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DoorHangerPopup.java
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DoorHangerPopup.java
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/* -*- 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.util.GeckoEventListener;
import org.json.JSONArray;
import org.json.JSONObject;
import android.graphics.drawable.BitmapDrawable;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;
import java.util.HashSet;
public class DoorHangerPopup extends PopupWindow
implements GeckoEventListener, Tabs.OnTabsChangedListener {
private static final String LOGTAG = "GeckoDoorHangerPopup";
private GeckoApp mActivity;
private View mAnchor;
private LinearLayout mContent;
private boolean mInflated;
private ImageView mArrow;
private int mArrowWidth;
private int mYOffset;
// Stores a set of all active DoorHanger notifications. A DoorHanger is
// uniquely identified by its tabId and value.
private HashSet<DoorHanger> mDoorHangers;
DoorHangerPopup(GeckoApp aActivity, View aAnchor) {
super(aActivity);
mActivity = aActivity;
mAnchor = aAnchor;
mInflated = false;
mArrowWidth = aActivity.getResources().getDimensionPixelSize(R.dimen.menu_popup_arrow_width);
mYOffset = aActivity.getResources().getDimensionPixelSize(R.dimen.menu_popup_offset);
mDoorHangers = new HashSet<DoorHanger>();
registerEventListener("Doorhanger:Add");
registerEventListener("Doorhanger:Remove");
Tabs.registerOnTabsChangedListener(this);
}
void destroy() {
unregisterEventListener("Doorhanger:Add");
unregisterEventListener("Doorhanger:Remove");
Tabs.unregisterOnTabsChangedListener(this);
}
void setAnchor(View aAnchor) {
mAnchor = aAnchor;
}
@Override
public void handleMessage(String event, JSONObject geckoObject) {
try {
if (event.equals("Doorhanger:Add")) {
final int tabId = geckoObject.getInt("tabID");
final String value = geckoObject.getString("value");
final String message = geckoObject.getString("message");
final JSONArray buttons = geckoObject.getJSONArray("buttons");
final JSONObject options = geckoObject.getJSONObject("options");
mActivity.runOnUiThread(new Runnable() {
@Override
public void run() {
addDoorHanger(tabId, value, message, buttons, options);
}
});
} else if (event.equals("Doorhanger:Remove")) {
final int tabId = geckoObject.getInt("tabID");
final String value = geckoObject.getString("value");
mActivity.runOnUiThread(new Runnable() {
@Override
public void run() {
DoorHanger doorHanger = getDoorHanger(tabId, value);
if (doorHanger == null)
return;
removeDoorHanger(doorHanger);
updatePopup();
}
});
}
} catch (Exception e) {
Log.e(LOGTAG, "Exception handling message \"" + event + "\":", e);
}
}
// This callback is automatically executed on the UI thread.
@Override
public void onTabChanged(final Tab tab, final Tabs.TabEvents msg, final Object data) {
switch(msg) {
case CLOSED:
// Remove any doorhangers for a tab when it's closed (make
// a temporary set to avoid a ConcurrentModificationException)
HashSet<DoorHanger> doorHangersToRemove = new HashSet<DoorHanger>();
for (DoorHanger dh : mDoorHangers) {
if (dh.getTabId() == tab.getId())
doorHangersToRemove.add(dh);
}
for (DoorHanger dh : doorHangersToRemove) {
removeDoorHanger(dh);
}
break;
case LOCATION_CHANGE:
// Only remove doorhangers if the popup is hidden or if we're navigating to a new URL
if (!isShowing() || !data.equals(tab.getURL()))
removeTransientDoorHangers(tab.getId());
// Update the popup if the location change was on the current tab
if (Tabs.getInstance().isSelectedTab(tab))
updatePopup();
break;
case SELECTED:
// Always update the popup when a new tab is selected. This will cover cases
// where a different tab was closed, since we always need to select a new tab.
updatePopup();
break;
}
}
private void init() {
setBackgroundDrawable(new BitmapDrawable());
setOutsideTouchable(true);
setWindowLayoutMode(mActivity.isTablet() ? ViewGroup.LayoutParams.WRAP_CONTENT : ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
LayoutInflater inflater = LayoutInflater.from(mActivity);
RelativeLayout layout = (RelativeLayout) inflater.inflate(R.layout.doorhangerpopup, null);
mArrow = (ImageView) layout.findViewById(R.id.doorhanger_arrow);
mContent = (LinearLayout) layout.findViewById(R.id.doorhanger_container);
setContentView(layout);
mInflated = true;
}
/**
* Adds a doorhanger.
*
* This method must be called on the UI thread.
*/
void addDoorHanger(final int tabId, final String value, final String message,
final JSONArray buttons, final JSONObject options) {
// Don't add a doorhanger for a tab that doesn't exist
if (Tabs.getInstance().getTab(tabId) == null)
return;
// Replace the doorhanger if it already exists
DoorHanger oldDoorHanger = getDoorHanger(tabId, value);
if (oldDoorHanger != null)
removeDoorHanger(oldDoorHanger);
final DoorHanger newDoorHanger = new DoorHanger(mActivity, this, tabId, value);
mDoorHangers.add(newDoorHanger);
if (!mInflated)
init();
newDoorHanger.init(message, buttons, options);
mContent.addView(newDoorHanger);
// Only update the popup if we're adding a notifcation to the selected tab
if (tabId == Tabs.getInstance().getSelectedTab().getId())
updatePopup();
}
/**
* Gets a doorhanger.
*
* This method must be called on the UI thread.
*/
DoorHanger getDoorHanger(int tabId, String value) {
for (DoorHanger dh : mDoorHangers) {
if (dh.getTabId() == tabId && dh.getValue().equals(value))
return dh;
}
// If there's no doorhanger for the given tabId and value, return null
return null;
}
/**
* Removes a doorhanger.
*
* This method must be called on the UI thread.
*/
void removeDoorHanger(final DoorHanger doorHanger) {
mDoorHangers.remove(doorHanger);
mContent.removeView(doorHanger);
}
/**
* Removes doorhangers for a given tab.
*
* This method must be called on the UI thread.
*/
void removeTransientDoorHangers(int tabId) {
// Make a temporary set to avoid a ConcurrentModificationException
HashSet<DoorHanger> doorHangersToRemove = new HashSet<DoorHanger>();
for (DoorHanger dh : mDoorHangers) {
// Only remove transient doorhangers for the given tab
if (dh.getTabId() == tabId && dh.shouldRemove())
doorHangersToRemove.add(dh);
}
for (DoorHanger dh : doorHangersToRemove) {
removeDoorHanger(dh);
}
}
/**
* Updates the popup state.
*
* This method must be called on the UI thread.
*/
void updatePopup() {
// Bail if the selected tab is null, if there are no active doorhangers,
// or if we haven't inflated the layout yet (this can happen if updatePopup()
// is called before the runnable from addDoorHanger() runs).
Tab tab = Tabs.getInstance().getSelectedTab();
if (tab == null || mDoorHangers.size() == 0 || !mInflated) {
dismiss();
return;
}
// Show doorhangers for the selected tab
int tabId = tab.getId();
boolean shouldShowPopup = false;
for (DoorHanger dh : mDoorHangers) {
if (dh.getTabId() == tabId) {
dh.setVisibility(View.VISIBLE);
shouldShowPopup = true;
} else {
dh.setVisibility(View.GONE);
}
}
// Dismiss the popup if there are no doorhangers to show for this tab
if (!shouldShowPopup) {
dismiss();
return;
}
showDividers();
if (isShowing()) {
update();
return;
}
// If there's no anchor, just show the popup at the top of the gecko app view.
if (mAnchor == null) {
showAtLocation(mActivity.getView(), Gravity.TOP, 0, 0);
return;
}
// On tablets, we need to position the popup so that the center of the arrow points to the
// center of the anchor view. On phones the popup stretches across the entire screen, so the
// arrow position is determined by its left margin.
int offset = mActivity.isTablet() ? mAnchor.getWidth()/2 - mArrowWidth/2 -
((RelativeLayout.LayoutParams) mArrow.getLayoutParams()).leftMargin : 0;
showAsDropDown(mAnchor, offset, -mYOffset);
// Make the popup focusable for keyboard accessibility.
setFocusable(true);
}
private void showDividers() {
int count = mContent.getChildCount();
for (int i = 0; i < count; i++) {
DoorHanger dh = (DoorHanger) mContent.getChildAt(i);
dh.showDivider();
}
((DoorHanger) mContent.getChildAt(count-1)).hideDivider();
}
private void registerEventListener(String event) {
GeckoAppShell.getEventDispatcher().registerEventListener(event, this);
}
private void unregisterEventListener(String event) {
GeckoAppShell.getEventDispatcher().unregisterEventListener(event, this);
}
@Override
public void dismiss() {
// If the popup is focusable while it is hidden, we run into crashes
// on pre-ICS devices when the popup gets focus before it is shown.
setFocusable(false);
super.dismiss();
}
}