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feat(ui): a popover's align along its side, and within= for the bounds it flips against

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-24 21:48:58 +03:00
parent 0aad2294ec
commit d163bad406
10 changed files with 101 additions and 12 deletions
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39
packages/ludic.ui/popover_within.ludic Normal file
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# popover_within.ludic - what an anchored popover is kept inside: the element named by within="id",
# else the nearest scroll box (or overflow box) around it, else the screen; it flips against the same
var pp_bx: float = 0.0
var pp_by: float = 0.0
var pp_bw: float = 0.0
var pp_bh: float = 0.0
function pp_bounds(p: UiNode) -> void {
pp_bx = ly_vp_x
pp_by = ly_vp_y
pp_bw = ly_vp_w
pp_bh = ly_vp_h
var box: UiNode = null
let id = ui_attr_text(p, "within")
if id != "" {
var at = p.parent
while at != null and box == null {
box = pp_by_id(at, id, p)
at = at.parent
}
if box == null { ui_err(`within="{id}": no element has that id`) }
} else {
var at = p.parent
while at != null and box == null {
if at.kind == UI_SCROLL { box = at }
at = at.parent
}
}
if box == null { return }
pp_bx = box.x
pp_by = box.y
pp_bw = box.cw
pp_bh = box.ch
}
# where a popover of `size` starts along its anchor's side: level with its start, centred, or its end
function pp_along(align: string, at: float, span: float, size: float) -> float {
if align == "center" { return at + (span - size) / 2.0 }
if align == "end" { return at + span - size }
return at
}