StratoSDK is a framework with a declarative approach similar to Flutter/React, written and designed entirely for Rust.
| 1 | use cosmic_text::{fontdb, FontSystem as CosmicFontSystem}; |
| 2 | use serde::{Deserialize, Serialize}; |
| 3 | use std::collections::HashMap; |
| 4 | use std::path::Path; |
| 5 | use sys_locale::get_locale; |
| 6 | |
| 7 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 8 | pub struct FontConfig { |
| 9 | pub safe_fonts: HashMap<String, Vec<String>>, |
| 10 | pub fallback_fonts: Vec<String>, |
| 11 | } |
| 12 | |
| 13 | impl Default for FontConfig { |
| 14 | fn default() -> Self { |
| 15 | let mut safe_fonts = HashMap::new(); |
| 16 | |
| 17 | // Windows safe fonts |
| 18 | safe_fonts.insert( |
| 19 | "windows".to_string(), |
| 20 | vec![ |
| 21 | "segoeui.ttf".to_string(), |
| 22 | "arial.ttf".to_string(), |
| 23 | "tahoma.ttf".to_string(), |
| 24 | "calibri.ttf".to_string(), |
| 25 | "verdana.ttf".to_string(), |
| 26 | ], |
| 27 | ); |
| 28 | |
| 29 | // macOS safe fonts |
| 30 | safe_fonts.insert( |
| 31 | "macos".to_string(), |
| 32 | vec![ |
| 33 | "SF-Pro-Display-Regular.otf".to_string(), |
| 34 | "HelveticaNeue.ttc".to_string(), |
| 35 | "Arial.ttf".to_string(), |
| 36 | "Helvetica.ttc".to_string(), |
| 37 | ], |
| 38 | ); |
| 39 | |
| 40 | // Linux safe fonts |
| 41 | safe_fonts.insert( |
| 42 | "linux".to_string(), |
| 43 | vec![ |
| 44 | "DejaVuSans.ttf".to_string(), |
| 45 | "LiberationSans-Regular.ttf".to_string(), |
| 46 | "NotoSans-Regular.ttf".to_string(), |
| 47 | "Ubuntu-R.ttf".to_string(), |
| 48 | ], |
| 49 | ); |
| 50 | |
| 51 | Self { |
| 52 | safe_fonts, |
| 53 | fallback_fonts: vec![ |
| 54 | "sans-serif".to_string(), |
| 55 | "Arial".to_string(), |
| 56 | "Helvetica".to_string(), |
| 57 | ], |
| 58 | } |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | impl FontConfig { |
| 63 | pub fn load_from_file<P: AsRef<Path>>(path: P) -> Result<Self, Box<dyn std::error::Error>> { |
| 64 | let content = std::fs::read_to_string(path)?; |
| 65 | let config: FontConfig = serde_json::from_str(&content)?; |
| 66 | Ok(config) |
| 67 | } |
| 68 | |
| 69 | pub fn save_to_file<P: AsRef<Path>>(&self, path: P) -> Result<(), Box<dyn std::error::Error>> { |
| 70 | let content = serde_json::to_string_pretty(self)?; |
| 71 | std::fs::write(path, content)?; |
| 72 | Ok(()) |
| 73 | } |
| 74 | |
| 75 | pub fn get_platform_fonts(&self) -> Vec<String> { |
| 76 | let platform = if cfg!(target_os = "windows") { |
| 77 | "windows" |
| 78 | } else if cfg!(target_os = "macos") { |
| 79 | "macos" |
| 80 | } else { |
| 81 | "linux" |
| 82 | }; |
| 83 | |
| 84 | self.safe_fonts |
| 85 | .get(platform) |
| 86 | .cloned() |
| 87 | .unwrap_or_else(|| self.fallback_fonts.clone()) |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /// Creates a safe font system that loads only specific fonts to avoid problematic system fonts |
| 92 | pub fn create_safe_font_system() -> CosmicFontSystem { |
| 93 | let config = FontConfig::load_from_file("safe_fonts.json").unwrap_or_else(|_| { |
| 94 | log::warn!("Could not load safe_fonts.json, using default configuration"); |
| 95 | FontConfig::default() |
| 96 | }); |
| 97 | |
| 98 | let mut db = fontdb::Database::new(); |
| 99 | |
| 100 | if cfg!(target_os = "windows") { |
| 101 | // Load only safe fonts on Windows to avoid problematic fonts like mstmc.ttf |
| 102 | let safe_fonts = config.get_platform_fonts(); |
| 103 | let system_fonts_dir = std::env::var("WINDIR") |
| 104 | .map(|windir| format!("{}\\Fonts", windir)) |
| 105 | .unwrap_or_else(|_| "C:\\Windows\\Fonts".to_string()); |
| 106 | |
| 107 | for font_name in safe_fonts { |
| 108 | let font_path = format!("{}\\{}", system_fonts_dir, font_name); |
| 109 | if std::path::Path::new(&font_path).exists() { |
| 110 | db.load_font_file(&font_path).ok(); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | // If no fonts were loaded, fall back to a minimal set |
| 115 | if db.faces().count() == 0 { |
| 116 | log::warn!("No safe fonts found, loading minimal fallback fonts"); |
| 117 | db.load_font_file(format!("{}\\arial.ttf", system_fonts_dir)) |
| 118 | .ok(); |
| 119 | db.load_font_file(format!("{}\\tahoma.ttf", system_fonts_dir)) |
| 120 | .ok(); |
| 121 | } |
| 122 | } else { |
| 123 | // On macOS and Linux, load system fonts normally |
| 124 | db.load_system_fonts(); |
| 125 | |
| 126 | // Explicitly load emoji font on macOS to ensure it's available |
| 127 | if cfg!(target_os = "macos") { |
| 128 | let emoji_path = "/System/Library/Fonts/Apple Color Emoji.ttc"; |
| 129 | if std::path::Path::new(emoji_path).exists() { |
| 130 | db.load_font_file(emoji_path).ok(); |
| 131 | } |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | let locale = get_locale().unwrap_or_else(|| "en-US".to_string()); |
| 136 | CosmicFontSystem::new_with_locale_and_db(locale, db) |
| 137 | } |
| 138 |