From d89d8a211333311e684f15f3c2e8b60ea0b70ee6 Mon Sep 17 00:00:00 2001
From: Rachel Fenichel <fenichel@google.com>
Date: Wed, 4 May 2016 13:14:05 -0700
Subject: [PATCH] Add lightweight field_number

---
 blocks/math.js       |  2 +-
 core/block.js        |  3 +++
 core/blockly.js      |  1 +
 core/field_number.js | 53 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 core/field_number.js

diff --git a/blocks/math.js b/blocks/math.js
index 0350048c8..c19c693c6 100644
--- a/blocks/math.js
+++ b/blocks/math.js
@@ -43,7 +43,7 @@ Blockly.Blocks['math_number'] = {
     this.setHelpUrl(Blockly.Msg.MATH_NUMBER_HELPURL);
     this.setColour(Blockly.Blocks.math.HUE);
     this.appendDummyInput()
-        .appendField(new Blockly.FieldTextInput('0',
+        .appendField(new Blockly.FieldNumber('0',
         Blockly.FieldTextInput.numberValidator), 'NUM');
     this.setOutput(true, 'Number');
     // Assign 'this' to a variable for use in the tooltip closure below.
diff --git a/core/block.js b/core/block.js
index 8cdcdf7df..6524e98f9 100644
--- a/core/block.js
+++ b/core/block.js
@@ -1082,6 +1082,9 @@ Blockly.Block.prototype.interpolate_ = function(message, args, lastDummyAlign) {
             field = new Blockly.FieldImage(element['src'],
                 element['width'], element['height'], element['alt']);
             break;
+          case 'field_number':
+            field = new Blockly.FieldNumber(element['text']);
+            break;
           case 'field_date':
             if (Blockly.FieldDate) {
               field = new Blockly.FieldDate(element['date']);
diff --git a/core/blockly.js b/core/blockly.js
index aee1a20ca..07e51e8a2 100644
--- a/core/blockly.js
+++ b/core/blockly.js
@@ -38,6 +38,7 @@ goog.require('Blockly.FieldColour');
 goog.require('Blockly.FieldDropdown');
 goog.require('Blockly.FieldImage');
 goog.require('Blockly.FieldTextInput');
+goog.require('Blockly.FieldNumber');
 goog.require('Blockly.FieldVariable');
 goog.require('Blockly.Generator');
 goog.require('Blockly.Msg');
diff --git a/core/field_number.js b/core/field_number.js
new file mode 100644
index 000000000..600464173
--- /dev/null
+++ b/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);
+};