Staging a selection walks the file's diff to find the lines the user
pointed at, by where each of them sits in the file. The next commit needs
the same answer for a single row, so pull the walk out of the staging path
before there are two copies of it.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Two space presses in quick succession only staged one hunk. Input is
withheld until the refresh has landed, which is enough where the diff is
rebuilt on the spot, but the main view re-renders asynchronously: the
selection only moves to the next change once that render is on screen, so
the second press acted on lines that were no longer in the diff, and
staged nothing.
So the wait is now for the selection to be where the work carries on from,
rather than for the model. A restore therefore has to say when it is done —
which it can be either way, since a view given a message rather than a
re-render now gives up the restore it was holding instead of leaving it to
claim some later render.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Two things about a diff command follow from what its output is for: whether
the diff renderer produces it, and whether it is coloured. That was a
`plain` flag, which covers two of the three cases — the diff as configured,
and git's own uncoloured diff for building patches out of — and leaves no
room for the third, which is about to be needed: git's own diff, coloured,
for showing where the renderer's version of it can't be acted on.
So the flag becomes a mode. It also takes over deciding the colour, which
each command spelled out for itself, and it settles a question the flag
couldn't put: whether ignoring whitespace applies. It is about what the user
wants to see, so it holds for anything shown, and not for a diff a patch is
built from, which has to describe every change.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
The remove key now works on a diff selection the way it does in the staging
view: on the unstaged side it throws the selected lines away, which it asks
about first, and on the staged side it takes them out of the index, which is
unstaging and needs no warning.
It goes through the same path as staging, so that everything around the
action behaves identically — the selection lands on the change that took the
place of the discarded one, and the focus follows the side it acted on.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Each side of a file's diff has a pane of its own, but a pane is only shown
while its side has something in it: staging the last unstaged change takes
the upper pane away, and unstaging the last staged one takes the lower one
away. The focus follows into the pane that is left, and the selection has to
be waiting there when it arrives — on the lines just acted on, which is where
they are now, unless they were discarded rather than moved, in which case on
what is left of the file. The pane being moved to shows no selection until
the restore places one, so that the selection it was left with the last time
it was used doesn't appear for a frame.
Whether the acted-on side still holds anything is a question the model can't
answer: a refresh only queues its update, and by the time it lands the
re-render this has to ride is already under way. So the answer is worked out
from what we just did — the files we changed report whether the selection
covered all of their changes, and the ones it didn't touch are as the model
describes them.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Staging takes the lines it acted on out of the diff, so the selection has
nothing to sit on afterwards and would be left wherever those lines used to
be. What the user wants is the change that moved up into their place, so
that pressing the key again goes on to the next one — which is how staging
line by line through a file works.
The line acted on is gone, so it can't be remembered by identity the way a
re-render of the same diff remembers one; what is remembered instead is its
place in the sequence of the diff's changes, which the change after it
inherits. Staging the last change is the one case with nothing to inherit
it, and there the selection stays on the last change there is.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
The diff of a deleted file is its content going away, so putting every
line of it into the index leaves an empty file there (modified in the
index, deleted in the working tree) rather than the deletion the user
selected. The reverse case matches: the diff of an added file is its
whole content, and taking all of it back out of the index leaves the file
tracked and empty rather than untracked again. In the staging view you
had to enter such a file deliberately to reach these cases, but stepping
through a directory's diff hunk by hunk runs into them routinely.
Selecting every change of a file says "this file", so stage or unstage
the file itself. This applies to any file, since applying a file's whole
diff amounts to the same thing everywhere else.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Space in the focused main view now acts on the selected lines the way it
does in the staging view: over the working tree's unstaged changes it puts
them into the index, and over the staged ones it takes them back out. Which
of the two it does is a property of the pane, each side of the diff having
one of its own. Nothing has to be entered first, and a selection reaching
across several files of a directory's diff is applied as one patch per file.
The rows on screen are only a picture of the diff, so the patch is built
from the diff itself: each selected row's identity — which file, which line
of it, and whether it is a deletion — is looked for in the file's own diff,
and the lines that match are the ones the patch includes. Matching by
position rather than by counting rows is what tells the two halves of a
modified line apart, since the deletion and the addition replacing it sit at
the same place in the new file.
Panels other than the working tree offer no action on their diff yet, so
space says nothing and does nothing there.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
The main view shows a diff renderer's picture of a diff, and that is not
what you want on your clipboard: a renderer may drop the +/- column, move
the line numbers into a gutter, group a hunk's deletions before its
additions, or leave lines out altogether. So copying takes the lines from
the diff itself, locating them by the identity of the selected rows.
Only the panel that produced the diff can produce it again, though: the
working tree's staged or unstaged side, a commit's, a stash entry's. The
new seam is there for that. It asks per file, so that copying three lines
of a commit's diff doesn't fetch the whole of it, and it will grow the
actions on a selection as staging and patch building arrive.
The clipboard gets the run of diff lines from the first selected line of
a file to the last, so that lines the renderer hid come along and the
result still reads as a diff. Headers count as selected lines too. A hunk
header names the first line of its hunk, so it is looked for the way a
line of the file is. A file header names no line at all, and a rendering
may draw it over any number of rows, so a selection touching one of them
takes the whole header.
As in the patch explorers, a selection that is all additions or all
deletions loses its +/- column, ready to be pasted into code. One that
reaches into a header keeps the columns, and what comes out is a patch
fragment rather than lines of code.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Stefan HallerandClaude Opus 5