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https://github.com/atlanticbiomedical/biomedjs.git
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Dobie Wollert
236
node_modules/eyes/lib/eyes.js
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vendored
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236
node_modules/eyes/lib/eyes.js
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//
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// Eyes.js - a customizable value inspector for Node.js
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//
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// usage:
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//
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// var inspect = require('eyes').inspector({styles: {all: 'magenta'}});
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// inspect(something); // inspect with the settings passed to `inspector`
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//
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// or
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//
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// var eyes = require('eyes');
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// eyes.inspect(something); // inspect with the default settings
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//
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var eyes = exports,
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stack = [];
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eyes.defaults = {
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styles: { // Styles applied to stdout
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all: 'cyan', // Overall style applied to everything
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label: 'underline', // Inspection labels, like 'array' in `array: [1, 2, 3]`
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other: 'inverted', // Objects which don't have a literal representation, such as functions
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key: 'bold', // The keys in object literals, like 'a' in `{a: 1}`
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special: 'grey', // null, undefined...
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string: 'green',
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number: 'magenta',
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bool: 'blue', // true false
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regexp: 'green', // /\d+/
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},
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pretty: true, // Indent object literals
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hideFunctions: false,
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showHidden: false,
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stream: process.stdout,
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maxLength: 2048 // Truncate output if longer
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};
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// Return a curried inspect() function, with the `options` argument filled in.
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eyes.inspector = function (options) {
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var that = this;
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return function (obj, label, opts) {
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return that.inspect.call(that, obj, label,
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merge(options || {}, opts || {}));
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};
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};
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// If we have a `stream` defined, use it to print a styled string,
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// if not, we just return the stringified object.
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eyes.inspect = function (obj, label, options) {
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options = merge(this.defaults, options || {});
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if (options.stream) {
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return this.print(stringify(obj, options), label, options);
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} else {
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return stringify(obj, options) + (options.styles ? '\033[39m' : '');
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}
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};
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// Output using the 'stream', and an optional label
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// Loop through `str`, and truncate it after `options.maxLength` has been reached.
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// Because escape sequences are, at this point embeded within
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// the output string, we can't measure the length of the string
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// in a useful way, without separating what is an escape sequence,
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// versus a printable character (`c`). So we resort to counting the
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// length manually.
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eyes.print = function (str, label, options) {
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for (var c = 0, i = 0; i < str.length; i++) {
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if (str.charAt(i) === '\033') { i += 4 } // `4` because '\033[25m'.length + 1 == 5
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else if (c === options.maxLength) {
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str = str.slice(0, i - 1) + '…';
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break;
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} else { c++ }
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}
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return options.stream.write.call(options.stream, (label ?
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this.stylize(label, options.styles.label, options.styles) + ': ' : '') +
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this.stylize(str, options.styles.all, options.styles) + '\033[0m' + "\n");
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};
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// Apply a style to a string, eventually,
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// I'd like this to support passing multiple
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// styles.
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eyes.stylize = function (str, style, styles) {
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var codes = {
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'bold' : [1, 22],
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'underline' : [4, 24],
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'inverse' : [7, 27],
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'cyan' : [36, 39],
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'magenta' : [35, 39],
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'blue' : [34, 39],
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'yellow' : [33, 39],
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'green' : [32, 39],
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'red' : [31, 39],
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'grey' : [90, 39]
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}, endCode;
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if (style && codes[style]) {
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endCode = (codes[style][1] === 39 && styles.all) ? codes[styles.all][0]
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: codes[style][1];
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return '\033[' + codes[style][0] + 'm' + str +
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'\033[' + endCode + 'm';
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} else { return str }
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};
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// Convert any object to a string, ready for output.
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// When an 'array' or an 'object' are encountered, they are
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// passed to specialized functions, which can then recursively call
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// stringify().
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function stringify(obj, options) {
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var that = this, stylize = function (str, style) {
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return eyes.stylize(str, options.styles[style], options.styles)
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}, index, result;
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if ((index = stack.indexOf(obj)) !== -1) {
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return stylize(new(Array)(stack.length - index + 1).join('.'), 'special');
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}
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stack.push(obj);
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result = (function (obj) {
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switch (typeOf(obj)) {
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case "string" : obj = stringifyString(obj.indexOf("'") === -1 ? "'" + obj + "'"
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: '"' + obj + '"');
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return stylize(obj, 'string');
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case "regexp" : return stylize('/' + obj.source + '/', 'regexp');
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case "number" : return stylize(obj + '', 'number');
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case "function" : return options.stream ? stylize("Function", 'other') : '[Function]';
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case "null" : return stylize("null", 'special');
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case "undefined": return stylize("undefined", 'special');
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case "boolean" : return stylize(obj + '', 'bool');
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case "date" : return stylize(obj.toUTCString());
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case "array" : return stringifyArray(obj, options, stack.length);
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case "object" : return stringifyObject(obj, options, stack.length);
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}
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})(obj);
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stack.pop();
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return result;
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};
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// Escape invisible characters in a string
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function stringifyString (str, options) {
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return str.replace(/\\/g, '\\\\')
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.replace(/\n/g, '\\n')
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.replace(/[\u0001-\u001F]/g, function (match) {
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return '\\0' + match[0].charCodeAt(0).toString(8);
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});
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}
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// Convert an array to a string, such as [1, 2, 3].
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// This function calls stringify() for each of the elements
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// in the array.
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function stringifyArray(ary, options, level) {
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var out = [];
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var pretty = options.pretty && (ary.length > 4 || ary.some(function (o) {
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return (o !== null && typeof(o) === 'object' && Object.keys(o).length > 0) ||
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(Array.isArray(o) && o.length > 0);
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}));
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var ws = pretty ? '\n' + new(Array)(level * 4 + 1).join(' ') : ' ';
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for (var i = 0; i < ary.length; i++) {
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out.push(stringify(ary[i], options));
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}
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if (out.length === 0) {
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return '[]';
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} else {
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return '[' + ws
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+ out.join(',' + (pretty ? ws : ' '))
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+ (pretty ? ws.slice(0, -4) : ws) +
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']';
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}
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};
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// Convert an object to a string, such as {a: 1}.
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// This function calls stringify() for each of its values,
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// and does not output functions or prototype values.
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function stringifyObject(obj, options, level) {
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var out = [];
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var pretty = options.pretty && (Object.keys(obj).length > 2 ||
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Object.keys(obj).some(function (k) { return typeof(obj[k]) === 'object' }));
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var ws = pretty ? '\n' + new(Array)(level * 4 + 1).join(' ') : ' ';
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var keys = options.showHidden ? Object.keys(obj) : Object.getOwnPropertyNames(obj);
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keys.forEach(function (k) {
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if (Object.prototype.hasOwnProperty.call(obj, k)
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&& !(obj[k] instanceof Function && options.hideFunctions)) {
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out.push(eyes.stylize(k, options.styles.key, options.styles) + ': ' +
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stringify(obj[k], options));
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}
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});
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if (out.length === 0) {
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return '{}';
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} else {
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return "{" + ws
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+ out.join(',' + (pretty ? ws : ' '))
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+ (pretty ? ws.slice(0, -4) : ws) +
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"}";
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}
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};
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// A better `typeof`
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function typeOf(value) {
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var s = typeof(value),
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types = [Object, Array, String, RegExp, Number, Function, Boolean, Date];
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if (s === 'object' || s === 'function') {
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if (value) {
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types.forEach(function (t) {
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if (value instanceof t) { s = t.name.toLowerCase() }
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});
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} else { s = 'null' }
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}
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return s;
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}
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function merge(/* variable args */) {
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var objs = Array.prototype.slice.call(arguments);
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var target = {};
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objs.forEach(function (o) {
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Object.keys(o).forEach(function (k) {
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if (k === 'styles') {
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if (! o.styles) {
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target.styles = false;
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} else {
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target.styles = {}
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for (var s in o.styles) {
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target.styles[s] = o.styles[s];
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}
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}
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} else {
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target[k] = o[k];
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}
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});
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});
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return target;
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}
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