Add lightweight field_number

core/field_number.js

@@ -0,0 +1,53 @@
+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * Copyright 2016 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Number input field
+ * @author fenichel@google.com (Rachel Fenichel)
+ */
+'use strict';
+
+goog.provide('Blockly.FieldNumber');
+
+goog.require('Blockly.FieldTextInput');
+
+/**
+ * Class for an editable number field.
+ * @param {string} text The initial content of the field.
+ * @param {Function=} opt_validator An optional function that is called
+ *     to validate any constraints on what the user entered.  Takes the new
+ *     text as an argument and returns either the accepted text, a replacement
+ *     text, or null to abort the change.
+ * @extends {Blockly.FieldTextInput}
+ * @constructor
+ */
+Blockly.FieldNumber = function(text, opt_validator) {
+  Blockly.FieldNumber.superClass_.constructor.call(this, text,
+      opt_validator);
+};
+goog.inherits(Blockly.FieldNumber, Blockly.FieldTextInput);
+
+/**
+ * Return the current value.
+ * @return {number} Current value as a number
+ */
+Blockly.FieldColour.prototype.getValue = function() {
+  return parseFloat(this.text_ || 0);
+};