Remove leading blank lines from document contents.

src/parser/document.rs

@@ -181,8 +181,10 @@ fn _document<'b, 'g, 'r, 's>(
     let zeroth_section_matcher = parser_with_context!(zeroth_section)(context);
     let heading_matcher = parser_with_context!(heading(0))(context);
     let (remaining, _blank_lines) = many0(blank_line)(input)?;
+    let contents_begin = remaining;
     let (remaining, zeroth_section) = opt(zeroth_section_matcher)(remaining)?;
     let (remaining, children) = many0(heading_matcher)(remaining)?;
+    let contents = get_consumed(contents_begin, remaining);
     let source = get_consumed(input, remaining);
     Ok((
         remaining,
@@ -192,6 +194,11 @@ fn _document<'b, 'g, 'r, 's>(
             path: None,
             zeroth_section,
             children,
+            contents: if contents.len() > 0 {
+                Some(Into::<&str>::into(contents))
+            } else {
+                None
+            },
         },
     ))
 }

src/types/document.rs

@@ -1,6 +1,5 @@
 use std::path::PathBuf;
 
-use super::remove_trailing::RemoveTrailing;
 use super::Element;
 use super::NodeProperty;
 use super::Object;
@@ -18,6 +17,7 @@ pub struct Document<'s> {
     pub path: Option<PathBuf>,
     pub zeroth_section: Option<Section<'s>>,
     pub children: Vec<Heading<'s>>,
+    pub contents: Option<&'s str>,
 }
 
 #[derive(Debug)]
@@ -63,28 +63,7 @@ impl<'s> StandardProperties<'s> for Document<'s> {
     }
 
     fn get_contents<'b>(&'b self) -> Option<&'s str> {
-        let post_blank = self.get_post_blank();
-        let mut content_lines = self
-            .source
-            .split_inclusive('\n')
-            .remove_trailing(post_blank);
-        let first_line = content_lines.next();
-        let last_line = content_lines.last().or(first_line);
-        match (first_line, last_line) {
-            (None, None) => None,
-            (None, Some(_)) | (Some(_), None) => unreachable!(),
-            (Some(first_line), Some(last_line)) => {
-                let first_line_offset = first_line.as_ptr() as usize;
-                let last_line_offset = last_line.as_ptr() as usize + last_line.len();
-                let source_offset = self.source.as_ptr() as usize;
-                debug_assert!(super::lesser_element::is_slice_of(self.source, first_line));
-                debug_assert!(super::lesser_element::is_slice_of(self.source, last_line));
-                Some(
-                    &self.source[(first_line_offset - source_offset)
-                        ..(last_line_offset - first_line_offset)],
-                )
-            }
-        }
+        self.contents
     }
 
     fn get_post_blank(&self) -> PostBlank {