Bug 10492: Translation problems with TT directives in po files

Bug 10492: Translation problems with TT directives in po files

This patch implements the replacement of TTvariables
'[%...%]' with normal placeholders '%s' for text
inside HTML tags (eg. img, meta, input)

The replacement is done in two files:
* xgettext.pl, used on create/update, so TTvars are not
found on the text to translate (msgid)
* tmpl_proccess3.pl, used on install time, so the correct
translation is found (msgstr) and the right TTvar is put on
the translated text.

To test:
Before applying the patch
1) Update your favorite language
   cd misc/traslator
   perl translate update xx-YY

2) Build a list (ini.txt) of 'msgid' to do a comparison
   msgcat --no-wrap --use-first po/xx-YY-*po -o - | egrep "^msgid" | sort > ini.txt

3) Apply the patch

4) Update your favorite language, again
   cd misc/traslator
   perl translate update xx-YY

5) Build a final list (end.txt) of 'msgid' to do a comparison
   msgcat --no-wrap --use-first po/xx-YY-*po -o - | egrep "^msgid" | sort > end.txt

6) Compare both files, you must find (most) TTvars replaced by '%s'
   diff ini.txt end.txt

   for example:
   < msgid "Translate item type [% itemtype.itemtype | html %]"
   > msgid "Translate item type %s"

   < msgid "Holds on this item: [% item_loo.item_holds | html %] / Total holds on this record: [% item_loo.holds | html -%]"
   > msgid "Holds on this item: %s / Total holds on this record: %s"

   < msgid "tag_anchor_[% innerloo.tag | html %]_[% innerloo.index | html %][% innerloo.random | html %]"
   > msgid "tag_anchor_%s_%s%s"

   < msgid "[% innerloo.tag_lib | html %] - Click to Expand this Tag"
   > msgid "%s - Click to Expand this Tag"

7) Translate one of the examples, with more than one variable if
possible, for example this text in xx-YY-staff-prog.po
   > msgid "Holds on this item: %s / Total holds on this record: %s"
Check it's not marked as 'fuzzy'

8) Apply the translation
   perl translate install xx-YY

9) Check the translated string has all variables in the right order
   edit koha-tmpl/intranet-tmpl/prog/es-ES/modules/tools/batchMod-edit.tt
   around line '187', first '[% item_loo.item_holds | html %]', then
   '[% item_loo.holds | html -%]' on this case,
   or use another example

If approved this patch can be backported to current stable
versions.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 0f5d14f70792d5406857a81c415bc3f58cbd8b96)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>