mini_require.js 5.7 KB

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  1. /* ***** BEGIN LICENSE BLOCK *****
  2. * Distributed under the BSD license:
  3. *
  4. * Copyright (c) 2010, Ajax.org B.V.
  5. * All rights reserved.
  6. *
  7. * Redistribution and use in source and binary forms, with or without
  8. * modification, are permitted provided that the following conditions are met:
  9. * * Redistributions of source code must retain the above copyright
  10. * notice, this list of conditions and the following disclaimer.
  11. * * Redistributions in binary form must reproduce the above copyright
  12. * notice, this list of conditions and the following disclaimer in the
  13. * documentation and/or other materials provided with the distribution.
  14. * * Neither the name of Ajax.org B.V. nor the
  15. * names of its contributors may be used to endorse or promote products
  16. * derived from this software without specific prior written permission.
  17. *
  18. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  19. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20. * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21. * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
  22. * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23. * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  25. * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27. * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28. *
  29. * ***** END LICENSE BLOCK ***** */
  30. /**
  31. * Define a module along with a payload
  32. * @param module a name for the payload
  33. * @param payload a function to call with (require, exports, module) params
  34. */
  35. (function() {
  36. var ACE_NAMESPACE = "";
  37. var global = (function() { return this; })();
  38. if (!global && typeof window != "undefined") global = window; // strict mode
  39. if (!ACE_NAMESPACE && typeof requirejs !== "undefined")
  40. return;
  41. var define = function(module, deps, payload) {
  42. if (typeof module !== "string") {
  43. if (define.original)
  44. define.original.apply(this, arguments);
  45. else {
  46. console.error("dropping module because define wasn\'t a string.");
  47. console.trace();
  48. }
  49. return;
  50. }
  51. if (arguments.length == 2)
  52. payload = deps;
  53. if (!define.modules[module]) {
  54. define.payloads[module] = payload;
  55. define.modules[module] = null;
  56. }
  57. };
  58. define.modules = {};
  59. define.payloads = {};
  60. /**
  61. * Get at functionality define()ed using the function above
  62. */
  63. var _require = function(parentId, module, callback) {
  64. if (typeof module === "string") {
  65. var payload = lookup(parentId, module);
  66. if (payload != undefined) {
  67. callback && callback();
  68. return payload;
  69. }
  70. } else if (Object.prototype.toString.call(module) === "[object Array]") {
  71. var params = [];
  72. for (var i = 0, l = module.length; i < l; ++i) {
  73. var dep = lookup(parentId, module[i]);
  74. if (dep == undefined && require.original)
  75. return;
  76. params.push(dep);
  77. }
  78. return callback && callback.apply(null, params) || true;
  79. }
  80. };
  81. var require = function(module, callback) {
  82. var packagedModule = _require("", module, callback);
  83. if (packagedModule == undefined && require.original)
  84. return require.original.apply(this, arguments);
  85. return packagedModule;
  86. };
  87. var normalizeModule = function(parentId, moduleName) {
  88. // normalize plugin requires
  89. if (moduleName.indexOf("!") !== -1) {
  90. var chunks = moduleName.split("!");
  91. return normalizeModule(parentId, chunks[0]) + "!" + normalizeModule(parentId, chunks[1]);
  92. }
  93. // normalize relative requires
  94. if (moduleName.charAt(0) == ".") {
  95. var base = parentId.split("/").slice(0, -1).join("/");
  96. moduleName = base + "/" + moduleName;
  97. while(moduleName.indexOf(".") !== -1 && previous != moduleName) {
  98. var previous = moduleName;
  99. moduleName = moduleName.replace(/\/\.\//, "/").replace(/[^\/]+\/\.\.\//, "");
  100. }
  101. }
  102. return moduleName;
  103. };
  104. /**
  105. * Internal function to lookup moduleNames and resolve them by calling the
  106. * definition function if needed.
  107. */
  108. var lookup = function(parentId, moduleName) {
  109. moduleName = normalizeModule(parentId, moduleName);
  110. var module = define.modules[moduleName];
  111. if (!module) {
  112. module = define.payloads[moduleName];
  113. if (typeof module === 'function') {
  114. var exports = {};
  115. var mod = {
  116. id: moduleName,
  117. uri: '',
  118. exports: exports,
  119. packaged: true
  120. };
  121. var req = function(module, callback) {
  122. return _require(moduleName, module, callback);
  123. };
  124. var returnValue = module(req, exports, mod);
  125. exports = returnValue || mod.exports;
  126. define.modules[moduleName] = exports;
  127. delete define.payloads[moduleName];
  128. }
  129. module = define.modules[moduleName] = exports || module;
  130. }
  131. return module;
  132. };
  133. function exportAce(ns) {
  134. var root = global;
  135. if (ns) {
  136. if (!global[ns])
  137. global[ns] = {};
  138. root = global[ns];
  139. }
  140. if (!root.define || !root.define.packaged) {
  141. define.original = root.define;
  142. root.define = define;
  143. root.define.packaged = true;
  144. }
  145. if (!root.require || !root.require.packaged) {
  146. require.original = root.require;
  147. root.require = require;
  148. root.require.packaged = true;
  149. }
  150. }
  151. exportAce(ACE_NAMESPACE);
  152. })();