anser

A low level parser for ANSI sequences.

Installation

$ npm i anser

Example

"use strict";

const Anser = require("anser");

const txt = "\u001b[38;5;196mHello\u001b[39m \u001b[48;5;226mWorld\u001b[49m";

console.log(Anser.ansiToHtml(txt));
// <span style="color:rgb(255, 0, 0)">Hello</span> <span style="background-color:rgb(255, 255, 0)">World</span>

console.log(Anser.ansiToHtml(txt, { use_classes: true }));
// <span class="ansi-palette-196-fg">Hello</span> <span class="ansi-palette-226-bg">World</span>

console.log(Anser.ansiToJson(txt));
// [ { content: '',
//     fg: null,
//     bg: null,
//     fg_truecolor: null,
//     bg_truecolor: null,
//     clearLine: undefined,
//     decoration: null,
//     was_processed: false,
//     isEmpty: [Function: isEmpty] },
//   { content: 'Hello',
//     fg: '255, 0, 0',
//     bg: null,
//     fg_truecolor: null,
//     bg_truecolor: null,
//     clearLine: false,
//     decoration: null,
//     was_processed: true,
//     isEmpty: [Function: isEmpty] },
//   { content: ' ',
//     fg: null,
//     bg: null,
//     fg_truecolor: null,
//     bg_truecolor: null,
//     clearLine: false,
//     decoration: null,
//     was_processed: false,
//     isEmpty: [Function: isEmpty] },
//   { content: 'World',
//     fg: null,
//     bg: '255, 255, 0',
//     fg_truecolor: null,
//     bg_truecolor: null,
//     clearLine: false,
//     decoration: null,
//     was_processed: true,
//     isEmpty: [Function: isEmpty] },
//   { content: '',
//     fg: null,
//     bg: null,
//     fg_truecolor: null,
//     bg_truecolor: null,
//     clearLine: false,
//     decoration: null,
//     was_processed: false,
//     isEmpty: [Function: isEmpty] } ]

Documentation

`Anser.escapeForHtml(txt)`

Escape the input HTML.

This does the minimum escaping of text to make it compliant with HTML. In particular, the '&','<', and '>' characters are escaped. This should be run prior to ansiToHtml.

Params

String txt: The input text (containing the ANSI snippets).

Return

String The escaped html.

`Anser.linkify(txt)`

Adds the links in the HTML.

This replaces any links in the text with anchor tags that display the link. The links should have at least one whitespace character surrounding it. Also, you should apply this after you have run ansiToHtml on the text.

Params

String txt: The input text.

Return

String The HTML containing the tags (unescaped).

`Anser.ansiToHtml(txt, options)`

This replaces ANSI terminal escape codes with SPAN tags that wrap the content.

This function only interprets ANSI SGR (Select Graphic Rendition) codes that can be represented in HTML. For example, cursor movement codes are ignored and hidden from output. The default style uses colors that are very close to the prescribed standard. The standard assumes that the text will have a black background. These colors are set as inline styles on the SPAN tags.

Another option is to set use_classes: true in the options argument. This will instead set classes on the spans so the colors can be set via CSS. The class names used are of the format ansi-*-fg/bg and ansi-bright-*-fg/bg where * is the color name, i.e black/red/green/yellow/blue/magenta/cyan/white.

Params

String txt: The input text.
Object options: The options passed to the ansiToHTML method.

Return

String The HTML output.

`Anser.ansiToJson(txt, options)`

Converts ANSI input into JSON output.

Params

String txt: The input text.
Object options: The options passed to the ansiToHTML method.

Return

String The HTML output.

`Anser.ansiToText(txt)`

Converts ANSI input into text output.

Params

String txt: The input text.

Return

String The text output.

`Anser()`

The Anser class.

Return

Anser

`setupPalette()`

Sets up the palette.

`escapeForHtml(txt)`

Escapes the input text.

Params

String txt: The input text.

Return

String The escpaed HTML output.

`linkify(txt)`

Adds HTML link elements.

Params

String txt: The input text.

Return

String The HTML output containing link elements.

`ansiToHtml(txt, options)`

Converts ANSI input into HTML output.

Params

String txt: The input text.
Object options: The options passed ot the process method.

Return

String The HTML output.

`ansiToJson(txt, options)`

Converts ANSI input into HTML output.

Params

String txt: The input text.
Object options: The options passed ot the process method.

Return

String The JSON output.

`ansiToText(txt)`

Converts ANSI input into HTML output.

Params

String txt: The input text.

Return

String The text output.

`process(txt, options, markup)`

Processes the input.

Params

String txt: The input text.
Object options: An object passed to processChunk method, extended with:
json (Boolean): If true, the result will be an object.
use_classes (Boolean): If true, HTML classes will be appended to the HTML output.
Boolean markup:

`processChunkJson(text, options, markup)`

Processes the current chunk into json output.

Params

String text: The input text.
Object options: An object containing the following fields:
json (Boolean): If true, the result will be an object.
use_classes (Boolean): If true, HTML classes will be appended to the HTML output.
Boolean markup: If false, the colors will not be parsed.

Return

Object The result object:
content (String): The text.
fg (String|null): The foreground color.
bg (String|null): The background color.
fg_truecolor (String|null): The foreground true color (if 16m color is enabled).
bg_truecolor (String|null): The background true color (if 16m color is enabled).
clearLine (Boolean): true if a carriageReturn \r was fount at end of line.
was_processed (Bolean): true if the colors were processed, false otherwise.
isEmpty (Function): A function returning true if the content is empty, or false otherwise.

`processChunk(text, options, markup)`

Processes the current chunk of text.

Params

String text: The input text.
Object options: An object containing the following fields:
json (Boolean): If true, the result will be an object.
use_classes (Boolean): If true, HTML classes will be appended to the HTML output.
Boolean markup: If false, the colors will not be parsed.

Return

Object|String The result (object if json is wanted back or string otherwise).

How to contribute

Have an idea? Found a bug? See how to contribute.

License

See the LICENSE file.

Current Tags

2.1.1 ... latest (4 years ago)

4 Versions

2.1.1 ... 4 years ago
1.3.0 ... 8 years ago
1.2.5 ... 8 years ago
1.4.1 ... 8 years ago