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fix: retain alternate screen across executable restart

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Valdemar Høgsvig Lorenzen
2026-10-12 23:26:38 +02:00
parent d85998e1cb
commit c35abe0f03
6 changed files with 273 additions and 103 deletions
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docs/editing.md
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@@ -174,7 +174,7 @@ Commands: `:save [path]`, `:force_save [path]`, `:quit`, `:force_quit`, `:restar
`:restart` closes clean buffers across all tabs, panes, and historical views. If any dirty buffer remains, it preserves that buffer's unsaved text and undo/redo history, warns, and keeps the editor interactive; clean buffers already closed stay closed. With no dirty buffers, it restarts the executable. `:force_restart` (alias `:restart!`) restarts regardless of dirty buffers, discarding unsaved text without writing it. Both commands take no arguments; their Normal-mode actions are `core.restart` and `core.force_restart`, with no default keybindings. Selecting force restart in the command palette requires confirmation; an explicitly configured force-restart binding executes directly.
Restart restores the terminal and tears down the entire editor session, including workers and plugins, before relaunching the same executable with its original CLI arguments. The new process rereads configuration and reopens the original startup file from disk, or starts with an unnamed buffer if no file was supplied. Current buffers, tabs, views, and other session state are not restored.
Restart tears down the entire editor session, including workers and plugins, before relaunching the same executable with its original CLI arguments. It briefly resets raw mode and input reporting but retains the alternate screen across the process handoff; the new process resumes input modes and clears and repaints that screen atomically in its first frame. The new process rereads configuration and reopens the original startup file from disk, or starts with an unnamed buffer if no file was supplied. Current buffers, tabs, views, and other session state are not restored. Final quit, errors, and panics still restore normal input modes, the normal screen, cursor visibility, and the prior panic hook.
All saves use a same-directory temporary file and rename and preserve existing permissions. UTF-8 text is edited by extended grapheme; tabs render at four-cell stops. LF and trailing-newline structure are preserved; CRLF and CR are normalized to LF. Binary/terminal-control-containing text is rejected. Bracketed paste inserts only in Insert mode and never executes pasted commands in Normal mode.