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feat: add configurable diff modes and split orientation

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Valdemar Høgsvig Lorenzen
2026-10-12 23:43:15 +02:00
parent c35abe0f03
commit d1855dbdb7
14 changed files with 847 additions and 169 deletions
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docs/editing.md
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@@ -327,7 +327,11 @@ The selector initially lists local revisions and known tracking refs **without c
Comparison discovery builds the changed-path/status catalog first. File text, notices, and hunks load asynchronously when a file is selected and remain cached for that comparison. Failed file loads can be retried by selecting the file again; cancelled or superseded results cannot replace the current selection. Working-checkout comparisons still capture working bytes and the historical content needed to identify changes, preserving the frozen Before snapshot and unsaved After buffers.
The changed-file explorer is **docked on the right**. Modified files show Before on the left and After on the right. Added files show only After, using the full text workspace; deleted files show only Before. Rename-only files show one empty pane, with the old and new paths in the explorer; renames with text or final-newline changes retain the split view. Before and historical/remote After snapshots are read-only. Selecting **Working checkout** as After binds eligible regular UTF-8 files to normal editor buffers, reusing already-open dirty buffers and their undo history. Editable After supports native edits, completion, undo/redo, and `:w`. Removed files, rename-only files, binary files, symlinks, and submodules remain read-only. Closing the diff keeps its buffers and unsaved edits.
The changed-file explorer is **docked on the right**. In the default split layout, modified files show Before on the left and After on the right. Added files show only After, using the full text workspace; deleted files show only Before. Rename-only files show one empty pane, with the old and new paths in the explorer; renames with text or final-newline changes retain both source sides. Before and historical/remote After snapshots are read-only. Selecting **Working checkout** as After binds eligible regular UTF-8 files to normal editor buffers, reusing already-open dirty buffers and their undo history. Editable After supports native edits, completion, undo/redo, and `:w`. Removed files, rename-only files, binary files, symlinks, and submodules remain read-only. Closing the diff keeps its buffers and unsaved edits.
Comparisons start in **split, left/right** view by default. In Normal mode, **Space v** cycles split/unified; **Space s** switches a split between left/right and above/below (Before above, After below). Canonical commands are `:diff.view.toggle` and `:diff.orientation.toggle`; both are available in the palette and as remappable `config.core.diff.view.toggle` / `config.core.diff.orientation.toggle` actions. Configure new-comparison defaults with `config.diff_view_mode = "split"` or `"unified"` and `config.diff_split_orientation = "left_right"` or `"above_below"`. Current choices survive file and tab switches; closing and reopening uses the configured defaults. Orientation stays unchanged while unified is active.
**Unified** uses one full-width text pane with both original line-number columns: context appears once, then each changed run shows removed (`-`) lines followed by added (`+`) lines, without alignment holes. Tab/Shift+Tab still switches logical Before/After focus, preserving native source coordinates, read-only protection, and Working After editing. The border shows the combined revisions and the focused side's editability. Word wrap, syntax/semantic and character highlighting, search, selections, excerpt expansion, and wheel scrolling work in either view.
Diff metadata lives in the text-pane borders instead of a separate info row: split panes show their own Before/After revision labels at the bottom-left; a single visible pane shows the combined `before → after` label there. Each pane shows its read-only/editable state at the top-right, independently of keyboard focus. Before is always read-only; After is editable only for an eligible Working-checkout file. The changed-file explorer and panes start directly below configured chrome, and there is no native-buffer help footer. Loading/error/file notices remain visible when applicable. Narrow borders prioritize state and clip titles without painting over the gutter or source text.