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/*
* Copyright (C) 2022 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.content.Context;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import com.android.launcher3.celllayout.CellLayoutLayoutParams;
import com.android.launcher3.celllayout.ItemConfiguration;
import com.android.launcher3.celllayout.MulticellReorderAlgorithm;
import com.android.launcher3.util.CellAndSpan;
import com.android.launcher3.util.GridOccupancy;
import com.android.launcher3.util.MultiTranslateDelegate;
/**
* CellLayout that simulates a split in the middle for use in foldable devices.
*/
public class MultipageCellLayout extends CellLayout {
private final Drawable mLeftBackground;
private final Drawable mRightBackground;
private boolean mSeamWasAdded = false;
public MultipageCellLayout(Context context) {
this(context, null);
}
public MultipageCellLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
@Override
protected int[] findNearestArea(int relativeXPos, int relativeYPos, int minSpanX, int minSpanY,
int spanX, int spanY, boolean ignoreOccupied, int[] result, int[] resultSpan) {
return createReorderAlgorithm().simulateSeam(
() -> super.findNearestArea(relativeXPos, relativeYPos, minSpanX, minSpanY, spanX,
spanY, ignoreOccupied, result, resultSpan));
}
@Override
public boolean isNearestDropLocationOccupied(int pixelX, int pixelY, int spanX, int spanY,
View dragView, int[] result) {
return createReorderAlgorithm().simulateSeam(
() -> super.isNearestDropLocationOccupied(pixelX, pixelY, spanX, spanY, dragView,
result));
}
public MultipageCellLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mLeftBackground = getContext().getDrawable(R.drawable.bg_celllayout);
mLeftBackground.setCallback(this);
mLeftBackground.setAlpha(0);
mRightBackground = getContext().getDrawable(R.drawable.bg_celllayout);
mRightBackground.setCallback(this);
mRightBackground.setAlpha(0);
DeviceProfile deviceProfile = mActivity.getDeviceProfile();
mCountX = deviceProfile.inv.numColumns * 2;
mCountY = deviceProfile.inv.numRows;
setGridSize(mCountX, mCountY);
}
@Override
boolean createAreaForResize(int cellX, int cellY, int spanX, int spanY, View dragView,
int[] direction, boolean commit) {
// Add seam to x position
if (cellX >= mCountX / 2) {
cellX++;
}
int finalCellX = cellX;
return createReorderAlgorithm().simulateSeam(
() -> super.createAreaForResize(finalCellX, cellY, spanX, spanY, dragView,
direction, commit));
}
@Override
int[] performReorder(int pixelX, int pixelY, int minSpanX, int minSpanY, int spanX, int spanY,
View dragView, int[] result, int[] resultSpan, int mode) {
if (pixelX >= getWidth() / 2) {
pixelX += getCellWidth();
}
return super.performReorder(pixelX, pixelY, minSpanX, minSpanY, spanX, spanY, dragView,
result, resultSpan, mode);
}
@Override
public MulticellReorderAlgorithm createReorderAlgorithm() {
return new MulticellReorderAlgorithm(this);
}
@Override
public void copyCurrentStateToSolution(ItemConfiguration solution) {
int childCount = mShortcutsAndWidgets.getChildCount();
for (int i = 0; i < childCount; i++) {
View child = mShortcutsAndWidgets.getChildAt(i);
CellLayoutLayoutParams lp = (CellLayoutLayoutParams) child.getLayoutParams();
int seamOffset = lp.getCellX() >= mCountX / 2 && lp.canReorder ? 1 : 0;
CellAndSpan c = new CellAndSpan(lp.getCellX() + seamOffset, lp.getCellY(), lp.cellHSpan,
lp.cellVSpan);
solution.add(child, c);
}
}
@Override
public int getUnusedHorizontalSpace() {
return (int) Math.ceil(
(getMeasuredWidth() - getPaddingLeft() - getPaddingRight() - (mCountX * mCellWidth)
- ((mCountX - 1) * mBorderSpace.x)) / 2f);
}
@Override
protected void onDraw(Canvas canvas) {
float animatedWorkspaceMargin = mSpaceBetweenCellLayoutsPx * mSpringLoadedProgress;
if (mLeftBackground.getAlpha() > 0) {
canvas.save();
canvas.translate(-animatedWorkspaceMargin, 0);
mLeftBackground.setState(mBackground.getState());
mLeftBackground.draw(canvas);
canvas.restore();
}
if (mRightBackground.getAlpha() > 0) {
canvas.save();
canvas.translate(animatedWorkspaceMargin, 0);
mRightBackground.setState(mBackground.getState());
mRightBackground.draw(canvas);
canvas.restore();
}
super.onDraw(canvas);
}
private void updateMarginBetweenCellLayouts() {
for (int i = 0; i < mShortcutsAndWidgets.getChildCount(); i++) {
View workspaceItem = mShortcutsAndWidgets.getChildAt(i);
if (!(workspaceItem instanceof Reorderable)) {
continue;
}
CellLayoutLayoutParams params =
(CellLayoutLayoutParams) workspaceItem.getLayoutParams();
((Reorderable) workspaceItem).getTranslateDelegate().setTranslation(
MultiTranslateDelegate.INDEX_CELLAYOUT_MULTIPAGE_SPACING,
getMarginForGivenCellParams(params),
0
);
}
}
@Override
protected float getMarginForGivenCellParams(CellLayoutLayoutParams params) {
float margin = mSpaceBetweenCellLayoutsPx * mSpringLoadedProgress;
return params.getCellX() >= mCountX / 2 ? margin : -margin;
}
@Override
public void setSpringLoadedProgress(float progress) {
super.setSpringLoadedProgress(progress);
updateMarginBetweenCellLayouts();
}
@Override
public void setSpaceBetweenCellLayoutsPx(int spaceBetweenCellLayoutsPx) {
super.setSpaceBetweenCellLayoutsPx(spaceBetweenCellLayoutsPx);
updateMarginBetweenCellLayouts();
}
@Override
protected void updateBgAlpha() {
mLeftBackground.setAlpha((int) (mSpringLoadedProgress * 255));
mRightBackground.setAlpha((int) (mSpringLoadedProgress * 255));
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
Rect rect = mBackground.getBounds();
int middlePointInPixels = rect.centerX();
mLeftBackground.setBounds(rect.left, rect.top, middlePointInPixels, rect.bottom);
mRightBackground.setBounds(middlePointInPixels, rect.top, rect.right, rect.bottom);
}
public void setCountX(int countX) {
mCountX = countX;
}
public void setCountY(int countY) {
mCountY = countY;
}
public void setOccupied(GridOccupancy occupied) {
mOccupied = occupied;
}
public boolean isSeamWasAdded() {
return mSeamWasAdded;
}
public void setSeamWasAdded(boolean seamWasAdded) {
mSeamWasAdded = seamWasAdded;
}
}
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