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feat(calc): Inform user if qalc is not installed

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This commit is contained in:
Michael Aaron Murphy 2021-10-06 17:06:51 +02:00 • committed by Michael Murphy
parent 6cdf2987a9
commit bb4440e8a3
1 changed files with 65 additions and 50 deletions
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115
plugins/src/calc/mod.rs
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@ -107,13 +107,23 @@ async fn qcalc(regex: &mut Regex, expression: &str, decimal_comma: bool) -> Opti
command.args(&["-set", "decimal comma on"]);
}
let mut child = command
let spawn = command
.env("LANG", "C")
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::null())
.spawn()
.ok()?;
.spawn();
let mut child = match spawn {
Ok(child) => child,
Err(why) => {
return Some(if why.kind() == io::ErrorKind::NotFound {
String::from("qalc command is not installed")
} else {
format!("qalc command failed to spawn: {}", why)
})
}
};
if let Some(mut stdin) = child.stdin.take() {
let _ = stdin
@ -121,68 +131,73 @@ async fn qcalc(regex: &mut Regex, expression: &str, decimal_comma: bool) -> Opti
.await;
}
if let Some(stdout) = child.stdout.take() {
let mut reader = smol::io::BufReader::new(stdout).lines().skip(2);
let mut output = String::new();
let stdout = match child.stdout.take() {
Some(stdout) => stdout,
None => {
return Some(String::from(
"qalc lacks stdout pipe: did you get hit by a cosmic ray?",
));
}
};
fn has_issue(line: &str) -> bool {
line.starts_with("error") || line.starts_with("warning")
let mut reader = smol::io::BufReader::new(stdout).lines().skip(2);
let mut output = String::new();
fn has_issue(line: &str) -> bool {
line.starts_with("error") || line.starts_with("warning")
}
while let Some(Ok(line)) = reader.next().await {
let line = line.trim();
if line.is_empty() {
break;
}
while let Some(Ok(line)) = reader.next().await {
let line = line.trim();
let normalized = regex.replace_all(line, "");
let mut normalized = normalized.as_ref();
if line.is_empty() {
break;
if has_issue(normalized) {
return None;
} else {
if !output.is_empty() {
output.push(' ');
}
let normalized = regex.replace_all(line, "");
let mut normalized = normalized.as_ref();
if normalized.starts_with('(') {
let mut level = 1;
for (byte_pos, character) in normalized[1..].char_indices() {
if character == '(' {
level += 1;
} else if character == ')' {
level -= 1;
if has_issue(normalized) {
return None;
} else {
if !output.is_empty() {
output.push(' ');
}
if normalized.starts_with('(') {
let mut level = 1;
for (byte_pos, character) in normalized[1..].char_indices() {
if character == '(' {
level += 1;
} else if character == ')' {
level -= 1;
if level == 0 {
normalized = normalized[byte_pos + 2..].trim_start();
break;
}
if level == 0 {
normalized = normalized[byte_pos + 2..].trim_start();
break;
}
}
}
}
let cut = if let Some(pos) = normalized.find('=') {
pos + 1
} else if let Some(pos) = normalized.find('≈') {
pos + '≈'.len_utf8()
} else {
return None;
};
normalized = normalized[cut..].trim_start();
if normalized.starts_with('(') && normalized.ends_with(')') {
normalized = &normalized[1..normalized.len() - 1];
}
output.push_str(normalized);
let cut = if let Some(pos) = normalized.find('=') {
pos + 1
} else if let Some(pos) = normalized.find('≈') {
pos + '≈'.len_utf8()
} else {
return None;
};
}
return Some(output);
normalized = normalized[cut..].trim_start();
if normalized.starts_with('(') && normalized.ends_with(')') {
normalized = &normalized[1..normalized.len() - 1];
}
output.push_str(normalized);
};
}
None
Some(output)
}
pub async fn uses_decimal_comma() -> bool {