103 lines
2.8 KiB
JavaScript
103 lines
2.8 KiB
JavaScript
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'use strict';
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const { parseSvg } = require('./parser.js');
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const { stringifySvg } = require('./stringifier.js');
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const { builtin } = require('./builtin.js');
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const { invokePlugins } = require('./svgo/plugins.js');
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const { encodeSVGDatauri } = require('./svgo/tools.js');
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const pluginsMap = {};
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for (const plugin of builtin) {
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pluginsMap[plugin.name] = plugin;
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}
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const resolvePluginConfig = (plugin) => {
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if (typeof plugin === 'string') {
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// resolve builtin plugin specified as string
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const builtinPlugin = pluginsMap[plugin];
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if (builtinPlugin == null) {
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throw Error(`Unknown builtin plugin "${plugin}" specified.`);
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}
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return {
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name: plugin,
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params: {},
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fn: builtinPlugin.fn,
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};
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}
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if (typeof plugin === 'object' && plugin != null) {
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if (plugin.name == null) {
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throw Error(`Plugin name should be specified`);
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}
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// use custom plugin implementation
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let fn = plugin.fn;
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if (fn == null) {
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// resolve builtin plugin implementation
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const builtinPlugin = pluginsMap[plugin.name];
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if (builtinPlugin == null) {
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throw Error(`Unknown builtin plugin "${plugin.name}" specified.`);
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}
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fn = builtinPlugin.fn;
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}
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return {
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name: plugin.name,
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params: plugin.params,
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fn,
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};
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}
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return null;
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};
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const optimize = (input, config) => {
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if (config == null) {
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config = {};
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}
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if (typeof config !== 'object') {
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throw Error('Config should be an object');
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}
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const maxPassCount = config.multipass ? 10 : 1;
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let prevResultSize = Number.POSITIVE_INFINITY;
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let output = '';
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const info = {};
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if (config.path != null) {
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info.path = config.path;
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}
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for (let i = 0; i < maxPassCount; i += 1) {
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info.multipassCount = i;
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const ast = parseSvg(input, config.path);
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const plugins = config.plugins || ['preset-default'];
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if (!Array.isArray(plugins)) {
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throw Error(
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'malformed config, `plugins` property must be an array.\nSee more info here: https://github.com/svg/svgo#configuration',
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);
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}
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const resolvedPlugins = plugins
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.filter((plugin) => plugin != null)
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.map(resolvePluginConfig);
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if (resolvedPlugins.length < plugins.length) {
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console.warn(
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'Warning: plugins list includes null or undefined elements, these will be ignored.',
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);
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}
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const globalOverrides = {};
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if (config.floatPrecision != null) {
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globalOverrides.floatPrecision = config.floatPrecision;
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}
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invokePlugins(ast, info, resolvedPlugins, null, globalOverrides);
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output = stringifySvg(ast, config.js2svg);
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if (output.length < prevResultSize) {
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input = output;
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prevResultSize = output.length;
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} else {
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break;
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}
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}
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if (config.datauri) {
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output = encodeSVGDatauri(output, config.datauri);
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}
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return {
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data: output,
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};
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};
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exports.optimize = optimize;
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