// Define match-highlighter commands. Depends on searchcursor.js

// Use by attaching the following function call to the onCursorActivity event:

	//myCodeMirror.matchHighlight(minChars);

// And including a special span.CodeMirror-matchhighlight css class (also optionally a separate one for .CodeMirror-focused -- see demo matchhighlighter.html)



(function() {

  var DEFAULT_MIN_CHARS = 2;

  

  function MatchHighlightState() {

	this.marked = [];

  }

  function getMatchHighlightState(cm) {

	return cm._matchHighlightState || (cm._matchHighlightState = new MatchHighlightState());

  }

  

  function clearMarks(cm) {

	var state = getMatchHighlightState(cm);

	for (var i = 0; i < state.marked.length; ++i)

		state.marked[i].clear();

	state.marked = [];

  }

  

  function markDocument(cm, className, minChars) {

    clearMarks(cm);

	minChars = (typeof minChars !== 'undefined' ? minChars : DEFAULT_MIN_CHARS);

	if (cm.somethingSelected() && cm.getSelection().replace(/^\s+|\s+$/g, "").length >= minChars) {

		var state = getMatchHighlightState(cm);

		var query = cm.getSelection();

		cm.operation(function() {

			if (cm.lineCount() < 2000) { // This is too expensive on big documents.

			  for (var cursor = cm.getSearchCursor(query); cursor.findNext();) {

				//Only apply matchhighlight to the matches other than the one actually selected

				if (!(cursor.from().line === cm.getCursor(true).line && cursor.from().ch === cm.getCursor(true).ch))

					state.marked.push(cm.markText(cursor.from(), cursor.to(), className));

			  }

			}

		  });

	}

  }



  CodeMirror.defineExtension("matchHighlight", function(className, minChars) {

    markDocument(this, className, minChars);

  });

})();

