feat: Add Tesseract as Linux System OCR

src-tauri/src/ocr.rs

@@ -1,7 +1,8 @@
+use dirs::cache_dir;
+
 #[tauri::command(async)]
 #[cfg(target_os = "windows")]
 pub fn system_ocr(app_handle: tauri::AppHandle) -> Result<String, String> {
-    use dirs::cache_dir;
     use win_ocr::ocr;
     let mut app_cache_dir_path = cache_dir().expect("Get Cache Dir Failed");
     app_cache_dir_path.push(&app_handle.config().tauri.bundle.identifier);
@@ -16,16 +17,31 @@ pub fn system_ocr(app_handle: tauri::AppHandle) -> Result<String, String> {
 #[tauri::command]
 #[cfg(target_os = "macos")]
 pub fn system_ocr(app_handle: tauri::AppHandle) -> Result<String, String> {
-    use dirs::cache_dir;
-
     let mut app_cache_dir_path = cache_dir().expect("Get Cache Dir Failed");
     app_cache_dir_path.push(&app_handle.config().tauri.bundle.identifier);
     app_cache_dir_path.push("pot_screenshot_cut.png");
     Ok(app_cache_dir_path.to_str().unwrap().to_string())
 }
 
-#[tauri::command]
+#[tauri::command(async)]
 #[cfg(target_os = "linux")]
 pub fn system_ocr(app_handle: tauri::AppHandle, lang: &str) -> Result<String, String> {
-    Err("Not supported yet".to_string())
+    let mut app_cache_dir_path = cache_dir().expect("Get Cache Dir Failed");
+    app_cache_dir_path.push(&app_handle.config().tauri.bundle.identifier);
+    app_cache_dir_path.push("pot_screenshot_cut.png");
+    let output = match std::process::Command::new("tesseract")
+        .arg(app_cache_dir_path.to_str().unwrap())
+        .arg("stdout")
+        .arg("-l")
+        .arg(lang)
+        .output()
+    {
+        Ok(v) => v,
+        Err(e) => return Err(e.to_string()),
+    };
+
+    match String::from_utf8(output.stdout) {
+        Ok(v) => Ok(v),
+        Err(e) => Err(e.to_string()),
+    }
 }

src-tauri/tauri.conf.json

@@ -54,7 +54,7 @@
             "category": "Utility",
             "copyright": "GPLv3",
             "deb": {
-                "depends": ["libxdo-dev", "libxcb1", "libxrandr2"]
+                "depends": ["libxdo-dev", "libxcb1", "libxrandr2", "tesseract-ocr-all"]
             },
             "externalBin": [],
             "icon": [

src/interfaces_ocr/index.js

@@ -1,4 +1,3 @@
-export * as tesseract from './tesseract';
 export * as baidu from './baidu';
 export * as baidu_accurate from './baidu_accurate';
 export * as baidu_img from './baidu_img';

src/interfaces_ocr/system.js

@@ -1,20 +1,44 @@
 import { ocrID } from '../windows/Ocr/components/TextArea';
-import { ocr as tesseract } from './tesseract';
 import { invoke } from '@tauri-apps/api';
 import { Command } from '@tauri-apps/api/shell';
 
 export const info = {
     name: 'system',
-    supportLanguage: {},
+    supportLanguage: {
+        auto: 'chi_sim+eng+chi_tra+jpn+kor+fra+spa+rus+deu+ita+tur+por+vie+ind+tha+msa+ara+hin',
+        zh_cn: 'chi_sim',
+        zh_tw: 'chi_tra',
+        en: 'eng',
+        yue: 'chi_sim',
+        ja: 'jpn',
+        ko: 'kor',
+        fr: 'fra',
+        es: 'spa',
+        ru: 'rus',
+        de: 'deu',
+        it: 'ita',
+        tr: 'tur',
+        pt: 'por',
+        vi: 'vie',
+        id: 'ind',
+        th: 'tha',
+        ms: 'msa',
+        ar: 'ara',
+        hi: 'hin',
+    },
     needs: [],
 };
 
-export async function ocr(base64, lang, setText, id) {
+export async function ocr(_, lang, setText, id) {
     const is_linux = await invoke('is_linux');
     const is_macos = await invoke('is_macos');
-    // Linux 没法做系统OCR，用Tesseract代替
+
     if (is_linux) {
-        await tesseract(base64, lang, setText, id);
+        const { supportLanguage } = info;
+        const result = await invoke('system_ocr', { lang: supportLanguage[lang] });
+        if (ocrID === id || id === 'translate') {
+            setText(result);
+        }
     } else if (is_macos) {
         const img_path = await invoke('system_ocr');
         const command = Command.sidecar('sidecar/ocr', img_path);