diff options
Diffstat (limited to 'js/lib/xml.js')
| -rw-r--r-- | js/lib/xml.js | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/js/lib/xml.js b/js/lib/xml.js new file mode 100644 index 0000000..7168ffa --- /dev/null +++ b/js/lib/xml.js @@ -0,0 +1,275 @@ +"use strict"; + +// Helper function to produce an XML tag. +var tag = function(name, attrs, selfclosing) { + var result = '<' + name; + if (attrs && attrs.length > 0) { + var i = 0; + var attrib; + while ((attrib = attrs[i]) !== undefined) { + result = result.concat(' ', attrib[0], '="', attrib[1], '"'); + i++; + } + } + if (selfclosing) { + result += ' /'; + } + + result += '>'; + return result; +}; + +var reXMLTag = /\<[^>]*\>/; + +var renderNodes = function(block) { + + var attrs; + var info_words; + var tagname; + var walker = block.walker(); + var event, node, entering; + var buffer = ""; + var lastOut = "\n"; + var disableTags = 0; + var indentLevel = 0; + var indent = ' '; + var grandparent; + var out = function(s) { + if (disableTags > 0) { + buffer += s.replace(reXMLTag, ''); + } else { + buffer += s; + } + lastOut = s; + }; + var esc = this.escape; + var cr = function() { + if (lastOut !== '\n') { + buffer += '\n'; + lastOut = '\n'; + for (var i = indentLevel; i--;) { + buffer += indent; + } + } + }; + + var options = this.options; + + if (options.time) { console.time("rendering"); } + + while ((event = walker.next())) { + entering = event.entering; + node = event.node; + + attrs = []; + if (options.sourcepos) { + var pos = node.sourcepos; + if (pos) { + attrs.push(['data-sourcepos', String(pos[0][0]) + ':' + + String(pos[0][1]) + '-' + String(pos[1][0]) + ':' + + String(pos[1][1])]); + } + } + + switch (node.t) { + case 'Text': + out(esc(node.literal)); + break; + + case 'Softbreak': + out(this.softbreak); + break; + + case 'Hardbreak': + out(tag('br', [], true)); + cr(); + break; + + case 'Emph': + out(tag(entering ? 'em' : '/em')); + break; + + case 'Strong': + out(tag(entering ? 'strong' : '/strong')); + break; + + case 'XML': + out(node.literal); + break; + + case 'Link': + if (entering) { + attrs.push(['href', esc(node.destination, true)]); + if (node.title) { + attrs.push(['title', esc(node.title, true)]); + } + out(tag('a', attrs)); + } else { + out(tag('/a')); + } + break; + + case 'Image': + if (entering) { + if (disableTags === 0) { + out('<img src="' + esc(node.destination, true) + + '" alt="'); + } + disableTags += 1; + } else { + disableTags -= 1; + if (disableTags === 0) { + if (node.title) { + out('" title="' + esc(node.title, true)); + } + out('" />'); + } + } + break; + + case 'Code': + out(tag('code') + esc(node.literal) + tag('/code')); + break; + + case 'Document': + if (!entering) { + cr(); + } + break; + + case 'Paragraph': + grandparent = node.parent.parent; + if (grandparent !== null && + grandparent.t === 'List') { + if (grandparent.list_data.tight) { + break; + } + } + if (entering) { + cr(); + out(tag('p', attrs)); + } else { + out(tag('/p')); + } + break; + + case 'BlockQuote': + if (entering) { + cr(); + out(tag('blockquote', attrs)); + indentLevel += 1; + } else { + indentLevel -= 1; + cr(); + out(tag('/blockquote')); + } + break; + + case 'ListItem': + if (entering) { + cr(); + out(tag('li', attrs)); + } else { + out(tag('/li')); + } + break; + + case 'List': + tagname = node.list_data.type === 'Bullet' ? 'ul' : 'ol'; + if (entering) { + if (node.list_data.start && node.list_data.start > 1) { + attrs.push(['start', node.list_data.start.toString()]); + } + cr(); + out(tag(tagname, attrs)); + } else { + cr(); + out(tag('/' + tagname)); + } + break; + + case 'Header': + tagname = 'h' + node.level; + if (entering) { + cr(); + out(tag(tagname, attrs)); + } else { + out(tag('/' + tagname)); + } + break; + + case 'CodeBlock': + info_words = node.info ? node.info.split(/ +/) : []; + if (info_words.length > 0 && info_words[0].length > 0) { + attrs.push(['class', 'language-' + esc(info_words[0], true)]); + } + cr(); + out(tag('pre') + tag('code', attrs)); + out(esc(node.literal)); + out(tag('/code') + tag('/pre')); + break; + + case 'XMLBlock': + cr(); + out(node.literal); + break; + + case 'HorizontalRule': + cr(); + out(tag('hr', attrs, true)); + break; + + + case 'ReferenceDef': + break; + + default: + throw("Unknown node type " + node.t); + } + + } + if (options.time) { console.timeEnd("rendering"); } + return buffer; +}; + +var replaceUnsafeChar = function(s) { + switch (s) { + case '&': + return '&'; + case '<': + return '<'; + case '>': + return '>'; + case '"': + return '"'; + default: + return s; + } +}; + +var reNeedsEscaping = /[&<>"]/; + +// The XMLRenderer object. +function XMLRenderer(options){ + return { + // default options: + softbreak: '\n', // by default, soft breaks are rendered as newlines in HTML + // set to "<br />" to make them hard breaks + // set to " " if you want to ignore line wrapping in source + escape: function(s, preserve_entities) { + if (reNeedsEscaping.test(s)) { + if (preserve_entities) { + return s.replace(/[&](?:[#](x[a-f0-9]{1,8}|[0-9]{1,8});|[a-z][a-z0-9]{1,31};)|[&<>"]/gi, replaceUnsafeChar); + } else { + return s.replace(/[&<>"]/g, replaceUnsafeChar); + } + } else { + return s; + } + }, + options: options || {}, + render: renderNodes + }; +} + +module.exports = XMLRenderer; |