implement DrawableContainer and copy StateListDrawable from AOSP

meson.build

@@ -81,6 +81,7 @@ libtranslationlayer_so = shared_library('translation_layer_main', [
                                                                   	'src/api-impl-jni/database/android_database_SQLiteConnection.c',
                                                                   	'src/api-impl-jni/graphics/android_graphics_BitmapFactory.c',
                                                                   	'src/api-impl-jni/graphics/android_graphics_drawable_Drawable.c',
+                                                                  	'src/api-impl-jni/graphics/android_graphics_drawable_DrawableContainer.c',
                                                                   	'src/api-impl-jni/graphics/android_graphics_Typeface.c',
                                                                   	'src/api-impl-jni/media/android_media_MediaCodec.c',
                                                                   	'src/api-impl-jni/android_content_res_AssetManager.c',

src/api-impl-jni/generated_headers/android_graphics_drawable_DrawableContainer.h

@@ -0,0 +1,29 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class android_graphics_drawable_DrawableContainer */
+
+#ifndef _Included_android_graphics_drawable_DrawableContainer
+#define _Included_android_graphics_drawable_DrawableContainer
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     android_graphics_drawable_DrawableContainer
+ * Method:    native_constructor
+ * Signature: ()J
+ */
+JNIEXPORT jlong JNICALL Java_android_graphics_drawable_DrawableContainer_native_1constructor
+  (JNIEnv *, jobject);
+
+/*
+ * Class:     android_graphics_drawable_DrawableContainer
+ * Method:    native_selectChild
+ * Signature: (JJ)V
+ */
+JNIEXPORT void JNICALL Java_android_graphics_drawable_DrawableContainer_native_1selectChild
+  (JNIEnv *, jobject, jlong, jlong);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

src/api-impl-jni/graphics/android_graphics_drawable_DrawableContainer.c

@@ -0,0 +1,43 @@
+#include <gdk/gdk.h>
+
+#include "../defines.h"
+#include "../generated_headers/android_graphics_drawable_DrawableContainer.h"
+
+struct _ContainerPaintable {
+	GObject parent_instance;
+	GdkPaintable *child;
+};
+G_DECLARE_FINAL_TYPE(ContainerPaintable, container_paintable, CONTAINER, PAINTABLE, GObject)
+
+static void container_paintable_snapshot(GdkPaintable *paintable, GdkSnapshot *snapshot, double width, double height) {
+	ContainerPaintable *container = CONTAINER_PAINTABLE(paintable);
+	if (container->child)
+		gdk_paintable_snapshot(container->child, snapshot, width, height);
+}
+
+static void container_paintable_init(ContainerPaintable *container_paintable)
+{
+}
+
+static void container_paintable_paintable_init(GdkPaintableInterface *iface)
+{
+	iface->snapshot = container_paintable_snapshot;
+}
+
+static void container_paintable_class_init(ContainerPaintableClass *class) {
+}
+
+G_DEFINE_TYPE_WITH_CODE(ContainerPaintable, container_paintable, G_TYPE_OBJECT,
+		G_IMPLEMENT_INTERFACE(GDK_TYPE_PAINTABLE, container_paintable_paintable_init))
+
+JNIEXPORT jlong JNICALL Java_android_graphics_drawable_DrawableContainer_native_1constructor(JNIEnv *env, jobject this)
+{
+	return _INTPTR(g_object_new(container_paintable_get_type(), NULL));
+}
+
+JNIEXPORT void JNICALL Java_android_graphics_drawable_DrawableContainer_native_1selectChild(JNIEnv *env, jobject this, jlong ptr, jlong child_ptr)
+{
+	ContainerPaintable *container = CONTAINER_PAINTABLE(_PTR(ptr));
+	container->child = GDK_PAINTABLE(_PTR(child_ptr));
+	gdk_paintable_invalidate_contents(GDK_PAINTABLE(container));
+}

src/api-impl/android/content/res/Resources.java

@@ -41,6 +41,7 @@ import com.reandroid.arsc.value.ValueItem;
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.ref.WeakReference;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
@@ -1490,12 +1491,12 @@ public class Resources {
 		// To support generic XML files we will need to manually parse
 		// out the attributes from the XML file (applying type information
 		// contained in the resources and such).
-		XmlBlock.Parser parser = (XmlBlock.Parser)set;
-		mAssets.retrieveAttributes(parser.mParseState, attrs,
-					   array.mData, array.mIndices);
+		ResXmlPullParser parser = (ResXmlPullParser)set;
+		mAssets.applyStyle(Collections.EMPTY_MAP, 0, 0,
+				set, attrs, array.mData, array.mIndices);
 
 		array.mRsrcs = attrs;
-		// array.mXml = parser;
+		array.mXml = parser;
 
 		return array;
 	}

src/api-impl/android/graphics/drawable/Drawable.java

@@ -5,6 +5,7 @@ import java.io.InputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Arrays;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
@@ -59,7 +60,10 @@ public class Drawable {
 	public void draw(Canvas canvas) {}
 
 	public boolean setState(int[] stateSet) {
+		if (!Arrays.equals(this.mStateSet, stateSet)) {
 			this.mStateSet = stateSet;
+			return onStateChange(stateSet);
+		}
 		return false;
 	}
 
@@ -138,5 +142,9 @@ public class Drawable {
 		return new Drawable(paintable);
 	}
 
+	protected boolean onStateChange(int[] stateSet) {
+		return false;
+	}
+
 	protected static native long native_paintable_from_path(String path);
 }

src/api-impl/android/graphics/drawable/DrawableContainer.java

@@ -1,13 +1,61 @@
 package android.graphics.drawable;
 
-import android.graphics.Canvas;
+import android.content.res.Resources;
 
 public class DrawableContainer extends Drawable {
 
-	@Override
-	public void draw(Canvas canvas) {
-		// TODO Auto-generated method stub
-		throw new UnsupportedOperationException("Unimplemented method 'draw'");
+	private DrawableContainerState state;
+	private int curIndex = -1;
+
+	protected native long native_constructor();
+	protected native void native_selectChild(long container, long child);
+
+	public DrawableContainer() {
+		paintable = native_constructor();
+	}
+
+	public boolean selectDrawable(int idx) {
+		if (idx >= 0 && idx < state.childCount && idx != curIndex && state.drawables[idx] != null) {
+			curIndex = idx;
+			native_selectChild(paintable, state.drawables[idx].paintable);
+			return true;
+		}
+		return false;
+	}
+
+	protected void setConstantState(DrawableContainerState state) {
+		this.state = state;
+	}
+
+	public static class DrawableContainerState {
+
+		private Drawable drawables[] = new Drawable[10];
+		private int childCount = 0;
+
+		public DrawableContainerState(DrawableContainerState orig, DrawableContainer owner, Resources res) {
+		}
+		
+		public int getCapacity() {
+			return drawables.length;
+		}
+
+		public int getChildCount() {
+			return childCount;
+		}
+
+		public int addChild(Drawable dr) {
+			if (childCount >= drawables.length) {
+				growArray(drawables.length, drawables.length * 2);
+			}
+			drawables[childCount] = dr;
+			return childCount++;
+		}
+
+		public void growArray(int oldSize, int newSize) {
+				Drawable[] newDrawables = new Drawable[newSize];
+				System.arraycopy(drawables, 0, newDrawables, 0, oldSize);
+				drawables = newDrawables;
+		}
 	}
 	
 }

src/api-impl/android/graphics/drawable/StateListDrawable.java

@@ -1,35 +1,308 @@
+/*
+ * Copyright (C) 2006 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.drawable;
 
-import java.io.IOException;
+import android.content.res.Resources;
+import android.content.res.Resources.Theme;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.util.StateSet;
+
+import com.android.internal.R;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
-import android.content.res.Resources;
-import android.content.res.Resources.Theme;
-import android.graphics.Canvas;
-import android.util.AttributeSet;
-import android.util.Slog;
+import java.io.IOException;
+import java.util.Arrays;
 
-public class StateListDrawable extends Drawable {
+/**
+ * Lets you assign a number of graphic images to a single Drawable and swap out the visible item by a string
+ * ID value.
+ * <p/>
+ * <p>It can be defined in an XML file with the <code>&lt;selector></code> element.
+ * Each state Drawable is defined in a nested <code>&lt;item></code> element. For more
+ * information, see the guide to <a
+ * href="{@docRoot}guide/topics/resources/drawable-resource.html">Drawable Resources</a>.</p>
+ *
+ * @attr ref android.R.styleable#StateListDrawable_visible
+ * @attr ref android.R.styleable#StateListDrawable_variablePadding
+ * @attr ref android.R.styleable#StateListDrawable_constantSize
+ * @attr ref android.R.styleable#DrawableStates_state_focused
+ * @attr ref android.R.styleable#DrawableStates_state_window_focused
+ * @attr ref android.R.styleable#DrawableStates_state_enabled
+ * @attr ref android.R.styleable#DrawableStates_state_checkable
+ * @attr ref android.R.styleable#DrawableStates_state_checked
+ * @attr ref android.R.styleable#DrawableStates_state_selected
+ * @attr ref android.R.styleable#DrawableStates_state_activated
+ * @attr ref android.R.styleable#DrawableStates_state_active
+ * @attr ref android.R.styleable#DrawableStates_state_single
+ * @attr ref android.R.styleable#DrawableStates_state_first
+ * @attr ref android.R.styleable#DrawableStates_state_middle
+ * @attr ref android.R.styleable#DrawableStates_state_last
+ * @attr ref android.R.styleable#DrawableStates_state_pressed
+ */
+public class StateListDrawable extends DrawableContainer {
+	private static final String TAG = "StateListDrawable";
+
+	private static final boolean DEBUG = false;
+
+	private StateListState mStateListState;
+	private boolean mMutated;
+
+	public StateListDrawable() {
+		this(null, null);
+	}
+
+	/**
+	 * Add a new image/string ID to the set of images.
+	 *
+	 * @param stateSet An array of resource Ids to associate with the image.
+	 *                 Switch to this image by calling setState().
+	 * @param drawable The image to show. Note this must be a unique Drawable that is not shared
+	 *                 between any other View or Drawable otherwise the results are
+	 *                 undefined and can lead to unexpected rendering behavior
+	 */
+	public void addState(int[] stateSet, Drawable drawable) {
+		if (drawable != null) {
+			mStateListState.addStateSet(stateSet, drawable);
+			// in case the new state matches our current state...
+			onStateChange(getState());
+		}
+	}
+
+	@Override
+	public boolean isStateful() {
+		return true;
+	}
 
 	@Override
-	public void draw(Canvas canvas) {
-		// TODO Auto-generated method stub
-		throw new UnsupportedOperationException("Unimplemented method 'draw'");
+	protected boolean onStateChange(int[] stateSet) {
+		final boolean changed = super.onStateChange(stateSet);
+
+		int idx = mStateListState.indexOfStateSet(stateSet);
+		if (DEBUG) android.util.Log.i(TAG, "onStateChange " + this + " states "
+				+ Arrays.toString(stateSet) + " found " + idx);
+		if (idx < 0) {
+			idx = mStateListState.indexOfStateSet(StateSet.WILD_CARD);
 		}
 
-	public void addState(int[] stateSet, Drawable drawable) {}
-
-    public void inflate(Resources resources, XmlPullParser parser, AttributeSet attrs, Theme theme) throws XmlPullParserException, IOException {
-		while (parser.next() != XmlPullParser.END_DOCUMENT) {
-			if ("item".equals(parser.getName())) {
-				int resid = attrs.getAttributeResourceValue("http://schemas.android.com/apk/res/android", "drawable", -1);
-				Drawable drawable = resources.getDrawable(resid, theme);
-				this.paintable = drawable.paintable;
-				Slog.i("StateListDrawable", "item resid = " + resid + ", paintable = " + drawable.paintable);
+		return selectDrawable(idx) || changed;
 	}
+
+	public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme)
+			throws XmlPullParserException, IOException {
+		final TypedArray a = r.obtainAttributes(attrs, R.styleable.StateListDrawable);
+		a.recycle();
+
+		inflateChildElements(r, parser, attrs, theme);
+
+		onStateChange(getState());
+	}
+
+	/**
+	 * Inflates child elements from XML.
+	 */
+	private void inflateChildElements(Resources r, XmlPullParser parser, AttributeSet attrs,
+			Theme theme) throws XmlPullParserException, IOException {
+		final StateListState state = mStateListState;
+		final int innerDepth = parser.getDepth() + 1;
+		int type;
+		int depth;
+		while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
+				&& ((depth = parser.getDepth()) >= innerDepth
+				|| type != XmlPullParser.END_TAG)) {
+			if (type != XmlPullParser.START_TAG) {
+				continue;
+			}
+
+			if (depth > innerDepth || !parser.getName().equals("item")) {
+				continue;
+			}
+
+			// This allows state list drawable item elements to be themed at
+			// inflation time but does NOT make them work for Zygote preload.
+			final TypedArray a = r.obtainAttributes(attrs,
+					R.styleable.StateListDrawableItem);
+			Drawable dr = a.getDrawable(R.styleable.StateListDrawableItem_drawable);
+			a.recycle();
+
+			final int[] states = extractStateSet(attrs);
+
+			// Loading child elements modifies the state of the AttributeSet's
+			// underlying parser, so it needs to happen after obtaining
+			// attributes and extracting states.
+			if (dr == null) {
+				while ((type = parser.next()) == XmlPullParser.TEXT) {
+				}
+				if (type != XmlPullParser.START_TAG) {
+					throw new XmlPullParserException(
+							parser.getPositionDescription()
+									+ ": <item> tag requires a 'drawable' attribute or "
+									+ "child tag defining a drawable");
+				}
+				// dr = Drawable.createFromXmlInner(r, parser, attrs, theme);
+			}
+
+			state.addStateSet(states, dr);
 		}
 	}
 
+	/**
+	 * Extracts state_ attributes from an attribute set.
+	 *
+	 * @param attrs The attribute set.
+	 * @return An array of state_ attributes.
+	 */
+	int[] extractStateSet(AttributeSet attrs) {
+		int j = 0;
+		final int numAttrs = attrs.getAttributeCount();
+		int[] states = new int[numAttrs];
+		for (int i = 0; i < numAttrs; i++) {
+			final int stateResId = attrs.getAttributeNameResource(i);
+			switch (stateResId) {
+				case 0:
+					break;
+				case R.attr.drawable:
+				case R.attr.id:
+					// Ignore attributes from StateListDrawableItem and
+					// AnimatedStateListDrawableItem.
+					continue;
+				default:
+					states[j++] = attrs.getAttributeBooleanValue(i, false)
+							? stateResId : -stateResId;
+			}
+		}
+		states = StateSet.trimStateSet(states, j);
+		return states;
+	}
+
+	StateListState getStateListState() {
+		return mStateListState;
+	}
+
+	/**
+	 * Gets the state set at an index.
+	 *
+	 * @param index The index of the state set.
+	 * @return The state set at the index.
+	 * @see #getStateCount()
+	 * @see #getStateDrawable(int)
+	 */
+	public int[] getStateSet(int index) {
+		return mStateListState.mStateSets[index];
+	}
+
+	/**
+	 * Gets the index of the drawable with the provided state set.
+	 *
+	 * @param stateSet the state set to look up
+	 * @return the index of the provided state set, or -1 if not found
+	 * @see #getStateDrawable(int)
+	 * @see #getStateSet(int)
+	 */
+	public int findStateDrawableIndex(int[] stateSet) {
+		return mStateListState.indexOfStateSet(stateSet);
+	}
+
+	@Override
+	public Drawable mutate() {
+		if (!mMutated && super.mutate() == this) {
+			mStateListState.mutate();
+			mMutated = true;
+		}
+		return this;
+	}
+
+	static class StateListState extends DrawableContainerState {
+		int[] mThemeAttrs;
+		int[][] mStateSets;
+
+		StateListState(StateListState orig, StateListDrawable owner, Resources res) {
+			super(orig, owner, res);
+
+			if (orig != null) {
+				// Perform a shallow copy and rely on mutate() to deep-copy.
+				mThemeAttrs = orig.mThemeAttrs;
+				mStateSets = orig.mStateSets;
+			} else {
+				mThemeAttrs = null;
+				mStateSets = new int[getCapacity()][];
+			}
+		}
+
+		void mutate() {
+			mThemeAttrs = mThemeAttrs != null ? mThemeAttrs.clone() : null;
+
+			final int[][] stateSets = new int[mStateSets.length][];
+			for (int i = mStateSets.length - 1; i >= 0; i--) {
+				stateSets[i] = mStateSets[i] != null ? mStateSets[i].clone() : null;
+			}
+			mStateSets = stateSets;
+		}
+
+		int addStateSet(int[] stateSet, Drawable drawable) {
+			final int pos = addChild(drawable);
+			mStateSets[pos] = stateSet;
+			return pos;
+		}
+
+		int indexOfStateSet(int[] stateSet) {
+			final int[][] stateSets = mStateSets;
+			final int N = getChildCount();
+			for (int i = 0; i < N; i++) {
+				if (StateSet.stateSetMatches(stateSets[i], stateSet)) {
+					return i;
+				}
+			}
+			return -1;
+		}
+
+		@Override
+		public void growArray(int oldSize, int newSize) {
+			super.growArray(oldSize, newSize);
+			final int[][] newStateSets = new int[newSize][];
+			System.arraycopy(mStateSets, 0, newStateSets, 0, oldSize);
+			mStateSets = newStateSets;
+		}
+	}
+
+	protected void setConstantState(DrawableContainerState state) {
+		super.setConstantState(state);
+
+		if (state instanceof StateListState) {
+			mStateListState = (StateListState) state;
+		}
+	}
+
+	private StateListDrawable(StateListState state, Resources res) {
+		// Every state list drawable has its own constant state.
+		final StateListState newState = new StateListState(state, this, res);
+		setConstantState(newState);
+		onStateChange(getState());
+	}
+
+	/**
+	 * This constructor exists so subclasses can avoid calling the default
+	 * constructor and setting up a StateListDrawable-specific constant state.
+	 */
+	StateListDrawable(StateListState state) {
+		if (state != null) {
+			setConstantState(state);
+		}
+	}
 }

src/api-impl/android/view/View.java

@@ -1,5 +1,6 @@
 package android.view;
 
+import android.R;
 import android.animation.StateListAnimator;
 import android.content.Context;
 import android.content.res.ColorStateList;
@@ -818,6 +819,8 @@ public class View extends Object {
 
 	private int visibility = View.VISIBLE;
 	private float alpha = 1.0f;
+	private boolean pressed = false;
+	private Drawable background;
 
 	public View(Context context, AttributeSet attrs) {
 		this(context, attrs, 0);
@@ -973,6 +976,11 @@ public class View extends Object {
 
 	public void setPressed(boolean pressed) {
 		Slog.w(TAG, "calling setPressed on " + this + " with value: " + pressed);
+		if (this.pressed != pressed) {
+			this.pressed = pressed;
+			if (background != null && background.isStateful())
+				background.setState(getDrawableState());
+		}
 	}
 
 	public void setSelected(boolean selected) {
@@ -1108,10 +1116,7 @@ public class View extends Object {
 	public static class AccessibilityDelegate {}
 
 	public Drawable getBackground() {
-		return new Drawable() {
-			@Override
-			public void draw(Canvas canvas) {}
-		};
+		return background;
 	}
 
 	public void setClickable(boolean clickable) {}
@@ -1245,6 +1250,7 @@ public class View extends Object {
 	}
 
 	public void setBackgroundDrawable(Drawable backgroundDrawable) {
+		this.background = backgroundDrawable;
 		native_setBackgroundDrawable(widget, backgroundDrawable != null ? backgroundDrawable.paintable : 0);
 	}
 
@@ -1321,7 +1327,14 @@ public class View extends Object {
 		}
 	}
 
-	public final int[] getDrawableState() {return new int[0];}
+	public final int[] getDrawableState() {
+		int[] state = new int[2];
+		state[0] = R.attr.state_enabled;
+		if (pressed) {
+			state[1] = R.attr.state_pressed;
+		}
+		return state;
+	}
 
 	public float getRotation() {return 0.f;}
 
@@ -1452,7 +1465,9 @@ public class View extends Object {
 
 	public int getLayoutDirection() {return LAYOUT_DIRECTION_LTR;}
 
-	public void setBackground(Drawable background) {}
+	public void setBackground(Drawable background) {
+		setBackgroundDrawable(background);
+	}
 
 	private float elevation;
 	public void setElevation(float elevation) {

src/api-impl/com/android/internal/R.java

@@ -43662,6 +43662,33 @@ public final class R {
 		  @attr name android:visible
 		*/
 		public static final int StateListDrawable_visible = 1;
+		/**  Represents a single state inside a StateListDrawable. 
+			 <p>Includes the following attributes:</p>
+			<table>
+			<colgroup align="left" />
+			<colgroup align="left" />
+			<tr><th>Attribute</th><th>Description</th></tr>
+			<tr><td><code>{@link #StateListDrawableItem_drawable android:drawable}</code></td><td> Reference to a drawable resource to use for the state.</td></tr>
+			</table>
+			@see #StateListDrawableItem_drawable
+			*/
+		public static final int[] StateListDrawableItem = {
+			0x01010199
+		};
+		/**
+			 <p>
+			@attr description
+			Reference to a drawable resource to use for the state. If not
+				given, the drawable must be defined by the first child tag. 
+
+
+			<p>Must be a reference to another resource, in the form "<code>@[+][<i>package</i>:]<i>type</i>:<i>name</i></code>"
+			or to a theme attribute in the form "<code>?[<i>package</i>:][<i>type</i>:]<i>name</i></code>".
+			<p>This corresponds to the global attribute
+			resource symbol {@link android.R.attr#drawable}.
+			@attr name android:drawable
+		*/
+		public static final int StateListDrawableItem_drawable = 0;
 		/**
 		   Attributes that can be used with a Storage.
 		   <p>Includes the following attributes:</p>