From cdaded42962b7763c114b9e8f96c5755213e2863 Mon Sep 17 00:00:00 2001
From: Neil Fraser <fraser@google.com>
Date: Tue, 4 Jun 2019 23:26:09 -0700
Subject: [PATCH] Remove goog.color.parse

---
 core/field_colour.js |   7 +--
 core/utils_colour.js | 106 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 108 insertions(+), 5 deletions(-)
 create mode 100644 core/utils_colour.js

diff --git a/core/field_colour.js b/core/field_colour.js
index c30f2bb76..d7cd85a33 100644
--- a/core/field_colour.js
+++ b/core/field_colour.js
@@ -30,9 +30,9 @@ goog.require('Blockly.DropDownDiv');
 goog.require('Blockly.Events');
 goog.require('Blockly.Events.BlockChange');
 goog.require('Blockly.Field');
+goog.require('Blockly.utils.colour');
 
 goog.require('goog.math.Size');
-goog.require('goog.color');
 
 
 /**
@@ -172,10 +172,7 @@ Blockly.FieldColour.prototype.doClassValidation_ = function(newValue) {
   if (typeof newValue != 'string') {
     return null;
   }
-  if (goog.color.isValidColor(newValue)) {
-    return goog.color.parse(newValue).hex;
-  }
-  return null;
+  return Blockly.utils.colour.parse(newValue);
 };
 
 /**
diff --git a/core/utils_colour.js b/core/utils_colour.js
new file mode 100644
index 000000000..7f4f02333
--- /dev/null
+++ b/core/utils_colour.js
@@ -0,0 +1,106 @@
+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * Copyright 2019 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 Utility methods for colour manipulation.
+ * These methods are not specific to Blockly, and could be factored out into
+ * a JavaScript framework such as Closure.
+ * @author fraser@google.com (Neil Fraser)
+ */
+'use strict';
+
+/**
+ * @name Blockly.utils.colour
+ * @namespace
+ */
+goog.provide('Blockly.utils.colour');
+
+goog.require('Blockly.utils');
+
+goog.require('goog.color');
+
+
+/**
+ * Parses a colour from a string.
+ * .parse('red') -> '#ff0000'
+ * .parse('#f00') -> '#ff0000'
+ * .parse('#ff0000') -> '#ff0000'
+ * .parse('rgb(255, 0, 0)') -> '#ff0000'
+ * @param {string} str Colour in some CSS format.
+ * @return {string|null} A string containing a hex representation of the colour,
+ *   or null if can't be parsed.
+ */
+Blockly.utils.colour.parse = function(str) {
+  str = String(str).toLowerCase().trim();
+  var hex = Blockly.utils.colour.names[str];
+  if (hex) {
+    // e.g. 'red'
+    return hex;
+  }
+  hex = str[0] == '#' ? str : '#' + str;
+  if (/^#[0-9a-f]{6}$/.test(hex)) {
+    // e.g. '#00ff88'
+    return hex;
+  }
+  if (/^#[0-9a-f]{3}$/.test(hex)) {
+    // e.g. '#0f8'
+    return ['#', hex[1], hex[1], hex[2], hex[2], hex[3], hex[3]].join('');
+  }
+  var rgb = str.match(/^(?:rgb)?\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/);
+  if (rgb) {
+    // e.g. 'rgb(0, 128, 255)'
+    var r = Number(rgb[1]);
+    var g = Number(rgb[2]);
+    var b = Number(rgb[3]);
+    if (r >= 0 && r < 256 && g >= 0 && g < 256 && b >= 0 && b < 256) {
+      return goog.color.rgbArrayToHex([r, g, b]);
+    }
+  }
+  return null;
+};
+
+
+
+/**
+ * A map that contains the 16 basic colour keywords as defined by W3C:
+ * https://www.w3.org/TR/2018/REC-css-color-3-20180619/#html4
+ * The keys of this map are the lowercase "readable" names of the colours,
+ * while the values are the "hex" values.
+ *
+ * @type {!Object<string, string>}
+ */
+Blockly.utils.colour.names = {
+  'aqua': '#00ffff',
+  'black': '#000000',
+  'blue': '#0000ff',
+  'fuchsia': '#ff00ff',
+  'gray': '#808080',
+  'green': '#008000',
+  'lime': '#00ff00',
+  'maroon': '#800000',
+  'navy': '#000080',
+  'olive': '#808000',
+  'purple': '#800080',
+  'red': '#ff0000',
+  'silver': '#c0c0c0',
+  'teal': '#008080',
+  'white': '#ffffff',
+  'yellow': '#ffff00'
+};