Editor half way through

cethttp/static/markdown.js

@@ -0,0 +1,78 @@
+/*! Licensed under MIT, https://github.com/sofish/pen */
+(function(root) {
+
+  // only works with Pen
+  if(!root.Pen) return;
+
+  // markdown covertor obj
+  var covertor = {
+    keymap: { '96': '`', '62': '>', '49': '1', '46': '.', '45': '-', '42': '*', '35': '#'},
+    stack : []
+  };
+
+  // return valid markdown syntax
+  covertor.valid = function(str) {
+    var len = str.length;
+
+    if(str.match(/[#]{1,6}/)) {
+      return ['h' + len, len];
+    } else if(str === '```') {
+      return ['pre', len];
+    } else if(str === '>') {
+      return ['blockquote', len];
+    } else if(str === '1.') {
+      return ['insertorderedlist', len];
+    } else if(str === '-' || str === '*') {
+      return ['insertunorderedlist', len];
+    } else if(str.match(/(?:\.|\*|\-){3,}/)) {
+      return ['inserthorizontalrule', len];
+    }
+  };
+
+  // parse command
+  covertor.parse = function(e) {
+    var code = e.keyCode || e.which;
+
+    // when `space` is pressed
+    if (code === 32) {
+      var markdownSyntax = this.stack.join('');
+      // reset stack
+      this.stack = [];
+
+      var cmd = this.valid(markdownSyntax);
+      if (cmd) {
+        // prevents leading space after executing command
+        e.preventDefault();
+        return cmd;
+      }
+    }
+
+    // make cmd
+    if(this.keymap[code]) this.stack.push(this.keymap[code]);
+
+    return false;
+  };
+
+  // exec command
+  covertor.action = function(pen, cmd) {
+
+    // only apply effect at line start
+    if(pen.selection.focusOffset > cmd[1]) return;
+
+    var node = pen.selection.focusNode;
+    node.textContent = node.textContent.slice(cmd[1]);
+    pen.execCommand(cmd[0]);
+  };
+
+  // init covertor
+  covertor.init = function(pen) {
+    pen.on('keypress', function(e) {
+      var cmd = covertor.parse(e);
+      if(cmd) return covertor.action(pen, cmd);
+    });
+  };
+
+  // append to Pen
+  root.Pen.prototype.markdown = covertor;
+
+}(window));