// 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().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);
});
})();