android: cleanly load/close a document when activity starts/stops

Change-Id: I2206a2b6818c030ba756f2b4d014a20d46f4106e

android/experimental/LOAndroid3/src/java/org/libreoffice/LOEvent.java

@@ -12,17 +12,24 @@ public class LOEvent {
     public static final int VIEWPORT = 3;
     public static final int DRAW = 4;
     public static final int CHANGE_PART = 5;
+    public static final int LOAD = 6;
+
     public int mType;
-    ViewportMetrics viewportMetrics;
     private ViewportMetrics mViewportMetrics;
     private String mTypeString;
     private int mPartIndex;
+    private String mFilename;
 
     public LOEvent(int type, int widthPixels, int heightPixels, int tileWidth, int tileHeight) {
         mType = type;
         mTypeString = "Size Changed: " + widthPixels + " " + heightPixels;
     }
 
+    public LOEvent(int type, String filename) {
+        mType = type;
+        mFilename = filename;
+    }
+
     public LOEvent(int type, IntSize tileSize) {
         mType = type;
         mTypeString = "Tile size";
@@ -65,6 +72,10 @@ public class LOEvent {
         return new LOEvent(CHANGE_PART, part);
     }
 
+    public static LOEvent load(String inputFile) {
+        return new LOEvent(LOAD, inputFile);
+    }
+
     public String getTypeString() {
         return mTypeString;
     }
@@ -76,4 +87,9 @@ public class LOEvent {
     public int getPartIndex() {
         return mPartIndex;
     }
+
+    public String getFilename() {
+        return mFilename;
+    }
+
 }

android/experimental/LOAndroid3/src/java/org/libreoffice/LOKitShell.java

@@ -38,4 +38,5 @@ public class LOKitShell {
     public static Handler getMainHandler() {
         return LibreOfficeMainActivity.mAppContext.mMainHandler;
     }
+
 }

android/experimental/LOAndroid3/src/java/org/libreoffice/LOKitThread.java

@@ -22,21 +22,19 @@ public class LOKitThread extends Thread {
     private LibreOfficeMainActivity mApplication;
     private TileProvider mTileProvider;
     private ViewportMetrics mViewportMetrics;
-    private String mInputFile;
     private Rect mOldRect;
     private boolean mCheckboardImageSet = false;
 
-    LOKitThread(String inputFile) {
-        mInputFile = inputFile;
+    public LOKitThread() {
     }
 
-    RectF normlizeRect(ImmutableViewportMetrics metrics) {
+    private RectF normlizeRect(ImmutableViewportMetrics metrics) {
         RectF rect = metrics.getViewport();
         float zoomFactor = metrics.zoomFactor;
         return new RectF(rect.left / zoomFactor, rect.top / zoomFactor, rect.right / zoomFactor, rect.bottom / zoomFactor);
     }
 
-    Rect roundToTileSize(RectF input, int tileSize) {
+    private Rect roundToTileSize(RectF input, int tileSize) {
         int minX = (Math.round(input.left)    / tileSize) * tileSize;
         int minY = (Math.round(input.top)     / tileSize) * tileSize;
         int maxX = ((Math.round(input.right)  / tileSize) + 1) * tileSize;
@@ -44,7 +42,7 @@ public class LOKitThread extends Thread {
         return new Rect(minX, minY, maxX, maxY);
     }
 
-    Rect inflate(Rect rect, int inflateSize) {
+    private Rect inflate(Rect rect, int inflateSize) {
         Rect newRect = new Rect(rect);
         newRect.left -= inflateSize;
         newRect.left = newRect.left < 0 ? 0 : newRect.left;
@@ -130,12 +128,22 @@ public class LOKitThread extends Thread {
         LOKitShell.sendEvent(LOEvent.draw(new Rect()));
     }
 
-    private boolean initialize() {
+    private boolean load(String filename) {
+        if (mApplication == null) {
             mApplication = LibreOfficeMainActivity.mAppContext;
-        mTileProvider = new LOKitTileProvider(mApplication.getLayerController(), mInputFile);
+        }
+        if (mTileProvider != null) {
+            mTileProvider.close();
+        }
+        mTileProvider = new LOKitTileProvider(mApplication.getLayerController(), filename);
         boolean isReady = mTileProvider.isReady();
-        if (isReady)
-        {
+        if (isReady) {
+            updateCheckbardImage();
+        }
+        return isReady;
+    }
+
+    private void updateCheckbardImage() {
         if (!mCheckboardImageSet) {
             Log.i(LOGTAG, "Generate thumbnail!");
             Bitmap bitmap = mTileProvider.thumbnail();
@@ -148,23 +156,21 @@ public class LOKitThread extends Thread {
             }
         }
     }
-        return isReady;
-    }
 
     public void run() {
-        if (initialize()) {
         try {
-                boolean drawn = false;
             while (true) {
                 processEvent(mEventQueue.take());
             }
         } catch (InterruptedException ex) {
         }
     }
-    }
 
     private void processEvent(LOEvent event) throws InterruptedException {
         switch (event.mType) {
+            case LOEvent.LOAD:
+                load(event.getFilename());
+                break;
             case LOEvent.VIEWPORT:
                 mViewportMetrics = event.getViewport();
                 draw();

android/experimental/LOAndroid3/src/java/org/libreoffice/LOKitTileProvider.java

@@ -21,6 +21,7 @@ public class LOKitTileProvider implements TileProvider {
     private final LayerController mLayerController;
     private final double mTileWidth;
     private final double mTileHeight;
+    private final String mInputFile;
 
     private double mDPI;
     private double mWidthTwip;
@@ -37,6 +38,7 @@ public class LOKitTileProvider implements TileProvider {
 
         mOffice = new Office(LibreOfficeKit.getLibreOfficeKitHandle());
 
+        mInputFile = input;
         mDocument = mOffice.documentLoad(input);
 
         if (checkDocument()) {
@@ -110,7 +112,11 @@ public class LOKitTileProvider implements TileProvider {
         ByteBuffer buffer = ByteBuffer.allocateDirect(TILE_SIZE * TILE_SIZE * 4);
         Bitmap bitmap = Bitmap.createBitmap(TILE_SIZE, TILE_SIZE, Bitmap.Config.ARGB_8888);
 
+        if (mDocument != null) {
             mDocument.paintTile(buffer, TILE_SIZE, TILE_SIZE, (int) pixelToTwip(x, mDPI), (int) pixelToTwip(y, mDPI), (int) mTileWidth, (int) mTileHeight);
+        } else {
+            Log.e(LOGTAG, "Document is null!!");
+        }
 
         bitmap.copyPixelsFromBuffer(buffer);
 
@@ -146,6 +152,12 @@ public class LOKitTileProvider implements TileProvider {
         return bitmap;
     }
 
+    @Override
+    public void close() {
+        Log.i(LOGTAG, "Document destroyed: " + mInputFile);
+        mDocument.destroy();
+    }
+
     @Override
     public void changePart(int partIndex) {
         mDocument.setPart(partIndex);

android/experimental/LOAndroid3/src/java/org/libreoffice/LibreOfficeMainActivity.java

@@ -116,22 +116,19 @@ public class LibreOfficeMainActivity extends Activity {
             mDrawerList.setOnItemClickListener(new DocumentPartClickListener());
         }
 
-        if (mLayerController == null) {
         mLayerController = new LayerController(this);
-
-            Log.e(LOGTAG, "### Creating GeckoSoftwareLayerClient");
         mLayerClient = new GeckoLayerClient(this);
-            Log.e(LOGTAG, "### Done creating GeckoSoftwareLayerClient");
-
         mLayerController.setLayerClient(mLayerClient);
         mGeckoLayout.addView(mLayerController.getView(), 0);
-        }
 
         if (sLOKitThread == null) {
-            sLOKitThread = new LOKitThread(inputFile);
+            sLOKitThread = new LOKitThread();
             sLOKitThread.start();
         }
 
+        sLOKitThread.mEventQueue.clear();
+        LOKitShell.sendEvent(LOEvent.load(inputFile));
+
         Log.w(LOGTAG, "UI almost up");
     }
 

android/experimental/LOAndroid3/src/java/org/libreoffice/MockTileProvider.java

@@ -66,6 +66,10 @@ public class MockTileProvider implements TileProvider {
         return layerController.getDrawable("dummy_page");
     }
 
+    @Override
+    public void close() {
+    }
+
     @Override
     public void changePart(int partIndex) {
 

android/experimental/LOAndroid3/src/java/org/libreoffice/TileProvider.java

@@ -17,4 +17,6 @@ public interface TileProvider {
     void changePart(int partIndex);
 
     Bitmap thumbnail();
+
+    void close();
 }