iOS: Allow settings custom input and accessory views through ImPlatformData

Change-Id: Ib802c73f9c9e27853fa0dd25c304d77df570309e
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>

src/plugins/platforms/ios/qiosinputcontext.h

@@ -48,6 +48,9 @@
 #include <QtGui/qtransform.h>
 #include <qpa/qplatforminputcontext.h>
 
+const char kImePlatformDataInputView[] = "inputView";
+const char kImePlatformDataInputAccessoryView[] = "inputAccessoryView";
+
 QT_BEGIN_NAMESPACE
 
 @class QIOSKeyboardListener;

src/plugins/platforms/ios/qiosinputcontext.mm

@@ -420,10 +420,10 @@ void QIOSInputContext::focusWindowChanged(QWindow *focusWindow)
 void QIOSInputContext::update(Qt::InputMethodQueries updatedProperties)
 {
     // Mask for properties that we are interested in and see if any of them changed
-    updatedProperties &= (Qt::ImEnabled | Qt::ImHints | Qt::ImQueryInput);
+    updatedProperties &= (Qt::ImEnabled | Qt::ImHints | Qt::ImQueryInput | Qt::ImPlatformData);
 
     Qt::InputMethodQueries changedProperties = m_imeState.update(updatedProperties);
-    if (changedProperties & (Qt::ImEnabled | Qt::ImHints)) {
+    if (changedProperties & (Qt::ImEnabled | Qt::ImHints | Qt::ImPlatformData)) {
         // Changes to enablement or hints require virtual keyboard reconfigure
         [m_textResponder release];
         m_textResponder = [[QIOSTextInputResponder alloc] initWithInputContext:this];

src/plugins/platforms/ios/qiostextresponder.h

@@ -58,6 +58,9 @@ class QIOSInputContext;
 - (id)initWithInputContext:(QIOSInputContext *)context;
 - (void)notifyInputDelegate:(Qt::InputMethodQueries)updatedProperties;
 
+@property(readwrite, retain) UIView *inputView;
+@property(readwrite, retain) UIView *inputAccessoryView;
+
 // UITextInputTraits
 @property(nonatomic) UITextAutocapitalizationType autocapitalizationType;
 @property(nonatomic) UITextAutocorrectionType autocorrectionType;

src/plugins/platforms/ios/qiostextresponder.mm

@@ -114,6 +114,55 @@
 
 // -------------------------------------------------------------------------
 
+@interface WrapperView : UIView
+@end
+
+@implementation WrapperView
+
+-(id)initWithView:(UIView *)view
+{
+    if (self = [self init]) {
+        [self addSubview:view];
+
+        self.autoresizingMask = view.autoresizingMask;
+
+        [self sizeToFit];
+    }
+
+    return self;
+}
+
+- (void)layoutSubviews
+{
+    UIView* view = [self.subviews firstObject];
+    view.frame = self.bounds;
+
+    // FIXME: During orientation changes the size and position
+    // of the view is not respected by the host view, even if
+    // we call sizeToFit or setNeedsLayout on the superview.
+}
+
+- (CGSize)sizeThatFits:(CGSize)size
+{
+    return [[self.subviews firstObject] sizeThatFits:size];
+}
+
+// By keeping the responder (QIOSTextInputResponder in this case)
+// retained, we ensure that all messages sent to the view during
+// its lifetime in a window hierarcy will be able to traverse the
+// responder chain.
+-(void)willMoveToWindow:(UIWindow *)window
+{
+    if (window)
+        [[self nextResponder] retain];
+    else
+        [[self nextResponder] autorelease];
+}
+
+@end
+
+// -------------------------------------------------------------------------
+
 @implementation QIOSTextInputResponder
 
 - (id)initWithInputContext:(QIOSInputContext *)inputContext
@@ -153,11 +202,19 @@
     else
         self.keyboardType = UIKeyboardTypeDefault;
 
+    QVariantMap platformData = [self imValue:Qt::ImPlatformData].toMap();
+    if (UIView *inputView = static_cast<UIView *>(platformData.value(kImePlatformDataInputView).value<void *>()))
+        self.inputView = [[[WrapperView alloc] initWithView:inputView] autorelease];
+    if (UIView *accessoryView = static_cast<UIView *>(platformData.value(kImePlatformDataInputAccessoryView).value<void *>()))
+        self.inputAccessoryView = [[[WrapperView alloc] initWithView:accessoryView] autorelease];
+
     return self;
 }
 
 - (void)dealloc
 {
+    self.inputView = 0;
+    self.inputAccessoryView = 0;
     [super dealloc];
 }