Fix CSS id for string prefixed with a digit

When encoding a string as a CSS identifier, we must add an underscore if
the strings starts with a digit.

NEWS

@@ -16,6 +16,7 @@ Bug fixes
  - fixed returned date format for email messages in Active Sync
  - fixed missing 'name part' in address for email messages in Active Sync
  - fixed race condition when syncing huge amount of deleted messages over Active Sync
+ - fixed encoding of string as CSS identifier when the string starts with a digit
 
 2.2.0 (2014-02-24)
 ------------------

SoObjects/Mailer/SOGoMailAccounts.m

@@ -78,20 +78,23 @@
 {
   id obj;
   NSArray *accounts;
+  NSString *key;
   SOGoUser *user;
   int keyCount;
+
+  key = [_key fromCSSIdentifier];
   
   /* first check attributes directly bound to the application */
-  obj = [super lookupName:_key inContext:_ctx acquire:NO];
+  obj = [super lookupName:key inContext:_ctx acquire:NO];
   if (!obj)
     {
       user = [SOGoUser userWithLogin: [self ownerInContext: nil]];
       accounts = [user mailAccounts];
 
-      keyCount = [_key intValue];
-      if ([_key isEqualToString: [NSString stringWithFormat: @"%d", keyCount]]
+      keyCount = [key intValue];
+      if ([key isEqualToString: [NSString stringWithFormat: @"%d", keyCount]]
           && keyCount > -1 && keyCount < [accounts count])
-        obj = [SOGoMailAccount objectWithName: _key inContainer: self];
+        obj = [SOGoMailAccount objectWithName: key inContainer: self];
       else
         obj = [NSException exceptionWithHTTPStatus: 404 /* Not Found */];
     }

SoObjects/SOGo/NSString+Utilities.m

@@ -332,8 +332,7 @@ static NSCharacterSet *controlCharSet = nil;
                                         (cssEscapingCount + 1)
                                         * sizeof (unichar));
   for (count = 0; count < cssEscapingCount; count++)
-    *(cssEscapingCharacters + count)
-      = [[characters objectAtIndex: count] characterAtIndex: 0];
+    *(cssEscapingCharacters + count) = [[characters objectAtIndex: count] characterAtIndex: 0];
   *(cssEscapingCharacters + cssEscapingCount) = 0;
 }
 
@@ -360,14 +359,20 @@ static NSCharacterSet *controlCharSet = nil;
 
   cssIdentifier = [NSMutableString string];
   max = [self length];
-  for (count = 0; count < max; count++)
+  if (max > 0)
     {
-      currentChar = [self characterAtIndex: count];
-      idx = [self _cssCharacterIndex: currentChar];
-      if (idx > -1)
-        [cssIdentifier appendString: cssEscapingStrings[idx]];
-      else
-        [cssIdentifier appendFormat: @"%C", currentChar];
+      if (isdigit([self characterAtIndex: 0]))
+        // A CSS identifier can't start with a digit; we add an underscore
+        [cssIdentifier appendString: @"_"];
+      for (count = 0; count < max; count++)
+        {
+          currentChar = [self characterAtIndex: count];
+          idx = [self _cssCharacterIndex: currentChar];
+          if (idx > -1)
+            [cssIdentifier appendString: cssEscapingStrings[idx]];
+          else
+            [cssIdentifier appendFormat: @"%C", currentChar];
+        }
     }
 
   return cssIdentifier;
@@ -397,7 +402,17 @@ static NSCharacterSet *controlCharSet = nil;
 
   newString = [NSMutableString string];
   max = [self length];
-  for (count = 0; count < max - 2; count++)
+  count = 0;
+  if (max > 0
+      && [self characterAtIndex: 0] == '_'
+      && isdigit([self characterAtIndex: 1]))
+    {
+      /* If the identifier starts with an underscore followed by a digit,
+         we remove the underscore */
+      count = 1;
+    }
+
+  for (; count < max - 2; count++)
     {
       currentChar = [self characterAtIndex: count];
       if (currentChar == '_')

UI/WebServerResources/JavascriptAPIExtensions.js

@@ -106,6 +106,10 @@ String.prototype.asCSSIdentifier = function() {
         newString = newString.replace(re, escapeds[i]);
     }
 
+    if (/^\d+/.test(newString)) {
+        newString = '_' + newString;
+    }
+
     return newString;
 };