From b77c6302ac5351e00537d74a912573a361376056 Mon Sep 17 00:00:00 2001
From: Louis Pearson <opensource@louispearson.work>
Date: Tue, 16 Jan 2024 20:39:35 -0700
Subject: [PATCH] Add xkb-common

---
 .gitmodules                    |  2 ++
 build.zig                      |  7 +++++++
 deps/zig-xkbcommon             |  1 +
 examples/01_client_connect.zig | 38 ++++++++++++++++++++++++++++++++++
 src/main.zig                   | 22 ++++++++++++++++++++
 5 files changed, 70 insertions(+)
 create mode 100644 .gitmodules
 create mode 160000 deps/zig-xkbcommon

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..1b17242
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,2 @@
+[submodule "https://codeberg.org/ifreund/zig-xkbcommon"]
+	url = deps/zig-xkbcommon/
diff --git a/build.zig b/build.zig
index 3218d4d..f8a1057 100644
--- a/build.zig
+++ b/build.zig
@@ -4,6 +4,10 @@ pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
+    const xkbcommon_module = b.createModule(.{
+        .root_source_file = .{ .path = "deps/zig-xkbcommon/src/xkbcommon.zig" },
+    });
+
     const module = b.addModule("wayland", .{
         .root_source_file = .{ .path = "src/main.zig" },
     });
@@ -42,5 +46,8 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
     client_connect_exe.root_module.addImport("wayland", module);
+    client_connect_exe.root_module.addImport("xkbcommon", xkbcommon_module);
+    client_connect_exe.linkLibC();
+    client_connect_exe.linkSystemLibrary("xkbcommon");
     b.installArtifact(client_connect_exe);
 }
diff --git a/deps/zig-xkbcommon b/deps/zig-xkbcommon
new file mode 160000
index 0000000..7b188de
--- /dev/null
+++ b/deps/zig-xkbcommon
@@ -0,0 +1 @@
+Subproject commit 7b188de0ba794b52eb70340abf2469b858630816
diff --git a/examples/01_client_connect.zig b/examples/01_client_connect.zig
index b347fdb..ed85632 100644
--- a/examples/01_client_connect.zig
+++ b/examples/01_client_connect.zig
@@ -1,5 +1,6 @@
 const std = @import("std");
 const wayland = @import("wayland");
+const xkbcommon = @import("xkbcommon");
 
 pub fn main() !void {
     var general_allocator = std.heap.GeneralPurposeAllocator(.{}){};
@@ -258,6 +259,17 @@ pub fn main() !void {
     );
 
     var window_size: [2]u32 = [2]u32{ @intCast(framebuffer_size[0]), @intCast(framebuffer_size[1]) };
+    const xkb_ctx = xkbcommon.Context.new(.no_flags) orelse return error.XKBInit;
+    defer xkb_ctx.unref();
+
+    var xkb_keymap_opt: ?*xkbcommon.Keymap = null;
+    defer if (xkb_keymap_opt) |xkb_keymap| {
+        xkb_keymap.unref();
+    };
+    var xkb_state_opt: ?*xkbcommon.State = null;
+    defer if (xkb_state_opt) |xkb_state| {
+        xkb_state.unref();
+    };
 
     var running = true;
     while (running) {
@@ -379,6 +391,32 @@ pub fn main() !void {
                         keymap.size,
                         fd,
                     });
+                    const mem = try std.os.mmap(
+                        null,
+                        keymap.size,
+                        std.os.PROT.READ,
+                        std.os.MAP.PRIVATE,
+                        fd,
+                        0,
+                    );
+                    std.debug.print("---START xkb file---\n{s}\n---END xkb file---\n", .{mem});
+                    xkb_keymap_opt = xkbcommon.Keymap.newFromString(xkb_ctx, @ptrCast(mem), .text_v1, .no_flags) orelse return error.XKBKeymap;
+                    xkb_state_opt = xkbcommon.State.new(xkb_keymap_opt.?) orelse return error.XKBStateInit;
+                },
+                .key => |key| {
+                    if (xkb_state_opt) |xkb_state| {
+                        const keycode: xkbcommon.Keycode = key.key + 8;
+                        const keysym: xkbcommon.Keysym = xkb_state.keyGetOneSym(keycode);
+                        var buf: [64]u8 = undefined;
+                        const name_len = keysym.getName(&buf, buf.len);
+                        std.debug.print("{s}\n", .{buf[0..@intCast(name_len)]});
+
+                        const changed = if (key.state == .pressed)
+                            xkb_state.updateKey(keycode, .down)
+                        else
+                            xkb_state.updateKey(keycode, .up);
+                        _ = changed;
+                    }
                 },
                 else => {
                     std.debug.print("<- wl_keyboard@{}\n", .{event});
diff --git a/src/main.zig b/src/main.zig
index 43e747a..75e869d 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -589,3 +589,25 @@ pub const Conn = struct {
         return .{ header, message };
     }
 };
+
+// pub const XKBKeymap = struct {
+//     keycodes: Keycodes,
+//     types: Types,
+//     compatability: Compatability,
+//     symbols: Symbols,
+//
+//     const Keycodes = struct {
+//         min: usize,
+//         max: usize,
+//         map: std.AutoHashMap(usize, usize),
+//         indicators: std.StringHashMap(usize),
+//     };
+//
+//     const ISOKEY = [4]u8;
+//
+//     const Types = struct {};
+//     const Compatability = struct {};
+//     const Symbols = struct {};
+//
+//     pub fn parse() {}
+// };