content: /*
   * Copyright (C) 2008 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;
  
  import android.app.WallpaperManager;
  import android.content.Context;
  import android.graphics.Rect;
  import android.view.View;
  import android.view.ViewGroup;
  
  import com.android.launcher3.CellLayout.ContainerType;
  
  public class ShortcutAndWidgetContainer extends ViewGroup {
      static final String TAG = "ShortcutAndWidgetContainer";
  
      // These are temporary variables to prevent having to allocate a new object just to
      // return an (x, y) value from helper functions. Do NOT use them to maintain other state.
      private final int[] mTmpCellXY = new int[2];
  
      @ContainerType private final int mContainerType;
      private final WallpaperManager mWallpaperManager;
  
      private int mCellWidth;
      private int mCellHeight;
  
      private int mCountX;
  
      private Launcher mLauncher;
      private boolean mInvertIfRtl = false;
  
      public ShortcutAndWidgetContainer(Context context, @ContainerType int containerType) {
          super(context);
          mLauncher = Launcher.getLauncher(context);
          mWallpaperManager = WallpaperManager.getInstance(context);
          mContainerType = containerType;
      }
  
      public void setCellDimensions(int cellWidth, int cellHeight, int countX, int countY) {
          mCellWidth = cellWidth;
          mCellHeight = cellHeight;
          mCountX = countX;
      }
  
      public View getChildAt(int x, int y) {
          final int count = getChildCount();
          for (int i = 0; i < count; i++) {
              View child = getChildAt(i);
              CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams();
  
              if ((lp.cellX <= x) && (x < lp.cellX + lp.cellHSpan) &&
                      (lp.cellY <= y) && (y < lp.cellY + lp.cellVSpan)) {
                  return child;
              }
          }
          return null;
      }
  
      @Override
      protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
          int count = getChildCount();
  
          int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
          int heightSpecSize =  MeasureSpec.getSize(heightMeasureSpec);
          setMeasuredDimension(widthSpecSize, heightSpecSize);
  
          for (int i = 0; i < count; i++) {
              View child = getChildAt(i);
              if (child.getVisibility() != GONE) {
                  measureChild(child);
              }
          }
      }
  
      public void setupLp(View child) {
          CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams();
          if (child instanceof LauncherAppWidgetHostView) {
              DeviceProfile profile = mLauncher.getDeviceProfile();
              lp.setup(mCellWidth, mCellHeight, invertLayoutHorizontally(), mCountX,
                      profile.appWidgetScale.x, profile.appWidgetScale.y);
          } else {
              lp.setup(mCellWidth, mCellHeight, invertLayoutHorizontally(), mCountX);
          }
      }
  
      // Set whether or not to invert the layout horizontally if the layout is in RTL mode.
      public void setInvertIfRtl(boolean invert) {
          mInvertIfRtl = invert;
      }
  
      public int getCellContentHeight() {
          return Math.min(getMeasuredHeight(),
                  mLauncher.getDeviceProfile().getCellHeight(mContainerType));
      }
  
      public void measureChild(View child) {
          CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams();
          if (!lp.isFullscreen) {
              final DeviceProfile profile = mLauncher.getDeviceProfile();
  
              if (child instanceof LauncherAppWidgetHostView) {
                  lp.setup(mCellWidth, mCellHeight, invertLayoutHorizontally(), mCountX,
                          profile.appWidgetScale.x, profile.appWidgetScale.y);
                  // Widgets have their own padding
              } else {
                  lp.setup(mCellWidth, mCellHeight, invertLayoutHorizontally(), mCountX);
                  // Center the icon/folder
                  int cHeight = getCellContentHeight();
                  int cellPaddingY = (int) Math.max(0, ((lp.height - cHeight) / 2f));
                  int cellPaddingX = mContainerType == CellLayout.WORKSPACE
                          ? profile.workspaceCellPaddingXPx
                          : (int) (profile.edgeMarginPx / 2f);
                  child.setPadding(cellPaddingX, cellPaddingY, cellPaddingX, 0);
              }
          } else {
              lp.x = 0;
              lp.y = 0;
              lp.width = getMeasuredWidth();
              lp.height = getMeasuredHeight();
          }
          int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(lp.width, MeasureSpec.EXACTLY);
          int childheightMeasureSpec = MeasureSpec.makeMeasureSpec(lp.height, MeasureSpec.EXACTLY);
          child.measure(childWidthMeasureSpec, childheightMeasureSpec);
      }
  
      public boolean invertLayoutHorizontally() {
          return mInvertIfRtl && Utilities.isRtl(getResources());
      }
  
      @Override
      protected void onLayout(boolean changed, int l, int t, int r, int b) {
          int count = getChildCount();
          for (int i = 0; i < count; i++) {
              final View child = getChildAt(i);
              if (child.getVisibility() != GONE) {
                  CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams();
  
                  if (child instanceof LauncherAppWidgetHostView) {
                      LauncherAppWidgetHostView lahv = (LauncherAppWidgetHostView) child;
  
                      // Scale and center the widget to fit within its cells.
                      DeviceProfile profile = mLauncher.getDeviceProfile();
                      float scaleX = profile.appWidgetScale.x;
                      float scaleY = profile.appWidgetScale.y;
  
                      lahv.setScaleToFit(Math.min(scaleX, scaleY));
                      lahv.setTranslationForCentering(-(lp.width - (lp.width * scaleX)) / 2.0f,
                              -(lp.height - (lp.height * scaleY)) / 2.0f);
                  }
  
                  int childLeft = lp.x;
                  int childTop = lp.y;
                  child.layout(childLeft, childTop, childLeft + lp.width, childTop + lp.height);
  
                  if (lp.dropped) {
                      lp.dropped = false;
  
                      final int[] cellXY = mTmpCellXY;
                      getLocationOnScreen(cellXY);
                      mWallpaperManager.sendWallpaperCommand(getWindowToken(),
                              WallpaperManager.COMMAND_DROP,
                              cellXY[0] + childLeft + lp.width / 2,
                              cellXY[1] + childTop + lp.height / 2, 0, null);
                  }
              }
          }
      }
  
      @Override
      public boolean shouldDelayChildPressedState() {
          return false;
      }
  
      @Override
      public void requestChildFocus(View child, View focused) {
          super.requestChildFocus(child, focused);
          if (child != null) {
              Rect r = new Rect();
              child.getDrawingRect(r);
              requestRectangleOnScreen(r);
          }
      }
  
      @Override
      public void cancelLongPress() {
          super.cancelLongPress();
  
          // Cancel long press for all children
          final int count = getChildCount();
          for (int i = 0; i < count; i++) {
              final View child = getChildAt(i);
              child.cancelLongPress();
          }
      }
  }
  