[datlechin]

Summary

• Preferences → Editor → Keyboard has a Vim Keybindings switch, stored in GSettings (vim-keybindings, off by default). Open editor tabs follow it at once.
• With it on, the SQL editor runs GtkSourceVimIMContext: normal, insert, replace and visual modes. A bar under the text shows the mode and the pending command.
• :w saves as Ctrl+S does. :w name creates that file next to the tab's file and leaves an existing one alone; :w! name replaces it.
• :e reads the tab's file again and asks before it drops changes; :e! does not ask. :e name opens a file in the tab as Open SQL File does.
• :q closes the tab through the same prompts as Ctrl+W. :wq and :x save, then close, and keep the tab when the save fails or is cancelled.
• The editor's Ctrl shortcuts (run, run statement, format, comment, find, find and replace, find next and previous, open, save, save as) work in every Vim mode. App and tab shortcuts already run before the editor.
• Escape is Vim's while it is on, so the Stop button stops a run. Completion runs in insert mode only, and leaving insert mode cancels an open list.
• Save and Save As now report whether the write landed, which :wq waits on. file_write::create_file writes a new file only when none has its name.
• Open SQL File asks first when the tab's file was emptied and not saved; it used to replace it without asking.
• README section, ROADMAP and the settings table in docs/storage.md.

Test plan

• Widget tests: the switch attaches and detaches Vim on open tabs; :q, :w, :wq (a failed write keeps the tab), :x, :w name, :w! name, :e, :e!, :e name; :q goes through the workspace close prompts and closes its own tab.
• Real key tests on X11: x, i, Escape and v in Vim; Ctrl+Return and Ctrl+Shift+Return run from normal and insert mode; Ctrl+/ and Ctrl+F from normal mode and the command line; Escape stays Vim's while a query runs; :w Return saves and :q Return asks to close; leaving insert mode closes the completion list and it stays closed in normal mode; turning Vim off gives completion back.
• Every Ctrl key the editor owns is kept from Vim, checked against the accelerator table.
• verify.sh build, test, lint, l10n and data; meson test under xvfb as the CI fast job.

Screenshots

Preferences → Editor, before and after:

	Light	Dark
Before
After

The editor with Vim on: insert mode, visual line mode, a pending 2d, and :w typed on the command line.

Light	Dark

Fixes #3651