gecko/mobile/android/base/TabsTray.java

450 lines
16 KiB
Java

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