iOS: add [QUIView updateTextInputTraits]

Configure QUIView text input traits from IM hints
returned by the focus object when the view becomes
first responder. This will affect the layout of the
virtual keyboard.

Change-Id: Ib140ba69d01cc747f3ac3cdd70dd2e7daede26b0
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>

1 files changed, 43 insertions, 9 deletions

diff --git a/src/plugins/platforms/ios/qioswindow.mm b/src/plugins/platforms/ios/qioswindow.mm
index d03889abb6..e53ab189ca 100644
--- a/src/plugins/platforms/ios/qioswindow.mm
+++ b/src/plugins/platforms/ios/qioswindow.mm
@@ -108,15 +108,7 @@
             [NSNumber numberWithBool:YES], kEAGLDrawablePropertyRetainedBacking,
             kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat, nil];
 
-        // Set up text input
-        autocapitalizationType = UITextAutocapitalizationTypeNone;
-        autocorrectionType = UITextAutocorrectionTypeNo;
-        enablesReturnKeyAutomatically = NO;
-        keyboardAppearance = UIKeyboardAppearanceDefault;
-        keyboardType = UIKeyboardTypeDefault;
-        returnKeyType = UIReturnKeyDone;
-        secureTextEntry = NO;
-        m_nextTouchId = 0;
+        [self updateTextInputTraits];
 
         if (isQtApplication())
             self.hidden = YES;
@@ -343,6 +335,7 @@
     // user cannot type. And since the keyboard will open when a view becomes
     // the first responder, it's now a good time to inform QPA that the QWindow
     // this view backs became active:
+    [self updateTextInputTraits];
     QWindowSystemInterface::handleWindowActivated(m_qioswindow->window());
     return [super becomeFirstResponder];
 }
@@ -384,6 +377,47 @@
         0, QEvent::KeyRelease, (int)Qt::Key_Backspace, Qt::NoModifier);
 }
 
+- (void)updateTextInputTraits
+{
+    // Ask the current focus object what kind of input it
+    // expects, and configure the keyboard appropriately:
+    QObject *focusObject = QGuiApplication::focusObject();
+    if (!focusObject)
+        return;
+    QInputMethodQueryEvent queryEvent(Qt::ImEnabled | Qt::ImHints);
+    if (!QCoreApplication::sendEvent(focusObject, &queryEvent))
+        return;
+    if (!queryEvent.value(Qt::ImEnabled).toBool())
+        return;
+
+    Qt::InputMethodHints hints = static_cast<Qt::InputMethodHints>(queryEvent.value(Qt::ImHints).toUInt());
+
+    self.returnKeyType = (hints & Qt::ImhMultiLine) ? UIReturnKeyDefault : UIReturnKeyDone;
+    self.secureTextEntry = BOOL(hints & Qt::ImhHiddenText);
+    self.autocorrectionType = (hints & Qt::ImhNoPredictiveText) ?
+                UITextAutocorrectionTypeNo : UITextAutocorrectionTypeDefault;
+
+    if (hints & Qt::ImhUppercaseOnly)
+        self.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters;
+    else if (hints & Qt::ImhNoAutoUppercase)
+        self.autocapitalizationType = UITextAutocapitalizationTypeNone;
+    else
+        self.autocapitalizationType = UITextAutocapitalizationTypeSentences;
+
+    if (hints & Qt::ImhUrlCharactersOnly)
+        self.keyboardType = UIKeyboardTypeURL;
+    else if (hints & Qt::ImhEmailCharactersOnly)
+        self.keyboardType = UIKeyboardTypeEmailAddress;
+    else if (hints & Qt::ImhDigitsOnly)
+        self.keyboardType = UIKeyboardTypeNumberPad;
+    else if (hints & Qt::ImhFormattedNumbersOnly)
+        self.keyboardType = UIKeyboardTypeDecimalPad;
+    else if (hints & Qt::ImhDialableCharactersOnly)
+        self.keyboardType = UIKeyboardTypeNumberPad;
+    else
+        self.keyboardType = UIKeyboardTypeDefault;
+}
+
 @end
 
 @implementation UIView (QIOS)