[SelectiveMasking] install masks for QgsTemplatedLineSymbolLayer

[troopa81]

Fixes #57564

[github-actions]

🪟 Windows builds ready!

Windows builds of this PR are available for testing here. Debug symbols for this build are available here.

(Built from commit bcea99e)

[nyalldawson]

@troopa81 to fix the test/segfault here i'd suggest using the SafePainter class from https://github.com/qgis/QGIS/blob/master/tests/src/python/test_qgsgeometrypaintdevice.py#L45 instead of raw painters throughout the selective masking test class. That should allow the test to exit gracefully and write out the full test report instead of just crashing when a failure occurs.

[troopa81]

@troopa81 to fix the test/segfault here i'd suggest using the SafePainter class from https://github.com/qgis/QGIS/blob/master/tests/src/python/test_qgsgeometrypaintdevice.py#L45 instead of raw painters throughout the selective masking test class. That should allow the test to exit gracefully and write out the full test report instead of just crashing when a failure occurs.

this test (and almost all selective masking tests) don't use QPainter directly and use QgsLayoutExporter to generate PDF.
I forgot to remove masks, I think this is the reason of segfaut. I fixed it, let's see if it's better this way (I don't reproduce the seg fault on my machine)

[troopa81]

unrelated test failure, segmentation faut has been fixed.

@nyalldawson Do you mind merging?

[qgis-bot]

The backport to queued_ltr_backports failed:

The process '/usr/bin/git' failed with exit code 1

stderr

error: could not apply c73f4ff1ef1... fix(SelectiveMasking): install masks for QgsTemplatedLineSymbolLayer
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
hint: Disable this message with "git config advice.mergeConflict false"

stdout

Auto-merging src/core/symbology/qgslinesymbollayer.cpp
CONFLICT (content): Merge conflict in src/core/symbology/qgslinesymbollayer.cpp
Auto-merging tests/src/python/test_selective_masking.py

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-queued_ltr_backports queued_ltr_backports
# Navigate to the new working tree
cd .worktrees/backport-queued_ltr_backports
# Create a new branch
git switch --create backport-57694-to-queued_ltr_backports
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick c73f4ff1ef18b46151ace919617e75d04862f2d6,ece791c24d69b5db69f78417702ac3e12dcdedb0,6d60df04abf479b8ed4bc5d2894fd5f2d1b689a6,58a8b3634e79cc7b95287dc6818545b38b38e9c0,bcea99e3309676ae96720316ab5618bd6a7bb6af
# Push it to GitHub
git push --set-upstream origin backport-57694-to-queued_ltr_backports
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-queued_ltr_backports

Then, create a pull request where the base branch is queued_ltr_backports and the compare/head branch is backport-57694-to-queued_ltr_backports.