michal-ruzicka/TCOfficeView v2.4.0 on GitHub

[v2.4.0] – 2026-07-09

Full mode (and the mode-switch button) now covers OpenDocument files, Office templates and PowerPoint slideshows. Previously only the classic Office extensions were recognised as Word / Excel / PowerPoint documents; everything else — including formats those applications open natively — was treated as a generic preview-handler file, so the → Full button never appeared and the quick→full auto-fallback never fired. The recognised set now additionally includes:
- Word — ODT (OpenDocument Text), DOT, DOTX (templates)
- Excel — ODS (OpenDocument Spreadsheet), XLT, XLTX (templates)
- PowerPoint — ODP (OpenDocument Presentation), PPS, PPSX (slideshows), POT, POTX (templates)
OpenDocument templates (OTT, OTS, OTP) are not included because Microsoft Office does not open them.

Full mode no longer executes document macros. Office applications driven via OLE Automation default to msoAutomationSecurityLow, so a full-mode preview of a document with VBA macros used to run its AutoOpen/Document_Open code without any prompt: automation opens bypass both Protected View and the "Enable Content" notification bar. In practice this affected XLSB and the legacy DOC / XLS / PPT formats (the explicitly macro-enabled DOCM / XLSM / PPTM never reach the plugin at all — see the note below). The host now sets Application.AutomationSecurity = msoAutomationSecurityForceDisable on every Word / Excel / PowerPoint instance it creates, so previews never execute macros in either mode (quick previews could never run them). The setting is per-instance and runtime-only — it does not change the user's Office configuration. To run a document's macros, open the file in the Office application itself.
Note that Office deliberately registers no preview handler for any of its macro-enabled formats (DOCM, DOTM, XLSM, XLTM, PPTM, PPSM, POTM) — those files preview neither in Windows Explorer's Alt+P pane nor in this plugin, which steps aside so Total Commander's next viewer takes over. XLSB is the exception: it can carry macros yet has a preview handler registered, which is one more reason the defence is the automation setting rather than an extension list. This is now documented in README.md.

The full-mode overlay window can no longer be moved or resized by the user. The borderless Office window floated over the Lister pane could be dragged away by the free space of its title bar, or resized by grabbing its edges (typically by accident, when aiming for the Lister's edge), and stayed displaced until the pane itself changed. The overlay tracker now cancels such a drag the moment it starts — the window never leaves its place — and additionally snaps the window back over the pane whenever its position or size drifts for any other reason.
GitHub CI build restored. The workflow now uses the CMake (and Ninja) bundled with the Visual Studio Build Tools via the VC.CMake.Project component instead of installing CMake separately through winget. This also keeps the local and CI toolchains identical for reproducible builds. The pinned compiler version was bumped to 19.51.36248 to match the current Build Tools release, and setup-build-environment-example.cmd now accepts the installer's reboot-requested exit code (3010) as success.