Add file and change-block ("hunk") navigation to the focused main view,
mirroring the staging view's hunk keys: `<left>`/`<right>` jump to the
previous/next hunk and `n`/`N` to the next/previous file. A "hunk" here is
lazygit's notion — a run of consecutive added/deleted lines separated by
context, not a git `@@` section — matching what the staging view jumps
between.
This is a consumer of the diff-line primitive in its forward direction:
resolve each rendered row's patch identity, then scan for the next/previous
change block (by the line type) or file boundary (by the path changing). The
file scan lands on the top of the neighbouring file even when a restructuring
pager leaves the header rows untagged, by backing up over them from the
file's first identifiable row — which is impossible without the per-line
metadata once the pager stops emitting a parseable unified diff. The
boundary arithmetic is pulled out into pure functions and unit-tested.
The anchor is the selected line if a selection is showing, else the top
visible line. With a selection we move it to the target and scroll it into
view, like the staging view; with none we stay in scroll mode, bringing the
target to the top without creating a selection.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Escaping a patch explorer (staging / patch building) back to the focused main
view it was entered from used to replay a numeric scroll position and selection
index captured on the way in. But the reason to escape after staging or dropping
a hunk is that the content changed, so a saved index points at the wrong line —
and the host auto-advances the explorer's selection to a still-valid line anyway,
which is the line the user actually cares about returning to.
Restore by *patch identity* instead. On escape, read the (file, type, source
line) the explorer currently has selected, then have the main view's re-render
land on the row that matches it: scan the incoming content as it loads (the
inverse of the diff-line primitive), and once the matching row plus a screenful
below it have loaded, swap the off-screen render in and scroll to / select that
row in one step. FocusPoint with scrollIntoView centres the row only if it's
off-screen, so the common unchanged-content escape — where the row is already
where it was — doesn't move at all. If the line is gone (the content really
changed), nothing is forced.
This generalizes the scroll restore from a fixed origin to a predicate
(RenderRestore: FirstPaintReady decides when the saved position is reachable,
Apply re-establishes it), folding the separate selection restore into the same
first paint — so it no longer rides a post-load callback that could fire early.
The restore also now survives task replacement, which the numeric version did
not: a periodic refresh can stop the escape's re-render before it first-paints.
The pending restore is held on the buffer manager and is *not* cleared when a
task starts, so the replacement task picks it up. It is not gated on the command
key — staging the last unstaged hunk re-renders `git diff` as `git diff --cached`,
a different command, yet the line to land on is still in the new content — but
validates itself: the scan finds the target line only when the content still
contains it, so applying it to a different item is a harmless no-op. A task
clears it once it has applied it (found or not), so it lives for exactly one
re-render. Because the restore is anchored on content identity and is idempotent,
"survive replacement" and "restore by identity" are one mechanism, not two.
With the identity in hand the snapshot no longer needs the captured scroll/index;
they're derived from the explorer's live selection.
The focused main view's click/enter/e/G handlers all need the same thing: given
a rendered diff row, the patch-space line it corresponds to. Until now that came
solely from delta's lazygit-edit:// hyperlinks, which only carry a path and a
single line number — no side. That's lossy: for a deletion the number is the old
line, but the consumers fed it into new-file lookups, and two consecutive
deletions (which share a new-file line number) couldn't be told apart at all.
Replace GetFileAndLineForClickedDiffLine with GetDiffLineInfo, returning the
fuller (file, type, new-line, old-line) record from diff-line-metadata-notes.md.
This is mechanism #1: parse the decolorized view buffer — walk up to the file's
"diff --git" section, reuse patch.Parse on it (splitting multi-file commit diffs
on the "diff --git" boundaries), and read the type and line numbers off the patch
arithmetic. It serves the structure-preserving renderings — no pager, git diff
--color, and delta --color-only without line numbers — with no external
dependency.
To avoid trusting a mis-parse, the parser bails when a hunk's body no longer
matches its header (Patch.IsWellFormed). That's what happens when a pager keeps
the diff/hunk headers but restructures the body: delta's line-number gutters push
the +/- marker off the start of each line, so every body line reads as context.
Such renderings fall through to the next backend rather than yielding a confident
wrong answer. (diff-so-fancy goes further and rewrites the headers too, so it
fails even earlier, on the missing "diff --git".)
GetDiffLineInfo is a seam with swappable backends: the buffer parser first, then
the old hyperlink reader as a fallback for renderings the parser can't handle
(delta's default mode, or delta with line-number gutters). The future #2 OSC
per-cell metadata reader plugs in ahead of both, behind the same record shape.
Wire the consumers to the record per that doc's field mapping:
- dive into staging/patch building lands on the exact patch line, looking a
deletion up by its old-file line number (PatchLineForOldLineNumber) so the
two-deletions case resolves correctly;
- `e` edits at the new-file line;
- `G` anchors the PR link on the left (old) side for a deletion, the right (new)
side otherwise.
The hyperlink fallback can't convey the side, so it reports DiffLineOther, which
the consumers treat as a non-deletion — i.e. exactly today's behavior.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Instead of a user config that always shows a selection on focus, the
focused main view starts without a selection (matching master). Pressing
<space> shows a selection in the middle of the view (no scrolling);
pressing <esc> hides it again before falling through to exiting the view.
I copied all files except dot files (.github and .gitignore), the _examples
folder, and go.mod/go.sum.
At some point we may want to copy the files back to the gocui repo when other
clients (e.g. lazydocker) want to use the newer versions of them.
It's maybe not totally obvious, so let's show it.
Esc now appears twice in the status bar, because the global controller also
appends its generic "Cancel". We'll fix this in the next commit.
The click handler of MainViewController was registered as a global handler, so
it was used when a side panel was focused that doesn't have a
SwitchToFocusedMainViewController attached (e.g. Status, Worktrees, or
Submodules). This handler would then push the main view context, but with the
code that is meant only for toggling between the main view pair contexts, i.e.
with taking over the parentContext from the otherContext, which doesn't have one
at that point. This would later lead to a crash in onClick because the
parentContext was nil.
Fix this by splitting the click handler in two, one for when it already has the
focus, and one for toggling from the other view, and make these focus specific.
In this commit this is only possible by pressing '0' in a side panel; we'll add
mouse clicking later in the branch.
Also, you can't really do anything in the focused view except press escape to
leave it again. We'll add some more functionality in a following commit.
