1 files changed, 78 insertions, 0 deletions
diff --git a/src/syntax/markup.rs b/src/syntax/markup.rs
new file mode 100644
index 00000000..09a37116
--- /dev/null
+++ b/src/syntax/markup.rs
@@ -0,0 +1,78 @@
+use super::{Expr, Ident, Span};
+use crate::util::EcoString;
+
+/// The syntactical root capable of representing a full parsed document.
+pub type Markup = Vec<MarkupNode>;
+
+/// A single piece of markup.
+#[derive(Debug, Clone, PartialEq)]
+pub enum MarkupNode {
+    /// Whitespace containing less than two newlines.
+    Space,
+    /// A forced line break: `\`.
+    Linebreak(Span),
+    /// A paragraph break: Two or more newlines.
+    Parbreak(Span),
+    /// Strong text was enabled / disabled: `*`.
+    Strong(Span),
+    /// Emphasized text was enabled / disabled: `_`.
+    Emph(Span),
+    /// Plain text.
+    Text(EcoString),
+    /// A raw block with optional syntax highlighting: `` `...` ``.
+    Raw(Box<RawNode>),
+    /// A section heading: `= Introduction`.
+    Heading(Box<HeadingNode>),
+    /// An item in an unordered list: `- ...`.
+    List(Box<ListNode>),
+    /// An item in an enumeration (ordered list): `1. ...`.
+    Enum(Box<EnumNode>),
+    /// An expression.
+    Expr(Expr),
+}
+
+/// A raw block with optional syntax highlighting: `` `...` ``.
+#[derive(Debug, Clone, PartialEq)]
+pub struct RawNode {
+    /// The source code location.
+    pub span: Span,
+    /// An optional identifier specifying the language to syntax-highlight in.
+    pub lang: Option<Ident>,
+    /// The raw text, determined as the raw string between the backticks trimmed
+    /// according to the above rules.
+    pub text: EcoString,
+    /// Whether the element is block-level, that is, it has 3+ backticks
+    /// and contains at least one newline.
+    pub block: bool,
+}
+
+/// A section heading: `= Introduction`.
+#[derive(Debug, Clone, PartialEq)]
+pub struct HeadingNode {
+    /// The source code location.
+    pub span: Span,
+    /// The section depth (numer of equals signs).
+    pub level: usize,
+    /// The contents of the heading.
+    pub body: Markup,
+}
+
+/// An item in an unordered list: `- ...`.
+#[derive(Debug, Clone, PartialEq)]
+pub struct ListNode {
+    /// The source code location.
+    pub span: Span,
+    /// The contents of the list item.
+    pub body: Markup,
+}
+
+/// An item in an enumeration (ordered list): `1. ...`.
+#[derive(Debug, Clone, PartialEq)]
+pub struct EnumNode {
+    /// The source code location.
+    pub span: Span,
+    /// The number, if any.
+    pub number: Option<usize>,
+    /// The contents of the list item.
+    pub body: Markup,
+}