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Refactor write_snippet

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This commit is contained in:
Sinh Pham 2015-10-17 11:35:47 -07:00
parent 00aa232834
commit 82a6cca010
1 changed files with 10 additions and 31 deletions
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41
src/missed_spans.rs
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@ -59,43 +59,22 @@ fn format_missing_inner<F: Fn(&mut FmtVisitor, &str, &str)>(&mut self,
let span = codemap::mk_sp(start, end);
let snippet = self.snippet(span);
self.write_snippet(&snippet, true, &process_last_snippet);
self.write_snippet(&snippet, &process_last_snippet);
}
fn write_snippet<F: Fn(&mut FmtVisitor, &str, &str)>(&mut self,
snippet: &str,
last_snippet: bool,
process_last_snippet: F) {
// Trim whitespace from the right hand side of each line.
// Annoyingly, the library functions for splitting by lines etc. are not
// quite right, so we must do it ourselves.
let mut line_start = 0;
let mut last_wspace = None;
for (i, c) in snippet.char_indices() {
if c == '\n' {
if let Some(lw) = last_wspace {
self.buffer.push_str(&snippet[line_start..lw]);
self.buffer.push_str("\n");
} else {
self.buffer.push_str(&snippet[line_start..i + 1]);
}
line_start = i + 1;
last_wspace = None;
} else {
if c.is_whitespace() {
if last_wspace.is_none() {
last_wspace = Some(i);
}
} else {
last_wspace = None;
}
}
}
if last_snippet {
process_last_snippet(self, &snippet[line_start..], snippet);
let mut lines: Vec<&str> = snippet.lines().collect();
let last_snippet = if snippet.ends_with("\n") {
""
} else {
self.buffer.push_str(&snippet[line_start..]);
lines.pop().unwrap()
};
for line in lines.iter() {
self.buffer.push_str(line.trim_right());
self.buffer.push_str("\n");
}
process_last_snippet(self, &last_snippet, snippet);
}
}