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use std::{borrow::Cow, rc::Rc};
use crate::lineup::InterlinkSolver;
pub struct Document<'raw> {
pub(crate) nodes: Vec<TreeNode<'raw>>,
pub(crate) solver: Rc<dyn InterlinkSolver>,
}
impl<'raw> Document<'raw> {
pub fn set_interlink_solver(&mut self, solver: Rc<dyn InterlinkSolver>) {
self.solver = solver;
}
pub fn into_html(self) -> String {
TreeNode::html_nodes(&self.nodes, Rc::clone(&self.solver))
}
pub fn as_text(&self) -> String {
TreeNode::text_nodes(&self.nodes, Rc::clone(&self.solver))
}
}
#[derive(Clone, Debug, PartialEq)]
pub enum TreeNode<'raw> {
Text(&'raw str),
Interlink {
children: Vec<TreeNode<'raw>>,
},
Link {
kind: LinkKind,
name: Option<Vec<TreeNode<'raw>>>,
children: Vec<TreeNode<'raw>>,
},
StyledText {
style: NodeStyle,
children: Vec<TreeNode<'raw>>,
},
ColoredText {
color: &'raw str,
children: Vec<TreeNode<'raw>>,
},
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum LinkKind {
External,
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum NodeStyle {
Bold,
Code,
Italic,
}
impl<'raw> TreeNode<'raw> {
pub fn html(&self, solver: Rc<dyn InterlinkSolver>) -> Cow<'raw, str> {
match self {
TreeNode::Text(str) => Cow::Borrowed(str),
TreeNode::Interlink { children } => {
let txt = Self::text_nodes(&children, Rc::clone(&solver));
let title = solver.link_title(&txt);
let location = solver.link_location(&txt);
Cow::Owned(format!("<a href=\"{location}\">{title}</a>"))
}
TreeNode::Link {
kind: _,
name,
children,
} => {
let txt = Self::text_nodes(&children, Rc::clone(&solver));
let title = match name.as_deref() {
None => Cow::Borrowed(txt.as_str()),
Some(name) => {
let txt = Self::text_nodes(name, Rc::clone(&solver));
Cow::Owned(txt)
}
};
let location = txt.as_str();
Cow::Owned(format!("<a href=\"{location}\">{title}</a>"))
}
TreeNode::StyledText { style, children } => {
let (open, close) = match style {
NodeStyle::Bold => ("<b>", "</b>"),
NodeStyle::Code => ("<code>", "</code>"),
NodeStyle::Italic => ("<i>", "</i>"),
};
let inner = Self::html_nodes(children.as_slice(), solver);
Cow::Owned(format!("{open}{inner}{close}"))
}
TreeNode::ColoredText { color, children } => {
let inner = Self::html_nodes(children.as_slice(), solver);
Cow::Owned(format!("<span style='color: {color}'>{inner}</span>"))
}
}
}
pub fn text(&self, solver: Rc<dyn InterlinkSolver>) -> Cow<'raw, str> {
match self {
TreeNode::Text(str) => Cow::Borrowed(str),
TreeNode::Interlink { children } => {
let text = Self::text_nodes(children, Rc::clone(&solver));
Cow::Owned(solver.link_title(&text).into_owned())
}
TreeNode::Link {
kind: _,
name,
children,
} => match name.as_deref() {
None => {
let text = Self::text_nodes(children, Rc::clone(&solver));
Cow::Owned(solver.link_title(&text).into_owned())
}
Some(name) => {
let text = Self::text_nodes(name, Rc::clone(&solver));
Cow::Owned(solver.link_title(&text).into_owned())
}
},
TreeNode::StyledText { style: _, children } => {
Cow::Owned(Self::text_nodes(children, solver))
}
TreeNode::ColoredText { color: _, children } => {
Cow::Owned(Self::text_nodes(children, solver))
}
}
}
fn text_nodes(nodes: &[TreeNode<'raw>], solver: Rc<dyn InterlinkSolver>) -> String {
let mut ret = String::new();
for node in nodes {
let node_txt = &node.text(Rc::clone(&solver));
if !node_txt.is_empty() {
ret.push_str(node_txt);
}
}
ret
}
fn html_nodes(nodes: &[TreeNode<'raw>], solver: Rc<dyn InterlinkSolver>) -> String {
let mut ret = String::new();
for node in nodes {
ret.push_str(&node.html(Rc::clone(&solver)));
}
ret
}
}
|
