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authorJohn MacFarlane <jgm@berkeley.edu>2015-01-11 13:43:03 -0800
committerJohn MacFarlane <jgm@berkeley.edu>2015-01-11 13:43:03 -0800
commitee812d1df1b237133dfaf490d6ff31f70dc73438 (patch)
tree854dd5828cd390430c8a59a70b6084a02c9e9c37 /js/lib
parentd012cefdee6235e107372dd939498a0ca107d7e0 (diff)
Start on xml.js.
Just the skeleton, mostly copied from HTML renderer. Can be simplified because of the regularity of the XML format. See #280.
Diffstat (limited to 'js/lib')
-rwxr-xr-xjs/lib/index.js1
-rw-r--r--js/lib/xml.js275
2 files changed, 276 insertions, 0 deletions
diff --git a/js/lib/index.js b/js/lib/index.js
index 22a2184..b309311 100755
--- a/js/lib/index.js
+++ b/js/lib/index.js
@@ -16,6 +16,7 @@ var util = require('util');
module.exports.Node = require('./node');
module.exports.DocParser = require('./blocks');
module.exports.HtmlRenderer = require('./html');
+module.exports.XMLRenderer = require('./xml');
module.exports.ASTRenderer = function(options) {
return {
render: function(tree) {
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 '&amp;';
+ case '<':
+ return '&lt;';
+ case '>':
+ return '&gt;';
+ case '"':
+ return '&quot;';
+ 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;