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refactor: add ascii optimization to Plane.egc_length

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This gives a huge performance boost to pos_to_width which is used by
find results and many other things.
This commit is contained in:
CJ van den Berg 2026-02-02 21:35:57 +01:00
parent 152eed7847
commit e37c17452f
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
1 changed files with 23 additions and 23 deletions
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46
src/renderer/vaxis/Plane.zig
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@ -437,35 +437,35 @@ inline fn set_font_style(style: *vaxis.Cell.Style, fs: FontStyle) void {
} }
} }
inline fn is_control_code(c: u8) bool {
return switch (c) {
0...8, 10...31 => true,
else => false,
};
}
pub fn egc_length(self: *const Plane, egcs: []const u8, colcount: *usize, abs_col: usize, tab_width: usize) usize { pub fn egc_length(self: *const Plane, egcs: []const u8, colcount: *usize, abs_col: usize, tab_width: usize) usize {
if (egcs.len == 0) { if (egcs.len == 0) {
colcount.* = 0; colcount.* = 0;
return 0; return 0;
} }
if (is_control_code(egcs[0])) { switch (egcs[0]) {
colcount.* = 1; 0...8,
return 1; 10...31, //control codes
32...126,
=> { //ascii
colcount.* = 1;
return 1;
},
'\t' => {
colcount.* = tab_width - (abs_col % tab_width);
return 1;
},
else => {
var iter = vaxis.unicode.graphemeIterator(egcs);
const grapheme = iter.next() orelse {
colcount.* = 1;
return 1;
};
const s = grapheme.bytes(egcs);
const w = self.window.gwidth(s);
colcount.* = w;
return s.len;
},
} }
if (egcs[0] == '\t') {
colcount.* = tab_width - (abs_col % tab_width);
return 1;
}
var iter = vaxis.unicode.graphemeIterator(egcs);
const grapheme = iter.next() orelse {
colcount.* = 1;
return 1;
};
const s = grapheme.bytes(egcs);
const w = self.window.gwidth(s);
colcount.* = w;
return s.len;
} }
pub fn egc_chunk_width(self: *const Plane, chunk_: []const u8, abs_col_: usize, tab_width: usize) usize { pub fn egc_chunk_width(self: *const Plane, chunk_: []const u8, abs_col_: usize, tab_width: usize) usize {