pike.git/lib/modules/Parser.pmod/Markdown.pmod:2901e7a60c44827d78be3c66c282fc2b67f87238

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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 #charset utf-8 #pike __REAL_VERSION__ #require constant(Regexp.PCRE.Widestring) //! This is a port of the Javascript Markdown parser 'Marked' //! @url{https://github.com/chjj/marked@}. The only method needed to //! be used is @[parse()] which will transform Markdown text to HTML. //! //! For a description on Markdown, go to the web page of the inventor of //! Markdown @url{https://daringfireball.net/projects/markdown/@}. import Regexp.PCRE; #define nl() (options->newline ? "\n" : "") // Cache for compiled regexps private mapping(string:object) __re_cache = ([]); // Returns the precompiled regexp PATTERN from cache if it's previously used. // Otherwise it compiles, caches and returns it. #define REGX(PATTERN, ARGS...) \ (__re_cache[PATTERN + #ARGS] || \ (__re_cache[PATTERN + #ARGS] = R(PATTERN, ARGS))) // Shortened regexp options protected constant RM = OPTION.MULTILINE; protected constant RI = OPTION.CASELESS; //! Convert markdown @[md] to html //! //! @param options //! @mapping //! @member bool "gfm" //! Enable Github Flavoured Markdown. (true) //! @member bool "tables" //! Enable GFM tables. Requires "gfm" (true) //! @member bool "breaks" //! Enable GFM "breaks". Requires "gfm" (false) //! @member bool "pedantic" //! Conform to obscure parts of markdown.pl as much as possible. //! Don't fix any of the original markdown bugs or poor behavior. (false) //! @member bool "sanitize" //! Sanitize the output. Ignore any HTML that has been input. (false) //! @member bool "mangle" //! Mangle (obfuscate) autolinked email addresses (true) //! @member bool "smart_lists" //! Use smarter list behavior than the original markdown. (true) //! @member bool "smartypants" //! Use "smart" typographic punctuation for things like quotes and //! dashes. (false) //! @member string "header_prefix" //! Add prefix to ID attributes of header tags (empty) //! @member bool "xhtml" //! Generate self closing XHTML tags (false) //! @member bool "newline" //! Add a newline after tags. If false the output will be //! on one line (well, newlines in text will be kept). (false) //! @member Renderer "renderer" //! Use this renderer to render output. (Renderer) //! @member Lexer "lexer" //! Use this lexer to parse blocks of text. (Lexer) //! @member InlineLexer "inline_lexer" //! Use this lexer to parse inline text. (InlineLexer) //! @member Parser "parser" //! Use this parser instead of the default. (Parser) //! @endmapping string parse(string md, void|mapping options) { options = default_options + (options||([])); if (!options->lexer) options->lexer = Lexer; if (!options->parser) options->parser = Parser; return options->parser(options)->parse(options->lexer(options)->lex(md)); } protected typedef mapping(string:R|mapping(string:R)) RuleMap; protected object noop = class { string source; array|zero split2() { return 0; } protected string _sprintf(int t) { return "noop()"; } }(); protected function make_regexp(R|string regex, void|int opts) { regex = (string)regex; function(string,string,void|bool:function|R) fun, fun2; R rep = REGX("(^|[^[])\\^"); // In most generated regexps we only want to replace the first occurance // of `name` (and that's how replace in Javascript works by default). But // in Pike replace() will replace all occurances of `name` by default. We // work around that below, but in a few instances we want the global // replace() so we state that explicitly. fun = lambda (string name, R|string val, void|bool all) { if (!name || !sizeof(name)) { return R(regex, opts); } val = rep->replace((string)val, lambda (string a, string b) { return b; }); if (all) { regex = replace(regex, name, val); } else { regex = replace1(regex, name, val); } return fun; }; fun2 = fun; return fun; } //! Replaces the first occurance of @[from] in @[subject] to @[to] protected string replace1(string subject, string from, string to) { int p1 = search(subject, from); if (p1 > -1) { int p2 = search(subject, from, p1+1); if (p2 > -1) { subject = replace(subject[0..p2-1], from, to) + subject[p2..]; } else { subject = replace(subject, from, to); } } return subject; } //! HTML encode @tt{<>"'@}. If @[enc] is @tt{true@} @tt{&@} will also be encoded protected string encode_html(string html, void|bool enc) { return replace(REGX((!enc ? "&(?!\\#?\\w+;)" : "&"))->replace(html, "&"), ([ "<" : "<", ">" : ">", "\"" : """, "'" : "'" ])); } protected string decode_html(string html) { return REGX("&([\\#\\w]+);")->replace(html, lambda (string a, string b) { b = lower_case(b); if (b == "colon") return ":"; if (b[0] == '#') { return b[1] == 'x' ? sprintf("%x", (int)b[2..]) : sprintf("%c", (int)b[1..]); } return ""; }); } protected constant default_options = ([ "gfm" : true, "tables" : true, "breaks" : false, "pedantic" : false, "sanitize" : false, "sanitizer" : UNDEFINED, "mangle" : true, "smart_lists" : true, "silent" : false, "highlight" : UNDEFINED, "lang_prefix" : "lang-", "smartypants" : false, "header_prefix" : "", "renderer" : UNDEFINED, "xhtml" : false, "newline" : true ]); protected class R { inherit Widestring : ws; protected string src; protected void create(R|string re, void|int options) { src = (string)re; ws::create(src, options); } string `source() { return src; } array(string)|zero split_string(string subject) { array(array(int)) offsets = ({}); ws::matchall(subject, lambda (array a, array b) { offsets += ({ b }); }); if (!sizeof(offsets)) { return 0; } offsets += ({ 0 }); array(string) ret = ({ }); array(int) c; int start, stop; for (int i; i < sizeof(offsets); i++) { c = offsets[i]; stop = c && c[0] || sizeof(subject); ret += ({ subject[start .. stop] }); if (!c) break; start = c[1]; } return ret; } array(string) split_all(string subject) { array(string) ret = ({}); ws::matchall(subject, lambda (array a, array b) { ret += ({ a[0] }); }); return ret; } protected string _sprintf(int t) { switch (t) { case 's': return source; case 'O': return "object(" + source + ")"; default: error("Unhandled sprintf_format (%%%c)! ", t); break; } } protected string cast(string how) { return src; } } private RuleMap block_rules; RuleMap get_block_rules() { if (block_rules) return block_rules; RuleMap block = ([ "newline" : R("^\\n+"), "code" : R("^( {4}[^\\n]+\\n*)+"), "hr" : R("^( *[-*_]){3,} *(?:\\n+|$)"), "heading" : R("^ *(\\#{1,6}) *([^\\n]+?) *\\#* *(?:\\n+|$)"), "lheading" : R("^([^\\n]+)\\n *(=|-){2,} *(?:\\n+|$)"), "blockquote" : R("^( *>[^\\n]+(\\n(?!def)[^\\n]+)*\\n*)+"), "list" : R("^( *)(bull) [\\s\\S]+?(?:hr|def|\\n{2,}(?! )(?!\\1bull )\\n*|\\s*$)"), "html" : R("^ *(?:comment *(?:\\n|\\s*$)|closed *(?:\\n{2,}|\\s*$)|closing *(?:\\n{2,}|\\s*$))"), "def" : R("^ *\\[([^\\]]+)\\]: *<?([^\\s>]+)>?(?: +[\"(]([^\\n]+)[\")])? *(?:\\n+|$)"), "paragraph" : R("^((?:[^\\n]+\\n?(?!hr|heading|lheading|blockquote|tag|def))+)\\n*"), "text" : R("^[^\\n]+"), "table" : noop, "fences" : noop, "nptable" : noop, ]); block->bullet = R("(?:[*+-]|\\d+\\.)"); block->item = make_regexp("^( *)(bull) [^\\n]*(?:\\n(?!\\1bull )[^\\n]*)*", RM) ("bull", block->bullet, true) (); block->list = make_regexp(block->list) ("bull", block->bullet, true) ("hr", "\\n+(?=\\1?(?:[-*_] *){3,}(?:\\n+|$))") ("def", "\\n+(?=" + block->def->source + ")") (); block->blockquote = make_regexp(block->blockquote) ("def", block->def) (); block->_tag = R("(?!(?:" "a|em|strong|small|s|cite|q|dfn|abbr|data|time|code" "|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo" "|span|br|wbr|ins|del|img)\\b)\\w+(?!:/|[^\\w\\s@]*@)\\b"); block->html = make_regexp(block->html) ("comment", "") ("closed", "<(tag)[\\s\\S]+?</\\1>") ("closing", "<tag(?:\"[^\"]*\"|'[^']*'|[^'\">])*?>") ("tag", block->_tag, true) (); block->paragraph = make_regexp(block->paragraph) ("hr", block->hr) ("lheading", block->lheading) ("heading", block->heading) ("blockquote", block->blockquote) ("tag", "<" + (string)block->_tag, true) ("def", block->def) (); block->normal = copy_value(block); block->gfm = block->normal + ([ "fences" : R("^ *(`{3,}|~{3,})[ \\.]*(\\S+)? *\\n([\\s\\S]*?)\\s*\\1 *(?:\\n+|$)"), "paragraph" : R("^"), "heading" : R("^ *(\\#{1,6}) +([^\\n]+?) *\\#* *(?:\\n+|$)") ]); block->gfm->paragraph = make_regexp(block->paragraph) ("(?!", "(?!" + replace1(block->gfm->fences->source, "\\1", "\\2") + "|" + replace1(block->list->source, "\\1", "\\3") + "|") (); block->tables = block->gfm + ([ "nptable" : R("^ *(\\S.*\\|.*)\\n *([-:]+ *\\|[-| :]*)\\n((?:.*\\|.*(?:\\n|$))*)\\n*"), "table" : R("^ *\\|(.+)\\n *\\|( *[-:]+[-| :]*)\\n((?: *\\|.*(?:\\n|$))*)\\n*") ]); return block_rules = block; } private RuleMap inline_rules; RuleMap get_inline_rules() { if (inline_rules) return inline_rules; RuleMap inl = ([ "escape" : R("^\\\$[\\\\`*{}\\[\\]()\\#+\\-.!_>])"), "autolink" : R("^<([^ >]+(@|:/)[^ >]+)>"), "tag" : R("^|^</?\\w+(?:\"[^\"]*\"|'[^']*'|[^'\">])*?>"), "link" : R("^!?\\[(inside)\\]\\(href\$"), "reflink" : R("^!?\\[(inside)\\]\\s*\\[([^\\]]*)\\]"), "nolink" : R("^!?\\[((?:\\[[^\\]]*\\]|[^\\[\\]])*)\\]"), "strong" : R("^__([\\s\\S]+?)__(?!_)|^\\*\\*([\\s\\S]+?)\\*\\*(?!\\*)"), "em" : R("^\\b_((?:[^_]|__)+?)_\\b|^\\*((?:\\*\\*|[\\s\\S])+?)\\*(?!\\*)"), "code" : R("^(`+)\\s*([\\s\\S]*?[^`])\\s*\\1(?!`)"), "br" : R("^ {2,}\\n(?!\\s*$)"), "text" : R("^[\\s\\S]+?(?=[\\\\<!\\[_*`]| {2,}\\n|$)"), "del" : noop, "url" : noop ]); inl->_inside = R("(?:\\[[^\\]]*\\]|[^\\[\\]]|\\](?=[^\\[]*\\]))*"); inl->_href = R("\\s*<?([\\s\\S]*?)>?(?:\\s+['\"]([\\s\\S]*?)['\"])?\\s*"); inl->link = make_regexp(inl->link) ("inside", inl->_inside) ("href", inl->_href) (); inl->reflink = make_regexp(inl->reflink) ("inside", inl->_inside) (); inl->normal = copy_value(inl); inl->gfm = inl->normal + ([ "escape" : make_regexp(inl->escape)("])", "~|])")(), "url" : R("^(https?://[^\\s<]+[^<.,:;\"')\\]\\s])"), "del" : R("^~~(?=\\S)([\\s\\S]*?\\S)~~"), "text" : make_regexp(inl->text) ("]|", "~]|") ("|", "|https?://|") () ]); inl->breaks = inl->gfm + ([ "br" : make_regexp(inl->br)("{2,}", "*")(), "text" : make_regexp(inl->gfm->text)("{2,}", "*")() ]); return inline_rules = inl; } //! Top-level parsing handler. It's usually easier to replace the Renderer //! instead. class Parser { protected mapping options; protected array tokens = ({}); protected mapping token; protected Renderer renderer; protected InlineLexer inline_lexer; protected void create(void|mapping opts) { options = opts || default_options; if (!options->renderer) options->renderer = Renderer; if (!options->inline_lexer) options->inline_lexer = InlineLexer; renderer = options->renderer = options->renderer(options); } private int pos = -1; #define next() (token = tokens[++pos]) #define peek() tokens[pos + 1] //! string parse(Lexer src) { token = UNDEFINED; inline_lexer = options->inline_lexer(src->links, options); tokens = src->tokens; tokens += ({ 0 }); // sentinel String.Buffer out = String.Buffer(); function add = out->add; while (next()) { add(tok()); } return out->get(); } //! protected string parse_text() { string body = token->text; while (peek()->type == "text") { body += (options->newline ? "\n" : " ") + (next()->text||""); } return inline_lexer->output(body); } //! Render a token (or group of tokens) to a string. protected string tok() { switch (token->type) { case "space": return ""; case "hr": return renderer->hr(); case "heading": return renderer->heading(inline_lexer->output(token->text), token->depth, token->text, token); case "code": return renderer->code(token->text, token->lang, token->escaped, token); case "table": string header = "", body = "", cell = ""; array(string) row; for (int i; i < sizeof(token->header); i++) { cell += renderer->tablecell( inline_lexer->output(token->header[i]), ([ "header" : true, "align" : token->align[i] ]), ([]), ); } header += renderer->tablerow(cell, ([])); for (int i; i < sizeof(token->cells); i++) { row = token->cells[i]; cell = ""; for (int j; j < sizeof(row); j++) { cell += renderer->tablecell( inline_lexer->output(row[j]), ([ "header" : false, "align" : token->align[j] ]), ([]), ); } body += renderer->tablerow(cell, ([])); } return renderer->table(header, body, token); case "blockquote_start": body = ""; while (next()->type != "blockquote_end") { body += tok(); } return renderer->blockquote(body, token); case "list_start": bool ordered = token->ordered; body = ""; while (next()->type != "list_end") { body += tok(); } return renderer->list(body, ordered, token); case "list_item_start": body = ""; while (next()->type != "list_item_end") { body += token->type == "text" ? parse_text() : tok(); } return renderer->listitem(body, token); case "loose_item_start": body = ""; while (next()->type != "list_item_end") { body += tok(); } return renderer->listitem(body, token); case "html": string html = !token->pre && !options->pedantic ? inline_lexer->output(token->text) : token->text; return renderer->html(html, token) + nl(); case "paragraph": return renderer->paragraph(inline_lexer->output(token->text), token); case "text": return renderer->paragraph(parse_text(), token); default: error("Unhandled token: %O\n", token); break; } } } #define SRC_SUBSTR() src = src[sizeof(cap[0]) .. ] #define PUSH_TOKEN(T) _tokens += ({ T }) //! Block-level lexer (parses paragraphs, lists, tables, etc). class Lexer { protected array(mapping) _tokens = ({}); protected mapping token_links = ([]); protected mapping options; protected RuleMap rules, block; //! mapping `links() { return token_links; } array(mapping) `tokens() { return _tokens; } protected void create(void|mapping opts) { options = opts || default_options; block = get_block_rules(); rules = block->normal; if (options->gfm) { if (options->tables) { rules = get_block_rules()->tables; } else { rules = get_block_rules()->gfm; } } } //! Main lexing entry point. Subclass Lexer and override this to add //! post-processing or other changes. object_program lex(string src) { src = replace(src, ([ "\r\n" : "\n", "\r" : "\n", "\t" : " ", "\u00a0" : " ", "\u2424" : "\n" ])); tokenize(src, true); return this; } protected array tokenize(string src, bool|int(0..1) top, void|bool bq) { src = REGX("^ +$", RM)->replace(src, ""); array(string) cap; bool next; // NB: Some versions of PCRE do not support having the end marker ($) // in character classes. Add a terminating "\n" end sentinel if // there isn't already one there. // Note that this will not affect the output with newer versions // of PCRE as a single ending "\n" is ignored. // // Once affected version is PCRE 5.0 as distributed by Redhat FC4. if (sizeof(src) && !has_suffix(src, "\n")) { src += "\n"; } while (src && sizeof(src)) { // Newline, (assignment) if (cap = rules->newline->split2(src)) { SRC_SUBSTR(); if (sizeof(cap[0]) > 1) { PUSH_TOKEN(([ "type" : "space" ])); } } // Code if (cap = rules->code->split2(src)) { SRC_SUBSTR(); string tmp = REGX("^ {4}", RM)->replace(cap[0], ""); PUSH_TOKEN(([ "type" : "code", "text" : !options->pedantic ? REGX("\n+$")->replace(tmp, "") : tmp ])); continue; } // fences (gfm) if (cap = rules->fences->split2(src)) { SRC_SUBSTR(); PUSH_TOKEN(([ "type": "code", "lang": cap[2], "text": has_index(cap, 3) && cap[3] || "" ])); continue; } // heading if (cap = rules->heading->split2(src)) { SRC_SUBSTR(); PUSH_TOKEN(([ "type" : "heading", "depth" : sizeof(cap[1]), "text" : cap[2] ])); continue; } // table no leading pipe (gfm) if (top && (cap = rules->nptable->split2(src))) { SRC_SUBSTR(); mapping item = ([ "type" : "table", "header" : REGX(" *\\| *")->split_string(REGX("^ *| *\\| *$") ->replace(cap[1], "")), "align" : REGX(" *\\| *")->split_string(REGX("^ *|\\| *$") ->replace(cap[2], "")), "cells" : REGX("\\n$")->replace(cap[3], "") / "\n" ]); for (int i; i < sizeof(item->align); i++) { if (REGX("^ *-+: *$")->match(item->align[i])) { item->align[i] = "right"; } else if (REGX("^ *:-+: *$")->match(item->align[i])) { item->align[i] = "center"; } else if (REGX("^ *:-+ *$")->match(item->align[i])) { item->align[i] = "left"; } else { item->align[i] = UNDEFINED; } } for (int i; i < sizeof(item->cells); i++) { item->cells[i] = REGX(" *\\| *")->split_string(item->cells[i]); } PUSH_TOKEN(item); continue; } // lheading if (cap = rules->lheading->split2(src)) { SRC_SUBSTR(); PUSH_TOKEN(([ "type" : "heading", "depth" : cap[2] == "=" ? 1 : 2, "text" : cap[1] ])); continue; } // hr if (cap = rules->hr->split2(src)) { SRC_SUBSTR(); PUSH_TOKEN(([ "type": "hr" ])); continue; } // blockquote if (cap = rules->blockquote->split2(src)) { SRC_SUBSTR(); PUSH_TOKEN(([ "type": "blockquote_start" ])); string tmp = REGX("^ *> ?", RM)->replace(cap[0], ""); // Pass `top` to keep the current // "toplevel" state. This is exactly // how markdown.pl works. tokenize(tmp, top, true); PUSH_TOKEN(([ "type": "blockquote_end" ])); continue; } // list if (cap = rules->list->split2(src)) { string bull = cap[2]; SRC_SUBSTR(); PUSH_TOKEN(([ "type" : "list_start", "ordered" : sizeof(bull) > 1 ])); // Get each top-level item. cap = rules->item->split_all(cap[0]); //cap[0].match(rules->item); next = false; int l = sizeof(cap); int i = 0; for (; i < l; i++) { string item = cap[i]; // Remove the list item's bullet // so it is seen as the next token. int space = sizeof(item); item = REGX("^ *([*+-]|\\d+\\.) +")->replace(item, ""); // Outdent whatever the // list item contains. Hacky. if (search(item, "\n ") > -1) { space -= sizeof(item); item = !options->pedantic ? REGX("^ {1," + space + "}", RM)->replace(item, "") : REGX("^ {1,4}", RM)->replace(item, ""); } // Determine whether the next list item belongs here. // Backpedal if it does not belong in this list. if (options->smart_lists && i != l - 1) { string b = block->bullet->split2(cap[i+1])[0]; if (bull != b && !(sizeof(bull) > 1 && sizeof(b) > 1)) { src = (cap[i+1..] * "\n") + src; i = l - 1; } } // Determine whether item is loose or not. // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/ // for discount behavior. bool loose = next || REGX("\\n\\n(?!\\s*$)")->match(item); if (i != l - 1) { next = item[-1] == '\n'; if (!loose) loose = next; } PUSH_TOKEN(([ "type" : loose ? "loose_item_start" : "list_item_start" ])); // Recurse. tokenize(item, false, bq); PUSH_TOKEN(([ "type" : "list_item_end" ])); } PUSH_TOKEN(([ "type" : "list_end" ])); continue; } // html if (cap = rules->html->split2(src)) { SRC_SUBSTR(); PUSH_TOKEN(([ "type" : options->sanitize ? "paragraph" : "html", "pre" : !options->sanitizer && (cap[1] == "pre" || cap[1] == "script" || cap[1] == "style"), "text" : cap[0] ])); continue; } // def if ((!bq && top) && (cap = rules->def->split2(src))) { SRC_SUBSTR(); token_links[lower_case(cap[1])] = ([ "href": cap[2], "title": cap[3] ]); continue; } // table (gfm) if (top && (cap = rules->table->split2(src))) { SRC_SUBSTR(); mapping item = ([ "type" : "table", "header" : REGX(" *\\| *")->split_string(REGX("^ *| *\\| *$") ->replace(cap[1], "")), "align" : REGX(" *\\| *")->split_string(REGX("^ *|\\| *$") ->replace(cap[2], "")), "cells" : REGX("(?: *\\| *)?\\n$")->replace(cap[3], "") / "\n" ]); for (int i; i < sizeof(item->align); i++) { if (REGX("^ *-+: *$")->match(item->align[i])) { item->align[i] = "right"; } else if (REGX("^ *:-+: *$")->match(item->align[i])) { item->align[i] = "center"; } else if (REGX("^ *:-+ *$")->match(item->align[i])) { item->align[i] = "left"; } else { item->align[i] = UNDEFINED; } } for (int i; i < sizeof(item->cells); i++) { item->cells[i] = REGX(" *\\| *")->split_string( REGX("^ *\\| *| *\\| *$")->replace(item->cells[i], "")); } PUSH_TOKEN(item); continue; } // top-level paragraph if (top && (cap = rules->paragraph->split2(src))) { SRC_SUBSTR(); PUSH_TOKEN(([ "type" : "paragraph", "text" : (cap[1][-1] == '\n') ? cap[1][..<1] : cap[1] ])); continue; } // text if (cap = rules->text->split2(src)) { // Top-level should never reach here. SRC_SUBSTR(); PUSH_TOKEN(([ "type": "text", "text": cap[0] ])); continue; } if (sizeof(src)) { string tmp = src; if (sizeof(tmp) > 30) { tmp = tmp[..30] + "[...]"; } tmp = "[...]" + tmp; error("'Infinite loop%s! ", tmp); } } return _tokens; } } //! Lexer used for inline text (eg bold text inside a paragraph). class InlineLexer { protected mapping options, rules, links; protected Renderer renderer; protected void create(mapping lnks, void|mapping opts) { options = opts || default_options; links = lnks; rules = get_inline_rules()->normal; renderer = options->renderer || Renderer; if (!links) { error("Tokens array requires a `links` property! "); } if (options->gfm) { if (options->breaks) { rules = get_inline_rules()->breaks; } else { rules = get_inline_rules()->gfm; } } else if (options->pedantic) { rules = get_inline_rules()->pedantic; } } private bool in_link = false; //! Parse some inline Markdown and return the corresponding HTML. string output(string src) { String.Buffer buf = String.Buffer(); function add = buf->add; string link, href, text; array cap; while (src && sizeof(src)) { // escape if (cap = rules->escape->split2(src)) { SRC_SUBSTR(); add(cap[1]); continue; } // autolink if (cap = rules->autolink->split2(src)) { SRC_SUBSTR(); if (cap[2] == "@") { text = cap[1][6] == ':' ? mangle(cap[1][7..]) : mangle(cap[1]); href = mangle("mailto:") + text; } else { text = encode_html(cap[1]); href = text; } add(renderer->link(href, UNDEFINED, text, ([]))); continue; } // url (gfm) if (!in_link && (cap = rules->url->split2(src))) { SRC_SUBSTR(); text = encode_html(cap[1]); href = text; add(renderer->link(href, UNDEFINED, text, ([]))); continue; } // tag if (cap = rules->tag->split2(src)) { if (!in_link && REGX("^<a ", RI)->match(cap[0])) { in_link = true; } else if (in_link && REGX("^<\\/a>", RI)->match(cap[0])) { in_link = false; } SRC_SUBSTR(); add(options->sanitize ? options->sanitizer ? options->sanitizer(cap[0]) : encode_html(cap[0]) : cap[0]); continue; } // link if (cap = rules->link->split2(src)) { SRC_SUBSTR(); in_link = true; add(output_link(cap, ([ "href" : cap[2], "title" : cap[3] ]))); in_link = false; continue; } // reflink, nolink if ((cap = rules->reflink->split2(src)) || (cap = rules->nolink->split2(src))) { SRC_SUBSTR(); link = sizeof(cap) > 2 && cap[2] || REGX("\\s+")->replace(cap[1], " "); mapping lnk = links[lower_case(link)]; if (!lnk || !lnk->href) { add(cap[0][0..0]); src = cap[0][1..] + src; continue; } in_link = true; add(output_link(cap, lnk)); in_link = false; continue; } // strong if (cap = rules->strong->split2(src)) { SRC_SUBSTR(); add(renderer->strong(output(cap[2] || cap[1]), ([]))); continue; } // em if (cap = rules->em->split2(src)) { SRC_SUBSTR(); add(renderer->em(output(cap[2] || cap[1]), ([]))); continue; } // code if (cap = rules->code->split2(src)) { SRC_SUBSTR(); add(renderer->codespan(encode_html(cap[2], true), ([]))); continue; } // br if (cap = rules->br->split2(src)) { SRC_SUBSTR(); add(renderer->br(([]))); continue; } // del (gfm) if (cap = rules->del->split2(src)) { SRC_SUBSTR(); add(renderer->del(output(cap[1]), ([]))); continue; } // text if (cap = rules->text->split2(src)) { SRC_SUBSTR(); add(renderer->text(encode_html(smartypants(cap[0])), ([]))); continue; } if (sizeof(src)) error("Infinite loop! "); } return buf->get(); } protected string smartypants(string text) { if (!options->smartypants) return text; // em-dashes, en-dashes text = replace(text, ([ "---" : "—", "--" : "–" ])); // opening singles text = REGX("(^|[-—/(\\[{\"\\s])'")->replace(text, lambda (string a, string b) { return b + "‘"; }); // closing singles & apostrophes text = replace(text, "'", "’"); // opening doubles text = REGX("(^|[-—/(\\[{‘\\s])\"")->replace(text, lambda (string a, string b) { return b + "“"; }); // closing doubles text = replace(text, "\"", "”"); // ellipses text = REGX("\\.{3}")->replace(text, "…"); return text; } protected string output_link(array cap, mapping link) { string href = encode_html(link->href); string title = link->title ? encode_html(link->title) : UNDEFINED; return cap[0][0] != '!' ? renderer->link(href, title, output(cap[1]), ([])) : renderer->image(href, title, encode_html(cap[1]), ([])); } protected string mangle(string s) { if (!options->mangle) return s; string out = ""; int l = sizeof(s), i = 0; string ch; for (; i < l; i++) { ch = s[i..i]; if (random(1.0) > 0.5 || s[i] == '@') { ch = sprintf("&#x%x;", s[i]); } out += ch; } return out; } } //! class Renderer { //! Markdown renderer. Subclass this to customize the output of @[parse]. protected mapping options; protected void create(void|mapping opts) { options = opts; } //! Collect additional attributes from the token and render them as HTML //! attributes. Default attributes can be provided. string attrs(mapping token, mapping|void dflt) { mapping att = filter(dflt || ([]), stringp); foreach (token; string key; mixed val) { if (has_prefix(key, "attr_") && stringp(val)) { att[key[5..]] = val; } } return sprintf("%{ %s=%q%}", sort((array)att)); //TODO: Properly escape HTML } //! string code(string code, string lang, bool escaped, mapping token) { if (options->highlight) { string out = options->highlight(code, lang); if (out && out != code) { code = out; escaped = true; } } if (!lang) { return sprintf("<pre%s><code>%s%s</code></pre>%[1]s", attrs(token), !escaped ? encode_html(code, true) : code, nl()); } return sprintf( "<pre%s><code class='%s%s'>%s%s</code></pre>%[3]s", attrs(token), options->lang_prefix, encode_html(lang), !escaped ? encode_html(code, true) : code, nl() ); } //! string blockquote(string text, mapping token) { return sprintf("<blockquote%s>%s%s</blockquote>%[1]s", attrs(token), nl(), text); } //! string hr() { return options->xhtml ? "<hr/>" + nl() : "<hr>" + nl(); } //! string heading(string text, int level, string raw, mapping token) { string id = options->header_prefix + lower_case(REGX("[^\\w]+")->replace(raw, "-")); return "<h" + level + attrs(token, (["id": id])) + ">" + text + "</h" + level + ">" + nl(); } //! string list(string body, void|bool ordered, mapping token) { return sprintf("<%s%s>%s%s</%[0]s>%[2]s", ordered ? "ol" : "ul", attrs(token), nl(), body); } //! string listitem(string text, mapping token) { return sprintf("<li%s>%s</li>%s", attrs(token), text, nl()); } //! string paragraph(string text, mapping token) { return sprintf("<p%s>%s</p>%s", attrs(token), text, nl()); } //! string table(string header, string body, mapping token) { return sprintf( "<table%s>%s<thead>%[1]s%s</thead>%[1]s" "<tbody>%[1]s%s</tbody>%[1]s</table>%[1]s", attrs(token), nl(), header, body ); } //! string tablerow(string row, mapping token) { return sprintf("<tr%s>%s%s</tr>%[1]s", attrs(token), nl(), row); } //! string tablecell(string cell, mapping flags, mapping token) { mapping align = flags->align && (["style": "text-align:" + flags->align]); return sprintf( "<%s%s>%s</%[0]s>%s", flags->header ? "th" : "td", attrs(token, align), cell, nl() ); } //! string html(string text, mapping token) { return text; } string text(string t, mapping token) { return t; } string strong(string t, mapping token) { return sprintf("<strong%s>%s</strong>", attrs(token), t); } string em(string t, mapping token) { return sprintf("<em%s>%s</em>", attrs(token), t); } string del(string t, mapping token) { return sprintf("<del%s>%s</del>", attrs(token), t); } string codespan(string t, mapping token) { return sprintf("<code%s>%s</code>", attrs(token), t); } string br(mapping token) { return options->xhtml ? "<br/>" : "<br>"; } //! string link(string href, string|zero title, string text, mapping token) { if (options->sanitize) { mixed e = catch { string t = Protocols.HTTP.uri_decode(decode_html(href)); t = REGX("[^\\w:]")->replace(t, ""); if (has_prefix(t, "javascript:") || has_prefix(t, "vbscript:")) { return ""; } }; if (e) { return ""; } } return sprintf( "<a%s>%s</a>", attrs(token, (["href": href, "title": title])), text ); } //! string image(string url, string title, string text, mapping token) { string i = sprintf("<img src='%s' alt='%s'", url, text); if (text) i += sprintf(" title='%s'", text); return i + (options->xhtml ? "/>" : ">"); } }

pike.git/ lib/ modules/ Parser.pmod/ Markdown.pmod > 2901e7a60c44827d78be3c66c282fc2b67f87238 [Annotate]