Merge 9487f4b into 0077d36

plyer/platforms/ios/filechooser.py

@@ -0,0 +1,80 @@
+'''
+IOS file chooser
+--------------------
+
+# TODO
+
+.. versionadded:: 1.4.4
+'''
+
+from plyer.facades import FileChooser
+from pyobjus import autoclass, protocol
+from pyobjus.dylib_manager import load_framework
+
+
+load_framework('/System/Library/Frameworks/Photos.framework')
+
+
+class IOSFileChooser(FileChooser):
+    '''
+    FileChooser implementation for IOS using
+    the built-in file browser via UIImagePickerController.
+
+    .. versionadded:: 1.4.0
+    '''
+
+    def __init__(self, *args, **kwargs):
+        super(IOSFileChooser, self).__init__(*args, **kwargs)
+        self._on_selection = None
+
+    def _file_selection_dialog(self, *args, **kwargs):
+        """
+        Function called when action is required, A "mode" parameter specifies
+        which and is one of "open", "save" or "dir".
+        """
+        self._on_selection = kwargs["on_selection"]
+        if kwargs["mode"] == "open":
+            self._open()
+        else:
+            raise NotImplementedError()
+
+    def _get_picker(self):
+        """
+        Return an instantiated and configured UIImagePickerController.
+        """
+        picker = autoclass("UIImagePickerController")
+        po = picker.alloc().init()
+        po.sourceType = 0
+        po.delegate = self
+        return po
+
+    def _open(self):
+        """
+        Launch the native iOS file browser. Upon selection, the
+        `imagePickerController_didFinishPickingMediaWithInfo_` delegate is
+        called where we close the file browser and handle the result.
+        """
+        picker = self._get_picker()
+        UIApplication = autoclass('UIApplication')
+        vc = UIApplication.sharedApplication().keyWindow.rootViewController()
+        vc.presentViewController_animated_completion_(picker, True, None)
+
+    @protocol('UIImagePickerControllerDelegate')
+    def imagePickerController_didFinishPickingMediaWithInfo_(
+            self, image_picker, frozen_dict):
+        """
+        Delegate which handles the result of the image seletion process.
+        """
+        image_picker.dismissViewControllerAnimated_completion_(True, None)
+
+        # Note: We need to call this Objective C class as there is currently
+        #       no way to call a non-class function via pyobjus. And here,
+        #       we have to use the `UIImagePNGRepresentation` to get the png
+        #       representation.
+        native_image_picker = autoclass("NativeImagePicker").alloc().init()
+        path = native_image_picker.writeToPNG_(frozen_dict)
+        self._on_selection([path.UTF8String()])
+
+
+def instance():
+    return IOSFileChooser()