src/com/android/messaging/ui/AttachmentPreview.java - platform/packages/apps/Messaging - 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.messaging.ui;

 import android.animation.Animator;
 import android.animation.ObjectAnimator;
 import android.content.Context;
 import android.graphics.Rect;
 import android.os.Handler;
 import android.os.Looper;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.FrameLayout;
 import android.widget.ImageButton;
 import android.widget.ScrollView;

 import com.android.messaging.R;
 import com.android.messaging.annotation.VisibleForAnimation;
 import com.android.messaging.datamodel.data.DraftMessageData;
 import com.android.messaging.datamodel.data.MediaPickerMessagePartData;
 import com.android.messaging.datamodel.data.MessagePartData;
 import com.android.messaging.datamodel.data.PendingAttachmentData;
 import com.android.messaging.ui.MultiAttachmentLayout.OnAttachmentClickListener;
 import com.android.messaging.ui.animation.PopupTransitionAnimation;
 import com.android.messaging.ui.conversation.ComposeMessageView;
 import com.android.messaging.ui.conversation.ConversationFragment;
 import com.android.messaging.util.Assert;
 import com.android.messaging.util.ThreadUtil;
 import com.android.messaging.util.UiUtils;

 import java.util.ArrayList;
 import java.util.List;

 public class AttachmentPreview extends ScrollView implements OnAttachmentClickListener {
     private FrameLayout mAttachmentView;
     private ComposeMessageView mComposeMessageView;
     private ImageButton mCloseButton;
     private int mAnimatedHeight = -1;
     private Animator mCloseGapAnimator;
     private boolean mPendingFirstUpdate;
     private Handler mHandler;
     private Runnable mHideRunnable;
     private boolean mPendingHideCanceled;

     private static final int CLOSE_BUTTON_REVEAL_STAGGER_MILLIS = 300;

     public AttachmentPreview(final Context context, final AttributeSet attrs) {
         super(context, attrs);
         mHandler = new Handler(Looper.getMainLooper());
     }

     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
         mCloseButton = (ImageButton) findViewById(R.id.close_button);
         mCloseButton.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(final View view) {
                 mComposeMessageView.clearAttachments();
             }
         });

         mAttachmentView = (FrameLayout) findViewById(R.id.attachment_view);

         // The attachment preview is a scroll view so that it can show the bottom portion of the
         // attachment whenever the space is tight (e.g. when in landscape mode). Per design
         // request we'd like to make the attachment view always scrolled to the bottom.
         addOnLayoutChangeListener(new OnLayoutChangeListener() {
             @Override
             public void onLayoutChange(final View v, final int left, final int top, final int right,
                     final int bottom, final int oldLeft, final int oldTop, final int oldRight,
                     final int oldBottom) {
                 post(new Runnable() {
                     @Override
                     public void run() {
                         final int childCount = getChildCount();
                         if (childCount > 0) {
                             final View lastChild = getChildAt(childCount - 1);
                             scrollTo(getScrollX(), lastChild.getBottom() - getHeight());
                         }
                     }
                 });
             }
         });
         mPendingFirstUpdate = true;
     }

     public void setComposeMessageView(final ComposeMessageView composeMessageView) {
         mComposeMessageView = composeMessageView;
     }

     @Override
     protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
         if (mAnimatedHeight >= 0) {
             setMeasuredDimension(getMeasuredWidth(), mAnimatedHeight);
         }
     }

     private void cancelPendingHide() {
         mPendingHideCanceled = true;
     }

     public void hideAttachmentPreview() {
         if (getVisibility() != GONE) {
             UiUtils.revealOrHideViewWithAnimation(mCloseButton, GONE,
                     null /* onFinishRunnable */);
             startCloseGapAnimationOnAttachmentClear();

             if (mAttachmentView.getChildCount() > 0) {
                 mPendingHideCanceled = false;
                 final View viewToHide = mAttachmentView.getChildCount() > 1 ?
                         mAttachmentView : mAttachmentView.getChildAt(0);
                 UiUtils.revealOrHideViewWithAnimation(viewToHide, INVISIBLE,
                         new Runnable() {
                             @Override
                             public void run() {
                                 // Only hide if we are didn't get overruled by showing
                                 if (!mPendingHideCanceled) {
                                     mAttachmentView.removeAllViews();
                                     setVisibility(GONE);
                                 }
                             }
                         });
             } else {
                 mAttachmentView.removeAllViews();
                 setVisibility(GONE);
             }
         }
     }

     // returns true if we have attachments
     public boolean onAttachmentsChanged(final DraftMessageData draftMessageData) {
         final boolean isFirstUpdate = mPendingFirstUpdate;
         final List<MessagePartData> attachments = draftMessageData.getReadOnlyAttachments();
         final List<PendingAttachmentData> pendingAttachments =
                 draftMessageData.getReadOnlyPendingAttachments();

         // Any change in attachments would invalidate the animated height animation.
         cancelCloseGapAnimation();
         mPendingFirstUpdate = false;

         final int combinedAttachmentCount = attachments.size() + pendingAttachments.size();
         mCloseButton.setContentDescription(getResources()
                 .getQuantityString(R.plurals.attachment_preview_close_content_description,
                         combinedAttachmentCount));
         if (combinedAttachmentCount == 0) {
             mHideRunnable = new Runnable() {
                 @Override
                 public void run() {
                     mHideRunnable = null;
                     // Only start the hiding if there are still no attachments
                     if (attachments.size() + pendingAttachments.size() == 0) {
                         hideAttachmentPreview();
                     }
                 }
             };
             if (draftMessageData.isSending()) {
                 // Wait to hide until the message is ready to start animating
                 // We'll execute immediately when the animation triggers
                 mHandler.postDelayed(mHideRunnable,
                         ConversationFragment.MESSAGE_ANIMATION_MAX_WAIT);
             } else {
                 // Run immediately when clearing attachments
                 mHideRunnable.run();
             }
             return false;
         }

         cancelPendingHide();  // We're showing
         if (getVisibility() != VISIBLE) {
             setVisibility(VISIBLE);
             mAttachmentView.setVisibility(VISIBLE);

             // Don't animate in the close button if this is the first update after view creation.
             // This is the initial draft load from database for pre-existing drafts.
             if (!isFirstUpdate) {
                 // Reveal the close button after the view animates in.
                 mCloseButton.setVisibility(INVISIBLE);
                 ThreadUtil.getMainThreadHandler().postDelayed(new Runnable() {
                     @Override
                     public void run() {
                         UiUtils.revealOrHideViewWithAnimation(mCloseButton, VISIBLE,
                                 null /* onFinishRunnable */);
                     }
                 }, UiUtils.MEDIAPICKER_TRANSITION_DURATION + CLOSE_BUTTON_REVEAL_STAGGER_MILLIS);
             }
         }

         // Merge the pending attachment list with real attachment.  Design would prefer these be
         // in LIFO order user can see added images past the 5th one but we also want them to be in
         // order and we want it to be WYSIWYG.
         final List<MessagePartData> combinedAttachments = new ArrayList<>();
         combinedAttachments.addAll(attachments);
         combinedAttachments.addAll(pendingAttachments);

         final LayoutInflater layoutInflater = LayoutInflater.from(getContext());
         if (combinedAttachmentCount > 1) {
             MultiAttachmentLayout multiAttachmentLayout = null;
             Rect transitionRect = null;
             if (mAttachmentView.getChildCount() > 0) {
                 final View firstChild = mAttachmentView.getChildAt(0);
                 if (firstChild instanceof MultiAttachmentLayout) {
                     Assert.equals(1, mAttachmentView.getChildCount());
                     multiAttachmentLayout = (MultiAttachmentLayout) firstChild;
                     multiAttachmentLayout.bindAttachments(combinedAttachments,
                             null /* transitionRect */, combinedAttachmentCount);
                 } else {
                     transitionRect = new Rect(firstChild.getLeft(), firstChild.getTop(),
                             firstChild.getRight(), firstChild.getBottom());
                 }
             }
             if (multiAttachmentLayout == null) {
                 multiAttachmentLayout = AttachmentPreviewFactory.createMultiplePreview(
                         getContext(), this);
                 multiAttachmentLayout.bindAttachments(combinedAttachments, transitionRect,
                         combinedAttachmentCount);
                 mAttachmentView.removeAllViews();
                 mAttachmentView.addView(multiAttachmentLayout);
             }
         } else {
             final MessagePartData attachment = combinedAttachments.get(0);
             boolean shouldAnimate = true;
             if (mAttachmentView.getChildCount() > 0) {
                 // If we are going from N->1 attachments, try to use the current bounds
                 // bounds as the starting rect.
                 shouldAnimate = false;
                 final View firstChild = mAttachmentView.getChildAt(0);
                 if (firstChild instanceof MultiAttachmentLayout &&
                         attachment instanceof MediaPickerMessagePartData) {
                     final View leftoverView = ((MultiAttachmentLayout) firstChild)
                             .findViewForAttachment(attachment);
                     if (leftoverView != null) {
                         final Rect currentRect = UiUtils.getMeasuredBoundsOnScreen(leftoverView);
                         if (!currentRect.isEmpty() &&
                                 attachment instanceof MediaPickerMessagePartData) {
                             ((MediaPickerMessagePartData) attachment).setStartRect(currentRect);
                             shouldAnimate = true;
                         }
                     }
                 }
             }
             mAttachmentView.removeAllViews();
             final View attachmentView = AttachmentPreviewFactory.createAttachmentPreview(
                     layoutInflater, attachment, mAttachmentView,
                     AttachmentPreviewFactory.TYPE_SINGLE, true /* startImageRequest */, this);
             if (attachmentView != null) {
                 mAttachmentView.addView(attachmentView);
                 if (shouldAnimate) {
                     tryAnimateViewIn(attachment, attachmentView);
                 }
             }
         }
         return true;
     }

     public void onMessageAnimationStart() {
         if (mHideRunnable == null) {
             return;
         }

         // Run the hide animation at the same time as the message animation
         mHandler.removeCallbacks(mHideRunnable);
         setVisibility(View.INVISIBLE);
         mHideRunnable.run();
     }

     static void tryAnimateViewIn(final MessagePartData attachmentData, final View view) {
         if (attachmentData instanceof MediaPickerMessagePartData) {
             final Rect startRect = ((MediaPickerMessagePartData) attachmentData).getStartRect();
             new PopupTransitionAnimation(startRect, view).startAfterLayoutComplete();
         }
     }

     @VisibleForAnimation
     public void setAnimatedHeight(final int animatedHeight) {
         if (mAnimatedHeight != animatedHeight) {
             mAnimatedHeight = animatedHeight;
             requestLayout();
         }
     }

     /**
      * Kicks off an animation to animate the layout change for closing the gap between the
      * message list and the compose message box when the attachments are cleared.
      */
     private void startCloseGapAnimationOnAttachmentClear() {
         // Cancel existing animation.
         cancelCloseGapAnimation();
         mCloseGapAnimator = ObjectAnimator.ofInt(this, "animatedHeight", getHeight(), 0);
         mCloseGapAnimator.start();
     }

     private void cancelCloseGapAnimation() {
         if (mCloseGapAnimator != null) {
             mCloseGapAnimator.cancel();
             mCloseGapAnimator = null;
         }
         mAnimatedHeight = -1;
     }

     @Override
     public boolean onAttachmentClick(final MessagePartData attachment,
             final Rect viewBoundsOnScreen, final boolean longPress) {
         if (longPress) {
             mComposeMessageView.onAttachmentPreviewLongClicked();
             return true;
         }

         if (!(attachment instanceof PendingAttachmentData) && attachment.isImage()) {
             mComposeMessageView.displayPhoto(attachment.getContentUri(), viewBoundsOnScreen);
             return true;
         }
         return false;
     }
 }
	/*
	* 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.messaging.ui;

	import android.animation.Animator;
	import android.animation.ObjectAnimator;
	import android.content.Context;
	import android.graphics.Rect;
	import android.os.Handler;
	import android.os.Looper;
	import android.util.AttributeSet;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.widget.FrameLayout;
	import android.widget.ImageButton;
	import android.widget.ScrollView;

	import com.android.messaging.R;
	import com.android.messaging.annotation.VisibleForAnimation;
	import com.android.messaging.datamodel.data.DraftMessageData;
	import com.android.messaging.datamodel.data.MediaPickerMessagePartData;
	import com.android.messaging.datamodel.data.MessagePartData;
	import com.android.messaging.datamodel.data.PendingAttachmentData;
	import com.android.messaging.ui.MultiAttachmentLayout.OnAttachmentClickListener;
	import com.android.messaging.ui.animation.PopupTransitionAnimation;
	import com.android.messaging.ui.conversation.ComposeMessageView;
	import com.android.messaging.ui.conversation.ConversationFragment;
	import com.android.messaging.util.Assert;
	import com.android.messaging.util.ThreadUtil;
	import com.android.messaging.util.UiUtils;

	import java.util.ArrayList;
	import java.util.List;

	public class AttachmentPreview extends ScrollView implements OnAttachmentClickListener {
	private FrameLayout mAttachmentView;
	private ComposeMessageView mComposeMessageView;
	private ImageButton mCloseButton;
	private int mAnimatedHeight = -1;
	private Animator mCloseGapAnimator;
	private boolean mPendingFirstUpdate;
	private Handler mHandler;
	private Runnable mHideRunnable;
	private boolean mPendingHideCanceled;

	private static final int CLOSE_BUTTON_REVEAL_STAGGER_MILLIS = 300;

	public AttachmentPreview(final Context context, final AttributeSet attrs) {
	super(context, attrs);
	mHandler = new Handler(Looper.getMainLooper());
	}

	@Override
	protected void onFinishInflate() {
	super.onFinishInflate();
	mCloseButton = (ImageButton) findViewById(R.id.close_button);
	mCloseButton.setOnClickListener(new OnClickListener() {
	@Override
	public void onClick(final View view) {
	mComposeMessageView.clearAttachments();
	}
	});

	mAttachmentView = (FrameLayout) findViewById(R.id.attachment_view);

	// The attachment preview is a scroll view so that it can show the bottom portion of the
	// attachment whenever the space is tight (e.g. when in landscape mode). Per design
	// request we'd like to make the attachment view always scrolled to the bottom.
	addOnLayoutChangeListener(new OnLayoutChangeListener() {
	@Override
	public void onLayoutChange(final View v, final int left, final int top, final int right,
	final int bottom, final int oldLeft, final int oldTop, final int oldRight,
	final int oldBottom) {
	post(new Runnable() {
	@Override
	public void run() {
	final int childCount = getChildCount();
	if (childCount > 0) {
	final View lastChild = getChildAt(childCount - 1);
	scrollTo(getScrollX(), lastChild.getBottom() - getHeight());
	}
	}
	});
	}
	});
	mPendingFirstUpdate = true;
	}

	public void setComposeMessageView(final ComposeMessageView composeMessageView) {
	mComposeMessageView = composeMessageView;
	}

	@Override
	protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
	super.onMeasure(widthMeasureSpec, heightMeasureSpec);
	if (mAnimatedHeight >= 0) {
	setMeasuredDimension(getMeasuredWidth(), mAnimatedHeight);
	}
	}

	private void cancelPendingHide() {
	mPendingHideCanceled = true;
	}

	public void hideAttachmentPreview() {
	if (getVisibility() != GONE) {
	UiUtils.revealOrHideViewWithAnimation(mCloseButton, GONE,
	null /* onFinishRunnable */);
	startCloseGapAnimationOnAttachmentClear();

	if (mAttachmentView.getChildCount() > 0) {
	mPendingHideCanceled = false;
	final View viewToHide = mAttachmentView.getChildCount() > 1 ?
	mAttachmentView : mAttachmentView.getChildAt(0);
	UiUtils.revealOrHideViewWithAnimation(viewToHide, INVISIBLE,
	new Runnable() {
	@Override
	public void run() {
	// Only hide if we are didn't get overruled by showing
	if (!mPendingHideCanceled) {
	mAttachmentView.removeAllViews();
	setVisibility(GONE);
	}
	}
	});
	} else {
	mAttachmentView.removeAllViews();
	setVisibility(GONE);
	}
	}
	}

	// returns true if we have attachments
	public boolean onAttachmentsChanged(final DraftMessageData draftMessageData) {
	final boolean isFirstUpdate = mPendingFirstUpdate;
	final List<MessagePartData> attachments = draftMessageData.getReadOnlyAttachments();
	final List<PendingAttachmentData> pendingAttachments =
	draftMessageData.getReadOnlyPendingAttachments();

	// Any change in attachments would invalidate the animated height animation.
	cancelCloseGapAnimation();
	mPendingFirstUpdate = false;

	final int combinedAttachmentCount = attachments.size() + pendingAttachments.size();
	mCloseButton.setContentDescription(getResources()
	.getQuantityString(R.plurals.attachment_preview_close_content_description,
	combinedAttachmentCount));
	if (combinedAttachmentCount == 0) {
	mHideRunnable = new Runnable() {
	@Override
	public void run() {
	mHideRunnable = null;
	// Only start the hiding if there are still no attachments
	if (attachments.size() + pendingAttachments.size() == 0) {
	hideAttachmentPreview();
	}
	}
	};
	if (draftMessageData.isSending()) {
	// Wait to hide until the message is ready to start animating
	// We'll execute immediately when the animation triggers
	mHandler.postDelayed(mHideRunnable,
	ConversationFragment.MESSAGE_ANIMATION_MAX_WAIT);
	} else {
	// Run immediately when clearing attachments
	mHideRunnable.run();
	}
	return false;
	}

	cancelPendingHide(); // We're showing
	if (getVisibility() != VISIBLE) {
	setVisibility(VISIBLE);
	mAttachmentView.setVisibility(VISIBLE);

	// Don't animate in the close button if this is the first update after view creation.
	// This is the initial draft load from database for pre-existing drafts.
	if (!isFirstUpdate) {
	// Reveal the close button after the view animates in.
	mCloseButton.setVisibility(INVISIBLE);
	ThreadUtil.getMainThreadHandler().postDelayed(new Runnable() {
	@Override
	public void run() {
	UiUtils.revealOrHideViewWithAnimation(mCloseButton, VISIBLE,
	null /* onFinishRunnable */);
	}
	}, UiUtils.MEDIAPICKER_TRANSITION_DURATION + CLOSE_BUTTON_REVEAL_STAGGER_MILLIS);
	}
	}

	// Merge the pending attachment list with real attachment. Design would prefer these be
	// in LIFO order user can see added images past the 5th one but we also want them to be in
	// order and we want it to be WYSIWYG.
	final List<MessagePartData> combinedAttachments = new ArrayList<>();
	combinedAttachments.addAll(attachments);
	combinedAttachments.addAll(pendingAttachments);

	final LayoutInflater layoutInflater = LayoutInflater.from(getContext());
	if (combinedAttachmentCount > 1) {
	MultiAttachmentLayout multiAttachmentLayout = null;
	Rect transitionRect = null;
	if (mAttachmentView.getChildCount() > 0) {
	final View firstChild = mAttachmentView.getChildAt(0);
	if (firstChild instanceof MultiAttachmentLayout) {
	Assert.equals(1, mAttachmentView.getChildCount());
	multiAttachmentLayout = (MultiAttachmentLayout) firstChild;
	multiAttachmentLayout.bindAttachments(combinedAttachments,
	null /* transitionRect */, combinedAttachmentCount);
	} else {
	transitionRect = new Rect(firstChild.getLeft(), firstChild.getTop(),
	firstChild.getRight(), firstChild.getBottom());
	}
	}
	if (multiAttachmentLayout == null) {
	multiAttachmentLayout = AttachmentPreviewFactory.createMultiplePreview(
	getContext(), this);
	multiAttachmentLayout.bindAttachments(combinedAttachments, transitionRect,
	combinedAttachmentCount);
	mAttachmentView.removeAllViews();
	mAttachmentView.addView(multiAttachmentLayout);
	}
	} else {
	final MessagePartData attachment = combinedAttachments.get(0);
	boolean shouldAnimate = true;
	if (mAttachmentView.getChildCount() > 0) {
	// If we are going from N->1 attachments, try to use the current bounds
	// bounds as the starting rect.
	shouldAnimate = false;
	final View firstChild = mAttachmentView.getChildAt(0);
	if (firstChild instanceof MultiAttachmentLayout &&
	attachment instanceof MediaPickerMessagePartData) {
	final View leftoverView = ((MultiAttachmentLayout) firstChild)
	.findViewForAttachment(attachment);
	if (leftoverView != null) {
	final Rect currentRect = UiUtils.getMeasuredBoundsOnScreen(leftoverView);
	if (!currentRect.isEmpty() &&
	attachment instanceof MediaPickerMessagePartData) {
	((MediaPickerMessagePartData) attachment).setStartRect(currentRect);
	shouldAnimate = true;
	}
	}
	}
	}
	mAttachmentView.removeAllViews();
	final View attachmentView = AttachmentPreviewFactory.createAttachmentPreview(
	layoutInflater, attachment, mAttachmentView,
	AttachmentPreviewFactory.TYPE_SINGLE, true /* startImageRequest */, this);
	if (attachmentView != null) {
	mAttachmentView.addView(attachmentView);
	if (shouldAnimate) {
	tryAnimateViewIn(attachment, attachmentView);
	}
	}
	}
	return true;
	}

	public void onMessageAnimationStart() {
	if (mHideRunnable == null) {
	return;
	}

	// Run the hide animation at the same time as the message animation
	mHandler.removeCallbacks(mHideRunnable);
	setVisibility(View.INVISIBLE);
	mHideRunnable.run();
	}

	static void tryAnimateViewIn(final MessagePartData attachmentData, final View view) {
	if (attachmentData instanceof MediaPickerMessagePartData) {
	final Rect startRect = ((MediaPickerMessagePartData) attachmentData).getStartRect();
	new PopupTransitionAnimation(startRect, view).startAfterLayoutComplete();
	}
	}

	@VisibleForAnimation
	public void setAnimatedHeight(final int animatedHeight) {
	if (mAnimatedHeight != animatedHeight) {
	mAnimatedHeight = animatedHeight;
	requestLayout();
	}
	}

	/**
	* Kicks off an animation to animate the layout change for closing the gap between the
	* message list and the compose message box when the attachments are cleared.
	*/
	private void startCloseGapAnimationOnAttachmentClear() {
	// Cancel existing animation.
	cancelCloseGapAnimation();
	mCloseGapAnimator = ObjectAnimator.ofInt(this, "animatedHeight", getHeight(), 0);
	mCloseGapAnimator.start();
	}

	private void cancelCloseGapAnimation() {
	if (mCloseGapAnimator != null) {
	mCloseGapAnimator.cancel();
	mCloseGapAnimator = null;
	}
	mAnimatedHeight = -1;
	}

	@Override
	public boolean onAttachmentClick(final MessagePartData attachment,
	final Rect viewBoundsOnScreen, final boolean longPress) {
	if (longPress) {
	mComposeMessageView.onAttachmentPreviewLongClicked();
	return true;
	}

	if (!(attachment instanceof PendingAttachmentData) && attachment.isImage()) {
	mComposeMessageView.displayPhoto(attachment.getContentUri(), viewBoundsOnScreen);
	return true;
	}
	return false;
	}
	}