How did the buildin help get the correct topic

[af0815]

I am searching about the information how the helpsystem inside of the lazarus ide (editor) works. I find the parts, how the ide communicates with the lhelp system, but nothing about the generation of the correckt topic.

Example:
if i go inside a sourcecode, and put my cursor on the word class and press F1
the ref.chm is open in chapter 6 classes and i see in the last lines of lhelp 'ms-its:ref.chm/ref/refch6.html'.

Question:
Which part of the ide is for generation the topic (keyword). In which sourcecode, can i start to understand this ?

[marcov]

I guess it is function TIDEHelpManager.ShowHelpForSourcePosition(const Filename: string; in ide/idehelpmanager

[af0815]

Yes, thanks. This was the missing link :-)

Also a good entrypoint for the understanding is
function TIDEHelpManager.ConvertCodePosToPascalHelpContext(

the ide/idehelpmanager.pas is the best place if you want to dive in the help system of lazarus.