accesskey tooltip rewriting

Does client-side rewriting of accesskey tooltip text so that it will be
more OS and browser specific. Dokuwiki should output all accesskey tooltips
as [ALT+<key>] because this patch matches on "[ALT+".

darcs-hash:20060428015158-05dcb-0102a1b2068c053e81dd21ad3927c78b6c9f349e.gz

inc/html.php

@@ -248,7 +248,7 @@ function html_btn($name,$id,$akey,$params,$method='get'){
 
   $ret .= '<input type="submit" value="'.htmlspecialchars($label).'" class="button" ';
   if($akey){
-    $ret .= 'title="ALT+'.strtoupper($akey).'" ';
+    $ret .= 'title="[ALT+'.strtoupper($akey).']" ';
     $ret .= 'accesskey="'.$akey.'" ';
   }
   $ret .= '/>';

lib/exe/js.php

@@ -121,7 +121,8 @@ function js_out(){
     // load user script
     @readfile(DOKU_CONF.'userscript.js');
 
-    // add scroll event
+    // add scroll event and tooltip rewriting
+    js_runonstart('updateAccessKeyTooltip()');
     js_runonstart('scrollToMarker()');
 
     // initialize init pseudo event

lib/scripts/script.js

@@ -16,6 +16,33 @@ if (clientPC.indexOf('opera')!=-1) {
     var is_opera_seven = (window.opera && document.childNodes);
 }
 
+/**
+ * Rewrite the accesskey tooltips to be more browser and OS specific.
+ *
+ * Accesskey tooltips are still only a best-guess of what will work
+ * on well known systems.
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function updateAccessKeyTooltip() {
+  // determin tooltip text (order matters)
+  var tip = 'ALT+'; //default
+  if (domLib_isMac) { tip = 'CTRL+'; }
+  if (domLib_isOpera) { tip = 'SHIFT+ESC '; }
+  // add other cases here...
+
+  // do tooltip update
+  if (tip=='ALT+') { return; }
+  var exp = /\[ALT\+/i;
+  var rep = '['+tip;
+  var elements = domLib_getElementsByTagNames(['a', 'input', 'button']);
+  for (var i=0; i<elements.length; i++) {
+    if (elements[i].accessKey.length==1 && elements[i].title.length>0) {
+      elements[i].title = elements[i].title.replace(exp, rep);
+    }
+  }
+}
+
 /**
  * Handy shortcut to document.getElementById
  *