60 lines
1.4 KiB
Rust
60 lines
1.4 KiB
Rust
use serde::de::Error as SerdeError;
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use serde::{Deserialize, Deserializer};
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use alacritty_config_derive::{ConfigDeserialize, SerdeReplace};
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/// Maximum scrollback amount configurable.
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pub const MAX_SCROLLBACK_LINES: u32 = 100_000;
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/// Struct for scrolling related settings.
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#[derive(ConfigDeserialize, Copy, Clone, Debug, PartialEq, Eq)]
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pub struct Scrolling {
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pub multiplier: u8,
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history: ScrollingHistory,
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}
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impl Default for Scrolling {
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fn default() -> Self {
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Self { multiplier: 3, history: Default::default() }
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}
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}
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impl Scrolling {
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pub fn history(self) -> u32 {
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self.history.0
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}
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// Update the history size, used in ref tests.
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pub fn set_history(&mut self, history: u32) {
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self.history = ScrollingHistory(history);
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}
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}
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#[derive(SerdeReplace, Copy, Clone, Debug, PartialEq, Eq)]
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struct ScrollingHistory(u32);
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impl Default for ScrollingHistory {
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fn default() -> Self {
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Self(10_000)
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}
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}
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impl<'de> Deserialize<'de> for ScrollingHistory {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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let lines = u32::deserialize(deserializer)?;
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if lines > MAX_SCROLLBACK_LINES {
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Err(SerdeError::custom(format!(
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"exceeded maximum scrolling history ({}/{})",
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lines, MAX_SCROLLBACK_LINES
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)))
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} else {
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Ok(Self(lines))
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}
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}
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}
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