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//----------------------------------------------------------------------------
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// Copyright (C) 2008-2012 The IPython Development Team
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//
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// Distributed under the terms of the BSD License. The full license is in
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// the file COPYING, distributed as part of this software.
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//----------------------------------------------------------------------------
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//============================================================================
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// Utilities
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//============================================================================
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IPython.namespace('IPython.utils');
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IPython.utils = (function (IPython) {
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"use strict";
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//============================================================================
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// Cross-browser RegEx Split
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//============================================================================
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// This code has been MODIFIED from the code licensed below to not replace the
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// default browser split. The license is reproduced here.
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// see http://blog.stevenlevithan.com/archives/cross-browser-split for more info:
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/*!
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* Cross-Browser Split 1.1.1
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* Copyright 2007-2012 Steven Levithan <stevenlevithan.com>
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* Available under the MIT License
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* ECMAScript compliant, uniform cross-browser split method
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*/
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/**
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* Splits a string into an array of strings using a regex or string
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* separator. Matches of the separator are not included in the result array.
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* However, if `separator` is a regex that contains capturing groups,
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* backreferences are spliced into the result each time `separator` is
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* matched. Fixes browser bugs compared to the native
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* `String.prototype.split` and can be used reliably cross-browser.
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* @param {String} str String to split.
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* @param {RegExp|String} separator Regex or string to use for separating
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* the string.
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* @param {Number} [limit] Maximum number of items to include in the result
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* array.
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* @returns {Array} Array of substrings.
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* @example
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*
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* // Basic use
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* regex_split('a b c d', ' ');
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* // -> ['a', 'b', 'c', 'd']
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*
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* // With limit
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* regex_split('a b c d', ' ', 2);
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* // -> ['a', 'b']
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*
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* // Backreferences in result array
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* regex_split('..word1 word2..', /([a-z]+)(\d+)/i);
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* // -> ['..', 'word', '1', ' ', 'word', '2', '..']
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*/
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var regex_split = function (str, separator, limit) {
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// If `separator` is not a regex, use `split`
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if (Object.prototype.toString.call(separator) !== "[object RegExp]") {
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return split.call(str, separator, limit);
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}
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var output = [],
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flags = (separator.ignoreCase ? "i" : "") +
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(separator.multiline ? "m" : "") +
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(separator.extended ? "x" : "") + // Proposed for ES6
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(separator.sticky ? "y" : ""), // Firefox 3+
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lastLastIndex = 0,
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// Make `global` and avoid `lastIndex` issues by working with a copy
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separator = new RegExp(separator.source, flags + "g"),
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separator2, match, lastIndex, lastLength;
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str += ""; // Type-convert
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var compliantExecNpcg = typeof(/()??/.exec("")[1]) === "undefined";
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if (!compliantExecNpcg) {
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// Doesn't need flags gy, but they don't hurt
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separator2 = new RegExp("^" + separator.source + "$(?!\\s)", flags);
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}
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/* Values for `limit`, per the spec:
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* If undefined: 4294967295 // Math.pow(2, 32) - 1
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* If 0, Infinity, or NaN: 0
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* If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;
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* If negative number: 4294967296 - Math.floor(Math.abs(limit))
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* If other: Type-convert, then use the above rules
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*/
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limit = typeof(limit) === "undefined" ?
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-1 >>> 0 : // Math.pow(2, 32) - 1
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limit >>> 0; // ToUint32(limit)
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while (match = separator.exec(str)) {
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// `separator.lastIndex` is not reliable cross-browser
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lastIndex = match.index + match[0].length;
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if (lastIndex > lastLastIndex) {
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output.push(str.slice(lastLastIndex, match.index));
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// Fix browsers whose `exec` methods don't consistently return `undefined` for
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// nonparticipating capturing groups
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if (!compliantExecNpcg && match.length > 1) {
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match[0].replace(separator2, function () {
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for (var i = 1; i < arguments.length - 2; i++) {
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if (typeof(arguments[i]) === "undefined") {
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match[i] = undefined;
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}
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}
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});
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}
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if (match.length > 1 && match.index < str.length) {
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Array.prototype.push.apply(output, match.slice(1));
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}
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lastLength = match[0].length;
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lastLastIndex = lastIndex;
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if (output.length >= limit) {
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break;
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}
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}
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if (separator.lastIndex === match.index) {
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separator.lastIndex++; // Avoid an infinite loop
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}
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}
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if (lastLastIndex === str.length) {
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if (lastLength || !separator.test("")) {
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output.push("");
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}
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} else {
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output.push(str.slice(lastLastIndex));
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}
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return output.length > limit ? output.slice(0, limit) : output;
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};
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//============================================================================
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// End contributed Cross-browser RegEx Split
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//============================================================================
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var uuid = function () {
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// http://www.ietf.org/rfc/rfc4122.txt
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var s = [];
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var hexDigits = "0123456789ABCDEF";
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for (var i = 0; i < 32; i++) {
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s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
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}
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s[12] = "4"; // bits 12-15 of the time_hi_and_version field to 0010
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s[16] = hexDigits.substr((s[16] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
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var uuid = s.join("");
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return uuid;
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};
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//Fix raw text to parse correctly in crazy XML
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function xmlencode(string) {
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return string.replace(/\&/g,'&'+'amp;')
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.replace(/</g,'&'+'lt;')
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.replace(/>/g,'&'+'gt;')
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.replace(/\'/g,'&'+'apos;')
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.replace(/\"/g,'&'+'quot;')
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.replace(/`/g,'&'+'#96;');
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}
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//Map from terminal commands to CSS classes
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var ansi_colormap = {
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"01":"ansibold",
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"30":"ansiblack",
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"31":"ansired",
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"32":"ansigreen",
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"33":"ansiyellow",
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"34":"ansiblue",
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"35":"ansipurple",
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"36":"ansicyan",
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"37":"ansigray",
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"40":"ansibgblack",
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"41":"ansibgred",
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"42":"ansibggreen",
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"43":"ansibgyellow",
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"44":"ansibgblue",
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"45":"ansibgpurple",
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"46":"ansibgcyan",
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"47":"ansibggray"
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};
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function _process_numbers(attrs, numbers) {
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// process ansi escapes
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var n = numbers.shift();
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if (ansi_colormap[n]) {
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if ( ! attrs["class"] ) {
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attrs["class"] = ansi_colormap[n];
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} else {
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attrs["class"] += " " + ansi_colormap[n];
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}
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} else if (n == "38" || n == "48") {
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// VT100 256 color or 24 bit RGB
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if (numbers.length < 2) {
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console.log("Not enough fields for VT100 color", numbers);
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return;
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}
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var index_or_rgb = numbers.shift();
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var r,g,b;
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if (index_or_rgb == "5") {
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// 256 color
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var idx = parseInt(numbers.shift());
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if (idx < 16) {
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// indexed ANSI
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// ignore bright / non-bright distinction
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idx = idx % 8;
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var ansiclass = ansi_colormap[n[0] + (idx % 8).toString()];
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if ( ! attrs["class"] ) {
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attrs["class"] = ansiclass;
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} else {
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attrs["class"] += " " + ansiclass;
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}
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return;
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} else if (idx < 232) {
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// 216 color 6x6x6 RGB
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idx = idx - 16;
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b = idx % 6;
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g = Math.floor(idx / 6) % 6;
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r = Math.floor(idx / 36) % 6;
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// convert to rgb
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r = (r * 51);
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g = (g * 51);
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b = (b * 51);
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} else {
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// grayscale
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idx = idx - 231;
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// it's 1-24 and should *not* include black or white,
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// so a 26 point scale
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r = g = b = Math.floor(idx * 256 / 26);
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}
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} else if (index_or_rgb == "2") {
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// Simple 24 bit RGB
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if (numbers.length > 3) {
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console.log("Not enough fields for RGB", numbers);
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return;
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}
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r = numbers.shift();
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g = numbers.shift();
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b = numbers.shift();
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} else {
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console.log("unrecognized control", numbers);
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return;
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}
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if (r !== undefined) {
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// apply the rgb color
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var line;
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if (n == "38") {
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line = "color: ";
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} else {
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line = "background-color: ";
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}
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line = line + "rgb(" + r + "," + g + "," + b + ");"
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if ( !attrs["style"] ) {
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attrs["style"] = line;
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} else {
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attrs["style"] += " " + line;
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}
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}
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}
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}
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function ansispan(str) {
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// ansispan function adapted from github.com/mmalecki/ansispan (MIT License)
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// regular ansi escapes (using the table above)
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return str.replace(/\033\[(0?[01]|22|39)?([;\d]+)?m/g, function(match, prefix, pattern) {
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if (!pattern) {
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// [(01|22|39|)m close spans
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return "</span>";
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}
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// consume sequence of color escapes
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var numbers = pattern.match(/\d+/g);
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var attrs = {};
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while (numbers.length > 0) {
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_process_numbers(attrs, numbers);
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}
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var span = "<span ";
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for (var attr in attrs) {
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var value = attrs[attr];
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span = span + " " + attr + '="' + attrs[attr] + '"';
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}
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return span + ">";
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});
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};
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// Transform ANSI color escape codes into HTML <span> tags with css
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// classes listed in the above ansi_colormap object. The actual color used
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// are set in the css file.
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function fixConsole(txt) {
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txt = xmlencode(txt);
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var re = /\033\[([\dA-Fa-f;]*?)m/;
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var opened = false;
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var cmds = [];
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var opener = "";
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var closer = "";
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// Strip all ANSI codes that are not color related. Matches
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// all ANSI codes that do not end with "m".
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var ignored_re = /(?=(\033\[[\d;=]*[a-ln-zA-Z]{1}))\1(?!m)/g;
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txt = txt.replace(ignored_re, "");
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// color ansi codes
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txt = ansispan(txt);
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return txt;
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}
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// Remove chunks that should be overridden by the effect of
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// carriage return characters
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function fixCarriageReturn(txt) {
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var tmp = txt;
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do {
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txt = tmp;
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tmp = txt.replace(/\r+\n/gm, '\n'); // \r followed by \n --> newline
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tmp = tmp.replace(/^.*\r+/gm, ''); // Other \r --> clear line
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} while (tmp.length < txt.length);
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return txt;
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}
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// Locate any URLs and convert them to a anchor tag
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function autoLinkUrls(txt) {
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return txt.replace(/(^|\s)(https?|ftp)(:[^'">\s]+)/gi,
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"$1<a target=\"_blank\" href=\"$2$3\">$2$3</a>");
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}
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// some keycodes that seem to be platform/browser independent
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var keycodes = {
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BACKSPACE: 8,
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TAB : 9,
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ENTER : 13,
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SHIFT : 16,
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CTRL : 17,
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CONTROL : 17,
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ALT : 18,
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CAPS_LOCK: 20,
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ESC : 27,
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SPACE : 32,
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PGUP : 33,
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PGDOWN : 34,
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END : 35,
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HOME : 36,
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LEFT_ARROW: 37,
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LEFTARROW: 37,
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LEFT : 37,
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UP_ARROW : 38,
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UPARROW : 38,
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UP : 38,
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RIGHT_ARROW:39,
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RIGHTARROW:39,
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RIGHT : 39,
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DOWN_ARROW: 40,
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DOWNARROW: 40,
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DOWN : 40,
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I : 73,
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M : 77,
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// all three of these keys may be COMMAND on OS X:
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LEFT_SUPER : 91,
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RIGHT_SUPER : 92,
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COMMAND : 93,
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};
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// trigger a key press event
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var press = function (key) {
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var key_press = $.Event('keydown', {which: key});
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$(document).trigger(key_press);
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}
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var press_up = function() { press(keycodes.UP); };
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var press_down = function() { press(keycodes.DOWN); };
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var press_ctrl_enter = function() {
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$(document).trigger($.Event('keydown', {which: keycodes.ENTER, ctrlKey: true}));
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};
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var press_shift_enter = function() {
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$(document).trigger($.Event('keydown', {which: keycodes.ENTER, shiftKey: true}));
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};
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// trigger the ctrl-m shortcut followed by one of our keys
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var press_ghetto = function(key) {
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$(document).trigger($.Event('keydown', {which: keycodes.M, ctrlKey: true}));
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press(key);
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};
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var points_to_pixels = function (points) {
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// A reasonably good way of converting between points and pixels.
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var test = $('<div style="display: none; width: 10000pt; padding:0; border:0;"></div>');
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$(body).append(test);
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var pixel_per_point = test.width()/10000;
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test.remove();
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return Math.floor(points*pixel_per_point);
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};
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var always_new = function (constructor) {
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// wrapper around contructor to avoid requiring `var a = new constructor()`
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// useful for passing constructors as callbacks,
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// not for programmer laziness.
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// from http://programmers.stackexchange.com/questions/118798
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return function () {
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var obj = Object.create(constructor.prototype);
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constructor.apply(obj, arguments);
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return obj;
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};
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};
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var url_path_join = function () {
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// join a sequence of url components with '/'
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var url = '';
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for (var i = 0; i < arguments.length; i++) {
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if (arguments[i] === '') {
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continue;
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}
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if (url.length > 0 && url[url.length-1] != '/') {
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url = url + '/' + arguments[i];
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} else {
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url = url + arguments[i];
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}
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}
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return url;
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};
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var splitext = function (filename) {
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// mimic Python os.path.splitext
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// Returns ['base', '.ext']
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var idx = filename.lastIndexOf('.');
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if (idx > 0) {
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return [filename.slice(0, idx), filename.slice(idx)];
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} else {
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return [filename, ''];
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}
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}
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// http://stackoverflow.com/questions/2400935/browser-detection-in-javascript
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var browser = (function() {
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var N= navigator.appName, ua= navigator.userAgent, tem;
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var M= ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
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if (M && (tem= ua.match(/version\/([\.\d]+)/i))!= null) M[2]= tem[1];
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M= M? [M[1], M[2]]: [N, navigator.appVersion,'-?'];
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return M;
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})();
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return {
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regex_split : regex_split,
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uuid : uuid,
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fixConsole : fixConsole,
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keycodes : keycodes,
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press : press,
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press_up : press_up,
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press_down : press_down,
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press_ctrl_enter : press_ctrl_enter,
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press_shift_enter : press_shift_enter,
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press_ghetto : press_ghetto,
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fixCarriageReturn : fixCarriageReturn,
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autoLinkUrls : autoLinkUrls,
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points_to_pixels : points_to_pixels,
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url_path_join : url_path_join,
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splitext : splitext,
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always_new : always_new,
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browser : browser
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};
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}(IPython));
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