Introduce focus handling mechanism

[Jermolene]

It is proposed to introduce a new focus-tracking mechanism that tracks and restores the currently focussed input widget across refresh cycles. This would fix a long-standing issue with TiddlyWiki: the inability to edit fields of the current tiddler (eg, with <$edit field="myfield"/>). By keeping track of a stack of previously focussed widgets this would also allow the implementation of edit toolbar buttons that operate on the current selection in the text box.

(It would also allow #1527 to be re-merged. The story there was that I added the ability to navigate to a tiddler in edit mode by clicking on it, matching an earlier change to the view mode behaviour. This was all done to make it possible to bring a tiddler to the front of the stacked view by clicking on it. Anyhow, the trouble with the change was that navigating to the tiddler caused it to be refreshed which lost the current focus and selection. With the change proposed here, the refresh would be harmless).

[Spangenhelm]

+:100: Will this work with changing the tiddler's content too or just its fields ?

Thank you

[Jermolene]

Will this work with changing the tiddler's content too or just its fields ?

It will work with all fields, including the text field.

[Spangenhelm]

Hi, any news on this ? i think a lot of people would be interested!

[danielo515]

I can't see how this will allow other widgets/macros to access the selected text on the current field, but I would love to see this implemented. Please go for it!

[Jermolene]

Hi @Spangenhelm @danielo515 I haven't had a chance to work on this I'm afraid.

[pmario]

@Jermolene -- I think this one can be closed. We do have this mechanism as good as it can be done

[Jermolene]

Hi @pmario I do still think that the OP would be useful and feasible, and I hope to be able to implement it at some point.

[pmario]

I think that's possible now with the following code. I'm probably missing something in the OP

<$edit-text field=xx />

xx: {{!!xx}}

<$edit-text field=yy />

yy: {{!!yy}}

[Jermolene]

Hi @pmario the OP is proposing a general fix to the focus preservation problem; all we have at the moment is an optimisation to avoid problems when a different field of the target tiddler changes.