So far it appears to be totally backwards compatible... In practice, I think maybe this and the conversion of the other macros should go into a separate subsequent PR.
The basic idea is that if we don't find a variable `foo` then we fallback to retrieving the value from the tiddler `$:/global/foo`, if it exists.
This allows us to replace the usual importvariables-based mechanism for global definitions, avoiding cluttering up the variable namespace with every macro.
In order to permit subprocedures to be overridden, we also introduce a mechanism for conditional definitions: preceding the word definition|procedure|function|widget with a + causes the definition only to occur if the specified variable doesn't already exist. In the next commit we'll apply this mechanism to the tabs macro
* Fix for Bug #6618
This Commit fixes Bug #6618. It is a little bit more complicated than
using one tiddler to store the new value for a field. Because the
following can happen:
* The user types "not-a-date" into the field value of a simple text field.
* The user now selects a field name that uses a HTML5 date editor. The
Editor will show no date because the value cannot be parsed.
* The user saves the tiddler by clicking the checkmark.
Now the date-field contains the value "not-a-date" but the user was not
aware that this will be added. The edit control showed no date (because
the value was invalid) and the user assumed the field was empty and
won't be added to the tiddler.
To prevent this, every kind of field editor gets its own storage tiddler.
Its name is derived from the SHA256-hash of the name of the tiddler that
is returned by the Field Editor Cascade. That way every editor in the
cascade is only seeing its input. As long as the default setup (with one
default editor) is used, everything works like in 5.2.1.
This commit also fixes the bug that the after adding a field the
field-type input box was not focused again.
* Update Documentation for Field Editor Cascade
The fix for bug #6618 makes the handling of the tiddler backing the edit
operation much more complicated. See previous commit "Fix for Bug #6618"
for more details.
There are two big changes here:
Replace the previous "ts-wrapper" mechanism, which we had been using to redefine custom widgets inside their definitions to prevent recursive calls. Now we've got the genesis widget we can instead control recursion through a new "$remappable" attribute that allows the custom widget mechanism to be skipped.
We also extend the slot widget to allow a depth to be specified; it then reaches up by the indicated number of transclusion widgets to find the one from which it should retrieve the slot value.
