Avoid flickering of composing text on Windows#1389
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This is a quick fix for the flickering issue of composing text on certain Windows apps such as Notepad (google#1386). Previously, we have called composition_range->SetText(write_cookie, 0, L"", 0); not only when the composing text becomes empty but also when the composing text is just updated to a non-empty string. This seems to cause flickering on certain Windows apps. Ideally the entire logic here should be audited and redesigned. It will be discussed in google#1388. Closes google#1386.
hiroyuki-komatsu
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Oct 22, 2025
2.32.5981 → 2.32.5994 Conversion * Do not remember punctuation-ending non-Japanese (ASCII) strings directly input by the composer. (5e09d3d) Feature * Stop providing "did you mean" description on language aware rewriter. (353859a) Bug fix * Windows: Fix text reconversions on Excel (#1385) * Windows: Avoid flickering of composing text on Windows (#1389) Code * Windows: Always let server/renderer run in Win32 Jobs (#1379) 2.31.5851 → 2.32.5981 Conversion * Updated the language model (11a5dc3) * Updated zip-code as of 2025-08-30 (53e6db7) * Removed the 62-day storage limit for input history. Retain the history up to the data size limit. (12f6d98) * Fix an overfiltering of candidates that have the same key and longer common prefix value. (1dfd91b) + e.g. 堺 (さかい) was overfilitered as 堺井(さかい) is also an candidate. * Updated some data entries (#1331, #1351, #1360, #1374) * Updated the candidate filtering rule (9d7332c) * Updated the logic of word suggestion for multiple segments (aka inner boundary) (22adec5) Bug fix * Fix an issue that the top candidate with multiple segments may get broken. (f3437a0) * Linux: Fix a crash issue on some Linux environment that does not support _SC_GETPW_R_SIZE_MAX (#1318) * macOS: Fix a crash issue of the installer on macOS 26 (Tahoe) (018d8d9) * Windows: Fix a UI issue that mouse clicking on the candidate window did not work. (#1372) + Regression on 2.31.5851 Packaging * Support specifying the version number as a Bazel command line option (4f48688) * e.g. Bazel build package --action_env=MOZC_VERSION="2.31.5810.0" * Android: made libmozc.so compatible with 16 KB page sizes (#1364) * macOS: supported .dmg file generation with codesign * macOS: updated the required version from macOS11 to macOS12 * Windows: Supported ARM64 build (#1130) * Windows: Removed unused PDB (#1261) * Windows: Support OS build number check (#1329) Build * Removed the build time dependency on Unicode's text files (#1353) * Updated Bazel: 8.1.1 → 8.4.1 * Updated Abseil: 20250127.1→ 20250814.0 * Updated Protobuf: v29.3 → v32.0 * Updated googletest: v1.15.2 → v1.17.0 * Updated Qt: 6.8.0 → 6.9.1 * GitHub Actions: updated macOS environment 14 → 15 * GitHub Actions: updated Windows environment 2022 → 2025 Code * Added lattice viewer (3c62c59) * Updated the coding style (i.e. "string &s" → "string& s"). * Performed a number of refactoring. PiperOrigin-RevId: 822376409
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Description
This is a quick fix for the flickering issue of composing text on certain Windows apps such as Notepad (#1386).
Previously, we have called
not only when the composing text becomes empty but also when the composing text is just updated to a non-empty string. This seems to cause flickering on certain Windows apps.
Ideally the entire logic here should be audited and redesigned. It will be discussed in #1388.
Closes #1386.
Issue IDs
Steps to test new behaviors (if any)