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0014673Open CASCADE[OCCT] OCCT:Foundation Classespublic2007-01-29 14:272019-07-10 22:29
[OCCT] 7.5.0* 
0014673: Provide true support for Unicode symbols
This improvement is inspired by OCC14672: as it turns, regardless of the fact
that OCCT provides class TCollection_ExtendedString and uses it in many places
(e.g. OCAF), de-facto the possibility to store Unicode (or any other non-ascii)
symbols by means of that class is almost never used (at least, not in OCC).

That is obviously bad: if we provide a class capable of storing Unicode
strings, and use it in many places, the possibility to have non-ascii symbols
in it should be supported.

For moving in that direction, the following steps are proposed:

1. Provide methods to convert Unicode string in the form of
TCollection_ExtendedString to other encodings; at least most widespread Ascii-
based encodings like HTML and UTF-8 are necessary

2. Provide method to dump ExtendedString (interpreted as Unicode one) to DRAW
Tcl interpreter (which has complete support for encodings and uses internally

3. Revise the code of OCCT where ExtendedString is converted to Ascii one (they
can be found either by revising modifications made in OCC14672 or directly by
searching OCCT code for "'?'" symbol used in safe conversions, or by
Is(An)Ascii() method), for a goal to provide more adequate conversion.

a) At least, the output to DRAW can use directly Unicode encoding.

b) Another good candidate for such improvement is XML persistence (LDOM* and
other dependent packages) -- see also OCC983 and OCC5032

c) As it seems, the visualisation already contains some code handling Unicode,
though in many cases (e.g. when computing size of text) it converts it to Ascii

d) Package Resource can also be considered. Note that it already contains some
code for converting Unicode strings to and from some far-eastern encodings
(EUC, GB and ShiftJIS) -- see Resource_Unicode class
No tags attached.
parent of 0022484closed bugmaster Open CASCADE UNICODE characters support. 
parent of 0022125closed bugmaster Open CASCADE TCollection_ExtendedString: conversion from UTF-8 to unicode 
Not all the children of this issue are yet resolved or closed.
cxx OSD_Path.cxx (41,193) 2011-04-01 12:50
Issue History
2011-08-02 11:23bugmasterCategoryOCCT:FDC => OCCT:Foundation Classes
2011-12-05 10:42abvFixed in VersionEMPTY =>
2011-12-05 10:42abvTarget Version => 6.5.3
2011-12-05 10:42abvDescription Updatedbug_revision_view_page.php?rev_id=1208#r1208
2011-12-05 10:43abvRelationship addedparent of 0022484
2011-12-05 10:45abvRelationship addedparent of 0022125
2012-01-12 15:16ysnNote Edited: 0012403
2012-01-12 17:27ysnNote Revision Dropped: 12403: 0002210
2012-01-12 17:28ysnNote Edited: 0012403bug_revision_view_page.php?rev_id=2239
2012-01-12 17:29ysnProjectOpen CASCADE => Internal
2012-03-12 07:45abvTarget Version6.5.3 => 6.5.4
2012-10-20 08:02abvRelationship addedparent of 0023479
2012-10-20 08:06abvNote Added: 0021865
2012-10-20 08:06abvStatusnew => feedback
2012-10-20 08:11abvTarget Version6.5.4 => Unscheduled
2012-10-26 10:55bugmasterNote Deleted: 0012404
2012-10-26 10:55bugmasterNote Deleted: 0021865
2012-10-26 10:56bugmasterProjectInternal => Open CASCADE
2012-10-30 09:19aivNote Deleted: 0012403
2012-10-30 09:29abvAssigned Tobugmaster => abv
2012-10-30 09:29abvStatusfeedback => assigned
2014-10-01 10:04abvTarget VersionUnscheduled => 7.1.0
2016-06-09 20:48Vico LiangNote Added: 0054868
2016-11-09 11:17abvTarget Version7.1.0 => 7.2.0
2017-07-27 09:43abvTarget Version7.2.0 => 7.4.0
2019-07-10 22:29abvTarget Version7.4.0 => 7.5.0*

Vico Liang   
2016-06-09 20:48   
There is a post "Better support XML Unicode storage in OCAF" [^]