get book language by parsing OPF file

lb803 · Jun 20, 2020 · f51c586 · f51c586
1 parent 8465986
commit f51c586
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Showing 3 changed files with 22 additions and 7 deletions.
diff --git a/README.md b/README.md
@@ -6,15 +6,14 @@ This project is a port of the [Access-Aide](https://github.com/kevinhendricks/Ac
 The _Access Aide_ plugin for Calibre is at a very early developmental stage.
 
 # Features
- -  Add 'en-GB' language declaration to `<html>` tags.
+ -  Add language declaration to `<html>` tags.
 
 # Coming features
- -  Retrieve book language from book metadata;
  -  Add in appropriate epub:type semantic tags;
  -  Map epub:type attributes to their appropriate aria role attribute;
  -  Add accessibility declarations to book metadata.
 
-# Licence
+# License
 Source code by Luca Baffa, released under the GPL 3 licence.
 
-The plugin icon (`./icon/icon.png`) comes from the `adwaita-icon-theme` pack ([gitlab page](https://gitlab.gnome.org/GNOME/adwaita-icon-theme) of the project), released as CC SA 3.0 by the GNOME Project.
+The plugin icon (`./icon/icon.png`) comes from the `adwaita-icon-theme` pack ([gitlab page](https://gitlab.gnome.org/GNOME/adwaita-icon-theme) of the project), released as LGPL v3 by the GNOME Project.
diff --git a/__init__.py b/__init__.py
@@ -2,7 +2,7 @@
 
 class DemoPlugin(EditBookToolPlugin):
     name = 'Access Aide'
-    version = (0, 0, 1)
+    version = (0, 1, 0)
     author = 'Luca Baffa'
     supported_platforms = ['windows', 'osx', 'linux']
     description = 'Access Aide plugin for Calibre'

diff --git a/main.py b/main.py
@@ -34,8 +34,8 @@ def main(self):
             return error_dialog(self.gui, 'No book open',
                                 'Need to have a book open first', show=True)
 
-        # TODO Parse book metadata and find book language
-        lang = 'en-GB'
+        # get the book main language
+        lang = self.get_lang(container)
 
         # iterate over book files
         for name, media_type in container.mime_map.items():
@@ -48,6 +48,22 @@ def main(self):
 
                 container.dirty(name)
 
+    def get_lang(self, container):
+        '''
+        This method parses the OPF file, gets a list of the declared
+        languages and returns the first one (which we trust to be the
+        main language of the book)
+        '''
+
+        languages = container.opf_xpath('//dc:language/text()')
+
+        if not languages:
+            return error_dialog(self.gui, 'No language declaration for book',
+                                'The OPF file does not report language info.',
+                                show=True)
+
+        return languages[0]
+
     def add_lang(self, root, lang):
         '''
         This method finds the <html> tag of the given 'root' element