add option to adjust azw3 offset

README.md

@@ -10,11 +10,11 @@ Please read [CONTRIBUTING](./docs/CONTRIBUTING.md)
 
 Install calibre 5.
 
-Add the plugin to "The context menu for the books in the calibre library" in "Preferences" -> "Toolbars & menus". Right click a MOBI format book then click the plugin menu, it will start generating Word Wise file in a few minutes depends on the book size and your computer speed.
+Add the plugin to "The context menu for the books in the calibre library" in "Preferences" -> "Toolbars & menus". Right click a MOBI or AZW3 format book then click the plugin menu, it will start generating Word Wise file in a few minutes that depends on the book size and your computer speed.
 
 If your Kindle device is connected, it will send the file to your device.
 
-You can try it on azw3 books but may not work. If you know how to deal with azw3 or kfx books please help.
+For AZW3 books you may have to adjust the offset manually. For example, if you find the word is 16 characters(include white space) behind where it should be, set -16 in the plugin settings.
 
 ## License
 

__init__.py

@@ -7,6 +7,16 @@ class WordDumbDumb(InterfaceActionBase):
     description = 'Create Kindle Word Wise file.'
     supported_platforms = ['linux', 'osx', 'windows']
     author = 'xxyzz'
-    version = (1, 1, 0)
+    version = (1, 2, 0)
     minimum_calibre_version = (5, 0, 0) # Python3
     actual_plugin = 'calibre_plugins.worddumb.ui:WordDumb'
+
+    def is_customizable(self):
+        return True
+
+    def config_widget(self):
+        from calibre_plugins.worddumb.config import ConfigWidget
+        return ConfigWidget()
+
+    def save_settings(self, config_widget):
+        config_widget.save_settings()

config.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+
+from calibre.utils.config import JSONConfig
+from PyQt5.Qt import QWidget, QHBoxLayout, QLabel, QLineEdit, QPushButton, QVBoxLayout
+import webbrowser
+
+prefs = JSONConfig('plugins/worddumb')
+
+prefs.defaults['offset'] = '0'
+
+class ConfigWidget(QWidget):
+    def __init__(self):
+        QWidget.__init__(self)
+
+        self.vl = QVBoxLayout()
+        self.setLayout(self.vl)
+        self.hl = QHBoxLayout()
+        self.vl.addLayout(self.hl)
+
+        self.label = QLabel('Offset:')
+        self.hl.addWidget(self.label)
+
+        self.offset = QLineEdit(self)
+        self.offset.setText(prefs['offset'])
+        self.hl.addWidget(self.offset)
+        self.label.setBuddy(self.offset)
+
+        self.donate_button = QPushButton('Donate', self)
+        self.donate_button.clicked.connect(self.donate)
+        self.vl.addWidget(self.donate_button)
+
+        self.github_button = QPushButton('Source code', self)
+        self.github_button.clicked.connect(self.github)
+        self.vl.addWidget(self.github_button)
+
+    def save_settings(self):
+        prefs['offset'] = self.offset.text()
+
+    def donate(self):
+        webbrowser.open('https://liberapay.com/xxyzz/donate')
+
+    def github(self):
+        webbrowser.open('https://github.com/xxyzz/WordDumb')

docs/CONTRIBUTING.md

@@ -35,8 +35,8 @@ $ create_ww_sql.py ./path-of-klld ./path-of-kll
 
 - Add GitHub action to test the code
 
-- Supports azw3 and kfx
-
 - Improve performance, especially matching lemmas part
 
 - Lemmatize words
+
+- Supports kfx

parse_job.py

@@ -4,6 +4,7 @@
 from calibre.utils.logging import default_log
 from calibre_plugins.worddumb.database import connect_ww_database, \
     create_lang_layer, match_word
+from calibre_plugins.worddumb.config import prefs
 from pathlib import Path
 import re
 
@@ -41,5 +42,6 @@ def parse_book(pathtoebook, book_fmt):
             lemma = text[match_word.start():match_word.end()]
             start = match_text.start() + match_word.start()
             if book_fmt.lower() == 'azw3':
-                start -= 14 # I have no idea, may not work
+                start -= 14 # this value works for some books of mine
+                start += int(prefs['offset'])
             yield (start, lemma.decode('utf-8'))