code wiki / _hdl_build / nx_lineheight_gate.nx
nx_lineheight_gate.nx
buildroot/runtime/_hdl_build/nx_lineheight_gate.nx
about
nx_lineheight_gate.nx -- PROOF (re-runnable) of CSS line-height (the S21 height-axis remainder):
unitless multiplier, px form, the `font` shorthand's /N part, inheritance-with-recompute, and
layout==paint resolver parity -- all through the REAL br_layout on inline fixtures.
T1 line-height:2 @fs16 -> single-line text box h == 32 (control: 17)
T2 font:15px/1.55 ... -> text box h == 23 (15*1550/1000, integer)
T3 line-height:30px -> h == 30 (fixed px, fs-independent)
T4 inherit+recompute -> body{line-height:1.5} p{font-size:20px} -> p line h == 30 (1.5x20, NOT 24)
T5 paint parity -> br_comp_lineheight_px == the layout-observed height on T2's page
T6 CAN-FAIL control -> no decl -> h == 17 (legacy exact; T1's delta is load-bearing)
license_tier: ORIGINAL expect_exit: 0
dependencies 2 imports · 0 importers
imports: nx_syscalls.nxnx_browser_render.nx
imported by: nobody (leaf or entry point)
call flow from main pre-order; caps 40 nodes / depth 6 declared; ↻ = already shown
structs
| none |
consts
| none |
functions
| 14 | func lg_w(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 } |
| 15 | func lg_n(v: i64) -> i64 { let t: *u8=sys_mmap(24); var m: i64=v; if m<0{sys_write(1,"-" as *u8,1);m=0-m} var k: i64=0; if m==0{t[0]=48 as u8;k=1} while m>0{t[k]=(48+(m%10)) as u8;m=m/10;k=k+1} let b: *u8=sys_mmap(24); var j: i64=0; while j<k{b[j]=t[k-1-j];j=j+1} sys_write(1,b,k); return 0 } |
| 16 | func lg_slen(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} return n } |
| 17 | func lg_box(t: *LayoutTree, i: i64) -> *LayoutBox called by 1: lg_find |
| 20 | func lg_has(src: *u8, off: i64, len: i64, m: *u8) -> i64 |
| 33 | func lg_layout(html: *u8) -> *Page |
| 41 | func lg_find(page: *Page, marker: *u8) -> *LayoutBox |
| 52 | func main() -> i64 |