Wrap headings, fix empty lines

[rbdr/page] / src / gemini_parser.rs

diff --git a/src/gemini_parser.rs b/src/gemini_parser.rs
index 36abb169ed5788bfc5c1a4cfc82a8cd642ff5d78..e63ebd30344dccdfe22e06eaeba3f0cb4fefd2de 100644 (file)
--- a/src/gemini_parser.rs
+++ b/src/gemini_parser.rs
@@ -6,8 +6,16 @@ pub fn parse(source: &str) -> String {
     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 line_type = identify_line(&(line[..3]), is_preformatted);
+        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,
             _ => {
@@ -31,8 +39,8 @@ pub fn parse(source: &str) -> String {
                     let line_content = get_partial_line_content(&line_type, line);
                     html.push_str(&line_content);
                 } else {
-                    let line_content = get_full_line_content(&line_type, line);
-                    html.push_str(&line_content);
+                    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);
             },
@@ -43,39 +51,86 @@ pub fn parse(source: &str) -> String {
             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 => true,
-        LineType::ListItem => true,
-        LineType::Quote => true,
+        LineType::PreformattedText | LineType::ListItem | LineType::Quote => true,
         _ => false,
     }
 }
 
 fn get_partial_line_content(line_type: &LineType, line: &str) -> String {
+    let encoded_line = line.replace("<", "&lt;").replace(">", "&gt;");
     return match line_type {
-        LineType::ListItem => format!("<li>{}</li>", line[2..].trim()),
-        LineType::Quote => line[1..].trim().to_string(),
-        LineType::PreformattedText => format!("{}\n", line),
+        LineType::ListItem => format!("<li>{}</li>", encoded_line[2..].trim()),
+        LineType::Quote => encoded_line[1..].trim().to_string(),
+        LineType::PreformattedText => format!("{}\n", encoded_line),
         _ => "".to_string(),
     }
 }
 
 fn get_full_line_content(line_type: &LineType, line: &str) -> String {
+    let encoded_line = line.replace("<", "&lt;").replace(">", "&gt;");
      match line_type {
-        LineType::Text => format!("<p>{}</p>\n", line.trim()),
+        LineType::Text => format!("<p>{}</p>\n", encoded_line.trim()),
         LineType::Blank => "<br/>\n".to_string(),
-        LineType::Link => format!("<div><a href=\"{}\">{}</a></div>\n", get_link_address(line), get_link_content(line)),
-        LineType::Heading1 => format!("<h1>{}</h1>\n", line[1..].trim()),
-        LineType::Heading2 => format!("<h2>{}</h2>\n", line[2..].trim()),
-        LineType::Heading3 => format!("<h3>{}</h3>\n", line[3..].trim()),
+        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) -> &'static str {
     match line_type {
         LineType::ListItem => "<ul>",