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feat(ui): text-fit, line-height, and ems against the font size an element ends with

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-24 21:51:41 +03:00
parent d163bad406
commit 355201f094
16 changed files with 149 additions and 21 deletions
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21
packages/ludic.ui/draw_content.ludic
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@ -2,21 +2,22 @@
# text-shadow, and a picture
# a text's lines (one, or the wrapped ones), each placed by text-align, the last cut by an ellipsis
function fr_text(n: UiNode) -> void {
let y = n.y + n.pt + n.bt
let lh = ly_line_h(n)
let y = n.y + n.pt + n.bt + (lh - n.rsize * 1.25) / 2.0
let a = n.rfg_a * fr_ga
let sh = fr_text_shadow(n)
if n.lines == null {
var s = n.text
if n.ellipsis { s = ly_ellipsis(s, n.rsize, n.cw - ly_hin(n)) }
fr_line(n, sh, fr_line_x(n, s), y, s, a)
var s = tf_fit(n, n.text)
if n.ellipsis { s = ly_ellipsis(s, tf_size, n.cw - ly_hin(n)) }
fr_line(n, sh, fr_line_x(n, s, tf_size), y, s, a, tf_size)
return
}
for i in 0 .. len(n.lines) { fr_line(n, sh, fr_line_x(n, n.lines[i]), y + float(i) * n.rsize * 1.25, n.lines[i], a) }
for i in 0 .. len(n.lines) { fr_line(n, sh, fr_line_x(n, n.lines[i], n.rsize), y + float(i) * lh, n.lines[i], a, n.rsize) }
}
# one line, over its shadow when it has one
function fr_line(n: UiNode, sh: UiNodeX, x: float, y: float, s: string, a: float) -> void {
if sh != null { ui_be.text(x + sh.tsh_x, y + sh.tsh_y, s, n.rsize, sh.tsh_c, sh.tsh_a * fr_ga) }
ui_be.text(x, y, s, n.rsize, n.rfg, a)
function fr_line(n: UiNode, sh: UiNodeX, x: float, y: float, s: string, a: float, size: float) -> void {
if sh != null { ui_be.text(x + sh.tsh_x, y + sh.tsh_y, s, size, sh.tsh_c, sh.tsh_a * fr_ga) }
ui_be.text(x, y, s, size, n.rfg, a)
}
# text-shadow is inherited: the nearest element that says it, or null (none)
function fr_text_shadow(n: UiNode) -> UiNodeX {
@ -33,10 +34,10 @@ function fr_text_shadow(n: UiNode) -> UiNodeX {
# the opacity a native's draw is at: every group opacity around it, its own included
export function ui_opacity() -> float { return fr_ga }
# where a line starts: text-align within the room the box gives it
function fr_line_x(n: UiNode, s: string) -> float {
function fr_line_x(n: UiNode, s: string, size: float) -> float {
let x = n.x + n.pl + n.bl
if n.talign == UI_START { return x }
let spare = n.cw - ly_hin(n) - ly_text_w(s, n.rsize)
let spare = n.cw - ly_hin(n) - ly_text_w(s, size)
if n.talign == UI_CENTER { return x + spare / 2.0 }
return x + spare
}