Add trimming option for the de::from_* functions

src/de/mod.rs

@@ -1852,7 +1852,7 @@ use std::io::BufRead;
 use std::mem::replace;
 #[cfg(feature = "overlapped-lists")]
 use std::num::NonZeroUsize;
-use std::ops::Deref;
+use std::ops::{Deref, Range};
 
 /// Data represented by a text node or a CDATA node. XML markup is not expected
 pub(crate) const TEXT_KEY: &str = "$text";
@@ -1869,7 +1869,24 @@ pub(crate) const VALUE_KEY: &str = "$value";
 /// [`PI`]: Event::PI
 #[derive(Debug, PartialEq, Eq)]
 pub struct Text<'a> {
+ /// Untrimmed text after concatenating content of all
+ /// [`Text`] and [`CData`] events
  text: Cow<'a, str>,
+ /// A range into `text` which contains data after trimming
+ content: Range<usize>,
+}
+
+impl<'a> Text<'a> {
+ fn new(text: Cow<'a, str>) -> Self {
+ let start = text.find(|c| !char::is_whitespace(c)).unwrap_or(0);
+ let end = text
+ .rfind(|c| !char::is_whitespace(c))
+ .unwrap_or(text.len().saturating_sub(1));
+ Self {
+ text,
+ content: start..end,
+ }
+ }
 }
 
 impl<'a> Deref for Text<'a> {
@@ -1884,9 +1901,7 @@ impl<'a> Deref for Text<'a> {
 impl<'a> From<&'a str> for Text<'a> {
  #[inline]
  fn from(text: &'a str) -> Self {
- Self {
- text: Cow::Borrowed(text),
- }
+ Self::new(Cow::Borrowed(text))
  }
 }
 
@@ -2010,7 +2025,7 @@ impl<'i, R: XmlRead<'i>> XmlReader<'i, R> {
  _ => break,
  }
  }
- Ok(DeEvent::Text(Text { text: result }))
+ Ok(DeEvent::Text(Text::new(result)))
  }
 
  /// Read one text event, panics if current event is not a text event