feat(terminal/cursor): add support for cursor shape configuration

src/app.zig

@@ -93,7 +93,7 @@ pub fn App(comptime M: type, comptime E: type) type {
             if (this.termios) |termios| {
                 try terminal.disableMouseSupport();
                 try terminal.showCursor();
-                try terminal.resetCursorColor();
+                try terminal.resetCursor();
                 try terminal.restoreScreen();
                 try terminal.disableRawMode(&termios);
                 try terminal.exitAltScreen();
@@ -427,7 +427,7 @@ pub fn App(comptime M: type, comptime E: type) type {
         pub fn panic_handler(msg: []const u8, _: ?*std.builtin.StackTrace, ret_addr: ?usize) noreturn {
             terminal.disableMouseSupport() catch {};
             terminal.showCursor() catch {};
-            terminal.resetCursorColor() catch {};
+            terminal.resetCursor() catch {};
             terminal.restoreScreen() catch {};
             terminal.disableRawMode(&.{
                 .iflag = .{},

src/ctlseqs.zig

@@ -50,6 +50,7 @@ pub const home = "\x1b[H";
 pub const cup = "\x1b[{d};{d}H";
 pub const hide_cursor = "\x1b[?25l";
 pub const show_cursor = "\x1b[?25h";
+pub const reset_cursor_shape = "\x1b[0 q";
 pub const cursor_shape = "\x1b[{d} q";
 pub const ri = "\x1bM";
 pub const ind = "\n";

src/element.zig

@@ -687,9 +687,11 @@ pub fn Input(Model: type, Event: type, Queue: type) fn (meta.FieldEnum(Event)) t
                     if (this.input.items.len < cells.len) {
                         cells[this.input.items.len - this.cursor_offset].style.cursor = true;
                         cells[this.input.items.len - this.cursor_offset].style.cursor_color = this.configuration.cursor;
+                        cells[this.input.items.len - this.cursor_offset].style.cursor_shape = .bar_blinking;
                     } else {
                         cells[this.input.items.len - offset - this.cursor_offset].style.cursor = true;
                         cells[this.input.items.len - offset - this.cursor_offset].style.cursor_color = this.configuration.cursor;
+                        cells[this.input.items.len - offset - this.cursor_offset].style.cursor_shape = .bar_blinking;
                     }
                 }
             };

src/render.zig

@@ -104,7 +104,7 @@ pub const Buffered = struct {
                         .x = @truncate(col),
                         .y = @truncate(row),
                     };
-                    try cvs.style.set_cursor_color(&writer);
+                    try cvs.style.set_cursor_style(&writer);
                 }
 
                 if (cs.eql(cvs)) continue;

src/style.zig

@@ -13,6 +13,7 @@ bg: Color = .default,
 ul: Color = .default,
 cursor: bool = false,
 cursor_color: Color = .default,
+cursor_shape: CursorShape = .default,
 ul_style: Underline = .off,
 emphasis: []const Emphasis,
 
@@ -37,16 +38,28 @@ pub const Emphasis = enum(u8) {
     strikethrough,
 };
 
+pub const CursorShape = enum(u4) {
+    default = 0,
+    block_blinking = 1,
+    block_steady,
+    underline_blinking,
+    underline_steady,
+    bar_blinking,
+    bar_steady,
+};
+
 pub fn eql(this: Style, other: Style) bool {
+    // TODO should there be a compare for every field?
     return meta.eql(this, other);
 }
 
-pub fn set_cursor_color(this: Style, writer: *std.Io.Writer) !void {
+pub fn set_cursor_style(this: Style, writer: *std.Io.Writer) !void {
     if (!this.cursor) return;
     switch (this.cursor_color) {
         .default => try writer.print(ctlseqs.osc12_reset, .{}),
         else => try writer.print(ctlseqs.osc12_set, .{@tagName(this.cursor_color)}),
     }
+    try writer.print(ctlseqs.cursor_shape, .{@intFromEnum(this.cursor_shape)});
 }
 
 pub fn value(this: Style, writer: *std.Io.Writer, cp: u21) !void {

src/terminal.zig

@@ -42,7 +42,8 @@ pub fn showCursor() !void {
     _ = try posix.write(posix.STDIN_FILENO, ctlseqs.show_cursor);
 }
 
-pub fn resetCursorColor() !void {
+pub fn resetCursor() !void {
+    _ = try posix.write(posix.STDIN_FILENO, ctlseqs.reset_cursor_shape);
     _ = try posix.write(posix.STDIN_FILENO, ctlseqs.osc12_reset);
 }