md/libs/scripts/codemirror/format.js

(function() {
 
    CodeMirror.extendMode("css", {
      commentStart: "/*",
      commentEnd: "*/",
      newlineAfterToken: function(type, content) {
        return /^[;{}]$/.test(content);
      }
    });

    // Comment/uncomment the specified range
    CodeMirror.defineExtension("commentRange", function (isComment, from, to) {
      var cm = this, curMode = CodeMirror.innerMode(cm.getMode(), cm.getTokenAt(from).state).mode;
      cm.operation(function() {
        if (isComment) { // Comment range
          cm.replaceRange(curMode.commentEnd, to);
          cm.replaceRange(curMode.commentStart, from);
          if (from.line == to.line && from.ch == to.ch) // An empty comment inserted - put cursor inside
            cm.setCursor(from.line, from.ch + curMode.commentStart.length);
        } else { // Uncomment range
          var selText = cm.getRange(from, to);
          var startIndex = selText.indexOf(curMode.commentStart);
          var endIndex = selText.lastIndexOf(curMode.commentEnd);
          if (startIndex > -1 && endIndex > -1 && endIndex > startIndex) {
            // Take string till comment start
            selText = selText.substr(0, startIndex)
            // From comment start till comment end
              + selText.substring(startIndex + curMode.commentStart.length, endIndex)
            // From comment end till string end
              + selText.substr(endIndex + curMode.commentEnd.length);
          }
          cm.replaceRange(selText, from, to);
        }
      });
    });
   
    // Applies automatic mode-aware indentation to the specified range
    CodeMirror.defineExtension("autoIndentRange", function (from, to) {
      var cmInstance = this;
      this.operation(function () {
        for (var i = from.line; i <= to.line; i++) {
          cmInstance.indentLine(i, "smart");
        }
      });
    });
   
    // Applies automatic formatting to the specified range
    CodeMirror.defineExtension("autoFormatRange", function (from, to) {
      var cm = this;
      var outer = cm.getMode(), text = cm.getRange(from, to).split("\n");
      var state = CodeMirror.copyState(outer, cm.getTokenAt(from).state);
      var tabSize = cm.getOption("tabSize");
   
      var out = "", lines = 0, atSol = from.ch == 0;
      function newline() {
        out += "\n";
        atSol = true;
        ++lines;
      }
   
      for (var i = 0; i < text.length; ++i) {
        var stream = new CodeMirror.StringStream(text[i], tabSize);
        while (!stream.eol()) {
          var inner = CodeMirror.innerMode(outer, state);
          var style = outer.token(stream, state), cur = stream.current();
          stream.start = stream.pos;
          if (!atSol || /\S/.test(cur)) {
            out += cur;
            atSol = false;
          }
          if (!atSol && inner.mode.newlineAfterToken &&
              inner.mode.newlineAfterToken(style, cur, stream.string.slice(stream.pos) || text[i+1] || "", inner.state))
            newline();
        }
        if (!stream.pos && outer.blankLine) outer.blankLine(state);
        if (!atSol) newline();
      }
   
      cm.operation(function () {
        cm.replaceRange(out, from, to);
        for (var cur = from.line + 1, end = from.line + lines; cur <= end; ++cur)
          cm.indentLine(cur, "smart");
        cm.setSelection(from, cm.getCursor(false));
      });
    });
  })();