Module magit_diff_mode 

MG.5: magit-diff major mode.

Fold audit fix: this used to be a full stub — on_activate registered only a close handler and the buffer opened empty; s/ u were declared in the keymap with no handler of their own, so pressing them silently hijacked whatever magit-status handler happened to be registered (operating on magit-status’s captured buffer state, not this buffer’s cursor). The design’s full side-by-side DiffSession + hunk-level staging (reusing D.4’s pane-group machinery) remains a larger follow-up; this is a real, scoped middle ground: git diff HEAD content (staged + unstaged changes combined, matching the module’s original “against HEAD” framing) with its own file-level s/u/x handlers, scoped to this buffer’s own state.

d on a file in magit-status’s Staged/Unstaged sections (action:magit-diff-file in actions.rs) opens one of these buffers scoped to BOTH a file and a baseline (*magit:diff:staged:<path>* / *magit:diff:unstaged:<path>*), instead of the status buffer’s own inline = toggle — large diffs get a real scrollable buffer instead of ballooning the status buffer’s line count (and re-triggering its splice-based inline-highlight bookkeeping) for a file the user just wants to read in full.

Structs

DiffState

MagitDiffMode

ViewArgsRequests

MG.43h: arguments a dispatch row collected for a view it is about to open.

Type Aliases

DiffStatesHandle

MG.13: service alias for this mode’s per-buffer state (feedback_servicesregistry_arc_typeid).

ViewArgsRequestsHandle