feat: add basic POC support for kitty multi cursor protocol

build.zig.zon

@@ -30,8 +30,8 @@
             .hash = "fuzzig-0.1.1-AAAAALNIAQBmbHr-MPalGuR393Vem2pTQXI7_LXeNJgX",
         },
         .vaxis = .{
-            .url = "git+https://github.com/neurocyte/libvaxis?ref=main#beb82aa0a9d77f63462f8ca8250c2b9eecf057a2",
+            .url = "git+https://github.com/neurocyte/libvaxis?ref=main#b3c4a114dad73dcec94ffef2b0d3373a078c263c",
-            .hash = "vaxis-0.5.1-BWNV_FMWCQDGtkYFKz_85wSkBRO1kynUZaPO1-RCSrQM",
+            .hash = "vaxis-0.5.1-BWNV_JkcCQDV7RK7e_lzY4EyrQY5XfBod_C0nQi_q615",
         },
         .zeit = .{
             .url = "https://github.com/rockorager/zeit/archive/8fd203f85f597f16e0a525c1f1ca1e0bffded809.tar.gz",

src/renderer/vaxis/renderer.zig

@@ -382,6 +382,11 @@ pub fn process_renderer_event(self: *Self, msg: []const u8) Error!void {
             self.vx.caps.rgb = true;
         },
         .cap_color_scheme_updates => {},
+
+        .cap_multi_cursor => {
+            self.logger.print("multi cursor capability detected", .{});
+            self.vx.caps.multi_cursor = true;
+        },
     }
 }
 
@@ -535,6 +540,14 @@ pub fn cursor_disable(self: *Self) void {
     self.vx.screen.cursor_vis = false;
 }
 
+pub fn clear_all_multi_cursors(self: *Self) !void {
+    try self.tty.anyWriter().print("\x1b[>0;4 q", .{});
+}
+
+pub fn show_multi_cursor_yx(self: *Self, y: c_int, x: c_int) !void {
+    try self.tty.anyWriter().print("\x1b[>-1;2:{d}:{d} q", .{ y + 1, x + 1 });
+}
+
 fn sync_mod_state(self: *Self, keypress: u32, modifiers: vaxis.Key.Modifiers) !void {
     if (modifiers.ctrl and !self.mods.ctrl and !(keypress == input.key.left_control or keypress == input.key.right_control))
         try self.send_sync_key(input.event.press, input.key.left_control, "", modifiers);

src/tui/editor.zig

@@ -1179,6 +1179,8 @@ pub const Editor = struct {
         const style = tui.get_selection_style();
         const frame = tracy.initZone(@src(), .{ .name = "editor render cursors" });
         defer frame.deinit();
+        if (tui.config().enable_terminal_cursor and tui.rdr().vx.caps.multi_cursor)
+            tui.rdr().clear_all_multi_cursors() catch {};
         for (self.cursels.items[0 .. self.cursels.items.len - 1]) |*cursel_| if (cursel_.*) |*cursel| {
             const cursor = try self.get_rendered_cursor(style, cursel);
             try self.render_cursor_secondary(&cursor, theme, cell_map);
@@ -1207,7 +1209,9 @@ pub const Editor = struct {
                 set_cell_map_cursor(cell_map, pos.row, pos.col);
                 const y, const x = self.plane.rel_yx_to_abs(@intCast(pos.row), @intCast(pos.col));
                 const configured_shape = tui.get_cursor_shape();
-                const cursor_shape = if (self.cursels.items.len > 1) switch (configured_shape) {
+                const cursor_shape = if (tui.rdr().vx.caps.multi_cursor)
+                    configured_shape
+                else if (self.cursels.items.len > 1) switch (configured_shape) {
                     .beam => .block,
                     .beam_blink => .block_blink,
                     .underline => .block,
@@ -1224,8 +1228,13 @@ pub const Editor = struct {
     fn render_cursor_secondary(self: *Self, cursor: *const Cursor, theme: *const Widget.Theme, cell_map: CellMap) !void {
         if (self.screen_cursor(cursor)) |pos| {
             set_cell_map_cursor(cell_map, pos.row, pos.col);
-            self.plane.cursor_move_yx(@intCast(pos.row), @intCast(pos.col)) catch return;
+            if (tui.config().enable_terminal_cursor and tui.rdr().vx.caps.multi_cursor) {
-            self.render_cursor_cell(theme.editor_cursor_secondary);
+                const y, const x = self.plane.rel_yx_to_abs(@intCast(pos.row), @intCast(pos.col));
+                tui.rdr().show_multi_cursor_yx(y, x) catch return;
+            } else {
+                self.plane.cursor_move_yx(@intCast(pos.row), @intCast(pos.col)) catch return;
+                self.render_cursor_cell(theme.editor_cursor_secondary);
+            }
         }
     }