31797 - fallback handling for conversion when copy to clipboard

Status: VERIFIED FIXED

(Core :: XUL, defect, P3)

Description

[nhottanscp]

When copy text to clipboard, the data is converted from unicode to system 
charset. There are cases that some characters cannot be mapped to the system 
charset. Currently, the conversion is aborted after the unmapped character. But 
we can change the behavior to put '?' for the unmapped character and proceed the 
conversion.

In nsPrimitiveHelpers :: ConvertUnicodeToPlatformPlainText,
We can use 
SetOutputErrorBehavior(nsIUnicodeEncoder::kOnError_Replace, nsnull, '?');

Comment 1

[nhottanscp]

fix checked in

Comment 2

[Katsuhiko Momoi]

** Checked with 6/5/2000 Win32 build **

An excellent fix! Comparing pre-fix build with a post-fix
build on Japanese Windows, you see a dramatic difference. 
Now I can see the complete string with some "?"'s even
where my system, Japanese Windows does not have native support
for these Latin or other characters.

ji -- can you try copy pasting some Latin1 characters under
      JPN locale on Linux and seeif you get the whole data?
marina -- please help by trying copy/paste on Charales'
          JPN Mac.

Re-open if you find otherwise on these platforms.
Until proven ohterwise, I'm going to mark this fix verified.