145 lines
3.9 KiB
JavaScript
145 lines
3.9 KiB
JavaScript
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function getGlobalValue(exports) {
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if (typeof exports == 'string')
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return readMemberExpression(exports, __global);
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if (!(exports instanceof Array))
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throw new Error('Global exports must be a string or array.');
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var globalValue = {};
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var first = true;
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for (var i = 0; i < exports.length; i++) {
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var val = readMemberExpression(exports[i], __global);
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if (first) {
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globalValue['default'] = val;
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first = false;
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}
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globalValue[exports[i].split('.').pop()] = val;
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}
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return globalValue;
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}
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hook('reduceRegister_', function(reduceRegister) {
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return function(load, register) {
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if (register || !load.metadata.exports)
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return reduceRegister.call(this, load, register);
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load.metadata.format = 'global';
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var entry = load.metadata.entry = createEntry();
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entry.deps = load.metadata.deps;
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var globalValue = getGlobalValue(load.metadata.exports);
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entry.execute = function() {
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return globalValue;
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};
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};
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});
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hookConstructor(function(constructor) {
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return function() {
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var loader = this;
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constructor.call(loader);
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var hasOwnProperty = Object.prototype.hasOwnProperty;
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// bare minimum ignores
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var ignoredGlobalProps = ['_g', 'sessionStorage', 'localStorage', 'clipboardData', 'frames', 'frameElement', 'external',
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'mozAnimationStartTime', 'webkitStorageInfo', 'webkitIndexedDB', 'mozInnerScreenY', 'mozInnerScreenX'];
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var globalSnapshot;
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function forEachGlobal(callback) {
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if (Object.keys)
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Object.keys(__global).forEach(callback);
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else
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for (var g in __global) {
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if (!hasOwnProperty.call(__global, g))
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continue;
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callback(g);
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}
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}
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function forEachGlobalValue(callback) {
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forEachGlobal(function(globalName) {
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if (indexOf.call(ignoredGlobalProps, globalName) != -1)
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return;
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try {
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var value = __global[globalName];
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}
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catch (e) {
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ignoredGlobalProps.push(globalName);
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}
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callback(globalName, value);
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});
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}
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loader.set('@@global-helpers', loader.newModule({
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prepareGlobal: function(moduleName, exports, globals) {
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// disable module detection
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var curDefine = __global.define;
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__global.define = undefined;
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// set globals
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var oldGlobals;
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if (globals) {
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oldGlobals = {};
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for (var g in globals) {
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oldGlobals[g] = __global[g];
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__global[g] = globals[g];
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}
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}
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// store a complete copy of the global object in order to detect changes
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if (!exports) {
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globalSnapshot = {};
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forEachGlobalValue(function(name, value) {
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globalSnapshot[name] = value;
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});
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}
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// return function to retrieve global
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return function() {
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var globalValue;
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if (exports) {
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globalValue = getGlobalValue(exports);
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}
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else {
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globalValue = {};
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var singleGlobal;
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var multipleExports;
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forEachGlobalValue(function(name, value) {
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if (globalSnapshot[name] === value)
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return;
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if (typeof value == 'undefined')
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return;
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globalValue[name] = value;
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if (typeof singleGlobal != 'undefined') {
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if (!multipleExports && singleGlobal !== value)
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multipleExports = true;
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}
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else {
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singleGlobal = value;
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}
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});
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globalValue = multipleExports ? globalValue : singleGlobal;
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}
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// revert globals
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if (oldGlobals) {
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for (var g in oldGlobals)
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__global[g] = oldGlobals[g];
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}
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__global.define = curDefine;
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return globalValue;
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};
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}
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}));
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};
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});
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