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fix: fix cursor position when cursor is at the end of the commandline (#9030)

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# Description
Fix getting the cursor position, when it's at the end of the
commandline.

# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->

# Tests + Formatting

# After Submitting
This commit is contained in:
Steven Xu 2023-04-28 22:02:45 +10:00 committed by GitHub
parent 3076378373
commit b37662c7e1
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 29 additions and 8 deletions
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3
crates/nu-cli/src/commands/commandline.rs
View File

@ -118,8 +118,9 @@ impl Command for Commandline {
.expect("repl cursor pos mutex");
let char_pos = buffer
.grapheme_indices(true)
.chain(std::iter::once((*cursor_pos, "")))
.position(|(i, _c)| i == *cursor_pos)
.unwrap_or(buffer.len());
.expect("Cursor position isn't on a grapheme boundary");
Ok(Value::String {
val: char_pos.to_string(),
span: call.head,

34
src/tests/test_commandline.rs
View File

@ -47,14 +47,14 @@ fn commandline_test_replace() -> TestResult {
fn commandline_test_cursor() -> TestResult {
run_test(
"commandline --replace '0👩‍❤️‍👩2'\n\
commandline --cursor '1' \n\
commandline --cursor '1'\n\
commandline --insert 'x'\n\
commandline",
"0x👩‍❤️‍👩2",
)?;
run_test(
"commandline --replace '0👩‍❤️‍👩2'\n\
commandline --cursor '2' \n\
commandline --cursor '2'\n\
commandline --insert 'x'\n\
commandline",
"0👩‍❤️‍👩x2",
@ -62,16 +62,36 @@ fn commandline_test_cursor() -> TestResult {
}
#[test]
fn commandline_test_cursor_show_pos() -> TestResult {
fn commandline_test_cursor_show_pos_begin() -> TestResult {
run_test(
"commandline --replace '0👩‍❤️‍👩'\n\
commandline --cursor '0'\n\
commandline --cursor",
"0",
)
}
#[test]
fn commandline_test_cursor_show_pos_end() -> TestResult {
run_test(
"commandline --replace '0👩‍❤️‍👩'\n\
commandline --cursor '2'\n\
commandline --cursor",
"2",
)
}
#[test]
fn commandline_test_cursor_show_pos_mid() -> TestResult {
run_test(
"commandline --replace '0👩‍❤️‍👩2'\n\
commandline --cursor '1' \n\
commandline --cursor '1'\n\
commandline --cursor",
"1",
)?;
run_test(
"commandline --replace '0👩‍❤️‍👩2'\n\
commandline --cursor '2' \n\
commandline --cursor '2'\n\
commandline --cursor",
"2",
)
@ -81,7 +101,7 @@ fn commandline_test_cursor_show_pos() -> TestResult {
fn commandline_test_cursor_too_small() -> TestResult {
run_test(
"commandline --replace '123456'\n\
commandline --cursor '-1' \n\
commandline --cursor '-1'\n\
commandline --insert '0'\n\
commandline",
"0123456",
@ -92,7 +112,7 @@ fn commandline_test_cursor_too_small() -> TestResult {
fn commandline_test_cursor_too_large() -> TestResult {
run_test(
"commandline --replace '123456'\n\
commandline --cursor '10' \n\
commandline --cursor '10'\n\
commandline --insert '0'\n\
commandline",
"1234560",