464 lines
20 KiB
JavaScript
464 lines
20 KiB
JavaScript
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var Marker = require('./marker');
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var Token = require('./token');
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var formatPosition = require('../utils/format-position');
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var Level = {
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BLOCK: 'block',
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COMMENT: 'comment',
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DOUBLE_QUOTE: 'double-quote',
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RULE: 'rule',
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SINGLE_QUOTE: 'single-quote'
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};
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var AT_RULES = [
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'@charset',
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'@import'
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];
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var BLOCK_RULES = [
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'@-moz-document',
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'@document',
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'@-moz-keyframes',
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'@-ms-keyframes',
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'@-o-keyframes',
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'@-webkit-keyframes',
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'@keyframes',
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'@media',
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'@supports'
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];
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var RULE_WORD_SEPARATOR_PATTERN = /[\s\(]/;
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var TAIL_BROKEN_VALUE_PATTERN = /[\s|\}]*$/;
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function tokenize(source, externalContext) {
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var internalContext = {
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level: Level.BLOCK,
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position: {
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source: externalContext.source || undefined,
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line: 1,
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column: 0,
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index: 0
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}
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};
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return intoTokens(source, externalContext, internalContext, false);
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}
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function intoTokens(source, externalContext, internalContext, isNested) {
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var allTokens = [];
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var newTokens = allTokens;
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var lastToken;
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var ruleToken;
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var ruleTokens = [];
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var propertyToken;
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var metadata;
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var metadatas = [];
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var level = internalContext.level;
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var levels = [];
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var buffer = [];
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var buffers = [];
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var serializedBuffer;
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var roundBracketLevel = 0;
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var isQuoted;
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var isSpace;
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var isNewLineNix;
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var isNewLineWin;
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var isCommentStart;
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var wasCommentStart = false;
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var isCommentEnd;
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var wasCommentEnd = false;
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var isEscaped;
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var wasEscaped = false;
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var seekingValue = false;
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var seekingPropertyBlockClosing = false;
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var position = internalContext.position;
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for (; position.index < source.length; position.index++) {
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var character = source[position.index];
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isQuoted = level == Level.SINGLE_QUOTE || level == Level.DOUBLE_QUOTE;
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isSpace = character == Marker.SPACE || character == Marker.TAB;
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isNewLineNix = character == Marker.NEW_LINE_NIX;
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isNewLineWin = character == Marker.NEW_LINE_NIX && source[position.index - 1] == Marker.NEW_LINE_WIN;
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isCommentStart = !wasCommentEnd && level != Level.COMMENT && !isQuoted && character == Marker.ASTERISK && source[position.index - 1] == Marker.FORWARD_SLASH;
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isCommentEnd = !wasCommentStart && level == Level.COMMENT && character == Marker.FORWARD_SLASH && source[position.index - 1] == Marker.ASTERISK;
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metadata = buffer.length === 0 ?
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[position.line, position.column, position.source] :
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metadata;
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if (isEscaped) {
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// previous character was a backslash
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buffer.push(character);
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} else if (!isCommentEnd && level == Level.COMMENT) {
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buffer.push(character);
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} else if (isCommentStart && (level == Level.BLOCK || level == Level.RULE) && buffer.length > 1) {
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// comment start within block preceded by some content, e.g. div/*<--
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metadatas.push(metadata);
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buffer.push(character);
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buffers.push(buffer.slice(0, buffer.length - 2));
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buffer = buffer.slice(buffer.length - 2);
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metadata = [position.line, position.column - 1, position.source];
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levels.push(level);
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level = Level.COMMENT;
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} else if (isCommentStart) {
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// comment start, e.g. /*<--
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levels.push(level);
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level = Level.COMMENT;
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buffer.push(character);
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} else if (isCommentEnd) {
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// comment end, e.g. /* comment */<--
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serializedBuffer = buffer.join('').trim() + character;
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lastToken = [Token.COMMENT, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]];
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newTokens.push(lastToken);
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level = levels.pop();
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metadata = metadatas.pop() || null;
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buffer = buffers.pop() || [];
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} else if (character == Marker.SINGLE_QUOTE && !isQuoted) {
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// single quotation start, e.g. a[href^='https<--
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levels.push(level);
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level = Level.SINGLE_QUOTE;
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buffer.push(character);
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} else if (character == Marker.SINGLE_QUOTE && level == Level.SINGLE_QUOTE) {
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// single quotation end, e.g. a[href^='https'<--
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level = levels.pop();
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buffer.push(character);
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} else if (character == Marker.DOUBLE_QUOTE && !isQuoted) {
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// double quotation start, e.g. a[href^="<--
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levels.push(level);
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level = Level.DOUBLE_QUOTE;
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buffer.push(character);
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} else if (character == Marker.DOUBLE_QUOTE && level == Level.DOUBLE_QUOTE) {
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// double quotation end, e.g. a[href^="https"<--
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level = levels.pop();
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buffer.push(character);
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} else if (!isCommentStart && !isCommentEnd && character != Marker.CLOSE_ROUND_BRACKET && character != Marker.OPEN_ROUND_BRACKET && level != Level.COMMENT && !isQuoted && roundBracketLevel > 0) {
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// character inside any function, e.g. hsla(.<--
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buffer.push(character);
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} else if (character == Marker.OPEN_ROUND_BRACKET && !isQuoted && level != Level.COMMENT && !seekingValue) {
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// round open bracket, e.g. @import url(<--
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buffer.push(character);
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roundBracketLevel++;
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} else if (character == Marker.CLOSE_ROUND_BRACKET && !isQuoted && level != Level.COMMENT && !seekingValue) {
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// round open bracket, e.g. @import url(test.css)<--
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buffer.push(character);
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roundBracketLevel--;
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} else if (character == Marker.SEMICOLON && level == Level.BLOCK && buffer[0] == Marker.AT) {
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// semicolon ending rule at block level, e.g. @import '...';<--
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serializedBuffer = buffer.join('').trim();
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allTokens.push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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buffer = [];
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} else if (character == Marker.COMMA && level == Level.BLOCK && ruleToken) {
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// comma separator at block level, e.g. a,div,<--
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serializedBuffer = buffer.join('').trim();
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ruleToken[1].push([tokenScopeFrom(ruleToken[0]), serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext, ruleToken[1].length)]]);
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buffer = [];
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} else if (character == Marker.COMMA && level == Level.BLOCK && tokenTypeFrom(buffer) == Token.AT_RULE) {
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// comma separator at block level, e.g. @import url(...) screen,<--
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// keep iterating as end semicolon will create the token
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buffer.push(character);
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} else if (character == Marker.COMMA && level == Level.BLOCK) {
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// comma separator at block level, e.g. a,<--
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ruleToken = [tokenTypeFrom(buffer), [], []];
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serializedBuffer = buffer.join('').trim();
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ruleToken[1].push([tokenScopeFrom(ruleToken[0]), serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext, 0)]]);
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buffer = [];
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} else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.BLOCK && ruleToken && ruleToken[0] == Token.NESTED_BLOCK) {
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// open brace opening at-rule at block level, e.g. @media{<--
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serializedBuffer = buffer.join('').trim();
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ruleToken[1].push([Token.NESTED_BLOCK_SCOPE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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allTokens.push(ruleToken);
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levels.push(level);
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position.column++;
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position.index++;
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buffer = [];
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ruleToken[2] = intoTokens(source, externalContext, internalContext, true);
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ruleToken = null;
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} else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.BLOCK && tokenTypeFrom(buffer) == Token.NESTED_BLOCK) {
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// open brace opening at-rule at block level, e.g. @media{<--
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serializedBuffer = buffer.join('').trim();
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ruleToken = ruleToken || [Token.NESTED_BLOCK, [], []];
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ruleToken[1].push([Token.NESTED_BLOCK_SCOPE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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allTokens.push(ruleToken);
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levels.push(level);
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position.column++;
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position.index++;
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buffer = [];
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ruleToken[2] = intoTokens(source, externalContext, internalContext, true);
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ruleToken = null;
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} else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.BLOCK) {
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// open brace opening rule at block level, e.g. div{<--
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serializedBuffer = buffer.join('').trim();
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ruleToken = ruleToken || [tokenTypeFrom(buffer), [], []];
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ruleToken[1].push([tokenScopeFrom(ruleToken[0]), serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext, ruleToken[1].length)]]);
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newTokens = ruleToken[2];
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allTokens.push(ruleToken);
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levels.push(level);
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level = Level.RULE;
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buffer = [];
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} else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.RULE && seekingValue) {
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// open brace opening rule at rule level, e.g. div{--variable:{<--
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ruleTokens.push(ruleToken);
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ruleToken = [Token.PROPERTY_BLOCK, []];
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propertyToken.push(ruleToken);
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newTokens = ruleToken[1];
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levels.push(level);
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level = Level.RULE;
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seekingValue = false;
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} else if (character == Marker.COLON && level == Level.RULE && !seekingValue) {
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// colon at rule level, e.g. a{color:<--
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serializedBuffer = buffer.join('').trim();
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propertyToken = [Token.PROPERTY, [Token.PROPERTY_NAME, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]];
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newTokens.push(propertyToken);
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seekingValue = true;
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buffer = [];
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} else if (character == Marker.SEMICOLON && level == Level.RULE && propertyToken && ruleTokens.length > 0 && buffer.length > 0 && buffer[0] == Marker.AT) {
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// semicolon at rule level for at-rule, e.g. a{--color:{@apply(--other-color);<--
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serializedBuffer = buffer.join('').trim();
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ruleToken[1].push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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buffer = [];
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} else if (character == Marker.SEMICOLON && level == Level.RULE && propertyToken && buffer.length > 0) {
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// semicolon at rule level, e.g. a{color:red;<--
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serializedBuffer = buffer.join('').trim();
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propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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propertyToken = null;
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seekingValue = false;
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buffer = [];
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} else if (character == Marker.SEMICOLON && level == Level.RULE && propertyToken && buffer.length === 0) {
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// semicolon after bracketed value at rule level, e.g. a{color:rgb(...);<--
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propertyToken = null;
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seekingValue = false;
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} else if (character == Marker.SEMICOLON && level == Level.RULE && buffer.length > 0 && buffer[0] == Marker.AT) {
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// semicolon for at-rule at rule level, e.g. a{@apply(--variable);<--
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serializedBuffer = buffer.join('');
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newTokens.push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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seekingValue = false;
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buffer = [];
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} else if (character == Marker.SEMICOLON && level == Level.RULE && seekingPropertyBlockClosing) {
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// close brace after a property block at rule level, e.g. a{--custom:{color:red;};<--
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seekingPropertyBlockClosing = false;
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buffer = [];
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} else if (character == Marker.SEMICOLON && level == Level.RULE && buffer.length === 0) {
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// stray semicolon at rule level, e.g. a{;<--
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// noop
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} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && propertyToken && seekingValue && buffer.length > 0 && ruleTokens.length > 0) {
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// close brace at rule level, e.g. a{--color:{color:red}<--
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serializedBuffer = buffer.join('');
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propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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propertyToken = null;
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ruleToken = ruleTokens.pop();
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newTokens = ruleToken[2];
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level = levels.pop();
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seekingValue = false;
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buffer = [];
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} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && propertyToken && buffer.length > 0 && buffer[0] == Marker.AT && ruleTokens.length > 0) {
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// close brace at rule level for at-rule, e.g. a{--color:{@apply(--other-color)}<--
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serializedBuffer = buffer.join('');
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ruleToken[1].push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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propertyToken = null;
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ruleToken = ruleTokens.pop();
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newTokens = ruleToken[2];
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level = levels.pop();
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seekingValue = false;
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buffer = [];
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} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && propertyToken && ruleTokens.length > 0) {
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// close brace at rule level after space, e.g. a{--color:{color:red }<--
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propertyToken = null;
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ruleToken = ruleTokens.pop();
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newTokens = ruleToken[2];
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level = levels.pop();
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seekingValue = false;
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} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && propertyToken && buffer.length > 0) {
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// close brace at rule level, e.g. a{color:red}<--
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serializedBuffer = buffer.join('');
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propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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propertyToken = null;
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ruleToken = ruleTokens.pop();
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newTokens = allTokens;
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level = levels.pop();
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seekingValue = false;
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buffer = [];
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} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && buffer.length > 0 && buffer[0] == Marker.AT) {
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// close brace after at-rule at rule level, e.g. a{@apply(--variable)}<--
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propertyToken = null;
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ruleToken = null;
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serializedBuffer = buffer.join('').trim();
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newTokens.push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
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newTokens = allTokens;
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level = levels.pop();
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seekingValue = false;
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buffer = [];
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} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && levels[levels.length - 1] == Level.RULE) {
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// close brace after a property block at rule level, e.g. a{--custom:{color:red;}<--
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propertyToken = null;
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ruleToken = ruleTokens.pop();
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newTokens = ruleToken[2];
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level = levels.pop();
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seekingValue = false;
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|
|
seekingPropertyBlockClosing = true;
|
||
|
|
buffer = [];
|
||
|
|
} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE) {
|
||
|
|
// close brace after a rule, e.g. a{color:red;}<--
|
||
|
|
propertyToken = null;
|
||
|
|
ruleToken = null;
|
||
|
|
newTokens = allTokens;
|
||
|
|
|
||
|
|
level = levels.pop();
|
||
|
|
seekingValue = false;
|
||
|
|
} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.BLOCK && !isNested && position.index <= source.length - 1) {
|
||
|
|
// stray close brace at block level, e.g. a{color:red}color:blue}<--
|
||
|
|
externalContext.warnings.push('Unexpected \'}\' at ' + formatPosition([position.line, position.column, position.source]) + '.');
|
||
|
|
buffer.push(character);
|
||
|
|
} else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.BLOCK) {
|
||
|
|
// close brace at block level, e.g. @media screen {...}<--
|
||
|
|
break;
|
||
|
|
} else if (character == Marker.OPEN_ROUND_BRACKET && level == Level.RULE && seekingValue) {
|
||
|
|
// round open bracket, e.g. a{color:hsla(<--
|
||
|
|
buffer.push(character);
|
||
|
|
roundBracketLevel++;
|
||
|
|
} else if (character == Marker.CLOSE_ROUND_BRACKET && level == Level.RULE && seekingValue && roundBracketLevel == 1) {
|
||
|
|
// round close bracket, e.g. a{color:hsla(0,0%,0%)<--
|
||
|
|
buffer.push(character);
|
||
|
|
serializedBuffer = buffer.join('').trim();
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
|
||
|
|
|
||
|
|
roundBracketLevel--;
|
||
|
|
buffer = [];
|
||
|
|
} else if (character == Marker.CLOSE_ROUND_BRACKET && level == Level.RULE && seekingValue) {
|
||
|
|
// round close bracket within other brackets, e.g. a{width:calc((10rem / 2)<--
|
||
|
|
buffer.push(character);
|
||
|
|
roundBracketLevel--;
|
||
|
|
} else if (character == Marker.FORWARD_SLASH && source[position.index + 1] != Marker.ASTERISK && level == Level.RULE && seekingValue && buffer.length > 0) {
|
||
|
|
// forward slash within a property, e.g. a{background:url(image.png) 0 0/<--
|
||
|
|
serializedBuffer = buffer.join('').trim();
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, character, [[position.line, position.column, position.source]]]);
|
||
|
|
|
||
|
|
buffer = [];
|
||
|
|
} else if (character == Marker.FORWARD_SLASH && source[position.index + 1] != Marker.ASTERISK && level == Level.RULE && seekingValue) {
|
||
|
|
// forward slash within a property after space, e.g. a{background:url(image.png) 0 0 /<--
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, character, [[position.line, position.column, position.source]]]);
|
||
|
|
|
||
|
|
buffer = [];
|
||
|
|
} else if (character == Marker.COMMA && level == Level.RULE && seekingValue && buffer.length > 0) {
|
||
|
|
// comma within a property, e.g. a{background:url(image.png),<--
|
||
|
|
serializedBuffer = buffer.join('').trim();
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, character, [[position.line, position.column, position.source]]]);
|
||
|
|
|
||
|
|
buffer = [];
|
||
|
|
} else if (character == Marker.COMMA && level == Level.RULE && seekingValue) {
|
||
|
|
// comma within a property after space, e.g. a{background:url(image.png) ,<--
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, character, [[position.line, position.column, position.source]]]);
|
||
|
|
|
||
|
|
buffer = [];
|
||
|
|
} else if ((isSpace || (isNewLineNix && !isNewLineWin)) && level == Level.RULE && seekingValue && propertyToken && buffer.length > 0) {
|
||
|
|
// space or *nix newline within property, e.g. a{margin:0 <--
|
||
|
|
serializedBuffer = buffer.join('').trim();
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
|
||
|
|
|
||
|
|
buffer = [];
|
||
|
|
} else if (isNewLineWin && level == Level.RULE && seekingValue && propertyToken && buffer.length > 1) {
|
||
|
|
// win newline within property, e.g. a{margin:0\r\n<--
|
||
|
|
serializedBuffer = buffer.join('').trim();
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
|
||
|
|
|
||
|
|
buffer = [];
|
||
|
|
} else if (isNewLineWin && level == Level.RULE && seekingValue) {
|
||
|
|
// win newline
|
||
|
|
buffer = [];
|
||
|
|
} else if (buffer.length == 1 && isNewLineWin) {
|
||
|
|
// ignore windows newline which is composed of two characters
|
||
|
|
buffer.pop();
|
||
|
|
} else if (buffer.length > 0 || !isSpace && !isNewLineNix && !isNewLineWin) {
|
||
|
|
// any character
|
||
|
|
buffer.push(character);
|
||
|
|
}
|
||
|
|
|
||
|
|
wasEscaped = isEscaped;
|
||
|
|
isEscaped = !wasEscaped && character == Marker.BACK_SLASH;
|
||
|
|
wasCommentStart = isCommentStart;
|
||
|
|
wasCommentEnd = isCommentEnd;
|
||
|
|
|
||
|
|
position.line = (isNewLineWin || isNewLineNix) ? position.line + 1 : position.line;
|
||
|
|
position.column = (isNewLineWin || isNewLineNix) ? 0 : position.column + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (seekingValue) {
|
||
|
|
externalContext.warnings.push('Missing \'}\' at ' + formatPosition([position.line, position.column, position.source]) + '.');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (seekingValue && buffer.length > 0) {
|
||
|
|
serializedBuffer = buffer.join('').replace(TAIL_BROKEN_VALUE_PATTERN, '');
|
||
|
|
propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);
|
||
|
|
|
||
|
|
buffer = [];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (buffer.length > 0) {
|
||
|
|
externalContext.warnings.push('Invalid character(s) \'' + buffer.join('') + '\' at ' + formatPosition(metadata) + '. Ignoring.');
|
||
|
|
}
|
||
|
|
|
||
|
|
return allTokens;
|
||
|
|
}
|
||
|
|
|
||
|
|
function originalMetadata(metadata, value, externalContext, selectorFallbacks) {
|
||
|
|
var source = metadata[2];
|
||
|
|
|
||
|
|
return externalContext.inputSourceMapTracker.isTracking(source) ?
|
||
|
|
externalContext.inputSourceMapTracker.originalPositionFor(metadata, value.length, selectorFallbacks) :
|
||
|
|
metadata;
|
||
|
|
}
|
||
|
|
|
||
|
|
function tokenTypeFrom(buffer) {
|
||
|
|
var isAtRule = buffer[0] == Marker.AT || buffer[0] == Marker.UNDERSCORE;
|
||
|
|
var ruleWord = buffer.join('').split(RULE_WORD_SEPARATOR_PATTERN)[0];
|
||
|
|
|
||
|
|
if (isAtRule && BLOCK_RULES.indexOf(ruleWord) > -1) {
|
||
|
|
return Token.NESTED_BLOCK;
|
||
|
|
} else if (isAtRule && AT_RULES.indexOf(ruleWord) > -1) {
|
||
|
|
return Token.AT_RULE;
|
||
|
|
} else if (isAtRule) {
|
||
|
|
return Token.AT_RULE_BLOCK;
|
||
|
|
} else {
|
||
|
|
return Token.RULE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function tokenScopeFrom(tokenType) {
|
||
|
|
if (tokenType == Token.RULE) {
|
||
|
|
return Token.RULE_SCOPE;
|
||
|
|
} else if (tokenType == Token.NESTED_BLOCK) {
|
||
|
|
return Token.NESTED_BLOCK_SCOPE;
|
||
|
|
} else if (tokenType == Token.AT_RULE_BLOCK) {
|
||
|
|
return Token.AT_RULE_BLOCK_SCOPE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = tokenize;
|