add a disable ocr build option

Author: AlexanderVanhee

data/ui/image_stack.blp

@@ -100,6 +100,7 @@ template $GradiaImageStack: Adw.Bin {
                 Gtk.Revealer ocr_revealer {
                   transition-type: slide_right;
                   transition-duration: 300;
+                    reveal-child: false;
                     Gtk.Button ocr_button {
                       icon-name: "scanner-symbolic";
                       tooltip-text: _("Text Extraction");

data/ui/preferences_window.blp

@@ -97,6 +97,7 @@ template $GradiaPreferencesWindow : Adw.PreferencesDialog {
     }
     Adw.PreferencesGroup {
       title: _("Text Extraction");
+      visible: bind template.ocr_enabled;
       Adw.ActionRow  {
         title: _("_Language Models");
         use-underline: true;

gradia/backend/ocr.py

@@ -25,7 +25,7 @@
 from pathlib import Path
 from gradia.backend.logger import Logger
 from gradia.backend.settings import Settings
-from gradia.constants import app_id
+from gradia.constants import app_id, ocr_enabled
 from gradia.constants import ocr_tesseract_cmd, ocr_original_tessdata
 
 
@@ -79,7 +79,7 @@ def _update_ocr_action_state(self):
             available = Path(ocr_tesseract_cmd).exists() and len(self.get_installed_models()) > 0
             ocr_action = self.window.lookup_action("ocr")
             if ocr_action and hasattr(ocr_action, 'set_state'):
-                ocr_action.set_state(GLib.Variant.new_boolean(available))
+                ocr_action.set_state(GLib.Variant.new_boolean(available and ocr_enabled.lower() == 'true'))
 
     def get_current_model(self):
         return self.settings.trained_data

gradia/constants.in

@@ -28,8 +28,9 @@ build_type       = '@BUILD_TYPE@'
 project_url      = '@PROJECT_URL@'
 bugtracker_url   = '@BUGTRACKER_URL@'
 help_url         = '@HELP_URL@'
-#translate_url    = '@TRANSLATE_URL@'
+#translate_url   = '@TRANSLATE_URL@'
 
 # OCR paths
+ocr_enabled            = '@ENABLE_OCR@'
 ocr_tesseract_cmd      = '@OCR_TESSERACT_CMD@'
 ocr_original_tessdata  = '@OCR_ORIGINAL_TESSDATA_DIR@'

meson.build

@@ -65,6 +65,8 @@ endif
 OCR_TESSERACT_CMD = '/app/bin/tesseract'
 OCR_ORIGINAL_TESSDATA_DIR = '/app/share/tessdata'
 
+enable_ocr = get_option('enable-ocr')
+
 # Install configuration data
 conf = configuration_data()
 conf.set('APP_ID', APPLICATION_ID)
@@ -78,7 +80,7 @@ conf.set('BUILD_TYPE', get_option('buildtype'))
 conf.set('SCHEMAS_DIR', PKGDATA_DIR)
 conf.set('SOURCE_DIR', meson.current_source_dir())
 conf.set('BUILD_DIR', meson.current_build_dir())
-
+conf.set('ENABLE_OCR', enable_ocr)
 conf.set('OCR_TESSERACT_CMD', OCR_TESSERACT_CMD)
 conf.set('OCR_ORIGINAL_TESSDATA_DIR', OCR_ORIGINAL_TESSDATA_DIR)
 

meson.options

@@ -0,0 +1 @@
+option('enable-ocr', type: 'boolean', value: true, description: 'Enable OCR functionality')