feat: render language server diagnostics and add next/previous diagnostic commands

Bound to Alt-n and Alt-p

src/tui/status/diagstate.zig

@@ -0,0 +1,64 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const nc = @import("notcurses");
+const tp = @import("thespian");
+const tracy = @import("tracy");
+
+const Widget = @import("../Widget.zig");
+const Button = @import("../Button.zig");
+const tui = @import("../tui.zig");
+const command = @import("../command.zig");
+
+errors: usize = 0,
+warnings: usize = 0,
+info: usize = 0,
+hints: usize = 0,
+buf: [256]u8 = undefined,
+rendered: [:0]const u8 = "",
+
+const Self = @This();
+
+pub fn create(a: Allocator, parent: nc.Plane) !Widget {
+    return Button.create_widget(Self, a, parent, .{
+        .ctx = .{},
+        .label = "",
+        .on_click = on_click,
+        .on_layout = layout,
+        .on_render = render,
+        .on_receive = receive,
+    });
+}
+
+fn on_click(_: *Self, _: *Button.State(Self)) void {
+    command.executeName("goto_next_diagnostic", .{}) catch {};
+}
+
+pub fn layout(self: *Self, _: *Button.State(Self)) Widget.Layout {
+    return .{ .static = self.rendered.len };
+}
+
+pub fn render(self: *Self, btn: *Button.State(Self), theme: *const Widget.Theme) bool {
+    const bg_style = if (btn.active) theme.editor_cursor else if (btn.hover) theme.statusbar_hover else theme.statusbar;
+    tui.set_base_style(&btn.plane, " ", bg_style);
+    btn.plane.erase();
+    btn.plane.home();
+    _ = btn.plane.putstr(self.rendered) catch {};
+    return false;
+}
+
+fn format(self: *Self) void {
+    var fbs = std.io.fixedBufferStream(&self.buf);
+    const writer = fbs.writer();
+    if (self.errors > 0) std.fmt.format(writer, "  {d}", .{self.errors}) catch {};
+    if (self.warnings > 0) std.fmt.format(writer, "  {d}", .{self.warnings}) catch {};
+    if (self.info > 0) std.fmt.format(writer, "  {d}", .{self.info}) catch {};
+    if (self.hints > 0) std.fmt.format(writer, "  {d}", .{self.hints}) catch {};
+    self.rendered = @ptrCast(fbs.getWritten());
+    self.buf[self.rendered.len] = 0;
+}
+
+pub fn receive(self: *Self, _: *Button.State(Self), _: tp.pid_ref, m: tp.message) error{Exit}!bool {
+    if (try m.match(.{ "E", "diag", tp.extract(&self.errors), tp.extract(&self.warnings), tp.extract(&self.info), tp.extract(&self.hints) }))
+        self.format();
+    return false;
+}

src/tui/status/statusbar.zig

@@ -16,6 +16,7 @@ pub fn create(a: std.mem.Allocator, parent: Widget) !Widget {
     try w.add(try @import("filestate.zig").create(a, w.plane));
     try w.add(try @import("minilog.zig").create(a, w.plane));
     if (tui.current().config.selectionstate_show) try w.add(try @import("selectionstate.zig").create(a, w.plane));
+    try w.add(try @import("diagstate.zig").create(a, w.plane));
     try w.add(try @import("linenumstate.zig").create(a, w.plane));
     if (tui.current().config.modstate_show) try w.add(try @import("modstate.zig").create(a, w.plane));
     if (tui.current().config.keystate_show) try w.add(try @import("keystate.zig").create(a, w.plane));