--- /dev/null
+// TAKEN FROM PAGE. Need to move to a common source.
+ pub fn parse(source: &str) -> String {
+
+ let lines = source.split("\n");
+ let mut is_preformatted = false;
+
+ let mut block_label: Option<String> = None;
+ let mut html: String = "".to_owned();
+ let mut current_line_type: Option<LineType> = None;
+
+ let mut heading_stack: Vec<u8> = Vec::new();
+ for line in lines {
+ let mut line_type = LineType::Blank;
+ if line.char_indices().count() > 2 {
+ let mut end = line.len();
+ if line.char_indices().count() > 3 {
+ end = line.char_indices().map(|(i, _)| i).nth(3).unwrap();
+ }
+ line_type = identify_line(&line[..end], is_preformatted);
+ }
+ match line_type {
+ LineType::PreformattedToggle => {
+ is_preformatted = !is_preformatted;
+ if is_preformatted && line.char_indices().count() > 3 {
+ block_label = Some(get_partial_line_content(&line_type, line));
+ } else {
+ block_label = None;
+ }
+ },
+ _ => {
+ // Close previous block if needed
+ if let Some(line) = ¤t_line_type {
+ if line != &line_type && is_block(line) {
+ html.push_str(get_line_closer(line));
+ }
+ }
+
+ // Blocks
+ if is_block(&line_type) {
+ if let Some(line) = ¤t_line_type {
+ if line != &line_type {
+ html.push_str(&get_line_opener(&line_type, block_label.as_ref()));
+ }
+ } else {
+ html.push_str(&get_line_opener(&line_type, None));
+ }
+
+ let line_content = get_partial_line_content(&line_type, line);
+ html.push_str(&line_content);
+ } else {
+ html.push_str(&get_heading_wrapper(&mut heading_stack, &line_type));
+ html.push_str(&get_full_line_content(&line_type, line));
+ }
+ current_line_type = Some(line_type);
+ },
+ }
+ }
+ if let Some(line) = ¤t_line_type {
+ if is_block(line) {
+ html.push_str(get_line_closer(line));
+ }
+ }
+ html.push_str(&close_heading_wrapper(&mut heading_stack));
+ html
+}
+
+fn is_block(line_type: &LineType) -> bool {
+ return match line_type {
+ LineType::PreformattedText | LineType::ListItem | LineType::Quote => true,
+ _ => false,
+ }
+}
+
+fn get_partial_line_content(line_type: &LineType, line: &str) -> String {
+ let encoded_line = line.replace("<", "<").replace(">", ">");
+ return match line_type {
+ LineType::ListItem => format!("<li>{}</li>", encoded_line[2..].trim()),
+ LineType::Quote => encoded_line[1..].trim().to_string(),
+ LineType::PreformattedText => format!("{}\n", encoded_line),
+ LineType::PreformattedToggle => encoded_line[3..].trim().to_string(),
+ _ => "".to_string(),
+ }
+}
+
+fn get_full_line_content(line_type: &LineType, line: &str) -> String {
+ let encoded_line = line.replace("<", "<").replace(">", ">");
+ match line_type {
+ LineType::Text => format!("<p>{}</p>\n", encoded_line.trim()),
+ LineType::Blank => "<br>\n".to_string(),
+ LineType::Link => {
+ let url = get_link_address(line);
+ if url.starts_with("gemini:") {
+ format!("<div><a href=\"{}\">{}</a></div>\n", url, get_link_content(line))
+ } else {
+ format!("<div><a href=\"{}\">{}</a></div>\n", url.replace(".gmi", ".html"), get_link_content(line))
+ }
+ },
+ LineType::Heading1 => format!("<h1>{}</h1>\n", encoded_line[1..].trim()),
+ LineType::Heading2 => format!("<h2>{}</h2>\n", encoded_line[2..].trim()),
+ LineType::Heading3 => format!("<h3>{}</h3>\n", encoded_line[3..].trim()),
+ _ => "".to_string(),
+ }
+}
+
+fn get_heading_wrapper(heading_stack: &mut Vec<u8>, line_type: &LineType) -> String {
+ let mut string = String::new();
+ let current_heading: u8 = match line_type {
+ LineType::Heading1 => 1,
+ LineType::Heading2 => 2,
+ LineType::Heading3 => 3,
+ _ => 255
+ };
+
+ if current_heading < 255 {
+ while let Some(open_heading) = heading_stack.pop() {
+ // You just encountered a more important heading.
+ // Put it back. Desist.
+ if open_heading < current_heading {
+ heading_stack.push(open_heading);
+ break;
+ }
+
+ string.push_str("</div>");
+
+ if open_heading == current_heading {
+ break;
+ }
+ }
+ heading_stack.push(current_heading);
+ string.push_str(&format!("<div class=\"h{}\">", current_heading));
+ }
+
+ return string;
+}
+
+fn close_heading_wrapper(heading_stack: &mut Vec<u8>) -> String {
+ let mut string = String::new();
+ while let Some(_open_heading) = heading_stack.pop() {
+ string.push_str("</div>");
+ }
+ return string;
+}
+
+fn get_line_opener(line_type: &LineType, block_label: Option<&String>) -> String {
+ match line_type {
+ LineType::ListItem => "<ul>".to_string(),
+ LineType::Quote => "<blockquote>".to_string(),
+ LineType::PreformattedText => {
+ if let Some(label) = &block_label {
+ return format!("<pre role=\"img\" aria-label=\"{}\">", label);
+ } else {
+ return "<pre>".to_string();
+ }
+ },
+ _ => "".to_string(),
+ }
+}
+
+fn get_line_closer(line_type: &LineType) -> &'static str {
+ match line_type {
+ LineType::ListItem => "</ul>\n",
+ LineType::Quote => "</blockquote>\n",
+ LineType::PreformattedText => "</pre>\n",
+ _ => "",
+ }
+}
+
+fn get_link_content(line: &str) -> &str {
+ let components: Vec<&str> = line[2..].trim().splitn(2, " ").collect();
+ if components.len() > 1 {
+ return components[1].trim()
+ }
+ components[0].trim()
+}
+
+fn get_link_address(line: &str) -> &str {
+ let components: Vec<&str> = line[2..].trim().splitn(2, " ").collect();
+ components[0].trim()
+}
+
+fn identify_line(line: &str, is_preformatted: bool) -> LineType {
+ if line.starts_with("```") {
+ return LineType::PreformattedToggle;
+ }
+ if is_preformatted {
+ return LineType::PreformattedText;
+ }
+ if line.is_empty() {
+ return LineType::Blank;
+ }
+ if line.starts_with("=>") {
+ return LineType::Link;
+ }
+ if line.starts_with("* ") {
+ return LineType::ListItem;
+ }
+ if line.starts_with(">") {
+ return LineType::Quote;
+ }
+ if line.starts_with("###") {
+ return LineType::Heading3;
+ }
+ if line.starts_with("##") {
+ return LineType::Heading2;
+ }
+ if line.starts_with("#") {
+ return LineType::Heading1;
+ }
+
+ LineType::Text
+}
+
+#[derive(PartialEq, Eq)]
+enum LineType {
+ Text,
+ Blank,
+ Link,
+ PreformattedToggle,
+ PreformattedText,
+ Heading1,
+ Heading2,
+ Heading3,
+ ListItem,
+ Quote
+}
git.r.bdr.sh / rbdr / blog / blobdiff