feat(math): implement m:phant phantom converter - #2749

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caio-pizzol merged 4 commits into
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Abdeltoto:feat/math-phantom-converter
Apr 13, 2026
Merged

feat(math): implement m:phant phantom converter#2749
caio-pizzol merged 4 commits into
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Abdeltoto:feat/math-phantom-converter

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@AbdeltotoAbdeltoto commented Apr 8, 2026

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Closes#2608

Summary

  • Implements the m:phant OMML-to-MathML converter (invisible spacing placeholder)
  • Full phantom maps to <mphantom>; partial dimension control maps to <mpadded> with zeroed width/height/depth
  • Supports m:show, m:zeroWid, m:zeroAsc, and m:zeroDesc property flags
  • Registers the converter in MATH_OBJECT_REGISTRY
  • Adds 3 unit tests covering full phantom, visible with zeroed width, and invisible with zeroed height

Spec reference

ECMA-376 Section 22.1.2.81

Test plan

  • vitest run passes for omml-to-mathml.test.ts
  • Linter and formatter pass (lefthook pre-commit)

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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts Outdated
Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts Outdated
@Abdeltoto
Abdeltotoforce-pushed the feat/math-phantom-converter branch from 3e7e2c0 to c6b8cc6CompareApril 8, 2026 03:03
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@Abdeltoto thanks for contributing this! the phantom converter is a nice addition and the code is clean — matches Word perfectly on 7 out of 10 test cases.

one thing to fix: when <m:show> is missing, content renders invisible but should be visible. this affects the most common phantom pattern (zeroing a dimension without explicitly setting show). left an inline comment with a one-line fix, comparison screenshots, and 10 Word-native test files.

Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts Outdated
@caio-pizzolcaio-pizzol self-assigned this Apr 9, 2026
Abdeltotoand others added 4 commits April 13, 2026 16:08
@Abdeltoto@caio-pizzol
feat(math): implement m:phant phantom converter (closessuperdoc#2608)
8cf3e3a
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): parse full ST_OnOff values in phantom converter
4e2d253
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): treat bare m:show element as visible in phantom converter
05f8582
Made-with: Cursor
@caio-pizzol
fix(math): render phantom as visible when m:show is omitted
6b0cb18
Per ECMA-376 §22.1.2.96, when <m:show> is absent from <m:phantPr> the
base content should be shown. The previous check only handled bare and
truthy-val variants, so a missing element was treated as hidden —
breaking the most common phantom pattern (zeroing a dimension without
hiding content).
Adds unit coverage for the explicit-hide case and zeroed-dimension-only
case, plus a behavior test loading a 12-case fixture that walks every
m:phantPr configuration in the spec (show absent/bare/val=0/1/true/false,
each zero flag alone and combined, m:transp passthrough).
@caio-pizzol
caio-pizzolforce-pushed the feat/math-phantom-converter branch from c6b8cc6 to 6b0cb18CompareApril 13, 2026 23:13
@caio-pizzol

caio-pizzol commented Apr 13, 2026

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hey @Abdeltoto — didn't want to block this any longer so I pushed the last fix myself, hope that's cool.

your two fixes from round 1 look great. the one still open was the "no m:show" case — the spec says content should show when m:show isn't there, but the old check was hiding it. one-line change and it matches Word now.

while I was in there I went through every phantom setup the spec describes (12 in total) and they all render right. added a few more unit tests for the gaps, plus a browser test that loads all 12 in one doc. the doc is in our visual test set too, so we'll catch any future breakage.

also rebased on main — a bunch of other math converters landed since you opened this, so there were some conflicts to untangle.

thanks for picking this up, the code is clean. merging once CI's green.

@caio-pizzol
caio-pizzol added this pull request to the merge queue Apr 13, 2026
Merged via the queue into superdoc:main with commit 47f92bcApr 13, 2026
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Math: implement m:phant phantom converter (community)

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
feat(math): implement m:phant phantom converter - #2749
Merged
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Apr 13, 2026
Merged
feat(math): implement m:phant phantom converter#2749
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Conversation
@Abdeltoto
@AbdeltotoAbdeltoto
commented
Apr 8, 2026

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Closes#2608
Summary
  • Implements the m:phant OMML-to-MathML converter (invisible spacing placeholder)
  • Full phantom maps to <mphantom>; partial dimension control maps to <mpadded> with zeroed width/height/depth
  • Supports m:show, m:zeroWid, m:zeroAsc, and m:zeroDesc property flags
  • Registers the converter in MATH_OBJECT_REGISTRY
  • Adds 3 unit tests covering full phantom, visible with zeroed width, and invisible with zeroed height
Spec reference
ECMA-376 Section 22.1.2.81
Test plan
  • vitest run passes for omml-to-mathml.test.ts
  •  Linter and formatter pass (lefthook pre-commit)
chatgpt-codex-connector[bot]
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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@Abdeltoto
Abdeltotoforce-pushed
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feat/math-phantom-converter
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@Abdeltoto thanks for contributing this! the phantom converter is a nice addition and the code is clean — matches Word perfectly on 7 out of 10 test cases.
one thing to fix: when <m:show> is missing, content renders invisible but should be visible. this affects the most common phantom pattern (zeroing a dimension without explicitly setting show). left an inline comment with a one-line fix, comparison screenshots, and 10 Word-native test files.
Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
Outdated

@caio-pizzolcaio-pizzol
self-assigned this
Apr 9, 2026
Abdeltotoand others
added 4 commits
April 13, 2026 16:08
@Abdeltoto@caio-pizzol
feat(math): implement m:phant phantom converter (closessuperdoc#2608)
8cf3e3a
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): parse full ST_OnOff values in phantom converter
4e2d253
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): treat bare m:show element as visible in phantom converter
05f8582
Made-with: Cursor
@caio-pizzol
fix(math): render phantom as visible when m:show is omitted
6b0cb18
Per ECMA-376 §22.1.2.96, when <m:show> is absent from <m:phantPr> the
base content should be shown. The previous check only handled bare and
truthy-val variants, so a missing element was treated as hidden —
breaking the most common phantom pattern (zeroing a dimension without
hiding content).
Adds unit coverage for the explicit-hide case and zeroed-dimension-only
case, plus a behavior test loading a 12-case fixture that walks every
m:phantPr configuration in the spec (show absent/bare/val=0/1/true/false,
each zero flag alone and combined, m:transp passthrough).
@caio-pizzol
caio-pizzolforce-pushed
the
feat/math-phantom-converter
branch
from
c6b8cc6 to
6b0cb18CompareApril 13, 2026 23:13
@caio-pizzol
caio-pizzol
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Apr 13, 2026

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hey @Abdeltoto — didn't want to block this any longer so I pushed the last fix myself, hope that's cool.
your two fixes from round 1 look great. the one still open was the "no m:show" case — the spec says content should show when m:show isn't there, but the old check was hiding it. one-line change and it matches Word now.
while I was in there I went through every phantom setup the spec describes (12 in total) and they all render right. added a few more unit tests for the gaps, plus a browser test that loads all 12 in one doc. the doc is in our visual test set too, so we'll catch any future breakage.
also rebased on main — a bunch of other math converters landed since you opened this, so there were some conflicts to untangle.
thanks for picking this up, the code is clean. merging once CI's green.
@caio-pizzol
caio-pizzol
added this pull request to the merge queue
Apr 13, 2026

Merged
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with commit 47f92bcApr 13, 2026

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(math): implement m:phant phantom converter - #2749
Merged
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Apr 13, 2026
Merged
feat(math): implement m:phant phantom converter#2749
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Conversation
@Abdeltoto
@AbdeltotoAbdeltoto
commented
Apr 8, 2026

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Closes#2608
Summary
  • Implements the m:phant OMML-to-MathML converter (invisible spacing placeholder)
  • Full phantom maps to <mphantom>; partial dimension control maps to <mpadded> with zeroed width/height/depth
  • Supports m:show, m:zeroWid, m:zeroAsc, and m:zeroDesc property flags
  • Registers the converter in MATH_OBJECT_REGISTRY
  • Adds 3 unit tests covering full phantom, visible with zeroed width, and invisible with zeroed height
Spec reference
ECMA-376 Section 22.1.2.81
Test plan
  • vitest run passes for omml-to-mathml.test.ts
  •  Linter and formatter pass (lefthook pre-commit)
chatgpt-codex-connector[bot]
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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@Abdeltoto
Abdeltotoforce-pushed
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@Abdeltoto thanks for contributing this! the phantom converter is a nice addition and the code is clean — matches Word perfectly on 7 out of 10 test cases.
one thing to fix: when <m:show> is missing, content renders invisible but should be visible. this affects the most common phantom pattern (zeroing a dimension without explicitly setting show). left an inline comment with a one-line fix, comparison screenshots, and 10 Word-native test files.
Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
Outdated

@caio-pizzolcaio-pizzol
self-assigned this
Apr 9, 2026
Abdeltotoand others
added 4 commits
April 13, 2026 16:08
@Abdeltoto@caio-pizzol
feat(math): implement m:phant phantom converter (closessuperdoc#2608)
8cf3e3a
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): parse full ST_OnOff values in phantom converter
4e2d253
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): treat bare m:show element as visible in phantom converter
05f8582
Made-with: Cursor
@caio-pizzol
fix(math): render phantom as visible when m:show is omitted
6b0cb18
Per ECMA-376 §22.1.2.96, when <m:show> is absent from <m:phantPr> the
base content should be shown. The previous check only handled bare and
truthy-val variants, so a missing element was treated as hidden —
breaking the most common phantom pattern (zeroing a dimension without
hiding content).
Adds unit coverage for the explicit-hide case and zeroed-dimension-only
case, plus a behavior test loading a 12-case fixture that walks every
m:phantPr configuration in the spec (show absent/bare/val=0/1/true/false,
each zero flag alone and combined, m:transp passthrough).
@caio-pizzol
caio-pizzolforce-pushed
the
feat/math-phantom-converter
branch
from
c6b8cc6 to
6b0cb18CompareApril 13, 2026 23:13
@caio-pizzol
caio-pizzol
commented
Apr 13, 2026

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hey @Abdeltoto — didn't want to block this any longer so I pushed the last fix myself, hope that's cool.
your two fixes from round 1 look great. the one still open was the "no m:show" case — the spec says content should show when m:show isn't there, but the old check was hiding it. one-line change and it matches Word now.
while I was in there I went through every phantom setup the spec describes (12 in total) and they all render right. added a few more unit tests for the gaps, plus a browser test that loads all 12 in one doc. the doc is in our visual test set too, so we'll catch any future breakage.
also rebased on main — a bunch of other math converters landed since you opened this, so there were some conflicts to untangle.
thanks for picking this up, the code is clean. merging once CI's green.
@caio-pizzol
caio-pizzol
added this pull request to the merge queue
Apr 13, 2026

Merged
via the queue into
superdoc:main
with commit 47f92bcApr 13, 2026

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🎉 This PR is included in @superdoc-dev/react v1.2.0-next.8
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🎉 This PR is included in superdoc v1.26.0-next.11
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Math: implement m:phant phantom converter (community)


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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(math): implement m:phant phantom converter - #2749
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Abdeltoto:feat/math-phantom-converter
Apr 13, 2026
Merged
feat(math): implement m:phant phantom converter#2749
caio-pizzol merged 4 commits into
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Abdeltoto:feat/math-phantom-converter
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@Abdeltoto
@AbdeltotoAbdeltoto
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Apr 8, 2026

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Closes#2608
Summary
  • Implements the m:phant OMML-to-MathML converter (invisible spacing placeholder)
  • Full phantom maps to <mphantom>; partial dimension control maps to <mpadded> with zeroed width/height/depth
  • Supports m:show, m:zeroWid, m:zeroAsc, and m:zeroDesc property flags
  • Registers the converter in MATH_OBJECT_REGISTRY
  • Adds 3 unit tests covering full phantom, visible with zeroed width, and invisible with zeroed height
Spec reference
ECMA-376 Section 22.1.2.81
Test plan
  • vitest run passes for omml-to-mathml.test.ts
  •  Linter and formatter pass (lefthook pre-commit)
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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@Abdeltoto
Abdeltotoforce-pushed
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feat/math-phantom-converter
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@Abdeltoto thanks for contributing this! the phantom converter is a nice addition and the code is clean — matches Word perfectly on 7 out of 10 test cases.
one thing to fix: when <m:show> is missing, content renders invisible but should be visible. this affects the most common phantom pattern (zeroing a dimension without explicitly setting show). left an inline comment with a one-line fix, comparison screenshots, and 10 Word-native test files.
Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
Outdated

@caio-pizzolcaio-pizzol
self-assigned this
Apr 9, 2026
Abdeltotoand others
added 4 commits
April 13, 2026 16:08
@Abdeltoto@caio-pizzol
feat(math): implement m:phant phantom converter (closessuperdoc#2608)
8cf3e3a
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): parse full ST_OnOff values in phantom converter
4e2d253
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): treat bare m:show element as visible in phantom converter
05f8582
Made-with: Cursor
@caio-pizzol
fix(math): render phantom as visible when m:show is omitted
6b0cb18
Per ECMA-376 §22.1.2.96, when <m:show> is absent from <m:phantPr> the
base content should be shown. The previous check only handled bare and
truthy-val variants, so a missing element was treated as hidden —
breaking the most common phantom pattern (zeroing a dimension without
hiding content).
Adds unit coverage for the explicit-hide case and zeroed-dimension-only
case, plus a behavior test loading a 12-case fixture that walks every
m:phantPr configuration in the spec (show absent/bare/val=0/1/true/false,
each zero flag alone and combined, m:transp passthrough).
@caio-pizzol
caio-pizzolforce-pushed
the
feat/math-phantom-converter
branch
from
c6b8cc6 to
6b0cb18CompareApril 13, 2026 23:13
@caio-pizzol
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Apr 13, 2026

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hey @Abdeltoto — didn't want to block this any longer so I pushed the last fix myself, hope that's cool.
your two fixes from round 1 look great. the one still open was the "no m:show" case — the spec says content should show when m:show isn't there, but the old check was hiding it. one-line change and it matches Word now.
while I was in there I went through every phantom setup the spec describes (12 in total) and they all render right. added a few more unit tests for the gaps, plus a browser test that loads all 12 in one doc. the doc is in our visual test set too, so we'll catch any future breakage.
also rebased on main — a bunch of other math converters landed since you opened this, so there were some conflicts to untangle.
thanks for picking this up, the code is clean. merging once CI's green.
@caio-pizzol
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Apr 13, 2026

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with commit 47f92bcApr 13, 2026

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Math: implement m:phant phantom converter (community)


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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
feat(math): implement m:phant phantom converter - #2749
Merged
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Apr 13, 2026
Merged
feat(math): implement m:phant phantom converter#2749
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Conversation
@Abdeltoto
@AbdeltotoAbdeltoto
commented
Apr 8, 2026

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Closes#2608
Summary
  • Implements the m:phant OMML-to-MathML converter (invisible spacing placeholder)
  • Full phantom maps to <mphantom>; partial dimension control maps to <mpadded> with zeroed width/height/depth
  • Supports m:show, m:zeroWid, m:zeroAsc, and m:zeroDesc property flags
  • Registers the converter in MATH_OBJECT_REGISTRY
  • Adds 3 unit tests covering full phantom, visible with zeroed width, and invisible with zeroed height
Spec reference
ECMA-376 Section 22.1.2.81
Test plan
  • vitest run passes for omml-to-mathml.test.ts
  •  Linter and formatter pass (lefthook pre-commit)
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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@Abdeltoto
Abdeltotoforce-pushed
the
feat/math-phantom-converter
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from
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@Abdeltoto thanks for contributing this! the phantom converter is a nice addition and the code is clean — matches Word perfectly on 7 out of 10 test cases.
one thing to fix: when <m:show> is missing, content renders invisible but should be visible. this affects the most common phantom pattern (zeroing a dimension without explicitly setting show). left an inline comment with a one-line fix, comparison screenshots, and 10 Word-native test files.
Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
Outdated

@caio-pizzolcaio-pizzol
self-assigned this
Apr 9, 2026
Abdeltotoand others
added 4 commits
April 13, 2026 16:08
@Abdeltoto@caio-pizzol
feat(math): implement m:phant phantom converter (closessuperdoc#2608)
8cf3e3a
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): parse full ST_OnOff values in phantom converter
4e2d253
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): treat bare m:show element as visible in phantom converter
05f8582
Made-with: Cursor
@caio-pizzol
fix(math): render phantom as visible when m:show is omitted
6b0cb18
Per ECMA-376 §22.1.2.96, when <m:show> is absent from <m:phantPr> the
base content should be shown. The previous check only handled bare and
truthy-val variants, so a missing element was treated as hidden —
breaking the most common phantom pattern (zeroing a dimension without
hiding content).
Adds unit coverage for the explicit-hide case and zeroed-dimension-only
case, plus a behavior test loading a 12-case fixture that walks every
m:phantPr configuration in the spec (show absent/bare/val=0/1/true/false,
each zero flag alone and combined, m:transp passthrough).
@caio-pizzol
caio-pizzolforce-pushed
the
feat/math-phantom-converter
branch
from
c6b8cc6 to
6b0cb18CompareApril 13, 2026 23:13
@caio-pizzol
caio-pizzol
commented
Apr 13, 2026

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hey @Abdeltoto — didn't want to block this any longer so I pushed the last fix myself, hope that's cool.
your two fixes from round 1 look great. the one still open was the "no m:show" case — the spec says content should show when m:show isn't there, but the old check was hiding it. one-line change and it matches Word now.
while I was in there I went through every phantom setup the spec describes (12 in total) and they all render right. added a few more unit tests for the gaps, plus a browser test that loads all 12 in one doc. the doc is in our visual test set too, so we'll catch any future breakage.
also rebased on main — a bunch of other math converters landed since you opened this, so there were some conflicts to untangle.
thanks for picking this up, the code is clean. merging once CI's green.
@caio-pizzol
caio-pizzol
added this pull request to the merge queue
Apr 13, 2026

Merged
via the queue into
superdoc:main
with commit 47f92bcApr 13, 2026

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🎉 This PR is included in @superdoc-dev/react v1.2.0-next.8
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🎉 This PR is included in esign v2.3.0-next.11
The release is available on GitHub release
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🎉 This PR is included in superdoc v1.26.0-next.11
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Math: implement m:phant phantom converter (community)


2 participants

@Abdeltoto@caio-pizzol

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(math): implement m:phant phantom converter - #2749
Merged
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Apr 13, 2026
Merged
feat(math): implement m:phant phantom converter#2749
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Conversation
@Abdeltoto
@AbdeltotoAbdeltoto
commented
Apr 8, 2026

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Closes#2608
Summary
  • Implements the m:phant OMML-to-MathML converter (invisible spacing placeholder)
  • Full phantom maps to <mphantom>; partial dimension control maps to <mpadded> with zeroed width/height/depth
  • Supports m:show, m:zeroWid, m:zeroAsc, and m:zeroDesc property flags
  • Registers the converter in MATH_OBJECT_REGISTRY
  • Adds 3 unit tests covering full phantom, visible with zeroed width, and invisible with zeroed height
Spec reference
ECMA-376 Section 22.1.2.81
Test plan
  • vitest run passes for omml-to-mathml.test.ts
  •  Linter and formatter pass (lefthook pre-commit)
chatgpt-codex-connector[bot]
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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@Abdeltoto
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@Abdeltoto thanks for contributing this! the phantom converter is a nice addition and the code is clean — matches Word perfectly on 7 out of 10 test cases.
one thing to fix: when <m:show> is missing, content renders invisible but should be visible. this affects the most common phantom pattern (zeroing a dimension without explicitly setting show). left an inline comment with a one-line fix, comparison screenshots, and 10 Word-native test files.
Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
Outdated

@caio-pizzolcaio-pizzol
self-assigned this
Apr 9, 2026
Abdeltotoand others
added 4 commits
April 13, 2026 16:08
@Abdeltoto@caio-pizzol
feat(math): implement m:phant phantom converter (closessuperdoc#2608)
8cf3e3a
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): parse full ST_OnOff values in phantom converter
4e2d253
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): treat bare m:show element as visible in phantom converter
05f8582
Made-with: Cursor
@caio-pizzol
fix(math): render phantom as visible when m:show is omitted
6b0cb18
Per ECMA-376 §22.1.2.96, when <m:show> is absent from <m:phantPr> the
base content should be shown. The previous check only handled bare and
truthy-val variants, so a missing element was treated as hidden —
breaking the most common phantom pattern (zeroing a dimension without
hiding content).
Adds unit coverage for the explicit-hide case and zeroed-dimension-only
case, plus a behavior test loading a 12-case fixture that walks every
m:phantPr configuration in the spec (show absent/bare/val=0/1/true/false,
each zero flag alone and combined, m:transp passthrough).
@caio-pizzol
caio-pizzolforce-pushed
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hey @Abdeltoto — didn't want to block this any longer so I pushed the last fix myself, hope that's cool.
your two fixes from round 1 look great. the one still open was the "no m:show" case — the spec says content should show when m:show isn't there, but the old check was hiding it. one-line change and it matches Word now.
while I was in there I went through every phantom setup the spec describes (12 in total) and they all render right. added a few more unit tests for the gaps, plus a browser test that loads all 12 in one doc. the doc is in our visual test set too, so we'll catch any future breakage.
also rebased on main — a bunch of other math converters landed since you opened this, so there were some conflicts to untangle.
thanks for picking this up, the code is clean. merging once CI's green.
@caio-pizzol
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Apr 13, 2026

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(math): implement m:phant phantom converter - #2749
Merged
caio-pizzol merged 4 commits into
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Abdeltoto:feat/math-phantom-converter
Apr 13, 2026
Merged
feat(math): implement m:phant phantom converter#2749
caio-pizzol merged 4 commits into
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Abdeltoto:feat/math-phantom-converter
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@Abdeltoto
@AbdeltotoAbdeltoto
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Apr 8, 2026

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Closes#2608
Summary
  • Implements the m:phant OMML-to-MathML converter (invisible spacing placeholder)
  • Full phantom maps to <mphantom>; partial dimension control maps to <mpadded> with zeroed width/height/depth
  • Supports m:show, m:zeroWid, m:zeroAsc, and m:zeroDesc property flags
  • Registers the converter in MATH_OBJECT_REGISTRY
  • Adds 3 unit tests covering full phantom, visible with zeroed width, and invisible with zeroed height
Spec reference
ECMA-376 Section 22.1.2.81
Test plan
  • vitest run passes for omml-to-mathml.test.ts
  •  Linter and formatter pass (lefthook pre-commit)
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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@Abdeltoto
Abdeltotoforce-pushed
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feat/math-phantom-converter
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@Abdeltoto thanks for contributing this! the phantom converter is a nice addition and the code is clean — matches Word perfectly on 7 out of 10 test cases.
one thing to fix: when <m:show> is missing, content renders invisible but should be visible. this affects the most common phantom pattern (zeroing a dimension without explicitly setting show). left an inline comment with a one-line fix, comparison screenshots, and 10 Word-native test files.
Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
Outdated

@caio-pizzolcaio-pizzol
self-assigned this
Apr 9, 2026
Abdeltotoand others
added 4 commits
April 13, 2026 16:08
@Abdeltoto@caio-pizzol
feat(math): implement m:phant phantom converter (closessuperdoc#2608)
8cf3e3a
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): parse full ST_OnOff values in phantom converter
4e2d253
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): treat bare m:show element as visible in phantom converter
05f8582
Made-with: Cursor
@caio-pizzol
fix(math): render phantom as visible when m:show is omitted
6b0cb18
Per ECMA-376 §22.1.2.96, when <m:show> is absent from <m:phantPr> the
base content should be shown. The previous check only handled bare and
truthy-val variants, so a missing element was treated as hidden —
breaking the most common phantom pattern (zeroing a dimension without
hiding content).
Adds unit coverage for the explicit-hide case and zeroed-dimension-only
case, plus a behavior test loading a 12-case fixture that walks every
m:phantPr configuration in the spec (show absent/bare/val=0/1/true/false,
each zero flag alone and combined, m:transp passthrough).
@caio-pizzol
caio-pizzolforce-pushed
the
feat/math-phantom-converter
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c6b8cc6 to
6b0cb18CompareApril 13, 2026 23:13
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Apr 13, 2026

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hey @Abdeltoto — didn't want to block this any longer so I pushed the last fix myself, hope that's cool.
your two fixes from round 1 look great. the one still open was the "no m:show" case — the spec says content should show when m:show isn't there, but the old check was hiding it. one-line change and it matches Word now.
while I was in there I went through every phantom setup the spec describes (12 in total) and they all render right. added a few more unit tests for the gaps, plus a browser test that loads all 12 in one doc. the doc is in our visual test set too, so we'll catch any future breakage.
also rebased on main — a bunch of other math converters landed since you opened this, so there were some conflicts to untangle.
thanks for picking this up, the code is clean. merging once CI's green.
@caio-pizzol
caio-pizzol
added this pull request to the merge queue
Apr 13, 2026

Merged
via the queue into
superdoc:main
with commit 47f92bcApr 13, 2026

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🎉 This PR is included in @superdoc-dev/react v1.2.0-next.8
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🎉 This PR is included in esign v2.3.0-next.11
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🎉 This PR is included in superdoc v1.26.0-next.11
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🎉 This PR is included in superdoc-cli v0.7.0-next.12
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🎉 This PR is included in superdoc-sdk v1.6.0-next.9
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🎉 This PR is included in superdoc-cli v0.7.0
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🎉 This PR is included in superdoc v1.27.0
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🎉 This PR is included in @superdoc-dev/react v1.2.0
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🎉 This PR is included in superdoc-sdk v1.6.0
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Math: implement m:phant phantom converter (community)


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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
feat(math): implement m:phant phantom converter - #2749
Merged
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Apr 13, 2026
Merged
feat(math): implement m:phant phantom converter#2749
caio-pizzol merged 4 commits into
superdoc:mainfrom 
Abdeltoto:feat/math-phantom-converter
Conversation
@Abdeltoto
@AbdeltotoAbdeltoto
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Apr 8, 2026

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Closes#2608
Summary
  • Implements the m:phant OMML-to-MathML converter (invisible spacing placeholder)
  • Full phantom maps to <mphantom>; partial dimension control maps to <mpadded> with zeroed width/height/depth
  • Supports m:show, m:zeroWid, m:zeroAsc, and m:zeroDesc property flags
  • Registers the converter in MATH_OBJECT_REGISTRY
  • Adds 3 unit tests covering full phantom, visible with zeroed width, and invisible with zeroed height
Spec reference
ECMA-376 Section 22.1.2.81
Test plan
  • vitest run passes for omml-to-mathml.test.ts
  •  Linter and formatter pass (lefthook pre-commit)
chatgpt-codex-connector[bot]
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
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@Abdeltoto
Abdeltotoforce-pushed
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@Abdeltoto thanks for contributing this! the phantom converter is a nice addition and the code is clean — matches Word perfectly on 7 out of 10 test cases.
one thing to fix: when <m:show> is missing, content renders invisible but should be visible. this affects the most common phantom pattern (zeroing a dimension without explicitly setting show). left an inline comment with a one-line fix, comparison screenshots, and 10 Word-native test files.
Comment threadpackages/layout-engine/painters/dom/src/features/math/converters/phantom.ts
Outdated

@caio-pizzolcaio-pizzol
self-assigned this
Apr 9, 2026
Abdeltotoand others
added 4 commits
April 13, 2026 16:08
@Abdeltoto@caio-pizzol
feat(math): implement m:phant phantom converter (closessuperdoc#2608)
8cf3e3a
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): parse full ST_OnOff values in phantom converter
4e2d253
Made-with: Cursor
@Abdeltoto@caio-pizzol
fix(math): treat bare m:show element as visible in phantom converter
05f8582
Made-with: Cursor
@caio-pizzol
fix(math): render phantom as visible when m:show is omitted
6b0cb18
Per ECMA-376 §22.1.2.96, when <m:show> is absent from <m:phantPr> the
base content should be shown. The previous check only handled bare and
truthy-val variants, so a missing element was treated as hidden —
breaking the most common phantom pattern (zeroing a dimension without
hiding content).
Adds unit coverage for the explicit-hide case and zeroed-dimension-only
case, plus a behavior test loading a 12-case fixture that walks every
m:phantPr configuration in the spec (show absent/bare/val=0/1/true/false,
each zero flag alone and combined, m:transp passthrough).
@caio-pizzol
caio-pizzolforce-pushed
the
feat/math-phantom-converter
branch
from
c6b8cc6 to
6b0cb18CompareApril 13, 2026 23:13
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hey @Abdeltoto — didn't want to block this any longer so I pushed the last fix myself, hope that's cool.
your two fixes from round 1 look great. the one still open was the "no m:show" case — the spec says content should show when m:show isn't there, but the old check was hiding it. one-line change and it matches Word now.
while I was in there I went through every phantom setup the spec describes (12 in total) and they all render right. added a few more unit tests for the gaps, plus a browser test that loads all 12 in one doc. the doc is in our visual test set too, so we'll catch any future breakage.
also rebased on main — a bunch of other math converters landed since you opened this, so there were some conflicts to untangle.
thanks for picking this up, the code is clean. merging once CI's green.
@caio-pizzol
caio-pizzol
added this pull request to the merge queue
Apr 13, 2026

Merged
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with commit 47f92bcApr 13, 2026

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🎉 This PR is included in template-builder v1.5.0-next.11
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🎉 This PR is included in esign v2.3.0-next.11
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🎉 This PR is included in superdoc v1.26.0-next.11
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Apr 13, 2026

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🎉 This PR is included in superdoc-cli v0.7.0-next.12
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Apr 13, 2026

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🎉 This PR is included in superdoc-sdk v1.6.0-next.9
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Apr 17, 2026

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🎉 This PR is included in superdoc-cli v0.7.0
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Apr 17, 2026

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🎉 This PR is included in superdoc v1.27.0
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Apr 21, 2026

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🎉 This PR is included in @superdoc-dev/react v1.2.0
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Apr 22, 2026

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🎉 This PR is included in superdoc-sdk v1.6.0
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May 5, 2026

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🎉 This PR is included in vscode-ext v2.3.0
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Math: implement m:phant phantom converter (community)


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