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fix: simplify and update Buffer.get_byte_pos for zig-0.15

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CJ van den Berg 2025-09-26 21:04:42 +02:00
parent 2867fc9a8e
commit 8f1375745d
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
1 changed files with 24 additions and 43 deletions
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67
src/buffer/Buffer.zig
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@ -1039,53 +1039,34 @@ const Node = union(enum) {
};
}
pub fn get_byte_pos(self: *const Node, pos_: Cursor, metrics_: Metrics, eol_mode: EolMode) !usize {
const Ctx = struct {
pub fn get_byte_pos(self: *const Node, pos_: Cursor, metrics: Metrics, eol_mode: EolMode) !usize {
const ctx_ = struct {
pos: usize = 0,
line: usize = 0,
abs_col: usize = 0,
pos: Cursor,
byte_pos: usize = 0,
metrics: Metrics,
const Ctx = @This();
const Writer = std.io.Writer(*Ctx, error{Stop}, write);
fn write(ctx: *Ctx, bytes: []const u8) error{Stop}!usize {
if (ctx.line >= ctx.pos.row) {
return ctx.get_col_bytes(bytes, bytes.len);
} else for (bytes, 1..) |char, i| {
ctx.byte_pos += 1;
if (char == '\n') {
ctx.line += 1;
if (ctx.line >= ctx.pos.row)
return ctx.get_col_bytes(bytes[i..], bytes.len);
}
col: usize = 0,
target_line: usize,
target_col: usize,
eol_mode: EolMode,
fn walker(ctx_: *anyopaque, egc: []const u8, wcwidth: usize, _: Metrics) Walker {
const ctx = @as(*@This(), @ptrCast(@alignCast(ctx_)));
if (ctx.line == ctx.target_line and ctx.col == ctx.target_col) return Walker.stop;
if (egc[0] == '\n') {
ctx.pos += switch (ctx.eol_mode) {
.lf => 1,
.crlf => 2,
};
ctx.line += 1;
ctx.col = 0;
} else {
ctx.pos += egc.len;
ctx.col += wcwidth;
}
return bytes.len;
}
fn get_col_bytes(ctx: *Ctx, bytes: []const u8, result: usize) error{Stop}!usize {
var buf: []const u8 = bytes;
while (buf.len > 0) {
if (ctx.abs_col >= ctx.pos.col) return error.Stop;
if (buf[0] == '\n') return error.Stop;
var cols: c_int = undefined;
const egc_bytes = ctx.metrics.egc_length(ctx.metrics, buf, &cols, ctx.abs_col);
ctx.abs_col += @intCast(cols);
ctx.byte_pos += egc_bytes;
buf = buf[egc_bytes..];
}
return result;
}
fn writer(ctx: *Ctx) Writer {
return .{ .context = ctx };
return Walker.keep_walking;
}
};
var ctx: Ctx = .{
.pos = pos_,
.metrics = metrics_,
};
self.store(ctx.writer(), eol_mode) catch |e| switch (e) {
error.Stop => return ctx.byte_pos,
};
return error.NotFound;
var ctx: ctx_ = .{ .target_line = pos_.row, .target_col = pos_.col, .eol_mode = eol_mode };
self.walk_egc_forward(0, ctx_.walker, &ctx, metrics) catch {};
return ctx.pos;
}
pub fn debug_render_chunks(self: *const Node, allocator: std.mem.Allocator, line: usize, metrics_: Metrics) ![]const u8 {