add quote support

src/app/browser/window/tab/item/page/content/text/markdown.rs

@@ -112,6 +112,7 @@ impl Markdown {
         // * keep in order!
 
         tag::header(&buffer, &tag);
+        tag::quote(&buffer, &tag);
 
         reference::image_link(&buffer, &tag, base, &link_color.0, &mut links);
         reference::image(&buffer, &tag, base, &link_color.0, &mut links);

src/app/browser/window/tab/item/page/content/text/markdown/tag.rs

@@ -131,3 +131,43 @@ fn test_regex_header() {
     assert_eq!(&first["level"], "##");
     assert_eq!(&first["title"], "Title ![alt](https://link.com)");
 }
+
+// Quotes
+
+const REGEX_QUOTE: &str = r"(?m)^>\s+(?P<text>.*)$";
+
+/// Apply quote `Tag` to given `TextBuffer`
+pub fn quote(buffer: &TextBuffer, tag: &Tag) {
+    let (start, end) = buffer.bounds();
+    let full_content = buffer.text(&start, &end, true).to_string();
+
+    let matches: Vec<_> = Regex::new(REGEX_QUOTE)
+        .unwrap()
+        .captures_iter(&full_content)
+        .collect();
+
+    for cap in matches.into_iter().rev() {
+        let full_match = cap.get(0).unwrap();
+
+        let start_char_offset = full_content[..full_match.start()].chars().count() as i32;
+        let end_char_offset = full_content[..full_match.end()].chars().count() as i32;
+
+        let mut start_iter = buffer.iter_at_offset(start_char_offset);
+        let mut end_iter = buffer.iter_at_offset(end_char_offset);
+
+        buffer.delete(&mut start_iter, &mut end_iter);
+        buffer.insert_with_tags(&mut start_iter, &cap["text"], &[&tag.quote])
+    }
+}
+
+#[test]
+fn test_regex_quote() {
+    let cap: Vec<_> = Regex::new(REGEX_QUOTE)
+        .unwrap()
+        .captures_iter(r"> Some quote with ![img](https://link.com)")
+        .collect();
+
+    let first = cap.get(0).unwrap();
+    assert_eq!(&first[0], "> Some quote with ![img](https://link.com)");
+    assert_eq!(&first["text"], "Some quote with ![img](https://link.com)");
+}

src/app/browser/window/tab/item/page/content/text/markdown/tag/quote.rs

@@ -1,4 +1,4 @@
-use gtk::{TextTag, WrapMode};
+use gtk::{TextTag, WrapMode::Word, pango::Style::Italic};
 
 pub trait Quote {
     fn quote() -> Self;
@@ -8,7 +8,8 @@ impl Quote for TextTag {
     fn quote() -> Self {
         TextTag::builder()
             .left_margin(28)
-            .wrap_mode(WrapMode::Word)
+            .wrap_mode(Word)
+            .style(Italic) // what about the italic tags decoration? @TODO
             .build()
     }
 }