571072 - Cannot get some Unicode characters from a plug-in

Status: RESOLVED INCOMPLETE

(Core Graveyard :: Plug-ins, defect)

Description

[Vlad Alexander]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a5pre) Gecko/20100607 Minefield/3.7a5pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a5pre) Gecko/20100607 Minefield/3.7a5pre

We are having a problem getting some Unicode characters from our plug-in. This could be a bug. Here is our code:

// get keyboard layout
void *kl = NULL;
KeyboardLayoutRef keylo = NULL;
KLGetCurrentKeyboardLayout( &keylo );
if( KLGetKeyboardLayoutProperty( keylo, kKLuchrData,(const void **)&kl) != noErr )
	kl = NULL;
if( kl )
	UCKeyTranslate( (const UCKeyboardLayout *)kl,((keyCodeMask&ev->message)>>8) & 0xff,kUCKeyActionDown,(ev->modifiers>>8) & 0xff,LMGetKbdType(),kUCKeyTranslateNoDeadKeysMask,&dk,10,&cb, unic );
else
{//cannot get unicode key layout, then try KCHR layout
	KLGetKeyboardLayoutProperty( keylo,kKLKCHRData,(const void **)&kl); 
	if( kl )
	{
		cb = 0;
		unic[0] = KeyTranslate( kl, ( ((keyCodeMask&ev->message)>>8) | (ev->modifiers & 0xff00)), &cb );
		if( cb )
		{
			cb = 0;
			unic[0] = KeyTranslate( kl, ( 0x80 | ((keyCodeMask&ev->message)>>8) | (ev->modifiers & 0xff00)), &cb );
		}
	}
}

Using a Czech keyboard layout, using the modifier keys, we are able to capture some characters. For example, pressing ' followed by "a" works. But pressing ' followed by "s" does not. Pressing " followed by "2" we are getting 2 characters instead of one.

Here is a screen shot of how we do the keyboard input:
http://misc.xstandard.com/mozilla/keyboard.gif

Here is our plug-in:
http://misc.xstandard.com/mozilla/XStandard.plugin.zip

Here is a test page to load the plug-in:
http://xstandard.com/pro.asp

Reproducible: Always

Steps to Reproduce:
1. Install our plug-in from here:
http://misc.xstandard.com/mozilla/XStandard.plugin.zip

2. Load it in a test page:
http://xstandard.com/pro.asp

3. Change the keyboard layout to Czech and open the Keyboard viewer.

4. Press the ' key followed by "s".
Actual Results:  
Letter "s" is received.

Expected Results:  
Letter "ś".

Comment 1

[Benjamin Smedberg]

Resolving old bugs which are likely not relevant any more, since NPAPI plugins are deprecated.