Add central Widget struct + clean up code

In particular, move all termbox2 usage to TerminalBuffer.zig &
keyboard.zig

Signed-off-by: AnErrupTion <anerruption@disroot.org>

src/animations/ColorMix.zig

@@ -1,9 +1,9 @@
 const std = @import("std");
 const math = std.math;
 
-const Animation = @import("../tui/Animation.zig");
 const Cell = @import("../tui/Cell.zig");
 const TerminalBuffer = @import("../tui/TerminalBuffer.zig");
+const Widget = @import("../tui/Widget.zig");
 
 const ColorMix = @This();
 
@@ -45,14 +45,17 @@ pub fn init(terminal_buffer: *TerminalBuffer, col1: u32, col2: u32, col3: u32) C
     };
 }
 
-pub fn animation(self: *ColorMix) Animation {
-    return Animation.init(self, deinit, realloc, draw);
+pub fn widget(self: *ColorMix) Widget {
+    return Widget.init(
+        self,
+        null,
+        null,
+        draw,
+        null,
+        null,
+    );
 }
 
-fn deinit(_: *ColorMix) void {}
-
-fn realloc(_: *ColorMix) anyerror!void {}
-
 fn draw(self: *ColorMix) void {
     self.frames +%= 1;
     const time: f32 = @as(f32, @floatFromInt(self.frames)) * time_scale;

src/animations/Doom.zig

@@ -1,9 +1,9 @@
 const std = @import("std");
 const Allocator = std.mem.Allocator;
 
-const Animation = @import("../tui/Animation.zig");
 const Cell = @import("../tui/Cell.zig");
 const TerminalBuffer = @import("../tui/TerminalBuffer.zig");
+const Widget = @import("../tui/Widget.zig");
 
 const Doom = @This();
 
@@ -49,15 +49,22 @@ pub fn init(allocator: Allocator, terminal_buffer: *TerminalBuffer, top_color: u
     };
 }
 
-pub fn animation(self: *Doom) Animation {
-    return Animation.init(self, deinit, realloc, draw);
+pub fn widget(self: *Doom) Widget {
+    return Widget.init(
+        self,
+        deinit,
+        realloc,
+        draw,
+        null,
+        null,
+    );
 }
 
 fn deinit(self: *Doom) void {
     self.allocator.free(self.buffer);
 }
 
-fn realloc(self: *Doom) anyerror!void {
+fn realloc(self: *Doom) !void {
     const buffer = try self.allocator.realloc(self.buffer, self.terminal_buffer.width * self.terminal_buffer.height);
     initBuffer(buffer, self.terminal_buffer.width);
     self.buffer = buffer;

src/animations/DurFile.zig

@@ -9,11 +9,11 @@ const LogFile = ly_core.LogFile;
 
 const enums = @import("../enums.zig");
 const DurOffsetAlignment = enums.DurOffsetAlignment;
-const Animation = @import("../tui/Animation.zig");
 const Cell = @import("../tui/Cell.zig");
 const TerminalBuffer = @import("../tui/TerminalBuffer.zig");
 const Color = TerminalBuffer.Color;
 const Styling = TerminalBuffer.Styling;
+const Widget = @import("../tui/Widget.zig");
 
 fn read_decompress_file(allocator: Allocator, file_path: []const u8) ![]u8 {
     const file_buffer = std.fs.cwd().openFile(file_path, .{}) catch {
@@ -403,15 +403,22 @@ pub fn init(allocator: Allocator, terminal_buffer: *TerminalBuffer, log_file: *L
     };
 }
 
-pub fn animation(self: *DurFile) Animation {
-    return Animation.init(self, deinit, realloc, draw);
+pub fn widget(self: *DurFile) Widget {
+    return Widget.init(
+        self,
+        deinit,
+        realloc,
+        draw,
+        null,
+        null,
+    );
 }
 
 fn deinit(self: *DurFile) void {
     self.dur_movie.deinit();
 }
 
-fn realloc(self: *DurFile) anyerror!void {
+fn realloc(self: *DurFile) !void {
     // when terminal size changes, we need to recalculate the start_pos and frame_size based on the new size
     self.start_pos = calc_start_position(self.terminal_buffer, &self.dur_movie, self.offset_alignment, self.offset);
     self.frame_size = calc_frame_size(self.terminal_buffer, &self.dur_movie);

src/animations/GameOfLife.zig

@@ -1,9 +1,9 @@
 const std = @import("std");
 const Allocator = std.mem.Allocator;
 
-const Animation = @import("../tui/Animation.zig");
 const Cell = @import("../tui/Cell.zig");
 const TerminalBuffer = @import("../tui/TerminalBuffer.zig");
+const Widget = @import("../tui/Widget.zig");
 
 const GameOfLife = @This();
 
@@ -60,8 +60,15 @@ pub fn init(allocator: Allocator, terminal_buffer: *TerminalBuffer, fg_color: u3
     return game;
 }
 
-pub fn animation(self: *GameOfLife) Animation {
-    return Animation.init(self, deinit, realloc, draw);
+pub fn widget(self: *GameOfLife) Widget {
+    return Widget.init(
+        self,
+        deinit,
+        realloc,
+        draw,
+        null,
+        null,
+    );
 }
 
 fn deinit(self: *GameOfLife) void {
@@ -69,7 +76,7 @@ fn deinit(self: *GameOfLife) void {
     self.allocator.free(self.next_grid);
 }
 
-fn realloc(self: *GameOfLife) anyerror!void {
+fn realloc(self: *GameOfLife) !void {
     const new_width = self.terminal_buffer.width;
     const new_height = self.terminal_buffer.height;
     const new_size = new_width * new_height;

src/animations/Matrix.zig

@@ -2,9 +2,9 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const Random = std.Random;
 
-const Animation = @import("../tui/Animation.zig");
 const Cell = @import("../tui/Cell.zig");
 const TerminalBuffer = @import("../tui/TerminalBuffer.zig");
+const Widget = @import("../tui/Widget.zig");
 
 pub const FRAME_DELAY: usize = 8;
 
@@ -57,8 +57,15 @@ pub fn init(allocator: Allocator, terminal_buffer: *TerminalBuffer, fg: u32, hea
     };
 }
 
-pub fn animation(self: *Matrix) Animation {
-    return Animation.init(self, deinit, realloc, draw);
+pub fn widget(self: *Matrix) Widget {
+    return Widget.init(
+        self,
+        deinit,
+        realloc,
+        draw,
+        null,
+        null,
+    );
 }
 
 fn deinit(self: *Matrix) void {
@@ -66,7 +73,7 @@ fn deinit(self: *Matrix) void {
     self.allocator.free(self.lines);
 }
 
-fn realloc(self: *Matrix) anyerror!void {
+fn realloc(self: *Matrix) !void {
     const dots = try self.allocator.realloc(self.dots, self.terminal_buffer.width * (self.terminal_buffer.height + 1));
     const lines = try self.allocator.realloc(self.lines, self.terminal_buffer.width);