From 687f9f056e78d309f4b7649e957e183ad1bd60ed Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 23 Oct 2020 20:51:27 +0530
Subject: [PATCH] Windows: Fix drag and drop of long paths onto book list and
 book details panels

---
 src/calibre/gui2/dnd.py                     | 24 ++++++++----
 src/calibre/gui2/library/alternate_views.py | 41 +++++++++++----------
 2 files changed, 38 insertions(+), 27 deletions(-)

diff --git a/src/calibre/gui2/dnd.py b/src/calibre/gui2/dnd.py
index a8d3971da9..6cf3e0fdee 100644
--- a/src/calibre/gui2/dnd.py
+++ b/src/calibre/gui2/dnd.py
@@ -6,20 +6,24 @@ __license__   = 'GPL v3'
 __copyright__ = '2011, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-import posixpath, os, re
+import os
+import posixpath
+import re
+from PyQt5.Qt import (
+    QDialog, QDialogButtonBox, QImageReader, QLabel, QPixmap, QProgressBar, Qt,
+    QTimer, QUrl, QVBoxLayout
+)
 from threading import Thread
 
-from PyQt5.Qt import QPixmap, Qt, QDialog, QLabel, QVBoxLayout, \
-        QDialogButtonBox, QProgressBar, QTimer, QUrl, QImageReader
-
-from calibre.constants import DEBUG
-from calibre.ptempfile import PersistentTemporaryFile
-from calibre import browser, as_unicode, prints
+from calibre import as_unicode, browser, prints
+from calibre.constants import DEBUG, iswindows
 from calibre.gui2 import error_dialog
+from calibre.ptempfile import PersistentTemporaryFile
+from calibre.utils.filenames import make_long_path_useable
 from calibre.utils.imghdr import what
 from polyglot.builtins import unicode_type
+from polyglot.queue import Empty, Queue
 from polyglot.urllib import unquote, urlparse
-from polyglot.queue import Queue, Empty
 
 
 def image_extensions():
@@ -163,6 +167,10 @@ def urls_from_md(md):
 def path_from_qurl(qurl, allow_remote=False):
     lf = qurl.toLocalFile()
     if lf:
+        if iswindows:
+            from calibre_extensions.winutil import get_long_path_name
+            lf = get_long_path_name(lf)
+            lf = make_long_path_useable(lf)
         return lf
     if not allow_remote:
         return ''
diff --git a/src/calibre/gui2/library/alternate_views.py b/src/calibre/gui2/library/alternate_views.py
index 56ea4f0f57..860c9e512f 100644
--- a/src/calibre/gui2/library/alternate_views.py
+++ b/src/calibre/gui2/library/alternate_views.py
@@ -5,29 +5,33 @@
 __license__ = 'GPL v3'
 __copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
 
-import itertools, operator, os, math
-from threading import Event, Thread
+import itertools
+import math
+import operator
+import os
 from functools import wraps
-from textwrap import wrap
-
 from PyQt5.Qt import (
-    QListView, QSize, QStyledItemDelegate, QModelIndex, Qt, QImage, pyqtSignal,
-    QTimer, QColor, QItemSelection, QPixmap, QApplication,
-    QMimeData, QUrl, QDrag, QPoint, QPainter, QRect, pyqtProperty, QEvent,
-    QPropertyAnimation, QEasingCurve, pyqtSlot, QHelpEvent, QAbstractItemView,
-    QStyleOptionViewItem, QToolTip, QByteArray, QBuffer, qRed, qGreen,
-    qBlue, QItemSelectionModel, QIcon, QFont, QTableView, QTreeView)
+    QAbstractItemView, QApplication, QBuffer, QByteArray, QColor, QDrag,
+    QEasingCurve, QEvent, QFont, QHelpEvent, QIcon, QImage, QItemSelection,
+    QItemSelectionModel, QListView, QMimeData, QModelIndex, QPainter, QPixmap,
+    QPoint, QPropertyAnimation, QRect, QSize, QStyledItemDelegate,
+    QStyleOptionViewItem, Qt, QTableView, QTimer, QToolTip, QTreeView, QUrl,
+    pyqtProperty, pyqtSignal, pyqtSlot, qBlue, qGreen, qRed
+)
+from textwrap import wrap
+from threading import Event, Thread
 
-from calibre import fit_image, prints, prepare_string_for_xml, human_readable
+from calibre import fit_image, human_readable, prepare_string_for_xml, prints
 from calibre.constants import DEBUG, config_dir, islinux
-from calibre.gui2.pin_columns import PinContainer
 from calibre.ebooks.metadata import fmt_sidx, rating_to_stars
-from calibre.utils import join_with_timeout
-from calibre.gui2 import gprefs, config, rating_font, empty_index
+from calibre.gui2 import config, empty_index, gprefs, rating_font
+from calibre.gui2.dnd import path_from_qurl
 from calibre.gui2.gestures import GestureManager
 from calibre.gui2.library.caches import CoverCache, ThumbnailCache
+from calibre.gui2.pin_columns import PinContainer
+from calibre.utils import join_with_timeout
 from calibre.utils.config import prefs, tweaks
-from polyglot.builtins import itervalues, unicode_type, range
+from polyglot.builtins import itervalues, range, unicode_type
 from polyglot.queue import LifoQueue
 
 CM_TO_INCH = 0.393701
@@ -246,10 +250,9 @@ def paths_from_event(self, event):
     and represent files with extensions.
     '''
     md = event.mimeData()
-    if md.hasFormat('text/uri-list') and not \
-            md.hasFormat('application/calibre+from_library'):
-        urls = [unicode_type(u.toLocalFile()) for u in md.urls()]
-        return [u for u in urls if os.path.splitext(u)[1] and os.path.exists(u)]
+    if md.hasFormat('text/uri-list') and not md.hasFormat('application/calibre+from_library'):
+        urls = map(path_from_qurl, md.urls())
+        return [u for u in urls if u and os.path.splitext(u)[1] and os.path.exists(u)]
 
 
 def setup_dnd_interface(cls_or_self):