Merge pull request #121 from graphman65/master

Add option to disable text selection prevention

Author: anvaka

index.d.ts

@@ -22,6 +22,7 @@ declare module "panzoom" {
     onDoubleClick?: (e: Event) => void;
     smoothScroll?: boolean;
     controller?: SVGElement | HTMLElement;
+    enableTextSelection?: boolean;
   }
 
   export interface PanZoom {

index.js

@@ -661,9 +661,10 @@ function createPanZoom(domElement, options) {
     // window, and we will loose it
     document.addEventListener('mousemove', onMouseMove)
     document.addEventListener('mouseup', onMouseUp)
-
-    preventTextSelection.capture(e.target || e.srcElement)
-
+    
+    if (!options.enableTextSelection) {
+      preventTextSelection.capture(e.target || e.srcElement)
+    }
     return false
   }
 
@@ -685,7 +686,9 @@ function createPanZoom(domElement, options) {
   }
 
   function onMouseUp() {
-    preventTextSelection.release()
+    if (!options.enableTextSelection) {
+      preventTextSelection.release()
+    }
     triggerPanEnd()
     releaseDocumentMouse()
   }