Add a toolbar above the on-screen keyboard with extra keys that are missing from iOS keyboard (#576)

* Add required images to assets

* Add toolbar above keyboard with more key options

* Fix tvOS errors

Limelight/Images.xcassets/AltIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "AltIcon.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Limelight/Images.xcassets/Contents.json

@@ -1,6 +1,6 @@
 {
   "info" : {
-    "version" : 1,
-    "author" : "xcode"
+    "author" : "xcode",
+    "version" : 1
   }
-}
+}

Limelight/Images.xcassets/ControlIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "ControlIcon.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Limelight/Images.xcassets/DeleteIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "DeleteIcon.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Limelight/Images.xcassets/DoneIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "doneIcon.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Limelight/Images.xcassets/EscapeIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "EscapeIcon.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Limelight/Images.xcassets/ShiftIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "ShiftIcon.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Limelight/Images.xcassets/TabIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "TabIcon.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Limelight/Images.xcassets/WindowsIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "WindowsIcon.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Limelight/Input/StreamView.m

@@ -352,6 +352,23 @@ static const double X1_MOUSE_SPEED_DIVISOR = 2.5;
                 // Prepare the textbox used to capture keyboard events.
                 keyInputField.delegate = self;
                 keyInputField.text = @"0";
+#if !TARGET_OS_TV
+                // Prepare the toolbar above the keyboard for more options
+                UIToolbar *customToolbarView = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width, 44)];
+                
+                UIBarButtonItem *doneBarButton = [self createButtonWithImageNamed:@"DoneIcon.png" backgroundColor:[UIColor clearColor] target:self action:@selector(toolbarButtonClicked:) keyCode:@"0x00" isToggleable:NO];
+                UIBarButtonItem *windowsBarButton = [self createButtonWithImageNamed:@"WindowsIcon.png" backgroundColor:[UIColor blackColor] target:self action:@selector(toolbarButtonClicked:) keyCode:@"0x5B" isToggleable:YES];
+                UIBarButtonItem *tabBarButton = [self createButtonWithImageNamed:@"TabIcon.png" backgroundColor:[UIColor blackColor] target:self action:@selector(toolbarButtonClicked:) keyCode:@"0x09" isToggleable:NO];
+                UIBarButtonItem *shiftBarButton = [self createButtonWithImageNamed:@"ShiftIcon.png" backgroundColor:[UIColor blackColor] target:self action:@selector(toolbarButtonClicked:) keyCode:@"0xA0" isToggleable:YES];
+                UIBarButtonItem *escapeBarButton = [self createButtonWithImageNamed:@"EscapeIcon.png" backgroundColor:[UIColor blackColor] target:self action:@selector(toolbarButtonClicked:) keyCode:@"0x1B" isToggleable:NO];
+                UIBarButtonItem *controlBarButton = [self createButtonWithImageNamed:@"ControlIcon.png" backgroundColor:[UIColor blackColor] target:self action:@selector(toolbarButtonClicked:) keyCode:@"0xA2" isToggleable:YES];
+                UIBarButtonItem *altBarButton = [self createButtonWithImageNamed:@"AltIcon.png" backgroundColor:[UIColor blackColor] target:self action:@selector(toolbarButtonClicked:) keyCode:@"0xA4" isToggleable:YES];
+                UIBarButtonItem *deleteBarButton = [self createButtonWithImageNamed:@"DeleteIcon.png" backgroundColor:[UIColor blackColor] target:self action:@selector(toolbarButtonClicked:) keyCode:@"0x2E" isToggleable:NO];
+                UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
+                
+                [customToolbarView setItems:[NSArray arrayWithObjects:doneBarButton, windowsBarButton, escapeBarButton, tabBarButton, shiftBarButton, controlBarButton, altBarButton, deleteBarButton, flexibleSpace, nil]];
+                keyInputField.inputAccessoryView = customToolbarView;
+#endif
                 [keyInputField becomeFirstResponder];
                 [keyInputField addTarget:self action:@selector(onKeyboardPressed:) forControlEvents:UIControlEventEditingChanged];
                 
@@ -364,6 +381,63 @@ static const double X1_MOUSE_SPEED_DIVISOR = 2.5;
     }
 }
 
+- (UIBarButtonItem *)createButtonWithImageNamed:(NSString *)imageName backgroundColor:(UIColor *)backgroundColor target:(id)target action:(SEL)action keyCode:(NSString *)keyCode isToggleable:(BOOL)isToggleable {
+    UIImage *image = [UIImage imageNamed:imageName];
+    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
+    [button setImage:image forState:UIControlStateNormal];
+    button.frame = CGRectMake(0, 0, 30, 30);
+    button.imageView.contentMode = UIViewContentModeScaleAspectFit;
+    button.imageView.backgroundColor = backgroundColor;
+    button.imageView.layer.cornerRadius = 10.0;
+    button.imageEdgeInsets = UIEdgeInsetsMake(6, 6, 6, 6);
+    [button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
+    objc_setAssociatedObject(button, "keyCode", keyCode, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    objc_setAssociatedObject(button, "isToggleable", @(isToggleable), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    objc_setAssociatedObject(button, "isOn", @(NO), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithCustomView:button];
+    return barButton;
+}
+
+- (void)toolbarButtonClicked:(UIButton *)sender {
+    BOOL isToggleable = [objc_getAssociatedObject(sender, "isToggleable") boolValue];
+    BOOL isOn = [objc_getAssociatedObject(sender, "isOn") boolValue];
+    if (isToggleable){
+        isOn = !isOn;
+        // Update the button's appearance based on its new state
+        if (isOn) {
+            sender.imageView.backgroundColor = [UIColor lightGrayColor];
+        } else {
+            sender.imageView.backgroundColor = [UIColor blackColor];
+        }
+    }
+    // Update the new on/off state of the button
+    objc_setAssociatedObject(sender, "isOn", @(isOn), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    // Get the keyCode parameter and convert to short for key press event
+    NSString *keyCodeString = objc_getAssociatedObject(sender, "keyCode");
+    unsigned int keyCodeInteger = 0;
+    NSScanner *scanner = [NSScanner scannerWithString:keyCodeString];
+    [scanner scanHexInt:&keyCodeInteger];
+    short keyCodeShort = (short)keyCodeInteger;
+    // Close keyboard if done button clicked
+    if ([keyCodeString isEqual: @"0x00"]){
+        [[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil];
+    } else {
+        // Send key press event using keyCode parameter, toggle if necessary
+        // FOR SOME REASON CTRL-ALT-DELETE DOESN'T WORK???
+        if (isToggleable){
+            if (isOn){
+                LiSendKeyboardEvent(keyCodeShort, KEY_ACTION_DOWN, 0);
+            } else {
+                LiSendKeyboardEvent(keyCodeShort, KEY_ACTION_UP, 0);
+            }
+        } else {
+            LiSendKeyboardEvent(keyCodeShort, KEY_ACTION_DOWN, 0);
+            usleep(50 * 1000);
+            LiSendKeyboardEvent(keyCodeShort, KEY_ACTION_UP, 0);
+        }
+    }
+}
+
 - (BOOL)handleMouseButtonEvent:(int)buttonAction forTouches:(NSSet *)touches withEvent:(UIEvent *)event {
 #if !TARGET_OS_TV
     if (@available(iOS 13.4, *)) {