1 files changed, 333 insertions, 0 deletions
diff --git a/vendor/handlebars/src/partial.rs b/vendor/handlebars/src/partial.rs
new file mode 100644
index 000000000..a472d5d14
--- /dev/null
+++ b/vendor/handlebars/src/partial.rs
@@ -0,0 +1,333 @@
+use std::borrow::Cow;
+use std::collections::HashMap;
+
+use serde_json::value::Value as Json;
+
+use crate::block::BlockContext;
+use crate::context::{merge_json, Context};
+use crate::error::RenderError;
+use crate::json::path::Path;
+use crate::output::Output;
+use crate::registry::Registry;
+use crate::render::{Decorator, Evaluable, RenderContext, Renderable};
+use crate::template::Template;
+
+pub(crate) const PARTIAL_BLOCK: &str = "@partial-block";
+
+fn find_partial<'reg: 'rc, 'rc: 'a, 'a>(
+    rc: &'a RenderContext<'reg, 'rc>,
+    r: &'reg Registry<'reg>,
+    d: &Decorator<'reg, 'rc>,
+    name: &str,
+) -> Result<Option<Cow<'a, Template>>, RenderError> {
+    if let Some(ref partial) = rc.get_partial(name) {
+        return Ok(Some(Cow::Borrowed(partial)));
+    }
+
+    if let Some(tpl) = r.get_or_load_template_optional(name) {
+        return tpl.map(Option::Some);
+    }
+
+    if let Some(tpl) = d.template() {
+        return Ok(Some(Cow::Borrowed(tpl)));
+    }
+
+    Ok(None)
+}
+
+pub fn expand_partial<'reg: 'rc, 'rc>(
+    d: &Decorator<'reg, 'rc>,
+    r: &'reg Registry<'reg>,
+    ctx: &'rc Context,
+    rc: &mut RenderContext<'reg, 'rc>,
+    out: &mut dyn Output,
+) -> Result<(), RenderError> {
+    // try eval inline partials first
+    if let Some(t) = d.template() {
+        t.eval(r, ctx, rc)?;
+    }
+
+    let tname = d.name();
+    if rc.is_current_template(tname) {
+        return Err(RenderError::new("Cannot include self in >"));
+    }
+
+    // if tname == PARTIAL_BLOCK
+    let partial = find_partial(rc, r, d, tname)?;
+
+    if let Some(t) = partial {
+        // clone to avoid lifetime issue
+        // FIXME refactor this to avoid
+        let mut local_rc = rc.clone();
+        let is_partial_block = tname == PARTIAL_BLOCK;
+
+        if is_partial_block {
+            local_rc.inc_partial_block_depth();
+        }
+
+        let mut block_created = false;
+
+        if let Some(ref base_path) = d.param(0).and_then(|p| p.context_path()) {
+            // path given, update base_path
+            let mut block = BlockContext::new();
+            *block.base_path_mut() = base_path.to_vec();
+            block_created = true;
+            local_rc.push_block(block);
+        } else if !d.hash().is_empty() {
+            let mut block = BlockContext::new();
+            // hash given, update base_value
+            let hash_ctx = d
+                .hash()
+                .iter()
+                .map(|(k, v)| (*k, v.value()))
+                .collect::<HashMap<&str, &Json>>();
+
+            let merged_context = merge_json(
+                local_rc.evaluate2(ctx, &Path::current())?.as_json(),
+                &hash_ctx,
+            );
+            block.set_base_value(merged_context);
+            block_created = true;
+            local_rc.push_block(block);
+        }
+
+        // @partial-block
+        if let Some(pb) = d.template() {
+            local_rc.push_partial_block(pb);
+        }
+
+        let result = t.render(r, ctx, &mut local_rc, out);
+
+        // cleanup
+        if block_created {
+            local_rc.pop_block();
+        }
+
+        if is_partial_block {
+            local_rc.dec_partial_block_depth();
+        }
+
+        if d.template().is_some() {
+            local_rc.pop_partial_block();
+        }
+
+        result
+    } else {
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use crate::context::Context;
+    use crate::error::RenderError;
+    use crate::output::Output;
+    use crate::registry::Registry;
+    use crate::render::{Helper, RenderContext};
+
+    #[test]
+    fn test() {
+        let mut handlebars = Registry::new();
+        assert!(handlebars
+            .register_template_string("t0", "{{> t1}}")
+            .is_ok());
+        assert!(handlebars
+            .register_template_string("t1", "{{this}}")
+            .is_ok());
+        assert!(handlebars
+            .register_template_string("t2", "{{#> t99}}not there{{/t99}}")
+            .is_ok());
+        assert!(handlebars
+            .register_template_string("t3", "{{#*inline \"t31\"}}{{this}}{{/inline}}{{> t31}}")
+            .is_ok());
+        assert!(handlebars
+            .register_template_string(
+                "t4",
+                "{{#> t5}}{{#*inline \"nav\"}}navbar{{/inline}}{{/t5}}"
+            )
+            .is_ok());
+        assert!(handlebars
+            .register_template_string("t5", "include {{> nav}}")
+            .is_ok());
+        assert!(handlebars
+            .register_template_string("t6", "{{> t1 a}}")
+            .is_ok());
+        assert!(handlebars
+            .register_template_string(
+                "t7",
+                "{{#*inline \"t71\"}}{{a}}{{/inline}}{{> t71 a=\"world\"}}"
+            )
+            .is_ok());
+        assert!(handlebars.register_template_string("t8", "{{a}}").is_ok());
+        assert!(handlebars
+            .register_template_string("t9", "{{> t8 a=2}}")
+            .is_ok());
+
+        assert_eq!(handlebars.render("t0", &1).ok().unwrap(), "1".to_string());
+        assert_eq!(
+            handlebars.render("t2", &1).ok().unwrap(),
+            "not there".to_string()
+        );
+        assert_eq!(handlebars.render("t3", &1).ok().unwrap(), "1".to_string());
+        assert_eq!(
+            handlebars.render("t4", &1).ok().unwrap(),
+            "include navbar".to_string()
+        );
+        assert_eq!(
+            handlebars
+                .render("t6", &btreemap! {"a".to_string() => "2".to_string()})
+                .ok()
+                .unwrap(),
+            "2".to_string()
+        );
+        assert_eq!(
+            handlebars.render("t7", &1).ok().unwrap(),
+            "world".to_string()
+        );
+        assert_eq!(handlebars.render("t9", &1).ok().unwrap(), "2".to_string());
+    }
+
+    #[test]
+    fn test_include_partial_block() {
+        let t0 = "hello {{> @partial-block}}";
+        let t1 = "{{#> t0}}inner {{this}}{{/t0}}";
+
+        let mut handlebars = Registry::new();
+        assert!(handlebars.register_template_string("t0", t0).is_ok());
+        assert!(handlebars.register_template_string("t1", t1).is_ok());
+
+        let r0 = handlebars.render("t1", &true);
+        assert_eq!(r0.ok().unwrap(), "hello inner true".to_string());
+    }
+
+    #[test]
+    fn test_self_inclusion() {
+        let t0 = "hello {{> t1}} {{> t0}}";
+        let t1 = "some template";
+        let mut handlebars = Registry::new();
+        assert!(handlebars.register_template_string("t0", t0).is_ok());
+        assert!(handlebars.register_template_string("t1", t1).is_ok());
+
+        let r0 = handlebars.render("t0", &true);
+        assert!(r0.is_err());
+    }
+
+    #[test]
+    fn test_issue_143() {
+        let main_template = "one{{> two }}three{{> two }}";
+        let two_partial = "--- two ---";
+
+        let mut handlebars = Registry::new();
+        assert!(handlebars
+            .register_template_string("template", main_template)
+            .is_ok());
+        assert!(handlebars
+            .register_template_string("two", two_partial)
+            .is_ok());
+
+        let r0 = handlebars.render("template", &true);
+        assert_eq!(r0.ok().unwrap(), "one--- two ---three--- two ---");
+    }
+
+    #[test]
+    fn test_hash_context_outscope() {
+        let main_template = "In: {{> p a=2}} Out: {{a}}";
+        let p_partial = "{{a}}";
+
+        let mut handlebars = Registry::new();
+        assert!(handlebars
+            .register_template_string("template", main_template)
+            .is_ok());
+        assert!(handlebars.register_template_string("p", p_partial).is_ok());
+
+        let r0 = handlebars.render("template", &true);
+        assert_eq!(r0.ok().unwrap(), "In: 2 Out: ");
+    }
+
+    #[test]
+    fn test_partial_context_hash() {
+        let mut hbs = Registry::new();
+        hbs.register_template_string("one", "This is a test. {{> two name=\"fred\" }}")
+            .unwrap();
+        hbs.register_template_string("two", "Lets test {{name}}")
+            .unwrap();
+        assert_eq!(
+            "This is a test. Lets test fred",
+            hbs.render("one", &0).unwrap()
+        );
+    }
+
+    #[test]
+    fn test_partial_subexpression_context_hash() {
+        let mut hbs = Registry::new();
+        hbs.register_template_string("one", "This is a test. {{> (x @root) name=\"fred\" }}")
+            .unwrap();
+        hbs.register_template_string("two", "Lets test {{name}}")
+            .unwrap();
+
+        hbs.register_helper(
+            "x",
+            Box::new(
+                |_: &Helper<'_, '_>,
+                 _: &Registry<'_>,
+                 _: &Context,
+                 _: &mut RenderContext<'_, '_>,
+                 out: &mut dyn Output|
+                 -> Result<(), RenderError> {
+                    out.write("two")?;
+                    Ok(())
+                },
+            ),
+        );
+        assert_eq!(
+            "This is a test. Lets test fred",
+            hbs.render("one", &0).unwrap()
+        );
+    }
+
+    #[test]
+    fn test_nested_partial_scope() {
+        let t = "{{#*inline \"pp\"}}{{a}} {{b}}{{/inline}}{{#each c}}{{> pp a=2}}{{/each}}";
+        let data = json!({"c": [{"b": true}, {"b": false}]});
+
+        let mut handlebars = Registry::new();
+        assert!(handlebars.register_template_string("t", t).is_ok());
+        let r0 = handlebars.render("t", &data);
+        assert_eq!(r0.ok().unwrap(), "2 true2 false");
+    }
+
+    #[test]
+    fn test_nested_partials() {
+        let mut handlebars = Registry::new();
+        let template1 = "<outer>{{> @partial-block }}</outer>";
+        let template2 = "{{#> t1 }}<inner>{{> @partial-block }}</inner>{{/ t1 }}";
+        let template3 = "{{#> t2 }}Hello{{/ t2 }}";
+
+        handlebars
+            .register_template_string("t1", &template1)
+            .unwrap();
+        handlebars
+            .register_template_string("t2", &template2)
+            .unwrap();
+
+        let page = handlebars.render_template(&template3, &json!({})).unwrap();
+        assert_eq!("<outer><inner>Hello</inner></outer>", page);
+    }
+
+    #[test]
+    fn test_up_to_partial_level() {
+        let outer = r#"{{>inner name="fruit:" vegetables=fruits}}"#;
+        let inner = "{{#each vegetables}}{{../name}} {{this}},{{/each}}";
+
+        let data = json!({ "fruits": ["carrot", "tomato"] });
+
+        let mut handlebars = Registry::new();
+        handlebars.register_template_string("outer", outer).unwrap();
+        handlebars.register_template_string("inner", inner).unwrap();
+
+        assert_eq!(
+            handlebars.render("outer", &data).unwrap(),
+            "fruit: carrot,fruit: tomato,"
+        );
+    }
+}