core/java/com/android/internal/view/FloatingActionMode.java - platform/frameworks/base - Git at Google

 /*
  * 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.internal.view;

 import android.content.Context;
 import android.graphics.Rect;
 import android.view.ActionMode;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewConfiguration;

 import com.android.internal.R;
 import com.android.internal.util.Preconditions;
 import com.android.internal.view.menu.MenuBuilder;
 import com.android.internal.widget.FloatingToolbar;

 import java.util.Arrays;

 public class FloatingActionMode extends ActionMode {

     private static final int MAX_HIDE_DURATION = 3000;
     private static final int MOVING_HIDE_DELAY = 300;

     private final Context mContext;
     private final ActionMode.Callback2 mCallback;
     private final MenuBuilder mMenu;
     private final Rect mContentRect;
     private final Rect mContentRectOnWindow;
     private final Rect mPreviousContentRectOnWindow;
     private final int[] mViewPosition;
     private final int[] mPreviousViewPosition;
     private final Rect mViewRect;
     private final Rect mPreviousViewRect;
     private final Rect mScreenRect;
     private final View mOriginatingView;
     private final int mBottomAllowance;

     private final Runnable mMovingOff = new Runnable() {
         public void run() {
             mFloatingToolbarVisibilityHelper.setMoving(false);
             mFloatingToolbarVisibilityHelper.updateToolbarVisibility();
         }
     };

     private final Runnable mHideOff = new Runnable() {
         public void run() {
             mFloatingToolbarVisibilityHelper.setHideRequested(false);
             mFloatingToolbarVisibilityHelper.updateToolbarVisibility();
         }
     };

     private FloatingToolbar mFloatingToolbar;
     private FloatingToolbarVisibilityHelper mFloatingToolbarVisibilityHelper;

     public FloatingActionMode(
             Context context, ActionMode.Callback2 callback, View originatingView) {
         mContext = Preconditions.checkNotNull(context);
         mCallback = Preconditions.checkNotNull(callback);
         mMenu = new MenuBuilder(context).setDefaultShowAsAction(
                 MenuItem.SHOW_AS_ACTION_IF_ROOM);
         setType(ActionMode.TYPE_FLOATING);
         mContentRect = new Rect();
         mContentRectOnWindow = new Rect();
         mPreviousContentRectOnWindow = new Rect();
         mViewPosition = new int[2];
         mPreviousViewPosition = new int[2];
         mViewRect = new Rect();
         mPreviousViewRect = new Rect();
         mScreenRect = new Rect();
         mOriginatingView = Preconditions.checkNotNull(originatingView);
         mOriginatingView.getLocationInWindow(mViewPosition);
         // Allow the content rect to overshoot a little bit beyond the
         // bottom view bound if necessary.
         mBottomAllowance = context.getResources()
                 .getDimensionPixelSize(R.dimen.content_rect_bottom_clip_allowance);
     }

     public void setFloatingToolbar(FloatingToolbar floatingToolbar) {
         mFloatingToolbar = floatingToolbar
                 .setMenu(mMenu)
                 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
                         @Override
                     public boolean onMenuItemClick(MenuItem item) {
                         return mCallback.onActionItemClicked(FloatingActionMode.this, item);
                     }
                 });
         mFloatingToolbarVisibilityHelper = new FloatingToolbarVisibilityHelper(mFloatingToolbar);
         mFloatingToolbarVisibilityHelper.activate();
     }

     @Override
     public void setTitle(CharSequence title) {}

     @Override
     public void setTitle(int resId) {}

     @Override
     public void setSubtitle(CharSequence subtitle) {}

     @Override
     public void setSubtitle(int resId) {}

     @Override
     public void setCustomView(View view) {}

     @Override
     public void invalidate() {
         checkToolbarInitialized();
         mCallback.onPrepareActionMode(this, mMenu);
         invalidateContentRect();  // Will re-layout and show the toolbar if necessary.
     }

     @Override
     public void invalidateContentRect() {
         checkToolbarInitialized();
         mCallback.onGetContentRect(this, mOriginatingView, mContentRect);
         repositionToolbar();
     }

     public void updateViewLocationInWindow() {
         checkToolbarInitialized();

         mOriginatingView.getLocationInWindow(mViewPosition);
         mOriginatingView.getGlobalVisibleRect(mViewRect);

         if (!Arrays.equals(mViewPosition, mPreviousViewPosition)
                 || !mViewRect.equals(mPreviousViewRect)) {
             repositionToolbar();
             mPreviousViewPosition[0] = mViewPosition[0];
             mPreviousViewPosition[1] = mViewPosition[1];
             mPreviousViewRect.set(mViewRect);
         }
     }

     private void repositionToolbar() {
         checkToolbarInitialized();

         mContentRectOnWindow.set(mContentRect);
         mContentRectOnWindow.offset(mViewPosition[0], mViewPosition[1]);

         if (isContentRectWithinBounds()) {
             mFloatingToolbarVisibilityHelper.setOutOfBounds(false);
             // Make sure that content rect is not out of the view's visible bounds.
             mContentRectOnWindow.set(
                     Math.max(mContentRectOnWindow.left, mViewRect.left),
                     Math.max(mContentRectOnWindow.top, mViewRect.top),
                     Math.min(mContentRectOnWindow.right, mViewRect.right),
                     Math.min(mContentRectOnWindow.bottom, mViewRect.bottom + mBottomAllowance));

             if (!mContentRectOnWindow.equals(mPreviousContentRectOnWindow)) {
                 // Content rect is moving.
                 mOriginatingView.removeCallbacks(mMovingOff);
                 mFloatingToolbarVisibilityHelper.setMoving(true);
                 mOriginatingView.postDelayed(mMovingOff, MOVING_HIDE_DELAY);

                 mFloatingToolbar.setContentRect(mContentRectOnWindow);
                 mFloatingToolbar.updateLayout();
             }
         } else {
             mFloatingToolbarVisibilityHelper.setOutOfBounds(true);
             mContentRectOnWindow.setEmpty();
         }
         mFloatingToolbarVisibilityHelper.updateToolbarVisibility();

         mPreviousContentRectOnWindow.set(mContentRectOnWindow);
     }

     private boolean isContentRectWithinBounds() {
         mScreenRect.set(
             0,
             0,
             mContext.getResources().getDisplayMetrics().widthPixels,
             mContext.getResources().getDisplayMetrics().heightPixels);

         return Rect.intersects(mContentRectOnWindow, mScreenRect)
             && Rect.intersects(mContentRectOnWindow, mViewRect);
     }

     @Override
     public void hide(long duration) {
         checkToolbarInitialized();

         if (duration == ActionMode.DEFAULT_HIDE_DURATION) {
             duration = ViewConfiguration.getDefaultActionModeHideDuration();
         }
         duration = Math.min(MAX_HIDE_DURATION, duration);
         mOriginatingView.removeCallbacks(mHideOff);
         if (duration <= 0) {
             mHideOff.run();
         } else {
             mFloatingToolbarVisibilityHelper.setHideRequested(true);
             mFloatingToolbarVisibilityHelper.updateToolbarVisibility();
             mOriginatingView.postDelayed(mHideOff, duration);
         }
     }

     @Override
     public void onWindowFocusChanged(boolean hasWindowFocus) {
         checkToolbarInitialized();
         mFloatingToolbarVisibilityHelper.setWindowFocused(hasWindowFocus);
         mFloatingToolbarVisibilityHelper.updateToolbarVisibility();
     }

     @Override
     public void finish() {
         checkToolbarInitialized();
         reset();
         mCallback.onDestroyActionMode(this);
     }

     @Override
     public Menu getMenu() {
         return mMenu;
     }

     @Override
     public CharSequence getTitle() {
         return null;
     }

     @Override
     public CharSequence getSubtitle() {
         return null;
     }

     @Override
     public View getCustomView() {
         return null;
     }

     @Override
     public MenuInflater getMenuInflater() {
         return new MenuInflater(mContext);
     }

     /**
      * @throws IllegalStateException
      */
     private void checkToolbarInitialized() {
         Preconditions.checkState(mFloatingToolbar != null);
         Preconditions.checkState(mFloatingToolbarVisibilityHelper != null);
     }

     private void reset() {
         mFloatingToolbar.dismiss();
         mFloatingToolbarVisibilityHelper.deactivate();
         mOriginatingView.removeCallbacks(mMovingOff);
         mOriginatingView.removeCallbacks(mHideOff);
     }


     /**
      * A helper for showing/hiding the floating toolbar depending on certain states.
      */
     private static final class FloatingToolbarVisibilityHelper {

         private final FloatingToolbar mToolbar;

         private boolean mHideRequested;
         private boolean mMoving;
         private boolean mOutOfBounds;
         private boolean mWindowFocused = true;

         private boolean mActive;

         public FloatingToolbarVisibilityHelper(FloatingToolbar toolbar) {
             mToolbar = Preconditions.checkNotNull(toolbar);
         }

         public void activate() {
             mHideRequested = false;
             mMoving = false;
             mOutOfBounds = false;
             mWindowFocused = true;

             mActive = true;
         }

         public void deactivate() {
             mActive = false;
             mToolbar.dismiss();
         }

         public void setHideRequested(boolean hide) {
             mHideRequested = hide;
         }

         public void setMoving(boolean moving) {
             mMoving = moving;
         }

         public void setOutOfBounds(boolean outOfBounds) {
             mOutOfBounds = outOfBounds;
         }

         public void setWindowFocused(boolean windowFocused) {
             mWindowFocused = windowFocused;
         }

         public void updateToolbarVisibility() {
             if (!mActive) {
                 return;
             }

             if (mHideRequested || mMoving || mOutOfBounds || !mWindowFocused) {
                 mToolbar.hide();
             } else {
                 mToolbar.show();
             }
         }
     }
 }
	/*
	* 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.internal.view;

	import android.content.Context;
	import android.graphics.Rect;
	import android.view.ActionMode;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.View;
	import android.view.ViewConfiguration;

	import com.android.internal.R;
	import com.android.internal.util.Preconditions;
	import com.android.internal.view.menu.MenuBuilder;
	import com.android.internal.widget.FloatingToolbar;

	import java.util.Arrays;

	public class FloatingActionMode extends ActionMode {

	private static final int MAX_HIDE_DURATION = 3000;
	private static final int MOVING_HIDE_DELAY = 300;

	private final Context mContext;
	private final ActionMode.Callback2 mCallback;
	private final MenuBuilder mMenu;
	private final Rect mContentRect;
	private final Rect mContentRectOnWindow;
	private final Rect mPreviousContentRectOnWindow;
	private final int[] mViewPosition;
	private final int[] mPreviousViewPosition;
	private final Rect mViewRect;
	private final Rect mPreviousViewRect;
	private final Rect mScreenRect;
	private final View mOriginatingView;
	private final int mBottomAllowance;

	private final Runnable mMovingOff = new Runnable() {
	public void run() {
	mFloatingToolbarVisibilityHelper.setMoving(false);
	mFloatingToolbarVisibilityHelper.updateToolbarVisibility();
	}
	};

	private final Runnable mHideOff = new Runnable() {
	public void run() {
	mFloatingToolbarVisibilityHelper.setHideRequested(false);
	mFloatingToolbarVisibilityHelper.updateToolbarVisibility();
	}
	};

	private FloatingToolbar mFloatingToolbar;
	private FloatingToolbarVisibilityHelper mFloatingToolbarVisibilityHelper;

	public FloatingActionMode(
	Context context, ActionMode.Callback2 callback, View originatingView) {
	mContext = Preconditions.checkNotNull(context);
	mCallback = Preconditions.checkNotNull(callback);
	mMenu = new MenuBuilder(context).setDefaultShowAsAction(
	MenuItem.SHOW_AS_ACTION_IF_ROOM);
	setType(ActionMode.TYPE_FLOATING);
	mContentRect = new Rect();
	mContentRectOnWindow = new Rect();
	mPreviousContentRectOnWindow = new Rect();
	mViewPosition = new int[2];
	mPreviousViewPosition = new int[2];
	mViewRect = new Rect();
	mPreviousViewRect = new Rect();
	mScreenRect = new Rect();
	mOriginatingView = Preconditions.checkNotNull(originatingView);
	mOriginatingView.getLocationInWindow(mViewPosition);
	// Allow the content rect to overshoot a little bit beyond the
	// bottom view bound if necessary.
	mBottomAllowance = context.getResources()
	.getDimensionPixelSize(R.dimen.content_rect_bottom_clip_allowance);
	}

	public void setFloatingToolbar(FloatingToolbar floatingToolbar) {
	mFloatingToolbar = floatingToolbar
	.setMenu(mMenu)
	.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
	@Override
	public boolean onMenuItemClick(MenuItem item) {
	return mCallback.onActionItemClicked(FloatingActionMode.this, item);
	}
	});
	mFloatingToolbarVisibilityHelper = new FloatingToolbarVisibilityHelper(mFloatingToolbar);
	mFloatingToolbarVisibilityHelper.activate();
	}

	@Override
	public void setTitle(CharSequence title) {}

	@Override
	public void setTitle(int resId) {}

	@Override
	public void setSubtitle(CharSequence subtitle) {}

	@Override
	public void setSubtitle(int resId) {}

	@Override
	public void setCustomView(View view) {}

	@Override
	public void invalidate() {
	checkToolbarInitialized();
	mCallback.onPrepareActionMode(this, mMenu);
	invalidateContentRect(); // Will re-layout and show the toolbar if necessary.
	}

	@Override
	public void invalidateContentRect() {
	checkToolbarInitialized();
	mCallback.onGetContentRect(this, mOriginatingView, mContentRect);
	repositionToolbar();
	}

	public void updateViewLocationInWindow() {
	checkToolbarInitialized();

	mOriginatingView.getLocationInWindow(mViewPosition);
	mOriginatingView.getGlobalVisibleRect(mViewRect);

	if (!Arrays.equals(mViewPosition, mPreviousViewPosition)
	\|\| !mViewRect.equals(mPreviousViewRect)) {
	repositionToolbar();
	mPreviousViewPosition[0] = mViewPosition[0];
	mPreviousViewPosition[1] = mViewPosition[1];
	mPreviousViewRect.set(mViewRect);
	}
	}

	private void repositionToolbar() {
	checkToolbarInitialized();

	mContentRectOnWindow.set(mContentRect);
	mContentRectOnWindow.offset(mViewPosition[0], mViewPosition[1]);

	if (isContentRectWithinBounds()) {
	mFloatingToolbarVisibilityHelper.setOutOfBounds(false);
	// Make sure that content rect is not out of the view's visible bounds.
	mContentRectOnWindow.set(
	Math.max(mContentRectOnWindow.left, mViewRect.left),
	Math.max(mContentRectOnWindow.top, mViewRect.top),
	Math.min(mContentRectOnWindow.right, mViewRect.right),
	Math.min(mContentRectOnWindow.bottom, mViewRect.bottom + mBottomAllowance));

	if (!mContentRectOnWindow.equals(mPreviousContentRectOnWindow)) {
	// Content rect is moving.
	mOriginatingView.removeCallbacks(mMovingOff);
	mFloatingToolbarVisibilityHelper.setMoving(true);
	mOriginatingView.postDelayed(mMovingOff, MOVING_HIDE_DELAY);

	mFloatingToolbar.setContentRect(mContentRectOnWindow);
	mFloatingToolbar.updateLayout();
	}
	} else {
	mFloatingToolbarVisibilityHelper.setOutOfBounds(true);
	mContentRectOnWindow.setEmpty();
	}
	mFloatingToolbarVisibilityHelper.updateToolbarVisibility();

	mPreviousContentRectOnWindow.set(mContentRectOnWindow);
	}

	private boolean isContentRectWithinBounds() {
	mScreenRect.set(
	0,
	0,
	mContext.getResources().getDisplayMetrics().widthPixels,
	mContext.getResources().getDisplayMetrics().heightPixels);

	return Rect.intersects(mContentRectOnWindow, mScreenRect)
	&& Rect.intersects(mContentRectOnWindow, mViewRect);
	}

	@Override
	public void hide(long duration) {
	checkToolbarInitialized();

	if (duration == ActionMode.DEFAULT_HIDE_DURATION) {
	duration = ViewConfiguration.getDefaultActionModeHideDuration();
	}
	duration = Math.min(MAX_HIDE_DURATION, duration);
	mOriginatingView.removeCallbacks(mHideOff);
	if (duration <= 0) {
	mHideOff.run();
	} else {
	mFloatingToolbarVisibilityHelper.setHideRequested(true);
	mFloatingToolbarVisibilityHelper.updateToolbarVisibility();
	mOriginatingView.postDelayed(mHideOff, duration);
	}
	}

	@Override
	public void onWindowFocusChanged(boolean hasWindowFocus) {
	checkToolbarInitialized();
	mFloatingToolbarVisibilityHelper.setWindowFocused(hasWindowFocus);
	mFloatingToolbarVisibilityHelper.updateToolbarVisibility();
	}

	@Override
	public void finish() {
	checkToolbarInitialized();
	reset();
	mCallback.onDestroyActionMode(this);
	}

	@Override
	public Menu getMenu() {
	return mMenu;
	}

	@Override
	public CharSequence getTitle() {
	return null;
	}

	@Override
	public CharSequence getSubtitle() {
	return null;
	}

	@Override
	public View getCustomView() {
	return null;
	}

	@Override
	public MenuInflater getMenuInflater() {
	return new MenuInflater(mContext);
	}

	/**
	* @throws IllegalStateException
	*/
	private void checkToolbarInitialized() {
	Preconditions.checkState(mFloatingToolbar != null);
	Preconditions.checkState(mFloatingToolbarVisibilityHelper != null);
	}

	private void reset() {
	mFloatingToolbar.dismiss();
	mFloatingToolbarVisibilityHelper.deactivate();
	mOriginatingView.removeCallbacks(mMovingOff);
	mOriginatingView.removeCallbacks(mHideOff);
	}


	/**
	* A helper for showing/hiding the floating toolbar depending on certain states.
	*/
	private static final class FloatingToolbarVisibilityHelper {

	private final FloatingToolbar mToolbar;

	private boolean mHideRequested;
	private boolean mMoving;
	private boolean mOutOfBounds;
	private boolean mWindowFocused = true;

	private boolean mActive;

	public FloatingToolbarVisibilityHelper(FloatingToolbar toolbar) {
	mToolbar = Preconditions.checkNotNull(toolbar);
	}

	public void activate() {
	mHideRequested = false;
	mMoving = false;
	mOutOfBounds = false;
	mWindowFocused = true;

	mActive = true;
	}

	public void deactivate() {
	mActive = false;
	mToolbar.dismiss();
	}

	public void setHideRequested(boolean hide) {
	mHideRequested = hide;
	}

	public void setMoving(boolean moving) {
	mMoving = moving;
	}

	public void setOutOfBounds(boolean outOfBounds) {
	mOutOfBounds = outOfBounds;
	}

	public void setWindowFocused(boolean windowFocused) {
	mWindowFocused = windowFocused;
	}

	public void updateToolbarVisibility() {
	if (!mActive) {
	return;
	}

	if (mHideRequested \|\| mMoving \|\| mOutOfBounds \|\| !mWindowFocused) {
	mToolbar.hide();
	} else {
	mToolbar.show();
	}
	}
	}
	}