michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.home;
michael@0: 
michael@0: import org.json.JSONException;
michael@0: import org.json.JSONObject;
michael@0: import org.mozilla.gecko.GeckoAppShell;
michael@0: import org.mozilla.gecko.GeckoEvent;
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.animation.PropertyAnimator;
michael@0: import org.mozilla.gecko.animation.PropertyAnimator.Property;
michael@0: import org.mozilla.gecko.animation.ViewHelper;
michael@0: import org.mozilla.gecko.gfx.BitmapUtils;
michael@0: import org.mozilla.gecko.util.GeckoEventListener;
michael@0: import org.mozilla.gecko.util.ThreadUtils;
michael@0: import org.mozilla.gecko.widget.EllipsisTextView;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.graphics.drawable.Drawable;
michael@0: import android.os.Build;
michael@0: import android.text.Html;
michael@0: import android.text.Spanned;
michael@0: import android.text.TextUtils;
michael@0: import android.util.AttributeSet;
michael@0: import android.util.Log;
michael@0: import android.view.LayoutInflater;
michael@0: import android.view.MotionEvent;
michael@0: import android.view.View;
michael@0: import android.widget.ImageButton;
michael@0: import android.widget.ImageView;
michael@0: import android.widget.LinearLayout;
michael@0: import android.widget.TextView;
michael@0: 
michael@0: public class HomeBanner extends LinearLayout
michael@0:                         implements GeckoEventListener {
michael@0:     private static final String LOGTAG = "GeckoHomeBanner";
michael@0: 
michael@0:     // Used for tracking scroll length
michael@0:     private float mTouchY = -1;
michael@0: 
michael@0:     // Used to detect for upwards scroll to push banner all the way up
michael@0:     private boolean mSnapBannerToTop;
michael@0: 
michael@0:     // Tracks whether or not the banner should be shown on the current panel.
michael@0:     private boolean mActive = false;
michael@0: 
michael@0:     // The user is currently swiping between HomePager pages
michael@0:     private boolean mScrollingPages = false;
michael@0: 
michael@0:     // Tracks whether the user swiped the banner down, preventing us from autoshowing when the user
michael@0:     // switches back to the default page.
michael@0:     private boolean mUserSwipedDown = false;
michael@0: 
michael@0:     // We must use this custom TextView to address an issue on 2.3 and lower where ellipsized text
michael@0:     // will not wrap more than 2 lines.
michael@0:     private final EllipsisTextView mTextView;
michael@0:     private final ImageView mIconView;
michael@0: 
michael@0:     // The height of the banner view.
michael@0:     private final float mHeight;
michael@0: 
michael@0:     // Listener that gets called when the banner is dismissed from the close button.
michael@0:     private OnDismissListener mOnDismissListener;
michael@0: 
michael@0:     public interface OnDismissListener {
michael@0:         public void onDismiss();
michael@0:     }
michael@0: 
michael@0:     public HomeBanner(Context context) {
michael@0:         this(context, null);
michael@0:     }
michael@0: 
michael@0:     public HomeBanner(Context context, AttributeSet attrs) {
michael@0:         super(context, attrs);
michael@0: 
michael@0:         LayoutInflater.from(context).inflate(R.layout.home_banner_content, this);
michael@0: 
michael@0:         mTextView = (EllipsisTextView) findViewById(R.id.text);
michael@0:         mIconView = (ImageView) findViewById(R.id.icon);
michael@0: 
michael@0:         mHeight = getResources().getDimensionPixelSize(R.dimen.home_banner_height);
michael@0: 
michael@0:         // Disable the banner until a message is set.
michael@0:         setEnabled(false);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onAttachedToWindow() {
michael@0:         super.onAttachedToWindow();
michael@0: 
michael@0:         // Tapping on the close button will ensure that the banner is never
michael@0:         // showed again on this session.
michael@0:         final ImageButton closeButton = (ImageButton) findViewById(R.id.close);
michael@0: 
michael@0:         // The drawable should have 50% opacity.
michael@0:         closeButton.getDrawable().setAlpha(127);
michael@0: 
michael@0:         closeButton.setOnClickListener(new View.OnClickListener() {
michael@0:             @Override
michael@0:             public void onClick(View view) {
michael@0:                 HomeBanner.this.dismiss();
michael@0: 
michael@0:                 // Send the current message id back to JS.
michael@0:                 GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("HomeBanner:Dismiss", (String) getTag()));
michael@0:             }
michael@0:         });
michael@0: 
michael@0:         setOnClickListener(new View.OnClickListener() {
michael@0:             @Override
michael@0:             public void onClick(View v) {
michael@0:                 HomeBanner.this.dismiss();
michael@0: 
michael@0:                 // Send the current message id back to JS.
michael@0:                 GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("HomeBanner:Click", (String) getTag()));
michael@0:             }
michael@0:         });
michael@0: 
michael@0:         GeckoAppShell.getEventDispatcher().registerEventListener("HomeBanner:Data", this);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onDetachedFromWindow() {
michael@0:         super.onDetachedFromWindow();
michael@0: 
michael@0:         GeckoAppShell.getEventDispatcher().unregisterEventListener("HomeBanner:Data", this);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void setVisibility(int visibility) {
michael@0:         // On pre-Honeycomb devices, setting the visibility to GONE won't actually
michael@0:         // hide the view unless we clear animations first.
michael@0:         if (Build.VERSION.SDK_INT < 11 && visibility == View.GONE) {
michael@0:             clearAnimation();
michael@0:         }
michael@0: 
michael@0:         super.setVisibility(visibility);
michael@0:     }
michael@0: 
michael@0:     public void setScrollingPages(boolean scrollingPages) {
michael@0:         mScrollingPages = scrollingPages;
michael@0:     }
michael@0: 
michael@0:     public void setOnDismissListener(OnDismissListener listener) {
michael@0:         mOnDismissListener = listener;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Hides and disables the banner.
michael@0:      */
michael@0:     private void dismiss() {
michael@0:         setVisibility(View.GONE);
michael@0:         setEnabled(false);
michael@0: 
michael@0:         if (mOnDismissListener != null) {
michael@0:             mOnDismissListener.onDismiss();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Sends a message to gecko to request a new banner message. UI is updated in handleMessage.
michael@0:      */
michael@0:     public void update() {
michael@0:         GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("HomeBanner:Get", null));
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void handleMessage(String event, JSONObject message) {
michael@0:         final String id = message.optString("id");
michael@0:         final String text = message.optString("text");
michael@0:         final String iconURI = message.optString("iconURI");
michael@0: 
michael@0:         // Don't update the banner if the message doesn't have valid id and text.
michael@0:         if (TextUtils.isEmpty(id) || TextUtils.isEmpty(text)) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         // Update the banner message on the UI thread.
michael@0:         ThreadUtils.postToUiThread(new Runnable() {
michael@0:             @Override
michael@0:             public void run() {
michael@0:                 // Store the current message id to pass back to JS in the view's OnClickListener.
michael@0:                 setTag(id);
michael@0:                 mTextView.setOriginalText(Html.fromHtml(text));
michael@0: 
michael@0:                 BitmapUtils.getDrawable(getContext(), iconURI, new BitmapUtils.BitmapLoader() {
michael@0:                     @Override
michael@0:                     public void onBitmapFound(final Drawable d) {
michael@0:                         // Hide the image view if we don't have an icon to show.
michael@0:                         if (d == null) {
michael@0:                             mIconView.setVisibility(View.GONE);
michael@0:                         } else {
michael@0:                             mIconView.setImageDrawable(d);
michael@0:                         }
michael@0:                     }
michael@0:                 });
michael@0: 
michael@0:                 GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("HomeBanner:Shown", id));
michael@0: 
michael@0:                 // Enable the banner after a message is set.
michael@0:                 setEnabled(true);
michael@0: 
michael@0:                 // Animate the banner if it is currently active.
michael@0:                 if (mActive) {
michael@0:                     animateUp();
michael@0:                 }
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: 
michael@0:     public void setActive(boolean active) {
michael@0:         // No need to animate if not changing
michael@0:         if (mActive == active) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         mActive = active;
michael@0: 
michael@0:         // Don't animate if the banner isn't enabled.
michael@0:         if (!isEnabled()) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         if (active) {
michael@0:             animateUp();
michael@0:         } else {
michael@0:             animateDown();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private void ensureVisible() {
michael@0:         // The banner visibility is set to GONE after it is animated off screen,
michael@0:         // so we need to make it visible again.
michael@0:         if (getVisibility() == View.GONE) {
michael@0:             // Translate the banner off screen before setting it to VISIBLE.
michael@0:             ViewHelper.setTranslationY(this, mHeight);
michael@0:             setVisibility(View.VISIBLE);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private void animateUp() {
michael@0:         // Don't try to animate if the user swiped the banner down previously to hide it.
michael@0:         if (mUserSwipedDown) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         ensureVisible();
michael@0: 
michael@0:         final PropertyAnimator animator = new PropertyAnimator(100);
michael@0:         animator.attach(this, Property.TRANSLATION_Y, 0);
michael@0:         animator.start();
michael@0:     }
michael@0: 
michael@0:     private void animateDown() {
michael@0:         if (ViewHelper.getTranslationY(this) == mHeight) {
michael@0:             // Hide the banner to avoid intercepting clicks on pre-honeycomb devices.
michael@0:             setVisibility(View.GONE);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         final PropertyAnimator animator = new PropertyAnimator(100);
michael@0:         animator.attach(this, Property.TRANSLATION_Y, mHeight);
michael@0:         animator.addPropertyAnimationListener(new PropertyAnimator.PropertyAnimationListener() {
michael@0:             @Override
michael@0:             public void onPropertyAnimationStart() {
michael@0:             }
michael@0: 
michael@0:             @Override
michael@0:             public void onPropertyAnimationEnd() {
michael@0:                 // Hide the banner to avoid intercepting clicks on pre-honeycomb devices.
michael@0:                 setVisibility(View.GONE);
michael@0:             }
michael@0:         });
michael@0:         animator.start();
michael@0:     }
michael@0: 
michael@0:     public void handleHomeTouch(MotionEvent event) {
michael@0:         if (!mActive || !isEnabled() || mScrollingPages) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         ensureVisible();
michael@0: 
michael@0:         switch (event.getActionMasked()) {
michael@0:             case MotionEvent.ACTION_DOWN: {
michael@0:                 // Track the beginning of the touch
michael@0:                 mTouchY = event.getRawY();
michael@0:                 break;
michael@0:             }
michael@0: 
michael@0:             case MotionEvent.ACTION_MOVE: {
michael@0:                 final float curY = event.getRawY();
michael@0:                 final float delta = mTouchY - curY;
michael@0:                 mSnapBannerToTop = delta <= 0.0f;
michael@0: 
michael@0:                 float newTranslationY = ViewHelper.getTranslationY(this) + delta;
michael@0: 
michael@0:                 // Clamp the values to be between 0 and height.
michael@0:                 if (newTranslationY < 0.0f) {
michael@0:                     newTranslationY = 0.0f;
michael@0:                 } else if (newTranslationY > mHeight) {
michael@0:                     newTranslationY = mHeight;
michael@0:                 }
michael@0: 
michael@0:                 // Don't change this value if it wasn't a significant movement
michael@0:                 if (delta >= 10 || delta <= -10) {
michael@0:                     mUserSwipedDown = (newTranslationY == mHeight);
michael@0:                 }
michael@0: 
michael@0:                 ViewHelper.setTranslationY(this, newTranslationY);
michael@0:                 mTouchY = curY;
michael@0:                 break;
michael@0:             }
michael@0: 
michael@0:             case MotionEvent.ACTION_UP:
michael@0:             case MotionEvent.ACTION_CANCEL: {
michael@0:                 mTouchY = -1;
michael@0:                 if (mSnapBannerToTop) {
michael@0:                     animateUp();
michael@0:                 } else {
michael@0:                     animateDown();
michael@0:                     mUserSwipedDown = true;
michael@0:                 }
michael@0:                 break;
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: }