| Unicode is used to generate the unicode data in src/corelib/text/. |
| |
| To update: |
| * Find the data (UAX #44, UCD; not the XML version) at |
| ftp://www.unicode.org/Public/zipped/$Version/ |
| * Unpack the zip file; for each file in data/, replace with the new |
| version; find the *BreakProperty.txt in auxiliary/. (These last are |
| only in the zip, not in the web-space's unpacked versions.) |
| * In tst_QTextBoundaryFinder's data/ sub-directory, update its files |
| from the auxiliary/ sub-directory of the UCD data. |
| * If needed, add an entry to enum QChar::UnicodeVersion for the new |
| Unicode version |
| * In that case, also update main.cpp's initAgeMap and DATA_VERSION_S* |
| to match |
| * Build this project. Its binary, unicode, ignores command-line |
| options and assumes it is being run from this directory. When run, |
| it produces lots of output. If it gets as far as updating |
| qunicodetables.cpp the output hopefully doesn't matter. |
| * It'll end prematurely with a qFatal() message if it needs updates, |
| either in main.cpp or in QChar: |
| * "unassigned or unhandled age value:" initAgeMap() and |
| QChar::UnicodeVersion; |
| * "Unhandled script property value:" initScriptMap(), QChar::Script, |
| qharfbuzzng.cpp's _qtscript_to_hbscript[] array and |
| qfontconfigdatabase.cpp's specialLanguages. |
| * "unassigned word break class:" enum WordBreakClass, |
| word_break_class_string and initWordBreak(); |
| * Assertions or other qFatal()s may trigger: if so, study code and |
| understand what's more complicated about this update; talk to folk |
| named in the git logs, maybe push a WIP to gerrit to solicit |
| advice. Some bit-field may need to be expanded, for example. In some |
| cases QChar may need additions to some of its enums. |
| * Build with the modified code, fix any compilation issues, make check |
| in suitable directories, including tst_QTextBoundaryFinder. |
| * That may have updated qtbase/src/corelib/text/qunicodetables.cpp; if |
| so the update matters; be sure to commit the changes to data/ at the |
| same time and update text/qt_attribution.json to match; use the UCD |
| Revision number, rather than the Unicode standard number, as the |
| Version, for all that qunicodetables.cpp uses the latter (see the |
| 'UAX #44, UCD' page linked from https://www.unicode.org/ucd/ for the |
| table with this). |
| * If there are enum additions in qchar.h (public API), be sure to also |
| update the documentation in qchar.cpp for each affected enum, |
| respecting the existing ordering. |
| * If you don't normally build in the source tree, remember to delete |
| qtbase/.qmake.stash while you're cleaning up. |
| |
| The script writingSystems.sh generates a list of writing systems, |
| ostensibly as a the basis for updating QFontDatabase::WritingSystem |
| enum; however, the Release 20 output of it contains many more writing |
| systems than are present in that enum, suggesting it has not been run |
| in a very long time. Further research needed. |
