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node_modules/parse5/lib/tokenizer/preprocessor.js

@@ -1,147 +0,0 @@
-'use strict';
-
-var UNICODE = require('../common/unicode');
-
-//Aliases
-var $ = UNICODE.CODE_POINTS;
-
-//Utils
-
-//OPTIMIZATION: these utility functions should not be moved out of this module. V8 Crankshaft will not inline
-//this functions if they will be situated in another module due to context switch.
-//Always perform inlining check before modifying this functions ('node --trace-inlining').
-function isSurrogatePair(cp1, cp2) {
-    return cp1 >= 0xD800 && cp1 <= 0xDBFF && cp2 >= 0xDC00 && cp2 <= 0xDFFF;
-}
-
-function getSurrogatePairCodePoint(cp1, cp2) {
-    return (cp1 - 0xD800) * 0x400 + 0x2400 + cp2;
-}
-
-
-//Const
-var DEFAULT_BUFFER_WATERLINE = 1 << 16;
-
-
-//Preprocessor
-//NOTE: HTML input preprocessing
-//(see: http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#preprocessing-the-input-stream)
-var Preprocessor = module.exports = function () {
-    this.html = null;
-
-    this.pos = -1;
-    this.lastGapPos = -1;
-    this.lastCharPos = -1;
-
-    this.gapStack = [];
-
-    this.skipNextNewLine = false;
-
-    this.lastChunkWritten = false;
-    this.endOfChunkHit = false;
-    this.bufferWaterline = DEFAULT_BUFFER_WATERLINE;
-};
-
-Preprocessor.prototype.dropParsedChunk = function () {
-    if (this.pos > this.bufferWaterline) {
-        this.lastCharPos -= this.pos;
-        this.html = this.html.substring(this.pos);
-        this.pos = 0;
-        this.lastGapPos = -1;
-        this.gapStack = [];
-    }
-};
-
-Preprocessor.prototype._addGap = function () {
-    this.gapStack.push(this.lastGapPos);
-    this.lastGapPos = this.pos;
-};
-
-Preprocessor.prototype._processHighRangeCodePoint = function (cp) {
-    //NOTE: try to peek a surrogate pair
-    if (this.pos !== this.lastCharPos) {
-        var nextCp = this.html.charCodeAt(this.pos + 1);
-
-        if (isSurrogatePair(cp, nextCp)) {
-            //NOTE: we have a surrogate pair. Peek pair character and recalculate code point.
-            this.pos++;
-            cp = getSurrogatePairCodePoint(cp, nextCp);
-
-            //NOTE: add gap that should be avoided during retreat
-            this._addGap();
-        }
-    }
-
-    // NOTE: we've hit the end of chunk, stop processing at this point
-    else if (!this.lastChunkWritten) {
-        this.endOfChunkHit = true;
-        return $.EOF;
-    }
-
-    return cp;
-};
-
-Preprocessor.prototype.write = function (chunk, isLastChunk) {
-    if (this.html)
-        this.html += chunk;
-
-    else
-        this.html = chunk;
-
-    this.lastCharPos = this.html.length - 1;
-    this.endOfChunkHit = false;
-    this.lastChunkWritten = isLastChunk;
-};
-
-Preprocessor.prototype.insertHtmlAtCurrentPos = function (chunk) {
-    this.html = this.html.substring(0, this.pos + 1) +
-                chunk +
-                this.html.substring(this.pos + 1, this.html.length);
-
-    this.lastCharPos = this.html.length - 1;
-    this.endOfChunkHit = false;
-};
-
-
-Preprocessor.prototype.advance = function () {
-    this.pos++;
-
-    if (this.pos > this.lastCharPos) {
-        if (!this.lastChunkWritten)
-            this.endOfChunkHit = true;
-
-        return $.EOF;
-    }
-
-    var cp = this.html.charCodeAt(this.pos);
-
-    //NOTE: any U+000A LINE FEED (LF) characters that immediately follow a U+000D CARRIAGE RETURN (CR) character
-    //must be ignored.
-    if (this.skipNextNewLine && cp === $.LINE_FEED) {
-        this.skipNextNewLine = false;
-        this._addGap();
-        return this.advance();
-    }
-
-    //NOTE: all U+000D CARRIAGE RETURN (CR) characters must be converted to U+000A LINE FEED (LF) characters
-    if (cp === $.CARRIAGE_RETURN) {
-        this.skipNextNewLine = true;
-        return $.LINE_FEED;
-    }
-
-    this.skipNextNewLine = false;
-
-    //OPTIMIZATION: first perform check if the code point in the allowed range that covers most common
-    //HTML input (e.g. ASCII codes) to avoid performance-cost operations for high-range code points.
-    return cp >= 0xD800 ? this._processHighRangeCodePoint(cp) : cp;
-};
-
-Preprocessor.prototype.retreat = function () {
-    if (this.pos === this.lastGapPos) {
-        this.lastGapPos = this.gapStack.pop();
-        this.pos--;
-    }
-
-    this.pos--;
-};
-