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do not use xor to combine keys since when more than two layers deep this would result in identical keys

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This commit is contained in:
Alessandro Mauri 2024-12-20 20:17:53 +01:00
parent a0c6a3b2cb
commit 04843fe714
1 changed files with 5 additions and 2 deletions
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7
src/ugui_core.c3
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@ -182,10 +182,13 @@ fn Elem*! Ctx.get_parent(&ctx)
return ctx.cache.search(parent_id); return ctx.cache.search(parent_id);
} }
// generate an id combining the hashes of the parent id and the label
// with the Cantor pairing function
macro Id! Ctx.gen_id(&ctx, String label) macro Id! Ctx.gen_id(&ctx, String label)
{ {
Id parent_id = ctx.tree.get(ctx.active_div)!; Id a = ctx.tree.get(ctx.active_div)!;
return parent_id ^ label.hash(); Id b = label.hash();
return (a + b) * (a + b + 1) / 2 + a;
} }
// get or push an element from the cache, return a pointer to it // get or push an element from the cache, return a pointer to it