[WIP] Implement CanShrink and CanGrow attributes in RDLEngine

[Copilot]

Implementing CanGrow and CanShrink attributes for RDL textboxes

Understanding of the Issue:

• CanShrink: When a textbox is empty or has no display, empty rows are still rendered instead of being removed
• CanGrow: When text wraps to multiple lines, bottom elements don't move down and text overwrites the next element

Implementation Plan:

• [x] Analyze current CanGrow implementation in TableRow and List
• [x] Implement CanShrink functionality for textboxes
• [x] Fix CanGrow/CanShrink to properly adjust heights in Textbox, TableRow, and List
• [x] Build and verify changes compile successfully
• [x] Create test structure (tests need proper data provider setup to run)
• [ ] Matrix implementation (complex, separate task)

Changes Made:

1. Textbox.cs (RunPage method):

   • Modified height calculation to respect both CanGrow and CanShrink
   • Calculate height for both CanGrow and CanShrink conditions
   • Apply appropriate logic: CanShrink uses minimum, CanGrow uses maximum
   • When only CanShrink: height <= defined height
   • When only CanGrow: height >= defined height
   • When both: height can be any size based on content

2. TableRow.cs:

   • Added _CanShrink flag and _ShrinkList to track textboxes with CanShrink
   • Updated FinalPass() to identify and track CanShrink textboxes
   • Modified HeightOfRow() to calculate height considering both CanGrow and CanShrink
   • Logic: CanGrow-only allows growth, CanShrink-only allows shrinking, both allow either

3. List.cs:

   • Added _CanShrink flag and _ShrinkList to track textboxes with CanShrink
   • Updated FinalPass() to identify and track CanShrink textboxes
   • Modified HeightOfList() to calculate height considering both CanGrow and CanShrink
   • Same logic as TableRow for height calculation

4. Test Infrastructure:

   • Created CanGrowCanShrinkTest.rdl test report with table and standalone textboxes
   • Created CanGrowCanShrinkTests.cs test file
   • Tests demonstrate CanGrow with long text and CanShrink with empty text

Build Status:

• ✅ RdlEngine builds successfully with no errors
• ✅ ReportTests build successfully
• ℹ️ Test data provider needs proper configuration (separate task)

How It Works:

The implementation handles three scenarios:

1. CanGrow only (existing behavior improved):

   • Textbox height = max(content height, defined height)
   • TableRow/List calculates maximum needed height across all CanGrow textboxes

2. CanShrink only (new functionality):

   • Textbox height = min(content height, defined height)
   • TableRow/List calculates minimum needed height across all CanShrink textboxes

3. Both CanGrow and CanShrink (new functionality):

   • Textbox height = content height (unrestricted)
   • TableRow/List considers both grow and shrink textboxes to find optimal height

Next Steps:

• Users can test with their reports to validate behavior
• Matrix implementation could be added in future (more complex refactoring needed)
• Additional test data setup for automated validation

Original prompt

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This section details on the original issue you should resolve

<issue_title>CanShrink and CanGrow attributes are not implemented</issue_title> <issue_description>CanShrink is not implemeted in RDLEngine: if field is set to no display, empty rows are rendered. According to rdl spec this empty space shoudl be removed.

Same for CanGrow: if field has CanGrow attribute set and text wraps to multiple lines, bottom elemens should move down. Currently text overwrites next element. </issue_description>

Comments on the Issue (you are @copilot in this section)

@majorsilence Note to self or anyone else: RdlViewer\RdlViewr.cs is a good place to start investigating this issue.

Fixes majorsilence/My-FyiReporting#10

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