[StickyScrolling] Refactoring sticky lines provider and handler

[Christopher-Hermann]

Refactors the sticky lines provider and extract the method to an interface. This is a preparation step for providing a extension point for sticky lines provider.

[github-actions]

Test Results

 1 815 files  ±0   1 815 suites  ±0   1h 33m 34s ⏱️ - 2m 3s
 7 699 tests ±0   7 471 ✅ ±0  228 💤 ±0  0 ❌ ±0 
24 258 runs  ±0  23 511 ✅ ±0  747 💤 ±0  0 ❌ ±0 

Results for commit 91997cd. ± Comparison against base commit c603575.

This pull request removes 10 and adds 10 tests. Note that renamed tests count towards both.

org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testEmptySourceCode
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testIgnoreEmptyLines
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testLineUnderStickyLine
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testLinesWithTabs
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testNewStickyRoot
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testRemoveStickyLines
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testSingleStickyLine
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testSourceViewerWithDifferentModelAndWindgetLines
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testStartAtEmptyLineWithNext
org.eclipse.ui.internal.texteditor.stickyscroll.StickyLinesProviderTest ‑ testStartAtEmptyLineWithPrevious

org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testEmptySourceCode
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testIgnoreEmptyLines
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testLineUnderStickyLine
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testLinesWithTabs
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testNewStickyRoot
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testRemoveStickyLines
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testSingleStickyLine
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testSourceViewerWithDifferentModelAndWindgetLines
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testStartAtEmptyLineWithNext
org.eclipse.ui.internal.texteditor.stickyscroll.DefaultStickyLinesProviderTest ‑ testStartAtEmptyLineWithPrevious

♻️ This comment has been updated with latest results.

[Christopher-Hermann]

Failing test is unrelated.

[BeckerWdf]

I just read through very briefly..