static/ansi-to-html.ts - compiler-explorer - Rivoreo Source Code Repositories

 /* eslint-disable header/header */

 // Copyright (c) 2012 Rob Burns
 //
 // Permission is hereby granted, free of charge, to any person
 // obtaining a copy of this software and associated documentation
 // files (the "Software"), to deal in the Software without
 // restriction, including without limitation the rights to use,
 // copy, modify, merge, publish, distribute, sublicense, and/or sell
 // copies of the Software, and to permit persons to whom the
 // Software is furnished to do so, subject to the following
 // conditions:
 //
 // The above copyright notice and this permission notice shall be
 // included in all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 // OTHER DEALINGS IN THE SOFTWARE.

 // Converted from https://github.com/rburns/ansi-to-html
 // Includes patches from https://github.com/rburns/ansi-to-html/pull/84
 // Converted to typescript by MarkusJx

 import _ from 'underscore';
 import {AnsiToHtmlOptions, ColorCodes} from './ansi-to-html.interfaces';

 const defaults: AnsiToHtmlOptions = {
     fg: '#FFF',
     bg: '#000',
     newline: false,
     escapeXML: false,
     stream: false,
     colors: getDefaultColors(),
 };

 function getDefaultColors(): ColorCodes {
     const colors: ColorCodes = {
         0: '#000',
         1: '#A00',
         2: '#0A0',
         3: '#A50',
         4: '#00A',
         5: '#A0A',
         6: '#0AA',
         7: '#AAA',
         8: '#555',
         9: '#F55',
         10: '#5F5',
         11: '#FF5',
         12: '#55F',
         13: '#F5F',
         14: '#5FF',
         15: '#FFF',
     };

     range(0, 5).forEach(red => {
         range(0, 5).forEach(green => {
             range(0, 5).forEach(blue => {
                 setStyleColor(red, green, blue, colors);
             });
         });
     });

     range(0, 23).forEach(gray => {
         const c = gray + 232;
         const l = toHexString(gray * 10 + 8);

         colors[c] = `#${l}${l}${l}`;
     });

     return colors;
 }

 function setStyleColor(red: number, green: number, blue: number, colors: ColorCodes): void {
     const c = 16 + red * 36 + green * 6 + blue;
     const r = red > 0 ? red * 40 + 55 : 0;
     const g = green > 0 ? green * 40 + 55 : 0;
     const b = blue > 0 ? blue * 40 + 55 : 0;

     colors[c] = toColorHexString([r, g, b]);
 }

 /**
  * Converts from a number like 15 to a hex string like 'F'
  *
  * @param num - the number to convert
  * @returns the resulting hex string
  */
 function toHexString(num: number): string {
     let str = num.toString(16);

     while (str.length < 2) {
         str = '0' + str;
     }

     return str;
 }

 /**
  * Converts from an array of numbers like [15, 15, 15] to a hex string like 'FFF'
  *
  * @param ref - the array of numbers to join
  * @returns the resulting hex string
  */
 function toColorHexString(ref: number[]): string {
     const results: string[] = [];

     for (let j = 0, len = ref.length; j < len; j++) {
         results.push(toHexString(ref[j]));
     }

     return '#' + results.join('');
 }

 function generateOutput(stack: string[], token: string, data: string | number, options: AnsiToHtmlOptions): string {
     if (token === 'text') {
         // Note: Param 'data' must be a string at this point
         return pushText(data as string, options);
     } else if (token === 'display') {
         return handleDisplay(stack, data, options);
     } else if (token === 'xterm256') {
         // Note: Param 'data' must be a string at this point
         return handleXterm256(stack, data as string, options);
     }
     return '';
 }

 function handleXterm256(stack: string[], data: string, options: AnsiToHtmlOptions): string {
     data = data.substring(2).slice(0, -1);
     const operation = +data.substr(0, 2);
     const color = +data.substr(5);
     if (operation === 38) {
         // @ts-ignore Colors is autogenerated
         return pushForegroundColor(stack, options.colors[color]);
     } else {
         // @ts-ignore Colors is autogenerated
         return pushBackgroundColor(stack, options.colors[color]);
     }
 }

 function handleDisplay(stack: string[], _code: string | number, options: AnsiToHtmlOptions): string {
     const code: number = parseInt(_code as string, 10);
     const codeMap: Record<number, () => string> = {
         '-1': () => '<br />',
         // @ts-ignore
         0: () => stack.length && resetStyles(stack),
         1: () => pushTag(stack, 'b'),
         2: () => pushStyle(stack, 'opacity:0.6'),
         3: () => pushTag(stack, 'i'),
         4: () => pushTag(stack, 'u'),
         8: () => pushStyle(stack, 'display:none'),
         9: () => pushTag(stack, 'strike'),
         22: () => closeTag(stack, 'b'),
         23: () => closeTag(stack, 'i'),
         24: () => closeTag(stack, 'u'),
         39: () => pushForegroundColor(stack, options.fg as string),
         49: () => pushBackgroundColor(stack, options.bg as string),
     };

     if (code in codeMap) {
         return codeMap[code]();
     } else if (4 < code && code < 7) {
         return pushTag(stack, 'blink');
     } else if (29 < code && code < 38) {
         // @ts-ignore
         return pushForegroundColor(stack, options.colors[code - 30]);
     } else if (39 < code && code < 48) {
         // @ts-ignore
         return pushBackgroundColor(stack, options.colors[code - 40]);
     } else if (89 < code && code < 98) {
         // @ts-ignore
         return pushForegroundColor(stack, options.colors[8 + (code - 90)]);
     } else if (99 < code && code < 108) {
         // @ts-ignore
         return pushBackgroundColor(stack, options.colors[8 + (code - 100)]);
     }
     return 'Unknown code';
 }

 /**
  * Clear all the styles
  */
 function resetStyles(stack: string[]): string {
     const stackClone = stack.slice(0);
     stack.length = 0;

     return stackClone
         .reverse()
         .map(tag => `</${tag}>`)
         .join('');
 }

 /**
  * Creates an array of numbers ranging from low to high
  *
  * @param low - the lowest number in the array to create
  * @param high - the highest number in the array to create
  * @returns the resulting array
  * @example range(3, 7); // creates [3, 4, 5, 6, 7]
  */
 function range(low: number, high: number): number[] {
     const results: number[] = [];

     for (let j = low; j <= high; j++) {
         results.push(j);
     }

     return results;
 }

 /**
  * Returns a new function that is true if value is NOT the same category
  */
 function notCategory(category: string): (e: StickyStackElement) => boolean {
     return (e: StickyStackElement): boolean => {
         return e.category !== category && category !== 'all';
     };
 }

 /**
  * Converts a code into an ansi token type
  *
  * @param _code - the code to convert
  * @returns the ansi token type
  */
 function categoryForCode(_code: string | number): string {
     const code: number = parseInt(_code as string, 10);

     if (code === 0) {
         return 'all';
     } else if (code === 1) {
         return 'bold';
     } else if (2 < code && code < 5) {
         return 'underline';
     } else if (4 < code && code < 7) {
         return 'blink';
     } else if (code === 8) {
         return 'hide';
     } else if (code === 9) {
         return 'strike';
     } else if ((29 < code && code < 38) || code === 39 || (89 < code && code < 98)) {
         return 'foreground-color';
     } else if ((39 < code && code < 48) || code === 49 || (99 < code && code < 108)) {
         return 'background-color';
     }
     return '';
 }

 function pushText(text: string, options: AnsiToHtmlOptions): string {
     if (options.escapeXML) {
         return text.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
     }

     return text;
 }

 function pushTag(stack: string[], tag: string, style?: string): string {
     if (!style) {
         style = '';
     }

     stack.push(tag);

     return ['<' + tag, style ? ' style="' + style + '"' : void 0, '>'].join('');
 }

 function pushStyle(stack: string[], style: string): string {
     return pushTag(stack, 'span', style);
 }

 function pushForegroundColor(stack: string[], color: string): string {
     return pushTag(stack, 'span', 'color:' + color);
 }

 function pushBackgroundColor(stack: string[], color: string): string {
     return pushTag(stack, 'span', 'background-color:' + color);
 }

 function closeTag(stack: string[], style: string): string {
     let last: string | null = null;

     if (stack.slice(-1)[0] === style) {
         last = stack.pop() || null;
     }

     if (last) {
         return '</' + style + '>';
     }
     return '';
 }

 type TokenizeCallback = (token: string, data: string | number) => void;

 interface Token {
     pattern: RegExp;
     sub: (m: string, ...args: any[]) => string;
 }

 function tokenize(text: string, options: AnsiToHtmlOptions, callback: TokenizeCallback) {
     let ansiMatch = false;
     const ansiHandler = 3;

     function remove(): string {
         return '';
     }

     function removeXterm256(m: string): string {
         callback('xterm256', m);
         return '';
     }

     function newline(m: string): string {
         if (options.newline) {
             callback('display', -1);
         } else {
             callback('text', m);
         }

         return '';
     }

     function ansiMess(m: string, g1: string): string {
         ansiMatch = true;
         if (g1.trim().length === 0) {
             g1 = '0';
         }

         const res: string[] = g1.replace(/;+$/, '').split(';');

         for (let o = 0, len = res.length; o < len; o++) {
             callback('display', res[o]);
         }

         return '';
     }

     function realText(m: string): string {
         callback('text', m);

         return '';
     }

     /* eslint no-control-regex:0 */
     const tokens: Token[] = [
         {
             pattern: /^\x08+/,
             sub: remove,
         },
         {
             pattern: /^\x1b\[[012]?K/,
             sub: remove,
         },
         {
             pattern: /^\x1b\[[34]8;5;(\d+)m/,
             sub: removeXterm256,
         },
         {
             pattern: /^\n/,
             sub: newline,
         },
         {
             pattern: /^\x1b\[((?:\d{1,3};)*\d{1,3}|)m/,
             sub: ansiMess,
         },
         {
             pattern: /^\x1b\[?[\d;]{0,3}/,
             sub: remove,
         },
         {
             pattern: /^([^\x1b\x08\n]+)/,
             sub: realText,
         },
     ];

     function process(handler: Token, i: number): void {
         if (i > ansiHandler && ansiMatch) {
             return;
         }

         ansiMatch = false;

         text = text.replace(handler.pattern, handler.sub);
     }

     let handler: Token;
     const results1: number[] = [];
     let length: number = text.length;

     outer: while (length > 0) {
         for (let i = 0, o = 0, len = tokens.length; o < len; i = ++o) {
             handler = tokens[i];
             process(handler, i);

             if (text.length !== length) {
                 // We matched a token and removed it from the text. We need to
                 // start matching *all* tokens against the new text.
                 length = text.length;
                 continue outer;
             }
         }

         if (text.length === length) {
             break;
         } else {
             results1.push(0);
         }

         length = text.length;
     }

     return results1;
 }

 /**
  * A sticky stack element
  */
 interface StickyStackElement {
     token: string;
     data: number | string;
     category: string;
 }

 /**
  * If streaming, then the stack is "sticky"
  */
 function updateStickyStack(
     stickyStack: StickyStackElement[],
     token: string,
     data: string | number
 ): StickyStackElement[] {
     if (token !== 'text') {
         stickyStack = stickyStack.filter(notCategory(categoryForCode(data)));
         stickyStack.push({
             token: token,
             data: data,
             category: categoryForCode(data),
         });
     }

     return stickyStack;
 }

 export class Filter {
     private readonly opts: AnsiToHtmlOptions;
     private readonly stack: string[];
     private stickyStack: StickyStackElement[];

     public constructor(options: AnsiToHtmlOptions) {
         if (options.colors) {
             options.colors = _.extend(defaults.colors, options.colors);
         }

         this.opts = _.extend({}, defaults, options);
         this.stack = [];
         this.stickyStack = [];
     }

     public toHtml(_input: string | string[]): string {
         const input: string[] = typeof _input === 'string' ? [_input] : _input;
         const stack = this.stack;
         const options = this.opts;
         const buf: string[] = [];

         this.stickyStack.forEach((element: StickyStackElement) => {
             const output: string = generateOutput(stack, element.token, element.data, options);

             if (output) {
                 buf.push(output);
             }
         });

         tokenize(input.join(''), options, (token, data) => {
             const output = generateOutput(stack, token, data, options);

             if (output) {
                 buf.push(output);
             }

             if (options.stream) {
                 this.stickyStack = updateStickyStack(this.stickyStack, token, data);
             }
         });

         if (stack.length) {
             buf.push(resetStyles(stack));
         }

         return buf.join('');
     }
 }
	/* eslint-disable header/header */

	// Copyright (c) 2012 Rob Burns
	//
	// Permission is hereby granted, free of charge, to any person
	// obtaining a copy of this software and associated documentation
	// files (the "Software"), to deal in the Software without
	// restriction, including without limitation the rights to use,
	// copy, modify, merge, publish, distribute, sublicense, and/or sell
	// copies of the Software, and to permit persons to whom the
	// Software is furnished to do so, subject to the following
	// conditions:
	//
	// The above copyright notice and this permission notice shall be
	// included in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
	// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
	// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
	// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	// OTHER DEALINGS IN THE SOFTWARE.

	// Converted from https://github.com/rburns/ansi-to-html
	// Includes patches from https://github.com/rburns/ansi-to-html/pull/84
	// Converted to typescript by MarkusJx

	import _ from 'underscore';
	import {AnsiToHtmlOptions, ColorCodes} from './ansi-to-html.interfaces';

	const defaults: AnsiToHtmlOptions = {
	fg: '#FFF',
	bg: '#000',
	newline: false,
	escapeXML: false,
	stream: false,
	colors: getDefaultColors(),
	};

	function getDefaultColors(): ColorCodes {
	const colors: ColorCodes = {
	0: '#000',
	1: '#A00',
	2: '#0A0',
	3: '#A50',
	4: '#00A',
	5: '#A0A',
	6: '#0AA',
	7: '#AAA',
	8: '#555',
	9: '#F55',
	10: '#5F5',
	11: '#FF5',
	12: '#55F',
	13: '#F5F',
	14: '#5FF',
	15: '#FFF',
	};

	range(0, 5).forEach(red => {
	range(0, 5).forEach(green => {
	range(0, 5).forEach(blue => {
	setStyleColor(red, green, blue, colors);
	});
	});
	});

	range(0, 23).forEach(gray => {
	const c = gray + 232;
	const l = toHexString(gray * 10 + 8);

	colors[c] = `#${l}${l}${l}`;
	});

	return colors;
	}

	function setStyleColor(red: number, green: number, blue: number, colors: ColorCodes): void {
	const c = 16 + red * 36 + green * 6 + blue;
	const r = red > 0 ? red * 40 + 55 : 0;
	const g = green > 0 ? green * 40 + 55 : 0;
	const b = blue > 0 ? blue * 40 + 55 : 0;

	colors[c] = toColorHexString([r, g, b]);
	}

	/**
	* Converts from a number like 15 to a hex string like 'F'
	*
	* @param num - the number to convert
	* @returns the resulting hex string
	*/
	function toHexString(num: number): string {
	let str = num.toString(16);

	while (str.length < 2) {
	str = '0' + str;
	}

	return str;
	}

	/**
	* Converts from an array of numbers like [15, 15, 15] to a hex string like 'FFF'
	*
	* @param ref - the array of numbers to join
	* @returns the resulting hex string
	*/
	function toColorHexString(ref: number[]): string {
	const results: string[] = [];

	for (let j = 0, len = ref.length; j < len; j++) {
	results.push(toHexString(ref[j]));
	}

	return '#' + results.join('');
	}

	function generateOutput(stack: string[], token: string, data: string \| number, options: AnsiToHtmlOptions): string {
	if (token === 'text') {
	// Note: Param 'data' must be a string at this point
	return pushText(data as string, options);
	} else if (token === 'display') {
	return handleDisplay(stack, data, options);
	} else if (token === 'xterm256') {
	// Note: Param 'data' must be a string at this point
	return handleXterm256(stack, data as string, options);
	}
	return '';
	}

	function handleXterm256(stack: string[], data: string, options: AnsiToHtmlOptions): string {
	data = data.substring(2).slice(0, -1);
	const operation = +data.substr(0, 2);
	const color = +data.substr(5);
	if (operation === 38) {
	// @ts-ignore Colors is autogenerated
	return pushForegroundColor(stack, options.colors[color]);
	} else {
	// @ts-ignore Colors is autogenerated
	return pushBackgroundColor(stack, options.colors[color]);
	}
	}

	function handleDisplay(stack: string[], _code: string \| number, options: AnsiToHtmlOptions): string {
	const code: number = parseInt(_code as string, 10);
	const codeMap: Record<number, () => string> = {
	'-1': () => '<br />',
	// @ts-ignore
	0: () => stack.length && resetStyles(stack),
	1: () => pushTag(stack, 'b'),
	2: () => pushStyle(stack, 'opacity:0.6'),
	3: () => pushTag(stack, 'i'),
	4: () => pushTag(stack, 'u'),
	8: () => pushStyle(stack, 'display:none'),
	9: () => pushTag(stack, 'strike'),
	22: () => closeTag(stack, 'b'),
	23: () => closeTag(stack, 'i'),
	24: () => closeTag(stack, 'u'),
	39: () => pushForegroundColor(stack, options.fg as string),
	49: () => pushBackgroundColor(stack, options.bg as string),
	};

	if (code in codeMap) {
	return codeMap[code]();
	} else if (4 < code && code < 7) {
	return pushTag(stack, 'blink');
	} else if (29 < code && code < 38) {
	// @ts-ignore
	return pushForegroundColor(stack, options.colors[code - 30]);
	} else if (39 < code && code < 48) {
	// @ts-ignore
	return pushBackgroundColor(stack, options.colors[code - 40]);
	} else if (89 < code && code < 98) {
	// @ts-ignore
	return pushForegroundColor(stack, options.colors[8 + (code - 90)]);
	} else if (99 < code && code < 108) {
	// @ts-ignore
	return pushBackgroundColor(stack, options.colors[8 + (code - 100)]);
	}
	return 'Unknown code';
	}

	/**
	* Clear all the styles
	*/
	function resetStyles(stack: string[]): string {
	const stackClone = stack.slice(0);
	stack.length = 0;

	return stackClone
	.reverse()
	.map(tag => `</${tag}>`)
	.join('');
	}

	/**
	* Creates an array of numbers ranging from low to high
	*
	* @param low - the lowest number in the array to create
	* @param high - the highest number in the array to create
	* @returns the resulting array
	* @example range(3, 7); // creates [3, 4, 5, 6, 7]
	*/
	function range(low: number, high: number): number[] {
	const results: number[] = [];

	for (let j = low; j <= high; j++) {
	results.push(j);
	}

	return results;
	}

	/**
	* Returns a new function that is true if value is NOT the same category
	*/
	function notCategory(category: string): (e: StickyStackElement) => boolean {
	return (e: StickyStackElement): boolean => {
	return e.category !== category && category !== 'all';
	};
	}

	/**
	* Converts a code into an ansi token type
	*
	* @param _code - the code to convert
	* @returns the ansi token type
	*/
	function categoryForCode(_code: string \| number): string {
	const code: number = parseInt(_code as string, 10);

	if (code === 0) {
	return 'all';
	} else if (code === 1) {
	return 'bold';
	} else if (2 < code && code < 5) {
	return 'underline';
	} else if (4 < code && code < 7) {
	return 'blink';
	} else if (code === 8) {
	return 'hide';
	} else if (code === 9) {
	return 'strike';
	} else if ((29 < code && code < 38) \|\| code === 39 \|\| (89 < code && code < 98)) {
	return 'foreground-color';
	} else if ((39 < code && code < 48) \|\| code === 49 \|\| (99 < code && code < 108)) {
	return 'background-color';
	}
	return '';
	}

	function pushText(text: string, options: AnsiToHtmlOptions): string {
	if (options.escapeXML) {
	return text.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>');
	}

	return text;
	}

	function pushTag(stack: string[], tag: string, style?: string): string {
	if (!style) {
	style = '';
	}

	stack.push(tag);

	return ['<' + tag, style ? ' style="' + style + '"' : void 0, '>'].join('');
	}

	function pushStyle(stack: string[], style: string): string {
	return pushTag(stack, 'span', style);
	}

	function pushForegroundColor(stack: string[], color: string): string {
	return pushTag(stack, 'span', 'color:' + color);
	}

	function pushBackgroundColor(stack: string[], color: string): string {
	return pushTag(stack, 'span', 'background-color:' + color);
	}

	function closeTag(stack: string[], style: string): string {
	let last: string \| null = null;

	if (stack.slice(-1)[0] === style) {
	last = stack.pop() \|\| null;
	}

	if (last) {
	return '</' + style + '>';
	}
	return '';
	}

	type TokenizeCallback = (token: string, data: string \| number) => void;

	interface Token {
	pattern: RegExp;
	sub: (m: string, ...args: any[]) => string;
	}

	function tokenize(text: string, options: AnsiToHtmlOptions, callback: TokenizeCallback) {
	let ansiMatch = false;
	const ansiHandler = 3;

	function remove(): string {
	return '';
	}

	function removeXterm256(m: string): string {
	callback('xterm256', m);
	return '';
	}

	function newline(m: string): string {
	if (options.newline) {
	callback('display', -1);
	} else {
	callback('text', m);
	}

	return '';
	}

	function ansiMess(m: string, g1: string): string {
	ansiMatch = true;
	if (g1.trim().length === 0) {
	g1 = '0';
	}

	const res: string[] = g1.replace(/;+$/, '').split(';');

	for (let o = 0, len = res.length; o < len; o++) {
	callback('display', res[o]);
	}

	return '';
	}

	function realText(m: string): string {
	callback('text', m);

	return '';
	}

	/* eslint no-control-regex:0 */
	const tokens: Token[] = [
	{
	pattern: /^\x08+/,
	sub: remove,
	},
	{
	pattern: /^\x1b\[[012]?K/,
	sub: remove,
	},
	{
	pattern: /^\x1b\[[34]8;5;(\d+)m/,
	sub: removeXterm256,
	},
	{
	pattern: /^\n/,
	sub: newline,
	},
	{
	pattern: /^\x1b\[((?:\d{1,3};)*\d{1,3}\|)m/,
	sub: ansiMess,
	},
	{
	pattern: /^\x1b\[?[\d;]{0,3}/,
	sub: remove,
	},
	{
	pattern: /^([^\x1b\x08\n]+)/,
	sub: realText,
	},
	];

	function process(handler: Token, i: number): void {
	if (i > ansiHandler && ansiMatch) {
	return;
	}

	ansiMatch = false;

	text = text.replace(handler.pattern, handler.sub);
	}

	let handler: Token;
	const results1: number[] = [];
	let length: number = text.length;

	outer: while (length > 0) {
	for (let i = 0, o = 0, len = tokens.length; o < len; i = ++o) {
	handler = tokens[i];
	process(handler, i);

	if (text.length !== length) {
	// We matched a token and removed it from the text. We need to
	// start matching all tokens against the new text.
	length = text.length;
	continue outer;
	}
	}

	if (text.length === length) {
	break;
	} else {
	results1.push(0);
	}

	length = text.length;
	}

	return results1;
	}

	/**
	* A sticky stack element
	*/
	interface StickyStackElement {
	token: string;
	data: number \| string;
	category: string;
	}

	/**
	* If streaming, then the stack is "sticky"
	*/
	function updateStickyStack(
	stickyStack: StickyStackElement[],
	token: string,
	data: string \| number
	): StickyStackElement[] {
	if (token !== 'text') {
	stickyStack = stickyStack.filter(notCategory(categoryForCode(data)));
	stickyStack.push({
	token: token,
	data: data,
	category: categoryForCode(data),
	});
	}

	return stickyStack;
	}

	export class Filter {
	private readonly opts: AnsiToHtmlOptions;
	private readonly stack: string[];
	private stickyStack: StickyStackElement[];

	public constructor(options: AnsiToHtmlOptions) {
	if (options.colors) {
	options.colors = _.extend(defaults.colors, options.colors);
	}

	this.opts = _.extend({}, defaults, options);
	this.stack = [];
	this.stickyStack = [];
	}

	public toHtml(_input: string \| string[]): string {
	const input: string[] = typeof _input === 'string' ? [_input] : _input;
	const stack = this.stack;
	const options = this.opts;
	const buf: string[] = [];

	this.stickyStack.forEach((element: StickyStackElement) => {
	const output: string = generateOutput(stack, element.token, element.data, options);

	if (output) {
	buf.push(output);
	}
	});

	tokenize(input.join(''), options, (token, data) => {
	const output = generateOutput(stack, token, data, options);

	if (output) {
	buf.push(output);
	}

	if (options.stream) {
	this.stickyStack = updateStickyStack(this.stickyStack, token, data);
	}
	});

	if (stack.length) {
	buf.push(resetStyles(stack));
	}

	return buf.join('');
	}
	}