From 219b8cd00a3dcd1bd3bba994b97fd079ee183bed Mon Sep 17 00:00:00 2001
From: CJ van den Berg <cj@vdbonline.com>
Date: Wed, 17 Sep 2025 22:42:25 +0200
Subject: [PATCH] feat: support byte offsets in file links

This adds support for a 'b' prefix to the first file link argument
to denote a byte offset.

`{path/to/file.ext}:b{offset}`
---
 src/file_link.zig | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/file_link.zig b/src/file_link.zig
index ec53f39..cc3b817 100644
--- a/src/file_link.zig
+++ b/src/file_link.zig
@@ -13,6 +13,7 @@ pub const FileDest = struct {
     column: ?usize = null,
     end_column: ?usize = null,
     exists: bool = false,
+    offset: ?usize = null,
 };
 
 pub const DirDest = struct {
@@ -37,11 +38,17 @@ pub fn parse(link: []const u8) error{InvalidFileLink}!Dest {
         .{ .file = .{ .path = it.first() } };
     switch (dest) {
         .file => |*file| {
-            if (it.next()) |line_|
+            if (it.next()) |line_| if (line_.len > 0 and line_[0] == 'b') {
+                file.offset = std.fmt.parseInt(usize, line_[1..], 10) catch blk: {
+                    file.path = link;
+                    break :blk null;
+                };
+            } else {
                 file.line = std.fmt.parseInt(usize, line_, 10) catch blk: {
                     file.path = link;
                     break :blk null;
                 };
+            };
             if (file.line) |_| if (it.next()) |col_| {
                 file.column = std.fmt.parseInt(usize, col_, 10) catch null;
             };
@@ -88,6 +95,9 @@ pub fn parse_bracket_link(link: []const u8) error{InvalidFileLink}!Dest {
 pub fn navigate(to: tp.pid_ref, link: *const Dest) anyerror!void {
     switch (link.*) {
         .file => |file| {
+            if (file.offset) |offset| {
+                return to.send(.{ "cmd", "navigate", .{ .file = file.path, .offset = offset } });
+            }
             if (file.line) |l| {
                 if (file.column) |col| {
                     try to.send(.{ "cmd", "navigate", .{ .file = file.path, .line = l, .column = col } });