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allow an empty field name if filters are provided

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This is to make it easier for add-ons to provide extra content that
degrades nicely on platforms that don't have the add-on.
This commit is contained in:
Damien Elmes 2020-01-15 18:48:23 +10:00
parent a34e5b3246
commit 99c45c5fbc
1 changed files with 21 additions and 0 deletions
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21
rslib/src/template.rs
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@ -316,6 +316,16 @@ fn render_into(
});
}
}
Replacement { key: "", filters } if !filters.is_empty() => {
// if a filter is provided, we accept an empty field name to
// mean 'pass an empty string to the filter, and it will add
// its own text'
rendered_nodes.push(RenderedNode::Replacement {
field_name: "".to_string(),
current_text: "".to_string(),
filters: filters.iter().map(|&f| f.to_string()).collect(),
})
}
Replacement { key, filters } => {
// apply built in filters if field exists
let (text, remaining_filters) = match context.fields.get(key) {
@ -741,6 +751,17 @@ mod test {
text: "{unknown field foo:text:X}".to_owned()
}]
);
// a blank field is allowed if it has filters
tmpl = PT::from_text("{{filter:}}").unwrap();
assert_eq!(
tmpl.render(&ctx),
vec![FN::Replacement {
field_name: "".to_string(),
current_text: "".to_string(),
filters: vec!["filter".to_string()]
}]
);
}
fn get_complete_template(nodes: &Vec<RenderedNode>) -> Option<&str> {