mirror of
https://github.com/mozilla/gecko-dev.git
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446 lines
16 KiB
Java
446 lines
16 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko;
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import java.util.ArrayList;
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import android.content.Context;
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import android.graphics.drawable.Drawable;
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import android.graphics.PointF;
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import android.text.TextUtils;
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import android.util.AttributeSet;
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import android.view.GestureDetector;
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import android.view.GestureDetector.SimpleOnGestureListener;
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import android.view.LayoutInflater;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.AbsListView.RecyclerListener;
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import android.widget.BaseAdapter;
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import android.widget.Button;
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import android.widget.ImageButton;
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import android.widget.ImageView;
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import android.widget.LinearLayout;
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import android.widget.ListView;
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import android.widget.TextView;
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import org.mozilla.gecko.PropertyAnimator.Property;
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public class TabsTray extends LinearLayout
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implements TabsPanel.PanelView {
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private static final String LOGTAG = "GeckoTabsTray";
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private Context mContext;
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private static ListView mList;
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private TabsAdapter mTabsAdapter;
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private boolean mWaitingForClose;
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private GestureDetector mGestureDetector;
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private TabSwipeGestureListener mListener;
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// Minimum velocity swipe that will close a tab, in inches/sec
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private static final int SWIPE_CLOSE_VELOCITY = 5;
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// Time to animate non-flicked tabs of screen, in milliseconds
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private static final int MAX_ANIMATION_TIME = 250;
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// Extra weight given to detecting vertical swipes over horizontal ones
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private static final float SWIPE_VERTICAL_WEIGHT = 1.5f;
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private static enum DragDirection {
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UNKNOWN,
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HORIZONTAL,
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VERTICAL
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}
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private static final String ABOUT_HOME = "about:home";
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public TabsTray(Context context, AttributeSet attrs) {
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super(context, attrs);
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mContext = context;
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LayoutInflater.from(context).inflate(R.layout.tabs_tray, this);
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mList = (ListView) findViewById(R.id.list);
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mList.setItemsCanFocus(true);
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mTabsAdapter = new TabsAdapter(mContext);
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mList.setAdapter(mTabsAdapter);
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mListener = new TabSwipeGestureListener(mList);
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mGestureDetector = new GestureDetector(context, mListener);
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mList.setOnTouchListener(new View.OnTouchListener() {
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public boolean onTouch(View v, MotionEvent event) {
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boolean result = mGestureDetector.onTouchEvent(event);
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// if this is an touch end event, we need to reset the state
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// of the gesture listener
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switch (event.getAction() & MotionEvent.ACTION_MASK) {
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case MotionEvent.ACTION_UP:
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mListener.onTouchEnd(event);
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}
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// the simple gesture detector doesn't actually call our methods for every touch event
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// if we're horizontally scrolling we should always return true to prevent scrolling the list
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if (mListener.getDirection() == DragDirection.HORIZONTAL)
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result = true;
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return result;
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}
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});
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mList.setRecyclerListener(new RecyclerListener() {
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@Override
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public void onMovedToScrapHeap(View view) {
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TabRow row = (TabRow) view.getTag();
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row.thumbnail.setImageDrawable(null);
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}
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});
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}
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@Override
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public ViewGroup getLayout() {
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return this;
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}
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@Override
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public void show() {
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mWaitingForClose = false;
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Tabs.getInstance().refreshThumbnails();
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Tabs.registerOnTabsChangedListener(mTabsAdapter);
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mTabsAdapter.refreshTabsData();
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}
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@Override
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public void hide() {
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Tabs.unregisterOnTabsChangedListener(mTabsAdapter);
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GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("Tab:Screenshot:Cancel",""));
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mTabsAdapter.clear();
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}
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void autoHideTabs() {
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GeckoApp.mAppContext.autoHideTabs();
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}
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// ViewHolder for a row in the list
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private class TabRow {
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int id;
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TextView title;
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ImageView thumbnail;
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ImageButton close;
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LinearLayout info;
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public TabRow(View view) {
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info = (LinearLayout) view;
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title = (TextView) view.findViewById(R.id.title);
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thumbnail = (ImageView) view.findViewById(R.id.thumbnail);
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close = (ImageButton) view.findViewById(R.id.close);
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}
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}
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// Adapter to bind tabs into a list
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private class TabsAdapter extends BaseAdapter implements Tabs.OnTabsChangedListener {
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private Context mContext;
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private ArrayList<Tab> mTabs;
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private LayoutInflater mInflater;
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private Button.OnClickListener mOnCloseClickListener;
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public TabsAdapter(Context context) {
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mContext = context;
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mInflater = LayoutInflater.from(mContext);
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mOnCloseClickListener = new Button.OnClickListener() {
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public void onClick(View v) {
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TabRow tab = (TabRow) v.getTag();
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animateTo(tab.info, tab.info.getWidth(), MAX_ANIMATION_TIME);
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}
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};
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}
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public void onTabChanged(Tab tab, Tabs.TabEvents msg, Object data) {
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switch (msg) {
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case ADDED:
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// Refresh the list to make sure the new tab is added in the right position.
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refreshTabsData();
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break;
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case CLOSED:
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mWaitingForClose = false;
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removeTab(tab);
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break;
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case SELECTED:
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// Update the selected position, then fall through...
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updateSelectedPosition();
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case UNSELECTED:
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// We just need to update the style for the unselected tab...
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case THUMBNAIL:
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case TITLE:
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View view = mList.getChildAt(getPositionForTab(tab) - mList.getFirstVisiblePosition());
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if (view == null)
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return;
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TabRow row = (TabRow) view.getTag();
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assignValues(row, tab);
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break;
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}
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}
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private void refreshTabsData() {
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// Store a different copy of the tabs, so that we don't have to worry about
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// accidentally updating it on the wrong thread.
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mTabs = new ArrayList<Tab>();
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ArrayList<Tab> tabs = Tabs.getInstance().getTabsInOrder();
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if (tabs != null) {
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for (Tab tab : tabs) {
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mTabs.add(tab);
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}
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}
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notifyDataSetChanged(); // Be sure to call this whenever mTabs changes.
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updateSelectedPosition();
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}
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// Updates the selected position in the list so that it will be scrolled to the right place.
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private void updateSelectedPosition() {
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int selected = getPositionForTab(Tabs.getInstance().getSelectedTab());
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if (selected == -1)
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return;
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mList.setSelection(selected);
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}
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public void clear() {
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mTabs = null;
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notifyDataSetChanged(); // Be sure to call this whenever mTabs changes.
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}
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public int getCount() {
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return (mTabs == null ? 0 : mTabs.size());
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}
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public Tab getItem(int position) {
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return mTabs.get(position);
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}
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public long getItemId(int position) {
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return position;
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}
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private int getPositionForTab(Tab tab) {
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if (mTabs == null || tab == null)
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return -1;
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return mTabs.indexOf(tab);
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}
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private void removeTab(Tab tab) {
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mTabs.remove(tab);
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notifyDataSetChanged(); // Be sure to call this whenever mTabs changes.
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}
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private void assignValues(TabRow row, Tab tab) {
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if (row == null || tab == null)
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return;
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row.id = tab.getId();
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Drawable thumbnailImage = tab.getThumbnail();
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if (thumbnailImage != null)
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row.thumbnail.setImageDrawable(thumbnailImage);
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else if (TextUtils.equals(tab.getURL(), ABOUT_HOME))
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row.thumbnail.setImageResource(R.drawable.abouthome_thumbnail);
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else
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row.thumbnail.setImageResource(R.drawable.tab_thumbnail_default);
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if (Tabs.getInstance().isSelectedTab(tab))
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row.info.setBackgroundResource(R.drawable.tabs_tray_active_selector);
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else
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row.info.setBackgroundResource(R.drawable.tabs_tray_default_selector);
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// this may be a recycled view that was animated off screen
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// reset the scroll state here
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row.info.scrollTo(0,0);
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row.title.setText(tab.getDisplayTitle());
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row.close.setTag(row);
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row.close.setVisibility(mTabs.size() > 1 ? View.VISIBLE : View.INVISIBLE);
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}
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public View getView(int position, View convertView, ViewGroup parent) {
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TabRow row;
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if (convertView == null) {
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convertView = mInflater.inflate(R.layout.tabs_row, null);
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row = new TabRow(convertView);
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row.close.setOnClickListener(mOnCloseClickListener);
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convertView.setTag(row);
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} else {
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row = (TabRow) convertView.getTag();
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}
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Tab tab = mTabs.get(position);
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assignValues(row, tab);
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return convertView;
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}
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}
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private void animateTo(final View view, int x, int duration) {
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PropertyAnimator pa = new PropertyAnimator(duration);
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pa.attach(view, Property.SLIDE_LEFT, x);
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if (x != 0 && !mWaitingForClose) {
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mWaitingForClose = true;
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TabRow tab = (TabRow)view.getTag();
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final int tabId = tab.id;
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pa.setPropertyAnimationListener(new PropertyAnimator.PropertyAnimationListener() {
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public void onPropertyAnimationStart() { }
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public void onPropertyAnimationEnd() {
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Tabs tabs = Tabs.getInstance();
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Tab tab = tabs.getTab(tabId);
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tabs.closeTab(tab);
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}
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});
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} else if (x != 0 && mWaitingForClose) {
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// if this asked us to close, but we were already doing it just bail out
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return;
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}
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pa.start();
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}
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private class TabSwipeGestureListener extends SimpleOnGestureListener {
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private View mList = null;
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private View mView = null;
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private PointF start = null;
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private DragDirection dir = DragDirection.UNKNOWN;
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public TabSwipeGestureListener(View v) {
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mList = v;
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}
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public DragDirection getDirection() {
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return dir;
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}
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@Override
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public boolean onDown(MotionEvent e) {
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mView = findViewAt((int)e.getX(), (int)e.getY());
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if (mView == null)
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return false;
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mView.setPressed(true);
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start = new PointF(e.getX(), e.getY());
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return false;
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}
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public boolean onTouchEnd(MotionEvent e) {
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if (mView != null) {
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// if the user was dragging horizontally, check to see if we should close the tab
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if (dir == DragDirection.HORIZONTAL) {
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int finalPos = 0;
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// if the swipe started on the left and ended in the right 25% of the tray
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// or vice versa, close the tab
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if ((start.x > mList.getWidth() / 2 && e.getX() < mList.getWidth() * 0.25 )) {
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finalPos = -1 * mView.getWidth();
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} else if (start.x < mList.getWidth() / 2 && e.getX() > mList.getWidth() * 0.75) {
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finalPos = mView.getWidth();
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}
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animateTo(mView, finalPos, MAX_ANIMATION_TIME);
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} else if (mView != null && dir == DragDirection.UNKNOWN) {
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// the user didn't attempt to scroll the view, so select the row
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TabRow tab = (TabRow)mView.getTag();
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int tabId = tab.id;
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Tabs.getInstance().selectTab(tabId);
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autoHideTabs();
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}
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}
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mView = null;
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start = null;
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dir = DragDirection.UNKNOWN;
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return false;
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}
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@Override
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public boolean onScroll(MotionEvent event1, MotionEvent event2, float distanceX, float distanceY) {
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if (mView == null)
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return false;
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// if there is only one tab left, we want to recognize the scroll and
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// stop any click/selection events, but not scroll/close the view
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if (Tabs.getInstance().getCount() == 1) {
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mView.setPressed(false);
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mView = null;
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return false;
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}
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if (dir == DragDirection.UNKNOWN) {
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// check if this scroll is more horizontal than vertical. Weight vertical drags a little higher
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// by using a multiplier
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if (Math.abs(distanceX) > Math.abs(distanceY) * SWIPE_VERTICAL_WEIGHT) {
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dir = DragDirection.HORIZONTAL;
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} else {
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dir = DragDirection.VERTICAL;
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}
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mView.setPressed(false);
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}
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if (dir == DragDirection.HORIZONTAL) {
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mView.scrollBy((int) distanceX, 0);
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return true;
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}
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return false;
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}
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@Override
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public boolean onFling(MotionEvent event1, MotionEvent event2, float velocityX, float velocityY) {
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if (mView == null || Tabs.getInstance().getCount() == 1)
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return false;
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// velocityX is in pixels/sec. divide by pixels/inch to compare it with swipe velocity
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// also make sure that the swipe is in a mostly horizontal direction
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if (Math.abs(velocityX) > Math.abs(velocityY * SWIPE_VERTICAL_WEIGHT) &&
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Math.abs(velocityX)/GeckoAppShell.getDpi() > SWIPE_CLOSE_VELOCITY) {
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// is this is a swipe, we want to continue the row moving at the swipe velocity
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float d = (velocityX > 0 ? 1 : -1) * mView.getWidth();
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// convert the velocity (px/sec) to ms by taking the distance
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// multiply by 1000 to convert seconds to milliseconds
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animateTo(mView, (int)d, (int)((d + mView.getScrollX())*1000/velocityX));
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}
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return false;
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}
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private View findViewAt(int x, int y) {
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if (mList == null)
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return null;
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ListView list = (ListView)mList;
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x += list.getScrollX();
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y += list.getScrollY();
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final int count = list.getChildCount();
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for (int i = count - 1; i >= 0; i--) {
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View child = list.getChildAt(i);
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if (child.getVisibility() == View.VISIBLE) {
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if ((x >= child.getLeft()) && (x < child.getRight())
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&& (y >= child.getTop()) && (y < child.getBottom())) {
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return child;
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}
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}
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}
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return null;
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}
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}
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}
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