ref(event): split Size into two Points (one for the size and one for the anchor / origin)

examples/demo.zig

@@ -13,13 +13,14 @@ const QuitText = struct {
         return .{ .ptr = this, .vtable = &.{ .content = content } };
     }
 
-    pub fn content(ctx: *anyopaque, cells: []zterm.Cell, size: zterm.Size) !void {
+    pub fn content(ctx: *anyopaque, cells: []zterm.Cell, origin: zterm.Point, size: zterm.Point) !void {
         _ = ctx;
-        std.debug.assert(cells.len == @as(usize, size.cols) * @as(usize, size.rows));
+        std.debug.assert(cells.len == @as(usize, size.x) * @as(usize, size.y));
+        _ = origin;
 
-        const row = 2;
-        const col = size.cols / 2 -| (text.len / 2);
-        const anchor = (row * size.cols) + col;
+        const y = 2;
+        const x = size.x / 2 -| (text.len / 2);
+        const anchor = (y * size.x) + x;
 
         for (text, 0..) |cp, idx| {
             cells[anchor + idx].style.fg = .white;
@@ -73,7 +74,7 @@ pub fn main() !void {
 
     var scrollable: App.Scrollable = .{
         .container = box,
-        .min_size = .{ .cols = 60 },
+        .min_size = .{ .x = 60 },
     };
 
     var container = try App.Container.init(allocator, .{
@@ -91,11 +92,11 @@ pub fn main() !void {
             .color = .light_blue,
             .sides = .all,
         },
-        .fixed_size = .{ .cols = 200 },
+        .fixed_size = .{ .x = 200 },
     }, .{}));
     try container.append(try App.Container.init(allocator, .{
         .rectangle = .{ .fill = .blue },
-        .fixed_size = .{ .cols = 30 },
+        .fixed_size = .{ .x = 30 },
     }, .{}));
     defer container.deinit(); // also de-initializes the children
 
@@ -110,7 +111,7 @@ pub fn main() !void {
         switch (event) {
             .init => continue,
             .quit => break,
-            .resize => |size| try renderer.resize(size),
+            .size => |size| try renderer.resize(size),
             .key => |key| {
                 if (key.eql(.{ .cp = 'c', .mod = .{ .ctrl = true } })) app.quit();