add support for showing animated gifs in imagePreview

[pub/Android/ownCloud.git] / src / com / owncloud / android / ui / preview / ImageViewCustom.java

diff --git a/src/com/owncloud/android/ui/preview/ImageViewCustom.java b/src/com/owncloud/android/ui/preview/ImageViewCustom.java
index ad85140..e249bd0 100644 (file)
--- a/src/com/owncloud/android/ui/preview/ImageViewCustom.java
+++ b/src/com/owncloud/android/ui/preview/ImageViewCustom.java
@@ -4,20 +4,36 @@ import android.annotation.SuppressLint;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
+import android.graphics.Movie;
 import android.os.Build;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.ImageView;
 
+import com.owncloud.android.datamodel.OCFile;
 import com.owncloud.android.lib.common.utils.Log_OC;
 
+import java.io.FileInputStream;
+import java.io.InputStream;
+
 public class ImageViewCustom extends ImageView {
-    
+
+    private static final String TAG = ImageViewCustom.class.getSimpleName();
+
     private static final boolean IS_ICS_OR_HIGHER = Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;
-    
-    private Bitmap mBitmap;
+    private static final boolean IS_VERSION_BUGGY_ON_RECYCLES =
+            Build.VERSION.SDK_INT == Build.VERSION_CODES.JELLY_BEAN_MR1 ||
+            Build.VERSION.SDK_INT == Build.VERSION_CODES.JELLY_BEAN_MR2;
+
+    private int mBitmapHeight;
+    private int mBitmapWidth;
+
+    private Movie gifMovie;
+    private int movieWidth, movieHeight;
+    private long movieDuration;
+    private long movieRunDuration;
+    private long lastTick;
 
-    
     public ImageViewCustom(Context context) {
         super(context);
     }
@@ -33,38 +49,92 @@ public class ImageViewCustom extends ImageView {
     @SuppressLint("NewApi")
        @Override
     protected void onDraw(Canvas canvas) {
-
-        if(IS_ICS_OR_HIGHER && checkIfMaximumBitmapExceed(canvas)) {
-            // Set layer type to software one for avoiding exceed
-            // and problems in visualization
+        if(IS_ICS_OR_HIGHER && checkIfMaximumBitmapExceed(canvas) || IS_VERSION_BUGGY_ON_RECYCLES ) {
+            // Software type is set with two targets:
+            // 1. prevent that bitmaps larger than maximum textures allowed are shown as black views in devices
+            //  with LAYER_TYPE_HARDWARE enabled by default;
+            // 2. grant that bitmaps are correctly de-allocated from memory in versions suffering the bug fixed in
+            //  https://android.googlesource.com/platform/frameworks/base/+/034de6b1ec561797a2422314e6ef03e3cd3e08e0;
+            //
             setLayerType(View.LAYER_TYPE_SOFTWARE, null);
         }
 
-        super.onDraw(canvas);
+        if(gifMovie == null){
+            super.onDraw(canvas);
+        } else {
+            long nowTick = android.os.SystemClock.uptimeMillis();
+            if (lastTick == 0) {
+                movieRunDuration = 0;
+            } else {
+                movieRunDuration += nowTick -lastTick;
+                if(movieRunDuration > movieDuration){
+                        movieRunDuration = 0;
+                }
+            }
+
+            gifMovie.setTime((int) movieRunDuration);
+
+            float scale;
+            if(gifMovie.height() > getHeight() || gifMovie.width() > getWidth()) {
+                scale = (1f / Math.min(canvas.getHeight() / gifMovie.height(),
+                        canvas.getWidth() / gifMovie.width())) + 0.25f;
+            } else {
+                scale = Math.min(canvas.getHeight() / gifMovie.height(),
+                                 canvas.getWidth() / gifMovie.width());
+            }
+
+            canvas.scale(scale, scale);
+            canvas.translate(((float) getWidth() / scale - (float) gifMovie.width()) / 2f,
+                    ((float) getHeight() / scale - (float) gifMovie.height()) /2f);
+
+            gifMovie.draw(canvas, 0, 0);
+
+            lastTick = nowTick;
+            invalidate();
+        }
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        setMeasuredDimension(movieWidth, movieHeight);
     }
 
     /**
      * Checks if current bitmaps exceed the maximum OpenGL texture size limit
-     * @param bitmap
-     * @return boolean
+     * @param canvas        Canvas where the view will be drawn into.
+     * @return boolean      True means that the bitmap is too big for the canvas.
      */
     @SuppressLint("NewApi")
        private boolean checkIfMaximumBitmapExceed(Canvas canvas) {
-        Log_OC.d("OC", "Canvas maximum: " + canvas.getMaximumBitmapWidth() + " - " + canvas.getMaximumBitmapHeight());
-        if (mBitmap!= null && (mBitmap.getWidth() > canvas.getMaximumBitmapWidth() 
-                || mBitmap.getHeight() > canvas.getMaximumBitmapHeight())) {
-            return true;
-        }
-        
-        return false;
+        return mBitmapWidth > canvas.getMaximumBitmapWidth()
+                || mBitmapHeight > canvas.getMaximumBitmapHeight();
+
     }
     
+    @Override
     /**
-     * Set current bitmap
-     * @param bitmap
+     * Keeps the size of the bitmap cached in member variables for faster access in {@link #onDraw(Canvas)} ,
+     * but without keeping another reference to the {@link Bitmap}
      */
-    public void setBitmap (Bitmap bitmap) {
-        mBitmap = bitmap;
+    public void setImageBitmap(Bitmap bm) {
+        mBitmapWidth = bm.getWidth();
+        mBitmapHeight = bm.getHeight();
+        super.setImageBitmap(bm);
+    }
+
+    public void setGifImage(OCFile file){
+      try {
+          InputStream gifInputStream = new FileInputStream(file.getStoragePath());
+          setLayerType(View.LAYER_TYPE_SOFTWARE, null);
+          setFocusable(true);
+
+          gifMovie = Movie.decodeStream(gifInputStream);
+          movieWidth = gifMovie.width();
+          movieHeight = gifMovie.height();
+          movieDuration = gifMovie.duration();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
     }
 
 }