notedeck

One damus client to rule them all
git clone git://jb55.com/notedeck
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app_size_handler.rs (2419B)

      1 use std::time::{Duration, Instant};
      2 
      3 use egui::Context;
      4 use tracing::info;
      5 
      6 use crate::storage::{write_file, DataPath, DataPathType, Directory};
      7 
      8 pub struct AppSizeHandler {
      9     directory: Directory,
     10     saved_size: Option<egui::Vec2>,
     11     last_saved: Instant,
     12 }
     13 
     14 static FILE_NAME: &str = "app_size.json";
     15 static DELAY: Duration = Duration::from_millis(500);
     16 
     17 impl AppSizeHandler {
     18     pub fn new(path: &DataPath) -> Self {
     19         let directory = Directory::new(path.path(DataPathType::Setting));
     20 
     21         Self {
     22             directory,
     23             saved_size: None,
     24             last_saved: Instant::now() - DELAY,
     25         }
     26     }
     27 
     28     pub fn try_save_app_size(&mut self, ctx: &Context) {
     29         // There doesn't seem to be a way to check if user is resizing window, so if the rect is different than last saved, we'll wait DELAY before saving again to avoid spamming io
     30         if self.last_saved.elapsed() >= DELAY {
     31             internal_try_save_app_size(&self.directory, &mut self.saved_size, ctx);
     32             self.last_saved = Instant::now();
     33         }
     34     }
     35 
     36     pub fn get_app_size(&self) -> Option<egui::Vec2> {
     37         if self.saved_size.is_some() {
     38             return self.saved_size;
     39         }
     40 
     41         if let Ok(file_contents) = self.directory.get_file(FILE_NAME.to_owned()) {
     42             if let Ok(rect) = serde_json::from_str::<egui::Vec2>(&file_contents) {
     43                 return Some(rect);
     44             }
     45         } else {
     46             info!("Could not find {}", FILE_NAME);
     47         }
     48 
     49         None
     50     }
     51 }
     52 
     53 fn internal_try_save_app_size(
     54     interactor: &Directory,
     55     maybe_saved_size: &mut Option<egui::Vec2>,
     56     ctx: &Context,
     57 ) {
     58     let cur_size = ctx.input(|i| i.screen_rect.size());
     59     if let Some(saved_size) = maybe_saved_size {
     60         if cur_size != *saved_size {
     61             try_save_size(interactor, cur_size, maybe_saved_size);
     62         }
     63     } else {
     64         try_save_size(interactor, cur_size, maybe_saved_size);
     65     }
     66 }
     67 
     68 fn try_save_size(
     69     interactor: &Directory,
     70     cur_size: egui::Vec2,
     71     maybe_saved_size: &mut Option<egui::Vec2>,
     72 ) {
     73     if let Ok(serialized_rect) = serde_json::to_string(&cur_size) {
     74         if write_file(
     75             &interactor.file_path,
     76             FILE_NAME.to_owned(),
     77             &serialized_rect,
     78         )
     79         .is_ok()
     80         {
     81             info!("wrote size {}", cur_size,);
     82             *maybe_saved_size = Some(cur_size);
     83         }
     84     }
     85 }