content: /*
   * Copyright (C) 2011 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.actionbarsherlock.internal.widget;
  
  import android.content.Context;
  import android.content.res.Configuration;
  import android.content.res.TypedArray;
  import android.os.Build;
  import android.util.AttributeSet;
  import android.view.View;
  import android.view.animation.DecelerateInterpolator;
  import android.view.animation.Interpolator;
  
  import com.actionbarsherlock.R;
  import com.actionbarsherlock.internal.nineoldandroids.animation.Animator;
  import com.actionbarsherlock.internal.nineoldandroids.animation.AnimatorSet;
  import com.actionbarsherlock.internal.nineoldandroids.animation.ObjectAnimator;
  import com.actionbarsherlock.internal.nineoldandroids.view.NineViewGroup;
  import com.actionbarsherlock.internal.view.menu.ActionMenuPresenter;
  import com.actionbarsherlock.internal.view.menu.ActionMenuView;
  
  import static com.actionbarsherlock.internal.ResourcesCompat.getResources_getBoolean;
  
  public abstract class AbsActionBarView extends NineViewGroup {
      protected ActionMenuView mMenuView;
      protected ActionMenuPresenter mActionMenuPresenter;
      protected ActionBarContainer mSplitView;
      protected boolean mSplitActionBar;
      protected boolean mSplitWhenNarrow;
      protected int mContentHeight;
  
      final Context mContext;
  
      protected Animator mVisibilityAnim;
      protected final VisibilityAnimListener mVisAnimListener = new VisibilityAnimListener();
  
      private static final /*Time*/Interpolator sAlphaInterpolator = new DecelerateInterpolator();
  
      private static final int FADE_DURATION = 200;
  
      public AbsActionBarView(Context context) {
          super(context);
          mContext = context;
      }
  
      public AbsActionBarView(Context context, AttributeSet attrs) {
          super(context, attrs);
          mContext = context;
      }
  
      public AbsActionBarView(Context context, AttributeSet attrs, int defStyle) {
          super(context, attrs, defStyle);
          mContext = context;
      }
  
      /*
       * Must be public so we can dispatch pre-2.2 via ActionBarImpl.
       */
      @Override
      public void onConfigurationChanged(Configuration newConfig) {
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) {
              super.onConfigurationChanged(newConfig);
          } else if (mMenuView != null) {
              mMenuView.onConfigurationChanged(newConfig);
          }
  
          // Action bar can change size on configuration changes.
          // Reread the desired height from the theme-specified style.
          TypedArray a = getContext().obtainStyledAttributes(null, R.styleable.SherlockActionBar,
                  R.attr.actionBarStyle, 0);
          setContentHeight(a.getLayoutDimension(R.styleable.SherlockActionBar_height, 0));
          a.recycle();
          if (mSplitWhenNarrow) {
              setSplitActionBar(getResources_getBoolean(getContext(),
                      R.bool.abs__split_action_bar_is_narrow));
          }
          if (mActionMenuPresenter != null) {
              mActionMenuPresenter.onConfigurationChanged(newConfig);
          }
      }
  
      /**
       * Sets whether the bar should be split right now, no questions asked.
       * @param split true if the bar should split
       */
      public void setSplitActionBar(boolean split) {
          mSplitActionBar = split;
      }
  
      /**
       * Sets whether the bar should split if we enter a narrow screen configuration.
       * @param splitWhenNarrow true if the bar should check to split after a config change
       */
      public void setSplitWhenNarrow(boolean splitWhenNarrow) {
          mSplitWhenNarrow = splitWhenNarrow;
      }
  
      public void setContentHeight(int height) {
          mContentHeight = height;
          requestLayout();
      }
  
      public int getContentHeight() {
          return mContentHeight;
      }
  
      public void setSplitView(ActionBarContainer splitView) {
          mSplitView = splitView;
      }
  
      /**
       * @return Current visibility or if animating, the visibility being animated to.
       */
      public int getAnimatedVisibility() {
          if (mVisibilityAnim != null) {
              return mVisAnimListener.mFinalVisibility;
          }
          return getVisibility();
      }
  
      public void animateToVisibility(int visibility) {
          if (mVisibilityAnim != null) {
              mVisibilityAnim.cancel();
          }
          if (visibility == VISIBLE) {
              if (getVisibility() != VISIBLE) {
                  setAlpha(0);
                  if (mSplitView != null && mMenuView != null) {
                      mMenuView.setAlpha(0);
                  }
              }
              ObjectAnimator anim = ObjectAnimator.ofFloat(this, "alpha", 1);
              anim.setDuration(FADE_DURATION);
              anim.setInterpolator(sAlphaInterpolator);
              if (mSplitView != null && mMenuView != null) {
                  AnimatorSet set = new AnimatorSet();
                  ObjectAnimator splitAnim = ObjectAnimator.ofFloat(mMenuView, "alpha", 1);
                  splitAnim.setDuration(FADE_DURATION);
                  set.addListener(mVisAnimListener.withFinalVisibility(visibility));
                  set.play(anim).with(splitAnim);
                  set.start();
              } else {
                  anim.addListener(mVisAnimListener.withFinalVisibility(visibility));
                  anim.start();
              }
          } else {
              ObjectAnimator anim = ObjectAnimator.ofFloat(this, "alpha", 0);
              anim.setDuration(FADE_DURATION);
              anim.setInterpolator(sAlphaInterpolator);
              if (mSplitView != null && mMenuView != null) {
                  AnimatorSet set = new AnimatorSet();
                  ObjectAnimator splitAnim = ObjectAnimator.ofFloat(mMenuView, "alpha", 0);
                  splitAnim.setDuration(FADE_DURATION);
                  set.addListener(mVisAnimListener.withFinalVisibility(visibility));
                  set.play(anim).with(splitAnim);
                  set.start();
              } else {
                  anim.addListener(mVisAnimListener.withFinalVisibility(visibility));
                  anim.start();
              }
          }
      }
  
      @Override
      public void setVisibility(int visibility) {
          if (mVisibilityAnim != null) {
              mVisibilityAnim.end();
          }
          super.setVisibility(visibility);
      }
  
      public boolean showOverflowMenu() {
          if (mActionMenuPresenter != null) {
              return mActionMenuPresenter.showOverflowMenu();
          }
          return false;
      }
  
      public void postShowOverflowMenu() {
          post(new Runnable() {
              public void run() {
                  showOverflowMenu();
              }
          });
      }
  
      public boolean hideOverflowMenu() {
          if (mActionMenuPresenter != null) {
              return mActionMenuPresenter.hideOverflowMenu();
          }
          return false;
      }
  
      public boolean isOverflowMenuShowing() {
          if (mActionMenuPresenter != null) {
              return mActionMenuPresenter.isOverflowMenuShowing();
          }
          return false;
      }
  
      public boolean isOverflowReserved() {
          return mActionMenuPresenter != null && mActionMenuPresenter.isOverflowReserved();
      }
  
      public void dismissPopupMenus() {
          if (mActionMenuPresenter != null) {
              mActionMenuPresenter.dismissPopupMenus();
          }
      }
  
      protected int measureChildView(View child, int availableWidth, int childSpecHeight,
              int spacing) {
          child.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST),
                  childSpecHeight);
  
          availableWidth -= child.getMeasuredWidth();
          availableWidth -= spacing;
  
          return Math.max(0, availableWidth);
      }
  
      protected int positionChild(View child, int x, int y, int contentHeight) {
          int childWidth = child.getMeasuredWidth();
          int childHeight = child.getMeasuredHeight();
          int childTop = y + (contentHeight - childHeight) / 2;
  
          child.layout(x, childTop, x + childWidth, childTop + childHeight);
  
          return childWidth;
      }
  
      protected int positionChildInverse(View child, int x, int y, int contentHeight) {
          int childWidth = child.getMeasuredWidth();
          int childHeight = child.getMeasuredHeight();
          int childTop = y + (contentHeight - childHeight) / 2;
  
          child.layout(x - childWidth, childTop, x, childTop + childHeight);
  
          return childWidth;
      }
  
      protected class VisibilityAnimListener implements Animator.AnimatorListener {
          private boolean mCanceled = false;
          int mFinalVisibility;
  
          public VisibilityAnimListener withFinalVisibility(int visibility) {
              mFinalVisibility = visibility;
              return this;
          }
  
          @Override
          public void onAnimationStart(Animator animation) {
              setVisibility(VISIBLE);
              mVisibilityAnim = animation;
              mCanceled = false;
          }
  
          @Override
          public void onAnimationEnd(Animator animation) {
              if (mCanceled) return;
  
              mVisibilityAnim = null;
              setVisibility(mFinalVisibility);
              if (mSplitView != null && mMenuView != null) {
                  mMenuView.setVisibility(mFinalVisibility);
              }
          }
  
          @Override
          public void onAnimationCancel(Animator animation) {
              mCanceled = true;
          }
  
          @Override
          public void onAnimationRepeat(Animator animation) {
          }
      }
  }
  