Diving into staging or patch building from a focused main view (by
double-clicking a line, or pressing enter on the selected line) always
landed on a single-line selection. Entering the same views through the
side panel honours the UseHunkModeInStagingView config and selects the
whole hunk by default. The two ways in should agree, so that diving in
from the main view feels like the established flow.
A non-negative line index in NewState was overloaded for two intents:
clicking directly on the patch explorer view (where a single-line range
is the start of a drag) and diving in from the main view (where we want
the default select mode). Distinguish them with SelectLineInDefaultMode
on OnFocusOpts: the main-view entry points set it; the click-to-drag
path does not.
In hunk mode the selection covers the block of changes around the
clicked line. A context line has no surrounding changes, so we snap to
the next change line (as toggling hunk mode does); the clicked context
line itself is then not part of the selection.
This is a separate commit only because the branch is a throwaway
prototype; in a real history it would be folded into the commit that
introduces the focused-main-view enter behavior rather than landing on
top of it.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>