neurocyte/flow
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fix: pull the last line of a file up or down

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closes #527
This commit is contained in:
CJ van den Berg 2026-04-14 22:56:08 +02:00
parent 1e7d595309
commit 66ed4a5af4
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
1 changed files with 51 additions and 5 deletions
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56
src/tui/editor.zig
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@ -4232,11 +4232,25 @@ pub const Editor = struct {
fn pull_cursel_up(self: *Self, root_: Buffer.Root, cursel: *CurSel, allocator: Allocator) error{Stop}!Buffer.Root {
var root = root_;
const saved = cursel.*;
errdefer cursel.* = saved;
const sel = cursel.expand_selection_to_line(root, self.metrics);
var sfa = std.heap.stackFallback(4096, self.allocator);
const sfa_allocator = sfa.get();
const cut_text = copy_selection(root, sel.*, sfa_allocator, self.metrics) catch return error.Stop;
defer sfa_allocator.free(cut_text);
const cut_text_raw = copy_selection(root, sel.*, sfa_allocator, self.metrics) catch return error.Stop;
defer sfa_allocator.free(cut_text_raw);
const is_last_no_nl = sel.end.row == cursel.cursor.row;
var cut_text_buf: ?[]u8 = null;
defer if (cut_text_buf) |t| sfa_allocator.free(t);
const cut_text: []const u8 = if (is_last_no_nl) blk: {
const buf = sfa_allocator.alloc(u8, cut_text_raw.len + 1) catch return error.Stop;
cut_text_buf = buf;
@memcpy(buf[0..cut_text_raw.len], cut_text_raw);
buf[cut_text_raw.len] = '\n';
break :blk buf;
} else cut_text_raw;
root = try self.delete_selection(root, cursel, allocator);
try cursel.cursor.move_up(root, self.metrics);
root = self.insert(root, cursel, cut_text, allocator) catch return error.Stop;
@ -4246,6 +4260,17 @@ pub const Editor = struct {
try sel_.begin.move_up(root, self.metrics);
try sel_.end.move_up(root, self.metrics);
}
if (is_last_no_nl) {
const last_content_row = root.lines() - 2;
var del_begin: Cursor = .{ .row = last_content_row, .col = 0 };
del_begin.move_end(root, self.metrics);
var tmp: CurSel = .{
.cursor = del_begin,
.selection = .{ .begin = del_begin, .end = .{ .row = last_content_row + 1, .col = 0 } },
};
root = try self.delete_selection(root, &tmp, allocator);
}
return root;
}
@ -4260,14 +4285,35 @@ pub const Editor = struct {
fn pull_cursel_down(self: *Self, root_: Buffer.Root, cursel: *CurSel, allocator: Allocator) error{Stop}!Buffer.Root {
var root = root_;
const saved = cursel.*;
errdefer cursel.* = saved;
const cursor_row_before = cursel.cursor.row;
const lines_before = root.lines();
const sel = cursel.expand_selection_to_line(root, self.metrics);
var sfa = std.heap.stackFallback(4096, self.allocator);
const sfa_allocator = sfa.get();
const cut_text = copy_selection(root, sel.*, sfa_allocator, self.metrics) catch return error.Stop;
const cut_text = if (sel.empty())
&.{}
else
copy_selection(root, sel.*, sfa_allocator, self.metrics) catch return error.Stop;
defer sfa_allocator.free(cut_text);
root = try self.delete_selection(root, cursel, allocator);
try cursel.cursor.move_down(root, self.metrics);
root = self.insert(root, cursel, cut_text, allocator) catch return error.Stop;
const moved_down = blk: {
cursel.cursor.move_down(root, self.metrics) catch break :blk false;
break :blk true;
};
if (moved_down) {
root = self.insert(root, cursel, cut_text, allocator) catch return error.Stop;
} else {
if (cursor_row_before >= lines_before - 1) return error.Stop;
cursel.cursor.move_end(root, self.metrics);
root = self.insert(root, cursel, "\n", allocator) catch return error.Stop;
const cut_no_nl = if (std.mem.endsWith(u8, cut_text, "\n"))
cut_text[0 .. cut_text.len - 1]
else
cut_text;
if (cut_no_nl.len > 0)
root = self.insert(root, cursel, cut_no_nl, allocator) catch return error.Stop;
}
cursel.* = saved;
try cursel.cursor.move_down(root, self.metrics);
if (cursel.selection) |*sel_| {