98 lines
2.8 KiB
JavaScript
98 lines
2.8 KiB
JavaScript
/*\
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title: $:/boot/bootprefix.js
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type: application/javascript
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This file sets up the globals that need to be available when JavaScript modules are executed in the browser. The overall sequence is:
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# BootPrefix.js
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# <module definitions>
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# Boot.js
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See Boot.js for further details of the boot process.
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\*/
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var _bootprefix = (function($tw) {
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"use strict";
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$tw = $tw || {browser: typeof(window) !== "undefined" ? {} : null};
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/*
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Information about each module is kept in an object with these members:
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moduleType: type of module
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definition: object, function or string defining the module; see below
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exports: exports of the module, filled in after execution
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The `definition` can be of several types:
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* An object can be used to directly specify the exports of the module
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* A function with the arguments `module,require,exports` that returns `exports`
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* A string function body with the same arguments
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Each moduleInfo object is stored in two hashmaps: $tw.modules.titles and $tw.modules.types. The first is indexed by title and the second is indexed by type and then title
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*/
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$tw.modules = {
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titles: {}, // hashmap by module name of moduleInfo
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types: {} // hashmap by module type and then name of moduleInfo
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};
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/*
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Define a JavaScript tiddler module for later execution
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moduleName: name of module being defined
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moduleType: type of module
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definition: module definition; see discussion above
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*/
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$tw.modules.define = function(moduleName,moduleType,definition) {
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// Create the moduleInfo
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var moduleInfo = {
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moduleType: moduleType,
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definition: definition,
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exports: undefined
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};
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// If the definition is already an object we can use it as the exports
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if(typeof moduleInfo.definition === "object") {
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moduleInfo.exports = definition;
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}
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// Store the module in the titles hashmap
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if(Object.prototype.hasOwnProperty.call($tw.modules.titles,moduleName)) {
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console.log("Warning: Redefined module - " + moduleName);
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}
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$tw.modules.titles[moduleName] = moduleInfo;
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// Store the module in the types hashmap
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if(!Object.prototype.hasOwnProperty.call($tw.modules.types,moduleType)) {
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$tw.modules.types[moduleType] = {};
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}
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if(Object.prototype.hasOwnProperty.call($tw.modules.types[moduleType],moduleName)) {
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console.log("Warning: Redefined module - " + moduleName);
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}
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$tw.modules.types[moduleType][moduleName] = moduleInfo;
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};
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/*
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External JavaScript can populate this array before calling boot.js in order to preload tiddlers
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*/
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$tw.preloadTiddlers = $tw.preloadTiddlers || [];
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/*
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Convenience function for pushing a tiddler onto the preloading array
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*/
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$tw.preloadTiddler = function(fields) {
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$tw.preloadTiddlers.push(fields);
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};
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return $tw
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});
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if(typeof(exports) === "undefined") {
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// Set up $tw global for the browser
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window.$tw = _bootprefix();
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} else {
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// Export functionality as a module
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exports.bootprefix = _bootprefix;
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}
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