Moving all apps code into sub package.

- Renaming resources, dimens, etc to be more consistent
- Removing old AppsCustomize resources and other unused code

Change-Id: I15ce35e7cb7a9b9344fc7103963e4e4c9e45d89a

1 files changed, 528 insertions, 0 deletions

diff --git a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
new file mode 100644
index 000000000..e95fa325a
--- /dev/null
+++ b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
@@ -0,0 +1,528 @@
+/*
+ * 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.launcher3.allapps;
+
+import android.animation.ObjectAnimator;
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewConfiguration;
+import com.android.launcher3.BaseRecyclerView;
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+
+import java.util.List;
+
+/**
+ * A RecyclerView with custom fastscroll support.  This is the main container for the all apps
+ * icons.
+ */
+public class AllAppsRecyclerView extends BaseRecyclerView {
+
+    /**
+     * The current scroll state of the recycler view.  We use this in updateVerticalScrollbarBounds()
+     * and scrollToPositionAtProgress() to determine the scroll position of the recycler view so
+     * that we can calculate what the scroll bar looks like, and where to jump to from the fast
+     * scroller.
+     */
+    private static class ScrollPositionState {
+        // The index of the first visible row
+        int rowIndex;
+        // The offset of the first visible row
+        int rowTopOffset;
+        // The height of a given row (they are currently all the same height)
+        int rowHeight;
+    }
+
+    private static final float FAST_SCROLL_OVERLAY_Y_OFFSET_FACTOR = 1.5f;
+
+    private AlphabeticalAppsList mApps;
+    private int mNumAppsPerRow;
+    private int mNumPredictedAppsPerRow;
+
+    private Drawable mScrollbar;
+    private Drawable mFastScrollerBg;
+    private Rect mTmpFastScrollerInvalidateRect = new Rect();
+    private Rect mFastScrollerBounds = new Rect();
+    private Rect mVerticalScrollbarBounds = new Rect();
+    private boolean mDraggingFastScroller;
+    private String mFastScrollSectionName;
+    private Paint mFastScrollTextPaint;
+    private Rect mFastScrollTextBounds = new Rect();
+    private float mFastScrollAlpha;
+    private int mPredictionBarHeight;
+    private int mDownX;
+    private int mDownY;
+    private int mLastX;
+    private int mLastY;
+    private int mScrollbarWidth;
+    private int mScrollbarMinHeight;
+    private int mScrollbarInset;
+    private Rect mBackgroundPadding = new Rect();
+    private ScrollPositionState mScrollPosState = new ScrollPositionState();
+
+    private Launcher mLauncher;
+
+    public AllAppsRecyclerView(Context context) {
+        this(context, null);
+    }
+
+    public AllAppsRecyclerView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public AllAppsRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public AllAppsRecyclerView(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr);
+
+        mLauncher = (Launcher) context;
+        Resources res = context.getResources();
+        int fastScrollerSize = res.getDimensionPixelSize(R.dimen.all_apps_fast_scroll_popup_size);
+        mScrollbar = res.getDrawable(R.drawable.all_apps_scrollbar_thumb);
+        mFastScrollerBg = res.getDrawable(R.drawable.all_apps_fastscroll_bg);
+        mFastScrollerBg.setBounds(0, 0, fastScrollerSize, fastScrollerSize);
+        mFastScrollTextPaint = new Paint();
+        mFastScrollTextPaint.setColor(Color.WHITE);
+        mFastScrollTextPaint.setAntiAlias(true);
+        mFastScrollTextPaint.setTextSize(res.getDimensionPixelSize(
+                R.dimen.all_apps_fast_scroll_text_size));
+        mScrollbarWidth = res.getDimensionPixelSize(R.dimen.all_apps_fast_scroll_bar_width);
+        mScrollbarMinHeight =
+                res.getDimensionPixelSize(R.dimen.all_apps_fast_scroll_bar_min_height);
+        mScrollbarInset =
+                res.getDimensionPixelSize(R.dimen.all_apps_fast_scroll_scrubber_touch_inset);
+        setFastScrollerAlpha(getFastScrollerAlpha());
+        setOverScrollMode(View.OVER_SCROLL_NEVER);
+    }
+
+    /**
+     * Sets the list of apps in this view, used to determine the fastscroll position.
+     */
+    public void setApps(AlphabeticalAppsList apps) {
+        mApps = apps;
+    }
+
+    /**
+     * Sets the number of apps per row in this recycler view.
+     */
+    public void setNumAppsPerRow(int numAppsPerRow, int numPredictedAppsPerRow) {
+        mNumAppsPerRow = numAppsPerRow;
+        mNumPredictedAppsPerRow = numPredictedAppsPerRow;
+
+        DeviceProfile grid = mLauncher.getDeviceProfile();
+        RecyclerView.RecycledViewPool pool = getRecycledViewPool();
+        int approxRows = (int) Math.ceil(grid.availableHeightPx / grid.allAppsIconSizePx);
+        pool.setMaxRecycledViews(AllAppsGridAdapter.PREDICTION_BAR_SPACER_TYPE, 1);
+        pool.setMaxRecycledViews(AllAppsGridAdapter.EMPTY_SEARCH_VIEW_TYPE, 1);
+        pool.setMaxRecycledViews(AllAppsGridAdapter.ICON_VIEW_TYPE, approxRows * mNumAppsPerRow);
+        pool.setMaxRecycledViews(AllAppsGridAdapter.SECTION_BREAK_VIEW_TYPE, approxRows);
+    }
+
+    public void updateBackgroundPadding(Drawable background) {
+        background.getPadding(mBackgroundPadding);
+    }
+
+    /**
+     * Sets the prediction bar height.
+     */
+    public void setPredictionBarHeight(int height) {
+        mPredictionBarHeight = height;
+    }
+
+    /**
+     * Sets the fast scroller alpha.
+     */
+    public void setFastScrollerAlpha(float alpha) {
+        mFastScrollAlpha = alpha;
+        invalidateFastScroller(mFastScrollerBounds);
+    }
+
+    /**
+     * Gets the fast scroller alpha.
+     */
+    public float getFastScrollerAlpha() {
+        return mFastScrollAlpha;
+    }
+
+    /**
+     * Returns the scroll bar width.
+     */
+    public int getScrollbarWidth() {
+        return mScrollbarWidth;
+    }
+
+    /**
+     * Scrolls this recycler view to the top.
+     */
+    public void scrollToTop() {
+        scrollToPosition(0);
+    }
+
+    /**
+     * Returns the current scroll position.
+     */
+    public int getScrollPosition() {
+        List<AlphabeticalAppsList.AdapterItem> items = mApps.getAdapterItems();
+        getCurScrollState(mScrollPosState, items);
+        if (mScrollPosState.rowIndex != -1) {
+            int predictionBarHeight = mApps.getPredictedApps().isEmpty() ? 0 : mPredictionBarHeight;
+            return getPaddingTop() + (mScrollPosState.rowIndex * mScrollPosState.rowHeight) +
+                    predictionBarHeight - mScrollPosState.rowTopOffset;
+        }
+        return 0;
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        addOnItemTouchListener(this);
+    }
+
+    @Override
+    protected void dispatchDraw(Canvas canvas) {
+        super.dispatchDraw(canvas);
+        drawVerticalScrubber(canvas);
+        drawFastScrollerPopup(canvas);
+    }
+
+    /**
+     * We intercept the touch handling only to support fast scrolling when initiated from the
+     * scroll bar.  Otherwise, we fall back to the default RecyclerView touch handling.
+     */
+    @Override
+    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent ev) {
+        return handleTouchEvent(ev);
+    }
+
+    @Override
+    public void onTouchEvent(RecyclerView rv, MotionEvent ev) {
+        handleTouchEvent(ev);
+    }
+
+    /**
+     * Handles the touch event and determines whether to show the fast scroller (or updates it if
+     * it is already showing).
+     */
+    private boolean handleTouchEvent(MotionEvent ev) {
+        ViewConfiguration config = ViewConfiguration.get(getContext());
+
+        int action = ev.getAction();
+        int x = (int) ev.getX();
+        int y = (int) ev.getY();
+        switch (action) {
+            case MotionEvent.ACTION_DOWN:
+                // Keep track of the down positions
+                mDownX = mLastX = x;
+                mDownY = mLastY = y;
+                if (shouldStopScroll(ev)) {
+                    stopScroll();
+                }
+                break;
+            case MotionEvent.ACTION_MOVE:
+                // Check if we are scrolling
+                if (!mDraggingFastScroller && isPointNearScrollbar(mDownX, mDownY) &&
+                        Math.abs(y - mDownY) > config.getScaledTouchSlop()) {
+                    getParent().requestDisallowInterceptTouchEvent(true);
+                    mDraggingFastScroller = true;
+                    animateFastScrollerVisibility(true);
+                }
+                if (mDraggingFastScroller) {
+                    mLastX = x;
+                    mLastY = y;
+
+                    // Scroll to the right position, and update the section name
+                    int top = getPaddingTop() + (mFastScrollerBg.getBounds().height() / 2);
+                    int bottom = getHeight() - getPaddingBottom() -
+                            (mFastScrollerBg.getBounds().height() / 2);
+                    float boundedY = (float) Math.max(top, Math.min(bottom, y));
+                    mFastScrollSectionName = scrollToPositionAtProgress((boundedY - top) /
+                            (bottom - top));
+
+                    // Combine the old and new fast scroller bounds to create the full invalidate
+                    // rect
+                    mTmpFastScrollerInvalidateRect.set(mFastScrollerBounds);
+                    updateFastScrollerBounds();
+                    mTmpFastScrollerInvalidateRect.union(mFastScrollerBounds);
+                    invalidateFastScroller(mTmpFastScrollerInvalidateRect);
+                }
+                break;
+            case MotionEvent.ACTION_UP:
+            case MotionEvent.ACTION_CANCEL:
+                mDraggingFastScroller = false;
+                animateFastScrollerVisibility(false);
+                break;
+        }
+        return mDraggingFastScroller;
+    }
+
+    /**
+     * Animates the visibility of the fast scroller popup.
+     */
+    private void animateFastScrollerVisibility(boolean visible) {
+        ObjectAnimator anim = ObjectAnimator.ofFloat(this, "fastScrollerAlpha", visible ? 1f : 0f);
+        anim.setDuration(visible ? 200 : 150);
+        anim.start();
+    }
+
+    /**
+     * Returns whether a given point is near the scrollbar.
+     */
+    private boolean isPointNearScrollbar(int x, int y) {
+        // Check if we are scrolling
+        updateVerticalScrollbarBounds();
+        mVerticalScrollbarBounds.inset(mScrollbarInset, mScrollbarInset);
+        return mVerticalScrollbarBounds.contains(x, y);
+    }
+
+    /**
+     * Draws the fast scroller popup.
+     */
+    private void drawFastScrollerPopup(Canvas canvas) {
+        if (mFastScrollAlpha > 0f && !mFastScrollSectionName.isEmpty()) {
+            // Draw the fast scroller popup
+            int restoreCount = canvas.save(Canvas.MATRIX_SAVE_FLAG);
+            canvas.translate(mFastScrollerBounds.left, mFastScrollerBounds.top);
+            mFastScrollerBg.setAlpha((int) (mFastScrollAlpha * 255));
+            mFastScrollerBg.draw(canvas);
+            mFastScrollTextPaint.setAlpha((int) (mFastScrollAlpha * 255));
+            mFastScrollTextPaint.getTextBounds(mFastScrollSectionName, 0,
+                    mFastScrollSectionName.length(), mFastScrollTextBounds);
+            float textWidth = mFastScrollTextPaint.measureText(mFastScrollSectionName);
+            canvas.drawText(mFastScrollSectionName,
+                    (mFastScrollerBounds.width() - textWidth) / 2,
+                    mFastScrollerBounds.height() -
+                            (mFastScrollerBounds.height() - mFastScrollTextBounds.height()) / 2,
+                    mFastScrollTextPaint);
+            canvas.restoreToCount(restoreCount);
+        }
+    }
+
+    /**
+     * Draws the vertical scrollbar.
+     */
+    private void drawVerticalScrubber(Canvas canvas) {
+        updateVerticalScrollbarBounds();
+
+        // Draw the scroll bar
+        int restoreCount = canvas.save(Canvas.MATRIX_SAVE_FLAG);
+        canvas.translate(mVerticalScrollbarBounds.left, mVerticalScrollbarBounds.top);
+        mScrollbar.setBounds(0, 0, mScrollbarWidth, mVerticalScrollbarBounds.height());
+        mScrollbar.draw(canvas);
+        canvas.restoreToCount(restoreCount);
+    }
+
+    /**
+     * Invalidates the fast scroller popup.
+     */
+    private void invalidateFastScroller(Rect bounds) {
+        invalidate(bounds.left, bounds.top, bounds.right, bounds.bottom);
+    }
+
+    /**
+     * Maps the touch (from 0..1) to the adapter position that should be visible.
+     */
+    private String scrollToPositionAtProgress(float touchFraction) {
+        // Ensure that we have any sections
+        List<AlphabeticalAppsList.FastScrollSectionInfo> fastScrollSections =
+                mApps.getFastScrollerSections();
+        if (fastScrollSections.isEmpty()) {
+            return "";
+        }
+
+        // Stop the scroller if it is scrolling
+        LinearLayoutManager layoutManager = (LinearLayoutManager) getLayoutManager();
+        stopScroll();
+
+        // If there is a prediction bar, then capture the appropriate area for the prediction bar
+        float predictionBarFraction = 0f;
+        if (!mApps.getPredictedApps().isEmpty()) {
+            predictionBarFraction = (float) mNumPredictedAppsPerRow / mApps.getSize();
+            if (touchFraction <= predictionBarFraction) {
+                // Scroll to the top of the view, where the prediction bar is
+                layoutManager.scrollToPositionWithOffset(0, 0);
+                return "";
+            }
+        }
+
+        // Since the app ranges are from 0..1, we need to map the touch fraction back to 0..1 from
+        // predictionBarFraction..1
+        touchFraction = (touchFraction - predictionBarFraction) *
+                (1f / (1f - predictionBarFraction));
+        AlphabeticalAppsList.FastScrollSectionInfo lastScrollSection = fastScrollSections.get(0);
+        for (int i = 1; i < fastScrollSections.size(); i++) {
+            AlphabeticalAppsList.FastScrollSectionInfo scrollSection = fastScrollSections.get(i);
+            if (lastScrollSection.appRangeFraction <= touchFraction &&
+                    touchFraction < scrollSection.appRangeFraction) {
+                break;
+            }
+            lastScrollSection = scrollSection;
+        }
+
+        // Scroll to the view at the position, anchored at the top of the screen. We call the scroll
+        // method on the LayoutManager directly since it is not exposed by RecyclerView.
+        layoutManager.scrollToPositionWithOffset(lastScrollSection.appItem.position, 0);
+
+        return lastScrollSection.sectionName;
+    }
+
+    /**
+     * Updates the bounds for the scrollbar.
+     */
+    private void updateVerticalScrollbarBounds() {
+        List<AlphabeticalAppsList.AdapterItem> items = mApps.getAdapterItems();
+
+        // Skip early if there are no items
+        if (items.isEmpty()) {
+            mVerticalScrollbarBounds.setEmpty();
+            return;
+        }
+
+        // Find the index and height of the first visible row (all rows have the same height)
+        int x;
+        int y;
+        int predictionBarHeight = mApps.getPredictedApps().isEmpty() ? 0 : mPredictionBarHeight;
+        int rowCount = getNumRows();
+        getCurScrollState(mScrollPosState, items);
+        if (mScrollPosState.rowIndex != -1) {
+            int height = getHeight() - getPaddingTop() - getPaddingBottom();
+            int totalScrollHeight = rowCount * mScrollPosState.rowHeight + predictionBarHeight;
+            if (totalScrollHeight > height) {
+                int scrollbarHeight = Math.max(mScrollbarMinHeight,
+                        (int) (height / ((float) totalScrollHeight / height)));
+
+                // Calculate the position and size of the scroll bar
+                if (Utilities.isRtl(getResources())) {
+                    x = mBackgroundPadding.left;
+                } else {
+                    x = getWidth() - mBackgroundPadding.right - mScrollbarWidth;
+                }
+
+                // To calculate the offset, we compute the percentage of the total scrollable height
+                // that the user has already scrolled and then map that to the scroll bar bounds
+                int availableY = totalScrollHeight - height;
+                int availableScrollY = height - scrollbarHeight;
+                y = (mScrollPosState.rowIndex * mScrollPosState.rowHeight) + predictionBarHeight
+                        - mScrollPosState.rowTopOffset;
+                y = getPaddingTop() +
+                        (int) (((float) (getPaddingTop() + y) / availableY) * availableScrollY);
+
+                mVerticalScrollbarBounds.set(x, y, x + mScrollbarWidth, y + scrollbarHeight);
+                return;
+            }
+        }
+        mVerticalScrollbarBounds.setEmpty();
+    }
+
+    /**
+     * Updates the bounds for the fast scroller.
+     */
+    private void updateFastScrollerBounds() {
+        if (mFastScrollAlpha > 0f && !mFastScrollSectionName.isEmpty()) {
+            int x;
+            int y;
+
+            // Calculate the position for the fast scroller popup
+            Rect bgBounds = mFastScrollerBg.getBounds();
+            if (Utilities.isRtl(getResources())) {
+                x = mBackgroundPadding.left + getScrollBarSize();
+            } else {
+                x = getWidth() - getPaddingRight() - getScrollBarSize() - bgBounds.width();
+            }
+            y = mLastY - (int) (FAST_SCROLL_OVERLAY_Y_OFFSET_FACTOR * bgBounds.height());
+            y = Math.max(getPaddingTop(), Math.min(y, getHeight() - getPaddingBottom() -
+                    bgBounds.height()));
+            mFastScrollerBounds.set(x, y, x + bgBounds.width(), y + bgBounds.height());
+        } else {
+            mFastScrollerBounds.setEmpty();
+        }
+    }
+
+    /**
+     * Returns the row index for a app index in the list.
+     */
+    private int findRowForAppIndex(int index) {
+        List<AlphabeticalAppsList.SectionInfo> sections = mApps.getSections();
+        int appIndex = 0;
+        int rowCount = 0;
+        for (AlphabeticalAppsList.SectionInfo info : sections) {
+            int numRowsInSection = (int) Math.ceil((float) info.numApps / mNumAppsPerRow);
+            if (appIndex + info.numApps > index) {
+                return rowCount + ((index - appIndex) / mNumAppsPerRow);
+            }
+            appIndex += info.numApps;
+            rowCount += numRowsInSection;
+        }
+        return appIndex;
+    }
+
+    /**
+     * Returns the total number of rows in the list.
+     */
+    private int getNumRows() {
+        List<AlphabeticalAppsList.SectionInfo> sections = mApps.getSections();
+        int rowCount = 0;
+        for (AlphabeticalAppsList.SectionInfo info : sections) {
+            int numRowsInSection = (int) Math.ceil((float) info.numApps / mNumAppsPerRow);
+            rowCount += numRowsInSection;
+        }
+        return rowCount;
+    }
+
+    /**
+     * Returns the current scroll state.
+     */
+    private void getCurScrollState(ScrollPositionState stateOut,
+            List<AlphabeticalAppsList.AdapterItem> items) {
+        stateOut.rowIndex = -1;
+        stateOut.rowTopOffset = -1;
+        stateOut.rowHeight = -1;
+
+        // Return early if there are no items
+        if (items.isEmpty()) {
+            return;
+        }
+
+        int childCount = getChildCount();
+        for (int i = 0; i < childCount; i++) {
+            View child = getChildAt(i);
+            int position = getChildPosition(child);
+            if (position != NO_POSITION) {
+                AlphabeticalAppsList.AdapterItem item = items.get(position);
+                if (item.viewType == AllAppsGridAdapter.ICON_VIEW_TYPE) {
+                    stateOut.rowIndex = findRowForAppIndex(item.appIndex);
+                    stateOut.rowTopOffset = getLayoutManager().getDecoratedTop(child);
+                    stateOut.rowHeight = child.getHeight();
+                    break;
+                }
+            }
+        }
+    }
+}