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nx_layout_block.nx

buildroot/runtime/nx_layout_block.nx

124638 B2503 linesdepth 6pulls 14 transitivereach 85 importersview sourcekind librarytopic layout
docsdependenciesstructsconstsfunctions

about

nx_layout_block.nx -- normal-flow block layout for the Nishi browser. Phase 3 second primitive of NISHI_BROWSER_ROADMAP. Walks a LayoutBox tree (from nx_layout_box, shipped previously) top-down, queries each box's CssComputedDecl slice (from nx_css_apply, Phase 2) for width / height / margin / padding, and assigns concrete (x, y, w, h) integer pixels. Subset implemented: - BLOCK boxes only (INLINE / INLINE_BLOCK handled by nx_layout_inline, queued) - Normal flow ONLY (no positioned / float / grid / flex) - content-box sizing (CSS default; box-sizing: border-box is Phase 3b queued) - Per-box style queries via nx_css_lookup_property + value decode via nx_css_dimension_to_px - margin-top, margin-bottom, padding-top, padding-bottom (horizontal margin/padding deferred to Phase 3b -- horizontal layout currently sets w = parent.content_w for all blocks) - Explicit width / height declarations consume cascade value; auto height = sum of children heights What it does NOT handle (Phase 3b queued): - margin / padding on left / right axes - margin collapse between adjacent block siblings - border-top / border-bottom contribution to height - width: auto with horizontal centering via margin: auto - min-width / max-width / min-height / max-height - height: percentage of parent (needs parent.h resolved first) - INLINE child layout (inline boxes inside block context) - float / clear - positioned (relative / absolute / fixed / sticky) - overflow / scroll Per cardinal feedback-honest-perf-verdict-no-aspirational-claims: gap list is EXACT. genealogy_id: w3c_css_box_model_module_level_3_normal_flow + substrate_browser_phase_3_block_layout lineage_id: nishi_browser_layout_block_v1

dependencies 11 imports · 26 importers

nx_syscalls.nx nx_text_wrap.nx nx_font8x8.nx nx_font.nx nx_css_tokenize.nx nx_css_parse.nx nx_css_selector_match.nx nx_css_apply.nx nx_css_number_parse.nx nx_css_dimension_to_px.nx nx_layout_block.nx nx_align_gate.nx nx_border_gate.nx nx_browser.nx nx_browser_render.nx nx_flexgrow_gate.nx nx_flexgrow_probe.nx nx_float_gate.nx nx_float_test.nx nx_grid_gate.nx nx_grid_test.nx

diagram shows first 10 each side; +1 more imports, +16 more importers in the complete lists below.

imports: nx_syscalls.nxnx_text_wrap.nxnx_font8x8.nxnx_font.nxnx_css_tokenize.nxnx_css_parse.nxnx_css_selector_match.nxnx_css_apply.nxnx_css_number_parse.nxnx_css_dimension_to_px.nxnx_layout_box.nx

imported by: nx_align_gate.nxnx_border_gate.nxnx_browser.nxnx_browser_render.nxnx_flexgrow_gate.nxnx_flexgrow_probe.nxnx_float_gate.nxnx_float_test.nxnx_grid_gate.nxnx_grid_test.nxnx_grid_track_gate.nxnx_justify_gate.nxnx_layout_block_horizontal_test.nxnx_layout_block_test.nxnx_layout_debug.nxnx_layout_example_com_real_test.nxnx_negmargin_gate.nxnx_real_page_gate.nxnx_render_ascii.nxnx_render_html.nxnx_render_page_gate.nxnx_render_wiki_bmp.nxnx_render_wiki_styled_window.nxnx_render_wiki_window.nxnx_table_cell_gate.nxnx_wiki_boxdump.nx

structs

72struct LayoutCtx
88struct LayoutPropTable
517struct InlinePen

consts

62const NX_MAGIC_100000: i64 = 100000
63const NX_MAGIC_37795: i64 = 37795
64const NX_MAGIC_10000: i64 = 10000
65const NX_MAGIC_65536: i64 = 65536
66const NX_MAGIC_1000000000: i64 = 1000000000
67const NX_MAGIC_4096: i64 = 4096
83const NX_LAYOUT_CTX_BYTES: i64 = 64
112const NX_LAYOUT_PROP_TABLE_BYTES: i64 = 168
360const NX_MARGIN_UNSET: i64 = 1073741824
526const NX_INLINE_PEN_BYTES: i64 = 56
527const NX_INLINE_GLYPH_W: i64 = 9 // matches the live browser's 9x15 X font advance (was 6 = paint_text cell; 6 made 9px text overflow its boxes ~1.5x)
528const NX_INLINE_LINE_H: i64 = 17 // matches the 9x15 font height (15px) + 2px leading; was 10
891const NX_TBL_MAXCOLS: i64 = 64

functions

116func _layout_put_byte(buf: *u8, i: i64, v: i64) -> i64
called by 1: nx_layout_prop_table_init
123func nx_layout_prop_table_init(t: *LayoutPropTable, buf: *u8) -> i64
called by 22: run_layoutbr_layoutbr_layoutrun_layoutrun_layoutrun+16 calls 1: _layout_put_byte
277func _layout_lookup_px(ctx: *LayoutCtx, table_src: *u8,
called by 2: _layout_inline_flow_layout_block_recurse calls 1: nx_css_dimension_to_px
319func _layout_lookup_height_px(ctx: *LayoutCtx, table_src: *u8,
called by 2: _layout_inline_flow_layout_block_recurse calls 1: nx_css_dimension_to_px
365func _layout_margin_px(ctx: *LayoutCtx, table_src: *u8, box_idx: i64, prop_off: i64, prop_len: i64) -> i64
calls 1: nx_css_dimension_to_px
399func _layout_boxside_px(ctx: *LayoutCtx, table_src: *u8, box_idx: i64, lh_off: i64, lh_len: i64, pname: *u8, pnlen: i64, side: i64, miss: i64) -> i64
called by 2: _layout_inline_flow_layout_block_recurse calls 4: nx_css_dimension_to_pxsys_mmapnx_css_number_parse_layout_fontsize_inherited
548func _lb_lc(b: i64) -> i64 { if b >= 65 { if b <= 90 { return b + 32 } } return b }
called by 1: nx_fontsize_value_px
549func nx_fontsize_value_px(src: *u8, voff: i64, vlen: i64, uoff: i64, ulen: i64, pct_out: *i64) -> i64
called by 2: br_comp_fontsize_own_layout_fontsize_decl_px calls 1: _lb_lc
617func _layout_fontsize_decl_px(ctx: *LayoutCtx, element_idx: i64, pct_out: *i64) -> i64
called by 1: _layout_fontsize_inherited calls 1: nx_fontsize_value_px
671func _layout_fontsize_inherited(ctx: *LayoutCtx, box_idx: i64) -> i64
called by 4: _layout_boxside_px_layout_fontsize_inherited_layout_intrinsic_w_layout_inline_flow calls 3: sys_mmap_layout_fontsize_decl_px_layout_fontsize_inherited
699func _layout_scale_for_px(px: i64) -> i64
called by 2: _layout_intrinsic_w_layout_inline_flow
708func _layout_display_none(ctx: *LayoutCtx, box_idx: i64) -> i64
called by 2: _layout_inline_flow_layout_block_recurse
734func _il_text_w(b: *LayoutBox, avail_w: i64) -> i64
749func _layout_lineheight_decl_px(ctx: *LayoutCtx, element_idx: i64, fs: i64) -> i64
called by 1: _layout_lineheight_px calls 1: nx_css_number_parse
851func _layout_lineheight_px(ctx: *LayoutCtx, box_idx: i64, fs: i64) -> i64
called by 1: _layout_inline_flow calls 1: _layout_lineheight_decl_px
871func nx_layout_set_vec_measure(v: i64) -> i64 { l_vec_measure = v; return 0 }
called by 3: gv_layoutmainmain
875func nx_layout_set_ytrap(v: i64) -> i64 { l_ytrap = v; return 0 }
876func _yt_w(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(2,s,n); return 0 }
called by 4: _yt_n_layout_inline_flow_layout_shift_subtree_layout_block_recurse calls 1: sys_write
877func _yt_n(v: i64) -> i64 { let b: *u8=sys_mmap(28); var m: i64=v; if m<0{_yt_w("-" as *u8);m=0-m} let t: *u8=sys_mmap(28); 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} var i: i64=0; while i<k{b[i]=t[k-1-i];i=i+1} sys_write(2,b,k); return 0 }
called by 3: _layout_inline_flow_layout_shift_subtree_layout_block_recurse calls 3: sys_mmap_yt_wsys_write
895func _layout_vec_text_w(t: *u8, start: i64, end: i64, fs: i64) -> i64
called by 2: _layout_intrinsic_w_layout_inline_flow calls 1: font_adv_em
903func _il_prop_is(src: *u8, off: i64, name: *u8, n: i64) -> i64
called by 1: _layout_border_w
912func _layout_border_w(ctx: *LayoutCtx, box_idx: i64) -> i64
called by 1: _layout_inline_flow calls 2: _il_prop_is_grid_int_val
934func _layout_intrinsic_w(ctx: *LayoutCtx, box_idx: i64) -> i64
called by 4: _layout_intrinsic_w_layout_inline_flow_layout_table_cols_layout_block_recurse calls 7: _layout_fontsize_inherited_layout_scale_for_pxfont8x8_tablefont8x8_text_wfont_run_has_ext_layout_vec_text_w+1
968func _layout_inline_flow(ctx: *LayoutCtx, pen: *InlinePen, box_idx: i64) -> i64
called by 2: _layout_inline_flow_layout_block_recurse calls 19: _layout_display_none_layout_fontsize_inherited_layout_scale_for_px_layout_lineheight_pxfont8x8_tablefont8x8_text_w+13
1199func _layout_display_flex(ctx: *LayoutCtx, box_idx: i64) -> i64
1229func _lb_margin_auto(ctx: *LayoutCtx, box_idx: i64, side: i64) -> i64
1290func _layout_has_grid_areas(ctx: *LayoutCtx, box_idx: i64) -> i64
1312func _layout_flex_dir_col(ctx: *LayoutCtx, box_idx: i64) -> i64
1332func _layout_display_grid(ctx: *LayoutCtx, box_idx: i64) -> i64
1359func _layout_display_table(ctx: *LayoutCtx, box_idx: i64) -> i64
1384func _lb_box(ctx: *LayoutCtx, i: i64) -> *LayoutBox
called by 2: _layout_table_cols_layout_block_recurse calls 2: _layout_display_table_lb_box
1387func _layout_nearest_table(ctx: *LayoutCtx, idx: i64) -> i64
1405func _layout_table_cols(ctx: *LayoutCtx, tbl_idx: i64, avail_w: i64, colw: *i64) -> i64
1485func _grid_int_val(src: *u8, voff: i64, vlen: i64) -> i64
1500func _grid_prop_px(ctx: *LayoutCtx, box_idx: i64, name: *u8, nlen: i64) -> i64
1518func _grid_gap(ctx: *LayoutCtx, box_idx: i64, want_row: i64) -> i64
1531func _layout_grid_template(ctx: *LayoutCtx, box_idx: i64, ooff: *i64, olen: *i64) -> i64
1572func _grid_parse_size(src: *u8, ts: i64, te: i64, fr_out: *i64) -> i64
1622func _grid_resolve_tracks(src: *u8, voff: i64, vlen: i64, avail: i64, col_gap: i64, widths: *i64, maxcols: i64) -> i64
1733func _layout_float(ctx: *LayoutCtx, box_idx: i64) -> i64
1765func _layout_position(ctx: *LayoutCtx, box_idx: i64) -> i64
1798func _layout_justify(ctx: *LayoutCtx, box_idx: i64) -> i64
1828func _layout_align(ctx: *LayoutCtx, box_idx: i64) -> i64
1856func _layout_flex_grow(ctx: *LayoutCtx, box_idx: i64) -> i64
1904func _layout_shift_subtree(ctx: *LayoutCtx, box_idx: i64, dy: i64) -> i64
1929func _layout_block_recurse(ctx: *LayoutCtx, table: *LayoutPropTable,
2481func nx_layout_block_layout(ctx: *LayoutCtx, table: *LayoutPropTable,
2490func nx_layout_ctx_init(ctx: *LayoutCtx, tree: *LayoutTree,