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Diffstat (limited to 'lib/markdown-writer.js')
| -rw-r--r-- | lib/markdown-writer.js | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/lib/markdown-writer.js b/lib/markdown-writer.js deleted file mode 100644 index b63d104..0000000 --- a/lib/markdown-writer.js +++ /dev/null @@ -1,176 +0,0 @@ - -var _ = require("underscore"); - -function mdElement(start, end) { - if (end === undefined) - end = start; - - this.open = function(attrs) { - return start; - }; - - this.close = function() { - return end; - }; - - this.empty = function(attrs) { - return this.open(attrs) + this.close(); - }; -} -function mdLink(link, text) { - var attrs = {}; - - this.open = function(attributes) { - attrs = attributes || {}; - - return "["; - }; - - this.close = function() { - return (attrs[text] || "") + "](" + (attrs[link] || "") + ")"; - }; - - this.empty = function(attrs) { - // don't display empty content (this is mainly to remove images with no src data) - var content = this.open(attrs) + this.close(); - - if(content === "[]()") { - return ""; - } - - return content; - }; -} -function mdList() { - this.open = function(attrs) { - return attrs.indent > -1 ? "\n" : ""; - }; - - this.close = function(attrs) { - return attrs.indent > -1 ? "" : "\n"; - }; - - this.empty = function(attrs) { - return this.open(attrs) + this.close(); - }; -} -function mdListItem() { - this.open = function(attrs) { - var output = ""; - - for(var i = 0; i < attrs.indent; ++i) { - output += "\t"; - } - - return output + (attrs.type === "ul" ? "-" : attrs.count + ".") + " "; - }; - - this.close = function() { - return "\n"; - }; - - this.empty = function(attrs) { - return this.open(attrs) + this.close(); - }; -} - -// map HTML tags to Markdown syntax -var htmlmd = { - // paragraphs elements use three line feeds to close - // this prevents them being caught by collapsing list elements in `asString` - // while still allowing them to be collapsed when multiple empty lines are removed - "h1": new mdElement("# ", "\n\n\n"), - "h2": new mdElement("## ", "\n\n\n"), - "h3": new mdElement("### ", "\n\n\n"), - "h4": new mdElement("#### ", "\n\n\n"), - "h5": new mdElement("##### ", "\n\n\n"), - "h6": new mdElement("###### ", "\n\n\n"), - "p": new mdElement("", "\n\n\n"), - "br": new mdElement("", " \n"), - "ul": new mdList(), - "ol": new mdList(), - "li": new mdListItem(), - "strong": new mdElement("**"), - "em": new mdElement("*"), - "a": new mdLink("href"), - "img": new mdLink("src", "alt"), -}; - -function mdWriter() { - var fragments = []; - var listStack = []; - var list = { - indent: -1, - type: "ul", - count: 0 - }; - - function isList(tagName) { - return tagName === "ul" || tagName === "ol"; - } - - function open(tagName, attributes) { - if(htmlmd[tagName]) { - attributes = attributes || {}; - - if(tagName === "li") { - attributes.indent = list.indent; - attributes.type = list.type; - attributes.count = ++list.count; - } - else if(isList(tagName)) { - attributes.indent = list.indent; - } - - fragments.push(htmlmd[tagName].open(attributes)); - - if(isList(tagName)) { - listStack.push(_.clone(list)); - - list.type = tagName; - list.indent++; - list.count = 0; - } - } - } - - function close(tagName) { - if(htmlmd[tagName]) { - if(isList(tagName)) { - list = listStack.pop(); - } - - fragments.push(htmlmd[tagName].close(list)); - } - } - - function selfClosing(tagName, attributes) { - if(htmlmd[tagName]) { - fragments.push(htmlmd[tagName].empty(attributes)); - } - } - - function text(value) { - fragments.push(value); - } - - function append(html) { - fragments.push(html); - } - - function asString() { - // massage the output to collapse mulitple empty lines and empty lines between nested lists - return fragments.join("").replace(/\n{2}(\t*)([2-9]\d*\.|- )/g, "\n$1$2").replace(/\n{3,}/g, "\n\n"); - } - - return { - asString: asString, - open: open, - close: close, - text: text, - selfClosing: selfClosing, - append: append - }; -} - -exports.writer = mdWriter;
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