Preserve multiline $$...$$ blocks for MathJax rendering in markdown preview

[Copilot]

Complex multiline LaTeX display equations were being mangled during Markdown parsing, so MathJax received altered input and failed to render advanced expressions. Simple one-line formulas continued to work, masking the parser-level issue.

• Root cause

  • Markdown parsing (marked with breaks: true) could transform display-math blocks before MathJax typesetting, especially for multiline equations.

• Changes made

  • Added a dedicated Marked block extension for display math in script.js and mirrored it in desktop-app/resources/js/script.js.
  • Tokenizes $$...$$ as a block unit and renders it as preserved raw math content, preventing line-break HTML injection inside math blocks.
  • Kept existing MathJax flow and fallback behavior intact; only the pre-typesetting markdown handling for display math was adjusted.

• Implementation sketch

  const blockMathExtension = {
    name: 'blockMath',
    level: 'block',
    start(src) { /* find $$ marker */ },
    tokenizer(src) { /* capture multiline $$...$$ */ },
    renderer(token) {
      return `<div class="math-block">$$\n${token.text}\n$$</div>\n`;
    }
  };
  
  marked.use({ extensions: [blockMathExtension] });

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• accounts.google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7218 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-lDMVOk --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,17235199829011133881,7315929723994192640,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,1895246449550089126,1163112893178068172,4 (dns block)
  • Triggering command: /usr/bin/chromium-browser /usr/bin/chromium-browser --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-crash-reporter --disable-default-apps --disable-dev-shm-usage --disable-hang-monitor --disable-infobars --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-REDACTEDing --disable-search-engine-choice-screen --disable-sync --enable-automation (dns block)
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7432 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-TVe1du --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,14567305394623679600,6031124768362602096,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,11348099514426380892,10160323083493952654,4 (dns block)
• android.clients.google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7218 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-lDMVOk --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,17235199829011133881,7315929723994192640,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,1895246449550089126,1163112893178068172,4 (dns block)
  • Triggering command: /usr/bin/chromium-browser /usr/bin/chromium-browser --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-crash-reporter --disable-default-apps --disable-dev-shm-usage --disable-hang-monitor --disable-infobars --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-REDACTEDing --disable-search-engine-choice-screen --disable-sync --enable-automation (dns block)
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7432 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-TVe1du --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,14567305394623679600,6031124768362602096,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,11348099514426380892,10160323083493952654,4 (dns block)
• cdn.jsdelivr.net
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7218 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-lDMVOk --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,17235199829011133881,7315929723994192640,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,1895246449550089126,1163112893178068172,4 (dns block)
  • Triggering command: /usr/bin/chromium-browser /usr/bin/chromium-browser --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-crash-reporter --disable-default-apps --disable-dev-shm-usage --disable-hang-monitor --disable-infobars --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-REDACTEDing --disable-search-engine-choice-screen --disable-sync --enable-automation (dns block)
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7432 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-TVe1du --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,14567305394623679600,6031124768362602096,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,11348099514426380892,10160323083493952654,4 (dns block)
• cdnjs.cloudflare.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7218 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-lDMVOk --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,17235199829011133881,7315929723994192640,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,1895246449550089126,1163112893178068172,4 (dns block)
  • Triggering command: /usr/bin/chromium-browser /usr/bin/chromium-browser --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-crash-reporter --disable-default-apps --disable-dev-shm-usage --disable-hang-monitor --disable-infobars --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-REDACTEDing --disable-search-engine-choice-screen --disable-sync --enable-automation (dns block)
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7432 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-TVe1du --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,14567305394623679600,6031124768362602096,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,11348099514426380892,10160323083493952654,4 (dns block)
• clients2.google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7218 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-lDMVOk --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,17235199829011133881,7315929723994192640,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,1895246449550089126,1163112893178068172,4 (dns block)
  • Triggering command: /usr/bin/chromium-browser /usr/bin/chromium-browser --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-crash-reporter --disable-default-apps --disable-dev-shm-usage --disable-hang-monitor --disable-infobars --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-REDACTEDing --disable-search-engine-choice-screen --disable-sync --enable-automation (dns block)
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7432 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-TVe1du --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,14567305394623679600,6031124768362602096,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,11348099514426380892,10160323083493952654,4 (dns block)
• content-autofill.googleapis.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7218 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-lDMVOk --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,17235199829011133881,7315929723994192640,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,1895246449550089126,1163112893178068172,4 (dns block)
  • Triggering command: /usr/bin/chromium-browser /usr/bin/chromium-browser --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-crash-reporter --disable-default-apps --disable-dev-shm-usage --disable-hang-monitor --disable-infobars --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-REDACTEDing --disable-search-engine-choice-screen --disable-sync --enable-automation (dns block)
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7432 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-TVe1du --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,14567305394623679600,6031124768362602096,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,11348099514426380892,10160323083493952654,4 (dns block)
• www.google.com
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7218 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-lDMVOk --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,17235199829011133881,7315929723994192640,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,1895246449550089126,1163112893178068172,4 (dns block)
  • Triggering command: /usr/bin/chromium-browser /usr/bin/chromium-browser --allow-pre-commit-input --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-crash-reporter --disable-default-apps --disable-dev-shm-usage --disable-hang-monitor --disable-infobars --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-REDACTEDing --disable-search-engine-choice-screen --disable-sync --enable-automation (dns block)
  • Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=network --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --mute-audio --crashpad-handler-pid=7432 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/puppeteer_dev_chrome_profile-TVe1du --change-stack-guard-on-fork=enable --shared-files=network_parent_dirs_pipe:100,v8_context_snapshot_data:101 --field-trial-handle=3,i,14567305394623679600,6031124768362602096,262144 --enable-features=PdfOopif --disable-features=AcceptCHFrame,IsolateSandboxedIframes,MediaRouter,OptimizationHints,PaintHolding,ProcessPerSiteUpToMainFrameThreshold,Translate --variations-seed-version --pseudonymization-salt-handle=7,i,11348099514426380892,10160323083493952654,4 (dns block)

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[Copilot]

Pull request overview

Adds a custom marked block extension to preserve $$...$$ display-math blocks during Markdown parsing, preventing line-break HTML from being injected inside multiline LaTeX so MathJax can render them correctly. The same extension is mirrored in the desktop-app copy of the script to keep web and desktop builds in sync.

Changes:

• Introduce blockMathExtension (start/tokenizer/renderer) that captures $$...$$ as a single block token and emits a <div class="math-block"> wrapper.
• Register the extension via marked.use({ extensions: [...] }) before marked.setOptions.
• Apply the same change to desktop-app/resources/js/script.js to mirror the root script.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
script.js	Adds block-math marked extension to preserve multiline $$...$$ for MathJax.
desktop-app/resources/js/script.js	Mirrors the block-math extension in the desktop app copy.

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