tenebrous-dicebot/api/node_modules/htmlparser2/lib/Parser.js

383 lines
9.3 KiB
JavaScript

var Tokenizer = require("./Tokenizer.js");
/*
Options:
xmlMode: Disables the special behavior for script/style tags (false by default)
lowerCaseAttributeNames: call .toLowerCase for each attribute name (true if xmlMode is `false`)
lowerCaseTags: call .toLowerCase for each tag name (true if xmlMode is `false`)
*/
/*
Callbacks:
oncdataend,
oncdatastart,
onclosetag,
oncomment,
oncommentend,
onerror,
onopentag,
onprocessinginstruction,
onreset,
ontext
*/
var formTags = {
input: true,
option: true,
optgroup: true,
select: true,
button: true,
datalist: true,
textarea: true
};
var openImpliesClose = {
tr: { tr: true, th: true, td: true },
th: { th: true },
td: { thead: true, th: true, td: true },
body: { head: true, link: true, script: true },
li: { li: true },
p: { p: true },
h1: { p: true },
h2: { p: true },
h3: { p: true },
h4: { p: true },
h5: { p: true },
h6: { p: true },
select: formTags,
input: formTags,
output: formTags,
button: formTags,
datalist: formTags,
textarea: formTags,
option: { option: true },
optgroup: { optgroup: true }
};
var voidElements = {
__proto__: null,
area: true,
base: true,
basefont: true,
br: true,
col: true,
command: true,
embed: true,
frame: true,
hr: true,
img: true,
input: true,
isindex: true,
keygen: true,
link: true,
meta: true,
param: true,
source: true,
track: true,
wbr: true
};
var foreignContextElements = {
__proto__: null,
math: true,
svg: true
};
var htmlIntegrationElements = {
__proto__: null,
mi: true,
mo: true,
mn: true,
ms: true,
mtext: true,
"annotation-xml": true,
foreignObject: true,
desc: true,
title: true
};
var re_nameEnd = /\s|\//;
function Parser(cbs, options) {
this._options = options || {};
this._cbs = cbs || {};
this._tagname = "";
this._attribname = "";
this._attribvalue = "";
this._attribs = null;
this._stack = [];
this._foreignContext = [];
this.startIndex = 0;
this.endIndex = null;
this._lowerCaseTagNames =
"lowerCaseTags" in this._options
? !!this._options.lowerCaseTags
: !this._options.xmlMode;
this._lowerCaseAttributeNames =
"lowerCaseAttributeNames" in this._options
? !!this._options.lowerCaseAttributeNames
: !this._options.xmlMode;
if (this._options.Tokenizer) {
Tokenizer = this._options.Tokenizer;
}
this._tokenizer = new Tokenizer(this._options, this);
if (this._cbs.onparserinit) this._cbs.onparserinit(this);
}
require("inherits")(Parser, require("events").EventEmitter);
Parser.prototype._updatePosition = function(initialOffset) {
if (this.endIndex === null) {
if (this._tokenizer._sectionStart <= initialOffset) {
this.startIndex = 0;
} else {
this.startIndex = this._tokenizer._sectionStart - initialOffset;
}
} else this.startIndex = this.endIndex + 1;
this.endIndex = this._tokenizer.getAbsoluteIndex();
};
//Tokenizer event handlers
Parser.prototype.ontext = function(data) {
this._updatePosition(1);
this.endIndex--;
if (this._cbs.ontext) this._cbs.ontext(data);
};
Parser.prototype.onopentagname = function(name) {
if (this._lowerCaseTagNames) {
name = name.toLowerCase();
}
this._tagname = name;
if (!this._options.xmlMode && name in openImpliesClose) {
for (
var el;
(el = this._stack[this._stack.length - 1]) in
openImpliesClose[name];
this.onclosetag(el)
);
}
if (this._options.xmlMode || !(name in voidElements)) {
this._stack.push(name);
if (name in foreignContextElements) this._foreignContext.push(true);
else if (name in htmlIntegrationElements)
this._foreignContext.push(false);
}
if (this._cbs.onopentagname) this._cbs.onopentagname(name);
if (this._cbs.onopentag) this._attribs = {};
};
Parser.prototype.onopentagend = function() {
this._updatePosition(1);
if (this._attribs) {
if (this._cbs.onopentag)
this._cbs.onopentag(this._tagname, this._attribs);
this._attribs = null;
}
if (
!this._options.xmlMode &&
this._cbs.onclosetag &&
this._tagname in voidElements
) {
this._cbs.onclosetag(this._tagname);
}
this._tagname = "";
};
Parser.prototype.onclosetag = function(name) {
this._updatePosition(1);
if (this._lowerCaseTagNames) {
name = name.toLowerCase();
}
if (name in foreignContextElements || name in htmlIntegrationElements) {
this._foreignContext.pop();
}
if (
this._stack.length &&
(!(name in voidElements) || this._options.xmlMode)
) {
var pos = this._stack.lastIndexOf(name);
if (pos !== -1) {
if (this._cbs.onclosetag) {
pos = this._stack.length - pos;
while (pos--) this._cbs.onclosetag(this._stack.pop());
} else this._stack.length = pos;
} else if (name === "p" && !this._options.xmlMode) {
this.onopentagname(name);
this._closeCurrentTag();
}
} else if (!this._options.xmlMode && (name === "br" || name === "p")) {
this.onopentagname(name);
this._closeCurrentTag();
}
};
Parser.prototype.onselfclosingtag = function() {
if (
this._options.xmlMode ||
this._options.recognizeSelfClosing ||
this._foreignContext[this._foreignContext.length - 1]
) {
this._closeCurrentTag();
} else {
this.onopentagend();
}
};
Parser.prototype._closeCurrentTag = function() {
var name = this._tagname;
this.onopentagend();
//self-closing tags will be on the top of the stack
//(cheaper check than in onclosetag)
if (this._stack[this._stack.length - 1] === name) {
if (this._cbs.onclosetag) {
this._cbs.onclosetag(name);
}
this._stack.pop();
}
};
Parser.prototype.onattribname = function(name) {
if (this._lowerCaseAttributeNames) {
name = name.toLowerCase();
}
this._attribname = name;
};
Parser.prototype.onattribdata = function(value) {
this._attribvalue += value;
};
Parser.prototype.onattribend = function() {
if (this._cbs.onattribute)
this._cbs.onattribute(this._attribname, this._attribvalue);
if (
this._attribs &&
!Object.prototype.hasOwnProperty.call(this._attribs, this._attribname)
) {
this._attribs[this._attribname] = this._attribvalue;
}
this._attribname = "";
this._attribvalue = "";
};
Parser.prototype._getInstructionName = function(value) {
var idx = value.search(re_nameEnd),
name = idx < 0 ? value : value.substr(0, idx);
if (this._lowerCaseTagNames) {
name = name.toLowerCase();
}
return name;
};
Parser.prototype.ondeclaration = function(value) {
if (this._cbs.onprocessinginstruction) {
var name = this._getInstructionName(value);
this._cbs.onprocessinginstruction("!" + name, "!" + value);
}
};
Parser.prototype.onprocessinginstruction = function(value) {
if (this._cbs.onprocessinginstruction) {
var name = this._getInstructionName(value);
this._cbs.onprocessinginstruction("?" + name, "?" + value);
}
};
Parser.prototype.oncomment = function(value) {
this._updatePosition(4);
if (this._cbs.oncomment) this._cbs.oncomment(value);
if (this._cbs.oncommentend) this._cbs.oncommentend();
};
Parser.prototype.oncdata = function(value) {
this._updatePosition(1);
if (this._options.xmlMode || this._options.recognizeCDATA) {
if (this._cbs.oncdatastart) this._cbs.oncdatastart();
if (this._cbs.ontext) this._cbs.ontext(value);
if (this._cbs.oncdataend) this._cbs.oncdataend();
} else {
this.oncomment("[CDATA[" + value + "]]");
}
};
Parser.prototype.onerror = function(err) {
if (this._cbs.onerror) this._cbs.onerror(err);
};
Parser.prototype.onend = function() {
if (this._cbs.onclosetag) {
for (
var i = this._stack.length;
i > 0;
this._cbs.onclosetag(this._stack[--i])
);
}
if (this._cbs.onend) this._cbs.onend();
};
//Resets the parser to a blank state, ready to parse a new HTML document
Parser.prototype.reset = function() {
if (this._cbs.onreset) this._cbs.onreset();
this._tokenizer.reset();
this._tagname = "";
this._attribname = "";
this._attribs = null;
this._stack = [];
if (this._cbs.onparserinit) this._cbs.onparserinit(this);
};
//Parses a complete HTML document and pushes it to the handler
Parser.prototype.parseComplete = function(data) {
this.reset();
this.end(data);
};
Parser.prototype.write = function(chunk) {
this._tokenizer.write(chunk);
};
Parser.prototype.end = function(chunk) {
this._tokenizer.end(chunk);
};
Parser.prototype.pause = function() {
this._tokenizer.pause();
};
Parser.prototype.resume = function() {
this._tokenizer.resume();
};
//alias for backwards compat
Parser.prototype.parseChunk = Parser.prototype.write;
Parser.prototype.done = Parser.prototype.end;
module.exports = Parser;