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authorJohn MacFarlane <jgm@berkeley.edu>2014-10-18 17:23:56 -0700
committerJohn MacFarlane <jgm@berkeley.edu>2014-10-18 17:23:56 -0700
commit21bb27698ee9dc797b3f594150877462453907db (patch)
tree7e5746ad948086b0b02b547eb400434259f3c9f1 /js/lib
parent17aa754c3c0e00f47a8e3f4c06f9df9705b269ec (diff)
Factored out inlines.js from index.js.
Diffstat (limited to 'js/lib')
-rwxr-xr-xjs/lib/index.js1898
-rw-r--r--js/lib/inlines.js739
2 files changed, 1321 insertions, 1316 deletions
diff --git a/js/lib/index.js b/js/lib/index.js
index 55db200..22b342a 100755
--- a/js/lib/index.js
+++ b/js/lib/index.js
@@ -9,1410 +9,676 @@
// var renderer = new stmd.HtmlRenderer();
// console.log(renderer.render(parser.parse('Hello *world*')));
- var fromCodePoint = require('./from-code-point.js');
- var entityToChar = require('./html5-entities.js').entityToChar;
-
- // Constants for character codes:
-
- var C_NEWLINE = 10;
- var C_SPACE = 32;
- var C_ASTERISK = 42;
- var C_UNDERSCORE = 95;
- var C_BACKTICK = 96;
- var C_OPEN_BRACKET = 91;
- var C_CLOSE_BRACKET = 93;
- var C_LESSTHAN = 60;
- var C_GREATERTHAN = 62;
- var C_BANG = 33;
- var C_BACKSLASH = 92;
- var C_AMPERSAND = 38;
- var C_OPEN_PAREN = 40;
- var C_COLON = 58;
-
- // Some regexps used in inline parser:
-
- var ESCAPABLE = '[!"#$%&\'()*+,./:;<=>?@[\\\\\\]^_`{|}~-]';
- var ESCAPED_CHAR = '\\\\' + ESCAPABLE;
- var IN_DOUBLE_QUOTES = '"(' + ESCAPED_CHAR + '|[^"\\x00])*"';
- var IN_SINGLE_QUOTES = '\'(' + ESCAPED_CHAR + '|[^\'\\x00])*\'';
- var IN_PARENS = '\\((' + ESCAPED_CHAR + '|[^)\\x00])*\\)';
- var REG_CHAR = '[^\\\\()\\x00-\\x20]';
- var IN_PARENS_NOSP = '\\((' + REG_CHAR + '|' + ESCAPED_CHAR + ')*\\)';
- var TAGNAME = '[A-Za-z][A-Za-z0-9]*';
- var BLOCKTAGNAME = '(?:article|header|aside|hgroup|iframe|blockquote|hr|body|li|map|button|object|canvas|ol|caption|output|col|p|colgroup|pre|dd|progress|div|section|dl|table|td|dt|tbody|embed|textarea|fieldset|tfoot|figcaption|th|figure|thead|footer|footer|tr|form|ul|h1|h2|h3|h4|h5|h6|video|script|style)';
- var ATTRIBUTENAME = '[a-zA-Z_:][a-zA-Z0-9:._-]*';
- var UNQUOTEDVALUE = "[^\"'=<>`\\x00-\\x20]+";
- var SINGLEQUOTEDVALUE = "'[^']*'";
- var DOUBLEQUOTEDVALUE = '"[^"]*"';
- var ATTRIBUTEVALUE = "(?:" + UNQUOTEDVALUE + "|" + SINGLEQUOTEDVALUE + "|" + DOUBLEQUOTEDVALUE + ")";
- var ATTRIBUTEVALUESPEC = "(?:" + "\\s*=" + "\\s*" + ATTRIBUTEVALUE + ")";
- var ATTRIBUTE = "(?:" + "\\s+" + ATTRIBUTENAME + ATTRIBUTEVALUESPEC + "?)";
- var OPENTAG = "<" + TAGNAME + ATTRIBUTE + "*" + "\\s*/?>";
- var CLOSETAG = "</" + TAGNAME + "\\s*[>]";
- var OPENBLOCKTAG = "<" + BLOCKTAGNAME + ATTRIBUTE + "*" + "\\s*/?>";
- var CLOSEBLOCKTAG = "</" + BLOCKTAGNAME + "\\s*[>]";
- var HTMLCOMMENT = "<!--([^-]+|[-][^-]+)*-->";
- var PROCESSINGINSTRUCTION = "[<][?].*?[?][>]";
- var DECLARATION = "<![A-Z]+" + "\\s+[^>]*>";
- var CDATA = "<!\\[CDATA\\[([^\\]]+|\\][^\\]]|\\]\\][^>])*\\]\\]>";
- var HTMLTAG = "(?:" + OPENTAG + "|" + CLOSETAG + "|" + HTMLCOMMENT + "|" +
- PROCESSINGINSTRUCTION + "|" + DECLARATION + "|" + CDATA + ")";
- var HTMLBLOCKOPEN = "<(?:" + BLOCKTAGNAME + "[\\s/>]" + "|" +
- "/" + BLOCKTAGNAME + "[\\s>]" + "|" + "[?!])";
- var ENTITY = "&(?:#x[a-f0-9]{1,8}|#[0-9]{1,8}|[a-z][a-z0-9]{1,31});";
-
- var reHtmlTag = new RegExp('^' + HTMLTAG, 'i');
-
- var reHtmlBlockOpen = new RegExp('^' + HTMLBLOCKOPEN, 'i');
-
- var reLinkTitle = new RegExp(
- '^(?:"(' + ESCAPED_CHAR + '|[^"\\x00])*"' +
- '|' +
- '\'(' + ESCAPED_CHAR + '|[^\'\\x00])*\'' +
- '|' +
- '\\((' + ESCAPED_CHAR + '|[^)\\x00])*\\))');
-
- var reLinkDestinationBraces = new RegExp(
- '^(?:[<](?:[^<>\\n\\\\\\x00]' + '|' + ESCAPED_CHAR + '|' + '\\\\)*[>])');
-
- var reLinkDestination = new RegExp(
- '^(?:' + REG_CHAR + '+|' + ESCAPED_CHAR + '|' + IN_PARENS_NOSP + ')*');
-
- var reEscapable = new RegExp(ESCAPABLE);
-
- var reAllEscapedChar = new RegExp('\\\\(' + ESCAPABLE + ')', 'g');
-
- var reEscapedChar = new RegExp('^\\\\(' + ESCAPABLE + ')');
-
- var reAllTab = /\t/g;
-
- var reHrule = /^(?:(?:\* *){3,}|(?:_ *){3,}|(?:- *){3,}) *$/;
-
- var reEntityHere = new RegExp('^' + ENTITY, 'i');
-
- var reEntity = new RegExp(ENTITY, 'gi');
-
- // Matches a character with a special meaning in markdown,
- // or a string of non-special characters. Note: we match
- // clumps of _ or * or `, because they need to be handled in groups.
- var reMain = /^(?:[_*`\n]+|[\[\]\\!<&*_]|(?: *[^\n `\[\]\\!<&*_]+)+|[ \n]+)/m;
-
- // Replace entities and backslash escapes with literal characters.
- var unescapeEntBS = function(s) {
- return s.replace(reAllEscapedChar, '$1')
- .replace(reEntity, entityToChar);
- };
-
- // Returns true if string contains only space characters.
- var isBlank = function(s) {
- return /^\s*$/.test(s);
- };
-
- // Normalize reference label: collapse internal whitespace
- // to single space, remove leading/trailing whitespace, case fold.
- var normalizeReference = function(s) {
- return s.trim()
- .replace(/\s+/,' ')
- .toUpperCase();
- };
-
- // Attempt to match a regex in string s at offset offset.
- // Return index of match or null.
- var matchAt = function(re, s, offset) {
- var res = s.slice(offset).match(re);
- if (res) {
- return offset + res.index;
- } else {
- return null;
- }
- };
-
- // Convert tabs to spaces on each line using a 4-space tab stop.
- var detabLine = function(text) {
- if (text.indexOf('\t') == -1) {
- return text;
- } else {
- var lastStop = 0;
- return text.replace(reAllTab, function(match, offset) {
- var result = ' '.slice((offset - lastStop) % 4);
- lastStop = offset + 1;
- return result;
- });
- }
- };
-
- // INLINE PARSER
-
- // These are methods of an InlineParser object, defined below.
- // An InlineParser keeps track of a subject (a string to be
- // parsed) and a position in that subject.
-
- // If re matches at current position in the subject, advance
- // position in subject and return the match; otherwise return null.
- var match = function(re) {
- var match = re.exec(this.subject.slice(this.pos));
- if (match) {
- this.pos += match.index + match[0].length;
- return match[0];
- } else {
- return null;
- }
- };
-
- // Returns the code for the character at the current subject position, or -1
- // there are no more characters.
- var peek = function() {
- if (this.pos < this.subject.length) {
- return this.subject.charCodeAt(this.pos);
- } else {
- return -1;
- }
- };
-
- // Parse zero or more space characters, including at most one newline
- var spnl = function() {
- this.match(/^ *(?:\n *)?/);
- return 1;
- };
-
- // All of the parsers below try to match something at the current position
- // in the subject. If they succeed in matching anything, they
- // return the inline matched, advancing the subject.
-
- // Attempt to parse backticks, returning either a backtick code span or a
- // literal sequence of backticks.
- var parseBackticks = function(inlines) {
- var startpos = this.pos;
- var ticks = this.match(/^`+/);
- if (!ticks) {
- return 0;
- }
- var afterOpenTicks = this.pos;
- var foundCode = false;
- var match;
- while (!foundCode && (match = this.match(/`+/m))) {
- if (match == ticks) {
- inlines.push({ t: 'Code', c: this.subject.slice(afterOpenTicks,
- this.pos - ticks.length)
- .replace(/[ \n]+/g,' ')
- .trim() });
- return true;
- }
- }
- // If we got here, we didn't match a closing backtick sequence.
- this.pos = afterOpenTicks;
- inlines.push({ t: 'Str', c: ticks });
+var C_GREATERTHAN = 62;
+var C_SPACE = 32;
+var C_OPEN_BRACKET = 91;
+
+var _inlines = require('./inlines');
+
+// Returns true if string contains only space characters.
+var isBlank = function(s) {
+ return /^\s*$/.test(s);
+};
+
+// Convert tabs to spaces on each line using a 4-space tab stop.
+var detabLine = function(text) {
+ if (text.indexOf('\t') == -1) {
+ return text;
+ } else {
+ var lastStop = 0;
+ return text.replace(/\t/g, function(match, offset) {
+ var result = ' '.slice((offset - lastStop) % 4);
+ lastStop = offset + 1;
+ return result;
+ });
+ }
+};
+
+// Attempt to match a regex in string s at offset offset.
+// Return index of match or null.
+var matchAt = function(re, s, offset) {
+ var res = s.slice(offset).match(re);
+ if (res) {
+ return offset + res.index;
+ } else {
+ return null;
+ }
+};
+
+var BLOCKTAGNAME = '(?:article|header|aside|hgroup|iframe|blockquote|hr|body|li|map|button|object|canvas|ol|caption|output|col|p|colgroup|pre|dd|progress|div|section|dl|table|td|dt|tbody|embed|textarea|fieldset|tfoot|figcaption|th|figure|thead|footer|footer|tr|form|ul|h1|h2|h3|h4|h5|h6|video|script|style)';
+var HTMLBLOCKOPEN = "<(?:" + BLOCKTAGNAME + "[\\s/>]" + "|" +
+ "/" + BLOCKTAGNAME + "[\\s>]" + "|" + "[?!])";
+var reHtmlBlockOpen = new RegExp('^' + HTMLBLOCKOPEN, 'i');
+
+var reHrule = /^(?:(?:\* *){3,}|(?:_ *){3,}|(?:- *){3,}) *$/;
+
+
+// DOC PARSER
+
+// These are methods of a DocParser object, defined below.
+
+var makeBlock = function(tag, start_line, start_column) {
+ return { t: tag,
+ open: true,
+ last_line_blank: false,
+ start_line: start_line,
+ start_column: start_column,
+ end_line: start_line,
+ children: [],
+ parent: null,
+ // string_content is formed by concatenating strings, in finalize:
+ string_content: "",
+ strings: [],
+ inline_content: []
+ };
+};
+
+// Returns true if parent block can contain child block.
+var canContain = function(parent_type, child_type) {
+ return ( parent_type == 'Document' ||
+ parent_type == 'BlockQuote' ||
+ parent_type == 'ListItem' ||
+ (parent_type == 'List' && child_type == 'ListItem') );
+};
+
+// Returns true if block type can accept lines of text.
+var acceptsLines = function(block_type) {
+ return ( block_type == 'Paragraph' ||
+ block_type == 'IndentedCode' ||
+ block_type == 'FencedCode' );
+};
+
+// Returns true if block ends with a blank line, descending if needed
+// into lists and sublists.
+var endsWithBlankLine = function(block) {
+ if (block.last_line_blank) {
return true;
- };
-
- // Parse a backslash-escaped special character, adding either the escaped
- // character, a hard line break (if the backslash is followed by a newline),
- // or a literal backslash to the 'inlines' list.
- var parseBackslash = function(inlines) {
- var subj = this.subject,
- pos = this.pos;
- if (subj.charCodeAt(pos) === C_BACKSLASH) {
- if (subj.charAt(pos + 1) === '\n') {
- this.pos = this.pos + 2;
- inlines.push({ t: 'Hardbreak' });
- } else if (reEscapable.test(subj.charAt(pos + 1))) {
- this.pos = this.pos + 2;
- inlines.push({ t: 'Str', c: subj.charAt(pos + 1) });
- } else {
- this.pos++;
- inlines.push({t: 'Str', c: '\\'});
- }
- return true;
- } else {
- return false;
- }
- };
-
- // Attempt to parse an autolink (URL or email in pointy brackets).
- var parseAutolink = function(inlines) {
- var m;
- var dest;
- if ((m = this.match(/^<([a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)>/))) { // email autolink
- dest = m.slice(1,-1);
- inlines.push(
- {t: 'Link',
- label: [{ t: 'Str', c: dest }],
- destination: 'mailto:' + encodeURI(unescape(dest)) });
- return true;
- } else if ((m = this.match(/^<(?:coap|doi|javascript|aaa|aaas|about|acap|cap|cid|crid|data|dav|dict|dns|file|ftp|geo|go|gopher|h323|http|https|iax|icap|im|imap|info|ipp|iris|iris.beep|iris.xpc|iris.xpcs|iris.lwz|ldap|mailto|mid|msrp|msrps|mtqp|mupdate|news|nfs|ni|nih|nntp|opaquelocktoken|pop|pres|rtsp|service|session|shttp|sieve|sip|sips|sms|snmp|soap.beep|soap.beeps|tag|tel|telnet|tftp|thismessage|tn3270|tip|tv|urn|vemmi|ws|wss|xcon|xcon-userid|xmlrpc.beep|xmlrpc.beeps|xmpp|z39.50r|z39.50s|adiumxtra|afp|afs|aim|apt|attachment|aw|beshare|bitcoin|bolo|callto|chrome|chrome-extension|com-eventbrite-attendee|content|cvs|dlna-playsingle|dlna-playcontainer|dtn|dvb|ed2k|facetime|feed|finger|fish|gg|git|gizmoproject|gtalk|hcp|icon|ipn|irc|irc6|ircs|itms|jar|jms|keyparc|lastfm|ldaps|magnet|maps|market|message|mms|ms-help|msnim|mumble|mvn|notes|oid|palm|paparazzi|platform|proxy|psyc|query|res|resource|rmi|rsync|rtmp|secondlife|sftp|sgn|skype|smb|soldat|spotify|ssh|steam|svn|teamspeak|things|udp|unreal|ut2004|ventrilo|view-source|webcal|wtai|wyciwyg|xfire|xri|ymsgr):[^<>\x00-\x20]*>/i))) {
- dest = m.slice(1,-1);
- inlines.push({
- t: 'Link',
- label: [{ t: 'Str', c: dest }],
- destination: encodeURI(unescape(dest)) });
- return true;
- } else {
- return false;
- }
- };
-
- // Attempt to parse a raw HTML tag.
- var parseHtmlTag = function(inlines) {
- var m = this.match(reHtmlTag);
- if (m) {
- inlines.push({ t: 'Html', c: m });
- return true;
- } else {
- return false;
- }
- };
+ }
+ if ((block.t == 'List' || block.t == 'ListItem') && block.children.length > 0) {
+ return endsWithBlankLine(block.children[block.children.length - 1]);
+ } else {
+ return false;
+ }
+};
+
+// Break out of all containing lists, resetting the tip of the
+// document to the parent of the highest list, and finalizing
+// all the lists. (This is used to implement the "two blank lines
+// break of of all lists" feature.)
+var breakOutOfLists = function(block, line_number) {
+ var b = block;
+ var last_list = null;
+ do {
+ if (b.t === 'List') {
+ last_list = b;
+ }
+ b = b.parent;
+ } while (b);
+
+ if (last_list) {
+ while (block != last_list) {
+ this.finalize(block, line_number);
+ block = block.parent;
+ }
+ this.finalize(last_list, line_number);
+ this.tip = last_list.parent;
+ }
+};
+
+// Add a line to the block at the tip. We assume the tip
+// can accept lines -- that check should be done before calling this.
+var addLine = function(ln, offset) {
+ var s = ln.slice(offset);
+ if (!(this.tip.open)) {
+ throw({ msg: "Attempted to add line (" + ln + ") to closed container." });
+ }
+ this.tip.strings.push(s);
+};
+
+// Add block of type tag as a child of the tip. If the tip can't
+// accept children, close and finalize it and try its parent,
+// and so on til we find a block that can accept children.
+var addChild = function(tag, line_number, offset) {
+ while (!canContain(this.tip.t, tag)) {
+ this.finalize(this.tip, line_number);
+ }
- // Scan a sequence of characters with code cc, and return information about
- // the number of delimiters and whether they are positioned such that
- // they can open and/or close emphasis or strong emphasis. A utility
- // function for strong/emph parsing.
- var scanDelims = function(cc) {
- var numdelims = 0;
- var first_close_delims = 0;
- var char_before, char_after, cc_after;
- var startpos = this.pos;
-
- char_before = this.pos === 0 ? '\n' :
- this.subject.charAt(this.pos - 1);
-
- while (this.peek() === cc) {
- numdelims++;
- this.pos++;
+ var column_number = offset + 1; // offset 0 = column 1
+ var newBlock = makeBlock(tag, line_number, column_number);
+ this.tip.children.push(newBlock);
+ newBlock.parent = this.tip;
+ this.tip = newBlock;
+ return newBlock;
+};
+
+// Parse a list marker and return data on the marker (type,
+// start, delimiter, bullet character, padding) or null.
+var parseListMarker = function(ln, offset) {
+ var rest = ln.slice(offset);
+ var match;
+ var spaces_after_marker;
+ var data = {};
+ if (rest.match(reHrule)) {
+ return null;
+ }
+ if ((match = rest.match(/^[*+-]( +|$)/))) {
+ spaces_after_marker = match[1].length;
+ data.type = 'Bullet';
+ data.bullet_char = match[0][0];
+
+ } else if ((match = rest.match(/^(\d+)([.)])( +|$)/))) {
+ spaces_after_marker = match[3].length;
+ data.type = 'Ordered';
+ data.start = parseInt(match[1]);
+ data.delimiter = match[2];
+ } else {
+ return null;
+ }
+ var blank_item = match[0].length === rest.length;
+ if (spaces_after_marker >= 5 ||
+ spaces_after_marker < 1 ||
+ blank_item) {
+ data.padding = match[0].length - spaces_after_marker + 1;
+ } else {
+ data.padding = match[0].length;
+ }
+ return data;
+};
+
+// Returns true if the two list items are of the same type,
+// with the same delimiter and bullet character. This is used
+// in agglomerating list items into lists.
+var listsMatch = function(list_data, item_data) {
+ return (list_data.type === item_data.type &&
+ list_data.delimiter === item_data.delimiter &&
+ list_data.bullet_char === item_data.bullet_char);
+};
+
+// Analyze a line of text and update the document appropriately.
+// We parse markdown text by calling this on each line of input,
+// then finalizing the document.
+var incorporateLine = function(ln, line_number) {
+
+ var all_matched = true;
+ var last_child;
+ var first_nonspace;
+ var offset = 0;
+ var match;
+ var data;
+ var blank;
+ var indent;
+ var last_matched_container;
+ var i;
+ var CODE_INDENT = 4;
+
+ var container = this.doc;
+ var oldtip = this.tip;
+
+ // Convert tabs to spaces:
+ ln = detabLine(ln);
+
+ // For each containing block, try to parse the associated line start.
+ // Bail out on failure: container will point to the last matching block.
+ // Set all_matched to false if not all containers match.
+ while (container.children.length > 0) {
+ last_child = container.children[container.children.length - 1];
+ if (!last_child.open) {
+ break;
}
+ container = last_child;
- cc_after = this.peek();
- if (cc_after === -1) {
- char_after = '\n';
+ match = matchAt(/[^ ]/, ln, offset);
+ if (match === null) {
+ first_nonspace = ln.length;
+ blank = true;
} else {
- char_after = fromCodePoint(cc_after);
- }
-
- var can_open = numdelims > 0 && numdelims <= 3 && !(/\s/.test(char_after));
- var can_close = numdelims > 0 && numdelims <= 3 && !(/\s/.test(char_before));
- if (cc === C_UNDERSCORE) {
- can_open = can_open && !((/[a-z0-9]/i).test(char_before));
- can_close = can_close && !((/[a-z0-9]/i).test(char_after));
- }
- this.pos = startpos;
- return { numdelims: numdelims,
- can_open: can_open,
- can_close: can_close };
- };
-
- var Emph = function(ils) {
- return {t: 'Emph', c: ils};
- };
-
- var Strong = function(ils) {
- return {t: 'Strong', c: ils};
- };
-
- var Str = function(s) {
- return {t: 'Str', c: s};
- };
-
- // Attempt to parse emphasis or strong emphasis.
- var parseEmphasis = function(cc,inlines) {
- var startpos = this.pos;
- var c ;
- var first_close = 0;
- c = fromCodePoint(cc);
-
- var numdelims;
- var numclosedelims;
- var delimpos;
-
- // Get opening delimiters.
- res = this.scanDelims(cc);
- numdelims = res.numdelims;
-
- if (numdelims === 0) {
- this.pos = startpos;
- return false;
- }
-
- if (numdelims >= 4 || !res.can_open) {
- this.pos += numdelims;
- inlines.push(Str(this.subject.slice(startpos, startpos + numdelims)));
- return true;
+ first_nonspace = match;
+ blank = false;
}
+ indent = first_nonspace - offset;
- this.pos += numdelims;
-
- var delims_to_match = numdelims;
-
- var current = [];
- var firstend;
- var firstpos;
- var state = 0;
- var can_close = false;
- var can_open = false;
- var last_emphasis_closer = null;
- while (this.last_emphasis_closer[c] >= this.pos) {
- res = this.scanDelims(cc);
- numclosedelims = res.numdelims;
-
- if (res.can_close) {
- if (last_emphasis_closer === null ||
- last_emphasis_closer < this.pos) {
- last_emphasis_closer = this.pos;
- }
- if (numclosedelims === 3 && delims_to_match === 3) {
- delims_to_match -= 3;
- this.pos += 3;
- current = [{t: 'Strong', c: [{t: 'Emph', c: current}]}];
- } else if (numclosedelims >= 2 && delims_to_match >= 2) {
- delims_to_match -= 2;
- this.pos += 2;
- firstend = current.length;
- firstpos = this.pos;
- current = [{t: 'Strong', c: current}];
- } else if (numclosedelims >= 1 && delims_to_match >= 1) {
- delims_to_match -= 1;
- this.pos += 1;
- firstend = current.length;
- firstpos = this.pos;
- current = [{t: 'Emph', c: current}];
- } else {
- if (!(this.parseInline(current,true))) {
- break;
- }
- }
- if (delims_to_match === 0) {
- Array.prototype.push.apply(inlines, current);
- return true;
+ switch (container.t) {
+ case 'BlockQuote':
+ if (indent <= 3 && ln.charCodeAt(first_nonspace) === C_GREATERTHAN) {
+ offset = first_nonspace + 1;
+ if (ln.charCodeAt(offset) === C_SPACE) {
+ offset++;
}
- } else if (!(this.parseInline(current,true))) {
- break;
- }
- }
-
- // we didn't match emphasis: fallback
- inlines.push(Str(this.subject.slice(startpos,
- startpos + delims_to_match)));
- if (delims_to_match < numdelims) {
- Array.prototype.push.apply(inlines, current.slice(0,firstend));
- this.pos = firstpos;
- } else { // delims_to_match === numdelims
- this.pos = startpos + delims_to_match;
- }
-
- if (last_emphasis_closer) {
- this.last_emphasis_closer[c] = last_emphasis_closer;
- }
- return true;
- };
-
- // Attempt to parse link title (sans quotes), returning the string
- // or null if no match.
- var parseLinkTitle = function() {
- var title = this.match(reLinkTitle);
- if (title) {
- // chop off quotes from title and unescape:
- return unescapeEntBS(title.substr(1, title.length - 2));
- } else {
- return null;
- }
- };
-
- // Attempt to parse link destination, returning the string or
- // null if no match.
- var parseLinkDestination = function() {
- var res = this.match(reLinkDestinationBraces);
- if (res) { // chop off surrounding <..>:
- return encodeURI(unescape(unescapeEntBS(res.substr(1, res.length - 2))));
- } else {
- res = this.match(reLinkDestination);
- if (res !== null) {
- return encodeURI(unescape(unescapeEntBS(res)));
} else {
- return null;
+ all_matched = false;
}
- }
- };
+ break;
- // Attempt to parse a link label, returning number of characters parsed.
- var parseLinkLabel = function() {
- if (this.peek() != C_OPEN_BRACKET) {
- return 0;
- }
- var startpos = this.pos;
- var nest_level = 0;
- if (this.label_nest_level > 0) {
- // If we've already checked to the end of this subject
- // for a label, even with a different starting [, we
- // know we won't find one here and we can just return.
- // This avoids lots of backtracking.
- // Note: nest level 1 would be: [foo [bar]
- // nest level 2 would be: [foo [bar [baz]
- this.label_nest_level--;
- return 0;
- }
- this.pos++; // advance past [
- var c;
- while ((c = this.peek()) && c != -1 && (c != C_CLOSE_BRACKET || nest_level > 0)) {
- switch (c) {
- case C_BACKTICK:
- this.parseBackticks([]);
- break;
- case C_LESSTHAN:
- if (!(this.parseAutolink([]) || this.parseHtmlTag([]))) {
- this.pos++;
- }
- break;
- case C_OPEN_BRACKET: // nested []
- nest_level++;
- this.pos++;
- break;
- case C_CLOSE_BRACKET: // nested []
- nest_level--;
- this.pos++;
- break;
- case C_BACKSLASH:
- this.parseBackslash([]);
- break;
- default:
- this.parseString([]);
- }
- }
- if (c === C_CLOSE_BRACKET) {
- this.label_nest_level = 0;
- this.pos++; // advance past ]
- return this.pos - startpos;
- } else {
- if (c === -1) {
- this.label_nest_level = nest_level;
+ case 'ListItem':
+ if (indent >= container.list_data.marker_offset +
+ container.list_data.padding) {
+ offset += container.list_data.marker_offset +
+ container.list_data.padding;
+ } else if (blank) {
+ offset = first_nonspace;
+ } else {
+ all_matched = false;
}
- this.pos = startpos;
- return 0;
- }
- };
-
- // Parse raw link label, including surrounding [], and return
- // inline contents. (Note: this is not a method of InlineParser.)
- var parseRawLabel = function(s) {
- // note: parse without a refmap; we don't want links to resolve
- // in nested brackets!
- return new InlineParser().parse(s.substr(1, s.length - 2), {});
- };
+ break;
- // Attempt to parse a link. If successful, return the link.
- var parseLink = function(inlines) {
- var startpos = this.pos;
- var reflabel;
- var n;
- var dest;
- var title;
-
- n = this.parseLinkLabel();
- if (n === 0) {
- return false;
- }
- var afterlabel = this.pos;
- var rawlabel = this.subject.substr(startpos, n);
-
- // if we got this far, we've parsed a label.
- // Try to parse an explicit link: [label](url "title")
- if (this.peek() == C_OPEN_PAREN) {
- this.pos++;
- if (this.spnl() &&
- ((dest = this.parseLinkDestination()) !== null) &&
- this.spnl() &&
- // make sure there's a space before the title:
- (/^\s/.test(this.subject.charAt(this.pos - 1)) &&
- (title = this.parseLinkTitle() || '') || true) &&
- this.spnl() &&
- this.match(/^\)/)) {
- inlines.push({ t: 'Link',
- destination: dest,
- title: title,
- label: parseRawLabel(rawlabel) });
- return true;
+ case 'IndentedCode':
+ if (indent >= CODE_INDENT) {
+ offset += CODE_INDENT;
+ } else if (blank) {
+ offset = first_nonspace;
} else {
- this.pos = startpos;
- return false;
+ all_matched = false;
}
- }
- // If we're here, it wasn't an explicit link. Try to parse a reference link.
- // first, see if there's another label
- var savepos = this.pos;
- this.spnl();
- var beforelabel = this.pos;
- n = this.parseLinkLabel();
- if (n == 2) {
- // empty second label
- reflabel = rawlabel;
- } else if (n > 0) {
- reflabel = this.subject.slice(beforelabel, beforelabel + n);
- } else {
- this.pos = savepos;
- reflabel = rawlabel;
- }
- // lookup rawlabel in refmap
- var link = this.refmap[normalizeReference(reflabel)];
- if (link) {
- inlines.push({t: 'Link',
- destination: link.destination,
- title: link.title,
- label: parseRawLabel(rawlabel) });
- return true;
- } else {
- this.pos = startpos;
- return false;
- }
- // Nothing worked, rewind:
- this.pos = startpos;
- return false;
- };
-
- // Attempt to parse an entity, return Entity object if successful.
- var parseEntity = function(inlines) {
- var m;
- if ((m = this.match(reEntityHere))) {
- inlines.push({ t: 'Str', c: entityToChar(m) });
- return true;
- } else {
- return false;
- }
- };
+ break;
- // Parse a run of ordinary characters, or a single character with
- // a special meaning in markdown, as a plain string, adding to inlines.
- var parseString = function(inlines) {
- var m;
- if ((m = this.match(reMain))) {
- inlines.push({ t: 'Str', c: m });
- return true;
- } else {
- return false;
- }
- };
+ case 'ATXHeader':
+ case 'SetextHeader':
+ case 'HorizontalRule':
+ // a header can never container > 1 line, so fail to match:
+ all_matched = false;
+ break;
- // Parse a newline. If it was preceded by two spaces, return a hard
- // line break; otherwise a soft line break.
- var parseNewline = function(inlines) {
- var m = this.match(/^ *\n/);
- if (m) {
- if (m.length > 2) {
- inlines.push({ t: 'Hardbreak' });
- } else if (m.length > 0) {
- inlines.push({ t: 'Softbreak' });
+ case 'FencedCode':
+ // skip optional spaces of fence offset
+ i = container.fence_offset;
+ while (i > 0 && ln.charCodeAt(offset) === C_SPACE) {
+ offset++;
+ i--;
}
- return true;
- }
- return false;
- };
+ break;
- // Attempt to parse an image. If the opening '!' is not followed
- // by a link, return a literal '!'.
- var parseImage = function(inlines) {
- if (this.match(/^!/)) {
- var link = this.parseLink(inlines);
- if (link) {
- inlines[inlines.length - 1].t = 'Image';
- return true;
- } else {
- inlines.push({ t: 'Str', c: '!' });
- return true;
+ case 'HtmlBlock':
+ if (blank) {
+ all_matched = false;
}
- } else {
- return false;
- }
- };
-
- // Attempt to parse a link reference, modifying refmap.
- var parseReference = function(s, refmap) {
- this.subject = s;
- this.pos = 0;
- this.label_nest_level = 0;
- var rawlabel;
- var dest;
- var title;
- var matchChars;
- var startpos = this.pos;
- var match;
-
- // label:
- matchChars = this.parseLinkLabel();
- if (matchChars === 0) {
- return 0;
- } else {
- rawlabel = this.subject.substr(0, matchChars);
- }
-
- // colon:
- if (this.peek() === C_COLON) {
- this.pos++;
- } else {
- this.pos = startpos;
- return 0;
- }
-
- // link url
- this.spnl();
-
- dest = this.parseLinkDestination();
- if (dest === null || dest.length === 0) {
- this.pos = startpos;
- return 0;
- }
-
- var beforetitle = this.pos;
- this.spnl();
- title = this.parseLinkTitle();
- if (title === null) {
- title = '';
- // rewind before spaces
- this.pos = beforetitle;
- }
-
- // make sure we're at line end:
- if (this.match(/^ *(?:\n|$)/) === null) {
- this.pos = startpos;
- return 0;
- }
-
- var normlabel = normalizeReference(rawlabel);
-
- if (!refmap[normlabel]) {
- refmap[normlabel] = { destination: dest, title: title };
- }
- return this.pos - startpos;
- };
-
- // Parse the next inline element in subject, advancing subject position.
- // If memoize is set, memoize the result.
- // On success, add the result to the inlines list, and return true.
- // On failure, return false.
- var parseInline = function(inlines, memoize) {
- var startpos = this.pos;
- var origlen = inlines.length;
- var memoized = memoize && this.memo[startpos];
- if (memoized) {
- this.pos = memoized.endpos;
- Array.prototype.push.apply(inlines, memoized.inline);
- return true;
- }
-
- var c = this.peek();
- if (c === -1) {
- return false;
- }
- var res;
- switch(c) {
- case C_NEWLINE:
- case C_SPACE:
- res = this.parseNewline(inlines);
- break;
- case C_BACKSLASH:
- res = this.parseBackslash(inlines);
- break;
- case C_BACKTICK:
- res = this.parseBackticks(inlines);
- break;
- case C_ASTERISK:
- case C_UNDERSCORE:
- res = this.parseEmphasis(c, inlines);
- break;
- case C_OPEN_BRACKET:
- res = this.parseLink(inlines);
- break;
- case C_BANG:
- res = this.parseImage(inlines);
- break;
- case C_LESSTHAN:
- res = this.parseAutolink(inlines) || this.parseHtmlTag(inlines);
break;
- case C_AMPERSAND:
- res = this.parseEntity(inlines);
- break;
- default:
- res = this.parseString(inlines);
+
+ case 'Paragraph':
+ if (blank) {
+ container.last_line_blank = true;
+ all_matched = false;
+ }
break;
- }
- if (!res) {
- this.pos += 1;
- inlines.push({t: 'Str', c: fromCodePoint(c)});
- }
- if (memoize) {
- this.memo[startpos] = { inline: inlines.slice(origlen),
- endpos: this.pos };
+ default:
}
- return true;
- };
- // Parse s as a list of inlines, using refmap to resolve references.
- var parseInlines = function(s, refmap) {
- this.subject = s;
- this.pos = 0;
- this.refmap = refmap || {};
- this.memo = {};
- this.last_emphasis_closer = { '*': s.length, '_': s.length };
- var inlines = [];
- while (this.parseInline(inlines, false)) {
+ if (!all_matched) {
+ container = container.parent; // back up to last matching block
+ break;
}
- return inlines;
- };
-
- // The InlineParser object.
- function InlineParser(){
- return {
- subject: '',
- label_nest_level: 0, // used by parseLinkLabel method
- last_emphasis_closer: null, // used by parseEmphasis method
- pos: 0,
- refmap: {},
- memo: {},
- match: match,
- peek: peek,
- spnl: spnl,
- parseBackticks: parseBackticks,
- parseBackslash: parseBackslash,
- parseAutolink: parseAutolink,
- parseHtmlTag: parseHtmlTag,
- scanDelims: scanDelims,
- parseEmphasis: parseEmphasis,
- parseLinkTitle: parseLinkTitle,
- parseLinkDestination: parseLinkDestination,
- parseLinkLabel: parseLinkLabel,
- parseLink: parseLink,
- parseEntity: parseEntity,
- parseString: parseString,
- parseNewline: parseNewline,
- parseImage: parseImage,
- parseReference: parseReference,
- parseInline: parseInline,
- parse: parseInlines
- };
}
- // DOC PARSER
-
- // These are methods of a DocParser object, defined below.
-
- var makeBlock = function(tag, start_line, start_column) {
- return { t: tag,
- open: true,
- last_line_blank: false,
- start_line: start_line,
- start_column: start_column,
- end_line: start_line,
- children: [],
- parent: null,
- // string_content is formed by concatenating strings, in finalize:
- string_content: "",
- strings: [],
- inline_content: []
- };
- };
-
- // Returns true if parent block can contain child block.
- var canContain = function(parent_type, child_type) {
- return ( parent_type == 'Document' ||
- parent_type == 'BlockQuote' ||
- parent_type == 'ListItem' ||
- (parent_type == 'List' && child_type == 'ListItem') );
- };
-
- // Returns true if block type can accept lines of text.
- var acceptsLines = function(block_type) {
- return ( block_type == 'Paragraph' ||
- block_type == 'IndentedCode' ||
- block_type == 'FencedCode' );
- };
+ last_matched_container = container;
- // Returns true if block ends with a blank line, descending if needed
- // into lists and sublists.
- var endsWithBlankLine = function(block) {
- if (block.last_line_blank) {
- return true;
- }
- if ((block.t == 'List' || block.t == 'ListItem') && block.children.length > 0) {
- return endsWithBlankLine(block.children[block.children.length - 1]);
- } else {
- return false;
+ // This function is used to finalize and close any unmatched
+ // blocks. We aren't ready to do this now, because we might
+ // have a lazy paragraph continuation, in which case we don't
+ // want to close unmatched blocks. So we store this closure for
+ // use later, when we have more information.
+ var closeUnmatchedBlocks = function(mythis) {
+ // finalize any blocks not matched
+ while (!already_done && oldtip != last_matched_container) {
+ mythis.finalize(oldtip, line_number);
+ oldtip = oldtip.parent;
}
+ var already_done = true;
};
- // Break out of all containing lists, resetting the tip of the
- // document to the parent of the highest list, and finalizing
- // all the lists. (This is used to implement the "two blank lines
- // break of of all lists" feature.)
- var breakOutOfLists = function(block, line_number) {
- var b = block;
- var last_list = null;
- do {
- if (b.t === 'List') {
- last_list = b;
- }
- b = b.parent;
- } while (b);
-
- if (last_list) {
- while (block != last_list) {
- this.finalize(block, line_number);
- block = block.parent;
- }
- this.finalize(last_list, line_number);
- this.tip = last_list.parent;
- }
- };
-
- // Add a line to the block at the tip. We assume the tip
- // can accept lines -- that check should be done before calling this.
- var addLine = function(ln, offset) {
- var s = ln.slice(offset);
- if (!(this.tip.open)) {
- throw({ msg: "Attempted to add line (" + ln + ") to closed container." });
- }
- this.tip.strings.push(s);
- };
-
- // Add block of type tag as a child of the tip. If the tip can't
- // accept children, close and finalize it and try its parent,
- // and so on til we find a block that can accept children.
- var addChild = function(tag, line_number, offset) {
- while (!canContain(this.tip.t, tag)) {
- this.finalize(this.tip, line_number);
- }
+ // Check to see if we've hit 2nd blank line; if so break out of list:
+ if (blank && container.last_line_blank) {
+ this.breakOutOfLists(container, line_number);
+ }
- var column_number = offset + 1; // offset 0 = column 1
- var newBlock = makeBlock(tag, line_number, column_number);
- this.tip.children.push(newBlock);
- newBlock.parent = this.tip;
- this.tip = newBlock;
- return newBlock;
- };
+ // Unless last matched container is a code block, try new container starts,
+ // adding children to the last matched container:
+ while (container.t != 'FencedCode' &&
+ container.t != 'IndentedCode' &&
+ container.t != 'HtmlBlock' &&
+ // this is a little performance optimization:
+ matchAt(/^[ #`~*+_=<>0-9-]/,ln,offset) !== null) {
- // Parse a list marker and return data on the marker (type,
- // start, delimiter, bullet character, padding) or null.
- var parseListMarker = function(ln, offset) {
- var rest = ln.slice(offset);
- var match;
- var spaces_after_marker;
- var data = {};
- if (rest.match(reHrule)) {
- return null;
- }
- if ((match = rest.match(/^[*+-]( +|$)/))) {
- spaces_after_marker = match[1].length;
- data.type = 'Bullet';
- data.bullet_char = match[0][0];
-
- } else if ((match = rest.match(/^(\d+)([.)])( +|$)/))) {
- spaces_after_marker = match[3].length;
- data.type = 'Ordered';
- data.start = parseInt(match[1]);
- data.delimiter = match[2];
- } else {
- return null;
- }
- var blank_item = match[0].length === rest.length;
- if (spaces_after_marker >= 5 ||
- spaces_after_marker < 1 ||
- blank_item) {
- data.padding = match[0].length - spaces_after_marker + 1;
+ match = matchAt(/[^ ]/, ln, offset);
+ if (match === null) {
+ first_nonspace = ln.length;
+ blank = true;
} else {
- data.padding = match[0].length;
+ first_nonspace = match;
+ blank = false;
}
- return data;
- };
-
- // Returns true if the two list items are of the same type,
- // with the same delimiter and bullet character. This is used
- // in agglomerating list items into lists.
- var listsMatch = function(list_data, item_data) {
- return (list_data.type === item_data.type &&
- list_data.delimiter === item_data.delimiter &&
- list_data.bullet_char === item_data.bullet_char);
- };
+ indent = first_nonspace - offset;
- // Analyze a line of text and update the document appropriately.
- // We parse markdown text by calling this on each line of input,
- // then finalizing the document.
- var incorporateLine = function(ln, line_number) {
-
- var all_matched = true;
- var last_child;
- var first_nonspace;
- var offset = 0;
- var match;
- var data;
- var blank;
- var indent;
- var last_matched_container;
- var i;
- var CODE_INDENT = 4;
-
- var container = this.doc;
- var oldtip = this.tip;
-
- // Convert tabs to spaces:
- ln = detabLine(ln);
-
- // For each containing block, try to parse the associated line start.
- // Bail out on failure: container will point to the last matching block.
- // Set all_matched to false if not all containers match.
- while (container.children.length > 0) {
- last_child = container.children[container.children.length - 1];
- if (!last_child.open) {
+ if (indent >= CODE_INDENT) {
+ // indented code
+ if (this.tip.t != 'Paragraph' && !blank) {
+ offset += CODE_INDENT;
+ closeUnmatchedBlocks(this);
+ container = this.addChild('IndentedCode', line_number, offset);
+ } else { // indent > 4 in a lazy paragraph continuation
break;
}
- container = last_child;
- match = matchAt(/[^ ]/, ln, offset);
- if (match === null) {
- first_nonspace = ln.length;
- blank = true;
- } else {
- first_nonspace = match;
- blank = false;
+ } else if (ln.charCodeAt(first_nonspace) === C_GREATERTHAN) {
+ // blockquote
+ offset = first_nonspace + 1;
+ // optional following space
+ if (ln.charCodeAt(offset) === C_SPACE) {
+ offset++;
}
- indent = first_nonspace - offset;
-
- switch (container.t) {
- case 'BlockQuote':
- if (indent <= 3 && ln.charCodeAt(first_nonspace) === C_GREATERTHAN) {
- offset = first_nonspace + 1;
- if (ln.charCodeAt(offset) === C_SPACE) {
- offset++;
- }
- } else {
- all_matched = false;
- }
- break;
+ closeUnmatchedBlocks(this);
+ container = this.addChild('BlockQuote', line_number, offset);
- case 'ListItem':
- if (indent >= container.list_data.marker_offset +
- container.list_data.padding) {
- offset += container.list_data.marker_offset +
- container.list_data.padding;
- } else if (blank) {
- offset = first_nonspace;
- } else {
- all_matched = false;
- }
- break;
+ } else if ((match = ln.slice(first_nonspace).match(/^#{1,6}(?: +|$)/))) {
+ // ATX header
+ offset = first_nonspace + match[0].length;
+ closeUnmatchedBlocks(this);
+ container = this.addChild('ATXHeader', line_number, first_nonspace);
+ container.level = match[0].trim().length; // number of #s
+ // remove trailing ###s:
+ container.strings =
+ [ln.slice(offset).replace(/(?:(\\#) *#*| *#+) *$/,'$1')];
+ break;
- case 'IndentedCode':
- if (indent >= CODE_INDENT) {
- offset += CODE_INDENT;
- } else if (blank) {
- offset = first_nonspace;
- } else {
- all_matched = false;
- }
- break;
+ } else if ((match = ln.slice(first_nonspace).match(/^`{3,}(?!.*`)|^~{3,}(?!.*~)/))) {
+ // fenced code block
+ var fence_length = match[0].length;
+ closeUnmatchedBlocks(this);
+ container = this.addChild('FencedCode', line_number, first_nonspace);
+ container.fence_length = fence_length;
+ container.fence_char = match[0][0];
+ container.fence_offset = first_nonspace - offset;
+ offset = first_nonspace + fence_length;
+ break;
- case 'ATXHeader':
- case 'SetextHeader':
- case 'HorizontalRule':
- // a header can never container > 1 line, so fail to match:
- all_matched = false;
- break;
+ } else if (matchAt(reHtmlBlockOpen, ln, first_nonspace) !== null) {
+ // html block
+ closeUnmatchedBlocks(this);
+ container = this.addChild('HtmlBlock', line_number, first_nonspace);
+ // note, we don't adjust offset because the tag is part of the text
+ break;
- case 'FencedCode':
- // skip optional spaces of fence offset
- i = container.fence_offset;
- while (i > 0 && ln.charCodeAt(offset) === C_SPACE) {
- offset++;
- i--;
- }
- break;
+ } else if (container.t == 'Paragraph' &&
+ container.strings.length === 1 &&
+ ((match = ln.slice(first_nonspace).match(/^(?:=+|-+) *$/)))) {
+ // setext header line
+ closeUnmatchedBlocks(this);
+ container.t = 'SetextHeader'; // convert Paragraph to SetextHeader
+ container.level = match[0][0] === '=' ? 1 : 2;
+ offset = ln.length;
- case 'HtmlBlock':
- if (blank) {
- all_matched = false;
- }
- break;
+ } else if (matchAt(reHrule, ln, first_nonspace) !== null) {
+ // hrule
+ closeUnmatchedBlocks(this);
+ container = this.addChild('HorizontalRule', line_number, first_nonspace);
+ offset = ln.length - 1;
+ break;
- case 'Paragraph':
- if (blank) {
- container.last_line_blank = true;
- all_matched = false;
- }
- break;
+ } else if ((data = parseListMarker(ln, first_nonspace))) {
+ // list item
+ closeUnmatchedBlocks(this);
+ data.marker_offset = indent;
+ offset = first_nonspace + data.padding;
- default:
+ // add the list if needed
+ if (container.t !== 'List' ||
+ !(listsMatch(container.list_data, data))) {
+ container = this.addChild('List', line_number, first_nonspace);
+ container.list_data = data;
}
- if (!all_matched) {
- container = container.parent; // back up to last matching block
- break;
- }
- }
+ // add the list item
+ container = this.addChild('ListItem', line_number, first_nonspace);
+ container.list_data = data;
- last_matched_container = container;
-
- // This function is used to finalize and close any unmatched
- // blocks. We aren't ready to do this now, because we might
- // have a lazy paragraph continuation, in which case we don't
- // want to close unmatched blocks. So we store this closure for
- // use later, when we have more information.
- var closeUnmatchedBlocks = function(mythis) {
- // finalize any blocks not matched
- while (!already_done && oldtip != last_matched_container) {
- mythis.finalize(oldtip, line_number);
- oldtip = oldtip.parent;
- }
- var already_done = true;
- };
+ } else {
+ break;
- // Check to see if we've hit 2nd blank line; if so break out of list:
- if (blank && container.last_line_blank) {
- this.breakOutOfLists(container, line_number);
}
- // Unless last matched container is a code block, try new container starts,
- // adding children to the last matched container:
- while (container.t != 'FencedCode' &&
- container.t != 'IndentedCode' &&
- container.t != 'HtmlBlock' &&
- // this is a little performance optimization:
- matchAt(/^[ #`~*+_=<>0-9-]/,ln,offset) !== null) {
-
- match = matchAt(/[^ ]/, ln, offset);
- if (match === null) {
- first_nonspace = ln.length;
- blank = true;
- } else {
- first_nonspace = match;
- blank = false;
- }
- indent = first_nonspace - offset;
+ if (acceptsLines(container.t)) {
+ // if it's a line container, it can't contain other containers
+ break;
+ }
+ }
- if (indent >= CODE_INDENT) {
- // indented code
- if (this.tip.t != 'Paragraph' && !blank) {
- offset += CODE_INDENT;
- closeUnmatchedBlocks(this);
- container = this.addChild('IndentedCode', line_number, offset);
- } else { // indent > 4 in a lazy paragraph continuation
- break;
- }
+ // What remains at the offset is a text line. Add the text to the
+ // appropriate container.
- } else if (ln.charCodeAt(first_nonspace) === C_GREATERTHAN) {
- // blockquote
- offset = first_nonspace + 1;
- // optional following space
- if (ln.charCodeAt(offset) === C_SPACE) {
- offset++;
- }
- closeUnmatchedBlocks(this);
- container = this.addChild('BlockQuote', line_number, offset);
+ match = matchAt(/[^ ]/, ln, offset);
+ if (match === null) {
+ first_nonspace = ln.length;
+ blank = true;
+ } else {
+ first_nonspace = match;
+ blank = false;
+ }
+ indent = first_nonspace - offset;
- } else if ((match = ln.slice(first_nonspace).match(/^#{1,6}(?: +|$)/))) {
- // ATX header
- offset = first_nonspace + match[0].length;
- closeUnmatchedBlocks(this);
- container = this.addChild('ATXHeader', line_number, first_nonspace);
- container.level = match[0].trim().length; // number of #s
- // remove trailing ###s:
- container.strings =
- [ln.slice(offset).replace(/(?:(\\#) *#*| *#+) *$/,'$1')];
- break;
+ // First check for a lazy paragraph continuation:
+ if (this.tip !== last_matched_container &&
+ !blank &&
+ this.tip.t == 'Paragraph' &&
+ this.tip.strings.length > 0) {
+ // lazy paragraph continuation
- } else if ((match = ln.slice(first_nonspace).match(/^`{3,}(?!.*`)|^~{3,}(?!.*~)/))) {
- // fenced code block
- var fence_length = match[0].length;
- closeUnmatchedBlocks(this);
- container = this.addChild('FencedCode', line_number, first_nonspace);
- container.fence_length = fence_length;
- container.fence_char = match[0][0];
- container.fence_offset = first_nonspace - offset;
- offset = first_nonspace + fence_length;
- break;
+ this.last_line_blank = false;
+ this.addLine(ln, offset);
- } else if (matchAt(reHtmlBlockOpen, ln, first_nonspace) !== null) {
- // html block
- closeUnmatchedBlocks(this);
- container = this.addChild('HtmlBlock', line_number, first_nonspace);
- // note, we don't adjust offset because the tag is part of the text
- break;
+ } else { // not a lazy continuation
- } else if (container.t == 'Paragraph' &&
- container.strings.length === 1 &&
- ((match = ln.slice(first_nonspace).match(/^(?:=+|-+) *$/)))) {
- // setext header line
- closeUnmatchedBlocks(this);
- container.t = 'SetextHeader'; // convert Paragraph to SetextHeader
- container.level = match[0][0] === '=' ? 1 : 2;
- offset = ln.length;
+ // finalize any blocks not matched
+ closeUnmatchedBlocks(this);
- } else if (matchAt(reHrule, ln, first_nonspace) !== null) {
- // hrule
- closeUnmatchedBlocks(this);
- container = this.addChild('HorizontalRule', line_number, first_nonspace);
- offset = ln.length - 1;
- break;
+ // Block quote lines are never blank as they start with >
+ // and we don't count blanks in fenced code for purposes of tight/loose
+ // lists or breaking out of lists. We also don't set last_line_blank
+ // on an empty list item.
+ container.last_line_blank = blank &&
+ !(container.t == 'BlockQuote' ||
+ container.t == 'FencedCode' ||
+ (container.t == 'ListItem' &&
+ container.children.length === 0 &&
+ container.start_line == line_number));
- } else if ((data = parseListMarker(ln, first_nonspace))) {
- // list item
- closeUnmatchedBlocks(this);
- data.marker_offset = indent;
- offset = first_nonspace + data.padding;
-
- // add the list if needed
- if (container.t !== 'List' ||
- !(listsMatch(container.list_data, data))) {
- container = this.addChild('List', line_number, first_nonspace);
- container.list_data = data;
- }
+ var cont = container;
+ while (cont.parent) {
+ cont.parent.last_line_blank = false;
+ cont = cont.parent;
+ }
- // add the list item
- container = this.addChild('ListItem', line_number, first_nonspace);
- container.list_data = data;
+ switch (container.t) {
+ case 'IndentedCode':
+ case 'HtmlBlock':
+ this.addLine(ln, offset);
+ break;
+ case 'FencedCode':
+ // check for closing code fence:
+ match = (indent <= 3 &&
+ ln.charAt(first_nonspace) == container.fence_char &&
+ ln.slice(first_nonspace).match(/^(?:`{3,}|~{3,})(?= *$)/));
+ if (match && match[0].length >= container.fence_length) {
+ // don't add closing fence to container; instead, close it:
+ this.finalize(container, line_number);
} else {
- break;
-
- }
-
- if (acceptsLines(container.t)) {
- // if it's a line container, it can't contain other containers
- break;
+ this.addLine(ln, offset);
}
- }
-
- // What remains at the offset is a text line. Add the text to the
- // appropriate container.
-
- match = matchAt(/[^ ]/, ln, offset);
- if (match === null) {
- first_nonspace = ln.length;
- blank = true;
- } else {
- first_nonspace = match;
- blank = false;
- }
- indent = first_nonspace - offset;
-
- // First check for a lazy paragraph continuation:
- if (this.tip !== last_matched_container &&
- !blank &&
- this.tip.t == 'Paragraph' &&
- this.tip.strings.length > 0) {
- // lazy paragraph continuation
-
- this.last_line_blank = false;
- this.addLine(ln, offset);
+ break;
- } else { // not a lazy continuation
+ case 'ATXHeader':
+ case 'SetextHeader':
+ case 'HorizontalRule':
+ // nothing to do; we already added the contents.
+ break;
- // finalize any blocks not matched
- closeUnmatchedBlocks(this);
+ default:
+ if (acceptsLines(container.t)) {
+ this.addLine(ln, first_nonspace);
+ } else if (blank) {
+ // do nothing
+ } else if (container.t != 'HorizontalRule' &&
+ container.t != 'SetextHeader') {
+ // create paragraph container for line
+ container = this.addChild('Paragraph', line_number, first_nonspace);
+ this.addLine(ln, first_nonspace);
+ } else {
+ console.log("Line " + line_number.toString() +
+ " with container type " + container.t +
+ " did not match any condition.");
- // Block quote lines are never blank as they start with >
- // and we don't count blanks in fenced code for purposes of tight/loose
- // lists or breaking out of lists. We also don't set last_line_blank
- // on an empty list item.
- container.last_line_blank = blank &&
- !(container.t == 'BlockQuote' ||
- container.t == 'FencedCode' ||
- (container.t == 'ListItem' &&
- container.children.length === 0 &&
- container.start_line == line_number));
-
- var cont = container;
- while (cont.parent) {
- cont.parent.last_line_blank = false;
- cont = cont.parent;
}
+ }
+ }
+};
+
+// Finalize a block. Close it and do any necessary postprocessing,
+// e.g. creating string_content from strings, setting the 'tight'
+// or 'loose' status of a list, and parsing the beginnings
+// of paragraphs for reference definitions. Reset the tip to the
+// parent of the closed block.
+var finalize = function(block, line_number) {
+ var pos;
+ // don't do anything if the block is already closed
+ if (!block.open) {
+ return 0;
+ }
+ block.open = false;
+ if (line_number > block.start_line) {
+ block.end_line = line_number - 1;
+ } else {
+ block.end_line = line_number;
+ }
- switch (container.t) {
- case 'IndentedCode':
- case 'HtmlBlock':
- this.addLine(ln, offset);
- break;
-
- case 'FencedCode':
- // check for closing code fence:
- match = (indent <= 3 &&
- ln.charAt(first_nonspace) == container.fence_char &&
- ln.slice(first_nonspace).match(/^(?:`{3,}|~{3,})(?= *$)/));
- if (match && match[0].length >= container.fence_length) {
- // don't add closing fence to container; instead, close it:
- this.finalize(container, line_number);
- } else {
- this.addLine(ln, offset);
- }
- break;
-
- case 'ATXHeader':
- case 'SetextHeader':
- case 'HorizontalRule':
- // nothing to do; we already added the contents.
+ switch (block.t) {
+ case 'Paragraph':
+ block.string_content = block.strings.join('\n').replace(/^ */m,'');
+
+ // try parsing the beginning as link reference definitions:
+ while (block.string_content.charCodeAt(0) === C_OPEN_BRACKET &&
+ (pos = this.inlineParser.parseReference(block.string_content,
+ this.refmap))) {
+ block.string_content = block.string_content.slice(pos);
+ if (isBlank(block.string_content)) {
+ block.t = 'ReferenceDef';
break;
-
- default:
- if (acceptsLines(container.t)) {
- this.addLine(ln, first_nonspace);
- } else if (blank) {
- // do nothing
- } else if (container.t != 'HorizontalRule' &&
- container.t != 'SetextHeader') {
- // create paragraph container for line
- container = this.addChild('Paragraph', line_number, first_nonspace);
- this.addLine(ln, first_nonspace);
- } else {
- console.log("Line " + line_number.toString() +
- " with container type " + container.t +
- " did not match any condition.");
-
- }
}
}
- };
+ break;
- // Finalize a block. Close it and do any necessary postprocessing,
- // e.g. creating string_content from strings, setting the 'tight'
- // or 'loose' status of a list, and parsing the beginnings
- // of paragraphs for reference definitions. Reset the tip to the
- // parent of the closed block.
- var finalize = function(block, line_number) {
- var pos;
- // don't do anything if the block is already closed
- if (!block.open) {
- return 0;
- }
- block.open = false;
- if (line_number > block.start_line) {
- block.end_line = line_number - 1;
- } else {
- block.end_line = line_number;
- }
+ case 'ATXHeader':
+ case 'SetextHeader':
+ case 'HtmlBlock':
+ block.string_content = block.strings.join('\n');
+ break;
- switch (block.t) {
- case 'Paragraph':
- block.string_content = block.strings.join('\n').replace(/^ */m,'');
-
- // try parsing the beginning as link reference definitions:
- while (block.string_content.charCodeAt(0) === C_OPEN_BRACKET &&
- (pos = this.inlineParser.parseReference(block.string_content,
- this.refmap))) {
- block.string_content = block.string_content.slice(pos);
- if (isBlank(block.string_content)) {
- block.t = 'ReferenceDef';
- break;
- }
- }
- break;
+ case 'IndentedCode':
+ block.string_content = block.strings.join('\n').replace(/(\n *)*$/,'\n');
+ break;
- case 'ATXHeader':
- case 'SetextHeader':
- case 'HtmlBlock':
- block.string_content = block.strings.join('\n');
- break;
+ case 'FencedCode':
+ // first line becomes info string
+ block.info = _inlines.unescapeEntBS(block.strings[0].trim());
+ if (block.strings.length == 1) {
+ block.string_content = '';
+ } else {
+ block.string_content = block.strings.slice(1).join('\n') + '\n';
+ }
+ break;
- case 'IndentedCode':
- block.string_content = block.strings.join('\n').replace(/(\n *)*$/,'\n');
- break;
+ case 'List':
+ block.tight = true; // tight by default
- case 'FencedCode':
- // first line becomes info string
- block.info = unescapeEntBS(block.strings[0].trim());
- if (block.strings.length == 1) {
- block.string_content = '';
- } else {
- block.string_content = block.strings.slice(1).join('\n') + '\n';
+ var numitems = block.children.length;
+ var i = 0;
+ while (i < numitems) {
+ var item = block.children[i];
+ // check for non-final list item ending with blank line:
+ var last_item = i == numitems - 1;
+ if (endsWithBlankLine(item) && !last_item) {
+ block.tight = false;
+ break;
}
- break;
-
- case 'List':
- block.tight = true; // tight by default
-
- var numitems = block.children.length;
- var i = 0;
- while (i < numitems) {
- var item = block.children[i];
- // check for non-final list item ending with blank line:
- var last_item = i == numitems - 1;
- if (endsWithBlankLine(item) && !last_item) {
+ // recurse into children of list item, to see if there are
+ // spaces between any of them:
+ var numsubitems = item.children.length;
+ var j = 0;
+ while (j < numsubitems) {
+ var subitem = item.children[j];
+ var last_subitem = j == numsubitems - 1;
+ if (endsWithBlankLine(subitem) && !(last_item && last_subitem)) {
block.tight = false;
break;
}
- // recurse into children of list item, to see if there are
- // spaces between any of them:
- var numsubitems = item.children.length;
- var j = 0;
- while (j < numsubitems) {
- var subitem = item.children[j];
- var last_subitem = j == numsubitems - 1;
- if (endsWithBlankLine(subitem) && !(last_item && last_subitem)) {
- block.tight = false;
- break;
- }
- j++;
- }
- i++;
+ j++;
}
- break;
-
- default:
- break;
- }
-
- this.tip = block.parent || this.top;
- };
-
- // Walk through a block & children recursively, parsing string content
- // into inline content where appropriate.
- var processInlines = function(block) {
- switch(block.t) {
- case 'Paragraph':
- case 'SetextHeader':
- case 'ATXHeader':
- block.inline_content =
- this.inlineParser.parse(block.string_content.trim(), this.refmap);
- block.string_content = "";
- break;
- default:
- break;
+ i++;
}
+ break;
- if (block.children) {
- for (var i = 0; i < block.children.length; i++) {
- this.processInlines(block.children[i]);
- }
- }
+ default:
+ break;
+ }
- };
+ this.tip = block.parent || this.top;
+};
+
+// Walk through a block & children recursively, parsing string content
+// into inline content where appropriate.
+var processInlines = function(block) {
+ switch(block.t) {
+ case 'Paragraph':
+ case 'SetextHeader':
+ case 'ATXHeader':
+ block.inline_content =
+ this.inlineParser.parse(block.string_content.trim(), this.refmap);
+ block.string_content = "";
+ break;
+ default:
+ break;
+ }
- // The main parsing function. Returns a parsed document AST.
- var parse = function(input) {
- this.doc = makeBlock('Document', 1, 1);
- this.tip = this.doc;
- this.refmap = {};
- var lines = input.replace(/\n$/,'').split(/\r\n|\n|\r/);
- var len = lines.length;
- for (var i = 0; i < len; i++) {
- this.incorporateLine(lines[i], i+1);
+ if (block.children) {
+ for (var i = 0; i < block.children.length; i++) {
+ this.processInlines(block.children[i]);
}
- while (this.tip) {
- this.finalize(this.tip, len - 1);
- }
- this.processInlines(this.doc);
- return this.doc;
- };
-
-
- // The DocParser object.
- function DocParser(){
- return {
- doc: makeBlock('Document', 1, 1),
- tip: this.doc,
- refmap: {},
- inlineParser: new InlineParser(),
- breakOutOfLists: breakOutOfLists,
- addLine: addLine,
- addChild: addChild,
- incorporateLine: incorporateLine,
- finalize: finalize,
- processInlines: processInlines,
- parse: parse
- };
}
- module.exports.DocParser = DocParser;
- module.exports.HtmlRenderer = require('./html-renderer.js');
+};
+
+// The main parsing function. Returns a parsed document AST.
+var parse = function(input) {
+ this.doc = makeBlock('Document', 1, 1);
+ this.tip = this.doc;
+ this.refmap = {};
+ var lines = input.replace(/\n$/,'').split(/\r\n|\n|\r/);
+ var len = lines.length;
+ for (var i = 0; i < len; i++) {
+ this.incorporateLine(lines[i], i+1);
+ }
+ while (this.tip) {
+ this.finalize(this.tip, len - 1);
+ }
+ this.processInlines(this.doc);
+ return this.doc;
+};
+
+
+// The DocParser object.
+function DocParser(){
+ return {
+ doc: makeBlock('Document', 1, 1),
+ tip: this.doc,
+ refmap: {},
+ inlineParser: new _inlines.InlineParser(),
+ breakOutOfLists: breakOutOfLists,
+ addLine: addLine,
+ addChild: addChild,
+ incorporateLine: incorporateLine,
+ finalize: finalize,
+ processInlines: processInlines,
+ parse: parse
+ };
+}
+
+module.exports.DocParser = DocParser;
+module.exports.HtmlRenderer = require('./html-renderer.js');
diff --git a/js/lib/inlines.js b/js/lib/inlines.js
new file mode 100644
index 0000000..0e79556
--- /dev/null
+++ b/js/lib/inlines.js
@@ -0,0 +1,739 @@
+var fromCodePoint = require('./from-code-point.js');
+var entityToChar = require('./html5-entities.js').entityToChar;
+
+// Constants for character codes:
+
+var C_NEWLINE = 10;
+var C_SPACE = 32;
+var C_ASTERISK = 42;
+var C_UNDERSCORE = 95;
+var C_BACKTICK = 96;
+var C_OPEN_BRACKET = 91;
+var C_CLOSE_BRACKET = 93;
+var C_LESSTHAN = 60;
+var C_GREATERTHAN = 62;
+var C_BANG = 33;
+var C_BACKSLASH = 92;
+var C_AMPERSAND = 38;
+var C_OPEN_PAREN = 40;
+var C_COLON = 58;
+
+// Some regexps used in inline parser:
+
+var ESCAPABLE = '[!"#$%&\'()*+,./:;<=>?@[\\\\\\]^_`{|}~-]';
+var ESCAPED_CHAR = '\\\\' + ESCAPABLE;
+var IN_DOUBLE_QUOTES = '"(' + ESCAPED_CHAR + '|[^"\\x00])*"';
+var IN_SINGLE_QUOTES = '\'(' + ESCAPED_CHAR + '|[^\'\\x00])*\'';
+var IN_PARENS = '\\((' + ESCAPED_CHAR + '|[^)\\x00])*\\)';
+var REG_CHAR = '[^\\\\()\\x00-\\x20]';
+var IN_PARENS_NOSP = '\\((' + REG_CHAR + '|' + ESCAPED_CHAR + ')*\\)';
+var TAGNAME = '[A-Za-z][A-Za-z0-9]*';
+var ATTRIBUTENAME = '[a-zA-Z_:][a-zA-Z0-9:._-]*';
+var UNQUOTEDVALUE = "[^\"'=<>`\\x00-\\x20]+";
+var SINGLEQUOTEDVALUE = "'[^']*'";
+var DOUBLEQUOTEDVALUE = '"[^"]*"';
+var ATTRIBUTEVALUE = "(?:" + UNQUOTEDVALUE + "|" + SINGLEQUOTEDVALUE + "|" + DOUBLEQUOTEDVALUE + ")";
+var ATTRIBUTEVALUESPEC = "(?:" + "\\s*=" + "\\s*" + ATTRIBUTEVALUE + ")";
+var ATTRIBUTE = "(?:" + "\\s+" + ATTRIBUTENAME + ATTRIBUTEVALUESPEC + "?)";
+var OPENTAG = "<" + TAGNAME + ATTRIBUTE + "*" + "\\s*/?>";
+var CLOSETAG = "</" + TAGNAME + "\\s*[>]";
+var HTMLCOMMENT = "<!--([^-]+|[-][^-]+)*-->";
+var PROCESSINGINSTRUCTION = "[<][?].*?[?][>]";
+var DECLARATION = "<![A-Z]+" + "\\s+[^>]*>";
+var CDATA = "<!\\[CDATA\\[([^\\]]+|\\][^\\]]|\\]\\][^>])*\\]\\]>";
+var HTMLTAG = "(?:" + OPENTAG + "|" + CLOSETAG + "|" + HTMLCOMMENT + "|" +
+ PROCESSINGINSTRUCTION + "|" + DECLARATION + "|" + CDATA + ")";
+var ENTITY = "&(?:#x[a-f0-9]{1,8}|#[0-9]{1,8}|[a-z][a-z0-9]{1,31});";
+
+var reHtmlTag = new RegExp('^' + HTMLTAG, 'i');
+
+var reLinkTitle = new RegExp(
+ '^(?:"(' + ESCAPED_CHAR + '|[^"\\x00])*"' +
+ '|' +
+ '\'(' + ESCAPED_CHAR + '|[^\'\\x00])*\'' +
+ '|' +
+ '\\((' + ESCAPED_CHAR + '|[^)\\x00])*\\))');
+
+var reLinkDestinationBraces = new RegExp(
+ '^(?:[<](?:[^<>\\n\\\\\\x00]' + '|' + ESCAPED_CHAR + '|' + '\\\\)*[>])');
+
+var reLinkDestination = new RegExp(
+ '^(?:' + REG_CHAR + '+|' + ESCAPED_CHAR + '|' + IN_PARENS_NOSP + ')*');
+
+var reEscapable = new RegExp(ESCAPABLE);
+
+var reAllEscapedChar = new RegExp('\\\\(' + ESCAPABLE + ')', 'g');
+
+var reEscapedChar = new RegExp('^\\\\(' + ESCAPABLE + ')');
+
+var reEntityHere = new RegExp('^' + ENTITY, 'i');
+
+var reEntity = new RegExp(ENTITY, 'gi');
+
+// Matches a character with a special meaning in markdown,
+// or a string of non-special characters. Note: we match
+// clumps of _ or * or `, because they need to be handled in groups.
+var reMain = /^(?:[_*`\n]+|[\[\]\\!<&*_]|(?: *[^\n `\[\]\\!<&*_]+)+|[ \n]+)/m;
+
+// Replace entities and backslash escapes with literal characters.
+var unescapeEntBS = function(s) {
+ return s.replace(reAllEscapedChar, '$1')
+ .replace(reEntity, entityToChar);
+};
+
+// Normalize reference label: collapse internal whitespace
+// to single space, remove leading/trailing whitespace, case fold.
+var normalizeReference = function(s) {
+ return s.trim()
+ .replace(/\s+/,' ')
+ .toUpperCase();
+};
+
+// INLINE PARSER
+
+// These are methods of an InlineParser object, defined below.
+// An InlineParser keeps track of a subject (a string to be
+// parsed) and a position in that subject.
+
+// If re matches at current position in the subject, advance
+// position in subject and return the match; otherwise return null.
+var match = function(re) {
+ var match = re.exec(this.subject.slice(this.pos));
+ if (match) {
+ this.pos += match.index + match[0].length;
+ return match[0];
+ } else {
+ return null;
+ }
+};
+
+// Returns the code for the character at the current subject position, or -1
+// there are no more characters.
+var peek = function() {
+ if (this.pos < this.subject.length) {
+ return this.subject.charCodeAt(this.pos);
+ } else {
+ return -1;
+ }
+};
+
+// Parse zero or more space characters, including at most one newline
+var spnl = function() {
+ this.match(/^ *(?:\n *)?/);
+ return 1;
+};
+
+// All of the parsers below try to match something at the current position
+// in the subject. If they succeed in matching anything, they
+// return the inline matched, advancing the subject.
+
+// Attempt to parse backticks, returning either a backtick code span or a
+// literal sequence of backticks.
+var parseBackticks = function(inlines) {
+ var startpos = this.pos;
+ var ticks = this.match(/^`+/);
+ if (!ticks) {
+ return 0;
+ }
+ var afterOpenTicks = this.pos;
+ var foundCode = false;
+ var match;
+ while (!foundCode && (match = this.match(/`+/m))) {
+ if (match == ticks) {
+ inlines.push({ t: 'Code', c: this.subject.slice(afterOpenTicks,
+ this.pos - ticks.length)
+ .replace(/[ \n]+/g,' ')
+ .trim() });
+ return true;
+ }
+ }
+ // If we got here, we didn't match a closing backtick sequence.
+ this.pos = afterOpenTicks;
+ inlines.push({ t: 'Str', c: ticks });
+ return true;
+};
+
+// Parse a backslash-escaped special character, adding either the escaped
+// character, a hard line break (if the backslash is followed by a newline),
+// or a literal backslash to the 'inlines' list.
+var parseBackslash = function(inlines) {
+ var subj = this.subject,
+ pos = this.pos;
+ if (subj.charCodeAt(pos) === C_BACKSLASH) {
+ if (subj.charAt(pos + 1) === '\n') {
+ this.pos = this.pos + 2;
+ inlines.push({ t: 'Hardbreak' });
+ } else if (reEscapable.test(subj.charAt(pos + 1))) {
+ this.pos = this.pos + 2;
+ inlines.push({ t: 'Str', c: subj.charAt(pos + 1) });
+ } else {
+ this.pos++;
+ inlines.push({t: 'Str', c: '\\'});
+ }
+ return true;
+ } else {
+ return false;
+ }
+};
+
+// Attempt to parse an autolink (URL or email in pointy brackets).
+var parseAutolink = function(inlines) {
+ var m;
+ var dest;
+ if ((m = this.match(/^<([a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)>/))) { // email autolink
+ dest = m.slice(1,-1);
+ inlines.push(
+ {t: 'Link',
+ label: [{ t: 'Str', c: dest }],
+ destination: 'mailto:' + encodeURI(unescape(dest)) });
+ return true;
+ } else if ((m = this.match(/^<(?:coap|doi|javascript|aaa|aaas|about|acap|cap|cid|crid|data|dav|dict|dns|file|ftp|geo|go|gopher|h323|http|https|iax|icap|im|imap|info|ipp|iris|iris.beep|iris.xpc|iris.xpcs|iris.lwz|ldap|mailto|mid|msrp|msrps|mtqp|mupdate|news|nfs|ni|nih|nntp|opaquelocktoken|pop|pres|rtsp|service|session|shttp|sieve|sip|sips|sms|snmp|soap.beep|soap.beeps|tag|tel|telnet|tftp|thismessage|tn3270|tip|tv|urn|vemmi|ws|wss|xcon|xcon-userid|xmlrpc.beep|xmlrpc.beeps|xmpp|z39.50r|z39.50s|adiumxtra|afp|afs|aim|apt|attachment|aw|beshare|bitcoin|bolo|callto|chrome|chrome-extension|com-eventbrite-attendee|content|cvs|dlna-playsingle|dlna-playcontainer|dtn|dvb|ed2k|facetime|feed|finger|fish|gg|git|gizmoproject|gtalk|hcp|icon|ipn|irc|irc6|ircs|itms|jar|jms|keyparc|lastfm|ldaps|magnet|maps|market|message|mms|ms-help|msnim|mumble|mvn|notes|oid|palm|paparazzi|platform|proxy|psyc|query|res|resource|rmi|rsync|rtmp|secondlife|sftp|sgn|skype|smb|soldat|spotify|ssh|steam|svn|teamspeak|things|udp|unreal|ut2004|ventrilo|view-source|webcal|wtai|wyciwyg|xfire|xri|ymsgr):[^<>\x00-\x20]*>/i))) {
+ dest = m.slice(1,-1);
+ inlines.push({
+ t: 'Link',
+ label: [{ t: 'Str', c: dest }],
+ destination: encodeURI(unescape(dest)) });
+ return true;
+ } else {
+ return false;
+ }
+};
+
+// Attempt to parse a raw HTML tag.
+var parseHtmlTag = function(inlines) {
+ var m = this.match(reHtmlTag);
+ if (m) {
+ inlines.push({ t: 'Html', c: m });
+ return true;
+ } else {
+ return false;
+ }
+};
+
+// Scan a sequence of characters with code cc, and return information about
+// the number of delimiters and whether they are positioned such that
+// they can open and/or close emphasis or strong emphasis. A utility
+// function for strong/emph parsing.
+var scanDelims = function(cc) {
+ var numdelims = 0;
+ var first_close_delims = 0;
+ var char_before, char_after, cc_after;
+ var startpos = this.pos;
+
+ char_before = this.pos === 0 ? '\n' :
+ this.subject.charAt(this.pos - 1);
+
+ while (this.peek() === cc) {
+ numdelims++;
+ this.pos++;
+ }
+
+ cc_after = this.peek();
+ if (cc_after === -1) {
+ char_after = '\n';
+ } else {
+ char_after = fromCodePoint(cc_after);
+ }
+
+ var can_open = numdelims > 0 && numdelims <= 3 && !(/\s/.test(char_after));
+ var can_close = numdelims > 0 && numdelims <= 3 && !(/\s/.test(char_before));
+ if (cc === C_UNDERSCORE) {
+ can_open = can_open && !((/[a-z0-9]/i).test(char_before));
+ can_close = can_close && !((/[a-z0-9]/i).test(char_after));
+ }
+ this.pos = startpos;
+ return { numdelims: numdelims,
+ can_open: can_open,
+ can_close: can_close };
+};
+
+var Emph = function(ils) {
+ return {t: 'Emph', c: ils};
+};
+
+var Strong = function(ils) {
+ return {t: 'Strong', c: ils};
+};
+
+var Str = function(s) {
+ return {t: 'Str', c: s};
+};
+
+// Attempt to parse emphasis or strong emphasis.
+var parseEmphasis = function(cc,inlines) {
+ var startpos = this.pos;
+ var c ;
+ var first_close = 0;
+ c = fromCodePoint(cc);
+
+ var numdelims;
+ var numclosedelims;
+ var delimpos;
+
+ // Get opening delimiters.
+ res = this.scanDelims(cc);
+ numdelims = res.numdelims;
+
+ if (numdelims === 0) {
+ this.pos = startpos;
+ return false;
+ }
+
+ if (numdelims >= 4 || !res.can_open) {
+ this.pos += numdelims;
+ inlines.push(Str(this.subject.slice(startpos, startpos + numdelims)));
+ return true;
+ }
+
+ this.pos += numdelims;
+
+ var delims_to_match = numdelims;
+
+ var current = [];
+ var firstend;
+ var firstpos;
+ var state = 0;
+ var can_close = false;
+ var can_open = false;
+ var last_emphasis_closer = null;
+ while (this.last_emphasis_closer[c] >= this.pos) {
+ res = this.scanDelims(cc);
+ numclosedelims = res.numdelims;
+
+ if (res.can_close) {
+ if (last_emphasis_closer === null ||
+ last_emphasis_closer < this.pos) {
+ last_emphasis_closer = this.pos;
+ }
+ if (numclosedelims === 3 && delims_to_match === 3) {
+ delims_to_match -= 3;
+ this.pos += 3;
+ current = [{t: 'Strong', c: [{t: 'Emph', c: current}]}];
+ } else if (numclosedelims >= 2 && delims_to_match >= 2) {
+ delims_to_match -= 2;
+ this.pos += 2;
+ firstend = current.length;
+ firstpos = this.pos;
+ current = [{t: 'Strong', c: current}];
+ } else if (numclosedelims >= 1 && delims_to_match >= 1) {
+ delims_to_match -= 1;
+ this.pos += 1;
+ firstend = current.length;
+ firstpos = this.pos;
+ current = [{t: 'Emph', c: current}];
+ } else {
+ if (!(this.parseInline(current,true))) {
+ break;
+ }
+ }
+ if (delims_to_match === 0) {
+ Array.prototype.push.apply(inlines, current);
+ return true;
+ }
+ } else if (!(this.parseInline(current,true))) {
+ break;
+ }
+ }
+
+ // we didn't match emphasis: fallback
+ inlines.push(Str(this.subject.slice(startpos,
+ startpos + delims_to_match)));
+ if (delims_to_match < numdelims) {
+ Array.prototype.push.apply(inlines, current.slice(0,firstend));
+ this.pos = firstpos;
+ } else { // delims_to_match === numdelims
+ this.pos = startpos + delims_to_match;
+ }
+
+ if (last_emphasis_closer) {
+ this.last_emphasis_closer[c] = last_emphasis_closer;
+ }
+ return true;
+};
+
+// Attempt to parse link title (sans quotes), returning the string
+// or null if no match.
+var parseLinkTitle = function() {
+ var title = this.match(reLinkTitle);
+ if (title) {
+ // chop off quotes from title and unescape:
+ return unescapeEntBS(title.substr(1, title.length - 2));
+ } else {
+ return null;
+ }
+};
+
+// Attempt to parse link destination, returning the string or
+// null if no match.
+var parseLinkDestination = function() {
+ var res = this.match(reLinkDestinationBraces);
+ if (res) { // chop off surrounding <..>:
+ return encodeURI(unescape(unescapeEntBS(res.substr(1, res.length - 2))));
+ } else {
+ res = this.match(reLinkDestination);
+ if (res !== null) {
+ return encodeURI(unescape(unescapeEntBS(res)));
+ } else {
+ return null;
+ }
+ }
+};
+
+// Attempt to parse a link label, returning number of characters parsed.
+var parseLinkLabel = function() {
+ if (this.peek() != C_OPEN_BRACKET) {
+ return 0;
+ }
+ var startpos = this.pos;
+ var nest_level = 0;
+ if (this.label_nest_level > 0) {
+ // If we've already checked to the end of this subject
+ // for a label, even with a different starting [, we
+ // know we won't find one here and we can just return.
+ // This avoids lots of backtracking.
+ // Note: nest level 1 would be: [foo [bar]
+ // nest level 2 would be: [foo [bar [baz]
+ this.label_nest_level--;
+ return 0;
+ }
+ this.pos++; // advance past [
+ var c;
+ while ((c = this.peek()) && c != -1 && (c != C_CLOSE_BRACKET || nest_level > 0)) {
+ switch (c) {
+ case C_BACKTICK:
+ this.parseBackticks([]);
+ break;
+ case C_LESSTHAN:
+ if (!(this.parseAutolink([]) || this.parseHtmlTag([]))) {
+ this.pos++;
+ }
+ break;
+ case C_OPEN_BRACKET: // nested []
+ nest_level++;
+ this.pos++;
+ break;
+ case C_CLOSE_BRACKET: // nested []
+ nest_level--;
+ this.pos++;
+ break;
+ case C_BACKSLASH:
+ this.parseBackslash([]);
+ break;
+ default:
+ this.parseString([]);
+ }
+ }
+ if (c === C_CLOSE_BRACKET) {
+ this.label_nest_level = 0;
+ this.pos++; // advance past ]
+ return this.pos - startpos;
+ } else {
+ if (c === -1) {
+ this.label_nest_level = nest_level;
+ }
+ this.pos = startpos;
+ return 0;
+ }
+};
+
+// Parse raw link label, including surrounding [], and return
+// inline contents. (Note: this is not a method of InlineParser.)
+var parseRawLabel = function(s) {
+ // note: parse without a refmap; we don't want links to resolve
+ // in nested brackets!
+ return new InlineParser().parse(s.substr(1, s.length - 2), {});
+};
+
+// Attempt to parse a link. If successful, return the link.
+var parseLink = function(inlines) {
+ var startpos = this.pos;
+ var reflabel;
+ var n;
+ var dest;
+ var title;
+
+ n = this.parseLinkLabel();
+ if (n === 0) {
+ return false;
+ }
+ var afterlabel = this.pos;
+ var rawlabel = this.subject.substr(startpos, n);
+
+ // if we got this far, we've parsed a label.
+ // Try to parse an explicit link: [label](url "title")
+ if (this.peek() == C_OPEN_PAREN) {
+ this.pos++;
+ if (this.spnl() &&
+ ((dest = this.parseLinkDestination()) !== null) &&
+ this.spnl() &&
+ // make sure there's a space before the title:
+ (/^\s/.test(this.subject.charAt(this.pos - 1)) &&
+ (title = this.parseLinkTitle() || '') || true) &&
+ this.spnl() &&
+ this.match(/^\)/)) {
+ inlines.push({ t: 'Link',
+ destination: dest,
+ title: title,
+ label: parseRawLabel(rawlabel) });
+ return true;
+ } else {
+ this.pos = startpos;
+ return false;
+ }
+ }
+ // If we're here, it wasn't an explicit link. Try to parse a reference link.
+ // first, see if there's another label
+ var savepos = this.pos;
+ this.spnl();
+ var beforelabel = this.pos;
+ n = this.parseLinkLabel();
+ if (n == 2) {
+ // empty second label
+ reflabel = rawlabel;
+ } else if (n > 0) {
+ reflabel = this.subject.slice(beforelabel, beforelabel + n);
+ } else {
+ this.pos = savepos;
+ reflabel = rawlabel;
+ }
+ // lookup rawlabel in refmap
+ var link = this.refmap[normalizeReference(reflabel)];
+ if (link) {
+ inlines.push({t: 'Link',
+ destination: link.destination,
+ title: link.title,
+ label: parseRawLabel(rawlabel) });
+ return true;
+ } else {
+ this.pos = startpos;
+ return false;
+ }
+ // Nothing worked, rewind:
+ this.pos = startpos;
+ return false;
+};
+
+// Attempt to parse an entity, return Entity object if successful.
+var parseEntity = function(inlines) {
+ var m;
+ if ((m = this.match(reEntityHere))) {
+ inlines.push({ t: 'Str', c: entityToChar(m) });
+ return true;
+ } else {
+ return false;
+ }
+};
+
+// Parse a run of ordinary characters, or a single character with
+// a special meaning in markdown, as a plain string, adding to inlines.
+var parseString = function(inlines) {
+ var m;
+ if ((m = this.match(reMain))) {
+ inlines.push({ t: 'Str', c: m });
+ return true;
+ } else {
+ return false;
+ }
+};
+
+// Parse a newline. If it was preceded by two spaces, return a hard
+// line break; otherwise a soft line break.
+var parseNewline = function(inlines) {
+ var m = this.match(/^ *\n/);
+ if (m) {
+ if (m.length > 2) {
+ inlines.push({ t: 'Hardbreak' });
+ } else if (m.length > 0) {
+ inlines.push({ t: 'Softbreak' });
+ }
+ return true;
+ }
+ return false;
+};
+
+// Attempt to parse an image. If the opening '!' is not followed
+// by a link, return a literal '!'.
+var parseImage = function(inlines) {
+ if (this.match(/^!/)) {
+ var link = this.parseLink(inlines);
+ if (link) {
+ inlines[inlines.length - 1].t = 'Image';
+ return true;
+ } else {
+ inlines.push({ t: 'Str', c: '!' });
+ return true;
+ }
+ } else {
+ return false;
+ }
+};
+
+// Attempt to parse a link reference, modifying refmap.
+var parseReference = function(s, refmap) {
+ this.subject = s;
+ this.pos = 0;
+ this.label_nest_level = 0;
+ var rawlabel;
+ var dest;
+ var title;
+ var matchChars;
+ var startpos = this.pos;
+ var match;
+
+ // label:
+ matchChars = this.parseLinkLabel();
+ if (matchChars === 0) {
+ return 0;
+ } else {
+ rawlabel = this.subject.substr(0, matchChars);
+ }
+
+ // colon:
+ if (this.peek() === C_COLON) {
+ this.pos++;
+ } else {
+ this.pos = startpos;
+ return 0;
+ }
+
+ // link url
+ this.spnl();
+
+ dest = this.parseLinkDestination();
+ if (dest === null || dest.length === 0) {
+ this.pos = startpos;
+ return 0;
+ }
+
+ var beforetitle = this.pos;
+ this.spnl();
+ title = this.parseLinkTitle();
+ if (title === null) {
+ title = '';
+ // rewind before spaces
+ this.pos = beforetitle;
+ }
+
+ // make sure we're at line end:
+ if (this.match(/^ *(?:\n|$)/) === null) {
+ this.pos = startpos;
+ return 0;
+ }
+
+ var normlabel = normalizeReference(rawlabel);
+
+ if (!refmap[normlabel]) {
+ refmap[normlabel] = { destination: dest, title: title };
+ }
+ return this.pos - startpos;
+};
+
+// Parse the next inline element in subject, advancing subject position.
+// If memoize is set, memoize the result.
+// On success, add the result to the inlines list, and return true.
+// On failure, return false.
+var parseInline = function(inlines, memoize) {
+ var startpos = this.pos;
+ var origlen = inlines.length;
+ var memoized = memoize && this.memo[startpos];
+ if (memoized) {
+ this.pos = memoized.endpos;
+ Array.prototype.push.apply(inlines, memoized.inline);
+ return true;
+ }
+
+ var c = this.peek();
+ if (c === -1) {
+ return false;
+ }
+ var res;
+ switch(c) {
+ case C_NEWLINE:
+ case C_SPACE:
+ res = this.parseNewline(inlines);
+ break;
+ case C_BACKSLASH:
+ res = this.parseBackslash(inlines);
+ break;
+ case C_BACKTICK:
+ res = this.parseBackticks(inlines);
+ break;
+ case C_ASTERISK:
+ case C_UNDERSCORE:
+ res = this.parseEmphasis(c, inlines);
+ break;
+ case C_OPEN_BRACKET:
+ res = this.parseLink(inlines);
+ break;
+ case C_BANG:
+ res = this.parseImage(inlines);
+ break;
+ case C_LESSTHAN:
+ res = this.parseAutolink(inlines) || this.parseHtmlTag(inlines);
+ break;
+ case C_AMPERSAND:
+ res = this.parseEntity(inlines);
+ break;
+ default:
+ res = this.parseString(inlines);
+ break;
+ }
+ if (!res) {
+ this.pos += 1;
+ inlines.push({t: 'Str', c: fromCodePoint(c)});
+ }
+
+ if (memoize) {
+ this.memo[startpos] = { inline: inlines.slice(origlen),
+ endpos: this.pos };
+ }
+ return true;
+};
+
+// Parse s as a list of inlines, using refmap to resolve references.
+var parseInlines = function(s, refmap) {
+ this.subject = s;
+ this.pos = 0;
+ this.refmap = refmap || {};
+ this.memo = {};
+ this.last_emphasis_closer = { '*': s.length, '_': s.length };
+ var inlines = [];
+ while (this.parseInline(inlines, false)) {
+ }
+ return inlines;
+};
+
+// The InlineParser object.
+function InlineParser(){
+ return {
+ subject: '',
+ label_nest_level: 0, // used by parseLinkLabel method
+ last_emphasis_closer: null, // used by parseEmphasis method
+ pos: 0,
+ refmap: {},
+ memo: {},
+ match: match,
+ peek: peek,
+ spnl: spnl,
+ parseBackticks: parseBackticks,
+ parseBackslash: parseBackslash,
+ parseAutolink: parseAutolink,
+ parseHtmlTag: parseHtmlTag,
+ scanDelims: scanDelims,
+ parseEmphasis: parseEmphasis,
+ parseLinkTitle: parseLinkTitle,
+ parseLinkDestination: parseLinkDestination,
+ parseLinkLabel: parseLinkLabel,
+ parseLink: parseLink,
+ parseEntity: parseEntity,
+ parseString: parseString,
+ parseNewline: parseNewline,
+ parseImage: parseImage,
+ parseReference: parseReference,
+ parseInline: parseInline,
+ parse: parseInlines
+ };
+}
+
+module.exports.unescapeEntBS = unescapeEntBS;
+module.exports.InlineParser = InlineParser;