Click-and-drag in the focused main view turns a hunk selection into a range,
but it was anchored at the change block's far end — where selecting a hunk
leaves the range anchor — rather than the clicked line. And on a context
line, where the click leaves no range anchor at all, dragging just moved the
single selected line instead of opening a range. Remember the line each
mouse-down lands on (the click can show a whole hunk, so it can't be read
back from the view) and, as the drag proceeds, anchor the range there while
the cursor end follows the mouse as gocui already moves it. Works for a click
that focuses the view and for one while it's already focused, on change and
context lines alike.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Step 1 made the focused main view a staging surface for a single line. This
adds the range and hunk selection the staging view has, so you can stage (or
unstage) a range or a whole hunk in place — `v` starts a range, shift-up/down
extend one, `a` toggles hunk selection — without diving into the staging view.
The selection mode (line / range / hunk, plus sticky-range and "the user turned
hunk mode on themselves") lives on MainContext rather than the controller,
because three places need a pane's mode: the main view controller that drives
it, the focus controller that resets it when you focus the view, and togglePanel
which sets it on the *other* pane. The selected line and the range anchor stay
in the gocui view itself (its cursor and rangeSelectStartY), so the existing
native range-select rendering draws the highlight — no new highlight machinery.
Hunk bounds come from the diff-line metadata (the isChange run around the
cursor, via ChangeBlockBounds), not from a parsed patch, so they work over any
conforming rendering. The up/down keys are mode-aware: hunk mode steps hunk to
hunk, a non-sticky range collapses on a plain move, a sticky range extends.
GetOnStageFocusedMainView now takes the selected view-line range instead of one
line; the files handler collects the change lines in the range and applies a
single patch. It identifies each change line's patch line by scanning the parsed
patch and matching (file line number, deletion?) identities, rather than looking
each number up with PatchLineForLineNumber. That lookup can't tell an addition at
the very start of a hunk from the deletion above it, nor an addition from the
deletion it replaces on a modified line — both of which a range routinely spans.
As a side effect this also fixes staging a change on the first line of a file.
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.
When switching to a different repo, and then back to the original one, searching
would no longer work. The reason is that our contexts set callbacks on their
views; when switching to a different repo we instantiate a new set of contexts,
so they will overwrite the views' callbacks with their new ones, but when
switching back to the original repo, we reuse the old contexts because they are
still in memory, but they won't set their callbacks again since they only do
this on construction.
To fix this, replace the view-local callbacks with a global one on the gui that
takes the view as an argument, so that the callback can look up the associated
context dynamically.
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.
