Composable Shell touch keyboard: support emoji panel in Windows 10 Fa…

…ll Creators Update. re nvaccess#7273.

In Windows 10 Fall Creators Update, people using United States English keyboard can use the keyboard to search for and enter emojis (Windows+period or Windows+semicolon). At the moment the app module has been added, with emoji candidates raising UIA element selected event.
Things to be aware of:
* When the emoji panel first opens, the first emoji isn't announced in some cases.
* When searching for emojis, intermediate search results are not announced.

source/appModules/windowsinternal_composableshell_experiences_textinput_inputapp.py

@@ -0,0 +1,32 @@
+# App module for Composable Shell (CShell) input panel
+#A part of NonVisual Desktop Access (NVDA)
+#Copyright (C) 2017 NV Access Limited, Joseph Lee
+#This file is covered by the GNU General Public License.
+#See the file COPYING for more details.
+
+"""App module for Windows 10 new touch keyboard panel.
+The chief feature is allowing NVDA to announce selected emoji when using the keyboard to search for and select one.
+This is applicable on Windows 10 Fall Creators Update."""
+
+import appModuleHandler
+import api
+import speech
+import braille
+import ui
+
+class AppModule(appModuleHandler.AppModule):
+
+	def event_UIA_elementSelected(self, obj, nextHandler):
+		# #7273: When this is fired on categories, the first emoji from the new category is selected but not announced.
+		# Therefore, move the navigator object to that item if possible.
+		speech.cancelSpeech()
+		if obj.UIAElement.cachedClassName == "ListViewItem":
+			obj = obj.parent.previous.firstChild
+		if obj is not None:
+			api.setNavigatorObject(obj)
+			obj.reportFocus()
+			braille.handler.message(braille.getBrailleTextForProperties(name=obj.name, role=obj.role, positionInfo=obj.positionInfo))
+		else:
+			# Translators: presented when there is no emoji when searching for one in Windows 10 Fall Creators Update and later.
+			ui.message(_("No emoji"))
+		nextHandler()