Set field.sourceBlock in headless Blockly.

core/field.js

@@ -118,15 +118,22 @@ Blockly.Field.NBSP = '\u00A0';
 Blockly.Field.prototype.EDITABLE = true;
 
 /**
- * Install this field on a block.
+ * Attach this field to a block.
  * @param {!Blockly.Block} block The block containing this field.
  */
-Blockly.Field.prototype.init = function(block) {
-  if (this.sourceBlock_) {
+Blockly.Field.prototype.setSourceBlock = function(block) {
+  goog.asserts.assert(!this.sourceBlock_, 'Field already bound to a block.');
+  this.sourceBlock_ = block;
+};
+
+/**
+ * Install this field on a block.
+ */
+Blockly.Field.prototype.init = function() {
+  if (this.fieldGroup_) {
     // Field has already been initialized once.
     return;
   }
-  this.sourceBlock_ = block;
   // Build the DOM.
   this.fieldGroup_ = Blockly.createSvgElement('g', {}, null);
   if (!this.visible_) {
@@ -144,7 +151,7 @@ Blockly.Field.prototype.init = function(block) {
       this.fieldGroup_);
 
   this.updateEditable();
-  block.getSvgRoot().appendChild(this.fieldGroup_);
+  this.sourceBlock_.getSvgRoot().appendChild(this.fieldGroup_);
   this.mouseUpWrapper_ =
       Blockly.bindEvent_(this.fieldGroup_, 'mouseup', this, this.onMouseUp_);
   // Force a render.

core/field_checkbox.js

@@ -61,7 +61,7 @@ Blockly.FieldCheckbox.prototype.CURSOR = 'default';
  * @param {!Blockly.Block} block The block containing this text.
  */
 Blockly.FieldCheckbox.prototype.init = function(block) {
-  if (this.sourceBlock_) {
+  if (this.fieldGroup_) {
     // Checkbox has already been initialized once.
     return;
   }

core/field_dropdown.js

@@ -80,11 +80,10 @@ Blockly.FieldDropdown.prototype.CURSOR = 'default';
  * @param {!Blockly.Block} block The block containing this text.
  */
 Blockly.FieldDropdown.prototype.init = function(block) {
-  if (this.sourceBlock_) {
+  if (this.fieldGroup_) {
     // Dropdown has already been initialized once.
     return;
   }
-
   // Add dropdown arrow: "option ▾" (LTR) or "▾ אופציה" (RTL)
   this.arrow_ = Blockly.createSvgElement('tspan', {}, null);
   this.arrow_.appendChild(document.createTextNode(

core/field_image.js

@@ -67,14 +67,12 @@ Blockly.FieldImage.prototype.EDITABLE = false;
 
 /**
  * Install this image on a block.
- * @param {!Blockly.Block} block The block containing this text.
  */
-Blockly.FieldImage.prototype.init = function(block) {
-  if (this.sourceBlock_) {
+Blockly.FieldImage.prototype.init = function() {
+  if (this.fieldGroup_) {
     // Image has already been initialized once.
     return;
   }
-  this.sourceBlock_ = block;
   // Build the DOM.
   /** @type {SVGElement} */
   this.fieldGroup_ = Blockly.createSvgElement('g', {}, null);
@@ -97,7 +95,7 @@ Blockly.FieldImage.prototype.init = function(block) {
          'width': this.width_ + 'px',
          'fill-opacity': 0}, this.fieldGroup_);
   }
-  block.getSvgRoot().appendChild(this.fieldGroup_);
+  this.sourceBlock_.getSvgRoot().appendChild(this.fieldGroup_);
 
   // Configure the field to be transparent with respect to tooltips.
   var topElement = this.rectElement_ || this.imageElement_;

core/field_label.js

@@ -53,15 +53,12 @@ Blockly.FieldLabel.prototype.EDITABLE = false;
 
 /**
  * Install this text on a block.
- * @param {!Blockly.Block} block The block containing this text.
  */
-Blockly.FieldLabel.prototype.init = function(block) {
-  if (this.sourceBlock_) {
+Blockly.FieldLabel.prototype.init = function() {
+  if (this.textElement_) {
     // Text has already been initialized once.
     return;
   }
-  this.sourceBlock_ = block;
-
   // Build the DOM.
   this.textElement_ = Blockly.createSvgElement('text',
       {'class': 'blocklyText', 'y': this.size_.height - 5}, null);
@@ -71,7 +68,7 @@ Blockly.FieldLabel.prototype.init = function(block) {
   if (!this.visible_) {
     this.textElement_.style.display = 'none';
   }
-  block.getSvgRoot().appendChild(this.textElement_);
+  this.sourceBlock_.getSvgRoot().appendChild(this.textElement_);
 
   // Configure the field to be transparent with respect to tooltips.
   this.textElement_.tooltip = this.sourceBlock_;

core/field_variable.js

@@ -82,7 +82,7 @@ Blockly.FieldVariable.prototype.setValidator = function(handler) {
  * @param {!Blockly.Block} block The block containing this text.
  */
 Blockly.FieldVariable.prototype.init = function(block) {
-  if (this.sourceBlock_) {
+  if (this.fieldGroup_) {
     // Dropdown has already been initialized once.
     return;
   }

core/inject.js

@@ -326,8 +326,8 @@ Blockly.inject.bindDocumentEvents_ = function() {
 
 /**
  * Load sounds for the given workspace.
- * @param options {string} The path to the media directory.
- * @param workspace {!Blockly.Workspace} The workspace to load sounds for.
+ * @param {string} options The path to the media directory.
+ * @param {!Blockly.Workspace} workspace The workspace to load sounds for.
  * @private
  */
 Blockly.inject.loadSounds_ = function(pathToMedia, workspace) {

core/input.js

@@ -84,8 +84,9 @@ Blockly.Input.prototype.appendField = function(field, opt_name) {
   if (goog.isString(field)) {
     field = new Blockly.FieldLabel(/** @type {string} */ (field));
   }
+  field.setSourceBlock(this.sourceBlock_);
   if (this.sourceBlock_.rendered) {
-    field.init(this.sourceBlock_);
+    field.init();
   }
   field.name = opt_name;