First pass at a Hanging Protocol implementation and editor (LT-131)

Packages/viewerbase/lib/setMammogramViewportAlignment.js

@@ -0,0 +1,61 @@
+setMammogramViewportAlignment = function(series, enabledElement, imageId) {
+    // Don't apply the MG viewport alignment to other series types
+    var viewTypes = ['MLO', 'CC', 'LM', 'ML', 'XCCL'];
+    var requiresInversion = ['LM']; // Tomo series are flipped
+
+    var instance = cornerstoneTools.metaData.get('instance', imageId);
+    if (!instance) {
+        return;
+    }
+
+    var laterality = instance.laterality;
+    var element = enabledElement.element;
+    var position;
+
+    var left = $(enabledElement.canvas).offset().left;
+    var right = left + enabledElement.canvas.width;
+
+    if (viewTypes.indexOf(instance.viewPosition) < 0) {
+        return;
+    }
+
+    // Check if we should flip the laterality
+    if (requiresInversion.indexOf(instance.viewPosition) > -1) {
+        if (laterality === "R") {
+            laterality = "L";
+        } else if (laterality === "L") {
+            laterality = "R";
+        }
+    }
+
+    if (laterality === "R") {
+        // Set X translation to Canvas max in image pixels - image width
+        // This places it on the right side of the screen
+        position = cornerstone.pageToPixel(element, right, 0);
+        if (position.x !== enabledElement.image.width) {
+            enabledElement.viewport.translation.x += position.x - enabledElement.image.width;
+        }
+
+        addSpecificMetadata(imageId, 'tagDisplay', {
+            side: 'L'
+        });
+
+    } else if (laterality === 'L') {
+        // Use pageToPixel to and jQuery to find pixel coordinates of leftmost
+        // side of the current canvas
+        position = cornerstone.pageToPixel(element, left, 0);
+        if (position.x !== 0) {
+            enabledElement.viewport.translation.x += position.x;
+        }
+
+        addSpecificMetadata(imageId, 'tagDisplay', {
+            side: 'R'
+        });
+    }
+
+    return enabledElement.viewport;
+};
+
+Meteor.startup(function() {
+    setInstanceClassDefaultViewportFunction("1.2.840.10008.5.1.4.1.1.1.2", setMammogramViewportAlignment);
+});