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'use strict';
var Mixin = require('../../utils/mixin'),
Tokenizer = require('../../tokenizer'),
PositionTrackingPreprocessorMixin = require('../position_tracking/preprocessor_mixin'),
inherits = require('util').inherits;
var LocationInfoTokenizerMixin = module.exports = function (tokenizer) {
Mixin.call(this, tokenizer);
this.tokenizer = tokenizer;
this.posTracker = new PositionTrackingPreprocessorMixin(tokenizer.preprocessor);
this.currentAttrLocation = null;
this.currentTokenLocation = null;
};
inherits(LocationInfoTokenizerMixin, Mixin);
LocationInfoTokenizerMixin.prototype._getCurrentLocation = function () {
return {
line: this.posTracker.line,
col: this.posTracker.col,
startOffset: this.posTracker.offset,
endOffset: -1
};
};
LocationInfoTokenizerMixin.prototype._attachCurrentAttrLocationInfo = function () {
this.currentAttrLocation.endOffset = this.posTracker.offset;
var currentToken = this.tokenizer.currentToken,
currentAttr = this.tokenizer.currentAttr;
if (!currentToken.location.attrs)
currentToken.location.attrs = Object.create(null);
currentToken.location.attrs[currentAttr.name] = this.currentAttrLocation;
};
LocationInfoTokenizerMixin.prototype._getOverriddenMethods = function (mxn, orig) {
var methods = {
_createStartTagToken: function () {
orig._createStartTagToken.call(this);
this.currentToken.location = mxn.currentTokenLocation;
},
_createEndTagToken: function () {
orig._createEndTagToken.call(this);
this.currentToken.location = mxn.currentTokenLocation;
},
_createCommentToken: function () {
orig._createCommentToken.call(this);
this.currentToken.location = mxn.currentTokenLocation;
},
_createDoctypeToken: function (initialName) {
orig._createDoctypeToken.call(this, initialName);
this.currentToken.location = mxn.currentTokenLocation;
},
_createCharacterToken: function (type, ch) {
orig._createCharacterToken.call(this, type, ch);
this.currentCharacterToken.location = mxn.currentTokenLocation;
},
_createAttr: function (attrNameFirstCh) {
orig._createAttr.call(this, attrNameFirstCh);
mxn.currentAttrLocation = mxn._getCurrentLocation();
},
_leaveAttrName: function (toState) {
orig._leaveAttrName.call(this, toState);
mxn._attachCurrentAttrLocationInfo();
},
_leaveAttrValue: function (toState) {
orig._leaveAttrValue.call(this, toState);
mxn._attachCurrentAttrLocationInfo();
},
_emitCurrentToken: function () {
//NOTE: if we have pending character token make it's end location equal to the
//current token's start location.
if (this.currentCharacterToken)
this.currentCharacterToken.location.endOffset = this.currentToken.location.startOffset;
this.currentToken.location.endOffset = mxn.posTracker.offset + 1;
orig._emitCurrentToken.call(this);
},
_emitCurrentCharacterToken: function () {
//NOTE: if we have character token and it's location wasn't set in the _emitCurrentToken(),
//then set it's location at the current preprocessor position.
//We don't need to increment preprocessor position, since character token
//emission is always forced by the start of the next character token here.
//So, we already have advanced position.
if (this.currentCharacterToken && this.currentCharacterToken.location.endOffset === -1)
this.currentCharacterToken.location.endOffset = mxn.posTracker.offset;
orig._emitCurrentCharacterToken.call(this);
}
};
//NOTE: patch initial states for each mode to obtain token start position
Object.keys(Tokenizer.MODE).forEach(function (modeName) {
var state = Tokenizer.MODE[modeName];
methods[state] = function (cp) {
mxn.currentTokenLocation = mxn._getCurrentLocation();
orig[state].call(this, cp);
};
});
return methods;
};
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