--- /dev/null
+(function() {
+ "use strict";
+
+ CodeMirror.defineOption("matchTags", false, function(cm, val, old) {
+ if (old && old != CodeMirror.Init) {
+ cm.off("cursorActivity", doMatchTags);
+ cm.off("viewportChange", maybeUpdateMatch);
+ clear(cm);
+ }
+ if (val) {
+ cm.on("cursorActivity", doMatchTags);
+ cm.on("viewportChange", maybeUpdateMatch);
+ doMatchTags(cm);
+ }
+ });
+
+ function clear(cm) {
+ if (cm.state.matchedTag) {
+ cm.state.matchedTag.clear();
+ cm.state.matchedTag = null;
+ }
+ }
+
+ function doMatchTags(cm) {
+ cm.state.failedTagMatch = false;
+ cm.operation(function() {
+ clear(cm);
+ var cur = cm.getCursor(), range = cm.getViewport();
+ range.from = Math.min(range.from, cur.line); range.to = Math.max(cur.line + 1, range.to);
+ var match = CodeMirror.findMatchingTag(cm, cur, range);
+ if (!match) return;
+ var other = match.at == "close" ? match.open : match.close;
+ if (other)
+ cm.state.matchedTag = cm.markText(other.from, other.to, {className: "CodeMirror-matchingtag"});
+ else
+ cm.state.failedTagMatch = true;
+ });
+ }
+
+ function maybeUpdateMatch(cm) {
+ if (cm.state.failedTagMatch) doMatchTags(cm);
+ }
+
+ CodeMirror.commands.toMatchingTag = function(cm) {
+ var found = CodeMirror.findMatchingTag(cm, cm.getCursor());
+ if (found) {
+ var other = found.at == "close" ? found.open : found.close;
+ if (other) cm.setSelection(other.to, other.from);
+ }
+ };
+})();