nx_browser_forms_paint.nx source

1// nx_browser_forms_paint.nx -- RENDER layer for the Nishi-browser form fields: draw a <input>/<textarea> 2// as a bordered box with its current value + a caret when focused (password fields masked). Composes the 3// shipped paint primitives (nx_paint_solid_rect + nx_paint_text) over the pure field state from 4// nx_browser_forms. The browser calls this in a post-layout OVERLAY pass (one call per field, with the 5// field's layout rect) -- decoupled from the CSS engine (which has no <input> styling). Pure framebuffer 6// so it is pixel-gate-provable (nx_browser_forms_render_gate). license_tier: ORIGINAL 7import "nx_browser_forms.nx" 8import "nx_paint_solid_rect.nx" 9import "nx_paint_text.nx" 10 11func bfp_col(c: *CssColor, r: i64, g: i64, b: i64, a: i64) -> i64 { c.r = r; c.g = g; c.b = b; c.a = a; return 0 } 12 13// draw field `fld` as a box at (x,y,w,h). focused=1 -> blue border + caret; else gray border. Returns 0. 14func bf_paint_field(fb: *Framebuffer, x: i64, y: i64, w: i64, h: i64, fld: *BrField, focused: i64) -> i64 { 15 // white field background 16 let bg: *CssColor = sys_mmap(NX_CSS_COLOR_BYTES) as *CssColor 17 bfp_col(bg, 255, 255, 255, 255) 18 nx_paint_solid_rect(fb, x, y, w, h, bg) 19 // border (1px), blue if focused else gray 20 let bc: *CssColor = sys_mmap(NX_CSS_COLOR_BYTES) as *CssColor 21 if focused == 1 { bfp_col(bc, 37, 99, 235, 255) } else { bfp_col(bc, 176, 176, 184, 255) } 22 nx_paint_solid_rect(fb, x, y, w, 1, bc) 23 let yb: i64 = y + h - 1 24 nx_paint_solid_rect(fb, x, yb, w, 1, bc) 25 nx_paint_solid_rect(fb, x, y, 1, h, bc) 26 let xr: i64 = x + w - 1 27 nx_paint_solid_rect(fb, xr, y, 1, h, bc) 28 // value text (mask password with '*'); left pad 5, top pad 4 29 let tx: i64 = x + 5 30 let ty: i64 = y + 4 31 let tc: *CssColor = sys_mmap(NX_CSS_COLOR_BYTES) as *CssColor 32 bfp_col(tc, 28, 28, 30, 255) 33 let vis: i64 = fld.val_len 34 if fld.kind == BF_K_PASSWORD { 35 // masked bullets (font-independent): one small filled dot per char (the '••••' look) 36 var d: i64 = 0 37 while d < vis { 38 let dx: i64 = tx + d * NX_PAINT_TEXT_CELL_W 39 nx_paint_solid_rect(fb, dx, ty + 2, 3, 3, tc) 40 d = d + 1 41 } 42 } else { 43 let disp: *u8 = sys_mmap(vis + 8) 44 var i: i64 = 0 45 while i < vis { disp[i] = fld.val[i]; i = i + 1 } 46 if vis > 0 { nx_paint_text(fb, tx, ty, disp, vis, tc) } 47 } 48 // caret after the value when focused (cell width = NX_PAINT_TEXT_CELL_W) 49 if focused == 1 { 50 let caret_x: i64 = tx + vis * NX_PAINT_TEXT_CELL_W 51 let cc: *CssColor = sys_mmap(NX_CSS_COLOR_BYTES) as *CssColor 52 bfp_col(cc, 28, 28, 30, 255) 53 var ch: i64 = h - 6 54 if ch < 4 { ch = 4 } 55 nx_paint_solid_rect(fb, caret_x, y + 3, 1, ch, cc) 56 } 57 return 0 58} 59 60func main() -> i64 { return 0 }