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Support global macros via the importvariables widget

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The new importvariables widget imports macro/variable definitions from
the specified tiddlers and makes them available to its children.

Allows us to split PageMacros up into separate tiddlers.

We still support loading macros from $:/core/ui/PageMacros to help
people upgrading.

Fixes #644 and #559
This commit is contained in:
Jermolene
2014-06-12 18:01:33 +01:00
parent 0e09fbf46a
commit 9ab0c84140
12 changed files with 211 additions and 52 deletions
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editions/tw5.com/tiddlers/widgets/ImportVariablesWidget.tid Normal file
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created: 20140612142500000
modified: 20140612175900970
tags: widget
title: ImportVariablesWidget
type: text/vnd.tiddlywiki
! Introduction
The ImportVariablesWidget imports macro and variable definitions from a list of other tiddlers and makes them available to its children. For example:
```
<$importvariables filter="[tag[mySpecialMacros]]">
All the macros defined in tiddlers with the tag "mySpecialMacros" are available here
</$importvariables>
```
! Attributes and Content
The content of the importvariables widget is the scope within which the imported variable definitions are available.
|!Attribute |!Description |
|filter |[[Tiddler filter|TiddlerFilters]] defining the tiddlers from which macro definitions will be imported |
! Global Macros
So-called global macros are implemented within the main page template ([[$:/core/ui/PageTemplate]]) by wrapping the page content in the following importvariables widget:
```
<$importvariables filter="[[$:/core/ui/PageMacros]] [all[shadows+tiddlers]tag[$:/tags/Macro]!has[draft.of]]">
...
</$importvariables>
```