Support AppBar from Material Design. (4dfe4d43) · Commits · e / os / android_frameworks_base

tools/layoutlib/bridge/src/android/view/BridgeInflater.java

+8 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@ import com.android.ide.common.rendering.api.MergeCookie;
		import com.android.ide.common.rendering.api.ResourceReference;
		import com.android.ide.common.rendering.api.ResourceValue;
		import com.android.layoutlib.bridge.Bridge;
		import com.android.layoutlib.bridge.BridgeConstants;
		import com.android.layoutlib.bridge.android.BridgeContext;
		import com.android.layoutlib.bridge.android.BridgeXmlBlockParser;
		import com.android.layoutlib.bridge.impl.ParserFactory;
		@@ -234,6 +235,13 @@ public final class BridgeInflater extends LayoutInflater {
		if (viewKey != null) {
		bc.addViewKey(view, viewKey);
		}
		String scrollPos = attrs.getAttributeValue(BridgeConstants.NS_RESOURCES, "scrollY");
		if (scrollPos != null) {
		if (scrollPos.endsWith("px")) {
		int value = Integer.parseInt(scrollPos.substring(0, scrollPos.length() - 2));
		bc.setScrollYPos(view, value);
		}
		}
		}
		}

tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgeContext.java

+11 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,7 @@ import org.xmlpull.v1.XmlPullParser;
		import org.xmlpull.v1.XmlPullParserException;

		import android.annotation.Nullable;
		import android.annotation.NonNull;
		import android.content.BroadcastReceiver;
		import android.content.ComponentName;
		import android.content.ContentResolver;
		@@ -125,6 +126,7 @@ public final class BridgeContext extends Context {
		private final LayoutlibCallback mLayoutlibCallback;
		private final WindowManager mWindowManager;
		private final DisplayManager mDisplayManager;
		private final HashMap<View, Integer> mScrollYPos = new HashMap<View, Integer>();

		private Resources.Theme mTheme;

		@@ -1738,4 +1740,13 @@ public final class BridgeContext extends Context {
		// pass
		return new File[0];
		}

		public void setScrollYPos(@NonNull View view, int scrollPos) {
		mScrollYPos.put(view, scrollPos);
		}

		public int getScrollYPos(@NonNull View view) {
		Integer pos = mScrollYPos.get(view);
		return pos != null ? pos : 0;
		}
		}

tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/support/DesignLibUtil.java

0 → 100644

+65 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2015 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 com.android.layoutlib.bridge.android.support;

		import com.android.ide.common.rendering.api.LayoutLog;
		import com.android.layoutlib.bridge.Bridge;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.view.View;

		import java.lang.reflect.Method;

		import static com.android.layoutlib.bridge.util.ReflectionUtils.ReflectionException;
		import static com.android.layoutlib.bridge.util.ReflectionUtils.getMethod;
		import static com.android.layoutlib.bridge.util.ReflectionUtils.invoke;

		/**
		* Utility class for working with the design support lib.
		*/
		public class DesignLibUtil {

		private static final String PKG_PREFIX = "android.support.design.widget.";
		public static final String CN_COORDINATOR_LAYOUT = PKG_PREFIX + "CoordinatorLayout";
		public static final String CN_APPBAR_LAYOUT = PKG_PREFIX + "AppBarLayout";
		public static final String CN_COLLAPSING_TOOLBAR_LAYOUT =
		PKG_PREFIX + "CollapsingToolbarLayout";
		public static final String CN_TOOLBAR = "android.support.v7.widget.Toolbar";
		public static final int SCROLL_AXIS_VERTICAL = 1 << 1;

		/**
		* Tries to set the title of a view. This is used to set the title in a
		* CollapsingToolbarLayout.
		* <p/>
		* Any exceptions thrown during the process are logged in {@link Bridge#getLog()}
		*/
		public static void setTitle(@NonNull View view, @Nullable String title) {
		if (title == null) {
		return;
		}
		try {
		Method setTitle = getMethod(view.getClass(), "setTitle", CharSequence.class);
		if (setTitle != null) {
		invoke(setTitle, view, title);
		}
		} catch (ReflectionException e) {
		Bridge.getLog().warning(LayoutLog.TAG_INFO,
		"Error occurred while trying to set title.", e);
		}
		}
		}

tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/RenderSessionImpl.java

+98 −1

Original line number	Diff line number	Diff line
		@@ -44,6 +44,7 @@ import com.android.layoutlib.bridge.android.BridgeContext;
		import com.android.layoutlib.bridge.android.BridgeLayoutParamsMapAttributes;
		import com.android.layoutlib.bridge.android.BridgeXmlBlockParser;
		import com.android.layoutlib.bridge.android.RenderParamsFlags;
		import com.android.layoutlib.bridge.android.support.DesignLibUtil;
		import com.android.layoutlib.bridge.android.support.RecyclerViewUtil;
		import com.android.layoutlib.bridge.bars.AppCompatActionBar;
		import com.android.layoutlib.bridge.bars.BridgeActionBar;
		@@ -148,7 +149,6 @@ public class RenderSessionImpl extends RenderAction<SessionParams> {
		private int mTitleBarSize;
		private int mActionBarSize;


		// information being returned through the API
		private BufferedImage mImage;
		private List<ViewInfo> mViewInfoList;
		@@ -424,6 +424,8 @@ public class RenderSessionImpl extends RenderAction<SessionParams> {
		// post-inflate process. For now this supports TabHost/TabWidget
		postInflateProcess(view, params.getLayoutlibCallback(), isPreference ? view : null);

		setActiveToolbar(view, context, params);

		// get the background drawable
		if (mWindowBackground != null) {
		Drawable d = ResourceHelper.getDrawable(mWindowBackground, context);
		@@ -544,6 +546,8 @@ public class RenderSessionImpl extends RenderAction<SessionParams> {
		// now do the layout.
		mViewRoot.layout(0, 0, mMeasuredScreenWidth, mMeasuredScreenHeight);

		handleScrolling(mViewRoot);

		if (params.isLayoutOnly()) {
		// delete the canvas and image to reset them on the next full rendering
		mImage = null;
		@@ -1349,6 +1353,99 @@ public class RenderSessionImpl extends RenderAction<SessionParams> {
		}
		}

		/**
		* If the root layout is a CoordinatorLayout with an AppBar:
		* Set the title of the AppBar to the title of the activity context.
		*/
		private void setActiveToolbar(View view, BridgeContext context, SessionParams params) {
		View coordinatorLayout = findChildView(view, DesignLibUtil.CN_COORDINATOR_LAYOUT);
		if (coordinatorLayout == null) {
		return;
		}
		View appBar = findChildView(coordinatorLayout, DesignLibUtil.CN_APPBAR_LAYOUT);
		if (appBar == null) {
		return;
		}
		ViewGroup collapsingToolbar =
		(ViewGroup) findChildView(appBar, DesignLibUtil.CN_COLLAPSING_TOOLBAR_LAYOUT);
		if (collapsingToolbar == null) {
		return;
		}
		if (!hasToolbar(collapsingToolbar)) {
		return;
		}
		RenderResources res = context.getRenderResources();
		String title = params.getAppLabel();
		ResourceValue titleValue = res.findResValue(title, false);
		if (titleValue != null && titleValue.getValue() != null) {
		title = titleValue.getValue();
		}
		DesignLibUtil.setTitle(collapsingToolbar, title);
		}

		private View findChildView(View view, String className) {
		if (!(view instanceof ViewGroup)) {
		return null;
		}
		ViewGroup group = (ViewGroup) view;
		for (int i = 0; i < group.getChildCount(); i++) {
		if (isInstanceOf(group.getChildAt(i), className)) {
		return group.getChildAt(i);
		}
		}
		return null;
		}

		private boolean hasToolbar(View collapsingToolbar) {
		if (!(collapsingToolbar instanceof ViewGroup)) {
		return false;
		}
		ViewGroup group = (ViewGroup) collapsingToolbar;
		for (int i = 0; i < group.getChildCount(); i++) {
		if (isInstanceOf(group.getChildAt(i), DesignLibUtil.CN_TOOLBAR)) {
		return true;
		}
		}
		return false;
		}

		/**
		* Set the vertical scroll position on all the components with the "scrollY" attribute. If the
		* component supports nested scrolling attempt that first, then use the unconsumed scroll part
		* to scroll the content in the component.
		*/
		private void handleScrolling(View view) {
		BridgeContext context = getContext();
		int scrollPos = context.getScrollYPos(view);
		if (scrollPos != 0) {
		if (view.isNestedScrollingEnabled()) {
		int[] consumed = new int[2];
		if (view.startNestedScroll(DesignLibUtil.SCROLL_AXIS_VERTICAL)) {
		view.dispatchNestedPreScroll(0, scrollPos, consumed, null);
		view.dispatchNestedScroll(consumed[0], consumed[1], 0, scrollPos, null);
		view.stopNestedScroll();
		scrollPos -= consumed[1];
		}
		}
		if (scrollPos != 0) {
		view.scrollBy(0, scrollPos);
		} else {
		view.scrollBy(0, scrollPos);
		}
		} else {
		view.scrollBy(0, scrollPos);
		}

		if (!(view instanceof ViewGroup)) {
		return;
		}
		ViewGroup group = (ViewGroup) view;
		for (int i = 0; i < group.getChildCount(); i++) {
		View child = group.getChildAt(i);
		handleScrolling(child);
		}
		}

		/**
		* Check if the object is an instance of a class named {@code className}. This doesn't work
		* for interfaces.