LT-332: Fixed tool color and shadow for target tool. Moved client-only utilities to client-folder in viewerbase to speed up reloading

Packages/ohif-viewerbase/client/lib/enablePrefetchOnElement.js

@@ -0,0 +1,25 @@
+import { OHIF } from 'meteor/ohif:core';
+
+/**
+ * This function enables stack prefetching for a specified element (viewport)
+ * It first disables any prefetching currently occurring on any other viewports.
+ *
+ * @param element {node} DOM Node representing the viewport element
+ */
+enablePrefetchOnElement = function(element) {
+    OHIF.log.info("imageViewerViewport enablePrefetchOnElement");
+
+    // Loop through all viewports and disable stackPrefetch
+    $('.imageViewerViewport').each(function() {
+        if (!$(this).find('canvas').length) {
+            return;
+        }
+        cornerstoneTools.stackPrefetch.disable(this);
+    });
+
+    // Make sure there is a stack to fetch
+    const stack = cornerstoneTools.getToolState(element, 'stack');
+    if (stack && stack.data.length && stack.data[0].imageIds.length > 1) {
+        cornerstoneTools.stackPrefetch.enable(element);
+    }
+};