configure preview image background color via theme.toml

config/theme.toml

@@ -2,6 +2,8 @@
 ## General
 ##########################################
 lscolors_enabled = false
+# The image preview background color, only RGB colors are accepted.
+# preview_background = "#FFFFFF"
 
 ##########################################
 ## Tabs

docs/image_previews/README.md

@@ -21,6 +21,8 @@ preview_protocol = "halfblocks"
 ...
 ```
 
+The background color can be configured in `theme.toml`.
+
 ## XDG-Thumbnails and thumbnails for non-image files
 
 By default, Joshuto uses thumbnails and the

src/config/theme/mod.rs

@@ -7,6 +7,7 @@ pub mod theme_raw;
 use std::collections::HashMap;
 
 use lscolors::LsColors;
+use ratatui::style::Color;
 
 use crate::constants::config::THEME_CONFIG;
 use crate::error::AppResult;
@@ -17,6 +18,8 @@ use style::AppStyle;
 use tab::TabTheme;
 use theme_raw::AppThemeRaw;
 
+use self::style_raw::AppStyleRaw;
+
 #[derive(Clone, Debug)]
 pub struct AppTheme {
     pub tabs: TabTheme,
@@ -30,6 +33,7 @@ pub struct AppTheme {
     pub socket: AppStyle,
     pub ext: HashMap<String, AppStyle>,
     pub lscolors: Option<LsColors>,
+    pub preview_background: Color,
 }
 
 impl AppTheme {
@@ -81,6 +85,7 @@ impl From<AppThemeRaw> for AppTheme {
         } else {
             None
         };
+        let preview_background = AppStyleRaw::str_to_color(&raw.preview_background);
 
         Self {
             selection,
@@ -94,6 +99,7 @@ impl From<AppThemeRaw> for AppTheme {
             ext,
             tabs: TabTheme::from(tabs),
             lscolors,
+            preview_background,
         }
     }
 }

src/config/theme/theme_raw.rs

@@ -28,4 +28,6 @@ pub struct AppThemeRaw {
     pub ext: HashMap<String, AppStyleRaw>,
     #[serde(default)]
     pub lscolors_enabled: bool,
+    #[serde(default)]
+    pub preview_background: String,
 }

src/types/state/app_state.rs

@@ -2,6 +2,7 @@ use std::collections::HashSet;
 use std::sync::mpsc;
 
 use allmytoes::{AMTConfiguration, AMT};
+use ratatui::style::Color;
 use ratatui_image::picker::Picker;
 
 use crate::commands::quit::QuitAction;
@@ -12,7 +13,7 @@ use crate::types::state::{
     CommandLineState, MessageQueue, PreviewState, TabState, UiState, WorkerState,
 };
 
-use crate::Args;
+use crate::{Args, THEME_T};
 
 use super::{FileManagerState, ThreadPool};
 
@@ -30,6 +31,10 @@ impl AppState {
     pub fn new(config: AppConfig, args: Args) -> Self {
         let picker = if config.preview_options.preview_shown_hook_script.is_none() {
             Picker::from_termios().ok().and_then(|mut picker| {
+                picker.background_color = match THEME_T.preview_background {
+                    Color::Rgb(r,g,b) => Some(image::Rgb([r,g,b])),
+                    _ => None,
+                };
                 match config.preview_options.preview_protocol {
                     PreviewProtocol::Auto => {
                         picker.guess_protocol(); // Must run before Events::new() because it makes ioctl calls.