Add a toolbar button to quick switch profiles

src/calibre/gui2/viewer/toolbars.py

@@ -6,8 +6,8 @@ import os
 from functools import partial
 from qt.core import (
     QAbstractItemView, QAction, QDialog, QDialogButtonBox, QGroupBox, QHBoxLayout,
-    QIcon, QKeySequence, QLabel, QListWidget, QListWidgetItem, QMenu, Qt, QToolBar,
-    QToolButton, QVBoxLayout, pyqtSignal,
+    QIcon, QInputDialog, QKeySequence, QLabel, QListWidget, QListWidgetItem, QMenu, Qt,
+    QToolBar, QToolButton, QVBoxLayout, pyqtSignal,
 )
 from qt.webengine import QWebEnginePage
 
@@ -41,6 +41,7 @@ def all_actions():
     if not hasattr(all_actions, 'ans'):
         amap = {
             'color_scheme': Action('format-fill-color.png', _('Switch color scheme')),
+            'profiles': Action('auto-reload.png', _('Apply settings from a saved profile')),
             'back': Action('back.png', _('Back'), 'back'),
             'forward': Action('forward.png', _('Forward'), 'forward'),
             'open': Action('document_open.png', _('Open e-book')),
@@ -215,6 +216,10 @@ class ActionsToolBar(ToolBar):
         self.color_scheme_menu = m = QMenu(self)
         a.setMenu(m)
         m.aboutToShow.connect(self.populate_color_scheme_menu)
+        self.profiles_action = a = QAction(aa.profiles.icon, aa.profiles.text, self)
+        self.profiles_menu = m = QMenu(self)
+        a.setMenu(m)
+        m.aboutToShow.connect(self.populate_profiles_menu)
 
         self.add_actions()
 
@@ -237,7 +242,8 @@ class ActionsToolBar(ToolBar):
                     self.addAction(getattr(self, f'{x}_action'))
                 except AttributeError:
                     pass
-        w = self.widgetForAction(self.color_scheme_action)
+        for x in (self.color_scheme_action, self.profiles_action):
+            w = self.widgetForAction(x)
             if w:
                 w.setPopupMode(QToolButton.ToolButtonPopupMode.InstantPopup)
 
@@ -338,6 +344,35 @@ class ActionsToolBar(ToolBar):
     def on_view_created(self, data):
         self.default_color_schemes = data['default_color_schemes']
 
+    def populate_profiles_menu(self):
+        from calibre.gui2.viewer.config import load_viewer_profiles
+        m = self.profiles_menu
+        m.clear()
+        self.profiles = load_viewer_profiles('viewer:')
+        self.profiles['__default__'] = {}
+        def a(name, display_name=''):
+            a = m.addAction(display_name or name)
+            a.setObjectName(f'profile-switch-action:{name}')
+            a.triggered.connect(self.profile_switch_triggered)
+        a('__default__', _('Restore settings to defaults'))
+        m.addSeparator()
+        for profile_name in sorted(self.profiles, key=lambda x: x.lower()):
+            if profile_name == '__default__':
+                continue
+            a(profile_name)
+        m.addSeparator()
+        m.addAction(_('Save current settings as a profile')).triggered.connect(self.save_profile)
+
+    def profile_switch_triggered(self):
+        key = self.sender().objectName().partition(':')[-1]
+        profile = self.profiles[key]
+        self.web_view.profile_op('apply-profile', key, profile)
+
+    def save_profile(self):
+        name, ok = QInputDialog.getText(self, _('Enter name of profile to create'), _('&Name of profile'))
+        if ok:
+            self.web_view.profile_op('request-save', name, {})
+
     def populate_color_scheme_menu(self):
         m = self.color_scheme_menu
         m.clear()

src/calibre/gui2/viewer/web_view.py

@@ -577,6 +577,10 @@ class WebView(RestartingWebEngineView):
         elif which == 'save-profile':
             save_viewer_profile(profile_name, settings, 'viewer:')
             self.execute_when_ready('profile_response', 'save-profile', profile_name)
+        elif which == 'apply-profile':
+            self.execute_when_ready('profile_response', 'apply-profile', settings)
+        elif which == 'request-save':
+            self.execute_when_ready('profile_response', 'request-save', profile_name)
 
     def link_hovered(self, url):
         if url == 'javascript:void(0)':

src/pyj/viewer-main.pyj

@@ -24,7 +24,9 @@ from read_book.iframe import main as iframe_main
 from read_book.open_book import remove_recently_opened
 from read_book.prefs.head_foot import set_time_formatter
 from read_book.view import View
-from session import local_storage, session_defaults, default_interface_data
+from session import (
+    apply_reader_profile, default_interface_data, local_storage, session_defaults, settings_for_reader_profile
+)
 from utils import debounce, encode_query_with_path, parse_url_params
 from viewer.constants import FAKE_HOST, FAKE_PROTOCOL
 
@@ -82,6 +84,15 @@ def profile_response(which, x):
     elif which is 'save-profile':
         profiles_callbacks.saved()
         profiles_callbacks.saved = None
+    elif which is 'apply-profile':
+        sd = get_session_data()
+        apply_reader_profile(sd, x)
+        if view:
+            view.preferences_changed()
+    elif which is 'request-save':
+        sd = get_session_data()
+        settings = settings_for_reader_profile(sd)
+        save_profile(x, settings, def(): pass;)
 
 
 def get_all_profiles(proceed):