keys: javascript mode match reorder, comments

Code cleanup, optimisation.

diff --git a/keys.js b/keys.js
index b625db79b17a08e533f517a01ad8b2c0e310711b..993e8f458cc76ae300971d4c9532a2beb2f6d7af 100644 (file)
--- a/keys.js
+++ b/keys.js
@@ -23,19 +23,27 @@ document.onkeypress = function(e) {
                keys[keylabels[i].innerHTML] = keylabels[i].parentNode;
        }
        var input = e.charCode || e.keyCode;
+
+       // find key element matching input
        for (var i = 0; i < keylabels.length; i++) {
                var key = keylabels[i].parentNode;
-               if (!key.onclick) continue;
+               if (!key.onclick) continue; // link
                var keychar = key.className.match(/ chr(\d+)$/);
-               if (!keychar) continue; // not enterable
+               if (!keychar) continue; // has code
                keychar = keychar[1];
-               if (keychar != input) continue; // different key
+               if (keychar != input) continue; // matches code
+
+               // match mode (visibility)
                var row = key.parentNode;
+               var shown = row.style.display != 'none';
+               if (!shown) continue;
+
+               // match key modifiers
                var keymod = row.className;
-               if ((keymod.search(/\bctrl\b/) != -1) != e.ctrlKey) continue; // modifier mismatch
+               if ((keymod.search(/\bctrl\b/) != -1) != e.ctrlKey) continue;
                if ((keymod.search(/\bmeta\b/) != -1) != e.altKey) continue;
-               var shown = row.style.display != 'none';
-               if (!shown) continue; // foreign mode
+
+               // select
                if (keyfocus) keyfocus.style.outline = '';
                key.style.outline = '1px solid red';
                keyfocus = key;