neo-blessed/lib/helpers.js

166 lines
3.4 KiB
JavaScript

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