// 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;
}
}
/**
* Gets a doorhanger.
*
* <p>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;
}
private void fixBackgroundForFirst() {
for (int i = 0; i < mContent.getChildCount(); i++) {
DoorHanger dh = (DoorHanger) mContent.getChildAt(i);
if (dh.getVisibility() == View.VISIBLE) {
dh.setBackgroundResource(R.drawable.doorhanger_bg);
break;
}
}
}
/**
* Updates the popup state.
*
* <p>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;
}
fixBackgroundForFirst();
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, 0);
// Make the popup focusable for keyboard accessibility.
setFocusable(true);
}
/**
* Removes doorhangers for a given tab.
*
* <p>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);
}
}
/**
* Adds a doorhanger.
*
* <p>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();
}
