/*
* Copyright (C) 2010 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.internal.widget;
import android.annotation.NonNull;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Outline;
import android.graphics.PixelFormat;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.ActionMode;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import java.util.List;
/**
* This class acts as a container for the action bar view and action mode context views.
* It applies special styles as needed to help handle animated transitions between them.
* @hide
*/
public class ActionBarContainer extends FrameLayout {
private boolean mIsTransitioning;
private View mTabContainer;
private View mActionBarView;
private View mActionContextView;
private Drawable mBackground;
private Drawable mStackedBackground;
private Drawable mSplitBackground;
private boolean mIsSplit;
private boolean mIsStacked;
private int mHeight;
public ActionBarContainer(Context context) {
this(context, null);
}
public ActionBarContainer(Context context, AttributeSet attrs) {
super(context, attrs);
// Set a transparent background so that we project appropriately.
setBackground(new ActionBarBackgroundDrawable());
TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.ActionBar);
mBackground = a.getDrawable(com.android.internal.R.styleable.ActionBar_background);
mStackedBackground = a.getDrawable(
com.android.internal.R.styleable.ActionBar_backgroundStacked);
mHeight = a.getDimensionPixelSize(com.android.internal.R.styleable.ActionBar_height, -1);
if (getId() == com.android.internal.R.id.split_action_bar) {
mIsSplit = true;
mSplitBackground = a.getDrawable(
com.android.internal.R.styleable.ActionBar_backgroundSplit);
}
a.recycle();
setWillNotDraw(mIsSplit ? mSplitBackground == null :
mBackground == null && mStackedBackground == null);
}
@Override
public void onFinishInflate() {
super.onFinishInflate();
mActionBarView = findViewById(com.android.internal.R.id.action_bar);
mActionContextView = findViewById(com.android.internal.R.id.action_context_bar);
}
public void setPrimaryBackground(Drawable bg) {
if (mBackground != null) {
mBackground.setCallback(null);
unscheduleDrawable(mBackground);
}
mBackground = bg;
if (bg != null) {
bg.setCallback(this);
if (mActionBarView != null) {
mBackground.setBounds(mActionBarView.getLeft(), mActionBarView.getTop(),
mActionBarView.getRight(), mActionBarView.getBottom());
}
}
setWillNotDraw(mIsSplit ? mSplitBackground == null :
mBackground == null && mStackedBackground == null);
invalidate();
}
public void setStackedBackground(Drawable bg) {
if (mStackedBackground != null) {
mStackedBackground.setCallback(null);
unscheduleDrawable(mStackedBackground);
}
mStackedBackground = bg;
if (bg != null) {
bg.setCallback(this);
if ((mIsStacked && mStackedBackground != null)) {
mStackedBackground.setBounds(mTabContainer.getLeft(), mTabContainer.getTop(),
mTabContainer.getRight(), mTabContainer.getBottom());
}
}
setWillNotDraw(mIsSplit ? mSplitBackground == null :
mBackground == null && mStackedBackground == null);
invalidate();
}
public void setSplitBackground(Drawable bg) {
if (mSplitBackground != null) {
mSplitBackground.setCallback(null);
unscheduleDrawable(mSplitBackground);
}
mSplitBackground = bg;
if (bg != null) {
bg.setCallback(this);
if (mIsSplit && mSplitBackground != null) {
mSplitBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight());
}
}
setWillNotDraw(mIsSplit ? mSplitBackground == null :
mBackground == null && mStackedBackground == null);
invalidate();
}
@Override
public void setVisibility(int visibility) {
super.setVisibility(visibility);
final boolean isVisible = visibility == VISIBLE;
if (mBackground != null) mBackground.setVisible(isVisible, false);
if (mStackedBackground != null) mStackedBackground.setVisible(isVisible, false);
if (mSplitBackground != null) mSplitBackground.setVisible(isVisible, false);
}
@Override
protected boolean verifyDrawable(Drawable who) {
return (who == mBackground && !mIsSplit) || (who == mStackedBackground && mIsStacked) ||
(who == mSplitBackground && mIsSplit) || super.verifyDrawable(who);
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
if (mBackground != null && mBackground.isStateful()) {
mBackground.setState(getDrawableState());
}
if (mStackedBackground != null && mStackedBackground.isStateful()) {
mStackedBackground.setState(getDrawableState());
}
if (mSplitBackground != null && mSplitBackground.isStateful()) {
mSplitBackground.setState(getDrawableState());
}
}
@Override
public void jumpDrawablesToCurrentState() {
super.jumpDrawablesToCurrentState();
if (mBackground != null) {
mBackground.jumpToCurrentState();
}
if (mStackedBackground != null) {
mStackedBackground.jumpToCurrentState();
}
if (mSplitBackground != null) {
mSplitBackground.jumpToCurrentState();
}
}
/**
* @hide
*/
@Override
public void onResolveDrawables(int layoutDirection) {
super.onResolveDrawables(layoutDirection);
if (mBackground != null) {
mBackground.setLayoutDirection(layoutDirection);
}
if (mStackedBackground != null) {
mStackedBackground.setLayoutDirection(layoutDirection);
}
if (mSplitBackground != null) {
mSplitBackground.setLayoutDirection(layoutDirection);
}
}
/**
* Set the action bar into a "transitioning" state. While transitioning
* the bar will block focus and touch from all of its descendants. This
* prevents the user from interacting with the bar while it is animating
* in or out.
*
* @param isTransitioning true if the bar is currently transitioning, false otherwise.
*/
public void setTransitioning(boolean isTransitioning) {
mIsTransitioning = isTransitioning;
setDescendantFocusability(isTransitioning ? FOCUS_BLOCK_DESCENDANTS
: FOCUS_AFTER_DESCENDANTS);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return mIsTransitioning || super.onInterceptTouchEvent(ev);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
super.onTouchEvent(ev);
// An action bar always eats touch events.
return true;
}
@Override
public boolean onHoverEvent(MotionEvent ev) {
super.onHoverEvent(ev);
// An action bar always eats hover events.
return true;
}
public void setTabContainer(ScrollingTabContainerView tabView) {
if (mTabContainer != null) {
removeView(mTabContainer);
}
mTabContainer = tabView;
if (tabView != null) {
addView(tabView);
final ViewGroup.LayoutParams lp = tabView.getLayoutParams();
lp.width = LayoutParams.MATCH_PARENT;
lp.height = LayoutParams.WRAP_CONTENT;
tabView.setAllowCollapse(false);
}
}
public View getTabContainer() {
return mTabContainer;
}
@Override
public ActionMode startActionModeForChild(View child, ActionMode.Callback callback) {
// No starting an action mode for an action bar child! (Where would it go?)
return null;
}
private static boolean isCollapsed(View view) {
return view == null || view.getVisibility() == GONE || view.getMeasuredHeight() == 0;
}
private int getMeasuredHeightWithMargins(View view) {
final LayoutParams lp = (LayoutParams) view.getLayoutParams();
return view.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if (mActionBarView == null &&
MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST && mHeight >= 0) {
heightMeasureSpec = MeasureSpec.makeMeasureSpec(
Math.min(mHeight, MeasureSpec.getSize(heightMeasureSpec)), MeasureSpec.AT_MOST);
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mActionBarView == null) return;
if (mTabContainer != null && mTabContainer.getVisibility() != GONE) {
int nonTabMaxHeight = 0;
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
if (child == mTabContainer) {
continue;
}
nonTabMaxHeight = Math.max(nonTabMaxHeight, isCollapsed(child) ? 0 :
getMeasuredHeightWithMargins(child));
}
final int mode = MeasureSpec.getMode(heightMeasureSpec);
final int maxHeight = mode == MeasureSpec.AT_MOST ?
MeasureSpec.getSize(heightMeasureSpec) : Integer.MAX_VALUE;
setMeasuredDimension(getMeasuredWidth(),
Math.min(nonTabMaxHeight + getMeasuredHeightWithMargins(mTabContainer),
maxHeight));
}
}
@Override
public void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
final View tabContainer = mTabContainer;
final boolean hasTabs = tabContainer != null && tabContainer.getVisibility() != GONE;
if (tabContainer != null && tabContainer.getVisibility() != GONE) {
final int containerHeight = getMeasuredHeight();
final LayoutParams lp = (LayoutParams) tabContainer.getLayoutParams();
final int tabHeight = tabContainer.getMeasuredHeight();
tabContainer.layout(l, containerHeight - tabHeight - lp.bottomMargin, r,
containerHeight - lp.bottomMargin);
}
boolean needsInvalidate = false;
if (mIsSplit) {
if (mSplitBackground != null) {
mSplitBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight());
needsInvalidate = true;
}
} else {
if (mBackground != null) {
if (mActionBarView.getVisibility() == View.VISIBLE) {
mBackground.setBounds(mActionBarView.getLeft(), mActionBarView.getTop(),
mActionBarView.getRight(), mActionBarView.getBottom());
} else if (mActionContextView != null &&
mActionContextView.getVisibility() == View.VISIBLE) {
mBackground.setBounds(mActionContextView.getLeft(), mActionContextView.getTop(),
mActionContextView.getRight(), mActionContextView.getBottom());
} else {
mBackground.setBounds(0, 0, 0, 0);
}
needsInvalidate = true;
}
mIsStacked = hasTabs;
if (hasTabs && mStackedBackground != null) {
mStackedBackground.setBounds(tabContainer.getLeft(), tabContainer.getTop(),
tabContainer.getRight(), tabContainer.getBottom());
needsInvalidate = true;
}
}
if (needsInvalidate) {
invalidate();
}
}
/**
* Dummy drawable so that we don't break background display lists and
* projection surfaces.
*/
private class ActionBarBackgroundDrawable extends Drawable {
@Override
public void draw(Canvas canvas) {
if (mIsSplit) {
if (mSplitBackground != null) {
mSplitBackground.draw(canvas);
}
} else {
if (mBackground != null) {
mBackground.draw(canvas);
}
if (mStackedBackground != null && mIsStacked) {
mStackedBackground.draw(canvas);
}
}
}
@Override
public void getOutline(@NonNull Outline outline) {
if (mIsSplit) {
if (mSplitBackground != null) {
mSplitBackground.getOutline(outline);
}
} else {
// ignore the stacked background for shadow casting
if (mBackground != null) {
mBackground.getOutline(outline);
}
}
}
@Override
public void setAlpha(int alpha) {
}
@Override
public void setColorFilter(ColorFilter cf) {
}
@Override
public int getOpacity() {
if (mIsSplit) {
if (mSplitBackground != null
&& mSplitBackground.getOpacity() == PixelFormat.OPAQUE) {
return PixelFormat.OPAQUE;
}
} else {
if (mIsStacked && (mStackedBackground == null
|| mStackedBackground.getOpacity() != PixelFormat.OPAQUE)) {
return PixelFormat.UNKNOWN;
}
if (!isCollapsed(mActionBarView) && mBackground != null
&& mBackground.getOpacity() == PixelFormat.OPAQUE) {
return PixelFormat.OPAQUE;
}
}
return PixelFormat.UNKNOWN;
}
}
}
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