mirror of https://github.com/webpack/webpack.git
119 lines
3.3 KiB
JavaScript
119 lines
3.3 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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var Tapable = require("tapable");
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var ConcatSource = require("webpack-core/lib/ConcatSource");
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function Template(outputOptions) {
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Tapable.call(this);
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this.outputOptions = outputOptions || {};
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}
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module.exports = Template;
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Template.getFunctionContent = function(fn) {
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return fn.toString().replace(/^function\s?\(\)\s?\{\n?|\n?\}$/g, "").replace(/^\t/mg, "");
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};
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Template.toIdentifier = function(str) {
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if(typeof str !== "string") return "";
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return str.replace(/^[^a-zA-Z$_]/, "_").replace(/[^a-zA-Z0-9$_]/g, "_");
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};
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Template.prototype = Object.create(Tapable.prototype);
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Template.prototype.indent = function indent(str) {
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if(Array.isArray(str)) {
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return str.map(indent).join("\n");
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} else {
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str = str.trimRight();
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if(!str) return "";
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var ind = (str[0] === "\n" ? "" : "\t");
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return ind + str.replace(/\n([^\n])/g, "\n\t$1");
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}
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};
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Template.prototype.prefix = function(str, prefix) {
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if(Array.isArray(str)) {
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str = str.join("\n");
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}
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str = str.trim();
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if(!str) return "";
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var ind = (str[0] === "\n" ? "" : prefix);
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return ind + str.replace(/\n([^\n])/g, "\n" + prefix + "$1");
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};
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Template.prototype.asString = function(str) {
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if(Array.isArray(str)) {
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return str.join("\n");
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}
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return str;
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};
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Template.prototype.getModulesArrayBounds = function(modules) {
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if(modules.some(function(module) {
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return typeof module.id !== "number";
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}))
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return false;
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var maxId = -Infinity;
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var minId = Infinity;
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modules.forEach(function(module) {
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if(maxId < module.id) maxId = module.id;
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if(minId > module.id) minId = module.id;
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});
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if(minId < 16 + ("" + minId).length) {
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// add minId x ',' instead of 'Array(minId).concat(...)'
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minId = 0;
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}
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var objectOverhead = modules.map(function(module) {
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var idLength = (module.id + "").length;
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return idLength + 2;
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}).reduce(function(a, b) {
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return a + b;
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}, -1);
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var arrayOverhead = minId === 0 ? maxId : 16 + ("" + minId).length + maxId;
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return arrayOverhead < objectOverhead ? [minId, maxId] : false;
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};
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Template.prototype.renderChunkModules = function(chunk, moduleTemplate, dependencyTemplates, prefix) {
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if(!prefix) prefix = "";
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var source = new ConcatSource();
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if(chunk.modules.length === 0) {
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source.add("[]");
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return source;
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}
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var bounds = this.getModulesArrayBounds(chunk.modules);
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if(bounds) {
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// Render a spare array
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var minId = bounds[0];
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var maxId = bounds[1];
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if(minId !== 0) source.add("Array(" + minId + ").concat(");
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source.add("[\n");
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var modules = {};
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chunk.modules.forEach(function(module) {
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modules[module.id] = module;
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});
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for(var idx = minId; idx <= maxId; idx++) {
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var module = modules[idx];
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if(idx !== minId) source.add(",\n");
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source.add("/* " + idx + " */");
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if(module) {
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source.add("\n");
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source.add(moduleTemplate.render(module, dependencyTemplates, chunk));
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}
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}
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source.add("\n" + prefix + "]");
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if(minId !== 0) source.add(")");
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} else {
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// Render an object
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source.add("{\n");
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chunk.modules.forEach(function(module, idx) {
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if(idx !== 0) source.add(",\n");
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source.add("\n/***/ " + JSON.stringify(module.id) + ":\n");
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source.add(moduleTemplate.render(module, dependencyTemplates, chunk));
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});
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source.add("\n\n" + prefix + "}");
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}
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return source;
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};
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