302 lines
9.7 KiB
JavaScript
302 lines
9.7 KiB
JavaScript
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/** vim: et:ts=4:sw=4:sts=4
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* @license amdefine 1.0.1 Copyright (c) 2011-2016, 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/amdefine for details
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*/
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/*jslint node: true */
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/*global module, process */
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'use strict';
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/**
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* Creates a define for node.
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* @param {Object} module the "module" object that is defined by Node for the
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* current module.
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* @param {Function} [requireFn]. Node's require function for the current module.
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* It only needs to be passed in Node versions before 0.5, when module.require
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* did not exist.
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* @returns {Function} a define function that is usable for the current node
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* module.
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*/
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function amdefine(module, requireFn) {
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'use strict';
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var defineCache = {},
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loaderCache = {},
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alreadyCalled = false,
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path = require('path'),
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makeRequire, stringRequire;
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/**
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* Trims the . and .. from an array of path segments.
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* It will keep a leading path segment if a .. will become
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* the first path segment, to help with module name lookups,
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* which act like paths, but can be remapped. But the end result,
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* all paths that use this function should look normalized.
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* NOTE: this method MODIFIES the input array.
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* @param {Array} ary the array of path segments.
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*/
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function trimDots(ary) {
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var i, part;
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for (i = 0; ary[i]; i+= 1) {
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part = ary[i];
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if (part === '.') {
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ary.splice(i, 1);
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i -= 1;
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} else if (part === '..') {
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if (i === 1 && (ary[2] === '..' || ary[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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ary.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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}
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function normalize(name, baseName) {
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var baseParts;
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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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baseParts = baseName.split('/');
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baseParts = baseParts.slice(0, baseParts.length - 1);
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baseParts = baseParts.concat(name.split('/'));
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trimDots(baseParts);
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name = baseParts.join('/');
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}
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}
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return name;
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}
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/**
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* Create the normalize() function passed to a loader plugin's
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* normalize method.
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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(id) {
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function load(value) {
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loaderCache[id] = value;
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}
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load.fromText = function (id, text) {
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//This one is difficult because the text can/probably uses
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//define, and any relative paths and requires should be relative
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//to that id was it would be found on disk. But this would require
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//bootstrapping a module/require fairly deeply from node core.
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//Not sure how best to go about that yet.
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throw new Error('amdefine does not implement load.fromText');
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};
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return load;
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}
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makeRequire = function (systemRequire, exports, module, relId) {
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function amdRequire(deps, callback) {
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if (typeof deps === 'string') {
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//Synchronous, single module require('')
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return stringRequire(systemRequire, exports, module, deps, relId);
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} else {
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//Array of dependencies with a callback.
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//Convert the dependencies to modules.
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deps = deps.map(function (depName) {
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return stringRequire(systemRequire, exports, module, depName, relId);
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});
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//Wait for next tick to call back the require call.
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if (callback) {
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process.nextTick(function () {
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callback.apply(null, deps);
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});
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}
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}
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}
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amdRequire.toUrl = function (filePath) {
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if (filePath.indexOf('.') === 0) {
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return normalize(filePath, path.dirname(module.filename));
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} else {
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return filePath;
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}
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};
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return amdRequire;
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};
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//Favor explicit value, passed in if the module wants to support Node 0.4.
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requireFn = requireFn || function req() {
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return module.require.apply(module, arguments);
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};
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function runFactory(id, deps, factory) {
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var r, e, m, result;
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if (id) {
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e = loaderCache[id] = {};
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m = {
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id: id,
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uri: __filename,
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exports: e
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};
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r = makeRequire(requireFn, e, m, id);
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} else {
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//Only support one define call per file
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if (alreadyCalled) {
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throw new Error('amdefine with no module ID cannot be called more than once per file.');
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}
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alreadyCalled = true;
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//Use the real variables from node
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//Use module.exports for exports, since
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//the exports in here is amdefine exports.
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e = module.exports;
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m = module;
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r = makeRequire(requireFn, e, m, module.id);
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}
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//If there are dependencies, they are strings, so need
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//to convert them to dependency values.
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if (deps) {
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deps = deps.map(function (depName) {
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return r(depName);
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});
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}
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//Call the factory with the right dependencies.
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if (typeof factory === 'function') {
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result = factory.apply(m.exports, deps);
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} else {
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result = factory;
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}
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if (result !== undefined) {
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m.exports = result;
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if (id) {
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loaderCache[id] = m.exports;
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}
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}
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}
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stringRequire = function (systemRequire, exports, module, id, relId) {
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//Split the ID by a ! so that
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var index = id.indexOf('!'),
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originalId = id,
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prefix, plugin;
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if (index === -1) {
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id = normalize(id, relId);
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//Straight module lookup. If it is one of the special dependencies,
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//deal with it, otherwise, delegate to node.
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if (id === 'require') {
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return makeRequire(systemRequire, exports, module, relId);
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} else if (id === 'exports') {
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return exports;
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} else if (id === 'module') {
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return module;
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} else if (loaderCache.hasOwnProperty(id)) {
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return loaderCache[id];
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} else if (defineCache[id]) {
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runFactory.apply(null, defineCache[id]);
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return loaderCache[id];
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} else {
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if(systemRequire) {
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return systemRequire(originalId);
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} else {
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throw new Error('No module with ID: ' + id);
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}
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}
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} else {
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//There is a plugin in play.
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prefix = id.substring(0, index);
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id = id.substring(index + 1, id.length);
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plugin = stringRequire(systemRequire, exports, module, prefix, relId);
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if (plugin.normalize) {
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id = plugin.normalize(id, makeNormalize(relId));
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} else {
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//Normalize the ID normally.
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id = normalize(id, relId);
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}
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if (loaderCache[id]) {
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return loaderCache[id];
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} else {
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plugin.load(id, makeRequire(systemRequire, exports, module, relId), makeLoad(id), {});
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return loaderCache[id];
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}
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}
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};
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//Create a define function specific to the module asking for amdefine.
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function define(id, deps, factory) {
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if (Array.isArray(id)) {
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factory = deps;
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deps = id;
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id = undefined;
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} else if (typeof id !== 'string') {
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factory = id;
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id = deps = undefined;
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}
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if (deps && !Array.isArray(deps)) {
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factory = deps;
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deps = undefined;
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}
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if (!deps) {
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deps = ['require', 'exports', 'module'];
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}
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//Set up properties for this module. If an ID, then use
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//internal cache. If no ID, then use the external variables
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//for this node module.
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if (id) {
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//Put the module in deep freeze until there is a
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//require call for it.
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defineCache[id] = [id, deps, factory];
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} else {
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runFactory(id, deps, factory);
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}
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}
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//define.require, which has access to all the values in the
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//cache. Useful for AMD modules that all have IDs in the file,
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//but need to finally export a value to node based on one of those
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//IDs.
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define.require = function (id) {
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if (loaderCache[id]) {
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return loaderCache[id];
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}
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if (defineCache[id]) {
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runFactory.apply(null, defineCache[id]);
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return loaderCache[id];
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}
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};
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define.amd = {};
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return define;
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}
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module.exports = amdefine;
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