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use log::error;
use serde::{Deserialize, Deserializer};
use crate::config::{failure_default, LOG_TARGET_CONFIG, MAX_SCROLLBACK_LINES};
/// Struct for scrolling related settings.
#[serde(default)]
#[derive(Deserialize, Copy, Clone, Default, Debug, PartialEq, Eq)]
pub struct Scrolling {
#[serde(deserialize_with = "failure_default")]
history: ScrollingHistory,
#[serde(deserialize_with = "failure_default")]
multiplier: ScrollingMultiplier,
// TODO: REMOVED
#[serde(deserialize_with = "failure_default")]
pub auto_scroll: Option<bool>,
// TODO: DEPRECATED
#[serde(deserialize_with = "failure_default")]
faux_multiplier: Option<ScrollingMultiplier>,
}
impl Scrolling {
pub fn history(self) -> u32 {
self.history.0
}
pub fn multiplier(self) -> u8 {
self.multiplier.0
}
pub fn faux_multiplier(self) -> Option<u8> {
self.faux_multiplier.map(|sm| sm.0)
}
// Update the history size, used in ref tests.
pub fn set_history(&mut self, history: u32) {
self.history = ScrollingHistory(history);
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, Deserialize)]
struct ScrollingMultiplier(u8);
impl Default for ScrollingMultiplier {
fn default() -> Self {
Self(3)
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
struct ScrollingHistory(u32);
impl Default for ScrollingHistory {
fn default() -> Self {
Self(10_000)
}
}
impl<'de> Deserialize<'de> for ScrollingHistory {
fn deserialize<D>(deserializer: D) -> ::std::result::Result<Self, D::Error>
where
D: Deserializer<'de>,
{
let value = serde_yaml::Value::deserialize(deserializer)?;
match u32::deserialize(value) {
Ok(lines) => {
if lines > MAX_SCROLLBACK_LINES {
error!(
target: LOG_TARGET_CONFIG,
"Problem with config: scrollback size is {}, but expected a maximum of \
{}; using {1} instead",
lines,
MAX_SCROLLBACK_LINES,
);
Ok(ScrollingHistory(MAX_SCROLLBACK_LINES))
} else {
Ok(ScrollingHistory(lines))
}
},
Err(err) => {
error!(
target: LOG_TARGET_CONFIG,
"Problem with config: {}; using default value", err
);
Ok(Default::default())
},
}
}
}
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