Files
rust_browser/tests/goldens/expected/139-font-family-monospace.layout.txt
Zachary D. Rowitsch 20e241bd03
All checks were successful
ci / fast (linux) (push) Successful in 6m52s
Implement margin collapsing through empty elements (CSS 2.1 §8.3.1)
Self-collapsing elements (zero height, no padding/border, no BFC, no line
boxes) now have their top and bottom margins collapse together, and child
margins propagate through parents with auto height and no bottom
padding/border. This replaces the pairwise collapse_margins() function
with a MarginSet accumulator that tracks max positive and min negative
margins separately, correctly resolving chains of 4+ margins.

Key changes:
- Add is_self_collapsing() post-layout predicate and gather_all_margins()
- Add gather_margin_bottom() for bottom margin propagation with a guard
  against propagation when max-height constrains the parent
- Replace prev_margin_bottom with MarginSet-based pending_margins in the
  sibling layout loop
- Handle clearance + self-collapsing interaction correctly

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-01 01:04:53 -05:00

80 lines
3.3 KiB
Plaintext

LayoutBox node=#1 tag=html box=block
content: (0, 0, 800, 180.8)
padding: 0 0 0 0
border: 0 0 0 0
margin: 0 0 0 0
LayoutBox node=#2 tag=body box=block
content: (8, 8, 784, 156.8)
padding: 0 0 0 0
border: 0 0 0 0
margin: 8 8 8 8
LayoutBox node=#4 tag=p box=block
content: (8, 24, 784, 19.2)
padding: 0 0 0 0
border: 0 0 0 0
margin: 16 0 16 0
inline_context: 1 lines, height=19.2, max_width=119.82379
line[0]: rect=(8, 24, 119.82379, 19.2) fragments=4
frag[0]: rect=(8, 25.6, 28.193832, 16) text="Code" start=true end=false
frag[1]: rect=(43.24229, 25.6, 21.145374, 16) text="via" start=false end=false
frag[2]: rect=(71.43613, 25.6, 28.193832, 16) text="code" start=false end=false
frag[3]: rect=(106.67842, 25.6, 21.145374, 16) text="tag" start=false end=true
LayoutBox node=#5 tag=code box=inline
content: (0, 0, 0, 0)
padding: 0 0 0 0
border: 0 0 0 0
margin: 0 0 0 0
LayoutBox node=#6 tag=anonymous box=anon
content: (0, 0, 119.82381, 16)
padding: 0 0 0 0
border: 0 0 0 0
margin: 0 0 0 0
text: "Code via code tag"
LayoutBox node=#8 tag=pre box=block
content: (8, 59.2, 784, 19.2)
padding: 0 0 0 0
border: 0 0 0 0
margin: 0 0 0 0
inline_context: 1 lines, height=19.2, max_width=119.82379
line[0]: rect=(8, 59.2, 119.82379, 19.2) fragments=2
frag[0]: rect=(8, 60.800003, 84.5815, 16) text="Preformatted" start=false end=false
frag[1]: rect=(99.62996, 60.800003, 28.193832, 16) text="text" start=false end=false
LayoutBox node=#9 tag=anonymous box=anon
content: (0, 0, 119.82381, 16)
padding: 0 0 0 0
border: 0 0 0 0
margin: 0 0 0 0
text: "Preformatted text"
LayoutBox node=#11 tag=p box=block
content: (8, 94.4, 784, 19.200005)
padding: 0 0 0 0
border: 0 0 0 0
margin: 16 0 16 0
inline_context: 1 lines, height=19.200005, max_width=119.82379
line[0]: rect=(8, 94.4, 119.82379, 19.2) fragments=3
frag[0]: rect=(8, 96, 63.436123, 16) text="Monospace" start=false end=false
frag[1]: rect=(78.48459, 96, 21.145374, 16) text="via" start=false end=false
frag[2]: rect=(106.67842, 96, 21.145374, 16) text="CSS" start=false end=false
LayoutBox node=#12 tag=anonymous box=anon
content: (0, 0, 119.82381, 16)
padding: 0 0 0 0
border: 0 0 0 0
margin: 0 0 0 0
text: "Monospace via CSS"
LayoutBox node=#14 tag=p box=block
content: (8, 129.6, 784, 19.199997)
padding: 0 0 0 0
border: 0 0 0 0
margin: 16 0 16 0
inline_context: 1 lines, height=19.199997, max_width=120.85756
line[0]: rect=(8, 129.6, 120.85756, 19.2) fragments=3
frag[0]: rect=(8, 131.20001, 40.36417, 16) text="Default" start=false end=false
frag[1]: rect=(51.418503, 131.20001, 53.06314, 16) text="sans-serif" start=false end=false
frag[2]: rect=(107.53597, 131.20001, 21.321585, 16) text="text" start=false end=false
LayoutBox node=#15 tag=anonymous box=anon
content: (0, 0, 120.85755, 16)
padding: 0 0 0 0
border: 0 0 0 0
margin: 0 0 0 0
text: "Default sans-serif t..."