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Always use CustomAction to register COM DLLs - #1500
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This is a preparation to change the Mozc's installation directory from "Program Files (x86)" to "Program Files" not only for new installations but also for existing installations (google#1086). The ground truth is that TSF-based IMEs need to register their COM DLLs to the registry key "HKEY_CLASSES_ROOT\CLSID", and there are basically two ways to do it in the installer (MSI file): A. Use custom action in WiX, which calls Win32 registry APIs to manually manipulate the registry. B. Declare COM information in the pre-defined database of MSI file, and let MSI engine to register the COM DLLs. Mozc started with the method A, then switched to the method B [1], then switched back to methods A only for universal installer [2], and now is fully switching back to the method A for all the installers with this commit. The problem is that the method B is feasible only when the COM DLL file name and destination path are determined at the build time, and it is not the case for both universal installer and installation directory migration. Now that all the installers we build (x64 only, ARM64 only, and universal) hit such limitation, there is no reason to keep the method B code path. [1]: e467907 [2]: 96bab12
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Jun 24, 2026
3.33.6133 → 3.33.6239 Conversion: * Updated the OSS dictionary [975d7d6] * Updated Zip code data as of 2026-04-03 [3e72fb3] * Added the circled zero (⓪) to number conversion candidates (#1520) [b18e5de] * Updated words for font names (#1449) [335c3c9] * Removed trailing space after small final sigma symbol (#1450) [5154bd8] * Android: Improved the word prediction feature [40dc336, c692321, cb87ab5] * Android: Improted the user history prediction feature [7684d80, 3350a19, a8f29ae, c5dd76f] Features: * Added support for mathematical functions (sin, cos, etc.) in the calculator rewriter [27710f2] * Added text sanitizer against ill-formed UTF-8 and ASCII control characters [fa11e0a, 61bdcfc] * Windows: Supported DPI change in candidate/infolist window (#1481) [fafbde9] Bug fix: * Android: Fixed ClearHistory failing to delete candidates with leading spaces [a8f245e] * Emacs: Fixed candidate overlay collapse when tab-line is enabled (#1507) [0c8acf4] * Emacs: Fixed backward compatibility for candidate window display in mozc.el (#1427) [891e324] * macOS: Fixed a failure of application launch [34c3187] * macOS: Correctly set RGB values for footer border color [0b71173] Code: * Removed Singleton class usages (#1461, #1463, #1464, #1465, #1475, #1477, #1478, #1479, #1480, #1490, #1491, #1497, #1498, #1499, #1502, #1509, #1510, #1513, #1514, #1515, #1523) * Avoided unnecessary string-resizes by using absl::StringResizeAndOverwrite (#1524, #1525) [ff20a11, 6fce2f3] * Replaced const std::string& with absl::string_view across multiple modules [988fbca, a801e2f, edc7cd0, 99aa820, 8c82922, 7e648b2] * Refactored candidate view design and renderer styling using RendererStyle and renderer_style.textproto [751df90, be6dd36, 67cede2, afbf1d0] * Refactored FlatConcurrentCache memory footprint and insert API [c891133, 3a4130b] * Refactored UserPos cost mapping to generate kPosTypeStringTable dynamically from user_pos.def [53de4e4, 8c190e5, a20e4c1, 70fdb7f] * Decoupled ImmutableConverter and DictionaryInterface from ConversionRequest and extracted Options [2ee4da3, 6ba80c7, b30921c] * Refactored ConfigDialog UI layouts and frame mechanisms [4638ce6, c79a760, 895652c, 3c327d8] * Removed Lemon-based parser for CalculatorRewriter [cb95326, e96c1ba] * Removed Breakpad integration [1078e63] * Removed unused ServerLauncher::set_server_program (#1466) [a524a88] * Removed --timeout/--restricted from renderer (#1494) [be0eb82] * Removed an optional optimization for uniprocessor (#1501) [5381793] * Removed zstring_view [61068fe] * Fixed name shadowing in QtIpcServer constructor (#1486) [8cb8458] * Used unique service names in renderer_server_test (#1433) [858f8c0] * Made RendererStyleHandler platform-neutral (#1474) [e4cb300] * Applied standard code formatter to mac/ and unix/ directories [3024194] * Linux: Made the default Qt path relative to the workspace root [5d46097] * Linux: Removed generation of IBus engine XML and moved IBus config textproto to a dedicated file [2c84656, fb22406, dacc0a4] * macOS: Consolidated ios and macos selections into apple in mozc_select [96c86c0] * macOS: Made MacStatsConfigUtilImpl stateless (#1496) [5fc301c] * Windows: Simplified GetDPIScalingFactor for Windows (#1467) [04a1ed3] * Windows: Always used "en-US" in HResult::ToString() (#1476) [7c1f61c] * Windows: Fixed MSVC extension warnings in WinAPITestHelper (#1492) [8cb5cc3] * Windows: Defined NO_SHLWAPI_STRFCNS to not define StrCat (#1508) [fdfcc30] * Windows: Always evaluate ServerLauncher::server_program() (#1473) [45c33ae] Build: * Updated Bazel version to 9.0.2 [3ced4c8] * Removed git submodules [32be060, 48bbbf7, efaae55] * Moved src/data/version/mozc_version_template.bzl to src/version.bzl [68d04b2] * Made //engine:data_loader_test deterministic (#1522) [9afbd98] * Worked around QTBUG-145239 with a local patch (#1506) [9df9774] * Removed redundant build options from instructions (#1489) [180ef9f] * Android: Separated android_util into its own dedicated build target [060b96e] * Bazel: Made build rules compatible with Bazel 8.6 / 9.0 and updated external dependencies (#1451, #1453, #1454) [6c19ff0, 7cad196, 684c1d4, 979a650] * Windows: Allowed building Mozc with Visual Studio 2026 (#1495) [b940437] * Windows: Updated minimum Windows version to 1809 (build 17763) [3792d79] * Windows: Always used CustomAction to register COM DLLs (#1500) [82dca34] * Windows: Introduced mozc_win32_resource alias and universal MSI installer build support (#1434) [ecf3825, bab1403, 96bab12] * Windows: Used ARM64-native Ninja and LLVM binaries (#1382, #1460) [67e9d9e, 430ac03] * Registered Mozc Starlark macros with build_cleaner [e3e467e] PiperOrigin-RevId: 937168930
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Description
This is a preparation to change the Mozc's installation directory from
"Program Files (x86)"to"Program Files"not only for new installations but also for existing installations (#1086).The ground truth is that TSF-based IMEs need to register their COM DLLs to the registry key
HKEY_CLASSES_ROOT\CLSID, and there are basically two ways to do it in the installer (MSI file):Mozc started with the method A, then switched to the method B (e467907), then switched back to methods A only for universal installer (96bab12), and now is fully switching back to the method A for all the installers with this commit.
The problem is that the method B is feasible only when the COM DLL file name and destination path are determined at the build time, and it is not the case for both universal installer and installation directory migration. Now that all the installers we build (x64 only, ARM64 only, and universal) hit such limitation, there is no reason to keep the method B code path.
Issue IDs
%ProgramFiles%\Mozcrather than%ProgramFiles(x86)%\Mozc#1086Steps to test new behaviors (if any)