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package com.android.launcher3;
import android.annotation.TargetApi;
import android.app.ActivityManager;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewDebug;
import static com.android.launcher3.util.SystemUiController.FLAG_DARK_NAV;
import static com.android.launcher3.util.SystemUiController.UI_STATE_ROOT_VIEW;
public class LauncherRootView extends InsettableFrameLayout {
private final Paint mOpaquePaint;
@ViewDebug.ExportedProperty(category = "launcher")
private boolean mDrawSideInsetBar;
@ViewDebug.ExportedProperty(category = "launcher")
private int mLeftInsetBarWidth;
@ViewDebug.ExportedProperty(category = "launcher")
private int mRightInsetBarWidth;
private View mAlignedView;
public LauncherRootView(Context context, AttributeSet attrs) {
super(context, attrs);
mOpaquePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mOpaquePaint.setColor(Color.BLACK);
mOpaquePaint.setStyle(Paint.Style.FILL);
}
@Override
protected void onFinishInflate() {
if (getChildCount() > 0) {
// LauncherRootView contains only one child, which should be aligned
// based on the horizontal insets.
mAlignedView = getChildAt(0);
}
super.onFinishInflate();
}
@TargetApi(23)
@Override
protected boolean fitSystemWindows(Rect insets) {
mDrawSideInsetBar = (insets.right > 0 || insets.left > 0) &&
(!Utilities.ATLEAST_MARSHMALLOW ||
getContext().getSystemService(ActivityManager.class).isLowRamDevice());
if (mDrawSideInsetBar) {
mLeftInsetBarWidth = insets.left;
mRightInsetBarWidth = insets.right;
insets = new Rect(0, insets.top, 0, insets.bottom);
} else {
mLeftInsetBarWidth = mRightInsetBarWidth = 0;
}
Launcher.getLauncher(getContext()).getSystemUiController().updateUiState(
UI_STATE_ROOT_VIEW, mDrawSideInsetBar ? FLAG_DARK_NAV : 0);
boolean rawInsetsChanged = !mInsets.equals(insets);
setInsets(insets);
if (mAlignedView != null) {
// Apply margins on aligned view to handle left/right insets.
MarginLayoutParams lp = (MarginLayoutParams) mAlignedView.getLayoutParams();
if (lp.leftMargin != mLeftInsetBarWidth || lp.rightMargin != mRightInsetBarWidth) {
lp.leftMargin = mLeftInsetBarWidth;
lp.rightMargin = mRightInsetBarWidth;
mAlignedView.setLayoutParams(lp);
}
}
if (rawInsetsChanged) {
// Update the grid again
Launcher launcher = Launcher.getLauncher(getContext());
launcher.onInsetsChanged(insets);
}
return true; // I'll take it from here
}
@Override
protected void dispatchDraw(Canvas canvas) {
super.dispatchDraw(canvas);
// If the right inset is opaque, draw a black rectangle to ensure that is stays opaque.
if (mDrawSideInsetBar) {
if (mRightInsetBarWidth > 0) {
int width = getWidth();
canvas.drawRect(width - mRightInsetBarWidth, 0, width, getHeight(), mOpaquePaint);
}
if (mLeftInsetBarWidth > 0) {
canvas.drawRect(0, 0, mLeftInsetBarWidth, getHeight(), mOpaquePaint);
}
}
}
}
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