link map is kept centered on the active note box

libraries/panzoom.js

@@ -115,12 +115,16 @@ function createPanZoom(domElement, options) {
     zoomTo: publicZoomTo,
     zoomAbs: zoomAbs,
     smoothZoom: smoothZoom,
-    getTransform: getTransformModel,
     showRectangle: showRectangle,
 
     pause: pause,
     resume: resume,
     isPaused: isPaused,
+
+    getTransform: getTransformModel,
+    getMinZoom: getMinZoom,
+    getMaxZoom: getMaxZoom,
+    getOwner: () => owner
   }
 
   eventify(api);
@@ -216,6 +220,14 @@ function createPanZoom(domElement, options) {
     return transform
   }
 
+  function getMinZoom() {
+    return minZoom;
+  }
+
+  function getMaxZoom() {
+    return maxZoom;
+  }
+
   function getPoint() {
     return {
       x: transform.x,
@@ -345,8 +357,14 @@ function createPanZoom(domElement, options) {
     transform.x = size.x - ratio * (size.x - transform.x)
     transform.y = size.y - ratio * (size.y - transform.y)
 
-    var transformAdjusted = keepTransformInsideBounds()
-    if (!transformAdjusted) transform.scale *= ratio
+    // TODO: https://github.com/anvaka/panzoom/issues/112
+    if (bounds && boundsPadding === 1 && minZoom === 1) {
+      transform.scale *= ratio
+      keepTransformInsideBounds()
+    } else {
+      var transformAdjusted = keepTransformInsideBounds()
+      if (!transformAdjusted) transform.scale *= ratio
+    }
 
     triggerEvent('zoom')
 
@@ -1308,7 +1326,7 @@ function makeAggregateRaf() {
 
     var t = backBuffer;
     backBuffer = frontBuffer;
-    frontBuffer = t;
+    frontBuffer = t;
 
     frontBuffer.forEach(function(callback) {
       callback();
@@ -1571,7 +1589,7 @@ function removeWheelListener( elem, callback, useCapture ) {
   // unsubscription in some browsers. But in practice, I don't think we should
   // worry too much about it (those browsers are on the way out)
 function _addWheelListener( elem, eventName, callback, useCapture ) {
-  elem[ _addEventListener ]( prefix + eventName, support == "wheel" ? callback : function(originalEvent ) {
+  elem[ _addEventListener ]( prefix + eventName, support == "wheel" ? callback : function( originalEvent ) {
     !originalEvent && ( originalEvent = window.event );
 
     // create a normalized event object
@@ -1613,10 +1631,7 @@ function _addWheelListener( elem, eventName, callback, useCapture ) {
     // it's time to fire the callback
     return callback( event );
 
-  }, {
-    capture: useCapture || false ,
-    passive: false
-  });
+  }, useCapture || false );
 }
 
 function _removeWheelListener( elem, eventName, callback, useCapture ) {