refactor: place .top_right palettes at right edge of centered views

src/tui/mainview.zig

@@ -189,16 +189,24 @@ pub fn update(self: *Self) void {
     self.floating_views.update();
 }
 
-pub fn update_panes_layout(self: *Self) !void {
-    while (self.panes.pop()) |widget| if (widget.dynamic_cast(WidgetList) == null)
-        widget.deinit(self.allocator);
-    const centered_view_width = tui.config().centered_view_width;
+pub fn is_view_centered(self: *const Self) bool {
+    const conf = tui.config();
+    const centered_view_width = conf.centered_view_width;
     const screen_width = tui.screen().w;
     const need_padding = screen_width > centered_view_width;
     const have_vsplits = self.views.widgets.items.len > 1;
-    const have_min_screen_width = screen_width > tui.config().centered_view_min_screen_width;
-    const centered_view = need_padding and tui.config().centered_view and !have_vsplits and have_min_screen_width;
-    if (centered_view) {
+    const have_min_screen_width = screen_width > conf.centered_view_min_screen_width;
+    const centered_view = need_padding and conf.centered_view and !have_vsplits and have_min_screen_width;
+    return centered_view;
+}
+
+pub fn update_panes_layout(self: *Self) !void {
+    while (self.panes.pop()) |widget| if (widget.dynamic_cast(WidgetList) == null)
+        widget.deinit(self.allocator);
+    if (self.is_view_centered()) {
+        const conf = tui.config();
+        const centered_view_width = conf.centered_view_width;
+        const screen_width = tui.screen().w;
         const padding = (screen_width - centered_view_width) / 2;
         try self.panes.add(try self.create_padding_pane(padding, .pane_left));
         try self.panes.add(self.views_widget);

src/tui/mode/overlay/palette.zig

@@ -22,6 +22,12 @@ pub const Menu = @import("../../Menu.zig");
 const max_menu_width = 80;
 const widget_type: Widget.Type = .palette;
 
+pub const Placement = enum {
+    top_center,
+    top_left,
+    top_right,
+};
+
 pub fn Create(options: type) type {
     return struct {
         allocator: std.mem.Allocator,
@@ -35,6 +41,7 @@ pub fn Create(options: type) type {
         entries: std.ArrayList(Entry) = undefined,
         longest_hint: usize = 0,
         initial_selected: ?usize = null,
+        placement: Placement,
 
         items: usize = 0,
         view_rows: usize,
@@ -64,6 +71,13 @@ pub fn Create(options: type) type {
                 .modal = try ModalBackground.create(*Self, allocator, tui.mainview_widget(), .{
                     .ctx = self,
                     .on_click = mouse_palette_menu_cancel,
+                    .on_render = if (@hasDecl(options, "modal_dim"))
+                        if (options.modal_dim)
+                            ModalBackground.Options(*Self).on_render_dim
+                        else
+                            ModalBackground.Options(*Self).on_render_default
+                    else
+                        ModalBackground.Options(*Self).on_render_default,
                 }),
                 .menu = try Menu.create(*Self, allocator, tui.plane(), .{
                     .ctx = self,
@@ -87,6 +101,7 @@ pub fn Create(options: type) type {
                 .mode = try keybind.mode("overlay/palette", allocator, .{
                     .insert_command = "overlay_insert_bytes",
                 }),
+                .placement = if (@hasDecl(options, "placement")) options.placement else .top_center,
             };
             try self.commands.init(self);
             self.mode.event_handler = EventHandler.to_owned(self);
@@ -176,13 +191,43 @@ pub fn Create(options: type) type {
 
         fn prepare_resize(self: *Self) Widget.Box {
             const screen = tui.screen();
-            const w = @max(@min(self.longest + 3, max_menu_width) + 2 + self.longest_hint, options.label.len + 2);
-            const x = if (screen.w > w) (screen.w - w) / 2 else 0;
+            const w = self.prepare_width();
+            return switch (self.placement) {
+                .top_center => self.prepare_resize_top_center(screen, w),
+                .top_left => self.prepare_resize_top_left(screen, w),
+                .top_right => self.prepare_resize_top_right(screen, w),
+            };
+        }
+
+        fn prepare_width(self: *Self) usize {
+            return @max(@min(self.longest + 3, max_menu_width) + 2 + self.longest_hint, options.label.len + 2);
+        }
+
+        fn prepare_resize_at_x(self: *Self, screen: Widget.Box, w: usize, x: usize) Widget.Box {
             self.view_rows = get_view_rows(screen);
             const h = @min(self.items + self.menu.header_count, self.view_rows + self.menu.header_count);
             return .{ .y = 0, .x = x, .w = w, .h = h };
         }
 
+        fn prepare_resize_top_center(self: *Self, screen: Widget.Box, w: usize) Widget.Box {
+            const x = if (screen.w > w) (screen.w - w) / 2 else 0;
+            return self.prepare_resize_at_x(screen, w, x);
+        }
+
+        fn prepare_resize_top_left(self: *Self, screen: Widget.Box, w: usize) Widget.Box {
+            return self.prepare_resize_at_x(screen, w, 0);
+        }
+
+        fn prepare_resize_top_right(self: *Self, screen: Widget.Box, w: usize) Widget.Box {
+            const x = if (screen.w > w) (screen.w - w) else 0;
+            if (tui.mainview()) |mv| if (mv.is_view_centered()) {
+                const centered_view_width = tui.config().centered_view_width;
+                const right_edge = ((screen.w - centered_view_width) / 2) + centered_view_width;
+                return self.prepare_resize_at_x(screen, w, @min(x, right_edge));
+            };
+            return self.prepare_resize_at_x(screen, w, x);
+        }
+
         fn after_resize_menu(self: *Self, _: *Menu.State(*Self), _: Widget.Box) void {
             return self.after_resize();
         }

src/tui/mode/overlay/symbol_palette.zig

@@ -19,6 +19,8 @@ pub const label = "Go to Symbol";
 pub const name = "Go to";
 pub const description = "Symbols in scope";
 pub const icon = "󱎸  ";
+pub const modal_dim = false;
+pub const placement = .top_right;
 
 const Column = struct {
     label: []const u8,