406 lines
14 KiB
JavaScript
406 lines
14 KiB
JavaScript
/**
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* almond 0.2.5 Copyright (c) 2011-2012, The Dojo Foundation All Rights Reserved.
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* Available via the MIT or new BSD license.
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* see: http://github.com/jrburke/almond for details
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*/
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//Going sloppy to avoid 'use strict' string cost, but strict practices should
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//be followed.
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/*jslint sloppy: true */
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/*global setTimeout: false */
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var requirejs, require, define;
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(function (undef) {
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var main, req, makeMap, handlers,
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defined = {},
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waiting = {},
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config = {},
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defining = {},
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hasOwn = Object.prototype.hasOwnProperty,
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aps = [].slice;
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function hasProp(obj, prop) {
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return hasOwn.call(obj, prop);
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}
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/**
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* Given a relative module name, like ./something, normalize it to
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* a real name that can be mapped to a path.
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* @param {String} name the relative name
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* @param {String} baseName a real name that the name arg is relative
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* to.
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* @returns {String} normalized name
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*/
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function normalize(name, baseName) {
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var nameParts, nameSegment, mapValue, foundMap,
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foundI, foundStarMap, starI, i, j, part,
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baseParts = baseName && baseName.split("/"),
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map = config.map,
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starMap = (map && map['*']) || {};
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//Adjust any relative paths.
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if (name && name.charAt(0) === ".") {
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//If have a base name, try to normalize against it,
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//otherwise, assume it is a top-level require that will
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//be relative to baseUrl in the end.
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if (baseName) {
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//Convert baseName to array, and lop off the last part,
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//so that . matches that "directory" and not name of the baseName's
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//module. For instance, baseName of "one/two/three", maps to
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//"one/two/three.js", but we want the directory, "one/two" for
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//this normalization.
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baseParts = baseParts.slice(0, baseParts.length - 1);
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name = baseParts.concat(name.split("/"));
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//start trimDots
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for (i = 0; i < name.length; i += 1) {
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part = name[i];
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if (part === ".") {
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name.splice(i, 1);
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i -= 1;
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} else if (part === "..") {
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if (i === 1 && (name[2] === '..' || name[0] === '..')) {
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//End of the line. Keep at least one non-dot
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//path segment at the front so it can be mapped
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//correctly to disk. Otherwise, there is likely
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//no path mapping for a path starting with '..'.
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//This can still fail, but catches the most reasonable
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//uses of ..
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break;
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} else if (i > 0) {
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name.splice(i - 1, 2);
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i -= 2;
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}
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}
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}
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//end trimDots
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name = name.join("/");
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} else if (name.indexOf('./') === 0) {
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// No baseName, so this is ID is resolved relative
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// to baseUrl, pull off the leading dot.
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name = name.substring(2);
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}
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}
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//Apply map config if available.
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if ((baseParts || starMap) && map) {
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nameParts = name.split('/');
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for (i = nameParts.length; i > 0; i -= 1) {
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nameSegment = nameParts.slice(0, i).join("/");
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if (baseParts) {
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//Find the longest baseName segment match in the config.
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//So, do joins on the biggest to smallest lengths of baseParts.
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for (j = baseParts.length; j > 0; j -= 1) {
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mapValue = map[baseParts.slice(0, j).join('/')];
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//baseName segment has config, find if it has one for
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//this name.
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if (mapValue) {
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mapValue = mapValue[nameSegment];
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if (mapValue) {
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//Match, update name to the new value.
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foundMap = mapValue;
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foundI = i;
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break;
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}
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}
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}
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}
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if (foundMap) {
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break;
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}
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//Check for a star map match, but just hold on to it,
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//if there is a shorter segment match later in a matching
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//config, then favor over this star map.
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if (!foundStarMap && starMap && starMap[nameSegment]) {
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foundStarMap = starMap[nameSegment];
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starI = i;
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}
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}
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if (!foundMap && foundStarMap) {
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foundMap = foundStarMap;
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foundI = starI;
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}
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if (foundMap) {
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nameParts.splice(0, foundI, foundMap);
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name = nameParts.join('/');
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}
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}
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return name;
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}
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function makeRequire(relName, forceSync) {
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return function () {
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//A version of a require function that passes a moduleName
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//value for items that may need to
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//look up paths relative to the moduleName
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return req.apply(undef, aps.call(arguments, 0).concat([relName, forceSync]));
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};
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}
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function makeNormalize(relName) {
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return function (name) {
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return normalize(name, relName);
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};
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}
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function makeLoad(depName) {
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return function (value) {
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defined[depName] = value;
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};
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}
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function callDep(name) {
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if (hasProp(waiting, name)) {
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var args = waiting[name];
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delete waiting[name];
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defining[name] = true;
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main.apply(undef, args);
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}
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if (!hasProp(defined, name) && !hasProp(defining, name)) {
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throw new Error('No ' + name);
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}
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return defined[name];
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}
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//Turns a plugin!resource to [plugin, resource]
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//with the plugin being undefined if the name
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//did not have a plugin prefix.
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function splitPrefix(name) {
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var prefix,
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index = name ? name.indexOf('!') : -1;
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if (index > -1) {
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prefix = name.substring(0, index);
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name = name.substring(index + 1, name.length);
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}
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return [prefix, name];
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}
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/**
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* Makes a name map, normalizing the name, and using a plugin
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* for normalization if necessary. Grabs a ref to plugin
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* too, as an optimization.
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*/
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makeMap = function (name, relName) {
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var plugin,
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parts = splitPrefix(name),
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prefix = parts[0];
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name = parts[1];
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if (prefix) {
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prefix = normalize(prefix, relName);
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plugin = callDep(prefix);
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}
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//Normalize according
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if (prefix) {
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if (plugin && plugin.normalize) {
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name = plugin.normalize(name, makeNormalize(relName));
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} else {
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name = normalize(name, relName);
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}
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} else {
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name = normalize(name, relName);
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parts = splitPrefix(name);
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prefix = parts[0];
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name = parts[1];
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if (prefix) {
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plugin = callDep(prefix);
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}
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}
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//Using ridiculous property names for space reasons
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return {
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f: prefix ? prefix + '!' + name : name, //fullName
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n: name,
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pr: prefix,
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p: plugin
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};
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};
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function makeConfig(name) {
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return function () {
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return (config && config.config && config.config[name]) || {};
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};
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}
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handlers = {
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require: function (name) {
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return makeRequire(name);
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},
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exports: function (name) {
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var e = defined[name];
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if (typeof e !== 'undefined') {
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return e;
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} else {
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return (defined[name] = {});
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}
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},
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module: function (name) {
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return {
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id: name,
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uri: '',
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exports: defined[name],
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config: makeConfig(name)
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};
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}
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};
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main = function (name, deps, callback, relName) {
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var cjsModule, depName, ret, map, i,
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args = [],
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usingExports;
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//Use name if no relName
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relName = relName || name;
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//Call the callback to define the module, if necessary.
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if (typeof callback === 'function') {
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//Pull out the defined dependencies and pass the ordered
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//values to the callback.
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//Default to [require, exports, module] if no deps
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deps = !deps.length && callback.length ? ['require', 'exports', 'module'] : deps;
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for (i = 0; i < deps.length; i += 1) {
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map = makeMap(deps[i], relName);
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depName = map.f;
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//Fast path CommonJS standard dependencies.
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if (depName === "require") {
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args[i] = handlers.require(name);
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} else if (depName === "exports") {
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//CommonJS module spec 1.1
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args[i] = handlers.exports(name);
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usingExports = true;
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} else if (depName === "module") {
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//CommonJS module spec 1.1
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cjsModule = args[i] = handlers.module(name);
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} else if (hasProp(defined, depName) ||
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hasProp(waiting, depName) ||
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hasProp(defining, depName)) {
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args[i] = callDep(depName);
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} else if (map.p) {
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map.p.load(map.n, makeRequire(relName, true), makeLoad(depName), {});
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args[i] = defined[depName];
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} else {
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throw new Error(name + ' missing ' + depName);
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}
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}
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ret = callback.apply(defined[name], args);
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if (name) {
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//If setting exports via "module" is in play,
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//favor that over return value and exports. After that,
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//favor a non-undefined return value over exports use.
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if (cjsModule && cjsModule.exports !== undef &&
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cjsModule.exports !== defined[name]) {
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defined[name] = cjsModule.exports;
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} else if (ret !== undef || !usingExports) {
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//Use the return value from the function.
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defined[name] = ret;
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}
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}
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} else if (name) {
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//May just be an object definition for the module. Only
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//worry about defining if have a module name.
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defined[name] = callback;
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}
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};
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requirejs = require = req = function (deps, callback, relName, forceSync, alt) {
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if (typeof deps === "string") {
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if (handlers[deps]) {
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//callback in this case is really relName
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return handlers[deps](callback);
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}
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//Just return the module wanted. In this scenario, the
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//deps arg is the module name, and second arg (if passed)
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//is just the relName.
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//Normalize module name, if it contains . or ..
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return callDep(makeMap(deps, callback).f);
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} else if (!deps.splice) {
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//deps is a config object, not an array.
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config = deps;
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if (callback.splice) {
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//callback is an array, which means it is a dependency list.
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//Adjust args if there are dependencies
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deps = callback;
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callback = relName;
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relName = null;
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} else {
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deps = undef;
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}
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}
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//Support require(['a'])
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callback = callback || function () {};
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//If relName is a function, it is an errback handler,
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//so remove it.
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if (typeof relName === 'function') {
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relName = forceSync;
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forceSync = alt;
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}
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//Simulate async callback;
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if (forceSync) {
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main(undef, deps, callback, relName);
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} else {
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//Using a non-zero value because of concern for what old browsers
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//do, and latest browsers "upgrade" to 4 if lower value is used:
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//http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#dom-windowtimers-settimeout:
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//If want a value immediately, use require('id') instead -- something
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//that works in almond on the global level, but not guaranteed and
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//unlikely to work in other AMD implementations.
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setTimeout(function () {
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main(undef, deps, callback, relName);
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}, 4);
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}
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return req;
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};
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/**
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* Just drops the config on the floor, but returns req in case
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* the config return value is used.
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*/
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req.config = function (cfg) {
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config = cfg;
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if (config.deps) {
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req(config.deps, config.callback);
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}
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return req;
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};
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define = function (name, deps, callback) {
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//This module may not have dependencies
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if (!deps.splice) {
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//deps is not an array, so probably means
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//an object literal or factory function for
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//the value. Adjust args.
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callback = deps;
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deps = [];
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}
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if (!hasProp(defined, name) && !hasProp(waiting, name)) {
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waiting[name] = [name, deps, callback];
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}
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};
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define.amd = {
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jQuery: true
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};
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}());
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