custom_font_hook.rs (978B) - raw

      1 use std::{ffi::CStr, fs};
      2 
      3 use nix::libc::{self, c_uint};
      4 
      5 use crate::{config, def_hook, dobby_hook_sym};
      6 
      7 def_hook!(
      8     open_hook,
      9     i32,
     10     |path: *const u8, flags: i32, mode: c_uint| {
     11         if let Ok(pathname) = CStr::from_ptr(path).to_str() {
     12             if pathname == "/system/fonts/NotoColorEmoji.ttf"  {
     13                 if let Some(font_path) = config::native_config().custom_emoji_font_path {
     14                     if fs::metadata(&font_path).is_ok() {
     15                         return libc::openat(libc::AT_FDCWD, font_path.as_ptr() as *const u8, flags, mode);
     16                     } else {
     17                         warn!("custom emoji font path does not exist: {}", font_path);
     18                     }
     19                 }
     20             }
     21         }
     22 
     23         open_hook_original.unwrap()(path, flags, mode)
     24     }
     25 );
     26 
     27 
     28 pub fn init() {
     29     if config::native_config().custom_emoji_font_path.is_none() {
     30         return;
     31     }
     32 
     33     dobby_hook_sym!("libc.so", "open", open_hook);
     34 }