74 lines
2.3 KiB
Rust
74 lines
2.3 KiB
Rust
use crate::theme::Settings;
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use std::path::Path;
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const SETTINGS_FILE: &str = "settings.json";
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pub fn settings_dir() -> std::path::PathBuf {
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if let Ok(exe) = std::env::current_exe() {
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if let Some(dir) = exe.parent() {
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return dir.to_path_buf();
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}
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}
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std::path::PathBuf::from(".")
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}
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pub fn save_settings(dir: &Path, settings: &Settings) -> Result<(), String> {
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let path = dir.join(SETTINGS_FILE);
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let json = serde_json::to_string_pretty(settings)
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.map_err(|e| format!("序列化设置失败: {}", e))?;
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std::fs::write(&path, json)
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.map_err(|e| format!("保存设置失败: {}", e))?;
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Ok(())
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}
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pub fn load_settings(dir: &Path) -> Result<Settings, String> {
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let path = dir.join(SETTINGS_FILE);
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let json = std::fs::read_to_string(&path)
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.map_err(|e| format!("读取设置失败: {}", e))?;
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let mut settings: Settings = serde_json::from_str(&json)
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.map_err(|e| format!("解析设置失败: {}", e))?;
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// Always refresh profiles from code-defined presets so that updated
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// preset values (font size, spacing, etc.) take effect even when
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// an older settings.json is present on disk.
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let preset_names: Vec<String> = crate::style::StyleProfile::presets()
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.iter()
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.map(|p| p.name.clone())
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.collect();
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settings.profiles = crate::style::StyleProfile::presets();
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if !preset_names.contains(&settings.active_profile) {
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settings.active_profile = "Kindle 默认".into();
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}
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Ok(settings)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::theme::{Settings, Theme};
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#[test]
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fn test_save_and_load_settings() {
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let dir = std::env::temp_dir().join("epub-read-test");
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let _ = std::fs::create_dir_all(&dir);
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let mut s = Settings::default();
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s.font_size = 24.0;
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s.theme = Theme::Dark;
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save_settings(&dir, &s).unwrap();
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let loaded = load_settings(&dir).unwrap();
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assert_eq!(loaded.font_size, 24.0);
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assert_eq!(loaded.theme, Theme::Dark);
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let _ = std::fs::remove_dir_all(&dir);
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}
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#[test]
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fn test_load_settings_nonexistent() {
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let dir = std::env::temp_dir().join("epub-read-test-nonexistent");
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let _ = std::fs::remove_dir_all(&dir);
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let result = load_settings(&dir);
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assert!(result.is_err());
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}
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}
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