369 lines
7.9 KiB
JavaScript
369 lines
7.9 KiB
JavaScript
/*
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* @Author : l.w.kampfer@gmail.com
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*/
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(function(global) {
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var COMPILED = false;
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var kampfer = {};
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kampfer.global = global;
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kampfer.basePath = '';
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kampfer.implicitNamespaces = {};
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kampfer.isProvided = function(name) {
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return !kampfer.implicitNamespaces[name] && !!kampfer.getPropertyByName(name);
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};
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kampfer.getPropertyByName = function( name, obj ) {
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var namespace = name.split('.'),
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cur = obj || kampfer;
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for( var part; (part = namespace.shift()); ) {
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if( kampfer.isDefAndNotNull( cur[part] ) ) {
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cur = cur[part];
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} else {
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return null;
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}
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}
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return cur;
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};
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kampfer.exportPath = function(name, value, objectToExportTo) {
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var cur = objectToExportTo || kampfer.global,
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namespace = name.split('.');
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for( var part; (part = namespace.shift()); ) {
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if( !namespace.length && kampfer.isDefAndNotNull(value) ) {
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cur[part] = value;
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} else if( cur[part] ) {
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cur = cur[part];
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} else {
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cur = cur[part] = {};
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}
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}
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};
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kampfer.provide = function(name) {
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//if(!COMPILED) {
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if( kampfer.isProvided(name) ) {
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throw Error('Namespace "' + name + '" already declared.');
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}
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delete kampfer.implicitNamespaces[name];
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var namespace = name;
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while( (namespace = namespace.substring( 0, namespace.lastIndexOf('.') )) ) {
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if( kampfer.getPropertyByName(namespace) ) {
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break;
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} else {
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kampfer.implicitNamespaces[namespace] = true;
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}
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}
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//}
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kampfer.exportPath(name, null, kampfer);
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};
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kampfer.require = function(name) {
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if( !COMPILED ) {
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if ( !name || kampfer.isProvided(name) ) {
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return;
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}
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var path = kampfer._getPathFromDeps(name);
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if (path) {
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kampfer._included[path] = true;
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kampfer._writeScripts();
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}
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}
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};
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kampfer.addDependency = function( path, provides, requires ) {
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if( !COMPILED ) {
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var provide, require, deps;
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path = path.replace(/\\/g, '/');
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deps = kampfer._dependencies;
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for( var i = 0; (provide = provides[i]); i++) {
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deps.nameToPath[provide] = path;
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if (!(path in deps.pathToNames)) {
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deps.pathToNames[path] = {};
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}
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deps.pathToNames[path][provide] = true;
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}
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for( var j = 0; (require = requires[j]); j++) {
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if (!(path in deps.requires)) {
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deps.requires[path] = {};
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}
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deps.requires[path][require] = true;
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}
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}
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};
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if(!COMPILED) {
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kampfer._inHtmlDocument = function() {
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var doc = kampfer.global.document;
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return typeof doc != 'undefined' && 'write' in doc;
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// XULDocument misses write.
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};
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kampfer._getPathFromDeps = function(name) {
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if( name in kampfer._dependencies.nameToPath ) {
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return kampfer._dependencies.nameToPath[name];
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} else {
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return null;
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}
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};
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kampfer._importScript = function(src) {
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var _importScript = kampfer._writeScriptTag;
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if(!kampfer._dependencies.written[src] && _importScript(src)) {
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kampfer._dependencies.written[src] = true;
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}
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};
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kampfer._writeScripts = function() {
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var scripts = [],
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seenScript = {},
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deps = kampfer._dependencies;
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function visitNode(path) {
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if( path in deps.written ) {
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return;
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}
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if( path in deps.visited ) {
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if( !(path in seenScript) ) {
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seenScript[path] = true;
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scripts.push(path);
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}
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return;
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}
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deps.visited[path] = true;
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if (path in deps.requires) {
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for (var requireName in deps.requires[path]) {
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if (!kampfer.isProvided(requireName)) {
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if (requireName in deps.nameToPath) {
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visitNode(deps.nameToPath[requireName]);
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} else {
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throw Error('Undefined nameToPath for ' + requireName + ' in ' + path);
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}
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}
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}
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}
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if (!(path in seenScript)) {
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seenScript[path] = true;
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scripts.push(path);
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}
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}
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for( var path in kampfer._included ) {
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if( !deps.written[path] ) {
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visitNode(path);
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}
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}
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for( var i = 0; i < scripts.length; i++ ) {
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if ( scripts[i] ) {
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kampfer._importScript( kampfer.basePath + scripts[i] );
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} else {
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throw Error('Undefined script input');
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}
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}
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};
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kampfer._writeScriptTag = function(src) {
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if( kampfer._inHtmlDocument() ) {
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var doc = kampfer.global.document;
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doc.write('<script type="text/javascript" src="' + src + '"></' + 'script>');
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return true;
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} else {
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return false;
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}
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};
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kampfer._findBasePath = function() {
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if( !kampfer._inHtmlDocument() ) {
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return;
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}
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var doc = kampfer.global.document,
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scripts = doc.getElementsByTagName('script');
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for(var i = scripts.length - 1; i >= 0; --i) {
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var src = scripts[i].src,
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qmark = src.lastIndexOf('?'),
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l = (qmark === -1 ? src.length : qmark);
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if (src.substr(l - 7, 7) == 'base.js') {
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kampfer.basePath = src.substr(0, l - 7);
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return;
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}
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}
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};
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kampfer._dependencies = {
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pathToNames: {}, // 1 to many
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nameToPath: {}, // 1 to 1
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requires: {}, // 1 to many
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visited: {}, // 避免在拓扑排序时循环访问同一个节点。访问过的节点将保存在这里
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written: {} // 记录已经被加载到页面的js文件名
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};
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kampfer._included = {};
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//寻找js默认路径（即base.js的路径）
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kampfer._findBasePath();
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//加载依赖关系记录
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kampfer._importScript( kampfer.basePath + 'deps.js' );
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}
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kampfer.isDef = function(val) {
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return val !== undefined;
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};
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kampfer.isDefAndNotNull = function(val) {
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return val != null;
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};
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var _toString = Object.prototype.toString;
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kampfer.type = function(value) {
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return value == null ?
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String(value) :
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_class2type[ _toString.call(value) ] || 'object';
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};
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kampfer.isArray = function(val) {
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return kampfer.type(val) === 'array';
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};
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kampfer.isObject = function(val) {
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return kampfer.type(val) === 'object';
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};
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kampfer.isEmptyObject = function(val) {
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if( kampfer.type(val) !== 'object' ) {
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return;
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}
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for( var name in val ) {
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return false;
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}
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return true;
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};
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kampfer.isWindow = function(obj) {
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return !!obj && obj == obj.window;
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};
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kampfer.each = function( array, fn, thisObj ) {
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for( var i = 0, len = (array && array.length) || 0; i < len; ++i ) {
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if( i in array ) {
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fn.call( thisObj || kampfer.global, i, array[i], array );
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}
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}
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};
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kampfer.extend = function() {
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var src, target, name, len, i, deep, copyFrom, copyTo, clone;
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i = 1;
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len = arguments.length;
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deep = false;
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target = arguments[0] || {};
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if( typeof target === 'boolean' ) {
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deep = target;
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i = 2;
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target = arguments[1] || {};
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}
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if( i === len ) {
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target = this;
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--i;
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}
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for( ; i < len; i++ ) {
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src = arguments[i];
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if( src !== null ) {
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for( name in src ) {
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copyFrom = src[name];
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copyTo = target[name];
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if( copyTo === copyFrom ) {
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continue;
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}
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if( deep && copyFrom && ( kampfer.isArray(copyFrom) ||
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kampfer.isObject(copyFrom) ) ) {
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if( kampfer.isArray(copyFrom) ) {
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clone = copyTo && kampfer.isArray(copyTo) ? copyTo : [];
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} else if( kampfer.isObject(copyFrom) ) {
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clone = copyTo && kampfer.isObject(copyTo) ? copyTo : {};
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}
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target[name] = kampfer.extend( deep, clone, copyFrom );
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} else if( copyFrom !== undefined ) {
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target[name] = copyFrom;
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}
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}
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}
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}
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return target;
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};
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kampfer.emptyFn = function() {};
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kampfer.now = function() {
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return +new Date();
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};
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kampfer.expando = 'kampfer' + kampfer.now();
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var _class2type = {};
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kampfer.each( "Boolean Number String Function Array Date RegExp Object".split(" "), function(i, name) {
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_class2type[ "[object " + name + "]" ] = name.toLowerCase();
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});
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if( kampfer.type( kampfer.global.kampfer ) != 'undefined' ) {
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kampfer._kampfer = kampfer.global.kampfer;
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}
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if( kampfer.type( kampfer.global.k ) != 'undefined' ) {
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kampfer._k = kampfer.global.k;
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}
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kampfer.global.kampfer = kampfer.global.k = kampfer;
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})( (typeof exports !== 'undefined') ? exports : this ); |