зеркало из https://github.com/mozilla/slowparse.git
Rearranged the ordering of HTMLParser function definitions to make the workings of the class easier to understand.
This commit is contained in:
Atul Varma
Родитель
0962ff44f4
Коммит
7df7ccb64c
170
slowparse.js
170
slowparse.js
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@ -851,6 +851,43 @@ var Slowparse = (function() {
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this.htmlElements.indexOf(tagName) > -1 ||
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this.obsoleteHtmlElements.indexOf(tagName) > -1;
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},
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// #### The HTML Master Parse Function
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//
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// The HTML master parse function works the same as the CSS
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// parser: it takes the token stream and will try to parse
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// the content as a sequence of HTML elements.
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//
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// Any parse errors along the way will result in the code
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// throwing a `ParseError`.
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parse: function() {
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// First we check to see if the beginning of our stream is
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// an HTML5 doctype tag. We're currently quite strict and don't
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// parse XHTML or other doctypes.
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if (this.stream.match(this.html5Doctype, true, true))
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this.domBuilder.fragment.parseInfo = {
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doctype: {
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start: 0,
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end: this.stream.pos
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}
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};
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// Next, we parse "tag soup", creating text nodes and diving into
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// tags as we find them.
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while (!this.stream.end()) {
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if (this.stream.peek() == '<') {
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this._buildTextNode();
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this._parseStartTag();
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} else
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this.stream.next();
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}
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this._buildTextNode();
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// At the end, it's possible we're left with an open tag, so
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// we test for that.
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if (this.domBuilder.currentNode != this.domBuilder.fragment)
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throw new ParseError("UNCLOSED_TAG", this);
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},
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// This is a helper to build a DOM text node.
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_buildTextNode: function() {
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var token = this.stream.makeToken();
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@ -858,23 +895,10 @@ var Slowparse = (function() {
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this.domBuilder.text(replaceEntityRefs(token.value), token.interval);
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}
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},
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// This helper parses HTML comments. It assumes the stream has just
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// passed the beginning `<!--` of an HTML comment.
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_parseComment: function() {
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var token;
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while (!this.stream.end()) {
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if (this.stream.match('-->', true)) {
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token = this.stream.makeToken();
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this.domBuilder.comment(token.value.slice(4, -3), token.interval);
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return;
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}
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this.stream.next();
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}
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token = this.stream.makeToken();
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throw new ParseError("UNTERMINATED_COMMENT", token);
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},
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// This helper parses the beginning of an HTML tag. It assumes the
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// stream is on a `<` character.
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// #### HTML Tag Parsing
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//
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// This is the entry point for parsing the beginning of an HTML tag.
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// It assumes the stream is on a `<` character.
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_parseStartTag: function() {
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if (this.stream.next() != '<')
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throw new Error('assertion failed, expected to be on "<"');
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@ -918,6 +942,21 @@ var Slowparse = (function() {
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this._parseEndOpenTag(tagName);
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}
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},
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// This helper parses HTML comments. It assumes the stream has just
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// passed the beginning `<!--` of an HTML comment.
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_parseComment: function() {
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var token;
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while (!this.stream.end()) {
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if (this.stream.match('-->', true)) {
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token = this.stream.makeToken();
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this.domBuilder.comment(token.value.slice(4, -3), token.interval);
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return;
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}
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this.stream.next();
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}
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token = this.stream.makeToken();
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throw new ParseError("UNTERMINATED_COMMENT", token);
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},
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// This helper function parses the end of a closing tag. It expects
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// the stream to be right after the end of the closing tag's tag
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// name.
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@ -929,38 +968,6 @@ var Slowparse = (function() {
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this.domBuilder.currentNode.parseInfo.closeTag.end = end;
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this.domBuilder.popElement();
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},
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// This helper function parses an HTML tag attribute. It expects
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// the stream to be right after the end of an attribute name.
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_parseAttribute: function() {
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var nameTok = this.stream.makeToken();
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this.stream.eatSpace();
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// If the character after the attribute name is a `=`, then we
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// look for an attribute value; otherwise, this is a boolean
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// attribute.
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if (this.stream.peek() == '=') {
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this.stream.next();
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// Currently, we only support quoted attribute values, even
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// though the HTML5 standard allows them to sometimes go unquoted.
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this.stream.eatSpace();
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this.stream.makeToken();
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if (this.stream.next() != '"')
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throw new ParseError("UNQUOTED_ATTR_VALUE", this);
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this.stream.eatWhile(/[^"]/);
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if (this.stream.next() != '"')
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throw new ParseError("UNTERMINATED_ATTR_VALUE", this, nameTok);
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var valueTok = this.stream.makeToken();
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var unquotedValue = replaceEntityRefs(valueTok.value.slice(1, -1));
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this.domBuilder.attribute(nameTok.value, unquotedValue, {
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name: nameTok.interval,
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value: valueTok.interval
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});
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} else {
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this.stream.makeToken();
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this.domBuilder.attribute(nameTok.value, '', {
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name: nameTok.interval
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});
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}
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},
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// This helper function parses the rest of an opening tag after
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// its tag name, looking for `attribute="value"` data until a
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// `>` is encountered.
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@ -996,42 +1003,37 @@ var Slowparse = (function() {
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throw new ParseError("UNTERMINATED_OPEN_TAG", this);
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}
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},
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// #### The HTML Master Parse Function
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//
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// The HTML master parse function works the same as the CSS
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// parser: it takes the token stream and will try to parse
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// the content as a sequence of HTML elements.
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//
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// Any parse errors along the way will result in the code
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// throwing a `ParseError`.
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parse: function() {
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// First we check to see if the beginning of our stream is
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// an HTML5 doctype tag. We're currently quite strict and don't
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// parse XHTML or other doctypes.
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if (this.stream.match(this.html5Doctype, true, true))
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this.domBuilder.fragment.parseInfo = {
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doctype: {
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start: 0,
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end: this.stream.pos
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}
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};
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// Next, we parse "tag soup", creating text nodes and diving into
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// tags as we find them.
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while (!this.stream.end()) {
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if (this.stream.peek() == '<') {
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this._buildTextNode();
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this._parseStartTag();
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} else
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this.stream.next();
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// This helper function parses an HTML tag attribute. It expects
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// the stream to be right after the end of an attribute name.
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_parseAttribute: function() {
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var nameTok = this.stream.makeToken();
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this.stream.eatSpace();
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// If the character after the attribute name is a `=`, then we
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// look for an attribute value; otherwise, this is a boolean
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// attribute.
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if (this.stream.peek() == '=') {
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this.stream.next();
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// Currently, we only support quoted attribute values, even
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// though the HTML5 standard allows them to sometimes go unquoted.
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this.stream.eatSpace();
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this.stream.makeToken();
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if (this.stream.next() != '"')
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throw new ParseError("UNQUOTED_ATTR_VALUE", this);
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this.stream.eatWhile(/[^"]/);
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if (this.stream.next() != '"')
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throw new ParseError("UNTERMINATED_ATTR_VALUE", this, nameTok);
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var valueTok = this.stream.makeToken();
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var unquotedValue = replaceEntityRefs(valueTok.value.slice(1, -1));
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this.domBuilder.attribute(nameTok.value, unquotedValue, {
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name: nameTok.interval,
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value: valueTok.interval
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});
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} else {
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this.stream.makeToken();
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this.domBuilder.attribute(nameTok.value, '', {
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name: nameTok.interval
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});
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}
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this._buildTextNode();
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// At the end, it's possible we're left with an open tag, so
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// we test for that.
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if (this.domBuilder.currentNode != this.domBuilder.fragment)
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throw new ParseError("UNCLOSED_TAG", this);
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}
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};
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