getStructureInfo()

MarvinJS 14.11.10 has the following Javascript method:

getStructureInfo()JavaScriptObject
Returns an object which provides information about the current structure on the canvas. This information can be useful for choosing the best export format. 

The properties:
Key
Type
Notes
'atomCount'
integer
the number of atoms
'bondCount'
integer
the number of bonds
'rGroupAttachmentCount'
integer
the number of R-Group attachments
'electronFlowArrowCount'
integer
the number of electron flow arrows
'straightArrowCount'
integer
the number of reaction arrow or other straight arrows
'graphicalObjectCount'
integer
the number of graphical objects such as boxes or ellipses
'sGroupCount'
integer
the number of expanded and contracted abbreviations and other S-Groups
'rGroupCount'
integer
the number of R-Groups
'hasQueryProperties'
boolean {true, false}
true if any atom or bond has advanced any query properties, true otherwise
'is3DStructure'
boolean {true, false}
true any atom has a valid z coordinate, false otherwise
'isReaction'
boolean {true, false}
true if the structure has at least one atom, and has exactly one straight arrow, false otherwise
'isRGroupMolecule'
boolean {true, false}
true if the structure has at least one atom, at least one R-Group and at least one R-Group attachment point, false otherwise

This method appears to have been eliminated in MarvinJS 15.3.23.0; it is not listed in the API, and my program halts when it encounters the line,

if (marvinSketcherInstance.getStructureInfo().atomCount === 0) {

Why has it been eliminated, is there a workaround, and do you plan to reintroduce it or something similar?

I would add that the Javascript code above did NOT cause an error message to be displayed in the console when it failed, so it took a while for me to trace the source of the problem. I don't understand why I didn't see an error message in the console.

We have plans to create a workaround of this particular usage. Could you send me a more detailed description how did you use this?

Thanks a lot,

Efi

We use it to make sure that a student's response contains a structure of some kind. It's a simple check that we prefer to do in Javascript, rather than sending it back to the server to count the atoms.

As I see, you attempt to assert whether the canvas contains any structure or not.

Please, check the isEmpty() function of the MarvinJS Sketch. I guess it may be a suitable solution for you.

https://marvinjs-demo.chemaxon.com/latest/jsdoc.html#marvin.Sketch

Yes and no. Does isEmpty() return true for the following MRV? If it returns false, then it is not suitable.

<cml><MDocument><MChemicalStruct><molecule molID="m1"><atomArray/><bondArray/></molecule></MChemicalStruct><MRectangle lineColor="#000000" id="o1"><MPoint x="-5.25" y="-0.3333333333333333"/><MPoint x="0.125" y="-0.3333333333333333"/><MPoint x="0.125" y="3.3333333333333335"/><MPoint x="-5.25" y="3.3333333333333335"/></MRectangle><MRectangle lineColor="#000000" id="o2"><MPoint x="3.4583333333333335" y="-0.4583333333333333"/><MPoint x="8.583333333333334" y="-0.4583333333333333"/><MPoint x="8.583333333333334" y="3.25"/><MPoint x="3.4583333333333335" y="3.25"/></MRectangle><MPolyline headLength="0.6" headWidth="0.4" id="o3"><MRectanglePoint rectRef="o1" pos="5"/><MRectanglePoint rectRef="o2" pos="7"/></MPolyline></MDocument></cml>

Of course, in the referred case, isEmpty() returns with false. Unless the canvas is dirty, this function returns with true.

Then isEmpty() is not suitable, and I would like you to restore getStructureInfo().