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Release v0.6.39: isolate history UI and image clipboard memory

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Anatolii Hrynchuk
2026-11-04 19:40:54 +02:00
parent fa2f6d2ce4
commit 00c9cb0ee4
22 changed files with 747 additions and 49 deletions
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README.md
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@@ -720,8 +720,10 @@ Consecutive duplicates use SHA-256 fingerprints inside the encrypted history ind
Moving OCR isolates its temporary memory rather than reducing the combined processing peak. A controlled three-run comparison retained about 0.8 MiB less private RAM in the caller after recognition; combined peak RAM was about 55.6 MiB before and 56.6 MiB with the helper. Results depend on the image, OCR engine and system.
### History previews and Escape — v0.6.38
### History process and clipboard memory — v0.6.39
History initializes RichEdit only for HTML/RTF previews. Plain text keeps Unicode and line breaks without RTF conversion; empty history and image-only previews do not load RichEdit unnecessarily. Plain and formatted text previews share the existing bounded text-preview cache.
History opens in a separate, short-lived instance of **KSwitcher.exe**. **Esc** closes it even when focus is on the window or an action button, releasing Windows UI allocations with the process. The resident keeps keyboard hooks, clipboard capture and history storage. Search, selection and the top entry are preserved in encrypted view state. If a full-text item viewer is still open, the helper stays alive until the last viewer closes. Pin/delete, formatted/plain paste and OCR remain available; settings and default shortcuts are unchanged.
Esc clears hidden rows/caches and cancels obsolete queued preview work, while retaining the selected/top entry for reopening. Already-needed RichEdit controls are cleared and reused. Clipboard contents, paste formatting, OCR, settings and shortcuts are unchanged. A local isolated comparison saved approximately 0.48–0.72 MiB private working set after Esc depending on content; this is not a fixed application footprint or a guarantee that all UI memory returns to the startup level.
Image thumbnails are decoded in **KSwitcher.Screenshot.exe**, returning only bounded preview pixels. Image clipboard backup/restore also uses that helper and encrypted temporary files, with clipboard-sequence checks before restoring. Selection reads avoid loading image formats. Keep all three executables together; no fourth executable is required. Paste allows a brief foreground handoff after history closes while preserving cancellation checks. UI Automation remains in the resident.
A live development-build test measured **4.37 MiB before history and 4.35 MiB after two open/Esc cycles**, compared with an earlier roughly 8–9 MiB plateau. A same-image clipboard-backup benchmark retained **12.78 MiB before versus 0.05 MiB after**. These measure private working set, not a guaranteed total footprint. Include all helpers when measuring active use: combined memory can be higher while history is open. No forced working-set trimming is used. Existing screenshots and shortcuts remain applicable. The v0.6.38 approach of retaining a hidden history window/RichEdit control is superseded by process termination.