move
Version:
A programming language
277 lines (245 loc) • 8.8 kB
JavaScript
/**
* Copyright 2009, 2010 Ryan Lienhart Dahl. All rights reserved.
* 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.
*/
/**
* Echos the value of a value. Trys to print the value out
* in the best way possible given the different types.
*
* @param {Object} obj The object to print out.
* @param {Boolean} showHidden Flag that shows hidden (not enumerable)
* properties of objects.
* @param {Number} depth Depth in which to descend in object. Default is 2.
* @param {Boolean} colors Flag to turn on ANSI escape codes to color the
* output. Default is false (no coloring).
*/
exports.inspect = function(obj, showHidden, depth, colors) {
var seen = [];
var /*stylize = function(str, styleType) {
// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
var styles =
{ 'bold' : [1, 22],
'italic' : [3, 23],
'underline' : [4, 24],
'inverse' : [7, 27],
'white' : [37, 39],
'grey' : [90, 39],
'black' : [30, 39],
'blue' : [34, 39],
'cyan' : [36, 39],
'green' : [32, 39],
'magenta' : [35, 39],
'red' : [31, 39],
'yellow' : [33, 39] };
var style =
{ 'special': 'cyan',
'number': 'blue',
'boolean': 'yellow',
'undefined': 'grey',
'null': 'bold',
'string': 'green',
'date': 'magenta',
// "name": intentionally not styling
'regexp': 'red' }[styleType];
if (style) {
return '\033[' + styles[style][0] + 'm' + str +
'\033[' + styles[style][1] + 'm';
} else {
return str;
}
};
if (! colors) {*/
stylize = function(str, styleType) { return str; };
//}
function format(value, recurseTimes) {
// Provide a hook for user-specified inspect functions.
// Check that value is an object with an inspect function on it
if (value && typeof value.inspect === 'function' &&
// Filter out the util module, it's inspect function is special
value !== exports && value.inspect !== exports.inspect &&
// Also filter out any prototype objects using the circular check.
!(value.constructor && value.constructor.prototype === value)) {
return value.inspect(recurseTimes);
}
// Primitive types cannot have properties
switch (typeof value) {
case 'undefined':
return stylize('undefined', 'undefined');
case 'string':
var simple = JSON.stringify(value).replace(/'/g, "\\'")
.replace(/\\"/g, '"')
.replace(/(^"|"$)/g, "'");
return stylize(simple, 'string');
case 'number':
return stylize('' + value, 'number');
case 'boolean':
return stylize('' + value, 'boolean');
}
// For some reason typeof null is "object", so special case here.
if (value === null) {
return stylize('null', 'null');
}
// Look up the keys of the object.
var visible_keys = Object.keys(value);
var keys = showHidden ? Object.getOwnPropertyNames(value) : visible_keys;
// Functions without properties can be shortcutted.
if (typeof value === 'function' && keys.length === 0) {
if (isRegExp(value)) {
return stylize('' + value, 'regexp');
} else {
var name = value.name ? ': ' + value.name : '';
return stylize('[Function' + name + ']', 'special');
}
}
// Dates without properties can be shortcutted
if (isDate(value) && keys.length === 0) {
return stylize(value.toUTCString(), 'date');
}
var base, type, braces;
// Determine the object type
if (isArray(value)) {
type = 'Array';
braces = ['[', ']'];
} else {
type = 'Object';
braces = ['{', '}'];
}
// Make functions say that they are functions
if (typeof value === 'function') {
var n = value.name ? ': ' + value.name : '';
base = (isRegExp(value)) ? ' ' + value : ' [Function' + n + ']';
} else {
base = '';
}
// Make dates with properties first say the date
if (isDate(value)) {
base = ' ' + value.toUTCString();
}
if (keys.length === 0) {
return braces[0] + base + braces[1];
}
if (recurseTimes < 0) {
if (isRegExp(value)) {
return stylize('' + value, 'regexp');
} else {
return stylize('[Object]', 'special');
}
}
seen.push(value);
var output = keys.map(function(key) {
var name, str;
if (value.__lookupGetter__) {
if (value.__lookupGetter__(key)) {
if (value.__lookupSetter__(key)) {
str = stylize('[Getter/Setter]', 'special');
} else {
str = stylize('[Getter]', 'special');
}
} else {
if (value.__lookupSetter__(key)) {
str = stylize('[Setter]', 'special');
}
}
}
if (visible_keys.indexOf(key) < 0) {
name = '[' + key + ']';
}
if (!str) {
if (seen.indexOf(value[key]) < 0) {
if (recurseTimes === null) {
str = format(value[key]);
} else {
str = format(value[key], recurseTimes - 1);
}
if (str.indexOf('\n') > -1) {
if (isArray(value)) {
str = str.split('\n').map(function(line) {
return ' ' + line;
}).join('\n').substr(2);
} else {
str = '\n' + str.split('\n').map(function(line) {
return ' ' + line;
}).join('\n');
}
}
} else {
str = stylize('[Circular]', 'special');
}
}
if (typeof name === 'undefined') {
if (type === 'Array' && key.match(/^\d+$/)) {
return str;
}
name = JSON.stringify('' + key);
if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
name = name.substr(1, name.length - 2);
name = stylize(name, 'name');
} else {
name = name.replace(/'/g, "\\'")
.replace(/\\"/g, '"')
.replace(/(^"|"$)/g, "'");
name = stylize(name, 'string');
}
}
return name + ': ' + str;
});
seen.pop();
var numLinesEst = 0;
var length = output.reduce(function(prev, cur) {
numLinesEst++;
if (cur.indexOf('\n') >= 0) numLinesEst++;
return prev + cur.length + 1;
}, 0);
if (length > (/*require('readline').columns ||*/ 50)) {
output = braces[0] +
(base === '' ? '' : base + '\n ') +
' ' +
output.join(',\n ') +
' ' +
braces[1];
} else {
output = braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
}
return output;
}
return format(obj, (typeof depth === 'undefined' ? 2 : depth));
};
function isArray(ar) {
return ar instanceof Array ||
Array.isArray(ar) ||
(ar && ar !== Object.prototype && isArray(ar.prototype));
}
function isRegExp(re) {
var s = '' + re;
return re instanceof RegExp || // easy case
// duck-type for context-switching evalcx case
typeof(re) === 'function' &&
re.constructor.name === 'RegExp' &&
re.compile &&
re.test &&
re.exec &&
s.match(/^\/.*\/[gim]{0,3}$/);
}
function isDate(d) {
if (d instanceof Date) return true;
if (typeof d !== 'object') return false;
var properties = Date.prototype && Object.getOwnPropertyNames(Date.prototype);
var proto = d.__proto__ && Object.getOwnPropertyNames(d.__proto__);
return JSON.stringify(proto) === JSON.stringify(properties);
}