Windows Performance Improvement & Multi-Item support (#43)

* Initial IFileOperation for Windows

- Try using IFileOperation instead of SHFileOperation
  - Use pywin32 to accomplish this
  - Implement fallback when pywin32 not available
- Handles paths like `C:\` just fine bu the `\\?\` paths in the test
  cause issue
- Add batching for IFileOperation version (performance)
- Minor formatting applied by editor

* Fix issue with paths starting with \\?\

- Strip these characters off if present just like old implementation

* Add windows version check, legacy list support

- Add check for windows version for IFileOperation
- Add list support to legacy version
- Remove some debugging code
- Fix bug in path converson

Not sure if there is a better way to layout this file

* Split plat_win into legacy and modern

* Update other platforms for list support

Formatter also ran on these so some other minor changes.

* Add unit tests for multi-file calls

tests/test_plat_win.py

@@ -9,12 +9,16 @@ from tempfile import gettempdir
 from send2trash import send2trash as s2t
 
 
-@unittest.skipIf(sys.platform != 'win32', 'Windows only')
+@unittest.skipIf(sys.platform != "win32", "Windows only")
 class TestNormal(unittest.TestCase):
     def setUp(self):
-        self.dirname = '\\\\?\\' + op.join(gettempdir(), 'python.send2trash')
-        self.file = op.join(self.dirname, 'testfile.txt')
+        self.dirname = "\\\\?\\" + op.join(gettempdir(), "python.send2trash")
+        self.file = op.join(self.dirname, "testfile.txt")
         self._create_tree(self.file)
+        self.files = [
+            op.join(self.dirname, "testfile{}.txt".format(index)) for index in range(10)
+        ]
+        [self._create_tree(file) for file in self.files]
 
     def tearDown(self):
         shutil.rmtree(self.dirname, ignore_errors=True)
@@ -23,29 +27,38 @@ class TestNormal(unittest.TestCase):
         dirname = op.dirname(path)
         if not op.isdir(dirname):
             os.makedirs(dirname)
-        with open(path, 'w') as writer:
-            writer.write('send2trash test')
+        with open(path, "w") as writer:
+            writer.write("send2trash test")
 
     def test_trash_file(self):
         s2t(self.file)
         self.assertFalse(op.exists(self.file))
 
+    def test_trash_multifile(self):
+        s2t(self.files)
+        self.assertFalse(any([op.exists(file) for file in self.files]))
+
     def test_file_not_found(self):
-        file = op.join(self.dirname, 'otherfile.txt')
+        file = op.join(self.dirname, "otherfile.txt")
         self.assertRaises(WindowsError, s2t, file)
 
-@unittest.skipIf(sys.platform != 'win32', 'Windows only')
+
+@unittest.skipIf(sys.platform != "win32", "Windows only")
 class TestLongPath(unittest.TestCase):
     def setUp(self):
-        filename = 'A' * 100
-        self.dirname = '\\\\?\\' + op.join(gettempdir(), filename)
-        self.file = op.join(
+        filename = "A" * 100
+        self.dirname = "\\\\?\\" + op.join(gettempdir(), filename)
+        path = op.join(
             self.dirname,
             filename,
             filename,  # From there, the path is not trashable from Explorer
             filename,
-            filename + '.txt')
+            filename + "{}.txt",
+        )
+        self.file = path.format("")
         self._create_tree(self.file)
+        self.files = [path.format(index) for index in range(10)]
+        [self._create_tree(file) for file in self.files]
 
     def tearDown(self):
         shutil.rmtree(self.dirname, ignore_errors=True)
@@ -54,16 +67,21 @@ class TestLongPath(unittest.TestCase):
         dirname = op.dirname(path)
         if not op.isdir(dirname):
             os.makedirs(dirname)
-        with open(path, 'w') as writer:
-            writer.write('Looong filename!')
+        with open(path, "w") as writer:
+            writer.write("Looong filename!")
 
     def test_trash_file(self):
         s2t(self.file)
         self.assertFalse(op.exists(self.file))
 
+    def test_trash_multifile(self):
+        s2t(self.files)
+        self.assertFalse(any([op.exists(file) for file in self.files]))
+
     @unittest.skipIf(
         op.splitdrive(os.getcwd())[0] != op.splitdrive(gettempdir())[0],
-        'Cannot trash long path from other drive')
+        "Cannot trash long path from other drive",
+    )
     def test_trash_folder(self):
         s2t(self.dirname)
         self.assertFalse(op.exists(self.dirname))