E-book viewer: Allow customizing the website that is used as a dictionary for looking up words in the viewer. Click the Preferences button in the viewer and choose the dictionaries tab to customize the website.

src/calibre/gui2/viewer/config.py

@@ -10,15 +10,18 @@ __docformat__ = 'restructuredtext en'
 import zipfile
 from functools import partial
 
-from PyQt5.Qt import (QFont, QDialog, Qt, QColor, QColorDialog,
+from PyQt5.Qt import (
-        QMenu, QInputDialog)
+    QFont, QDialog, Qt, QColor, QColorDialog, QMenu, QInputDialog,
+    QListWidgetItem, QFormLayout, QLabel, QLineEdit, QDialogButtonBox)
 
 from calibre.constants import iswindows, isxp
 from calibre.utils.config import Config, StringConfig, JSONConfig
-from calibre.gui2 import min_available_height
+from calibre.utils.icu import sort_key
+from calibre.utils.localization import get_language, calibre_langcode_to_name
+from calibre.gui2 import min_available_height, error_dialog
+from calibre.gui2.languages import LanguagesEdit
 from calibre.gui2.shortcuts import ShortcutConfig
 from calibre.gui2.viewer.config_ui import Ui_Dialog
-from calibre.utils.localization import get_language
 
 def config(defaults=None):
     desc = _('Options to customize the ebook viewer')
@@ -143,10 +146,14 @@ class ConfigDialog(QDialog, Ui_Dialog):
         opts = config().parse()
         self.load_options(opts)
         self.init_load_themes()
+        self.init_dictionaries()
 
         self.clear_search_history_button.clicked.connect(self.clear_search_history)
         self.resize(self.width(), min(self.height(), max(575, min_available_height()-25)))
 
+        for x in 'add remove change'.split():
+            getattr(self, x + '_dictionary_website_button').clicked.connect(getattr(self, x + '_dictionary_website'))
+
     def clear_search_history(self):
         from calibre.gui2 import config
         config['viewer_search_history'] = []
@@ -190,9 +197,83 @@ class ConfigDialog(QDialog, Ui_Dialog):
         self.theming_message.setText(_('Deleted the theme named: %s')%
                 theme[len('theme_'):])
 
+    def init_dictionaries(self):
+        from calibre.gui2.viewer.main import dprefs
+        self.word_lookups = dprefs['word_lookups']
+
+    @dynamic_property
+    def word_lookups(self):
+        def fget(self):
+            return dict(self.dictionary_list.item(i).data(Qt.UserRole) for i in range(self.dictionary_list.count()))
+        def fset(self, wl):
+            self.dictionary_list.clear()
+            for langcode, url in sorted(wl.iteritems(), key=lambda (lc, url):sort_key(calibre_langcode_to_name(lc))):
+                i = QListWidgetItem('%s: %s' % (calibre_langcode_to_name(langcode), url), self.dictionary_list)
+                i.setData(Qt.UserRole, (langcode, url))
+        return property(fget=fget, fset=fset)
+
+    def add_dictionary_website(self):
+        class AD(QDialog):
+
+            def __init__(self, parent):
+                QDialog.__init__(self, parent)
+                self.setWindowTitle(_('Add a dictionary website'))
+                self.l = l = QFormLayout(self)
+                self.la = la = QLabel(
+                    _('Choose a language and enter the website address (URL) for it below.'
+                      ' The URL must have %s in it, which will be replaced by the actual word being'
+                      ' looked up') % '{word}')
+                la.setWordWrap(True)
+                l.addRow(la)
+                self.le = LanguagesEdit(self)
+                l.addRow(_('&Language:'), self.le)
+                self.url = u = QLineEdit(self)
+                u.setMinimumWidth(350)
+                u.setPlaceholderText(_('For example: %s') % 'http://dictionary.com/{word}')
+                l.addRow(_('&URL:'), u)
+                self.bb = bb = QDialogButtonBox(QDialogButtonBox.Ok|QDialogButtonBox.Cancel)
+                l.addRow(bb)
+                bb.accepted.connect(self.accept), bb.rejected.connect(self.reject)
+                self.resize(self.sizeHint())
+
+            def accept(self):
+                if '{word}' not in self.url.text():
+                    return error_dialog(self, _('Invalid URL'), _(
+                        'The URL {0} does not have {1} in it.').format(self.url.text(), '{word}'), show=True)
+                QDialog.accept(self)
+
+        d = AD(self)
+        if d.exec_() == d.Accepted:
+            url = d.url.text()
+            if url:
+                wl = self.word_lookups
+                for lc in d.le.lang_codes:
+                    wl[lc] = url
+                self.word_lookups = wl
+
+    def remove_dictionary_website(self):
+        idx = self.dictionary_list.currentIndex()
+        if idx.isValid():
+            lc, url = idx.data(Qt.UserRole)
+            wl = self.word_lookups
+            wl.pop(lc, None)
+            self.word_lookups = wl
+
+    def change_dictionary_website(self):
+        idx = self.dictionary_list.currentIndex()
+        if idx.isValid():
+            lc, url = idx.data(Qt.UserRole)
+            url, ok = QInputDialog.getText(self, _('Enter new website'), 'URL:', text=url)
+            if ok:
+                wl = self.word_lookups
+                wl[lc] = url
+                self.word_lookups = wl
+
     def restore_defaults(self):
         opts = config('').parse()
         self.load_options(opts)
+        from calibre.gui2.viewer.main import dprefs
+        self.word_lookups = dprefs.defaults['word_lookups']
 
     def load_options(self, opts):
         self.opt_remember_window_size.setChecked(opts.remember_window_size)
@@ -320,5 +401,5 @@ class ConfigDialog(QDialog, Ui_Dialog):
         c.set('show_controls', self.opt_show_controls.isChecked())
         for x in ('top', 'bottom', 'side'):
             c.set(x+'_margin', int(getattr(self, 'opt_%s_margin'%x).value()))
-
+        from calibre.gui2.viewer.main import dprefs
-
+        dprefs['word_lookups'] = self.word_lookups

src/calibre/gui2/viewer/config.ui

@@ -67,8 +67,8 @@ QToolBox::tab:hover {
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>811</width>
+            <width>371</width>
-            <height>380</height>
+            <height>236</height>
            </rect>
           </property>
           <attribute name="label">
@@ -240,8 +240,8 @@ QToolBox::tab:hover {
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>811</width>
+            <width>374</width>
-            <height>380</height>
+            <height>211</height>
            </rect>
           </property>
           <attribute name="label">
@@ -370,8 +370,8 @@ QToolBox::tab:hover {
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>811</width>
+            <width>799</width>
-            <height>380</height>
+            <height>378</height>
            </rect>
           </property>
           <attribute name="label">
@@ -472,8 +472,8 @@ QToolBox::tab:hover {
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>811</width>
+            <width>340</width>
-            <height>380</height>
+            <height>70</height>
            </rect>
           </property>
           <attribute name="label">
@@ -551,8 +551,8 @@ QToolBox::tab:hover {
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>811</width>
+            <width>384</width>
-            <height>380</height>
+            <height>115</height>
            </rect>
           </property>
           <attribute name="label">
@@ -622,8 +622,8 @@ QToolBox::tab:hover {
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>811</width>
+            <width>368</width>
-            <height>380</height>
+            <height>167</height>
            </rect>
           </property>
           <attribute name="label">
@@ -853,6 +853,81 @@ QToolBox::tab:hover {
        </item>
       </layout>
      </widget>
+     <widget class="QWidget" name="tab_5">
+      <attribute name="title">
+       <string>&amp;Dictionaries</string>
+      </attribute>
+      <layout class="QVBoxLayout" name="verticalLayout_4">
+       <item>
+        <widget class="QLabel" name="label_25">
+         <property name="text">
+          <string>When you lookup a word, the viewer opens the word's definition in a dictionary website. The dictionary website is chosen based on the language of the book. You can customize the website used for a particular language here.</string>
+         </property>
+         <property name="wordWrap">
+          <bool>true</bool>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QListWidget" name="dictionary_list"/>
+       </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_3">
+         <item>
+          <widget class="QPushButton" name="add_dictionary_website_button">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="text">
+            <string>&amp;Add website</string>
+           </property>
+           <property name="icon">
+            <iconset resource="../../../../resources/images.qrc">
+             <normaloff>:/images/plus.png</normaloff>:/images/plus.png</iconset>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QPushButton" name="remove_dictionary_website_button">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="text">
+            <string>&amp;Remove website</string>
+           </property>
+           <property name="icon">
+            <iconset resource="../../../../resources/images.qrc">
+             <normaloff>:/images/minus.png</normaloff>:/images/minus.png</iconset>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QPushButton" name="change_dictionary_website_button">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="text">
+            <string>&amp;Change website</string>
+           </property>
+           <property name="icon">
+            <iconset resource="../../../../resources/images.qrc">
+             <normaloff>:/images/edit_input.png</normaloff>:/images/edit_input.png</iconset>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
+      </layout>
+     </widget>
     </widget>
    </item>
   </layout>

src/calibre/gui2/viewer/main.py

@@ -24,8 +24,11 @@ from calibre.customize.ui import available_input_formats
 from calibre import as_unicode, force_unicode, isbytestring
 from calibre.ptempfile import reset_base_dir
 from calibre.utils.zipfile import BadZipfile
+from calibre.utils.localization import canonicalize_lang, lang_as_iso639_1
 
 vprefs = JSONConfig('viewer')
+dprefs = JSONConfig('viewer_dictionaries')
+dprefs.defaults['word_lookups'] = {}
 
 class Worker(Thread):
 
@@ -48,6 +51,18 @@ class RecentAction(QAction):
         self.path = path
         QAction.__init__(self, os.path.basename(path), parent)
 
+def default_lookup_website(lang):
+    lang = lang_as_iso639_1(lang) or lang
+    if lang == 'en':
+        prefix = 'https://www.wordnik.com/words/'
+    else:
+        prefix = 'http://%s.wiktionary.org/wiki/' % lang
+    return prefix + '{word}'
+
+def lookup_website(lang):
+    wm = dprefs['word_lookups']
+    return wm.get(lang, default_lookup_website(lang))
+
 class EbookViewer(MainWindow):
 
     STATE_VERSION = 2
@@ -272,17 +287,14 @@ class EbookViewer(MainWindow):
                 at_start=True)
 
     def lookup(self, word):
-        from calibre.utils.localization import canonicalize_lang, lang_as_iso639_1
         from urllib import quote
-        lang = lang_as_iso639_1(self.view.current_language)
-        if not lang:
-            lang = canonicalize_lang(lang) or 'en'
         word = quote(word.encode('utf-8'))
-        if lang == 'en':
+        try:
-            prefix = 'https://www.wordnik.com/words/'
+            url = lookup_website(canonicalize_lang(self.view.current_language) or 'en').format(word=word)
-        else:
+        except Exception:
-            prefix = 'http://%s.wiktionary.org/wiki/' % lang
+            traceback.print_exc()
-        open_url(prefix + word)
+            url = default_lookup_website(canonicalize_lang(self.view.current_language) or 'en').format(word=word)
+        open_url(url)
 
     def get_remember_current_page_opt(self):
         from calibre.gui2.viewer.documentview import config