Converting widget panel into a floating view

> The widget panel is only inflated when needed
> Using the swipe up/down interaction for widgets tray
> Removing additional view wrappers from all-apps
> Widget tray is preserved across activity recreation
> Launcher no longer has WIDGET state, the actual code around
  the states will be removed in a follow-up cl

Bug: 67678570
Bug: 67585158
Change-Id: Ia29a7c33ec81e6c53cc24e2906b7022b6f41755b

1 files changed, 222 insertions, 0 deletions

diff --git a/src/com/android/launcher3/widget/WidgetsFullSheet.java b/src/com/android/launcher3/widget/WidgetsFullSheet.java
new file mode 100644
index 000000000..72277a253
--- /dev/null
+++ b/src/com/android/launcher3/widget/WidgetsFullSheet.java
@@ -0,0 +1,222 @@
+/*
+ * Copyright (C) 2017 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.widget;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.PropertyValuesHolder;
+import android.content.Context;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.animation.AnimationUtils;
+
+import com.android.launcher3.Insettable;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAppState;
+import com.android.launcher3.LauncherAppWidgetHost.ProviderChangedListener;
+import com.android.launcher3.R;
+
+/**
+ * Popup for showing the full list of available widgets
+ */
+public class WidgetsFullSheet extends BaseWidgetSheet
+        implements Insettable, ProviderChangedListener {
+
+    private static final long DEFAULT_OPEN_DURATION = 267;
+    private static final long FADE_IN_DURATION = 150;
+    private static final float VERTICAL_START_POSITION = 0.3f;
+
+    private static final Rect sTempRect = new Rect();
+
+    private final Rect mInsets = new Rect();
+
+    private final WidgetsListAdapter mAdapter;
+
+    private View mNavBarScrim;
+    private WidgetsRecyclerView mRecyclerView;
+
+    public WidgetsFullSheet(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        LauncherAppState apps = LauncherAppState.getInstance(context);
+        mAdapter = new WidgetsListAdapter(context,
+                LayoutInflater.from(context), apps.getWidgetCache(), apps.getIconCache(),
+                this, this);
+    }
+
+    public WidgetsFullSheet(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mContent = findViewById(R.id.container);
+        mNavBarScrim = findViewById(R.id.nav_bar_bg);
+
+        mRecyclerView = findViewById(R.id.widgets_list_view);
+        mRecyclerView.setAdapter(mAdapter);
+        mAdapter.setApplyBitmapDeferred(true, mRecyclerView);
+
+        mGradientView = findViewById(R.id.gradient_bg);
+        mGradientView.setProgress(1, false);
+
+        onWidgetsBound();
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        mLauncher.getAppWidgetHost().addProviderChangeListener(this);
+        notifyWidgetProvidersChanged();
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        mLauncher.getAppWidgetHost().removeProviderChangeListener(this);
+    }
+
+    @Override
+    public void setInsets(Rect insets) {
+        mInsets.set(insets);
+
+        mNavBarScrim.getLayoutParams().height = insets.bottom;
+        mRecyclerView.setPadding(
+                mRecyclerView.getPaddingLeft(), mRecyclerView.getPaddingTop(),
+                mRecyclerView.getPaddingRight(), insets.bottom);
+        if (insets.bottom > 0) {
+            setupNavBarColor();
+        }
+        requestLayout();
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        int widthUsed;
+        if (mInsets.bottom > 0) {
+            // If we have bottom insets, we do not show the scrim as it would overlap
+            // with the navbar scrim
+            mGradientView.setVisibility(View.INVISIBLE);
+            widthUsed = 0;
+        } else {
+            mLauncher.getDeviceProfile().getWorkspacePadding(sTempRect);
+            widthUsed = Math.max(sTempRect.left + sTempRect.right,
+                    2 * (mInsets.left + mInsets.right));
+        }
+
+        int heightUsed = mInsets.top + mLauncher.getDeviceProfile().edgeMarginPx;
+        measureChildWithMargins(mContent, widthMeasureSpec,
+                widthUsed, heightMeasureSpec, heightUsed);
+        measureChild(mGradientView, widthMeasureSpec, heightMeasureSpec);
+        setMeasuredDimension(mGradientView.getMeasuredWidth(), mGradientView.getMeasuredHeight());
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        int width = r - l;
+        int height = b - t;
+        mGradientView.layout(0, 0, width, height);
+
+        // Content is laid out as center bottom aligned
+        int contentWidth = mContent.getMeasuredWidth();
+        int contentLeft = (width - contentWidth) / 2;
+        mContent.layout(contentLeft, height - mContent.getMeasuredHeight(),
+                contentLeft + contentWidth, height);
+
+        setTranslationShift(mTranslationShift);
+    }
+
+    @Override
+    public void notifyWidgetProvidersChanged() {
+        mLauncher.refreshAndBindWidgetsForPackageUser(null);
+    }
+
+    @Override
+    protected void onWidgetsBound() {
+        mAdapter.setWidgets(mLauncher.getPopupDataProvider().getAllWidgets());
+    }
+
+    private void open(boolean animate) {
+        if (mIsOpen) {
+            return;
+        }
+        mIsOpen = true;
+        if (animate) {
+            if (mLauncher.getDragLayer().getInsets().bottom > 0) {
+                mContent.setAlpha(0);
+                setTranslationShift(VERTICAL_START_POSITION);
+            }
+            mOpenCloseAnimator.setValues(
+                    PropertyValuesHolder.ofFloat(TRANSLATION_SHIFT, TRANSLATION_SHIFT_OPENED));
+            mOpenCloseAnimator
+                    .setDuration(DEFAULT_OPEN_DURATION)
+                    .setInterpolator(AnimationUtils.loadInterpolator(
+                            getContext(), android.R.interpolator.linear_out_slow_in));
+            mOpenCloseAnimator.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    mRecyclerView.setLayoutFrozen(false);
+                    mAdapter.setApplyBitmapDeferred(false, mRecyclerView);
+                    mOpenCloseAnimator.removeListener(this);
+                }
+            });
+            post(new Runnable() {
+                @Override
+                public void run() {
+                    mRecyclerView.setLayoutFrozen(true);
+                    mOpenCloseAnimator.start();
+                    mContent.animate().alpha(1).setDuration(FADE_IN_DURATION);
+                }
+            });
+        } else {
+            setTranslationShift(TRANSLATION_SHIFT_OPENED);
+            mAdapter.setApplyBitmapDeferred(false, mRecyclerView);
+        }
+    }
+
+    @Override
+    protected void handleClose(boolean animate) {
+        handleClose(animate, DEFAULT_OPEN_DURATION);
+    }
+
+    @Override
+    protected boolean isOfType(int type) {
+        return (type & TYPE_WIDGETS_FULL_SHEET) != 0;
+    }
+
+    @Override
+    public boolean onControllerInterceptTouchEvent(MotionEvent ev) {
+        // Disable swipe down when recycler view is scrolling
+        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+            mNoIntercept = false;
+            if (mLauncher.getDragLayer().isEventOverView(mContent, ev)) {
+                mNoIntercept = !mRecyclerView.shouldContainerScroll(ev, mLauncher.getDragLayer());
+            }
+        }
+        return super.onControllerInterceptTouchEvent(ev);
+    }
+
+    public static WidgetsFullSheet show(Launcher launcher, boolean animate) {
+        WidgetsFullSheet sheet = (WidgetsFullSheet) launcher.getLayoutInflater()
+                .inflate(R.layout.widgets_full_sheet, launcher.getDragLayer(), false);
+        launcher.getDragLayer().addView(sheet);
+        sheet.open(animate);
+        return sheet;
+    }
+}