CmdPal: Plain text viewer and image viewer IContent [Experiment]

[jiripolasek]

Summary of the Pull Request

This ii a bit ahead of its time. I need as part of yet another PoC, but it’s best to keep it separate.

This PR introduces new types of IContent:

• Plain text content – simple and straightforward, with options to switch between UI and monospace fonts and toggle word wrap.
  • It's super safe to display any random text content without having to worry about escaping the pesky markdown.
• Image viewer content – a more polished way to display images:
  • When placed in the ContentPage, the component automatically resizes to fit the viewport, ensuring the entire image is visible at once.
  • Images can be opened in a built-in mini-viewer that lets you view, pan, and zoom without leaving the Command Palette. (Doing this directly on the page proved to be a UX and development headache.) Fully keyboard-controllable, so there’s no need to take your hands off the keys.

Pictures? Pictures!

Plain text content:

Image viewer content:

Recording.2025-11-29.064042.mp4

PR Checklist

• Closes: CmdPal: New content block for plain text (PlainTextContent) #41038

• Communication: I've discussed this with core contributors already. If the work hasn't been agreed, this work might be rejected
• Tests: Added/updated and all pass
• Localization: All end-user-facing strings can be localized
• Dev docs: Added/updated
• New binaries: Added on the required places
  • JSON for signing for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[github-actions]

@check-spelling-bot Report

🔴 Please review

See the 📂 files view, the 📜action log, or 📝 job summary for details.

Unrecognized words (2)

Letraset
vmh

To accept these unrecognized words as correct, you could run the following commands

... in a clone of the git@github.com:jiripolasek/PowerToys.git repository
on the feature/41038-cmdpal-moar-content branch (ℹ️ how do I use this?):

curl -s -S -L 'https://raw.githubusercontent.com/check-spelling/check-spelling/c635c2f3f714eec2fcf27b643a1919b9a811ef2e/apply.pl' |
perl - 'https://github.com/microsoft/PowerToys/actions/runs/19779793930/attempts/1' &&
git commit -m 'Update check-spelling metadata'

Pattern suggestions ✂️ (1)

You could add these patterns to .github/actions/spell-check/patterns.txt:

# Automatically suggested patterns

# hit-count: 2 file-count: 1
# Lorem
# Update Lorem based on your content (requires `ge` and `w` from https://github.com/jsoref/spelling; and `review` from https://github.com/check-spelling/check-spelling/wiki/Looking-for-items-locally )
# grep '^[^#].*lorem' .github/actions/spelling/patterns.txt|perl -pne 's/.*i..\?://;s/\).*//' |tr '|' "\n"|sort -f |xargs -n1 ge|perl -pne 's/^[^:]*://'|sort -u|w|sed -e 's/ .*//'|w|review -
# Warning, while `(?i)` is very neat and fancy, if you have some binary files that aren't proper unicode, you might run into:
# ... Operation "substitution (s///)" returns its argument for non-Unicode code point 0x1C19AE (the code point will vary).
# ... You could manually change `(?i)X...` to use `[Xx]...`
# ... or you could add the files to your `excludes` file (a version after 0.0.19 should identify the file path)
(?:(?:\w|\s|[,.])*\b(?i)(?:amet|consectetur|cursus|dolor|eros|ipsum|lacus|libero|ligula|lorem|magna|neque|nulla|suscipit|tempus)\b(?:\w|\s|[,.])*)

Alternatively, if a pattern suggestion doesn't make sense for this project, add a #
to the beginning of the line in the candidates file with the pattern to stop suggesting it.

Notices ℹ️ (1)

See the 📂 files view, the 📜action log, or 📝 job summary for details.

ℹ️ Notices	Count
ℹ️ candidate-pattern	1

See ℹ️ Event descriptions for more information.

If the flagged items are 🤯 false positives

If items relate to a ...

• binary file (or some other file you wouldn't want to check at all).

  Please add a file path to the excludes.txt file matching the containing file.

  File paths are Perl 5 Regular Expressions - you can test yours before committing to verify it will match your files.

  ^ refers to the file's path from the root of the repository, so ^README\.md$ would exclude README.md (on whichever branch you're using).

• well-formed pattern.

  If you can write a pattern that would match it,
  try adding it to the patterns.txt file.

  Patterns are Perl 5 Regular Expressions - you can test yours before committing to verify it will match your lines.

  Note that patterns can't match multiline strings.