change(web): titlebar configEnabled, helpEnabled

web/source/osk/layouts/targetedFloatLayout.ts

@@ -161,7 +161,7 @@ namespace com.keyman.osk.layouts {
 
           let newWidth  = this.startWidth  + cumulativeX;
           let newHeight = this.startHeight + cumulativeY;
-          
+
           // Set the smallest and largest OSK size
           if(newWidth < 0.2*screen.width) {
             newWidth = 0.2*screen.width;

web/source/osk/layouts/titleBar.ts

@@ -10,11 +10,37 @@ namespace com.keyman.osk.layouts {
     private _configButton: HTMLDivElement;
     private _caption: HTMLSpanElement;
 
+    private _helpEnabled:   boolean;
+    private _configEnabled: boolean;
+
+    public get helpEnabled(): boolean {
+      return this._helpEnabled;
+    }
+
+    public set helpEnabled(val) {
+      this._helpEnabled = val;
+
+      this._helpButton.style.visibility = val ? 'visible' : 'hidden';
+    }
+
+    public get configEnabled(): boolean {
+      return this._configEnabled;
+    }
+
+    public set configEnabled(val) {
+      this._configEnabled = val;
+
+      this._configButton.style.visibility = val ? 'visible' : 'hidden';
+    }
+
     private static readonly DISPLAY_HEIGHT = ParsedLengthStyle.inPixels(20); // As set in kmwosk.css
 
     public constructor(dragHandler?: MouseDragOperation) {
       this._element = this.buildTitleBar();
 
+      this.helpEnabled   = false;
+      this.configEnabled = false;
+
       if(dragHandler) {
         this.element.onmousedown = dragHandler.mouseDownHandler;
       }

web/source/osk/oskView.ts

@@ -1078,6 +1078,20 @@ namespace com.keyman.osk {
      * Description  Wrapper function to add and identify OSK-specific event handlers
      */
     ['addEventListener'](event: string, func: (obj) => boolean) {
+      // As the following title bar buttons (for desktop / FloatingOSKView) do nothing unless
+      // a site designer uses these events, we disable / hide them until an event is attached.
+      let titleBar = this.headerView;
+      if(titleBar && titleBar instanceof layouts.TitleBar) {
+        switch(event) {
+          case 'configclick':
+            titleBar.configEnabled = true;
+            break;
+          case 'helpclick':
+            titleBar.helpEnabled = true;
+            break;
+        }
+      }
+
       return com.keyman.singleton.util.addEventListener('osk.'+event, func);
     }
   }