3FA2004A01500CEB504 /* Document.swift in Sources */ = {isa = PBXBuildFile; fileRef = FCC2E3F62004A01400CEB504 /* Document.swift */; };
 		FCC2E3FC2004A01500CEB504 /* LibreOfficeKitWrapper.swift in Sources */ = {isa = PBXBuildFile; fileRef = FCC2E3F82004A01400CEB504 /* LibreOfficeKitWrapper.swift */; };
@@ -87,6 +89,8 @@
 		FC31D0132012EE4A00E7F402 /* LibreOfficeKitTypes.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = LibreOfficeKitTypes.h; sourceTree = "<group>"; };
 		FC31D01D2012F65500E7F402 /* DocumentHolder.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DocumentHolder.swift; sourceTree = "<group>"; };
 		FC31D01F2012F6D300E7F402 /* RenderCache.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RenderCache.swift; sourceTree = "<group>"; };
+		FC31D02A2013500E00E7F402 /* ButtonScrollView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ButtonScrollView.swift; sourceTree = "<group>"; };
+		FC31D02C2015DE1700E7F402 /* UIViewExtensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UIViewExtensions.swift; sourceTree = "<group>"; };
 		FCAB1CB72009DB6900F1CC34 /* DocumentOverlaysView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DocumentOverlaysView.swift; sourceTree = "<group>"; };
 		FCC2E3F62004A01400CEB504 /* Document.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Document.swift; sourceTree = "<group>"; };
 		FCC2E3F82004A01400CEB504 /* LibreOfficeKitWrapper.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = LibreOfficeKitWrapper.swift; sourceTree = "<group>"; };
@@ -172,11 +176,13 @@
 				39EE81531FA644E800B73AB8 /* Info.plist */,
 				39503A6F1F94C4AC00F19C78 /* lokit-Bridging-Header.h */,
 				397E08FD1E597BD8001374E0 /* AppDelegate.swift */,
+				FC31D02A2013500E00E7F402 /* ButtonScrollView.swift */,
 				3992D8591E5B762A00BEA987 /* DocumentController.swift */,
 				FCAB1CB72009DB6900F1CC34 /* DocumentOverlaysView.swift */,
 				FCC2E3FE2004B59B00CEB504 /* DocumentTiledView.swift */,
 				39284DB21FA5F207006F43E4 /* DocumentActions.swift */,
 				39EF4E2E1FA500C9001914AC /* PropertiesController.swift */,
+				FC31D02C2015DE1700E7F402 /* UIViewExtensions.swift */,
 				392ED9B21E5E4B03005C8435 /* ViewPrintManager.swift */,
 				399648461E5B87DC00E73E83 /* ViewProperties.swift */,
 				397E09011E597BD8001374E0 /* Main.storyboard */,
@@ -341,8 +347,10 @@
 				3992D85A1E5B762A00BEA987 /* DocumentController.swift in Sources */,
 				FCC2E3FD2004A01500CEB504 /* LOKitThread.swift in Sources */,
 				397E08FE1E597BD8001374E0 /* AppDelegate.swift in Sources */,
+				FC31D02B2013500E00E7F402 /* ButtonScrollView.swift in Sources */,
 				FCC2E3FA2004A01500CEB504 /* Document.swift in Sources */,
 				FCC2E3FF2004B59B00CEB504 /* DocumentTiledView.swift in Sources */,
+				FC31D02D2015DE1700E7F402 /* UIViewExtensions.swift in Sources */,
 				FCC2E4052004B74000CEB504 /* AsyncUtil.swift in Sources */,
 				39EF4E2F1FA500C9001914AC /* PropertiesController.swift in Sources */,
 			);
diff --git a/ios/LibreOfficeLight/LibreOfficeLight/ButtonScrollView.swift b/ios/LibreOfficeLight/LibreOfficeLight/ButtonScrollView.swift
new file mode 100644
index 000000000000..279ad22123b6
--- /dev/null
+++ b/ios/LibreOfficeLight/LibreOfficeLight/ButtonScrollView.swift
@@ -0,0 +1,145 @@
+//
+// This file is part of the LibreOffice project.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+//
+import UIKit
+
+/// Scrollable list of buttons.
+/// Kind of like a tab bar, but doesn't maintain or switch between views, just calls back on click
+open class ButtonScrollView: UIScrollView
+{
+    var buttonList: ButtonList? = nil
+
+    var buttonClickedCallback: ( (Int) -> () )? = nil
+
+    var selectedIndex: Int?
+    {
+        get {
+            return buttonList?.selectedIndex
+        }
+        set {
+            buttonList?.selectedIndex = selectedIndex
+        }
+    }
+
+    public override init(frame: CGRect)
+    {
+        super.init(frame: frame)
+    }
+
+    public required init?(coder aDecoder: NSCoder)
+    {
+        super.init(coder: aDecoder)
+    }
+
+    public func setButtonLabels(labels: [String])
+    {
+        if let bl = buttonList
+        {
+            bl.removeFromSuperview()
+        }
+        let bl = ButtonList(frame: CGRect(x:0, y:0, width: self.frame.width, height:44),
+                                labels: labels,
+                                owner: self)
+        self.addSubview(bl)
+        self.contentSize = bl.frame.size
+        self.buttonList = bl
+    }
+}
+
+/// Horizontally layed out buttons, living within the owned scroll view
+open class ButtonList: UIView
+{
+    let labels: [String]
+    let gap: CGFloat = 10.0
+    let topGap: CGFloat = 8
+    weak var owner: ButtonScrollView? = nil
+
+    var buttonBackground = UIColor(white: 0.6, alpha: 1)
+    var selectedButtonBackground = UIColor.white
+
+    var selectedIndex: Int? = 0
+    {
+        didSet {
+            runOnMain {
+                self.highlightSelectedIndex()
+            }
+        }
+    }
+
+    public init(frame: CGRect, labels: [String], owner: ButtonScrollView)
+    {
+        self.labels = labels
+        self.owner = owner
+        super.init(frame: frame)
+        self.backgroundColor = UIColor(white: 0.9, alpha: 1)
+
+        var idx = 0
+        for label in labels
+        {
+            let b = UIButton(type: .custom)
+            b.setTitle(label, for: .normal)
+            b.backgroundColor = buttonBackground
+            b.contentEdgeInsets = UIEdgeInsets(top: 4, left: 4, bottom: 4, right: 4)
+            b.layer.cornerRadius = 4
+            b.tag = idx
+            b.addTarget(self, action: #selector(buttonTapped), for: UIControlEvents.touchUpInside)
+            self.addSubview(b)
+            idx += 1
+        }
+        self.layoutSubviews()
+    }
+
+    @objc func buttonTapped(sender: UIButton, forEvent event: UIEvent)
+    {
+        let idx = sender.tag
+        owner?.buttonClickedCallback?(idx)
+        self.selectedIndex = idx
+    }
+
+    public required init?(coder aDecoder: NSCoder)
+    {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    public var buttons: [UIButton]
+    {
+        return self.subviews.flatMap({ $0 as? UIButton })
+    }
+
+    open override func layoutSubviews()
+    {
+
+        var x: CGFloat = gap
+        for button in buttons
+        {
+            button.sizeToFit()
+            let s = button.frame.size
+            button.frame = CGRect(x: x, y: topGap, width: s.width, height: s.height)
+            x = x + (s.width + gap)
+        }
+        highlightSelectedIndex()
+        self.frame = CGRect(x:0, y: 0, width: x, height: self.frame.height)
+    }
+
+    open func highlightSelectedIndex()
+    {
+        for (index, button) in buttons.enumerated()
+        {
+            if (index == selectedIndex)
+            {
+                button.backgroundColor = selectedButtonBackground
+                button.setTitleColor(.black, for: .normal)
+            }
+            else
+            {
+                button.backgroundColor = buttonBackground
+                button.setTitleColor(.white, for: .normal)
+            }
+
+        }
+    }
+}
diff --git a/ios/LibreOfficeLight/LibreOfficeLight/DocumentController.swift b/ios/LibreOfficeLight/LibreOfficeLight/DocumentController.swift
index 3decec85410a..88c3ccdcd67e 100755
--- a/ios/LibreOfficeLight/LibreOfficeLight/DocumentController.swift
+++ b/ios/LibreOfficeLight/LibreOfficeLight/DocumentController.swift
@@ -26,10 +26,13 @@ class DocumentController: UIViewController, MenuDelegate, UIDocumentBrowserViewC
     // holds known document types
     var KnownDocumentTypes : [String] = []
 
+    var zeroInsets: UIEdgeInsets = .zero
+
     @IBOutlet weak var scrollView: UIScrollView!
     @IBOutlet weak var mask: UIView!
     @IBOutlet weak var progressBar: UIProgressView!
     @IBOutlet weak var searchBar: UISearchBar!
+    @IBOutlet weak var buttonScrollView: ButtonScrollView!
 
     deinit
     {
@@ -61,10 +64,12 @@ class DocumentController: UIViewController, MenuDelegate, UIDocumentBrowserViewC
     override func viewDidAppear(_ animated: Bool)
     {
         super.viewDidAppear(animated)
-        //let res = Bundle.main.url(forResource: "example", withExtension: "odt")
-        //let res = Bundle.main.url(forResource: "example2", withExtension: "docx")
 
-        let res = Bundle.main.url(forResource: "testdata/1", withExtension: "pptx")
+        // Always load the 'welcome' file, as per the android app
+        let res = Bundle.main.url(forResource: "example", withExtension: "odt")
+
+        // uncomment for test data in resources until the doc picker works properly
+        //let res = Bundle.main.url(forResource: "testdata/2", withExtension: "xlsx")
 
         if let exampleDoc = res
         {
@@ -416,6 +421,30 @@ class DocumentController: UIViewController, MenuDelegate, UIDocumentBrowserViewC
         docView.addSubview(overlay)
         self.documentOverlaysView = overlay
 
+        // button view - used for spreadsheet tabs
+        if doc.isSpeadsheet
+        {
+            buttonScrollView.isHidden = false
+            buttonScrollView.setButtonLabels(labels: doc.partNames)
+            buttonScrollView.buttonClickedCallback = {
+                [weak self] index in
+                self?.document?.async {
+                    $0.setPart(nPart: Int32(index))
+                    runOnMain {
+                        self?.documentView?.setNeedsDisplay()
+                    }
+                }
+            }
+            // make room for the scroll view
+            zeroInsets = UIEdgeInsets(top: 0, left: 0, bottom: buttonScrollView.height, right: 0)
+        }
+        else
+        {
+            zeroInsets = .zero
+            buttonScrollView.isHidden = true
+        }
+        scrollView.contentInset = zeroInsets
+
         // debugging view borders
         /*
         self.scrollView.layer.borderColor = UIColor.red.cgColor
@@ -563,7 +592,7 @@ extension DocumentController
     @objc func keyboardWillHide(notification: NSNotification)
     {
         print("keyboardWillHide")
-        scrollView.contentInset = .zero
-        scrollView.scrollIndicatorInsets = .zero
+        scrollView.contentInset = zeroInsets
+        scrollView.scrollIndicatorInsets = zeroInsets
     }
 }
diff --git a/ios/LibreOfficeLight/LibreOfficeLight/LOKit/DocumentHolder.swift b/ios/LibreOfficeLight/LibreOfficeLight/LOKit/DocumentHolder.swift
index a380cc45edd0..c0760b8614a4 100644
--- a/ios/LibreOfficeLight/LibreOfficeLight/LOKit/DocumentHolder.swift
+++ b/ios/LibreOfficeLight/LibreOfficeLight/LOKit/DocumentHolder.swift
@@ -26,17 +26,31 @@ public class DocumentHolder
     public let documentSize: CGSize
     public let views: Int32
     public let parts: Int32
+    public let partNames: [String]
 
     public private(set) var currentPart: Int32 = 0
 
     init(doc: Document)
     {
         self.doc = doc
+
+        // we go and get a bunch of document properties and store them in properties
+        // this allows easy access to these without threading issues
+        // when we get to editing they will have to be invalidated
+
         self.documentType = doc.getDocumentType()
         documentSize = doc.getDocumentSizeAsCGSize()
         views = doc.getViewsCount()
         parts = doc.getParts()
 
+        var partNames = [String]()
+        for i in 0..<parts
+        {
+            let n = doc.getPartName(nPart: i) ?? ""
+            partNames.append(n)
+        }
+        self.partNames = partNames
+
         doc.registerCallback() {
             [weak self] typ, payload in
             self?.onDocumentEvent(type: typ, payload: payload)
diff --git a/ios/LibreOfficeLight/LibreOfficeLight/UIViewExtensions.swift b/ios/LibreOfficeLight/LibreOfficeLight/UIViewExtensions.swift
new file mode 100644
index 000000000000..1c0322331e51
--- /dev/null
+++ b/ios/LibreOfficeLight/LibreOfficeLight/UIViewExtensions.swift
@@ -0,0 +1,74 @@
+//
+// This file is part of the LibreOffice project.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+//
+
+import UIKit
+
+public extension UIView
+{
+    public var height: CGFloat
+    {
+        get
+        {
+            return frame.size.height
+        }
+        set
+        {
+            frame.size.height = newValue
+        }
+    }
+
+    public var size: CGSize
+    {
+        get
+        {
+            return frame.size
+        }
+        set
+        {
+            width = newValue.width
+            height = newValue.height
+        }
+    }
+
+    public var width: CGFloat
+    {
+        get
+        {
+            return frame.size.width
+        }
+        set
+        {
+            frame.size.width = newValue
+        }
+    }
+
+    public var x: CGFloat
+    {
+        get
+        {
+            return frame.origin.x
+        }
+        set
+        {
+            frame.origin.x = newValue
+        }
+    }
+
+
+    public var y: CGFloat
+    {
+        get
+        {
+            return frame.origin.y
+        }
+        set
+        {
+            frame.origin.y = newValue
+        }
+    }
+}
diff --git a/ios/LibreOfficeLight/LibreOfficeLight/en.lproj/Main.storyboard b/ios/LibreOfficeLight/LibreOfficeLight/en.lproj/Main.storyboard
index ccc91115c5e0..ffd5059d06a9 100755
--- a/ios/LibreOfficeLight/LibreOfficeLight/en.lproj/Main.storyboard
+++ b/ios/LibreOfficeLight/LibreOfficeLight/en.lproj/Main.storyboard
@@ -30,6 +30,11 @@
                                     <outlet property="delegate" destination="vXZ-lx-hvc" id="mWv-AB-k2W"/>
                                 </connections>
                             </scrollView>
+                            <view contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="8HF-MM-fd0" userLabel="ButtonBar" customClass="ButtonScrollView" customModule="LibreOfficeLight" customModuleProvider="target">
+                                <rect key="frame" x="0.0" y="980" width="768" height="44"/>
+                                <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES"/>
+                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                            </view>
                             <view opaque="NO" userInteractionEnabled="NO" alpha="0.5" contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="URZ-zU-xtO" userLabel="Mask">
                                 <rect key="frame" x="0.0" y="64" width="768" height="960"/>
                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
@@ -76,6 +81,7 @@
                     </navigationItem>
                     <simulatedToolbarMetrics key="simulatedBottomBarMetrics"/>
                     <connections>
+                        <outlet property="buttonScrollView" destination="8HF-MM-fd0" id="Mlq-CV-p8N"/>
                         <outlet property="mask" destination="URZ-zU-xtO" id="pkw-v3-0gr"/>
                         <outlet property="progressBar" destination="hRJ-mR-Vnv" id="4lJ-kG-9SW"/>
                         <outlet property="scrollView" destination="cJ7-wO-9D1" id="U50-LO-plb"/>