preserve-inputs package, Spark._globalPreserves

packages/preserve-inputs/labeler.js

@@ -0,0 +1,38 @@
+PreserveInputs = {};
+
+PreserveInputs.idNameLabeler = function(n) {
+  var label = null;
+
+  if (n.nodeType === 1) {
+    if (n.id) {
+      label = '#' + n.id;
+    } else if (n.getAttribute("name")) {
+      label = n.getAttribute("name");
+      // Radio button special case:  radio buttons
+      // in a group all have the same name.  Their value
+      // determines their identity.
+      // Checkboxes with the same name and different
+      // values are also sometimes used in apps, so
+      // we treat them similarly.
+      if (n.nodeName === 'INPUT' &&
+          (n.type === 'radio' || n.type === 'checkbox') &&
+          n.value)
+        label = label + ':' + n.value;
+
+      // include parent names and IDs up to enclosing ID
+      // in the label
+      while (n.parentNode &&
+             n.parentNode.nodeType === 1) { // ELEMENT
+          n = n.parentNode;
+        if (n.id) {
+          label = '#' + n.id + "/" + label;
+          break;
+        } else if (n.getAttribute('name')) {
+          label = n.getAttribute('name') + "/" + label;
+        }
+      }
+    }
+  }
+
+  return label;
+};

packages/preserve-inputs/package.js

@@ -0,0 +1,12 @@
+Package.describe({
+  summary: "Preserve inputs and other form elements by ID"
+});
+
+Package.on_use(function (api, where) {
+  api.use(['underscore', 'spark', 'templating']);
+  api.add_files(["labeler.js", "preserve-inputs.js"], "client");
+});
+
+/*Package.on_test(function (api) {
+  api.add_files('labeler.js', 'client');
+});*/

packages/preserve-inputs/preserve-inputs.js

@@ -0,0 +1,9 @@
+
+(function () {
+  var inputTags = 'input textarea button select option'.split(' ');
+  var selector = _.map(inputTags, function (t) {
+    return t.replace(/^.*$/, '$&[id], $&[name]');
+  }).join(', ');
+
+  Spark._globalPreserves[selector] = PreserveInputs.idNameLabeler;
+})();

packages/spark/spark.js

@@ -60,6 +60,8 @@ Spark._ANNOTATION_LIST_ITEM = "item";
 // Set in tests to turn on extra UniversalEventListener sanity checks
 Spark._checkIECompliance = false;
 
+Spark._globalPreserves = {};
+
 var makeRange = function (type, start, end, inner) {
   var range = new LiveRange(Spark._TAG, start, end, inner);
   range.type = type;
@@ -575,6 +577,8 @@ Spark.renderToRange = function (range, htmlFunc) {
   while ((walk = findParentOfType(Spark._ANNOTATION_LANDMARK, walk)))
     pc.addRoot(walk.preserve, range, tempRange, walk.containerNode());
 
+  pc.addRoot(Spark._globalPreserves, range, tempRange);
+
   // compute preservations (must do this before destroying tempRange)
   var preservations = pc.computePreservations(range, tempRange);