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add(element): interface for injecting user behavior to containers

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Some additional refactoring and documentation updates have also been
applied.
This commit is contained in:
Yves Biener
2025-02-15 15:56:30 +01:00
parent 5c148e1aa5
commit 4781e9ce39
5 changed files with 128 additions and 45 deletions
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45
src/container.zig
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@@ -27,17 +27,12 @@ pub const Border = packed struct {
left: bool = false,
right: bool = false,
pub fn all() @This() {
return .{ .top = true, .bottom = true, .left = true, .right = true };
}
pub fn horizontal() @This() {
return .{ .left = true, .right = true };
}
pub fn vertical() @This() {
return .{ .top = true, .bottom = true };
}
/// Enable border sides for all four sides
pub const all: @This() = .{ .top = true, .bottom = true, .left = true, .right = true };
/// Enable border sides for the left and right sides
pub const horizontal: @This() = .{ .left = true, .right = true };
/// Enable border sides for the top and bottom sides
pub const vertical: @This() = .{ .top = true, .bottom = true };
} = .{},
/// Configure separator borders between child element to added to the layout
separator: packed struct {
@@ -235,10 +230,12 @@ pub fn Container(comptime Event: type) type {
if (!isTaggedUnion(Event)) {
@compileError("Provided user event `Event` for `Container(comptime Event: type)`");
}
const Element = @import("element.zig").Element(Event);
return struct {
allocator: std.mem.Allocator,
size: Size,
properties: Properties,
element: Element,
elements: std.ArrayList(@This()),
/// Properties for each `Container` to configure their layout,
@@ -251,11 +248,16 @@ pub fn Container(comptime Event: type) type {
layout: Layout = .{},
};
pub fn init(allocator: std.mem.Allocator, properties: Properties) !@This() {
pub fn init(
allocator: std.mem.Allocator,
properties: Properties,
element: Element,
) !@This() {
return .{
.allocator = allocator,
.size = .{},
.properties = properties,
.element = element,
.elements = std.ArrayList(@This()).init(allocator),
};
}
@@ -273,7 +275,6 @@ pub fn Container(comptime Event: type) type {
pub fn handle(this: *@This(), event: Event) !void {
switch (event) {
.init => log.debug(".init event", .{}),
.resize => |size| resize: {
log.debug("Event .resize: {{ .anchor = {{ .col = {d}, .row = {d} }}, .cols = {d}, .rows = {d} }}", .{
size.anchor.col,
@@ -384,29 +385,29 @@ pub fn Container(comptime Event: type) type {
}
// border resizing
if (sides.top) {
element_size.anchor.row += 1;
}
if (sides.left) {
element_size.anchor.col += 1;
}
// padding resizing
if (sides.top) element_size.anchor.row += 1;
if (sides.left) element_size.anchor.col += 1;
try element.handle(.{ .resize = element_size });
}
},
else => for (this.elements.items) |*element| try element.handle(event),
else => {
try this.element.handle(event);
for (this.elements.items) |*element| try element.handle(event);
},
}
}
pub fn contents(this: *const @This()) ![]const Cell {
const cells = try this.allocator.alloc(Cell, @as(usize, this.size.cols) * @as(usize, this.size.rows));
@memset(cells, .{});
errdefer this.allocator.free(cells);
this.properties.border.contents(cells, this.size, this.properties.layout, @truncate(this.elements.items.len));
this.properties.rectangle.contents(cells, this.size);
try this.element.content(cells, this.size);
return cells;
}
};