Preview: When Reaction Conditions text field is empty, clicking on placeholder text on canvas results in a blank line, with no visible text

[Zhirnoff]

Steps to Reproduce

1. Copy and Paste on canvas

   $RDFILE 1
   $DATM    11/05/24 13:20
   $RFMT
   $RXN
   
   -INDIGO- 1105241320
   
   2  1
   $MOL
   
   -INDIGO-11052413202D
   
   6  6  0  0  0  0  0  0  0  0999 V2000
   10.2348   -7.2251    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.9652   -7.2246    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.1016   -6.7250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.9652   -8.2255    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.2348   -8.2300    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.1038   -8.7250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   3  1  2  0  0  0  0
   1  5  1  0  0  0  0
   5  6  2  0  0  0  0
   6  4  1  0  0  0  0
   4  2  2  0  0  0  0
   2  3  1  0  0  0  0
   M  END
   $MOL
   
   -INDIGO-11052413202D
   
   6  6  0  0  0  0  0  0  0  0999 V2000
   10.1098   -9.5751    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.8402   -9.5746    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.9766   -9.0750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.8402  -10.5755    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.1098  -10.5800    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.9788  -11.0750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   3  1  2  0  0  0  0
   1  5  1  0  0  0  0
   5  6  2  0  0  0  0
   6  4  1  0  0  0  0
   4  2  2  0  0  0  0
   2  3  1  0  0  0  0
   M  END
   $MOL
   
   -INDIGO-11052413202D
   
   6  6  0  0  0  0  0  0  0  0999 V2000
   14.0348   -8.5251    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   15.7652   -8.5246    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.9016   -8.0250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   15.7652   -9.5255    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.0348   -9.5300    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.9038  -10.0250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   3  1  2  0  0  0  0
   1  5  1  0  0  0  0
   5  6  2  0  0  0  0
   6  4  1  0  0  0  0
   4  2  2  0  0  0  0
   2  3  1  0  0  0  0
   M  END
   $DTYPE Name
   $DATUM Asderwydfgewsghdjedghdfertsdfg
   $DTYPE Reference
   $DATUM Not available
   $DTYPE Reaction Conditions
   $DATUM  

Actual behavior When 'Reaction Conditions text' field is empty, clicking on placeholder text on canvas results in a blank line, with no visible text

Expected behavior If the 'Reaction Conditions text' field is empty, either no placeholder should appear on the canvas

Screenshot

Desktop:

• OS: Windows 11
• Browser Chrome
• Version 128.0.6613.120 (Official Build) (64-bit)

Ketcher version [Version 2.26.0-rc.7] Indigo version [Version 1.27.0-dev.1]

Bug foun while pre-testing: https://github.com/epam/Indigo/issues/2559

[ivanmaslow]

The fix is verified on on CI-CD SA environment with Ketcher-Master, Indigo-2404-ket-to-rdf branches:

• Ketcher [Version 2.28.0-dev.1] Build at 2024-11-20; 09:14:36
• Indigo Version 1.27.0-dev.1.38-g6c821972-wasm32-wasm-clang-12.0.0
• Desktop, Windows 11 Enterprise
• Chrome Version 131.0.6778.70 (Official Build) (64-bit)

No additional new lines are added in this case: