Fix some print UI issues.

1. Fixed a crash when orientation changes and the content
   is scrolled due to wrong size bitmap being requested.

2. Closed a file dscriptior that was being left open.

3. Clearing the bitmap before passing it to the renderer to
   ensure it is white for pixels not touched when rendering.

4. Removed debug logs.

5. Switched to the correct layout manager for RecyclerView.

bug:16966145

Change-Id: I8ab9d22635c93cac5ff85c6f4b5d82e58cd8df5c

packages/PrintSpooler/src/com/android/printspooler/model/PageContentRepository.java

@@ -24,13 +24,14 @@ import android.content.ServiceConnection;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Color;
-import android.graphics.Rect;
 import android.graphics.drawable.BitmapDrawable;
 import android.os.AsyncTask;
 import android.os.IBinder;
 import android.os.ParcelFileDescriptor;
 import android.os.RemoteException;
 import android.print.PrintAttributes;
+import android.print.PrintAttributes.MediaSize;
+import android.print.PrintAttributes.Margins;
 import android.print.PrintDocumentInfo;
 import android.util.ArrayMap;
 import android.util.Log;
@@ -41,7 +42,6 @@ import com.android.printspooler.renderer.PdfRendererService;
 import dalvik.system.CloseGuard;
 import libcore.io.IoUtils;
 
-import java.io.FileDescriptor;
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
@@ -354,13 +354,14 @@ public final class PageContentRepository {
     public static final class RenderSpec {
         final int bitmapWidth;
         final int bitmapHeight;
-        final PrintAttributes printAttributes;
+        final PrintAttributes printAttributes = new PrintAttributes.Builder().build();
 
         public RenderSpec(int bitmapWidth, int bitmapHeight,
-                PrintAttributes printAttributes) {
+                MediaSize mediaSize, Margins minMargins) {
             this.bitmapWidth = bitmapWidth;
             this.bitmapHeight = bitmapHeight;
-            this.printAttributes = printAttributes;
+            printAttributes.setMediaSize(mediaSize);
+            printAttributes.setMinMargins(minMargins);
         }
 
         @Override
@@ -505,6 +506,10 @@ public final class PageContentRepository {
                         } catch (RemoteException re) {
                             Log.e(LOG_TAG, "Cannot open PDF document");
                             return MALFORMED_PDF_FILE_ERROR;
+                        } finally {
+                            // Close the fd as we passed it to another process
+                            // which took ownership.
+                            IoUtils.closeQuietly(source);
                         }
                     }
                 }

packages/PrintSpooler/src/com/android/printspooler/model/RemotePrintDocument.java

@@ -55,7 +55,7 @@ import java.util.Arrays;
 public final class RemotePrintDocument {
     private static final String LOG_TAG = "RemotePrintDocument";
 
-    private static final boolean DEBUG = true;
+    private static final boolean DEBUG = false;
 
     private static final int STATE_INITIAL = 0;
     private static final int STATE_STARTED = 1;

packages/PrintSpooler/src/com/android/printspooler/renderer/PdfRendererService.java

@@ -20,6 +20,7 @@ import android.app.Service;
 import android.content.Intent;
 import android.content.res.Configuration;
 import android.graphics.Bitmap;
+import android.graphics.Color;
 import android.graphics.Matrix;
 import android.graphics.Rect;
 import android.graphics.pdf.PdfRenderer;
@@ -171,11 +172,13 @@ public final class PdfRendererService extends Service {
         private Bitmap getBitmapForSize(int width, int height) {
             if (mBitmap != null) {
                 if (mBitmap.getWidth() == width && mBitmap.getHeight() == height) {
+                    mBitmap.eraseColor(Color.WHITE);
                     return mBitmap;
                 }
                 mBitmap.recycle();
             }
             mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+            mBitmap.eraseColor(Color.WHITE);
             return mBitmap;
         }
 

packages/PrintSpooler/src/com/android/printspooler/ui/PrintPreviewController.java

@@ -24,6 +24,7 @@ import android.print.PageRange;
 import android.print.PrintAttributes.MediaSize;
 import android.print.PrintAttributes.Margins;
 import android.print.PrintDocumentInfo;
+import android.support.v7.widget.GridLayoutManager;
 import android.support.v7.widget.OrientationHelper;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.RecyclerView.ViewHolder;
@@ -51,7 +52,7 @@ class PrintPreviewController implements MutexFileProvider.OnReleaseRequestCallba
     private final MyHandler mHandler;
 
     private final PageAdapter mPageAdapter;
-    private final StaggeredGridLayoutManager mLayoutManger;
+    private final GridLayoutManager mLayoutManger;
 
     private final PrintOptionsLayout mPrintOptionsLayout;
     private final RecyclerView mRecyclerView;
@@ -73,7 +74,7 @@ class PrintPreviewController implements MutexFileProvider.OnReleaseRequestCallba
         final int columnCount = mActivity.getResources().getInteger(
                 R.integer.preview_page_per_row_count);
 
-        mLayoutManger = new StaggeredGridLayoutManager(columnCount, OrientationHelper.VERTICAL);
+        mLayoutManger = new GridLayoutManager(mActivity, columnCount);
 
         mRecyclerView = (RecyclerView) activity.findViewById(R.id.preview_content);
         mRecyclerView.setLayoutManager(mLayoutManger);

packages/PrintSpooler/src/com/android/printspooler/widget/PageContentView.java

@@ -20,7 +20,6 @@ import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.ColorDrawable;
-import android.print.PrintAttributes;
 import android.print.PrintAttributes.MediaSize;
 import android.print.PrintAttributes.Margins;
 import android.util.AttributeSet;
@@ -39,14 +38,18 @@ import com.android.printspooler.model.PageContentRepository.RenderSpec;
 public class PageContentView extends View
         implements PageContentRepository.OnPageContentAvailableCallback {
 
-    private final PrintAttributes mAttributes = new PrintAttributes.Builder().build();
-
     private final ColorDrawable mEmptyState;
 
     private PageContentProvider mProvider;
 
+    private MediaSize mMediaSize;
+
+    private Margins mMinMargins;
+
     private boolean mContentRequested;
 
+    private boolean mNeedsLayout;
+
     public PageContentView(Context context, AttributeSet attrs) {
         super(context, attrs);
 
@@ -68,6 +71,7 @@ public class PageContentView extends View
     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         super.onLayout(changed, left, top, right, bottom);
+        mNeedsLayout = false;
         requestPageContentIfNeeded();
     }
 
@@ -83,18 +87,23 @@ public class PageContentView extends View
     }
 
     public void init(PageContentProvider provider, MediaSize mediaSize, Margins minMargins) {
-        if (mProvider == null ? provider == null : mProvider.equals(provider)
-                && ((mAttributes.getMediaSize() == null)
-                        ? mediaSize == null : mAttributes.getMediaSize().equals(mediaSize))
-                && ((mAttributes.getMinMargins() == null)
-                        ? minMargins == null : mAttributes.getMinMargins().equals(minMargins))) {
+        final boolean providerChanged = (mProvider == null)
+                ? provider != null : !mProvider.equals(provider);
+        final boolean mediaSizeChanged = (mMediaSize == null)
+                ? mediaSize != null : !mMediaSize.equals(mediaSize);
+        final boolean marginsChanged = (mMinMargins == null)
+                ? minMargins != null : !mMinMargins.equals(minMargins);
+
+        if (!providerChanged && !mediaSizeChanged && !marginsChanged) {
             return;
         }
 
         mProvider = provider;
-        mAttributes.setMediaSize(mediaSize);
-        mAttributes.setMinMargins(minMargins);
+        mMediaSize = mediaSize;
+        mMinMargins = minMargins;
+
         mContentRequested = false;
+        mNeedsLayout = mNeedsLayout || mediaSizeChanged || marginsChanged;
 
         // If there is no provider we want immediately to switch to
         // the empty state, so pages with no content appear blank.
@@ -106,9 +115,11 @@ public class PageContentView extends View
     }
 
     private void requestPageContentIfNeeded() {
-        if (getWidth() > 0 && getHeight() > 0 && !mContentRequested && mProvider != null) {
+        if (getWidth() > 0 && getHeight() > 0 && !mContentRequested
+                && mProvider != null && !mNeedsLayout) {
             mContentRequested = true;
-            mProvider.getPageContent(new RenderSpec(getWidth(), getHeight(), mAttributes), this);
+            mProvider.getPageContent(new RenderSpec(getWidth(), getHeight(),
+                    mMediaSize, mMinMargins), this);
         }
     }
 }