Show context menu on image right-click

src/js/lightbox.js

@@ -99,6 +99,7 @@
     this.$overlay        = $('#lightboxOverlay');
     this.$outerContainer = this.$lightbox.find('.lb-outerContainer');
     this.$container      = this.$lightbox.find('.lb-container');
+    this.$nav            = this.$lightbox.find('.lb-nav')
 
     // Store css values for future lookup
     this.containerTopPadding = parseInt(this.$container.css('padding-top'), 10);
@@ -144,6 +145,32 @@
       return false;
     });
 
+    /*
+      Show context menu for image on right-click
+
+      There is a div containing the navigation that spans the entire image and lives above of it. If
+      you right-click, you are right clicking this div and not the image. This prevents users from
+      saving the image or using other context menu actions with the image.
+
+      To fix this, when we detect the right mouse button is pressed down, but not yet clicked, we
+      set pointer-events to none on the nav div. This is so that the upcoming right-click event on
+      the next mouseup will bubble down to the image. Once the right-click/contextmenu event occurs
+      we set the pointer events back to auto for the nav div so it can capture hover and left-click
+      events as usual.
+     */
+    this.$nav.on('mousedown', function(event) {
+      if (event.which === 3) {
+        self.$nav.css('pointer-events', 'none');
+
+        self.$lightbox.on('contextmenu', function() {
+          setTimeout(function() {
+              this.$nav.css('pointer-events', 'auto');
+          }.bind(self), 0)
+        });
+      }
+    })
+
+
     this.$lightbox.find('.lb-loader, .lb-close').on('click', function() {
       self.end();
       return false;