Inline <style> and <link> support

[FurryR]

Implements #1.

Caveat

• When using <link>, CSS3 @import syntax is not supported (there's also problems on URL handling). However it is unable to fix the caveat without making REALLY huge changes, so I will just leave it. Maybe you should add a todo for it.

Relevant possibly incompatible changes

My package manager is unable to resolve all the dependencies under Python version >=3.8. I bumped it to >=3.9 for fix. This may result in incompatibility.

Detailed output (pdm):

❯ pdm install
WARNING: Lockfile does not exist
Updating the lock file...
INFO: Virtualenv /home/(redacted)/html2pic/.venv is reused.
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping pictex@2.0.1 because it requires
Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of pictex that supports Python>=3.8
will be used.
If you want to install pictex@2.0.1, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping pictex@2.0.0 because it requires
Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of pictex that supports Python>=3.8
will be used.
If you want to install pictex@2.0.0, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping tinycss2@1.5.1 because it
requires Python>=3.10 but the lock targets to work with Python>=3.8. Instead, another version of tinycss2 that supports
Python>=3.8 will be used.
If you want to install tinycss2@1.5.1, narrow down the `requires-python` range to include this version. For example,
">=3.10" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping tinycss2@1.5.0 because it
requires Python>=3.10 but the lock targets to work with Python>=3.8. Instead, another version of tinycss2 that supports
Python>=3.8 will be used.
If you want to install tinycss2@1.5.0, narrow down the `requires-python` range to include this version. For example,
">=3.10" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping soupsieve@2.8.2 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of soupsieve that supports
Python>=3.8 will be used.
If you want to install soupsieve@2.8.2, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping soupsieve@2.8.1 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of soupsieve that supports
Python>=3.8 will be used.
If you want to install soupsieve@2.8.1, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping soupsieve@2.8 because it requires
Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of soupsieve that supports
Python>=3.8 will be used.
If you want to install soupsieve@2.8, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping typing-extensions@4.15.0 because
it requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of typing-extensions
that supports Python>=3.8 will be used.
If you want to install typing-extensions@4.15.0, narrow down the `requires-python` range to include this version. For
example, ">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping typing-extensions@4.14.1 because
it requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of typing-extensions
that supports Python>=3.8 will be used.
If you want to install typing-extensions@4.14.1, narrow down the `requires-python` range to include this version. For
example, ">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping typing-extensions@4.14.0 because
it requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of typing-extensions
that supports Python>=3.8 will be used.
If you want to install typing-extensions@4.14.0, narrow down the `requires-python` range to include this version. For
example, ">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping importlib-resources@6.5.2 because
it requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of importlib-resources
that supports Python>=3.8 will be used.
If you want to install importlib-resources@6.5.2, narrow down the `requires-python` range to include this version. For
example, ">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping importlib-resources@6.5.1 because
it requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of importlib-resources
that supports Python>=3.8 will be used.
If you want to install importlib-resources@6.5.1, narrow down the `requires-python` range to include this version. For
example, ">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping importlib-resources@6.5.0 because
it requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of importlib-resources
that supports Python>=3.8 will be used.
If you want to install importlib-resources@6.5.0, narrow down the `requires-python` range to include this version. For
example, ">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2026.1.15 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2026.1.15, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2026.1.14 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2026.1.14, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.11.3 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.11.3, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.10.23 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.10.23, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.10.22 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.10.22, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.9.18 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.9.18, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.9.1 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.9.1, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.8.29 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.8.29, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.7.34 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.7.34, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.7.33 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.7.33, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.7.31 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.7.31, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
/usr/lib/python3/dist-packages/pdm/resolver/providers.py:191: PackageWarning: Skipping regex@2025.7.29 because it
requires Python>=3.9 but the lock targets to work with Python>=3.8. Instead, another version of regex that supports
Python>=3.8 will be used.
If you want to install regex@2025.7.29, narrow down the `requires-python` range to include this version. For example,
">=3.9" should work.
  return self.repository.find_candidates(
  0:00:25 🔒 Lock failed.  ERROR: Unable to find a resolution because the following dependencies don't work on all Python versions in the range of
the project's `requires-python`: >=3.8.
  python>=3.9 (from <Candidate pictex@2.0.0 from https://pypi.org/simple/pictex/>)
  python>=3.9 (from <Candidate pictex@2.0.1 from https://pypi.org/simple/pictex/>)
A possible solution is to change the value of `requires-python` in pyproject.toml to >=3.9.
  0:00:25 🔒 Lock failed.
See /home/(redacted)/.local/state/pdm/log/pdm-lock-76c5lwha.log for detailed debug log.
[ResolutionImpossible]: Unable to find a resolution
WARNING: Add '-v' to see the detailed traceback

.gitignore is changed slightly to work with PDM. This should work fine with previous versions.

[FurryR]

If necessary, you can cherry-pick the first commit if you wish to import requests as default fetcher.

Test cases / Changelog / Examples is not ready for the new feature, while author information is also not updated. If necessary you may update them manually.

[francozanardi]

Hey @FurryR :)

Thanks for opening this PR. I will review it in the next days and let you know.