Merge pull request #152 from owncloud/oauth_login
[pub/Android/ownCloud.git] / src / com / owncloud / android / ui / preview / PreviewImageFragment.java
index fe94f64..8df06bf 100644 (file)
@@ -2,9 +2,8 @@
  *   Copyright (C) 2012-2013 ownCloud Inc. 
  *
  *   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 2 of the License, or
- *   (at your option) any later version.
+ *   it under the terms of the GNU General Public License version 2,
+ *   as published by the Free Software Foundation.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -37,7 +36,6 @@ import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Handler;
 import android.support.v4.app.FragmentStatePagerAdapter;
-import android.util.Log;
 import android.view.Display;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -45,6 +43,7 @@ import android.view.View.OnTouchListener;
 import android.view.ViewGroup;
 import android.webkit.MimeTypeMap;
 import android.widget.ImageView;
+import android.widget.ProgressBar;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -54,7 +53,6 @@ import com.actionbarsherlock.view.MenuInflater;
 import com.actionbarsherlock.view.MenuItem;
 import com.owncloud.android.datamodel.FileDataStorageManager;
 import com.owncloud.android.datamodel.OCFile;
-import com.owncloud.android.network.OwnCloudClientUtils;
 import com.owncloud.android.operations.OnRemoteOperationListener;
 import com.owncloud.android.operations.RemoteOperation;
 import com.owncloud.android.operations.RemoteOperationResult;
@@ -62,8 +60,8 @@ import com.owncloud.android.operations.RemoveFileOperation;
 import com.owncloud.android.ui.fragment.ConfirmationDialogFragment;
 import com.owncloud.android.ui.fragment.FileFragment;
 
+import com.owncloud.android.Log_OC;
 import com.owncloud.android.R;
-import eu.alefzero.webdav.WebdavClient;
 import eu.alefzero.webdav.WebdavUtils;
 
 
@@ -88,6 +86,7 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
     private FileDataStorageManager mStorageManager;
     private ImageView mImageView;
     private TextView mMessageView;
+    private ProgressBar mProgressWheel;
 
     public Bitmap mBitmap = null;
     
@@ -151,9 +150,12 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
         super.onCreateView(inflater, container, savedInstanceState);
         mView = inflater.inflate(R.layout.preview_image_fragment, container, false);
         mImageView = (ImageView)mView.findViewById(R.id.image);
+        mImageView.setVisibility(View.GONE);
         mView.setOnTouchListener((OnTouchListener)getActivity());   // WATCH OUT THAT CAST
         mMessageView = (TextView)mView.findViewById(R.id.message);
         mMessageView.setVisibility(View.GONE);
+        mProgressWheel = (ProgressBar)mView.findViewById(R.id.progressWheel);
+        mProgressWheel.setVisibility(View.VISIBLE);
         return mView;
     }
     
@@ -211,7 +213,7 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
     public void onStart() {
         super.onStart();
         if (mFile != null) {
-           BitmapLoader bl = new BitmapLoader(mImageView, mMessageView);
+           BitmapLoader bl = new BitmapLoader(mImageView, mMessageView, mProgressWheel);
            bl.execute(new String[]{mFile.getStoragePath()});
         }
     }
@@ -277,7 +279,7 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
     @Override
     public void onResume() {
         super.onResume();
-        Log.e(TAG, "FRAGMENT, ONRESUME");
+        //Log.e(TAG, "FRAGMENT, ONRESUME");
         /*
         mDownloadFinishReceiver = new DownloadFinishReceiver();
         IntentFilter filter = new IntentFilter(
@@ -335,7 +337,7 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
             startActivity(i);
             
         } catch (Throwable t) {
-            Log.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + mFile.getMimetype());
+            Log_OC.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + mFile.getMimetype());
             boolean toastIt = true; 
             String mimeType = "";
             try {
@@ -354,13 +356,13 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
                 }
                 
             } catch (IndexOutOfBoundsException e) {
-                Log.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
+                Log_OC.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
                 
             } catch (ActivityNotFoundException e) {
-                Log.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
+                Log_OC.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
                 
             } catch (Throwable th) {
-                Log.e(TAG, "Unexpected problem when opening: " + storagePath, th);
+                Log_OC.e(TAG, "Unexpected problem when opening: " + storagePath, th);
                 
             } finally {
                 if (toastIt) {
@@ -400,8 +402,7 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
             mLastRemoteOperation = new RemoveFileOperation( mFile,      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
                                                             true, 
                                                             mStorageManager);
-            WebdavClient wc = OwnCloudClientUtils.createOwnCloudClient(mAccount, getSherlockActivity().getApplicationContext());
-            mLastRemoteOperation.execute(wc, this, mHandler);
+            mLastRemoteOperation.execute(mAccount, getSherlockActivity(), this, mHandler, getSherlockActivity());
             
             getActivity().showDialog(PreviewImageActivity.DIALOG_SHORT_WAIT);
         }
@@ -476,7 +477,18 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
         private final WeakReference<TextView> mMessageViewRef;
 
         
-        private Throwable mThrowable;
+        /**
+         * Weak reference to the target {@link Progressbar} shown while the load is in progress.
+         * 
+         * Using a weak reference will avoid memory leaks if the target ImageView is retired from memory before the load finishes.
+         */
+        private final WeakReference<ProgressBar> mProgressWheelRef;
+
+        
+        /**
+         * Error message to show when a load fails 
+         */
+        private int mErrorMessageId;
         
         
         /**
@@ -484,10 +496,10 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
          * 
          * @param imageView     Target {@link ImageView} where the bitmap will be loaded into.
          */
-        public BitmapLoader(ImageView imageView, TextView messageView) {
+        public BitmapLoader(ImageView imageView, TextView messageView, ProgressBar progressWheel) {
             mImageViewRef = new WeakReference<ImageView>(imageView);
             mMessageViewRef = new WeakReference<TextView>(messageView);
-            mThrowable = null;
+            mProgressWheelRef = new WeakReference<ProgressBar>(progressWheel);
         }
         
         
@@ -517,14 +529,6 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
                 int height = options.outHeight;
                 int scale = 1;
                 
-                /*
-                if (width >= 2048 || height >= 2048) {  
-                    // try to scale down the image to save memory  
-                    scale = (int) Math.ceil((Math.ceil(Math.max(height, width) / 2048.)));
-                    options.inSampleSize = scale;
-                }
-                */
-                
                 Display display = getActivity().getWindowManager().getDefaultDisplay();
                 Point size = new Point();
                 int screenWidth;
@@ -539,70 +543,91 @@ public class PreviewImageFragment extends SherlockFragment implements   FileFrag
                 }
 
                 if (width > screenWidth) {
-                    // second try to scale down the image , this time depending upon the screen size; WTF... 
-                    scale = (int) Math.ceil((float)width / screenWidth);
-                    options.inSampleSize = scale;
+                    // second try to scale down the image , this time depending upon the screen size 
+                    scale = (int) Math.floor((float)width / screenWidth);
                 }
                 if (height > screenHeight) {
-                    scale = Math.max(scale, (int) Math.ceil((float)height / screenHeight));
+                    scale = Math.max(scale, (int) Math.floor((float)height / screenHeight));
                 }
-                
+                options.inSampleSize = scale;
 
                 // really load the bitmap
                 options.inJustDecodeBounds = false; // the next decodeFile call will be real
                 result = BitmapFactory.decodeFile(storagePath, options);
-                //Log.d(TAG, "Image loaded - width: " + options.outWidth + ", loaded height: " + options.outHeight);
+                //Log_OC.d(TAG, "Image loaded - width: " + options.outWidth + ", loaded height: " + options.outHeight);
 
+                if (result == null) {
+                    mErrorMessageId = R.string.preview_image_error_unknown_format;
+                    Log_OC.e(TAG, "File could not be loaded as a bitmap: " + storagePath);
+                }
+                
+            } catch (OutOfMemoryError e) {
+                mErrorMessageId = R.string.preview_image_error_unknown_format;
+                Log_OC.e(TAG, "Out of memory occured for file " + storagePath, e);
+                    
+            } catch (NoSuchFieldError e) {
+                mErrorMessageId = R.string.common_error_unknown;
+                Log_OC.e(TAG, "Error from access to unexisting field despite protection; file " + storagePath, e);
+                    
             } catch (Throwable t) {
-                result = null;
-                mThrowable = t; // error processing is delayed to #onPostExecute(Bitmap)
-                Log.e(TAG, "Unexpected error while creating image preview " + storagePath, t);
+                mErrorMessageId = R.string.common_error_unknown;
+                Log_OC.e(TAG, "Unexpected error loading " + mFile.getStoragePath(), t);
+                
             }
             return result;
         }
         
         @Override
         protected void onPostExecute(Bitmap result) {
-            if (mImageViewRef != null && result != null) {
+            hideProgressWheel();
+            if (result != null) {
+                showLoadedImage(result);
+            } else {
+                showErrorMessage();
+            }
+        }
+        
+        private void showLoadedImage(Bitmap result) {
+            if (mImageViewRef != null) {
                 final ImageView imageView = mImageViewRef.get();
                 if (imageView != null) {
                     imageView.setImageBitmap(result);
+                    imageView.setVisibility(View.VISIBLE);
                     mBitmap  = result;
-                    if (mMessageViewRef != null) {
-                        final TextView messageView = mMessageViewRef.get();
-                        if (messageView != null) {
-                            messageView.setVisibility(View.GONE);
-                        }
-                    }
                 } // else , silently finish, the fragment was destroyed
-                
-            } else if (mMessageViewRef != null && result == null) {
-                // error
-                int messageId;
-                if (mThrowable == null) {
-                    messageId = R.string.preview_image_error_unknown_format;
-                    Log.e(TAG, "File could not be loaded as a bitmap: " + mFile.getStoragePath());
-                
-                } else if (mThrowable instanceof OutOfMemoryError) {
-                    messageId = R.string.preview_image_error_unknown_format;
-                    Log.e(TAG, "Out of memory occured for file " + mFile.getStoragePath(), mThrowable);
-                    
-                } else if (mThrowable instanceof NoSuchFieldError) {
-                    messageId = R.string.common_error_unknown;
-                    Log.e(TAG, "Error from access to unexisting field despite protection; file " + mFile.getStoragePath(), mThrowable);
-                    
-                } else {
-                    messageId = R.string.common_error_unknown;
-                    Log.e(TAG, "Unexpected error loading " + mFile.getStoragePath(), mThrowable);
-                }
+            }
+            if (mMessageViewRef != null) {
+                final TextView messageView = mMessageViewRef.get();
+                if (messageView != null) {
+                    messageView.setVisibility(View.GONE);
+                } // else , silently finish, the fragment was destroyed
+            }
+        }
+        
+        private void showErrorMessage() {
+            if (mImageViewRef != null) {
+                final ImageView imageView = mImageViewRef.get();
+                if (imageView != null) {
+                    // shows the default error icon
+                    imageView.setVisibility(View.VISIBLE);
+                } // else , silently finish, the fragment was destroyed
+            }
+            if (mMessageViewRef != null) {
                 final TextView messageView = mMessageViewRef.get();
                 if (messageView != null) {
-                    messageView.setText(messageId);
+                    messageView.setText(mErrorMessageId);
                     messageView.setVisibility(View.VISIBLE);
                 } // else , silently finish, the fragment was destroyed
-                    
             }
-            
+        }
+        
+        private void hideProgressWheel() {
+            if (mProgressWheelRef != null) {
+                final ProgressBar progressWheel = mProgressWheelRef.get();
+                if (progressWheel != null) {
+                    progressWheel.setVisibility(View.GONE);
+                }
+            }
         }
         
     }