/**
* Initialization method that has 3 different behaviors based on whether bookmark model is loaded.
* If the bookmark model is not loaded yet, it pushes a loading state to backstack which contains
* the url from preference. If the model is loaded and the backstack is empty, it creates a state
* by fetching the last visited bookmark url stored in preference. If the bookmark model is loaded
* but backstack contains a pending loading state, it creates a new state by getting the url of
* the loading state and replace the previous loading state with the new normal state.
*/
private void initializeIfBookmarkModelLoaded() {
if (mEnhancedBookmarksModel.isBookmarkModelLoaded()) {
mSearchView.onEnhancedBookmarkDelegateInitialized(this);
mDrawerListView.onEnhancedBookmarkDelegateInitialized(this);
mContentView.onEnhancedBookmarkDelegateInitialized(this);
if (mStateStack.isEmpty()) {
setState(UIState.createStateFromUrl(getUrlFromPreference(), mEnhancedBookmarksModel));
} else if (mStateStack.peek().mState == UIState.STATE_LOADING) {
String url = mStateStack.pop().mUrl;
setState(UIState.createStateFromUrl(url, mEnhancedBookmarksModel));
}
} else {
mContentView.showLoadingUi();
mDrawerListView.showLoadingUi();
mContentView.showLoadingUi();
if (mStateStack.isEmpty() || mStateStack.peek().mState != UIState.STATE_LOADING) {
setState(UIState.createLoadingState(getUrlFromPreference()));
} else if (!mStateStack.isEmpty()) {
// Refresh the UI. This is needed because on tablet, updateForUrl might set up
// loading state too early and at that time all UI components are not created yet.
// Therefore we need to set the previous loading state once again to trigger all UI
// updates.
setState(mStateStack.pop());
}
}
}
/**
* Updates UI based on the new URL on tablet. If the bookmark model is not loaded yet, creates a
* temporary loading state carrying this url. This method is supposed to align with {@link
* EnhancedBookmarkPage#updateForUrl(String)}
*
* <p>
*
* @param url The url to navigate to.
*/
public void updateForUrl(String url) {
if (mEnhancedBookmarksModel != null && mEnhancedBookmarksModel.isBookmarkModelLoaded()) {
setState(UIState.createStateFromUrl(url, mEnhancedBookmarksModel));
} else {
// Note this does not guarantee to update the UI, as at this time the onCreateView()
// might not has even been called yet.
setState(UIState.createLoadingState(url));
}
}
@Override
public void bookmarkModelChanged() {
// If the folder no longer exists in folder mode, we need to fall back. Relying on the
// default behavior by setting the folder mode again.
if (getCurrentState() == UIState.STATE_FOLDER) {
setState(mStateStack.peek());
}
clearSelection();
}
/**
* Called when the user presses the back key. This is only going to be called on Phone.
*
* @return True if manager handles this event, false if it decides to ignore.
*/
public boolean onBackPressed() {
if (doesDrawerExist()) {
if (mDrawer.isDrawerVisible(Gravity.START)) {
mDrawer.closeDrawer(Gravity.START);
return true;
}
}
if (mContentView.onBackPressed()) return true;
if (!mStateStack.empty()) {
mStateStack.pop();
if (!mStateStack.empty()) {
setState(mStateStack.pop());
return true;
}
}
return false;
}
@Override
public void openFilter(EnhancedBookmarkFilter filter) {
setState(UIState.createFilterState(filter, mEnhancedBookmarksModel));
}
@Override
public void openAllBookmarks() {
closeSearchUI();
setState(UIState.createAllBookmarksState(mEnhancedBookmarksModel));
}
@Override
public void openFolder(BookmarkId folder) {
closeSearchUI();
setState(UIState.createFolderState(folder, mEnhancedBookmarksModel));
}