Viewer: Allow also using --open-at with book positions

src/calibre/gui2/viewer/main.py

@@ -14,7 +14,7 @@ from PyQt5.QtWebEngineCore import QWebEngineUrlScheme
 from calibre import as_unicode, prints
 from calibre.constants import FAKE_PROTOCOL, VIEWER_APP_UID, islinux
 from calibre.gui2 import Application, error_dialog, setup_gui_option_parser
-from calibre.gui2.viewer.ui import EbookViewer
+from calibre.gui2.viewer.ui import EbookViewer, is_float
 from calibre.ptempfile import reset_base_dir
 from calibre.utils.config import JSONConfig
 from calibre.utils.ipc import RC, viewer_socket_address
@@ -163,7 +163,7 @@ View an e-book.
         help=_('Force reload of all opened books'))
     a('--open-at', default=None, help=_(
         'The position at which to open the specified book. The position is '
-        'a location you can get by using the Goto action in the viewer controls. '
+        'a location or position you can get by using the Go to->Location action in the viewer controls. '
         'Alternately, you can use the form toc:something and it will open '
         'at the location of the first Table of Contents entry that contains '
         'the string "something".'))
@@ -188,7 +188,7 @@ def main(args=sys.argv):
     parser = option_parser()
     opts, args = parser.parse_args(args)
 
-    if opts.open_at and not (opts.open_at.startswith('toc:') or opts.open_at.startswith('epubcfi(/')):
+    if opts.open_at and not (opts.open_at.startswith('toc:') or opts.open_at.startswith('epubcfi(/') or is_float(opts.open_at)):
         raise SystemExit('Not a valid --open-at value: {}'.format(opts.open_at))
 
     listener = None

src/calibre/gui2/viewer/ui.py

@@ -46,6 +46,15 @@ from polyglot.builtins import as_bytes, itervalues
 annotations_dir = os.path.join(viewer_config_dir, 'annots')
 
 
+def is_float(x):
+    try:
+        float(x)
+        return True
+    except Exception:
+        pass
+    return False
+
+
 def dock_defs():
     Dock = namedtuple('Dock', 'name title initial_area allowed_areas')
     ans = {}
@@ -353,13 +362,15 @@ class EbookViewer(MainWindow):
         self.load_book_data()
         self.update_window_title()
         initial_cfi = self.initial_cfi_for_current_book()
-        initial_toc_node = None
+        initial_toc_node = initial_bookpos = None
         if open_at:
             if open_at.startswith('toc:'):
                 initial_toc_node = self.toc_model.node_id_for_text(open_at[len('toc:'):])
             elif open_at.startswith('epubcfi(/'):
                 initial_cfi = open_at
-        self.web_view.start_book_load(initial_cfi=initial_cfi, initial_toc_node=initial_toc_node)
+            elif is_float(open_at):
+                initial_bookpos = float(open_at)
+        self.web_view.start_book_load(initial_cfi=initial_cfi, initial_toc_node=initial_toc_node, initial_bookpos=initial_bookpos)
 
     def load_book_data(self):
         self.load_book_annotations()

src/calibre/gui2/viewer/web_view.py

@@ -502,9 +502,9 @@ class WebView(RestartingWebEngineView):
         for func, args in iteritems(self.pending_bridge_ready_actions):
             getattr(self.bridge, func)(*args)
 
-    def start_book_load(self, initial_cfi=None, initial_toc_node=None):
+    def start_book_load(self, initial_cfi=None, initial_toc_node=None, initial_bookpos=None):
         key = (set_book_path.path,)
-        self.execute_when_ready('start_book_load', key, initial_cfi, initial_toc_node, set_book_path.pathtoebook)
+        self.execute_when_ready('start_book_load', key, initial_cfi, initial_toc_node, initial_bookpos, set_book_path.pathtoebook)
 
     def execute_when_ready(self, action, *args):
         if self.bridge.ready:

src/pyj/read_book/goto.pyj

@@ -118,8 +118,7 @@ def create_location_overlay(current_position_data, overlay, container):
 
     def goto_pos():
         src = document.querySelector(f'#{container_id} [name=newpos]')
-        val = max(0, min(1000 * float(src.value) / current_position_data.book_length, 1))
-        ui_operations.goto_frac(val)
+        ui_operations.goto_book_position(float(src.value))
         overlay.hide()
 
     container.lastChild.appendChild(E.div(

src/pyj/read_book/ui.pyj

@@ -67,6 +67,7 @@ class ReadUI:
         ui_operations.update_font_size = self.update_font_size.bind(self)
         ui_operations.goto_cfi = self.goto_cfi.bind(self)
         ui_operations.goto_frac = self.goto_frac.bind(self)
+        ui_operations.goto_book_position = self.goto_book_position.bind(self)
         ui_operations.delete_book = self.delete_book.bind(self)
         ui_operations.focus_iframe = self.focus_iframe.bind(self)
         ui_operations.toggle_toc = self.toggle_toc.bind(self)
@@ -166,6 +167,9 @@ class ReadUI:
     def goto_frac(self, frac):
         return self.view.goto_frac(frac)
 
+    def goto_book_position(self, bpos):
+        return self.view.goto_book_position(bpos)
+
     def delete_book(self, book, proceed):
         self.db.delete_book(book, proceed)
 

src/pyj/read_book/view.pyj

@@ -567,7 +567,7 @@ class View:
                 cfi =  '/' + rest
         return name, cfi
 
-    def display_book(self, book, initial_cfi, initial_toc_node):
+    def display_book(self, book, initial_cfi, initial_toc_node, initial_bookpos):
         self.hide_overlays()
         self.iframe.focus()
         is_current_book = self.book and self.book.key == book.key
@@ -601,6 +601,9 @@ class View:
         navigated = False
         if jstype(initial_toc_node) is 'number':
             navigated = self.goto_toc_node(initial_toc_node)
+        if not navigated and jstype(initial_bookpos) is 'number':
+            navigated = True
+            self.goto_book_position(initial_bookpos)
         if not navigated:
             self.show_name(name, initial_position=pos)
         sd = get_session_data()
@@ -694,6 +697,10 @@ class View:
         else:
             self.show_name(chapter_name, initial_position={'type':'frac', 'frac':chapter_frac, 'replace_history':True})
 
+    def goto_book_position(self, bpos):
+        val = max(0, min(1000 * float(bpos) / self.current_position_data.book_length, 1))
+        return self.goto_frac(val)
+
     def on_scroll_to_anchor(self, data):
         self.show_name(data.name, initial_position={'type':'anchor', 'anchor':data.frag, 'replace_history':False})
 

src/pyj/viewer-main.pyj

@@ -136,7 +136,7 @@ def show_error(title, msg, details):
     to_python.show_error(title, msg, details)
 
 
-def manifest_received(key, initial_cfi, initial_toc_node, pathtoebook, end_type, xhr, ev):
+def manifest_received(key, initial_cfi, initial_toc_node, initial_bookpos, pathtoebook, end_type, xhr, ev):
     nonlocal book
     if end_type is 'load':
         book = new_book(key, {})
@@ -148,7 +148,7 @@ def manifest_received(key, initial_cfi, initial_toc_node, pathtoebook, end_type,
         book.is_complete = True
         v'delete book.manifest["metadata"]'
         v'delete book.manifest["last_read_positions"]'
-        view.display_book(book, initial_cfi, initial_toc_node)
+        view.display_book(book, initial_cfi, initial_toc_node, initial_bookpos)
     else:
         show_error(_('Could not open book'), _(
             'Failed to load book manifest, click "Show details" for more info'),
@@ -230,8 +230,8 @@ def show_home_page():
 
 
 @from_python
-def start_book_load(key, initial_cfi, initial_toc_node, pathtoebook):
-    xhr = ajax('manifest', manifest_received.bind(None, key, initial_cfi, initial_toc_node, pathtoebook), ok_code=0)
+def start_book_load(key, initial_cfi, initial_toc_node, initial_bookpos, pathtoebook):
+    xhr = ajax('manifest', manifest_received.bind(None, key, initial_cfi, initial_toc_node, initial_bookpos, pathtoebook), ok_code=0)
     xhr.responseType = 'json'
     xhr.send()
 
@@ -308,6 +308,8 @@ if window is window.top:
         return view.goto_cfi(cfi)
     ui_operations.goto_frac = def(frac):
         return view.goto_frac(frac)
+    ui_operations.goto_book_position = def(bpos):
+        return view.goto_book_position(bpos)
     ui_operations.toggle_toc = def():
         to_python.toggle_toc()
     ui_operations.toggle_bookmarks = def():