fix external gif sharing

fixes #4539
Closes #4556
// FREEBIE

src/org/thoughtcrime/securesms/ConversationActivity.java

@@ -157,6 +157,7 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
   public static final String THREAD_ID_EXTRA         = "thread_id";
   public static final String DRAFT_TEXT_EXTRA        = "draft_text";
   public static final String DRAFT_IMAGE_EXTRA       = "draft_image";
+  public static final String DRAFT_GIF_EXTRA         = "draft_gif";
   public static final String DRAFT_AUDIO_EXTRA       = "draft_audio";
   public static final String DRAFT_VIDEO_EXTRA       = "draft_video";
   public static final String DISTRIBUTION_TYPE_EXTRA = "distribution_type";
@@ -710,12 +711,14 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
 
   private void initializeDraft() {
     String draftText  = getIntent().getStringExtra(DRAFT_TEXT_EXTRA);
+    Uri    draftGif   = getIntent().getParcelableExtra(DRAFT_GIF_EXTRA);
     Uri    draftImage = getIntent().getParcelableExtra(DRAFT_IMAGE_EXTRA);
     Uri    draftAudio = getIntent().getParcelableExtra(DRAFT_AUDIO_EXTRA);
     Uri    draftVideo = getIntent().getParcelableExtra(DRAFT_VIDEO_EXTRA);
 
     if (draftText != null)  composeText.setText(draftText);
 
+    if      (draftGif   != null) setMedia(draftGif,   MediaType.GIF);
     if      (draftImage != null) setMedia(draftImage, MediaType.IMAGE);
     else if (draftAudio != null) setMedia(draftAudio, MediaType.AUDIO);
     else if (draftVideo != null) setMedia(draftVideo, MediaType.VIDEO);

src/org/thoughtcrime/securesms/ShareActivity.java

@@ -36,6 +36,7 @@ import org.thoughtcrime.securesms.providers.PersistentBlobProvider;
 import org.thoughtcrime.securesms.recipients.Recipients;
 import org.thoughtcrime.securesms.util.DynamicLanguage;
 import org.thoughtcrime.securesms.util.DynamicTheme;
+import org.thoughtcrime.securesms.util.MediaUtil;
 import org.thoughtcrime.securesms.util.ViewUtil;
 
 import java.io.IOException;
@@ -188,7 +189,9 @@ public class ShareActivity extends PassphraseRequiredActionBarActivity
     final String type        = streamExtra != null ? getMimeType(streamExtra) : getIntent().getType();
 
     if (resolvedExtra != null) {
-      if (ContentType.isImageType(type)) {
+      if (MediaUtil.isGif(type)) {
+        intent.putExtra(ConversationActivity.DRAFT_GIF_EXTRA, resolvedExtra);
+      } else if (ContentType.isImageType(type)) {
         intent.putExtra(ConversationActivity.DRAFT_IMAGE_EXTRA, resolvedExtra);
       } else if (ContentType.isAudioType(type)) {
         intent.putExtra(ConversationActivity.DRAFT_AUDIO_EXTRA, resolvedExtra);

src/org/thoughtcrime/securesms/mms/GifSlide.java

@@ -10,6 +10,7 @@ import org.thoughtcrime.securesms.crypto.MasterSecret;
 import java.io.IOException;
 import java.io.InputStream;
 
+import ws.com.google.android.mms.ContentType;
 import ws.com.google.android.mms.pdu.PduPart;
 
 public class GifSlide extends ImageSlide {
@@ -18,8 +19,8 @@ public class GifSlide extends ImageSlide {
     super(context, attachment);
   }
 
-  public GifSlide(Context context, Uri uri, long dataSize) throws IOException {
+  public GifSlide(Context context, Uri uri, long size) throws IOException {
-    super(context, uri, dataSize);
+    super(context, constructAttachmentFromUri(context, uri, ContentType.IMAGE_GIF, size));
   }
 
   @Override