feat(Framing): border, style, title with styling

src/layout/Framing.zig

@@ -8,6 +8,7 @@ const terminal = @import("../terminal.zig");
 const isTaggedUnion = @import("../event.zig").isTaggedUnion;
 const Error = @import("../event.zig").Error;
 const Key = terminal.Key;
+const Style = terminal.Style;
 
 const log = std.log.scoped(.layout_framing);
 
@@ -24,9 +25,27 @@ pub fn Layout(comptime Event: type, comptime Renderer: type) type {
         size: terminal.Size = undefined,
         element: Element = undefined,
         events: Events = undefined,
+        config: Config = undefined,
 
-        pub fn init(allocator: std.mem.Allocator, element: Element) @This() {
+        const Config = struct {
+            style: Style = .{ .fg = .default },
+            frame: Frame = .round,
+            title: Title = .{},
+
+            const Title = struct {
+                str: []const u8 = &.{},
+                style: Style = .{ .fg = .default },
+            };
+
+            const Frame = enum {
+                round,
+                square,
+            };
+        };
+
+        pub fn init(allocator: std.mem.Allocator, config: Config, element: Element) @This() {
             return .{
+                .config = config,
                 .element = element,
                 .events = Events.init(allocator),
             };
@@ -96,18 +115,28 @@ pub fn Layout(comptime Event: type, comptime Renderer: type) type {
             return &this.events;
         }
 
-        pub fn render(this: *@This(), renderer: Renderer) !void {
-            // TODO: render frame around the "1" padding
-            try renderer.clear(this.size);
-            // NOTE: round corners: .{ "╭", "─", "╮", "│", "╯", "╰" }
-            // NOTE: hard corners: .{ "┌", "─", "┐", "│", "┘", "└" }
+        const round_frame = .{ "╭", "─", "╮", "│", "╰", "╯" };
+        const square_frame = .{ "┌", "─", "┐", "│", "└", "┘" };
+
+        fn renderFrame(this: *@This(), renderer: Renderer) !void {
+            // FIXME: use renderer instead!
+            _ = renderer;
+            const frame = switch (this.config.frame) {
+                .round => round_frame,
+                .square => square_frame,
+            };
+            std.debug.assert(frame.len == 6);
             // render top: +---+
             try terminal.setCursorPosition(this.size.anchor);
-            _ = try terminal.write("╭");
-            for (0..this.size.cols -| 2) |_| {
-                _ = try terminal.write("─");
+            const writer = terminal.writer();
+            try this.config.style.value(writer, frame[0]);
+            if (this.config.title.str.len > 0) {
+                try this.config.title.style.value(writer, this.config.title.str);
             }
-            _ = try terminal.write("╮");
+            for (0..this.size.cols -| 2 -| this.config.title.str.len) |_| {
+                try this.config.style.value(writer, frame[1]);
+            }
+            try this.config.style.value(writer, frame[2]);
             // render left: |
             for (1..this.size.rows -| 1) |r| {
                 const row: u16 = @truncate(r);
@@ -115,7 +144,7 @@ pub fn Layout(comptime Event: type, comptime Renderer: type) type {
                     .col = this.size.anchor.col,
                     .row = this.size.anchor.row + row,
                 });
-                _ = try terminal.write("│");
+                try this.config.style.value(writer, frame[3]);
             }
             // render right: |
             for (1..this.size.rows -| 1) |r| {
@@ -124,18 +153,23 @@ pub fn Layout(comptime Event: type, comptime Renderer: type) type {
                     .col = this.size.anchor.col + this.size.cols -| 1,
                     .row = this.size.anchor.row + row,
                 });
-                _ = try terminal.write("│");
+                try this.config.style.value(writer, frame[3]);
             }
             // render bottom: +---+
             try terminal.setCursorPosition(.{
                 .col = this.size.anchor.col,
                 .row = this.size.anchor.row + this.size.rows,
             });
-            _ = try terminal.write("╰");
+            try this.config.style.value(writer, frame[4]);
             for (0..this.size.cols -| 2) |_| {
-                _ = try terminal.write("─");
+                try this.config.style.value(writer, frame[1]);
             }
-            _ = try terminal.write("╯");
+            try this.config.style.value(writer, frame[5]);
+        }
+
+        pub fn render(this: *@This(), renderer: Renderer) !void {
+            try renderer.clear(this.size);
+            try this.renderFrame(renderer);
 
             switch ((&this.element).*) {
                 .layout => |*layout| {