def ensure_single_instance(args, open_at):
try:
from calibre.utils.lock import singleinstance
si = singleinstance(singleinstance_name)
except Exception:
import traceback
error_dialog(None, _('Cannot start viewer'), _(
'Failed to start viewer, could not insure only a single instance of the viewer is running. Click "Show Details" for more information'),
det_msg=traceback.format_exc(), show=True)
raise SystemExit(1)
if not si:
if len(args) > 1:
t = RC(print_error=True, socket_address=viewer_socket_address())
t.start()
t.join(3.0)
if t.is_alive() or t.conn is None:
error_dialog(None, _('Connect to viewer failed'), _(
'Unable to connect to existing viewer window, try restarting the viewer.'), show=True)
raise SystemExit(1)
t.conn.send((os.path.abspath(args[1]), open_at))
t.conn.close()
prints('Opened book in existing viewer instance')
raise SystemExit(0)
listener = create_listener()
return listener
def send_message(msg=''):
if msg:
t = RC(print_error=False)
t.start()
t.join(3)
if t.done:
t.conn.send('bookedited:' + msg)
t.conn.close()
def build_pipe(print_error=True):
t = RC(print_error=print_error)
t.start()
t.join(3.0)
if t.is_alive():
cant_start()
raise SystemExit(1)
return t
def send_message(msg=''):
prints('Notifying calibre of the change')
from calibre.utils.ipc import RC
t = RC(print_error=False)
t.start()
t.join(3)
if t.done:
t.conn.send('refreshdb:' + msg)
t.conn.close()
def send_rc_message(msg):
from calibre.utils.ipc import RC
t = RC(print_error=False)
t.start()
t.join(3)
if t.done:
t.conn.send('refreshdb:' + msg)
t.conn.close()
if DEBUG: print('Calibre has been notified of the change...')
def build_pipe(print_error=True):
t = RC(print_error=print_error)
t.start()
t.join(3.0)
if t.is_alive():
if iswindows:
cant_start()
else:
f = os.path.expanduser('~/.calibre_calibre GUI.lock')
cant_start(what=_('try deleting the file') + ': ' + f)
raise SystemExit(1)
return t
def updateCalibreGUIView():
'''
Refresh the GUI view
'''
t = RC(print_error=False)
t.start()
sleep(0.5)
while True:
if t.done:
t.conn.send('refreshdb:')
t.conn.close()
break
sleep(0.5)
def download_finished(self, download_id):
self.central.download_progress.remove_item(download_id)
download_item = self.download_data.pop(download_id)
path = download_item.path()
fname = os.path.basename(path)
if download_item.state() == download_item.DownloadInterrupted:
error_dialog(self, _('Download failed'), _(
'Download of {0} failed with error: {1}').format(fname, download_item.interruptReasonString()), show=True)
return
ext = fname.rpartition('.')[-1].lower()
if ext not in BOOK_EXTENSIONS:
if ext == 'acsm':
if not confirm('<p>' + _(
'This e-book is a DRMed EPUB file. '
'You will be prompted to save this file to your '
'computer. Once it is saved, open it with '
'<a href="https://www.adobe.com/solutions/ebook/digital-editions.html">'
'Adobe Digital Editions</a> (ADE).<p>ADE, in turn '
'will download the actual e-book, which will be a '
'.epub file. You can add this book to calibre '
'using "Add Books" and selecting the file from '
'the ADE library folder.'),
'acsm_download', self):
return
name = choose_save_file(self, 'web-store-download-unknown', _(
'File is not a supported e-book type. Save to disk?'), initial_filename=fname)
if name:
shutil.copyfile(path, name)
os.remove(path)
return
t = RC(print_error=False)
t.start()
t.join(3.0)
if t.conn is None:
error_dialog(self, _('No running calibre'), _(
'No running calibre instance found. Please start calibre before trying to'
' download books.'), show=True)
return
tags = self.data['tags']
if isinstance(tags, string_or_bytes):
tags = list(filter(None, [x.strip() for x in tags.split(',')]))
data = json.dumps({'path': path, 'tags': tags})
if not isinstance(data, bytes):
data = data.encode('utf-8')
t.conn.send(b'web-store:' + data)
t.conn.close()
info_dialog(self, _('Download completed'), _(
'Download of {0} has been completed, the book was added to'
' your calibre library').format(fname), show=True)
def _postimport(self,
book_id,
book_format=None,
db=None,
log=None,
fork_job=True,
abort=None,
notifications=None):
#NODOC IMPORTANT
# TODO: make general overhaul of starting conversion logic
if log: # divert our printing to the caller's logger
prints = log # Log object has __call__ dunder method with INFO level
prints = partial(prints, '{}:'.format(PLUGINNAME))
else:
log = self.prints.func
try:
prints
except NameError:
prints = self.prints
if sys.__stdin__.isatty():
# if run by cli, i.e.:
# calibredb add
# calibredebug -r djvumaker -- convert -i #id
# runs also for GUI if run trough `calibredebug -g`
fork_job = False # DEBUG UNCOMMENT
rpc_refresh = True # use the calibre RPC to signal a GUI refresh
if db is None:
from calibre.library import db # TODO: probably legacy db import, change for new_api
db = db() # initialize calibre library database
if book_format == None:
if not db.has_format(book_id, 'PDF', index_is_id=True):
raise Exception(
'Book with id #{} has not a PDF format.'.format(book_id))
else:
book_format = 'pdf'
if db.has_format(book_id, 'DJVU', index_is_id=True):
prints(
"already have 'DJVU' format document for book ID #{}".format(
book_id))
return None # don't auto convert, we already have a DJVU for this document
path_to_ebook = db.format_abspath(book_id,
book_format,
index_is_id=True)
if book_format == 'pdf':
is_rasterbook_val, pages, images = is_rasterbook(
path_to_ebook, basic_return=False)
if is_rasterbook_val:
pass # TODO: should add a 'scanned' or 'djvumaker' tag
else:
# this is a marked-up/vector-based pdf,
# no advantages to having another copy in DJVU format
prints((
"{} document from book ID #{} determined to be a markup-based ebook,"
" not converting to DJVU").format(book_format, book_id))
return None #no-error in job panel
# TODO: test the DPI to determine if a document is from a broad-sheeted book.
# if so, queue up k2pdfopt to try and chunk the content appropriately to letter size
prints((
"scheduling new {} document from book ID #{} for post-import DJVU"
" conversion: {}").format(book_format, book_id, path_to_ebook))
if fork_job:
#useful for not blocking calibre GUI when large PDFs
# are dropped into the automatic-import-folder
try:
# https://github.com/kovidgoyal/calibre/blob/master/src/calibre/utils/ipc/simple_worker.py
# dispatch API for Worker()
# src/calibre/utils/ipc/launch.py
# Worker() uses sbp.Popen to
# run a second Python to a logfile
# note that Calibre bungs the python loader to check the plugin directory when
# modules with calibre_plugin. prefixed are passed
# https://github.com/kovidgoyal/calibre/blob/master/src/calibre/customize/zipplugin.py#L192
func_name = self.plugin_prefs['use_backend']
args = [
path_to_ebook, log, abort, notifications, pages, images
]
jobret = worker_fork_job(
'calibre_plugins.{}'.format(PLUGINNAME),
func_name,
args=args,
kwargs={'preferences': self.plugin_prefs},
env={'PATH': os.environ['PATH'] + ':/usr/local/bin'},
# djvu and poppler-utils on osx
timeout=600)
# TODO: determine a resonable timeout= based on filesize or
# make a heartbeat= check
# TODO: doesn't work for pdf2djvu, why?
except WorkerError as e:
prints('djvudigital background conversion failed: \n{}'.format(
force_unicode(e.orig_tb)))
raise # ConversionError
except:
prints(traceback.format_exc())
raise
# dump djvudigital output logged in file by the Worker to
# calibre proc's (gui or console) log/stdout
with open(jobret['stdout_stderr'], 'rb') as f:
raw = f.read().strip()
prints(raw)
if jobret['result']:
djvu = jobret['result']
else:
WorkerError("djvu conversion error: %s" % jobret['result'])
# elif hasattr(self, gui): #if we have the calibre gui running,
# we can give it a threadedjob and not use fork_job
else: #!fork_job & !gui
prints("Starts backend")
djvu = self.run_backend(path_to_ebook, log, abort, notifications,
pages, images)
if djvu:
db.new_api.add_format(book_id, 'DJVU', djvu, run_hooks=True)
prints("added new 'DJVU' document to book ID #{}".format(book_id))
if sys.__stdin__.isatty():
# update calibre gui Out-Of-Band. Like if we were run as a command-line scripted import
# this resets current gui views/selections, no cleaner way to do it :-(
from calibre.utils.ipc import RC
t = RC(print_error=False)
t.start()
t.join(3)
if t.done: # GUI is running
t.conn.send('refreshdb:')
t.conn.close()
prints("signalled Calibre GUI refresh")
else:
# TODO: normal Exception propagation instead of passing errors as return values
raise Exception('ConversionError, djvu: {}'.format(djvu))