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      1 package org.robolectric.shadows;
      2 
      3 import android.os.IBinder;
      4 import android.os.ResultReceiver;
      5 import android.view.View;
      6 import android.view.inputmethod.InputMethodManager;
      7 import com.google.common.base.Optional;
      8 import org.robolectric.annotation.HiddenApi;
      9 import org.robolectric.annotation.Implementation;
     10 import org.robolectric.annotation.Implements;
     11 import org.robolectric.shadow.api.Shadow;
     12 
     13 @Implements(value = InputMethodManager.class, callThroughByDefault = false)
     14 public class ShadowInputMethodManager {
     15   /**
     16    * Handler for receiving soft input visibility changed event.
     17    *
     18    * Since Android does not have any API for retrieving soft input status, most application
     19    * relies on GUI layout changes to detect the soft input change event. Currently, Robolectric are
     20    * not able to simulate the GUI change when application changes the soft input through {@code
     21    * InputMethodManager}, this handler can be used by application to simulate GUI change in response
     22    * of the soft input change.
     23    */
     24   public interface SoftInputVisibilityChangeHandler {
     25     void handleSoftInputVisibilityChange(boolean softInputVisible);
     26   }
     27 
     28   private boolean softInputVisible;
     29   private Optional<SoftInputVisibilityChangeHandler> visibilityChangeHandler = Optional.absent();
     30 
     31   @HiddenApi @Implementation
     32   static public InputMethodManager peekInstance() {
     33     return Shadow.newInstanceOf(InputMethodManager.class);
     34   }
     35 
     36   @Implementation
     37   public boolean showSoftInput(View view, int flags) {
     38     return showSoftInput(view, flags, null);
     39   }
     40 
     41   @Implementation
     42   public boolean showSoftInput(View view, int flags, ResultReceiver resultReceiver) {
     43     setSoftInputVisibility(true);
     44     return true;
     45   }
     46 
     47   @Implementation
     48   public boolean hideSoftInputFromWindow(IBinder windowToken, int flags) {
     49     return hideSoftInputFromWindow(windowToken, flags, null);
     50   }
     51 
     52   @Implementation
     53   public boolean hideSoftInputFromWindow(IBinder windowToken, int flags,
     54                        ResultReceiver resultReceiver) {
     55     setSoftInputVisibility(false);
     56     return true;
     57   }
     58 
     59   @Implementation
     60   public void toggleSoftInput(int showFlags, int hideFlags) {
     61     setSoftInputVisibility(!isSoftInputVisible());
     62   }
     63 
     64   public boolean isSoftInputVisible() {
     65     return softInputVisible;
     66   }
     67 
     68   public void setSoftInputVisibilityHandler(
     69       SoftInputVisibilityChangeHandler visibilityChangeHandler) {
     70     this.visibilityChangeHandler =
     71         Optional.<SoftInputVisibilityChangeHandler>of(visibilityChangeHandler);
     72   }
     73 
     74   private void setSoftInputVisibility(boolean visible) {
     75     if (visible == softInputVisible) {
     76       return;
     77     }
     78     softInputVisible = visible;
     79     if (visibilityChangeHandler.isPresent()) {
     80       visibilityChangeHandler.get().handleSoftInputVisibilityChange(softInputVisible);
     81     }
     82   }
     83 }
     84