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Fix panic on ctrl-w empty document

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This commit is contained in:
Ivan Tham 2021-06-08 21:50:33 +08:00 committed by Blaž Hrastnik
parent 83723957fe
commit 5e2ba28e0e
1 changed files with 5 additions and 2 deletions
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7
helix-core/src/words.rs
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@ -25,7 +25,7 @@ pub fn nth_prev_word_boundary(slice: RopeSlice, mut char_idx: usize, count: usiz
}
}
if with_end {
if with_end || char_idx == 0 {
char_idx
} else {
char_idx + 1
@ -37,7 +37,7 @@ fn different_prev_word_boundary() {
use ropey::Rope;
let t = |x, y| {
let text = Rope::from(x);
let out = nth_prev_word_boundary(text.slice(..), text.len_chars() - 1, 1);
let out = nth_prev_word_boundary(text.slice(..), text.len_chars().saturating_sub(1), 1);
assert_eq!(text.slice(..out), y, r#"from "{}""#, x);
};
t("abcd\nefg\nwrs", "abcd\nefg\n");
@ -47,6 +47,7 @@ fn different_prev_word_boundary() {
t("hello, world", "hello, ");
t("hello, ", "hello");
t("hello", "");
t(",", "");
t("こんにちは、世界！", "こんにちは、世界");
t("こんにちは、世界", "こんにちは、");
t("こんにちは、", "こんにちは");
@ -56,10 +57,12 @@ fn different_prev_word_boundary() {
t("お前はもう死んでいる", "");
t("その300円です", ""); // TODO: should stop at 300
t("唱k", ""); // TODO: should stop at 唱
t("，", "");
t("1 + 1 = 2", "1 + 1 = ");
t("1 + 1 =", "1 + 1 ");
t("1 + 1", "1 + ");
t("1 + ", "1 ");
t("1 ", "");
t("1+1=2", "1+1=");
t("", "");
}