Merge pull request #138 from kfa/fix_orientation

Fixes iOS orientation bug when app is started in portrait.

src/main/java/com/googlecode/mgwt/ui/client/resource/IOS71BodyBug.java

@@ -18,8 +18,12 @@
 import com.google.gwt.core.shared.GWT;
 import com.google.gwt.dom.client.Document;
 import com.google.gwt.dom.client.StyleInjector;
+import com.google.gwt.event.shared.HandlerRegistration;
 import com.google.gwt.resources.client.ClientBundle;
 import com.google.gwt.resources.client.TextResource;
+import com.googlecode.mgwt.dom.client.event.orientation.OrientationChangeEvent;
+import com.googlecode.mgwt.dom.client.event.orientation.OrientationChangeEvent.ORIENTATION;
+import com.googlecode.mgwt.dom.client.event.orientation.OrientationChangeHandler;
 import com.googlecode.mgwt.ui.client.MGWT;
 
 /**
@@ -31,6 +35,8 @@
  */
 public class IOS71BodyBug {
 
+  private static HandlerRegistration orientationChangeHandler;
+
   interface Resources extends ClientBundle {
 
     Resources INSTANCE = GWT.create(Resources.class);
@@ -40,6 +46,13 @@ interface Resources extends ClientBundle {
   }
 
   public static void applyWorkaround() {
+    // iOS bug fix needs only be applied in portrait orientation.
+    // Fix is deferred until the orientation change event is fired.
+    if (MGWT.getOrientation() == ORIENTATION.PORTRAIT) {
+      registerOrientationChangeEvent();
+      return;
+    }
+
     if (MGWT.getOsDetection().isIPad() || MGWT.getOsDetection().isIPadRetina()) {
       if (isIOS71() && windowInnerHeight() == 672) {
         String text = Resources.INSTANCE.css().getText();
@@ -49,6 +62,17 @@ public static void applyWorkaround() {
     }
   }
 
+  private static void registerOrientationChangeEvent() {
+    orientationChangeHandler = MGWT.addOrientationChangeHandler(new OrientationChangeHandler() {
+
+      @Override
+      public void onOrientationChanged(OrientationChangeEvent event) {
+        orientationChangeHandler = null;
+        applyWorkaround();
+      }
+    });
+  }
+
   private native static boolean isIOS71() /*-{
 		return !!$wnd.navigator.userAgent.match(/iPad;.*CPU.*OS 7_\d/i);
   }-*/;