Fixed ThumbnailView sizing problems.

Glide will use the dimensions of the target ImageView as the dimensions
for the image it's loading. This caused problems in the case of
ThumbnailView, as we were constantly changing the ImageView dimensions,
meaning Glide may not have the most recent values (it may be called in
between measure calls, for instance).

To solve this, we now will always override the default image dimensions
when we load an image. If no dimensions are present, we will default to
the layout_width and layout_height of the ThumbnailView.

Fixes #7810

src/org/thoughtcrime/securesms/components/ThumbnailView.java

@@ -10,6 +10,7 @@ import android.util.AttributeSet;
 import android.util.Log;
 import android.util.Pair;
 import android.view.View;
+import android.view.ViewGroup;
 import android.widget.FrameLayout;
 import android.widget.ImageView;
 
@@ -225,10 +226,6 @@ public class ThumbnailView extends FrameLayout {
                                boolean showControls, boolean isPreview, int naturalWidth,
                                int naturalHeight)
   {
-    dimens[WIDTH]  = naturalWidth;
-    dimens[HEIGHT] = naturalHeight;
-    invalidate();
-
     if (showControls) {
       getTransferControls().setSlide(slide);
       getTransferControls().setDownloadClickListener(new DownloadClickDispatcher());
@@ -263,6 +260,10 @@ public class ThumbnailView extends FrameLayout {
 
     this.slide = slide;
 
+    dimens[WIDTH]  = naturalWidth;
+    dimens[HEIGHT] = naturalHeight;
+    invalidate();
+
     if      (slide.getThumbnailUri() != null) buildThumbnailGlideRequest(glideRequests, slide).into(image);
     else if (slide.hasPlaceholder())          buildPlaceholderGlideRequest(glideRequests, slide).into(image);
     else                                      glideRequests.clear(image);
@@ -316,14 +317,31 @@ public class ThumbnailView extends FrameLayout {
                         .diskCacheStrategy(DiskCacheStrategy.NONE), new FitCenter());
   }
 
-  private GlideRequest applySizing(@NonNull GlideRequest request, @NonNull BitmapTransformation unavailableDimensSizing) {
+  private GlideRequest applySizing(@NonNull GlideRequest request, @NonNull BitmapTransformation fitting) {
     int[] size = new int[2];
     fillTargetDimensions(size, dimens, bounds);
     if (size[WIDTH] == 0 && size[HEIGHT] == 0) {
-      return request.transforms(unavailableDimensSizing, new RoundedCorners(radius));
+      size[WIDTH]  = getDefaultWidth();
+      size[HEIGHT] = getDefaultHeight();
     }
     return request.override(size[WIDTH], size[HEIGHT])
-                  .transforms(new CenterCrop(), new RoundedCorners(radius));
+                  .transforms(fitting, new RoundedCorners(radius));
+  }
+
+  private int getDefaultWidth() {
+    ViewGroup.LayoutParams params = getLayoutParams();
+    if (params != null) {
+      return Math.max(params.width, 0);
+    }
+    return 0;
+  }
+
+  private int getDefaultHeight() {
+    ViewGroup.LayoutParams params = getLayoutParams();
+    if (params != null) {
+      return Math.max(params.height, 0);
+    }
+    return 0;
   }
 
   private class ThumbnailClickDispatcher implements View.OnClickListener {