# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et: # Copyright 2014-2016 Florian Bruhin (The Compiler) # # This file is part of qutebrowser. # # qutebrowser is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # qutebrowser is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with qutebrowser. If not, see . """Shared QtWebKit/QtWebEngine code for downloads.""" import sys import shlex import html import os.path import collections import functools import tempfile import sip from PyQt5.QtCore import (pyqtSlot, pyqtSignal, Qt, QObject, QUrl, QModelIndex, QTimer, QAbstractListModel) from PyQt5.QtGui import QDesktopServices from qutebrowser.commands import cmdexc, cmdutils from qutebrowser.config import config from qutebrowser.utils import (usertypes, standarddir, utils, message, log, qtutils) from qutebrowser.misc import guiprocess ModelRole = usertypes.enum('ModelRole', ['item'], start=Qt.UserRole, is_int=True) # Remember the last used directory last_used_directory = None # All REFRESH_INTERVAL milliseconds, speeds will be recalculated and downloads # redrawn. _REFRESH_INTERVAL = 500 class UnsupportedAttribute: """Class which is used to create attributes which are not supported. This is used for attributes like "fileobj" for downloads which are not supported with QtWebengine. """ pass class UnsupportedOperationError(Exception): """Raised when an operation is not supported with the given backend.""" def download_dir(): """Get the download directory to use.""" directory = config.get('storage', 'download-directory') remember_dir = config.get('storage', 'remember-download-directory') if remember_dir and last_used_directory is not None: return last_used_directory elif directory is None: return standarddir.download() else: return directory def immediate_download_path(prompt_download_directory=None): """Try to get an immediate download path without asking the user. If that's possible, we return a path immediately. If not, None is returned. Args: prompt_download_directory: If this is something else than None, it will overwrite the storage->prompt-download-directory setting. """ if prompt_download_directory is None: prompt_download_directory = config.get('storage', 'prompt-download-directory') if not prompt_download_directory: return download_dir() def _path_suggestion(filename): """Get the suggested file path. Args: filename: The filename to use if included in the suggestion. """ suggestion = config.get('completion', 'download-path-suggestion') if suggestion == 'path': # add trailing '/' if not present return os.path.join(download_dir(), '') elif suggestion == 'filename': return filename elif suggestion == 'both': return os.path.join(download_dir(), filename) else: # pragma: no cover raise ValueError("Invalid suggestion value {}!".format(suggestion)) def create_full_filename(basename, filename): """Create a full filename based on the given basename and filename. Args: basename: The basename to use if filename is a directory. filename: The path to a folder or file where you want to save. Return: The full absolute path, or None if filename creation was not possible. """ # Remove chars which can't be encoded in the filename encoding. # See https://github.com/The-Compiler/qutebrowser/issues/427 encoding = sys.getfilesystemencoding() filename = utils.force_encoding(filename, encoding) basename = utils.force_encoding(basename, encoding) if os.path.isabs(filename) and os.path.isdir(filename): # We got an absolute directory from the user, so we save it under # the default filename in that directory. return os.path.join(filename, basename) elif os.path.isabs(filename): # We got an absolute filename from the user, so we save it under # that filename. return filename return None def get_filename_question(*, suggested_filename, url, parent=None): """Get a Question object for a download-path. Args: suggested_filename: The "default"-name that is pre-entered as path. url: The URL the download originated from. parent: The parent of the question (a QObject). """ encoding = sys.getfilesystemencoding() suggested_filename = utils.force_encoding(suggested_filename, encoding) q = usertypes.Question(parent) q.title = "Save file to:" q.text = "Please enter a location for {}".format( html.escape(url.toDisplayString())) q.mode = usertypes.PromptMode.text q.completed.connect(q.deleteLater) q.default = _path_suggestion(suggested_filename) return q class NoFilenameError(Exception): """Raised when we can't find out a filename in DownloadTarget.""" # Where a download should be saved class _DownloadTarget: """Abstract base class for different download targets.""" def __init__(self): raise NotImplementedError def suggested_filename(self): """Get the suggested filename for this download target.""" raise NotImplementedError class FileDownloadTarget(_DownloadTarget): """Save the download to the given file. Attributes: filename: Filename where the download should be saved. """ def __init__(self, filename): # pylint: disable=super-init-not-called self.filename = filename def suggested_filename(self): return os.path.basename(self.filename) class FileObjDownloadTarget(_DownloadTarget): """Save the download to the given file-like object. Attributes: fileobj: File-like object where the download should be written to. """ def __init__(self, fileobj): # pylint: disable=super-init-not-called self.fileobj = fileobj def suggested_filename(self): try: return self.fileobj.name except AttributeError: raise NoFilenameError class OpenFileDownloadTarget(_DownloadTarget): """Save the download in a temp dir and directly open it. Attributes: cmdline: The command to use as string. A `{}` is expanded to the filename. None means to use the system's default application. If no `{}` is found, the filename is appended to the cmdline. """ def __init__(self, cmdline=None): # pylint: disable=super-init-not-called self.cmdline = cmdline def suggested_filename(self): raise NoFilenameError class DownloadItemStats(QObject): """Statistics (bytes done, total bytes, time, etc.) about a download. Class attributes: SPEED_AVG_WINDOW: How many seconds of speed data to average to estimate the remaining time. Attributes: done: How many bytes there are already downloaded. total: The total count of bytes. None if the total is unknown. speed: The current download speed, in bytes per second. _speed_avg: A rolling average of speeds. _last_done: The count of bytes which where downloaded when calculating the speed the last time. """ SPEED_AVG_WINDOW = 30 def __init__(self, parent=None): super().__init__(parent) self.total = None self.done = 0 self.speed = 0 self._last_done = 0 samples = int(self.SPEED_AVG_WINDOW * (1000 / _REFRESH_INTERVAL)) self._speed_avg = collections.deque(maxlen=samples) def update_speed(self): """Recalculate the current download speed. The caller needs to guarantee this is called all _REFRESH_INTERVAL ms. """ if self.done is None: # this can happen for very fast downloads, e.g. when actually # opening a file return delta = self.done - self._last_done self.speed = delta * 1000 / _REFRESH_INTERVAL self._speed_avg.append(self.speed) self._last_done = self.done def finish(self): """Set the download stats as finished.""" self.done = self.total def percentage(self): """The current download percentage, or None if unknown.""" if self.done == self.total: return 100 elif self.total == 0 or self.total is None: return None else: return 100 * self.done / self.total def remaining_time(self): """The remaining download time in seconds, or None.""" if self.total is None or not self._speed_avg: # No average yet or we don't know the total size. return None remaining_bytes = self.total - self.done avg = sum(self._speed_avg) / len(self._speed_avg) if avg == 0: # Download stalled return None else: return remaining_bytes / avg @pyqtSlot('qint64', 'qint64') def on_download_progress(self, bytes_done, bytes_total): """Update local variables when the download progress changed. Args: bytes_done: How many bytes are downloaded. bytes_total: How many bytes there are to download in total. """ if bytes_total in [0, -1]: # QtWebEngine, QtWebKit bytes_total = None self.done = bytes_done self.total = bytes_total class AbstractDownloadItem(QObject): """Shared QtNetwork/QtWebEngine part of a download item. Attributes: done: Whether the download is finished. stats: A DownloadItemStats object. index: The index of the download in the view. successful: Whether the download has completed successfully. error_msg: The current error message, or None fileobj: The file object to download the file to. raw_headers: The headers sent by the server. _filename: The filename of the download. _dead: Whether the Download has _die()'d. Signals: data_changed: The downloads metadata changed. finished: The download was finished. cancelled: The download was cancelled. error: An error with the download occurred. arg: The error message as string. remove_requested: Emitted when the removal of this download was requested. """ data_changed = pyqtSignal() finished = pyqtSignal() error = pyqtSignal(str) cancelled = pyqtSignal() remove_requested = pyqtSignal() def __init__(self, parent=None): super().__init__(parent) self.done = False self.stats = DownloadItemStats(self) self.index = 0 self.error_msg = None self.basename = '???' self.successful = False self.fileobj = UnsupportedAttribute() self.raw_headers = UnsupportedAttribute() self._filename = None self._dead = False def __repr__(self): return utils.get_repr(self, basename=self.basename) def __str__(self): """Get the download as a string. Example: foo.pdf [699.2kB/s|0.34|16%|4.253/25.124] """ speed = utils.format_size(self.stats.speed, suffix='B/s') down = utils.format_size(self.stats.done, suffix='B') perc = self.stats.percentage() remaining = self.stats.remaining_time() if self.error_msg is None: errmsg = "" else: errmsg = " - {}".format(self.error_msg) if all(e is None for e in [perc, remaining, self.stats.total]): return ('{index}: {name} [{speed:>10}|{down}]{errmsg}'.format( index=self.index, name=self.basename, speed=speed, down=down, errmsg=errmsg)) perc = round(perc) if remaining is None: remaining = '?' else: remaining = utils.format_seconds(remaining) total = utils.format_size(self.stats.total, suffix='B') if self.done: return ('{index}: {name} [{perc:>2}%|{total}]{errmsg}'.format( index=self.index, name=self.basename, perc=perc, total=total, errmsg=errmsg)) else: return ('{index}: {name} [{speed:>10}|{remaining:>5}|{perc:>2}%|' '{down}/{total}]{errmsg}'.format( index=self.index, name=self.basename, speed=speed, remaining=remaining, perc=perc, down=down, total=total, errmsg=errmsg)) def _do_die(self): """Do cleanup steps after a download has died.""" raise NotImplementedError def _die(self, msg): """Abort the download and emit an error.""" assert not self.successful # Prevent actions if calling _die() twice. # # For QtWebKit, this might happen if the error handler correctly # connects, and the error occurs in _init_reply between # reply.error.connect and the reply.error() check. In this case, the # connected error handlers will be called twice, once via the direct # error.emit() and once here in _die(). The stacks look like this then: # # -> on_reply_error -> _die -> # self.error.emit() # # and # # [_init_reply -> ->] -> # self.error.emit() # # which may lead to duplicate error messages (and failing tests) if self._dead: return self._dead = True self._do_die() self.error_msg = msg self.stats.finish() self.error.emit(msg) self.done = True self.data_changed.emit() def get_status_color(self, position): """Choose an appropriate color for presenting the download's status. Args: position: The color type requested, can be 'fg' or 'bg'. """ # pylint: disable=bad-config-call # WORKAROUND for https://bitbucket.org/logilab/astroid/issue/104/ assert position in ["fg", "bg"] start = config.get('colors', 'downloads.{}.start'.format(position)) stop = config.get('colors', 'downloads.{}.stop'.format(position)) system = config.get('colors', 'downloads.{}.system'.format(position)) error = config.get('colors', 'downloads.{}.error'.format(position)) if self.error_msg is not None: assert not self.successful return error elif self.stats.percentage() is None: return start else: return utils.interpolate_color(start, stop, self.stats.percentage(), system) def _do_cancel(self): """Actual cancel implementation.""" raise NotImplementedError @pyqtSlot() def cancel(self, *, remove_data=True): """Cancel the download. Args: remove_data: Whether to remove the downloaded data. """ self._do_cancel() log.downloads.debug("cancelled") if remove_data: self.delete() self.done = True self.finished.emit() self.data_changed.emit() @pyqtSlot() def remove(self): """Remove the download from the model.""" self.remove_requested.emit() def delete(self): """Delete the downloaded file.""" try: if self._filename is not None and os.path.exists(self._filename): os.remove(self._filename) log.downloads.debug("Deleted {}".format(self._filename)) else: log.downloads.debug("Not deleting {}".format(self._filename)) except OSError: log.downloads.exception("Failed to remove partial file") @pyqtSlot() def retry(self): """Retry a failed download.""" raise NotImplementedError def _get_open_filename(self): """Get the filename to open a download. Returns None if no suitable filename was found. """ raise NotImplementedError @pyqtSlot() def open_file(self, cmdline=None): """Open the downloaded file. Args: cmdline: The command to use as string. A `{}` is expanded to the filename. None means to use the system's default application. If no `{}` is found, the filename is appended to the cmdline. """ assert self.successful filename = self._get_open_filename() if filename is None: # pragma: no cover log.downloads.error("No filename to open the download!") return if cmdline is None: log.downloads.debug("Opening {} with the system application" .format(filename)) url = QUrl.fromLocalFile(filename) QDesktopServices.openUrl(url) return cmd, *args = shlex.split(cmdline) args = [arg.replace('{}', filename) for arg in args] if '{}' not in cmdline: args.append(filename) log.downloads.debug("Opening {} with {}" .format(filename, [cmd] + args)) proc = guiprocess.GUIProcess(what='download') proc.start_detached(cmd, args) def _ensure_can_set_filename(self, filename): """Make sure we can still set a filename.""" raise NotImplementedError def _after_set_filename(self): """Finish initialization based on self._filename.""" raise NotImplementedError def _ask_confirm_question(self, title, msg): """Ask a confirmation question for the download.""" raise NotImplementedError def _set_fileobj(self, fileobj, *, autoclose=True): """Set a file object to save the download to. Not supported by QtWebEngine. Args: fileobj: The file object to download to. autoclose: Close the file object automatically when it's done. """ raise NotImplementedError def _set_tempfile(self, fileobj): """Set a temporary file when opening the download.""" raise NotImplementedError def _set_filename(self, filename, *, force_overwrite=False): """Set the filename to save the download to. Args: filename: The full filename to save the download to. None: special value to stop the download. force_overwrite: Force overwriting existing files. """ global last_used_directory filename = os.path.expanduser(filename) self._ensure_can_set_filename(filename) self._filename = create_full_filename(self.basename, filename) if self._filename is None: # We only got a filename (without directory) or a relative path # from the user, so we append that to the default directory and # try again. self._filename = create_full_filename( self.basename, os.path.join(download_dir(), filename)) # At this point, we have a misconfigured XDG_DOWNLOAD_DIR, as # download_dir() + filename is still no absolute path. # The config value is checked for "absoluteness", but # ~/.config/user-dirs.dirs may be misconfigured and a non-absolute path # may be set for XDG_DOWNLOAD_DIR if self._filename is None: message.error( "XDG_DOWNLOAD_DIR points to a relative path - please check" " your ~/.config/user-dirs.dirs. The download is saved in" " your home directory.", ) # fall back to $HOME as download_dir self._filename = create_full_filename(self.basename, os.path.expanduser('~')) self.basename = os.path.basename(self._filename) last_used_directory = os.path.dirname(self._filename) log.downloads.debug("Setting filename to {}".format(filename)) if force_overwrite: self._after_set_filename() elif os.path.isfile(self._filename): # The file already exists, so ask the user if it should be # overwritten. txt = "{} already exists. Overwrite?".format( html.escape(self._filename)) self._ask_confirm_question("Overwrite existing file?", txt) # FIFO, device node, etc. Make sure we want to do this elif (os.path.exists(self._filename) and not os.path.isdir(self._filename)): txt = ("{} already exists and is a special file. Write to " "it anyways?".format(html.escape(self._filename))) self._ask_confirm_question("Overwrite special file?", txt) else: self._after_set_filename() def _open_if_successful(self, cmdline): """Open the downloaded file, but only if it was successful. Args: cmdline: Passed to DownloadItem.open_file(). """ if not self.successful: log.downloads.debug("{} finished but not successful, not opening!" .format(self)) return self.open_file(cmdline) def set_target(self, target): """Set the target for a given download. Args: target: The DownloadTarget for this download. """ if isinstance(target, FileObjDownloadTarget): self._set_fileobj(target.fileobj, autoclose=False) elif isinstance(target, FileDownloadTarget): self._set_filename(target.filename) elif isinstance(target, OpenFileDownloadTarget): try: fobj = temp_download_manager.get_tmpfile(self.basename) except OSError as exc: msg = "Download error: {}".format(exc) message.error(msg) self.cancel() return self.finished.connect( functools.partial(self._open_if_successful, target.cmdline)) self._set_tempfile(fobj) else: # pragma: no cover raise ValueError("Unsupported download target: {}".format(target)) class AbstractDownloadManager(QObject): """Backend-independent download manager code. Attributes: downloads: A list of active DownloadItems. _networkmanager: A NetworkManager for generic downloads. Signals: begin_remove_row: Emitted before downloads are removed. end_remove_row: Emitted after downloads are removed. begin_insert_row: Emitted before downloads are inserted. end_insert_row: Emitted after downloads are inserted. data_changed: Emitted when the data of the model changed. The argument is the index of the changed download """ begin_remove_row = pyqtSignal(int) end_remove_row = pyqtSignal() begin_insert_row = pyqtSignal(int) end_insert_row = pyqtSignal() data_changed = pyqtSignal(int) def __init__(self, parent=None): super().__init__(parent) self.downloads = [] self._update_timer = usertypes.Timer(self, 'download-update') self._update_timer.timeout.connect(self._update_gui) self._update_timer.setInterval(_REFRESH_INTERVAL) def __repr__(self): return utils.get_repr(self, downloads=len(self.downloads)) @pyqtSlot() def _update_gui(self): """Periodical GUI update of all items.""" assert self.downloads for dl in self.downloads: dl.stats.update_speed() self.data_changed.emit(-1) def _init_item(self, download, auto_remove, suggested_filename): """Initialize a newly created DownloadItem.""" download.cancelled.connect(download.remove) download.remove_requested.connect(functools.partial( self._remove_item, download)) delay = config.get('ui', 'remove-finished-downloads') if delay > -1: download.finished.connect( lambda: QTimer.singleShot(delay, download.remove)) elif auto_remove: download.finished.connect(download.remove) download.data_changed.connect( functools.partial(self._on_data_changed, download)) download.error.connect(self._on_error) download.basename = suggested_filename idx = len(self.downloads) download.index = idx + 1 # "Human readable" index self.begin_insert_row.emit(idx) self.downloads.append(download) self.end_insert_row.emit() if not self._update_timer.isActive(): self._update_timer.start() @pyqtSlot(AbstractDownloadItem) def _on_data_changed(self, download): """Emit data_changed signal when download data changed.""" try: idx = self.downloads.index(download) except ValueError: # download has been deleted in the meantime return self.data_changed.emit(idx) @pyqtSlot(str) def _on_error(self, msg): """Display error message on download errors.""" message.error("Download error: {}".format(msg)) @pyqtSlot(AbstractDownloadItem) def _remove_item(self, download): """Remove a given download.""" if sip.isdeleted(self): # https://github.com/The-Compiler/qutebrowser/issues/1242 return try: idx = self.downloads.index(download) except ValueError: # already removed return self.begin_remove_row.emit(idx) del self.downloads[idx] self.end_remove_row.emit() download.deleteLater() self._update_indexes() if not self.downloads: self._update_timer.stop() log.downloads.debug("Removed download {}".format(download)) def _update_indexes(self): """Update indexes of all DownloadItems.""" for i, d in enumerate(self.downloads, 1): d.index = i self.data_changed.emit(-1) def _init_filename_question(self, question, download): """Set up an existing filename question with a download.""" question.mode = usertypes.PromptMode.download question.answered.connect(download.set_target) question.cancelled.connect(download.cancel) download.cancelled.connect(question.abort) download.error.connect(question.abort) class DownloadModel(QAbstractListModel): """A list model showing downloads.""" def __init__(self, qtnetwork_manager, webengine_manager=None, parent=None): super().__init__(parent) self._qtnetwork_manager = qtnetwork_manager self._webengine_manager = webengine_manager qtnetwork_manager.data_changed.connect( functools.partial(self._on_data_changed, webengine=False)) qtnetwork_manager.begin_insert_row.connect( functools.partial(self._on_begin_insert_row, webengine=False)) qtnetwork_manager.begin_remove_row.connect( functools.partial(self._on_begin_remove_row, webengine=False)) qtnetwork_manager.end_insert_row.connect(self.endInsertRows) qtnetwork_manager.end_remove_row.connect(self.endRemoveRows) if webengine_manager is not None: webengine_manager.data_changed.connect( functools.partial(self._on_data_changed, webengine=True)) webengine_manager.begin_insert_row.connect( functools.partial(self._on_begin_insert_row, webengine=True)) webengine_manager.begin_remove_row.connect( functools.partial(self._on_begin_remove_row, webengine=True)) webengine_manager.end_insert_row.connect(self.endInsertRows) webengine_manager.end_remove_row.connect(self.endRemoveRows) def _all_downloads(self): """Combine downloads from both downloaders.""" if self._webengine_manager is None: return self._qtnetwork_manager.downloads[:] else: return (self._qtnetwork_manager.downloads + self._webengine_manager.downloads) def __len__(self): return len(self._all_downloads()) def __iter__(self): return iter(self._all_downloads()) def __getitem__(self, idx): return self._all_downloads()[idx] def _on_begin_insert_row(self, idx, webengine=False): log.downloads.debug("_on_begin_insert_row with idx {}, " "webengine {}".format(idx, webengine)) if idx == -1: self.beginInsertRows(QModelIndex(), 0, -1) return assert idx >= 0, idx if webengine: idx += len(self._qtnetwork_manager.downloads) self.beginInsertRows(QModelIndex(), idx, idx) def _on_begin_remove_row(self, idx, webengine=False): log.downloads.debug("_on_begin_remove_row with idx {}, " "webengine {}".format(idx, webengine)) if idx == -1: self.beginRemoveRows(QModelIndex(), 0, -1) return assert idx >= 0, idx if webengine: idx += len(self._qtnetwork_manager.downloads) self.beginRemoveRows(QModelIndex(), idx, idx) def _on_data_changed(self, idx, *, webengine): """Called when a downloader's data changed. Args: start: The first changed index as int. end: The last changed index as int, or -1 for all indices. webengine: If given, the QtNetwork download length is added to the index. """ if idx == -1: start_index = self.index(0, 0) end_index = self.last_index() else: if webengine: idx += len(self._qtnetwork_manager.downloads) start_index = self.index(idx, 0) end_index = self.index(idx, 0) qtutils.ensure_valid(start_index) qtutils.ensure_valid(end_index) self.dataChanged.emit(start_index, end_index) def _raise_no_download(self, count): """Raise an exception that the download doesn't exist. Args: count: The index of the download """ if not count: raise cmdexc.CommandError("There's no download!") raise cmdexc.CommandError("There's no download {}!".format(count)) @cmdutils.register(instance='download-model', scope='window') @cmdutils.argument('count', count=True) def download_cancel(self, all_=False, count=0): """Cancel the last/[count]th download. Args: all_: Cancel all running downloads count: The index of the download to cancel. """ downloads = self._all_downloads() if all_: for download in downloads: if not download.done: download.cancel() else: try: download = downloads[count - 1] except IndexError: self._raise_no_download(count) if download.done: if not count: count = len(self) raise cmdexc.CommandError("Download {} is already done!" .format(count)) download.cancel() @cmdutils.register(instance='download-model', scope='window') @cmdutils.argument('count', count=True) def download_delete(self, count=0): """Delete the last/[count]th download from disk. Args: count: The index of the download to delete. """ try: download = self[count - 1] except IndexError: self._raise_no_download(count) if not download.successful: if not count: count = len(self) raise cmdexc.CommandError("Download {} is not done!".format(count)) download.delete() download.remove() log.downloads.debug("deleted download {}".format(download)) @cmdutils.register(instance='download-model', scope='window', maxsplit=0) @cmdutils.argument('count', count=True) def download_open(self, cmdline: str=None, count=0): """Open the last/[count]th download. If no specific command is given, this will use the system's default application to open the file. Args: cmdline: The command which should be used to open the file. A `{}` is expanded to the temporary file name. If no `{}` is present, the filename is automatically appended to the cmdline. count: The index of the download to open. """ try: download = self[count - 1] except IndexError: self._raise_no_download(count) if not download.successful: if not count: count = len(self) raise cmdexc.CommandError("Download {} is not done!".format(count)) download.open_file(cmdline) @cmdutils.register(instance='download-model', scope='window') @cmdutils.argument('count', count=True) def download_retry(self, count=0): """Retry the first failed/[count]th download. Args: count: The index of the download to retry. """ if count: try: download = self[count - 1] except IndexError: self._raise_no_download(count) if download.successful or not download.done: raise cmdexc.CommandError("Download {} did not fail!".format( count)) else: to_retry = [d for d in self if d.done and not d.successful] if not to_retry: raise cmdexc.CommandError("No failed downloads!") else: download = to_retry[0] download.retry() def can_clear(self): """Check if there are finished downloads to clear.""" return any(download.done for download in self) @cmdutils.register(instance='download-model', scope='window') def download_clear(self): """Remove all finished downloads from the list.""" for download in self: if download.done: download.remove() @cmdutils.register(instance='download-model', scope='window') @cmdutils.argument('count', count=True) def download_remove(self, all_=False, count=0): """Remove the last/[count]th download from the list. Args: all_: Remove all finished downloads. count: The index of the download to remove. """ if all_: self.download_clear() else: try: download = self[count - 1] except IndexError: self._raise_no_download(count) if not download.done: if not count: count = len(self) raise cmdexc.CommandError("Download {} is not done!" .format(count)) download.remove() def running_downloads(self): """Return the amount of still running downloads. Return: The number of unfinished downloads. """ return sum(1 for download in self if not download.done) def last_index(self): """Get the last index in the model. Return: A (possibly invalid) QModelIndex. """ idx = self.index(self.rowCount() - 1) return idx def headerData(self, section, orientation, role=Qt.DisplayRole): """Simple constant header.""" if (section == 0 and orientation == Qt.Horizontal and role == Qt.DisplayRole): return "Downloads" else: return "" def data(self, index, role): """Download data from DownloadManager.""" if not index.isValid(): return None if index.parent().isValid() or index.column() != 0: return None item = self[index.row()] if role == Qt.DisplayRole: data = str(item) elif role == Qt.ForegroundRole: data = item.get_status_color('fg') elif role == Qt.BackgroundRole: data = item.get_status_color('bg') elif role == ModelRole.item: data = item elif role == Qt.ToolTipRole: if item.error_msg is None: data = None else: return item.error_msg else: data = None return data def flags(self, index): """Override flags so items aren't selectable. The default would be Qt.ItemIsEnabled | Qt.ItemIsSelectable. """ if not index.isValid(): return Qt.ItemFlags() return Qt.ItemIsEnabled | Qt.ItemNeverHasChildren def rowCount(self, parent=QModelIndex()): """Get count of active downloads.""" if parent.isValid(): # We don't have children return 0 return len(self) class TempDownloadManager: """Manager to handle temporary download files. The downloads are downloaded to a temporary location and then openened with the system standard application. The temporary files are deleted when qutebrowser is shutdown. Attributes: files: A list of NamedTemporaryFiles of downloaded items. """ def __init__(self): self.files = [] self._tmpdir = None def cleanup(self): """Clean up any temporary files.""" if self._tmpdir is not None: try: self._tmpdir.cleanup() except OSError: log.misc.exception("Failed to clean up temporary download " "directory") self._tmpdir = None def _get_tmpdir(self): """Return the temporary directory that is used for downloads. The directory is created lazily on first access. Return: The tempfile.TemporaryDirectory that is used. """ if self._tmpdir is None: self._tmpdir = tempfile.TemporaryDirectory( prefix='qutebrowser-downloads-') return self._tmpdir def get_tmpfile(self, suggested_name): """Return a temporary file in the temporary downloads directory. The files are kept as long as qutebrowser is running and automatically cleaned up at program exit. Args: suggested_name: str of the "suggested"/original filename. Used as a suffix, so any file extenions are preserved. Return: A tempfile.NamedTemporaryFile that should be used to save the file. """ tmpdir = self._get_tmpdir() encoding = sys.getfilesystemencoding() suggested_name = utils.force_encoding(suggested_name, encoding) # Make sure that the filename is not too long suggested_name = utils.elide_filename(suggested_name, 50) fobj = tempfile.NamedTemporaryFile(dir=tmpdir.name, delete=False, suffix=suggested_name) self.files.append(fobj) return fobj temp_download_manager = TempDownloadManager()