1 files changed, 225 insertions, 0 deletions
diff --git a/tools/layoutlib/bridge/src/android/graphics/NinePatch_Delegate.java b/tools/layoutlib/bridge/src/android/graphics/NinePatch_Delegate.java
new file mode 100644
index 0000000..5e882ce
--- /dev/null
+++ b/tools/layoutlib/bridge/src/android/graphics/NinePatch_Delegate.java
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.graphics;
+
+import com.android.ide.common.rendering.api.LayoutLog;
+import com.android.layoutlib.bridge.Bridge;
+import com.android.layoutlib.bridge.impl.DelegateManager;
+import com.android.layoutlib.bridge.impl.GcSnapshot;
+import com.android.ninepatch.NinePatchChunk;
+import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
+
+import android.graphics.drawable.NinePatchDrawable;
+
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.lang.ref.SoftReference;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Delegate implementing the native methods of android.graphics.NinePatch
+ *
+ * Through the layoutlib_create tool, the original native methods of NinePatch have been replaced
+ * by calls to methods of the same name in this delegate class.
+ *
+ * Because it's a stateless class to start with, there's no need to keep a {@link DelegateManager}
+ * around to map int to instance of the delegate.
+ *
+ */
+public final class NinePatch_Delegate {
+
+    /**
+     * Cache map for {@link NinePatchChunk}.
+     * When the chunks are created they are serialized into a byte[], and both are put
+     * in the cache, using a {@link SoftReference} for the chunk. The default Java classes
+     * for {@link NinePatch} and {@link NinePatchDrawable} only reference to the byte[] data, and
+     * provide this for drawing.
+     * Using the cache map allows us to not have to deserialize the byte[] back into a
+     * {@link NinePatchChunk} every time a rendering is done.
+     */
+    private final static Map<byte[], SoftReference<NinePatchChunk>> sChunkCache =
+        new HashMap<byte[], SoftReference<NinePatchChunk>>();
+
+    // ---- Public Helper methods ----
+
+    /**
+     * Serializes the given chunk.
+     *
+     * @return the serialized data for the chunk.
+     */
+    public static byte[] serialize(NinePatchChunk chunk) {
+        // serialize the chunk to get a byte[]
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ObjectOutputStream oos = null;
+        try {
+            oos = new ObjectOutputStream(baos);
+            oos.writeObject(chunk);
+        } catch (IOException e) {
+            Bridge.getLog().error(null, "Failed to serialize NinePatchChunk.", e, null /*data*/);
+            return null;
+        } finally {
+            if (oos != null) {
+                try {
+                    oos.close();
+                } catch (IOException e) {
+                }
+            }
+        }
+
+        // get the array and add it to the cache
+        byte[] array = baos.toByteArray();
+        sChunkCache.put(array, new SoftReference<NinePatchChunk>(chunk));
+        return array;
+    }
+
+    /**
+     * Returns a {@link NinePatchChunk} object for the given serialized representation.
+     *
+     * If the chunk is present in the cache then the object from the cache is returned, otherwise
+     * the array is deserialized into a {@link NinePatchChunk} object.
+     *
+     * @param array the serialized representation of the chunk.
+     * @return the NinePatchChunk or null if deserialization failed.
+     */
+    public static NinePatchChunk getChunk(byte[] array) {
+        SoftReference<NinePatchChunk> chunkRef = sChunkCache.get(array);
+        NinePatchChunk chunk = chunkRef.get();
+        if (chunk == null) {
+            ByteArrayInputStream bais = new ByteArrayInputStream(array);
+            ObjectInputStream ois = null;
+            try {
+                ois = new ObjectInputStream(bais);
+                chunk = (NinePatchChunk) ois.readObject();
+
+                // put back the chunk in the cache
+                if (chunk != null) {
+                    sChunkCache.put(array, new SoftReference<NinePatchChunk>(chunk));
+                }
+            } catch (IOException e) {
+                Bridge.getLog().error(LayoutLog.TAG_BROKEN,
+                        "Failed to deserialize NinePatchChunk content.", e, null /*data*/);
+                return null;
+            } catch (ClassNotFoundException e) {
+                Bridge.getLog().error(LayoutLog.TAG_BROKEN,
+                        "Failed to deserialize NinePatchChunk class.", e, null /*data*/);
+                return null;
+            } finally {
+                if (ois != null) {
+                    try {
+                        ois.close();
+                    } catch (IOException e) {
+                    }
+                }
+            }
+        }
+
+        return chunk;
+    }
+
+    // ---- native methods ----
+
+    @LayoutlibDelegate
+    /*package*/ static boolean isNinePatchChunk(byte[] chunk) {
+        NinePatchChunk chunkObject = getChunk(chunk);
+        if (chunkObject != null) {
+            return true;
+        }
+
+        return false;
+    }
+
+    @LayoutlibDelegate
+    /*package*/ static void validateNinePatchChunk(int bitmap, byte[] chunk) {
+        // the default JNI implementation only checks that the byte[] has the same
+        // size as the C struct it represent. Since we cannot do the same check (serialization
+        // will return different size depending on content), we do nothing.
+    }
+
+    @LayoutlibDelegate
+    /*package*/ static void nativeDraw(int canvas_instance, RectF loc, int bitmap_instance,
+            byte[] c, int paint_instance_or_null, int destDensity, int srcDensity) {
+        draw(canvas_instance,
+                (int) loc.left, (int) loc.top, (int) loc.width(), (int) loc.height(),
+                bitmap_instance, c, paint_instance_or_null,
+                destDensity, srcDensity);
+    }
+
+    @LayoutlibDelegate
+    /*package*/ static void nativeDraw(int canvas_instance, Rect loc, int bitmap_instance,
+            byte[] c, int paint_instance_or_null, int destDensity, int srcDensity) {
+        draw(canvas_instance,
+                loc.left, loc.top, loc.width(), loc.height(),
+                bitmap_instance, c, paint_instance_or_null,
+                destDensity, srcDensity);
+    }
+
+    @LayoutlibDelegate
+    /*package*/ static int nativeGetTransparentRegion(int bitmap, byte[] chunk, Rect location) {
+        return 0;
+    }
+
+    // ---- Private Helper methods ----
+
+    private static void draw(int canvas_instance,
+            final int left, final int top, final int right, final int bottom,
+            int bitmap_instance, byte[] c, int paint_instance_or_null,
+            final int destDensity, final int srcDensity) {
+        // get the delegate from the native int.
+        final Bitmap_Delegate bitmap_delegate = Bitmap_Delegate.getDelegate(bitmap_instance);
+        if (bitmap_delegate == null) {
+            return;
+        }
+
+        if (c == null) {
+            // not a 9-patch?
+            BufferedImage image = bitmap_delegate.getImage();
+            Canvas_Delegate.native_drawBitmap(canvas_instance, bitmap_instance,
+                    new Rect(0, 0, image.getWidth(), image.getHeight()),
+                    new Rect(left, top, right, bottom),
+                    paint_instance_or_null, destDensity, srcDensity);
+            return;
+        }
+
+        final NinePatchChunk chunkObject = getChunk(c);
+        assert chunkObject != null;
+        if (chunkObject == null) {
+            return;
+        }
+
+        Canvas_Delegate canvas_delegate = Canvas_Delegate.getDelegate(canvas_instance);
+        if (canvas_delegate == null) {
+            return;
+        }
+
+        // this one can be null
+        Paint_Delegate paint_delegate = Paint_Delegate.getDelegate(paint_instance_or_null);
+
+        canvas_delegate.getSnapshot().draw(new GcSnapshot.Drawable() {
+                public void draw(Graphics2D graphics, Paint_Delegate paint) {
+                    chunkObject.draw(bitmap_delegate.getImage(), graphics,
+                            left, top, right - left, bottom - top, destDensity, srcDensity);
+                }
+            }, paint_delegate, true /*compositeOnly*/, false /*forceSrcMode*/);
+
+     }
+}