Refactor: move typesetting logic into their own modules

1 files changed, 53 insertions, 0 deletions

diff --git a/src/typeset.rs b/src/typeset.rs
new file mode 100644
index 0000000..6b83d51
--- /dev/null
+++ b/src/typeset.rs
@@ -0,0 +1,53 @@
+use pandoc_ast::{Block, Inline};
+use crate::parser::parse_scenario_snippet;
+
+
+/// Typeset an error from dot as a Pandoc AST Block element.
+pub fn error(err: Box<dyn std::error::Error>) -> Block {
+    let msg = format!("ERROR: {}", err.to_string());
+    let msg = Inline::Str(msg);
+    let msg = Inline::Strong(vec![msg]);
+    Block::Para(vec![msg])
+}
+
+
+/// Typeset a scenario snippet as a Pandoc AST Block.
+///
+/// The snippet is given as a text string, which is parsed. It need
+/// not be a complete scenario, but it should consist of complete steps.
+pub fn scenario_snippet(snippet: &str) -> Block {
+    let steps = parse_scenario_snippet(snippet)
+        .map(|s| step(s))
+        .collect();
+    Block::LineBlock(steps)
+}
+
+// Typeset a single scenario step as a sequence of Pandoc AST Inlines.
+fn step(text: &str) -> Vec<Inline> {
+    let mut words = text.split_whitespace();
+    let mut inlines = Vec::new();
+
+    if let Some(keyword) = words.next() {
+        typeset_keyword(keyword, &mut inlines);
+        inlines.push(typeset_str(" "));
+    }
+
+    for word in words {
+        inlines.push(typeset_str(word));
+        inlines.push(typeset_str(" "));
+    }
+    inlines
+}
+
+// Typeset first word, which is assumed to be a keyword, of a scenario
+// step.
+fn typeset_keyword(word: &str, inlines: &mut Vec<Inline>) {
+    let word = typeset_str(word);
+    let emph = Inline::Emph(vec![word]);
+    inlines.push(emph);
+}
+
+// Typeset a single inline string as an Inline element.
+fn typeset_str(s: &str) -> Inline {
+    Inline::Str(s.to_string())
+}