Get Template Source Collaboration¶
When we get a templates source, we want to expand macros references.
PT – The page template
PT2 – Another page template
TI – An object that implements the TALImplementation interface.
- CTAL – A compiled TAL data structure returned from a TAL compile
CTAL2 – ditto.
EEF – An object that implements the ExpressionEngineFactory interface.
EE – An object that implements the ExpressionEngine interface.
- cexpr – A compiled expression. This will be context-dependent. For
- example, when we are executing a define. this will be a different expression for each definition.
PT calls EEF.create(data)
to create an expression engine. The expression is passed names to be included in the standard namespace. The call returns an expression engine, EE.
PT calls TI.getSource(CTAL, EE)
When a use-macro is encountered,
TI calls EE.macro(cexpr)
The expression engine evaluates the expression. This is likely to involve traversal into a page template, which will ask the TAL implementation for the macro.
PT2 calls TI.findMacro(CTAL2, name)