From e2f2e8f25e1b4507d502bea3900031c16eb6a52d Mon Sep 17 00:00:00 2001
From: Jose Colon Rodriguez
Date: Sun, 18 Feb 2024 13:28:09 -0400
Subject: Added cjk build option to set ambiguous width to 2 at build time

---
 build.zig       | 7 +++++++
 codegen/dwp.zig | 7 ++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/build.zig b/build.zig
index 68e01e3..2895d49 100644
--- a/build.zig
+++ b/build.zig
@@ -8,6 +8,7 @@ pub fn build(b: *std.Build) void {
     const ziglyph = b.dependency("ziglyph", .{});
 
     // Code generation
+    // Grapheme break
     const gbp_gen_exe = b.addExecutable(.{
         .name = "gbp",
         .root_source_file = .{ .path = "codegen/gbp.zig" },
@@ -17,12 +18,18 @@ pub fn build(b: *std.Build) void {
     const run_gbp_gen_exe = b.addRunArtifact(gbp_gen_exe);
     const gbp_gen_out = run_gbp_gen_exe.addOutputFileArg("gbp.zig");
 
+    // Display width
+    const cjk = b.option(bool, "cjk", "Ambiguouse code points are wide (display width: 2).") orelse false;
+    const options = b.addOptions();
+    options.addOption(bool, "cjk", cjk);
+
     const dwp_gen_exe = b.addExecutable(.{
         .name = "dwp",
         .root_source_file = .{ .path = "codegen/dwp.zig" },
         .target = b.host,
         .optimize = .Debug,
     });
+    dwp_gen_exe.root_module.addOptions("options", options);
     const run_dwp_gen_exe = b.addRunArtifact(dwp_gen_exe);
     const dwp_gen_out = run_dwp_gen_exe.addOutputFileArg("dwp.zig");
 
diff --git a/codegen/dwp.zig b/codegen/dwp.zig
index a8cef57..36ab7cb 100644
--- a/codegen/dwp.zig
+++ b/codegen/dwp.zig
@@ -1,5 +1,7 @@
 const std = @import("std");
 
+const options = @import("options");
+
 const block_size = 256;
 const Block = [block_size]i3;
 
@@ -75,7 +77,10 @@ pub fn main() !void {
                 },
                 1 => {
                     // Width
-                    if (std.mem.eql(u8, field, "W") or std.mem.eql(u8, field, "F")) {
+                    if (std.mem.eql(u8, field, "W") or
+                        std.mem.eql(u8, field, "F") or
+                        (options.cjk and std.mem.eql(u8, field, "A")))
+                    {
                         for (current_code[0]..current_code[1] + 1) |cp| try flat_map.put(@intCast(cp), 2);
                     }
                 },
-- 
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