update elements and fix some bugs

lib/src/prism/plugins/previewer-color/prism-previewer-color.js

Index: lib/src/prism/plugins/previewer-color/prism-previewer-color.js
diff --git a/lib/src/prism/plugins/previewer-color/prism-previewer-color.js b/lib/src/prism/plugins/previewer-color/prism-previewer-color.js
new file mode 100644
index 0000000000000000000000000000000000000000..250e310f23fda62b048120458f91f71df9535f73
--- /dev/null
+++ b/lib/src/prism/plugins/previewer-color/prism-previewer-color.js
@@ -0,0 +1,89 @@
+(function() {
+
+	if (
+		typeof self !== 'undefined' && !self.Prism ||
+		typeof global !== 'undefined' && !global.Prism
+	) {
+		return;
+	}
+
+	var languages = {
+		'css': true,
+		'less': true,
+		'markup': {
+			lang: 'markup',
+			before: 'punctuation',
+			inside: 'inside',
+			root: Prism.languages.markup && Prism.languages.markup['tag'].inside['attr-value']
+		},
+		'sass': [
+			{
+				lang: 'sass',
+				before: 'punctuation',
+				inside: 'inside',
+				root: Prism.languages.sass && Prism.languages.sass['variable-line']
+			},
+			{
+				lang: 'sass',
+				inside: 'inside',
+				root: Prism.languages.sass && Prism.languages.sass['property-line']
+			}
+		],
+		'scss': true,
+		'stylus': [
+			{
+				lang: 'stylus',
+				before: 'hexcode',
+				inside: 'rest',
+				root: Prism.languages.stylus && Prism.languages.stylus['property-declaration'].inside
+			},
+			{
+				lang: 'stylus',
+				before: 'hexcode',
+				inside: 'rest',
+				root: Prism.languages.stylus && Prism.languages.stylus['variable-declaration'].inside
+			}
+		]
+	};
+
+	Prism.hooks.add('before-highlight', function (env) {
+		if (env.language && languages[env.language] && !languages[env.language].initialized) {
+			var lang = languages[env.language];
+			if (Prism.util.type(lang) !== 'Array') {
+				lang = [lang];
+			}
+			lang.forEach(function(lang) {
+				var before, inside, root, skip;
+				if (lang === true) {
+					before = 'important';
+					inside = env.language;
+					lang = env.language;
+				} else {
+					before = lang.before || 'important';
+					inside = lang.inside || lang.lang;
+					root = lang.root || Prism.languages;
+					skip = lang.skip;
+					lang = env.language;
+				}
+
+				if (!skip && Prism.languages[lang]) {
+					Prism.languages.insertBefore(inside, before, {
+						'color': /\B#(?:[0-9a-f]{3}){1,2}\b|\b(?:rgb|hsl)\(\s*\d{1,3}\s*,\s*\d{1,3}%?\s*,\s*\d{1,3}%?\s*\)\B|\b(?:rgb|hsl)a\(\s*\d{1,3}\s*,\s*\d{1,3}%?\s*,\s*\d{1,3}%?\s*,\s*(?:0|0?\.\d+|1)\s*\)\B|\b(?:AliceBlue|AntiqueWhite|Aqua|Aquamarine|Azure|Beige|Bisque|Black|BlanchedAlmond|Blue|BlueViolet|Brown|BurlyWood|CadetBlue|Chartreuse|Chocolate|Coral|CornflowerBlue|Cornsilk|Crimson|Cyan|DarkBlue|DarkCyan|DarkGoldenRod|DarkGray|DarkGreen|DarkKhaki|DarkMagenta|DarkOliveGreen|DarkOrange|DarkOrchid|DarkRed|DarkSalmon|DarkSeaGreen|DarkSlateBlue|DarkSlateGray|DarkTurquoise|DarkViolet|DeepPink|DeepSkyBlue|DimGray|DodgerBlue|FireBrick|FloralWhite|ForestGreen|Fuchsia|Gainsboro|GhostWhite|Gold|GoldenRod|Gray|Green|GreenYellow|HoneyDew|HotPink|IndianRed|Indigo|Ivory|Khaki|Lavender|LavenderBlush|LawnGreen|LemonChiffon|LightBlue|LightCoral|LightCyan|LightGoldenRodYellow|LightGray|LightGreen|LightPink|LightSalmon|LightSeaGreen|LightSkyBlue|LightSlateGray|LightSteelBlue|LightYellow|Lime|LimeGreen|Linen|Magenta|Maroon|MediumAquaMarine|MediumBlue|MediumOrchid|MediumPurple|MediumSeaGreen|MediumSlateBlue|MediumSpringGreen|MediumTurquoise|MediumVioletRed|MidnightBlue|MintCream|MistyRose|Moccasin|NavajoWhite|Navy|OldLace|Olive|OliveDrab|Orange|OrangeRed|Orchid|PaleGoldenRod|PaleGreen|PaleTurquoise|PaleVioletRed|PapayaWhip|PeachPuff|Peru|Pink|Plum|PowderBlue|Purple|Red|RosyBrown|RoyalBlue|SaddleBrown|Salmon|SandyBrown|SeaGreen|SeaShell|Sienna|Silver|SkyBlue|SlateBlue|SlateGray|Snow|SpringGreen|SteelBlue|Tan|Teal|Thistle|Tomato|Turquoise|Violet|Wheat|White|WhiteSmoke|Yellow|YellowGreen)\b/i
+					}, root);
+					env.grammar = Prism.languages[lang];
+
+					languages[env.language] = {initialized: true};
+				}
+			});
+		}
+	});
+
+	if (Prism.plugins.Previewer) {
+		new Prism.plugins.Previewer('color', function(value) {
+			this.style.backgroundColor = '';
+			this.style.backgroundColor = value;
+			return !!this.style.backgroundColor;
+		});
+	}
+
+}());