166 lines
3.4 KiB
JavaScript
166 lines
3.4 KiB
JavaScript
/**
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* helpers.js - helpers for blessed
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* Copyright (c) 2013-2015, Christopher Jeffrey and contributors (MIT License).
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* https://github.com/chjj/blessed
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*/
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/**
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* Modules
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*/
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var fs = require('fs');
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var unicode = require('./unicode');
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/**
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* Helpers
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*/
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var helpers = exports;
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helpers.merge = function(a, b) {
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Object.keys(b).forEach(function(key) {
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a[key] = b[key];
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});
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return a;
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};
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helpers.asort = function(obj) {
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return obj.sort(function(a, b) {
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a = a.name.toLowerCase();
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b = b.name.toLowerCase();
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if (a[0] === '.' && b[0] === '.') {
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a = a[1];
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b = b[1];
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} else {
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a = a[0];
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b = b[0];
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}
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return a > b ? 1 : (a < b ? -1 : 0);
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});
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};
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helpers.hsort = function(obj) {
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return obj.sort(function(a, b) {
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return b.index - a.index;
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});
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};
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helpers.findFile = function(start, target) {
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return (function read(dir) {
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var files, file, stat, out;
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if (dir === '/dev' || dir === '/sys'
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|| dir === '/proc' || dir === '/net') {
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return null;
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}
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try {
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files = fs.readdirSync(dir);
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} catch (e) {
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files = [];
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}
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for (var i = 0; i < files.length; i++) {
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file = files[i];
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if (file === target) {
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return (dir === '/' ? '' : dir) + '/' + file;
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}
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try {
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stat = fs.lstatSync((dir === '/' ? '' : dir) + '/' + file);
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} catch (e) {
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stat = null;
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}
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if (stat && stat.isDirectory() && !stat.isSymbolicLink()) {
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out = read((dir === '/' ? '' : dir) + '/' + file);
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if (out) return out;
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}
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}
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return null;
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})(start);
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};
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// Escape text for tag-enabled elements.
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helpers.escape = function(text) {
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return text.replace(/[{}]/g, function(ch) {
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return ch === '{' ? '{open}' : '{close}';
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});
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};
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helpers.parseTags = function(text, screen) {
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return helpers.Element.prototype._parseTags.call(
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{ parseTags: true, screen: screen || helpers.Screen.global }, text);
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};
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helpers.generateTags = function(style, text) {
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var open = ''
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, close = '';
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Object.keys(style || {}).forEach(function(key) {
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var val = style[key];
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if (typeof val === 'string') {
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val = val.replace(/^light(?!-)/, 'light-');
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val = val.replace(/^bright(?!-)/, 'bright-');
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open = '{' + val + '-' + key + '}' + open;
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close += '{/' + val + '-' + key + '}';
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} else {
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if (val === true) {
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open = '{' + key + '}' + open;
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close += '{/' + key + '}';
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}
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}
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});
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if (text != null) {
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return open + text + close;
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}
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return {
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open: open,
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close: close
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};
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};
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helpers.attrToBinary = function(style, element) {
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return helpers.Element.prototype.sattr.call(element || {}, style);
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};
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helpers.stripTags = function(text) {
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if (!text) return '';
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return text
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.replace(/{(\/?)([\w\-,;!#]*)}/g, '')
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.replace(/\x1b\[[\d;]*m/g, '');
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};
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helpers.cleanTags = function(text) {
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return helpers.stripTags(text).trim();
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};
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helpers.dropUnicode = function(text) {
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if (!text) return '';
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return text
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.replace(unicode.chars.all, '??')
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.replace(unicode.chars.combining, '')
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.replace(unicode.chars.surrogate, '?');
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};
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helpers.__defineGetter__('Screen', function() {
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if (!helpers._screen) {
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helpers._screen = require('./widgets/screen');
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}
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return helpers._screen;
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});
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helpers.__defineGetter__('Element', function() {
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if (!helpers._element) {
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helpers._element = require('./widgets/element');
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}
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return helpers._element;
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});
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