feat: Arabic/Farsi/Urdu bidi reordering and contextual shaping — PR 1/3 (#2541)

Co-authored-by: Uri Tauber <uritaube@gmail.com>
2026-07-13 16:02:21 +03:00
parent 552b2683e6
commit 932a472835
18 changed files with 1087 additions and 62 deletions
@@ -11,9 +11,13 @@
 #include "parsers/ChapterHtmlSlimParser.h"

 namespace {
+// v28: text decoration bits now include line-through in serialized wordStyles.
 // v29: TextBlock word data stored as one flat arena (offset table + NUL-terminated
 // text blob) instead of length-prefixed strings and per-field arrays.
-constexpr uint8_t SECTION_FILE_VERSION = 29;
+// v30: Arabic shaping changed both drawing and measurement (getTextAdvanceX now
+//      measures the shaped visual text); cached word positions from v29 no longer
+//      match what drawText renders.
+constexpr uint8_t SECTION_FILE_VERSION = 30;
 // Written into the version field while a build is in progress; patched to
 // SECTION_FILE_VERSION only when the build is finalized. An abandoned /
 // crash-interrupted .bin therefore carries version 0, which loadSectionFile rejects