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Use iterator methods to make auto-detect code a little cleaner.

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Also use chars instead of graphemes for indent detection code.
Graphemes are slower, and don't provide any benefit there.
This commit is contained in:
Nathan Vegdahl 2018-01-01 14:06:17 -08:00
parent 7121469cba
commit 020827806b
1 changed files with 12 additions and 26 deletions
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38
src/editor/mod.rs
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@ -94,9 +94,8 @@ impl<T: LineFormatter> Editor<T> {
pub fn auto_detect_line_ending(&mut self) {
let mut line_ending_histogram: [usize; 8] = [0, 0, 0, 0, 0, 0, 0, 0];
// Collect statistics
let mut line_i: usize = 0;
for line in self.buffer.line_iter() {
// Collect statistics on the first 100 lines
for line in self.buffer.line_iter().take(100) {
// Get the line ending
let ending = if line.len_chars() == 1 {
let g = line.slice(line.len_chars() - 1, line.len_chars())
@ -142,12 +141,6 @@ impl<T: LineFormatter> Editor<T> {
line_ending_histogram[7] += 1;
}
}
// Stop after 100 lines
line_i += 1;
if line_i > 100 {
break;
}
}
// Analyze stats and make a determination
@ -183,16 +176,15 @@ impl<T: LineFormatter> Editor<T> {
let mut last_indent = (false, 0usize); // (was_tabs, indent_count)
// Collect statistics
let mut line_i: usize = 0;
for line in self.buffer.line_iter() {
let mut g_iter = line.graphemes();
match g_iter.next() {
Some("\t") => {
// Collect statistics on the first 1000 lines
for line in self.buffer.line_iter().take(1000) {
let mut c_iter = line.chars();
match c_iter.next() {
Some('\t') => {
// Count leading tabs
let mut count = 1;
for g in g_iter {
if g == "\t" {
for c in c_iter {
if c == '\t' {
count += 1;
} else {
break;
@ -208,11 +200,11 @@ impl<T: LineFormatter> Editor<T> {
last_indent = (true, count);
}
Some(" ") => {
Some(' ') => {
// Count leading spaces
let mut count = 1;
for g in g_iter {
if g == " " {
for c in c_iter {
if c == ' ' {
count += 1;
} else {
break;
@ -236,12 +228,6 @@ impl<T: LineFormatter> Editor<T> {
_ => {}
}
// Stop after 1000 lines
line_i += 1;
if line_i > 1000 {
break;
}
}
// Analyze stats and make a determination