345 lines
13 KiB
JavaScript
345 lines
13 KiB
JavaScript
var fs = require('fs');
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var path = require('path');
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var applySourceMaps = require('./apply-source-maps');
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var extractImportUrlAndMedia = require('./extract-import-url-and-media');
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var isAllowedResource = require('./is-allowed-resource');
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var loadOriginalSources = require('./load-original-sources');
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var normalizePath = require('./normalize-path');
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var rebase = require('./rebase');
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var rebaseLocalMap = require('./rebase-local-map');
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var rebaseRemoteMap = require('./rebase-remote-map');
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var restoreImport = require('./restore-import');
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var tokenize = require('../tokenizer/tokenize');
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var Token = require('../tokenizer/token');
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var Marker = require('../tokenizer/marker');
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var hasProtocol = require('../utils/has-protocol');
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var isImport = require('../utils/is-import');
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var isRemoteResource = require('../utils/is-remote-resource');
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var UNKNOWN_URI = 'uri:unknown';
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var FILE_RESOURCE_PROTOCOL = 'file://';
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function readSources(input, context, callback) {
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return doReadSources(input, context, function(tokens) {
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return applySourceMaps(tokens, context, function() {
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return loadOriginalSources(context, function() { return callback(tokens); });
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});
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});
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}
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function doReadSources(input, context, callback) {
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if (typeof input == 'string') {
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return fromString(input, context, callback);
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} if (Buffer.isBuffer(input)) {
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return fromString(input.toString(), context, callback);
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} if (Array.isArray(input)) {
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return fromArray(input, context, callback);
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} if (typeof input == 'object') {
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return fromHash(input, context, callback);
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}
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}
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function fromString(input, context, callback) {
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context.source = undefined;
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context.sourcesContent[undefined] = input;
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context.stats.originalSize += input.length;
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return fromStyles(input, context, { inline: context.options.inline }, callback);
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}
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function fromArray(input, context, callback) {
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var inputAsImports = input.reduce(function(accumulator, uriOrHash) {
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if (typeof uriOrHash === 'string') {
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return addStringSource(uriOrHash, accumulator);
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}
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return addHashSource(uriOrHash, context, accumulator);
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}, []);
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return fromStyles(inputAsImports.join(''), context, { inline: ['all'] }, callback);
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}
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function fromHash(input, context, callback) {
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var inputAsImports = addHashSource(input, context, []);
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return fromStyles(inputAsImports.join(''), context, { inline: ['all'] }, callback);
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}
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function addStringSource(input, imports) {
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imports.push(restoreAsImport(normalizeUri(input)));
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return imports;
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}
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function addHashSource(input, context, imports) {
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var uri;
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var normalizedUri;
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var source;
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for (uri in input) {
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source = input[uri];
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normalizedUri = normalizeUri(uri);
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imports.push(restoreAsImport(normalizedUri));
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context.sourcesContent[normalizedUri] = source.styles;
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if (source.sourceMap) {
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trackSourceMap(source.sourceMap, normalizedUri, context);
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}
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}
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return imports;
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}
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function normalizeUri(uri) {
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var currentPath = path.resolve('');
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var absoluteUri;
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var relativeToCurrentPath;
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var normalizedUri;
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if (isRemoteResource(uri)) {
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return uri;
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}
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absoluteUri = path.isAbsolute(uri)
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? uri
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: path.resolve(uri);
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relativeToCurrentPath = path.relative(currentPath, absoluteUri);
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normalizedUri = normalizePath(relativeToCurrentPath);
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return normalizedUri;
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}
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function trackSourceMap(sourceMap, uri, context) {
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var parsedMap = typeof sourceMap == 'string'
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? JSON.parse(sourceMap)
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: sourceMap;
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var rebasedMap = isRemoteResource(uri)
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? rebaseRemoteMap(parsedMap, uri)
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: rebaseLocalMap(parsedMap, uri || UNKNOWN_URI, context.options.rebaseTo);
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context.inputSourceMapTracker.track(uri, rebasedMap);
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}
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function restoreAsImport(uri) {
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return restoreImport('url(' + uri + ')', '') + Marker.SEMICOLON;
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}
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function fromStyles(styles, context, parentInlinerContext, callback) {
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var tokens;
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var rebaseConfig = {};
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if (!context.source) {
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rebaseConfig.fromBase = path.resolve('');
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rebaseConfig.toBase = context.options.rebaseTo;
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} else if (isRemoteResource(context.source)) {
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rebaseConfig.fromBase = context.source;
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rebaseConfig.toBase = context.source;
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} else if (path.isAbsolute(context.source)) {
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rebaseConfig.fromBase = path.dirname(context.source);
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rebaseConfig.toBase = context.options.rebaseTo;
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} else {
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rebaseConfig.fromBase = path.dirname(path.resolve(context.source));
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rebaseConfig.toBase = context.options.rebaseTo;
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}
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tokens = tokenize(styles, context);
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tokens = rebase(tokens, context.options.rebase, context.validator, rebaseConfig);
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return allowsAnyImports(parentInlinerContext.inline)
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? inline(tokens, context, parentInlinerContext, callback)
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: callback(tokens);
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}
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function allowsAnyImports(inline) {
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return !(inline.length == 1 && inline[0] == 'none');
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}
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function inline(tokens, externalContext, parentInlinerContext, callback) {
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var inlinerContext = {
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afterContent: false,
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callback: callback,
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errors: externalContext.errors,
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externalContext: externalContext,
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fetch: externalContext.options.fetch,
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inlinedStylesheets: parentInlinerContext.inlinedStylesheets || externalContext.inlinedStylesheets,
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inline: parentInlinerContext.inline,
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inlineRequest: externalContext.options.inlineRequest,
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inlineTimeout: externalContext.options.inlineTimeout,
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isRemote: parentInlinerContext.isRemote || false,
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localOnly: externalContext.localOnly,
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outputTokens: [],
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rebaseTo: externalContext.options.rebaseTo,
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sourceTokens: tokens,
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warnings: externalContext.warnings
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};
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return doInlineImports(inlinerContext);
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}
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function doInlineImports(inlinerContext) {
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var token;
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var i, l;
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for (i = 0, l = inlinerContext.sourceTokens.length; i < l; i++) {
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token = inlinerContext.sourceTokens[i];
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if (token[0] == Token.AT_RULE && isImport(token[1])) {
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inlinerContext.sourceTokens.splice(0, i);
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return inlineStylesheet(token, inlinerContext);
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} if (token[0] == Token.AT_RULE || token[0] == Token.COMMENT) {
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inlinerContext.outputTokens.push(token);
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} else {
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inlinerContext.outputTokens.push(token);
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inlinerContext.afterContent = true;
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}
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}
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inlinerContext.sourceTokens = [];
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return inlinerContext.callback(inlinerContext.outputTokens);
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}
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function inlineStylesheet(token, inlinerContext) {
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var uriAndMediaQuery = extractImportUrlAndMedia(token[1]);
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var uri = uriAndMediaQuery[0];
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var mediaQuery = uriAndMediaQuery[1];
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var metadata = token[2];
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return isRemoteResource(uri)
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? inlineRemoteStylesheet(uri, mediaQuery, metadata, inlinerContext)
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: inlineLocalStylesheet(uri, mediaQuery, metadata, inlinerContext);
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}
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function inlineRemoteStylesheet(uri, mediaQuery, metadata, inlinerContext) {
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var isAllowed = isAllowedResource(uri, true, inlinerContext.inline);
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var originalUri = uri;
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var isLoaded = uri in inlinerContext.externalContext.sourcesContent;
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var isRuntimeResource = !hasProtocol(uri);
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if (inlinerContext.inlinedStylesheets.indexOf(uri) > -1) {
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inlinerContext.warnings.push('Ignoring remote @import of "' + uri + '" as it has already been imported.');
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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} if (inlinerContext.localOnly && inlinerContext.afterContent) {
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inlinerContext.warnings.push('Ignoring remote @import of "' + uri + '" as no callback given and after other content.');
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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} if (isRuntimeResource) {
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inlinerContext.warnings.push('Skipping remote @import of "' + uri + '" as no protocol given.');
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inlinerContext.outputTokens = inlinerContext.outputTokens.concat(inlinerContext.sourceTokens.slice(0, 1));
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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} if (inlinerContext.localOnly && !isLoaded) {
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inlinerContext.warnings.push('Skipping remote @import of "' + uri + '" as no callback given.');
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inlinerContext.outputTokens = inlinerContext.outputTokens.concat(inlinerContext.sourceTokens.slice(0, 1));
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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} if (!isAllowed && inlinerContext.afterContent) {
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inlinerContext.warnings.push('Ignoring remote @import of "' + uri + '" as resource is not allowed and after other content.');
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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} if (!isAllowed) {
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inlinerContext.warnings.push('Skipping remote @import of "' + uri + '" as resource is not allowed.');
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inlinerContext.outputTokens = inlinerContext.outputTokens.concat(inlinerContext.sourceTokens.slice(0, 1));
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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}
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inlinerContext.inlinedStylesheets.push(uri);
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function whenLoaded(error, importedStyles) {
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if (error) {
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inlinerContext.errors.push('Broken @import declaration of "' + uri + '" - ' + error);
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return process.nextTick(function() {
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inlinerContext.outputTokens = inlinerContext.outputTokens.concat(inlinerContext.sourceTokens.slice(0, 1));
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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doInlineImports(inlinerContext);
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});
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}
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inlinerContext.inline = inlinerContext.externalContext.options.inline;
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inlinerContext.isRemote = true;
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inlinerContext.externalContext.source = originalUri;
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inlinerContext.externalContext.sourcesContent[uri] = importedStyles;
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inlinerContext.externalContext.stats.originalSize += importedStyles.length;
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return fromStyles(importedStyles, inlinerContext.externalContext, inlinerContext, function(importedTokens) {
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importedTokens = wrapInMedia(importedTokens, mediaQuery, metadata);
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inlinerContext.outputTokens = inlinerContext.outputTokens.concat(importedTokens);
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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});
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}
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return isLoaded
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? whenLoaded(null, inlinerContext.externalContext.sourcesContent[uri])
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: inlinerContext.fetch(uri, inlinerContext.inlineRequest, inlinerContext.inlineTimeout, whenLoaded);
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}
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function inlineLocalStylesheet(uri, mediaQuery, metadata, inlinerContext) {
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var protocolLessUri = uri.replace(FILE_RESOURCE_PROTOCOL, '');
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var currentPath = path.resolve('');
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var absoluteUri = path.isAbsolute(protocolLessUri)
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? path.resolve(currentPath, protocolLessUri[0] == '/' ? protocolLessUri.substring(1) : protocolLessUri)
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: path.resolve(inlinerContext.rebaseTo, protocolLessUri);
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var relativeToCurrentPath = path.relative(currentPath, absoluteUri);
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var importedStyles;
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var isAllowed = isAllowedResource(protocolLessUri, false, inlinerContext.inline);
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var normalizedPath = normalizePath(relativeToCurrentPath);
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var isLoaded = normalizedPath in inlinerContext.externalContext.sourcesContent;
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if (inlinerContext.inlinedStylesheets.indexOf(absoluteUri) > -1) {
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inlinerContext.warnings.push('Ignoring local @import of "' + protocolLessUri + '" as it has already been imported.');
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} else if (isAllowed && !isLoaded && (!fs.existsSync(absoluteUri) || !fs.statSync(absoluteUri).isFile())) {
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inlinerContext.errors.push('Ignoring local @import of "' + protocolLessUri + '" as resource is missing.');
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} else if (!isAllowed && inlinerContext.afterContent) {
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inlinerContext.warnings.push('Ignoring local @import of "' + protocolLessUri + '" as resource is not allowed and after other content.');
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} else if (inlinerContext.afterContent) {
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inlinerContext.warnings.push('Ignoring local @import of "' + protocolLessUri + '" as after other content.');
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} else if (!isAllowed) {
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inlinerContext.warnings.push('Skipping local @import of "' + protocolLessUri + '" as resource is not allowed.');
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inlinerContext.outputTokens = inlinerContext.outputTokens.concat(inlinerContext.sourceTokens.slice(0, 1));
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} else {
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importedStyles = isLoaded
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? inlinerContext.externalContext.sourcesContent[normalizedPath]
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: fs.readFileSync(absoluteUri, 'utf-8');
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if (importedStyles.charCodeAt(0) === 65279) {
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importedStyles = importedStyles.substring(1);
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}
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inlinerContext.inlinedStylesheets.push(absoluteUri);
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inlinerContext.inline = inlinerContext.externalContext.options.inline;
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inlinerContext.externalContext.source = normalizedPath;
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inlinerContext.externalContext.sourcesContent[normalizedPath] = importedStyles;
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inlinerContext.externalContext.stats.originalSize += importedStyles.length;
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return fromStyles(importedStyles, inlinerContext.externalContext, inlinerContext, function(importedTokens) {
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importedTokens = wrapInMedia(importedTokens, mediaQuery, metadata);
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inlinerContext.outputTokens = inlinerContext.outputTokens.concat(importedTokens);
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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});
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}
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inlinerContext.sourceTokens = inlinerContext.sourceTokens.slice(1);
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return doInlineImports(inlinerContext);
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}
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function wrapInMedia(tokens, mediaQuery, metadata) {
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if (mediaQuery) {
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return [[Token.NESTED_BLOCK, [[Token.NESTED_BLOCK_SCOPE, '@media ' + mediaQuery, metadata]], tokens]];
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}
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return tokens;
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}
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module.exports = readSources;
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