Bug 209391 - cursoring behaviour with composed GSUB characters
cursoring behaviour with composed GSUB characters
Product: Fedora
Classification: Fedora
Component: icu (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Caolan McNamara
: i18n
Depends On:
Blocks: 209969
  Show dependency treegraph
Reported: 2006-10-04 21:19 EDT by Lawrence Lim
Modified: 2014-03-25 20:54 EDT (History)
3 users (show)

See Also:
Fixed In Version: 5.0.0
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-01-22 05:02:27 EST
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
test case for oriya locale (414.47 KB, application/octet-stream)
2006-10-04 21:21 EDT, Lawrence Lim
no flags Details

  None (edit)
Description Lawrence Lim 2006-10-04 21:19:15 EDT
Description of problem:
Noticed something interesting on the cursoring, it works ok for GPOS characters
but not GSUB characters like those found in the attached Test Cases.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.loaded the Test Case with firefox
2.copy and paste one of the char into oowriter (in my case TC #61)
3.press left arrow key (<-)
Actual results:
Cursor still on the right of the character

Expected results:
Should move to the left of the character

Additional info:
Interestingly, after Step 3, try Ctrl-V, the characters will get "mashed"
together. Similar behaviour was not observed in gedit.
Comment 1 Lawrence Lim 2006-10-04 21:21:38 EDT
Created attachment 137790 [details]
test case for oriya locale
Comment 3 Caolan McNamara 2006-10-05 03:52:06 EDT
The last time there was something like this it was a grapheme clustering table
issue, icu/writer is probably still considering the single "character" to be
comprised of separate bits which can be cursored into.
Comment 4 Caolan McNamara 2006-10-05 07:56:45 EDT
Well, this is tricky, but I've added code to icu 3.6-6 which seems to "do the
right thing" for oriya and malayam with respect to such pango-like cursoring
through "foo virama foo" constructs.

Some testing outside the specialized virama using tests of these examples for
normal oriya/malayam text would be "a good thing"(tm)
Comment 6 Caolan McNamara 2006-11-07 12:53:20 EST
*** Bug 213465 has been marked as a duplicate of this bug. ***
Comment 7 Caolan McNamara 2006-11-07 12:59:06 EST
Strange, I could have *sworn* there was more comments than this in this bug
along the line of "I'm confident it works, but it's not a very elegent solution,
albeit the same as that of pango" and that it was set to modified, and even
maybe verified, closed...

anyway for RHEL-5 we have 3.6-5.5, and all looks well for me there for test case
41 and for other foo virama foo constructs for cursoring through them

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