The Tor Browser: mobile/android/base/TabsTray.java@6474c204b198 (annotated)

mobile/android/base/TabsTray.java@6474c204b198 (annotated)

mobile/android/base/TabsTray.java

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- 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 java.util.ArrayList;
 import java.util.List;
 import org.mozilla.gecko.animation.PropertyAnimator;
 import org.mozilla.gecko.animation.PropertyAnimator.Property;
 import org.mozilla.gecko.animation.ViewHelper;
 import org.mozilla.gecko.widget.TwoWayView;
 import org.mozilla.gecko.widget.TabThumbnailWrapper;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.VelocityTracker;
 import android.view.View;
 import android.view.ViewConfiguration;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
 import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
 public class TabsTray extends TwoWayView
     implements TabsPanel.PanelView {
     private static final String LOGTAG = "GeckoTabsTray";
     private Context mContext;
     private TabsPanel mTabsPanel;
     private TabsAdapter mTabsAdapter;
     private List<View> mPendingClosedTabs;
     private int mCloseAnimationCount;
     private TabSwipeGestureListener mSwipeListener;
     // Time to animate non-flinged tabs of screen, in milliseconds
     private static final int ANIMATION_DURATION = 250;
     private static final String ABOUT_HOME = "about:home";
     private int mOriginalSize = 0;
     public TabsTray(Context context, AttributeSet attrs) {
         super(context, attrs);
         mContext = context;
         mCloseAnimationCount = 0;
         mPendingClosedTabs = new ArrayList<View>();
         setItemsCanFocus(true);
         TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.TabsTray);
         boolean isPrivate = (a.getInt(R.styleable.TabsTray_tabs, 0x0) == 1);
         a.recycle();
         mTabsAdapter = new TabsAdapter(mContext, isPrivate);
         setAdapter(mTabsAdapter);
         mSwipeListener = new TabSwipeGestureListener();
         setOnTouchListener(mSwipeListener);
         setOnScrollListener(mSwipeListener.makeScrollListener());
         setRecyclerListener(new RecyclerListener() {
             @Override
             public void onMovedToScrapHeap(View view) {
                 TabRow row = (TabRow) view.getTag();
                 row.thumbnail.setImageDrawable(null);
                 row.close.setVisibility(View.VISIBLE);
             }
         });
     }
     @Override
     public ViewGroup getLayout() {
         return this;
     }
     @Override
     public void setTabsPanel(TabsPanel panel) {
         mTabsPanel = panel;
     }
     @Override
     public void show() {
         setVisibility(View.VISIBLE);
         Tabs.getInstance().refreshThumbnails();
         Tabs.registerOnTabsChangedListener(mTabsAdapter);
         mTabsAdapter.refreshTabsData();
     }
     @Override
     public void hide() {
         setVisibility(View.GONE);
         Tabs.unregisterOnTabsChangedListener(mTabsAdapter);
         GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("Tab:Screenshot:Cancel",""));
         mTabsAdapter.clear();
     }
     @Override
     public boolean shouldExpand() {
         return isVertical();
     }
     private void autoHidePanel() {
         mTabsPanel.autoHidePanel();
     }
     // ViewHolder for a row in the list
     private class TabRow {
         int id;
         TextView title;
         ImageView thumbnail;
         ImageButton close;
         ViewGroup info;
         TabThumbnailWrapper thumbnailWrapper;
         public TabRow(View view) {
             info = (ViewGroup) view;
             title = (TextView) view.findViewById(R.id.title);
             thumbnail = (ImageView) view.findViewById(R.id.thumbnail);
             close = (ImageButton) view.findViewById(R.id.close);
             thumbnailWrapper = (TabThumbnailWrapper) view.findViewById(R.id.wrapper);
         }
     }
     // Adapter to bind tabs into a list
     private class TabsAdapter extends BaseAdapter implements Tabs.OnTabsChangedListener {
         private Context mContext;
         private boolean mIsPrivate;
         private ArrayList<Tab> mTabs;
         private LayoutInflater mInflater;
         private Button.OnClickListener mOnCloseClickListener;
         public TabsAdapter(Context context, boolean isPrivate) {
             mContext = context;
             mInflater = LayoutInflater.from(mContext);
             mIsPrivate = isPrivate;
             mOnCloseClickListener = new Button.OnClickListener() {
                 @Override
                 public void onClick(View v) {
                     TabRow tab = (TabRow) v.getTag();
                     final int pos = (isVertical() ? tab.info.getWidth() : tab.info.getHeight());
                     animateClose(tab.info, pos);
                 }
             };
         }
         @Override
         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:
                     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:
                 case RECORDING_CHANGE:
                     View view = TabsTray.this.getChildAt(getPositionForTab(tab) - TabsTray.this.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) {
                 if (tab.isPrivate() == mIsPrivate)
                     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());
             updateSelectedStyle(selected);
             if (selected != -1) {
                 TabsTray.this.setSelection(selected);
             }
         }
         /**
          * Updates the selected/unselected style for the tabs.
          *
          * @param selected position of the selected tab
          */
         private void updateSelectedStyle(int selected) {
             for (int i = 0; i < getCount(); i++) {
                 TabsTray.this.setItemChecked(i, (i == selected));
             }
         }
         public void clear() {
             mTabs = null;
             notifyDataSetChanged(); // Be sure to call this whenever mTabs changes.
         }
         @Override
         public int getCount() {
             return (mTabs == null ? 0 : mTabs.size());
         }
         @Override
         public Tab getItem(int position) {
             return mTabs.get(position);
         }
         @Override
         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) {
             if (tab.isPrivate() == mIsPrivate && mTabs != null) {
                 mTabs.remove(tab);
                 notifyDataSetChanged(); // Be sure to call this whenever mTabs changes.
                 int selected = getPositionForTab(Tabs.getInstance().getSelectedTab());
                 updateSelectedStyle(selected);
             }
         }
         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 (AboutPages.isAboutHome(tab.getURL())) {
                 row.thumbnail.setImageResource(R.drawable.abouthome_thumbnail);
             } else {
                 row.thumbnail.setImageResource(R.drawable.tab_thumbnail_default);
             }
             if (row.thumbnailWrapper != null) {
                 row.thumbnailWrapper.setRecording(tab.isRecording());
             }
             row.title.setText(tab.getDisplayTitle());
             row.close.setTag(row);
         }
         private void resetTransforms(View view) {
             ViewHelper.setAlpha(view, 1);
             if (mOriginalSize == 0)
                 return;
             if (isVertical()) {
                 ViewHelper.setHeight(view, mOriginalSize);
                 ViewHelper.setTranslationX(view, 0);
             } else {
                 ViewHelper.setWidth(view, mOriginalSize);
                 ViewHelper.setTranslationY(view, 0);
             }
         }
         @Override
         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();
                 // If we're recycling this view, there's a chance it was transformed during
                 // the close animation. Remove any of those properties.
                 resetTransforms(convertView);
             }
             Tab tab = mTabs.get(position);
             assignValues(row, tab);
             return convertView;
         }
     }
     private boolean isVertical() {
         return (getOrientation().compareTo(TwoWayView.Orientation.VERTICAL) == 0);
     }
     private void animateClose(final View view, int pos) {
         PropertyAnimator animator = new PropertyAnimator(ANIMATION_DURATION);
         animator.attach(view, Property.ALPHA, 0);
         if (isVertical())
             animator.attach(view, Property.TRANSLATION_X, pos);
         else
             animator.attach(view, Property.TRANSLATION_Y, pos);
         mCloseAnimationCount++;
         mPendingClosedTabs.add(view);
         animator.addPropertyAnimationListener(new PropertyAnimator.PropertyAnimationListener() {
             @Override
             public void onPropertyAnimationStart() { }
             @Override
             public void onPropertyAnimationEnd() {
                 mCloseAnimationCount--;
                 if (mCloseAnimationCount > 0)
                     return;
                 for (View pendingView : mPendingClosedTabs) {
                     animateFinishClose(pendingView);
                 }
                 mPendingClosedTabs.clear();
             }
         });
         if (mTabsAdapter.getCount() == 1)
             autoHidePanel();
         animator.start();
     }
     private void animateFinishClose(final View view) {
         PropertyAnimator animator = new PropertyAnimator(ANIMATION_DURATION);
         final boolean isVertical = isVertical();
         if (isVertical)
             animator.attach(view, Property.HEIGHT, 1);
         else
             animator.attach(view, Property.WIDTH, 1);
         TabRow tab = (TabRow)view.getTag();
         final int tabId = tab.id;
         // Caching this assumes that all rows are the same height
 	if (mOriginalSize == 0)
             mOriginalSize = (isVertical ? view.getHeight() : view.getWidth());
         animator.addPropertyAnimationListener(new PropertyAnimator.PropertyAnimationListener() {
             @Override
             public void onPropertyAnimationStart() { }
             @Override
             public void onPropertyAnimationEnd() {
                 Tabs tabs = Tabs.getInstance();
                 Tab tab = tabs.getTab(tabId);
                 tabs.closeTab(tab);
             }
         });
         animator.start();
     }
     private void animateCancel(final View view) {
         PropertyAnimator animator = new PropertyAnimator(ANIMATION_DURATION);
         animator.attach(view, Property.ALPHA, 1);
         if (isVertical())
             animator.attach(view, Property.TRANSLATION_X, 0);
         else
             animator.attach(view, Property.TRANSLATION_Y, 0);
         animator.addPropertyAnimationListener(new PropertyAnimator.PropertyAnimationListener() {
             @Override
             public void onPropertyAnimationStart() { }
             @Override
             public void onPropertyAnimationEnd() {
                 TabRow tab = (TabRow) view.getTag();
                 tab.close.setVisibility(View.VISIBLE);
             }
         });
         animator.start();
     }
     private class TabSwipeGestureListener implements View.OnTouchListener {
         // same value the stock browser uses for after drag animation velocity in pixels/sec
         // http://androidxref.com/4.0.4/xref/packages/apps/Browser/src/com/android/browser/NavTabScroller.java#61
         private static final float MIN_VELOCITY = 750;
         private int mSwipeThreshold;
         private int mMinFlingVelocity;
         private int mMaxFlingVelocity;
         private VelocityTracker mVelocityTracker;
         private int mListWidth = 1;
         private int mListHeight = 1;
         private View mSwipeView;
         private int mSwipeViewPosition;
         private Runnable mPendingCheckForTap;
         private float mSwipeStartX;
         private float mSwipeStartY;
         private boolean mSwiping;
         private boolean mEnabled;
         public TabSwipeGestureListener() {
             mSwipeView = null;
             mSwipeViewPosition = TwoWayView.INVALID_POSITION;
             mSwiping = false;
             mEnabled = true;
             ViewConfiguration vc = ViewConfiguration.get(TabsTray.this.getContext());
             mSwipeThreshold = vc.getScaledTouchSlop();
             mMinFlingVelocity = (int) (getContext().getResources().getDisplayMetrics().density * MIN_VELOCITY);
             mMaxFlingVelocity = vc.getScaledMaximumFlingVelocity();
         }
         public void setEnabled(boolean enabled) {
             mEnabled = enabled;
         }
         public TwoWayView.OnScrollListener makeScrollListener() {
             return new TwoWayView.OnScrollListener() {
                 @Override
                 public void onScrollStateChanged(TwoWayView twoWayView, int scrollState) {
                     setEnabled(scrollState != TwoWayView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
                 }
                 @Override
                 public void onScroll(TwoWayView twoWayView, int i, int i1, int i2) {
                 }
             };
         }
         @Override
         public boolean onTouch(View view, MotionEvent e) {
             if (!mEnabled)
                 return false;
             if (mListWidth < 2 || mListHeight < 2) {
                 mListWidth = TabsTray.this.getWidth();
                 mListHeight = TabsTray.this.getHeight();
             }
             switch (e.getActionMasked()) {
                 case MotionEvent.ACTION_DOWN: {
                     // Check if we should set pressed state on the
                     // touched view after a standard delay.
                     triggerCheckForTap();
                     final float x = e.getRawX();
                     final float y = e.getRawY();
                     // Find out which view is being touched
                     mSwipeView = findViewAt(x, y);
                     if (mSwipeView != null) {
                         mSwipeStartX = e.getRawX();
                         mSwipeStartY = e.getRawY();
                         mSwipeViewPosition = TabsTray.this.getPositionForView(mSwipeView);
                         mVelocityTracker = VelocityTracker.obtain();
                         mVelocityTracker.addMovement(e);
                     }
                     view.onTouchEvent(e);
                     return true;
                 }
                 case MotionEvent.ACTION_UP: {
                     if (mSwipeView == null)
                         break;
                     cancelCheckForTap();
                     mSwipeView.setPressed(false);
                     if (!mSwiping) {
                         TabRow tab = (TabRow) mSwipeView.getTag();
                         Tabs.getInstance().selectTab(tab.id);
                         autoHidePanel();
                         break;
                     }
                     mVelocityTracker.addMovement(e);
                     mVelocityTracker.computeCurrentVelocity(1000, mMaxFlingVelocity);
                     float velocityX = Math.abs(mVelocityTracker.getXVelocity());
                     float velocityY = Math.abs(mVelocityTracker.getYVelocity());
                     boolean dismiss = false;
                     boolean dismissDirection = false;
                     int dismissTranslation = 0;
                     if (isVertical()) {
                         float deltaX = ViewHelper.getTranslationX(mSwipeView);
                         if (Math.abs(deltaX) > mListWidth / 2) {
                             dismiss = true;
                             dismissDirection = (deltaX > 0);
                         } else if (mMinFlingVelocity <= velocityX && velocityX <= mMaxFlingVelocity
                                 && velocityY < velocityX) {
                             dismiss = mSwiping && (deltaX * mVelocityTracker.getXVelocity() > 0);
                             dismissDirection = (mVelocityTracker.getXVelocity() > 0);
                         }
                         dismissTranslation = (dismissDirection ? mListWidth : -mListWidth);
                     } else {
                         float deltaY = ViewHelper.getTranslationY(mSwipeView);
                         if (Math.abs(deltaY) > mListHeight / 2) {
                             dismiss = true;
                             dismissDirection = (deltaY > 0);
                         } else if (mMinFlingVelocity <= velocityY && velocityY <= mMaxFlingVelocity
                                 && velocityX < velocityY) {
                             dismiss = mSwiping && (deltaY * mVelocityTracker.getYVelocity() > 0);
                             dismissDirection = (mVelocityTracker.getYVelocity() > 0);
                         }
                         dismissTranslation = (dismissDirection ? mListHeight : -mListHeight);
                      }
                     if (dismiss)
                         animateClose(mSwipeView, dismissTranslation);
                     else
                         animateCancel(mSwipeView);
                     mVelocityTracker = null;
                     mSwipeView = null;
                     mSwipeViewPosition = TwoWayView.INVALID_POSITION;
                     mSwipeStartX = 0;
                     mSwipeStartY = 0;
                     mSwiping = false;
                     break;
                 }
                 case MotionEvent.ACTION_MOVE: {
                     if (mSwipeView == null)
                         break;
                     mVelocityTracker.addMovement(e);
                     final boolean isVertical = isVertical();
                     float deltaX = e.getRawX() - mSwipeStartX;
                     float deltaY = e.getRawY() - mSwipeStartY;
                     float delta = (isVertical ? deltaX : deltaY);
                     boolean isScrollingX = Math.abs(deltaX) > mSwipeThreshold;
                     boolean isScrollingY = Math.abs(deltaY) > mSwipeThreshold;
                     boolean isSwipingToClose = (isVertical ? isScrollingX : isScrollingY);
                     // If we're actually swiping, make sure we don't
                     // set pressed state on the swiped view.
                     if (isScrollingX || isScrollingY)
                         cancelCheckForTap();
                     if (isSwipingToClose) {
                         mSwiping = true;
                         TabsTray.this.requestDisallowInterceptTouchEvent(true);
                         TabRow tab = (TabRow) mSwipeView.getTag();
                         tab.close.setVisibility(View.INVISIBLE);
                         // Stops listview from highlighting the touched item
                         // in the list when swiping.
                         MotionEvent cancelEvent = MotionEvent.obtain(e);
                         cancelEvent.setAction(MotionEvent.ACTION_CANCEL |
                                 (e.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));
                         TabsTray.this.onTouchEvent(cancelEvent);
                     }
                     if (mSwiping) {
                         if (isVertical)
                             ViewHelper.setTranslationX(mSwipeView, delta);
                         else
                             ViewHelper.setTranslationY(mSwipeView, delta);
                         ViewHelper.setAlpha(mSwipeView, Math.max(0.1f, Math.min(1f,
 f - 2f * Math.abs(delta) / (isVertical ? mListWidth : mListHeight))));
                         return true;
                     }
                     break;
                 }
             }
             return false;
         }
         private View findViewAt(float rawX, float rawY) {
             Rect rect = new Rect();
             int[] listViewCoords = new int[2];
             TabsTray.this.getLocationOnScreen(listViewCoords);
             int x = (int) rawX - listViewCoords[0];
             int y = (int) rawY - listViewCoords[1];
             for (int i = 0; i < TabsTray.this.getChildCount(); i++) {
                 View child = TabsTray.this.getChildAt(i);
                 child.getHitRect(rect);
                 if (rect.contains(x, y))
                     return child;
             }
             return null;
         }
         private void triggerCheckForTap() {
             if (mPendingCheckForTap == null)
                 mPendingCheckForTap = new CheckForTap();
             TabsTray.this.postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
         }
         private void cancelCheckForTap() {
             if (mPendingCheckForTap == null)
                 return;
             TabsTray.this.removeCallbacks(mPendingCheckForTap);
         }
         private class CheckForTap implements Runnable {
             @Override
             public void run() {
                 if (!mSwiping && mSwipeView != null && mEnabled)
                     mSwipeView.setPressed(true);
             }
         }
     }
 }

The Tor Browser / annotate

mobile/android/base/TabsTray.java@6474c204b198 (annotated)

mobile/android/base/TabsTray.java