add subtle attention seeker to decryptactivity with available clipboard data

Thanks Cyril Mottier

https://plus.google.com/+CyrilMottier/posts/FABaJhRMCuy

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptActivity.java

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Vincent Breitmoser <v.breitmoser@mugenguild.com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,12 +18,22 @@
 
 package org.sufficientlysecure.keychain.ui;
 
+import android.annotation.TargetApi;
 import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.os.Build.VERSION;
+import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import android.view.View;
 
 import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.compatibility.ClipboardReflection;
+import org.sufficientlysecure.keychain.pgp.PgpHelper;
 import org.sufficientlysecure.keychain.service.results.OperationResult;
+import org.sufficientlysecure.keychain.ui.util.SubtleAttentionSeeker;
+
+import java.util.regex.Matcher;
 
 public class DecryptActivity extends DrawerActivity {
 
@@ -56,6 +67,47 @@ public class DecryptActivity extends DrawerActivity {
         });
     }
 
+    @TargetApi(VERSION_CODES.HONEYCOMB)
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        // This is an eye candy ice cream sandwich feature, nvm on versions below
+        if (Build.VERSION.SDK_INT >= VERSION_CODES.ICE_CREAM_SANDWICH) {
+
+            // get text from clipboard
+            final String clipboardText =
+                    ClipboardReflection.getClipboardText(DecryptActivity.this).toString();
+
+            new AsyncTask<Void,Void,Boolean>() {
+                @Override
+                protected Boolean doInBackground(Void... params) {
+
+                    // see if it looks like a pgp thing
+                    Matcher matcher = PgpHelper.PGP_MESSAGE.matcher(clipboardText);
+                    boolean animate = matcher.matches();
+
+                    // see if it looks like another pgp thing
+                    if(!animate) {
+                        matcher = PgpHelper.PGP_CLEARTEXT_SIGNATURE.matcher(clipboardText);
+                        animate = matcher.matches();
+                    }
+                    return animate;
+                }
+
+                @Override
+                protected void onPostExecute(Boolean animate) {
+                    super.onPostExecute(animate);
+
+                    // if so, animate the clipboard icon just a bit~
+                    if(animate) {
+                        SubtleAttentionSeeker.tada(findViewById(R.id.clipboard_icon), 1.5f).start();
+                    }
+                }
+            }.execute();
+        }
+    }
+
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         // if a result has been returned, display a notify

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/SubtleAttentionSeeker.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2014 Vincent Breitmoser <v.breitmoser@mugenguild.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.ui.util;
+
+import android.animation.Keyframe;
+import android.animation.ObjectAnimator;
+import android.animation.PropertyValuesHolder;
+import android.annotation.TargetApi;
+import android.os.Build.VERSION_CODES;
+import android.view.View;
+
+@TargetApi(VERSION_CODES.ICE_CREAM_SANDWICH)
+/** Simple animation helper for subtle attention seeker stuff.
+ *
+ * Code borrowed from Cyril Mottier: https://plus.google.com/+CyrilMottier/posts/FABaJhRMCuy
+ */
+public class SubtleAttentionSeeker {
+
+    public static ObjectAnimator tada(View view) {
+        return tada(view, 1f);
+    }
+
+    public static ObjectAnimator tada(View view, float shakeFactor) {
+
+        PropertyValuesHolder pvhScaleX = PropertyValuesHolder.ofKeyframe(View.SCALE_X,
+                Keyframe.ofFloat(0f, 1f),
+                Keyframe.ofFloat(.1f, .9f),
+                Keyframe.ofFloat(.2f, .9f),
+                Keyframe.ofFloat(.3f, 1.1f),
+                Keyframe.ofFloat(.4f, 1.1f),
+                Keyframe.ofFloat(.5f, 1.1f),
+                Keyframe.ofFloat(.6f, 1.1f),
+                Keyframe.ofFloat(.7f, 1.1f),
+                Keyframe.ofFloat(.8f, 1.1f),
+                Keyframe.ofFloat(.9f, 1.1f),
+                Keyframe.ofFloat(1f, 1f)
+        );
+
+        PropertyValuesHolder pvhScaleY = PropertyValuesHolder.ofKeyframe(View.SCALE_Y,
+                Keyframe.ofFloat(0f, 1f),
+                Keyframe.ofFloat(.1f, .9f),
+                Keyframe.ofFloat(.2f, .9f),
+                Keyframe.ofFloat(.3f, 1.1f),
+                Keyframe.ofFloat(.4f, 1.1f),
+                Keyframe.ofFloat(.5f, 1.1f),
+                Keyframe.ofFloat(.6f, 1.1f),
+                Keyframe.ofFloat(.7f, 1.1f),
+                Keyframe.ofFloat(.8f, 1.1f),
+                Keyframe.ofFloat(.9f, 1.1f),
+                Keyframe.ofFloat(1f, 1f)
+        );
+
+        PropertyValuesHolder pvhRotate = PropertyValuesHolder.ofKeyframe(View.ROTATION,
+                Keyframe.ofFloat(0f, 0f),
+                Keyframe.ofFloat(.1f, -3f * shakeFactor),
+                Keyframe.ofFloat(.2f, -3f * shakeFactor),
+                Keyframe.ofFloat(.3f, 3f * shakeFactor),
+                Keyframe.ofFloat(.4f, -3f * shakeFactor),
+                Keyframe.ofFloat(.5f, 3f * shakeFactor),
+                Keyframe.ofFloat(.6f, -3f * shakeFactor),
+                Keyframe.ofFloat(.7f, 3f * shakeFactor),
+                Keyframe.ofFloat(.8f, -3f * shakeFactor),
+                Keyframe.ofFloat(.9f, 3f * shakeFactor),
+                Keyframe.ofFloat(1f, 0)
+        );
+
+        return ObjectAnimator.ofPropertyValuesHolder(view, pvhScaleX, pvhScaleY, pvhRotate).
+                setDuration(1400);
+    }
+
+}

OpenKeychain/src/main/res/layout/decrypt_content.xml

@@ -88,6 +88,7 @@
             </LinearLayout>
 
             <ImageView
+                android:id="@+id/clipboard_icon"
                 android:layout_width="wrap_content"
                 android:layout_height="match_parent"
                 android:padding="8dp"