src/com/android/launcher3/graphics/LauncherPreviewRenderer.java - platform/packages/apps/Launcher3 - Git at Google

 /*
  * Copyright (C) 2018 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.launcher3.graphics;

 import static android.view.View.MeasureSpec.EXACTLY;
 import static android.view.View.MeasureSpec.makeMeasureSpec;
 import static android.view.View.VISIBLE;

 import android.annotation.TargetApi;
 import android.app.Fragment;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.TypedArray;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.drawable.AdaptiveIconDrawable;
 import android.graphics.drawable.ColorDrawable;
 import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Process;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.ContextThemeWrapper;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextClock;

 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.CellLayout;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Hotseat;
 import com.android.launcher3.InsettableFrameLayout;
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.R;
 import com.android.launcher3.WorkspaceItemInfo;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.WorkspaceLayoutManager;
 import com.android.launcher3.allapps.SearchUiManager;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.icons.BaseIconFactory;
 import com.android.launcher3.icons.BitmapInfo;
 import com.android.launcher3.icons.BitmapRenderer;
 import com.android.launcher3.views.ActivityContext;
 import com.android.launcher3.views.BaseDragLayer;

 import java.util.concurrent.Callable;
 import java.util.concurrent.CountDownLatch;

 /**
  * Utility class for generating the preview of Launcher for a given InvariantDeviceProfile.
  * Steps:
  *   1) Create a dummy icon info with just white icon
  *   2) Inflate a strip down layout definition for Launcher
  *   3) Place appropriate elements like icons and first-page qsb
  *   4) Measure and draw the view on a canvas
  */
 @TargetApi(Build.VERSION_CODES.O)
 public class LauncherPreviewRenderer implements Callable<Bitmap> {

     private static final String TAG = "LauncherPreviewRenderer";

     private final Handler mUiHandler;
     private final Context mContext;
     private final InvariantDeviceProfile mIdp;
     private final DeviceProfile mDp;
     private final Rect mInsets;

     private final WorkspaceItemInfo mWorkspaceItemInfo;

     public LauncherPreviewRenderer(Context context, InvariantDeviceProfile idp) {
         mUiHandler = new Handler(Looper.getMainLooper());
         mContext = context;
         mIdp = idp;
         mDp = idp.portraitProfile.copy(context);

         // TODO: get correct insets once display cutout API is available.
         mInsets = new Rect();
         mInsets.left = mInsets.right = (mDp.widthPx - mDp.availableWidthPx) / 2;
         mInsets.top = mInsets.bottom = (mDp.heightPx - mDp.availableHeightPx) / 2;
         mDp.updateInsets(mInsets);

         BaseIconFactory iconFactory =
                 new BaseIconFactory(context, mIdp.fillResIconDpi, mIdp.iconBitmapSize) { };
         BitmapInfo iconInfo = iconFactory.createBadgedIconBitmap(new AdaptiveIconDrawable(
                         new ColorDrawable(Color.WHITE), new ColorDrawable(Color.WHITE)),
                 Process.myUserHandle(),
                 Build.VERSION.SDK_INT);

         mWorkspaceItemInfo = new WorkspaceItemInfo();
         mWorkspaceItemInfo.applyFrom(iconInfo);
         mWorkspaceItemInfo.intent = new Intent();
         mWorkspaceItemInfo.contentDescription = mWorkspaceItemInfo.title =
                 context.getString(R.string.label_application);
     }

     @Override
     public Bitmap call() {
         return BitmapRenderer.createHardwareBitmap(mDp.widthPx, mDp.heightPx, c -> {

             if (Looper.myLooper() == Looper.getMainLooper()) {
                 new MainThreadRenderer(mContext).renderScreenShot(c);
             } else {
                 CountDownLatch latch = new CountDownLatch(1);
                 Utilities.postAsyncCallback(mUiHandler, () -> {
                     new MainThreadRenderer(mContext).renderScreenShot(c);
                     latch.countDown();
                 });

                 try {
                     latch.await();
                 } catch (Exception e) {
                     Log.e(TAG, "Error drawing on main thread", e);
                 }
             }
         });
     }

     private class MainThreadRenderer extends ContextThemeWrapper
             implements ActivityContext, WorkspaceLayoutManager, LayoutInflater.Factory2 {

         private final LayoutInflater mHomeElementInflater;
         private final InsettableFrameLayout mRootView;

         private final Hotseat mHotseat;
         private final CellLayout mWorkspace;

         MainThreadRenderer(Context context) {
             super(context, R.style.AppTheme);

             mHomeElementInflater = LayoutInflater.from(
                     new ContextThemeWrapper(this, R.style.HomeScreenElementTheme));
             mHomeElementInflater.setFactory2(this);

             mRootView = (InsettableFrameLayout) mHomeElementInflater.inflate(
                     R.layout.launcher_preview_layout, null, false);
             mRootView.setInsets(mInsets);
             measureView(mRootView, mDp.widthPx, mDp.heightPx);

             mHotseat = mRootView.findViewById(R.id.hotseat);
             mHotseat.resetLayout(false);

             mWorkspace = mRootView.findViewById(R.id.workspace);
             mWorkspace.setPadding(mDp.workspacePadding.left + mDp.cellLayoutPaddingLeftRightPx,
                     mDp.workspacePadding.top,
                     mDp.workspacePadding.right + mDp.cellLayoutPaddingLeftRightPx,
                     mDp.workspacePadding.bottom);
         }

         @Override
         public View onCreateView(View parent, String name, Context context, AttributeSet attrs) {
             if ("TextClock".equals(name)) {
                 // Workaround for TextClock accessing handler for unregistering ticker.
                 return new TextClock(context, attrs) {

                     @Override
                     public Handler getHandler() {
                         return mUiHandler;
                     }
                 };
             } else if (!"fragment".equals(name)) {
                 return null;
             }

             TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.PreviewFragment);
             FragmentWithPreview f = (FragmentWithPreview) Fragment.instantiate(
                     context, ta.getString(R.styleable.PreviewFragment_android_name));
             f.enterPreviewMode(context);
             f.onInit(null);

             View view = f.onCreateView(LayoutInflater.from(context), (ViewGroup) parent, null);
             view.setId(ta.getInt(R.styleable.PreviewFragment_android_id, View.NO_ID));
             return view;
         }

         @Override
         public View onCreateView(String name, Context context, AttributeSet attrs) {
             return onCreateView(null, name, context, attrs);
         }

         @Override
         public BaseDragLayer getDragLayer() {
             throw new UnsupportedOperationException();
         }

         @Override
         public DeviceProfile getDeviceProfile() {
             return mDp;
         }

         @Override
         public Hotseat getHotseat() {
             return mHotseat;
         }

         @Override
         public CellLayout getScreenWithId(int screenId) {
             return mWorkspace;
         }

         private void inflateAndAddIcon(WorkspaceItemInfo info) {
             BubbleTextView icon = (BubbleTextView) mHomeElementInflater.inflate(
                     R.layout.app_icon, mWorkspace, false);
             icon.applyFromWorkspaceItem(info);
             addInScreenFromBind(icon, info);
         }

         private void dispatchVisibilityAggregated(View view, boolean isVisible) {
             // Similar to View.dispatchVisibilityAggregated implementation.
             final boolean thisVisible = view.getVisibility() == VISIBLE;
             if (thisVisible || !isVisible) {
                 view.onVisibilityAggregated(isVisible);
             }

             if (view instanceof ViewGroup) {
                 isVisible = thisVisible && isVisible;
                 ViewGroup vg = (ViewGroup) view;
                 int count = vg.getChildCount();

                 for (int i = 0; i < count; i++) {
                     dispatchVisibilityAggregated(vg.getChildAt(i), isVisible);
                 }
             }
         }

         private void renderScreenShot(Canvas canvas) {
             // Add hotseat icons
             for (int i = 0; i < mIdp.numHotseatIcons; i++) {
                 WorkspaceItemInfo info = new WorkspaceItemInfo(mWorkspaceItemInfo);
                 info.container = Favorites.CONTAINER_HOTSEAT;
                 info.screenId = i;
                 inflateAndAddIcon(info);
             }

             // Add workspace icons
             for (int i = 0; i < mIdp.numColumns; i++) {
                 WorkspaceItemInfo info = new WorkspaceItemInfo(mWorkspaceItemInfo);
                 info.container = Favorites.CONTAINER_DESKTOP;
                 info.screenId = 0;
                 info.cellX = i;
                 info.cellY = mIdp.numRows - 1;
                 inflateAndAddIcon(info);
             }

             // Add first page QSB
             if (FeatureFlags.QSB_ON_FIRST_SCREEN) {
                 View qsb = mHomeElementInflater.inflate(
                         R.layout.search_container_workspace, mWorkspace, false);
                 CellLayout.LayoutParams lp =
                         new CellLayout.LayoutParams(0, 0, mWorkspace.getCountX(), 1);
                 lp.canReorder = false;
                 mWorkspace.addViewToCellLayout(qsb, 0, R.id.search_container_workspace, lp, true);
             }

             // Setup search view
             SearchUiManager searchUiManager =
                     mRootView.findViewById(R.id.search_container_all_apps);
             mRootView.findViewById(R.id.apps_view).setTranslationY(
                     mDp.heightPx - searchUiManager.getScrollRangeDelta(mInsets));

             measureView(mRootView, mDp.widthPx, mDp.heightPx);
             dispatchVisibilityAggregated(mRootView, true);
             measureView(mRootView, mDp.widthPx, mDp.heightPx);
             // Additional measure for views which use auto text size API
             measureView(mRootView, mDp.widthPx, mDp.heightPx);

             mRootView.draw(canvas);
             dispatchVisibilityAggregated(mRootView, false);
         }
     }

     private static void measureView(View view, int width, int height) {
         view.measure(makeMeasureSpec(width, EXACTLY), makeMeasureSpec(height, EXACTLY));
         view.layout(0, 0, width, height);
     }
 }
	/*
	* Copyright (C) 2018 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.launcher3.graphics;

	import static android.view.View.MeasureSpec.EXACTLY;
	import static android.view.View.MeasureSpec.makeMeasureSpec;
	import static android.view.View.VISIBLE;

	import android.annotation.TargetApi;
	import android.app.Fragment;
	import android.content.Context;
	import android.content.Intent;
	import android.content.res.TypedArray;
	import android.graphics.Bitmap;
	import android.graphics.Canvas;
	import android.graphics.Color;
	import android.graphics.Rect;
	import android.graphics.drawable.AdaptiveIconDrawable;
	import android.graphics.drawable.ColorDrawable;
	import android.os.Build;
	import android.os.Handler;
	import android.os.Looper;
	import android.os.Process;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.view.ContextThemeWrapper;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.TextClock;

	import com.android.launcher3.BubbleTextView;
	import com.android.launcher3.CellLayout;
	import com.android.launcher3.DeviceProfile;
	import com.android.launcher3.Hotseat;
	import com.android.launcher3.InsettableFrameLayout;
	import com.android.launcher3.InvariantDeviceProfile;
	import com.android.launcher3.LauncherSettings.Favorites;
	import com.android.launcher3.R;
	import com.android.launcher3.WorkspaceItemInfo;
	import com.android.launcher3.Utilities;
	import com.android.launcher3.WorkspaceLayoutManager;
	import com.android.launcher3.allapps.SearchUiManager;
	import com.android.launcher3.config.FeatureFlags;
	import com.android.launcher3.icons.BaseIconFactory;
	import com.android.launcher3.icons.BitmapInfo;
	import com.android.launcher3.icons.BitmapRenderer;
	import com.android.launcher3.views.ActivityContext;
	import com.android.launcher3.views.BaseDragLayer;

	import java.util.concurrent.Callable;
	import java.util.concurrent.CountDownLatch;

	/**
	* Utility class for generating the preview of Launcher for a given InvariantDeviceProfile.
	* Steps:
	* 1) Create a dummy icon info with just white icon
	* 2) Inflate a strip down layout definition for Launcher
	* 3) Place appropriate elements like icons and first-page qsb
	* 4) Measure and draw the view on a canvas
	*/
	@TargetApi(Build.VERSION_CODES.O)
	public class LauncherPreviewRenderer implements Callable<Bitmap> {

	private static final String TAG = "LauncherPreviewRenderer";

	private final Handler mUiHandler;
	private final Context mContext;
	private final InvariantDeviceProfile mIdp;
	private final DeviceProfile mDp;
	private final Rect mInsets;

	private final WorkspaceItemInfo mWorkspaceItemInfo;

	public LauncherPreviewRenderer(Context context, InvariantDeviceProfile idp) {
	mUiHandler = new Handler(Looper.getMainLooper());
	mContext = context;
	mIdp = idp;
	mDp = idp.portraitProfile.copy(context);

	// TODO: get correct insets once display cutout API is available.
	mInsets = new Rect();
	mInsets.left = mInsets.right = (mDp.widthPx - mDp.availableWidthPx) / 2;
	mInsets.top = mInsets.bottom = (mDp.heightPx - mDp.availableHeightPx) / 2;
	mDp.updateInsets(mInsets);

	BaseIconFactory iconFactory =
	new BaseIconFactory(context, mIdp.fillResIconDpi, mIdp.iconBitmapSize) { };
	BitmapInfo iconInfo = iconFactory.createBadgedIconBitmap(new AdaptiveIconDrawable(
	new ColorDrawable(Color.WHITE), new ColorDrawable(Color.WHITE)),
	Process.myUserHandle(),
	Build.VERSION.SDK_INT);

	mWorkspaceItemInfo = new WorkspaceItemInfo();
	mWorkspaceItemInfo.applyFrom(iconInfo);
	mWorkspaceItemInfo.intent = new Intent();
	mWorkspaceItemInfo.contentDescription = mWorkspaceItemInfo.title =
	context.getString(R.string.label_application);
	}

	@Override
	public Bitmap call() {
	return BitmapRenderer.createHardwareBitmap(mDp.widthPx, mDp.heightPx, c -> {

	if (Looper.myLooper() == Looper.getMainLooper()) {
	new MainThreadRenderer(mContext).renderScreenShot(c);
	} else {
	CountDownLatch latch = new CountDownLatch(1);
	Utilities.postAsyncCallback(mUiHandler, () -> {
	new MainThreadRenderer(mContext).renderScreenShot(c);
	latch.countDown();
	});

	try {
	latch.await();
	} catch (Exception e) {
	Log.e(TAG, "Error drawing on main thread", e);
	}
	}
	});
	}

	private class MainThreadRenderer extends ContextThemeWrapper
	implements ActivityContext, WorkspaceLayoutManager, LayoutInflater.Factory2 {

	private final LayoutInflater mHomeElementInflater;
	private final InsettableFrameLayout mRootView;

	private final Hotseat mHotseat;
	private final CellLayout mWorkspace;

	MainThreadRenderer(Context context) {
	super(context, R.style.AppTheme);

	mHomeElementInflater = LayoutInflater.from(
	new ContextThemeWrapper(this, R.style.HomeScreenElementTheme));
	mHomeElementInflater.setFactory2(this);

	mRootView = (InsettableFrameLayout) mHomeElementInflater.inflate(
	R.layout.launcher_preview_layout, null, false);
	mRootView.setInsets(mInsets);
	measureView(mRootView, mDp.widthPx, mDp.heightPx);

	mHotseat = mRootView.findViewById(R.id.hotseat);
	mHotseat.resetLayout(false);

	mWorkspace = mRootView.findViewById(R.id.workspace);
	mWorkspace.setPadding(mDp.workspacePadding.left + mDp.cellLayoutPaddingLeftRightPx,
	mDp.workspacePadding.top,
	mDp.workspacePadding.right + mDp.cellLayoutPaddingLeftRightPx,
	mDp.workspacePadding.bottom);
	}

	@Override
	public View onCreateView(View parent, String name, Context context, AttributeSet attrs) {
	if ("TextClock".equals(name)) {
	// Workaround for TextClock accessing handler for unregistering ticker.
	return new TextClock(context, attrs) {

	@Override
	public Handler getHandler() {
	return mUiHandler;
	}
	};
	} else if (!"fragment".equals(name)) {
	return null;
	}

	TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.PreviewFragment);
	FragmentWithPreview f = (FragmentWithPreview) Fragment.instantiate(
	context, ta.getString(R.styleable.PreviewFragment_android_name));
	f.enterPreviewMode(context);
	f.onInit(null);

	View view = f.onCreateView(LayoutInflater.from(context), (ViewGroup) parent, null);
	view.setId(ta.getInt(R.styleable.PreviewFragment_android_id, View.NO_ID));
	return view;
	}

	@Override
	public View onCreateView(String name, Context context, AttributeSet attrs) {
	return onCreateView(null, name, context, attrs);
	}

	@Override
	public BaseDragLayer getDragLayer() {
	throw new UnsupportedOperationException();
	}

	@Override
	public DeviceProfile getDeviceProfile() {
	return mDp;
	}

	@Override
	public Hotseat getHotseat() {
	return mHotseat;
	}

	@Override
	public CellLayout getScreenWithId(int screenId) {
	return mWorkspace;
	}

	private void inflateAndAddIcon(WorkspaceItemInfo info) {
	BubbleTextView icon = (BubbleTextView) mHomeElementInflater.inflate(
	R.layout.app_icon, mWorkspace, false);
	icon.applyFromWorkspaceItem(info);
	addInScreenFromBind(icon, info);
	}

	private void dispatchVisibilityAggregated(View view, boolean isVisible) {
	// Similar to View.dispatchVisibilityAggregated implementation.
	final boolean thisVisible = view.getVisibility() == VISIBLE;
	if (thisVisible \|\| !isVisible) {
	view.onVisibilityAggregated(isVisible);
	}

	if (view instanceof ViewGroup) {
	isVisible = thisVisible && isVisible;
	ViewGroup vg = (ViewGroup) view;
	int count = vg.getChildCount();

	for (int i = 0; i < count; i++) {
	dispatchVisibilityAggregated(vg.getChildAt(i), isVisible);
	}
	}
	}

	private void renderScreenShot(Canvas canvas) {
	// Add hotseat icons
	for (int i = 0; i < mIdp.numHotseatIcons; i++) {
	WorkspaceItemInfo info = new WorkspaceItemInfo(mWorkspaceItemInfo);
	info.container = Favorites.CONTAINER_HOTSEAT;
	info.screenId = i;
	inflateAndAddIcon(info);
	}

	// Add workspace icons
	for (int i = 0; i < mIdp.numColumns; i++) {
	WorkspaceItemInfo info = new WorkspaceItemInfo(mWorkspaceItemInfo);
	info.container = Favorites.CONTAINER_DESKTOP;
	info.screenId = 0;
	info.cellX = i;
	info.cellY = mIdp.numRows - 1;
	inflateAndAddIcon(info);
	}

	// Add first page QSB
	if (FeatureFlags.QSB_ON_FIRST_SCREEN) {
	View qsb = mHomeElementInflater.inflate(
	R.layout.search_container_workspace, mWorkspace, false);
	CellLayout.LayoutParams lp =
	new CellLayout.LayoutParams(0, 0, mWorkspace.getCountX(), 1);
	lp.canReorder = false;
	mWorkspace.addViewToCellLayout(qsb, 0, R.id.search_container_workspace, lp, true);
	}

	// Setup search view
	SearchUiManager searchUiManager =
	mRootView.findViewById(R.id.search_container_all_apps);
	mRootView.findViewById(R.id.apps_view).setTranslationY(
	mDp.heightPx - searchUiManager.getScrollRangeDelta(mInsets));

	measureView(mRootView, mDp.widthPx, mDp.heightPx);
	dispatchVisibilityAggregated(mRootView, true);
	measureView(mRootView, mDp.widthPx, mDp.heightPx);
	// Additional measure for views which use auto text size API
	measureView(mRootView, mDp.widthPx, mDp.heightPx);

	mRootView.draw(canvas);
	dispatchVisibilityAggregated(mRootView, false);
	}
	}

	private static void measureView(View view, int width, int height) {
	view.measure(makeMeasureSpec(width, EXACTLY), makeMeasureSpec(height, EXACTLY));
	view.layout(0, 0, width, height);
	}
	}