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/*
* 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;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.InsetDrawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.FrameLayout;
import com.android.launcher3.config.ProviderConfig;
/**
* A base container view, which supports resizing.
*/
public abstract class BaseContainerView extends FrameLayout implements Insettable {
private final static String TAG = "BaseContainerView";
// The window insets
private final Rect mInsets = new Rect();
// The bounds of the search bar. Only the left, top, right are used to inset the
// search bar and the height is determined by the measurement of the layout
private final Rect mFixedSearchBarBounds = new Rect();
// The computed padding to apply to the container to achieve the container bounds
protected final Rect mContentPadding = new Rect();
// The inset to apply to the edges and between the search bar and the container
private final int mContainerBoundsInset;
private final Drawable mRevealDrawable;
private View mRevealView;
private View mContent;
public BaseContainerView(Context context) {
this(context, null);
}
public BaseContainerView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public BaseContainerView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContainerBoundsInset = getResources().getDimensionPixelSize(R.dimen.container_bounds_inset);
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.BaseContainerView, defStyleAttr, 0);
mRevealDrawable = a.getDrawable(R.styleable.BaseContainerView_revealBackground);
a.recycle();
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mContent = findViewById(R.id.main_content);
mRevealView = findViewById(R.id.reveal_view);
}
@Override
final public void setInsets(Rect insets) {
mInsets.set(insets);
updateBackgroundAndPaddings();
}
/**
* Sets the search bar bounds for this container view to match.
*/
final public void setSearchBarBounds(Rect bounds) {
if (ProviderConfig.IS_DOGFOOD_BUILD && !isValidSearchBarBounds(bounds)) {
Log.e(TAG, "Invalid search bar bounds: " + bounds);
}
mFixedSearchBarBounds.set(bounds);
// Post the updates since they can trigger a relayout, and this call can be triggered from
// a layout pass itself.
post(new Runnable() {
@Override
public void run() {
updateBackgroundAndPaddings();
}
});
}
/**
* Update the backgrounds and padding in response to a change in the bounds or insets.
*/
protected void updateBackgroundAndPaddings() {
Rect padding;
if (isValidSearchBarBounds(mFixedSearchBarBounds)) {
padding = new Rect(
mFixedSearchBarBounds.left,
mInsets.top + mContainerBoundsInset,
getMeasuredWidth() - mFixedSearchBarBounds.right,
mInsets.bottom + mContainerBoundsInset
);
} else {
padding = new Rect(
mInsets.left + mContainerBoundsInset,
mInsets.top + mContainerBoundsInset,
mInsets.right + mContainerBoundsInset,
mInsets.bottom + mContainerBoundsInset
);
}
// The container padding changed, notify the container.
if (!padding.equals(mContentPadding)) {
mContentPadding.set(padding);
onUpdateBackgroundAndPaddings(padding);
}
}
private void onUpdateBackgroundAndPaddings(Rect padding) {
// Apply the top-bottom padding to itself so that the launcher transition is
// clipped correctly
setPadding(0, padding.top, 0, padding.bottom);
InsetDrawable background = new InsetDrawable(mRevealDrawable,
padding.left, 0, padding.right, 0);
mRevealView.setBackground(background.getConstantState().newDrawable());
mContent.setBackground(background);
// We let the content have a intent background, but still have full width.
// This allows the scroll bar to be used responsive outside the background bounds as well.
mContent.setPadding(0, 0, 0, 0);
Rect bgPadding = new Rect();
background.getPadding(bgPadding);
onUpdateBgPadding(padding, bgPadding);
}
protected abstract void onUpdateBgPadding(Rect padding, Rect bgPadding);
/**
* Returns whether the search bar bounds we got are considered valid.
*/
private boolean isValidSearchBarBounds(Rect searchBarBounds) {
return !searchBarBounds.isEmpty() &&
searchBarBounds.right <= getMeasuredWidth() &&
searchBarBounds.bottom <= getMeasuredHeight();
}
public final View getContentView() {
return mContent;
}
public final View getRevealView() {
return mRevealView;
}
}
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