/**
* "pop" operation ends if destPage is found, if destPage is not found, the method call is a no-op
*
* @param destPage page as the destination for this pop operation
* @param animated true to animate the transition
*/
public void popToPage(
Page destPage, boolean animated, PageAnimator.AnimationDirection animationDirection) {
if (mAnimating) {
return;
}
if (destPage == null) {
throw new IllegalArgumentException("cannot call popToPage() with null destPage.");
}
if (mPageStack.size() <= 0
|| mPageStack.lastIndexOf(destPage) == -1
|| mPageStack.peekLast() == destPage) {
return;
}
Page oldPage = mPageStack.removeLast();
if (mEnableDebug) {
Log.d(TAG, String.format(">>>> popPage, pagestack=%d, %s", mPageStack.size(), oldPage));
}
while (mPageStack.size() > 1) {
if (mPageStack.peekLast() == destPage) {
break;
}
Page page = mPageStack.removeLast();
page.onHide();
mContainerView.removeView(page.getView());
page.onDetached();
page.onHidden();
}
popPageInternal(oldPage, animated, animationDirection);
}
public void popTopNPages(
int n, boolean animated, PageAnimator.AnimationDirection animationDirection) {
if (mAnimating) {
return;
}
if (n <= 0 || mPageStack.size() <= 0) {
return;
}
Page oldPage = mPageStack.removeLast();
--n; // for mPageStack.removeLast() above
while (--n >= 0) {
Page page = mPageStack.removeLast();
page.onHide();
mContainerView.removeView(page.getView());
page.onDetached();
page.onHidden();
if (mEnableDebug) {
Log.d(TAG, String.format(">>>> popPage, pagestack=%d, %s", mPageStack.size(), page));
}
}
popPageInternal(oldPage, animated, animationDirection);
}
private void doFinalWorkForPopPageInternal(Page removedPage, Page prevPage) {
mContainerView.removeView(removedPage.getView());
removedPage.onDetached();
removedPage.onHidden();
if (prevPage != null) {
if (prevPage == getTopPage()) {
prevPage.getView().bringToFront();
}
prevPage.onUncovered(removedPage.getReturnData());
}
}
/**
* "pop" operation ends when one of the classes specified by pageClasses is found, if none of the
* classes is found, the method call is a no-op
*
* @param pageClasses classes of pages as the destination for this pop operation
* @param animated true to animate the transition
*/
public void popToClasses(
Class<? extends Page>[] pageClasses,
boolean animated,
PageAnimator.AnimationDirection animationDirection) {
if (mAnimating) {
return;
}
if (pageClasses == null || pageClasses.length == 0) {
throw new IllegalArgumentException(
"cannot call popToClasses() with null or empty pageClasses.");
}
if (mPageStack.size() <= 0) {
return;
}
// do nothing if the topPage is the page we want to navigate to
Class topPageClass = mPageStack.peekLast().getClass();
for (Class pageClass : pageClasses) {
if (pageClass == topPageClass) {
return;
}
}
// do nothing if the page we want to navigate to does not exist
boolean hasDestClass = false;
Iterator<Page> it = mPageStack.descendingIterator();
LOOP1:
while (it.hasNext()) {
Class destPageClass = it.next().getClass();
for (Class pageClass : pageClasses) {
if (destPageClass == pageClass) {
hasDestClass = true;
break LOOP1;
}
}
}
if (!hasDestClass) {
return;
}
Page oldPage = mPageStack.removeLast();
LOOP2:
while (mPageStack.size() > 1) {
Class lastPageClass = mPageStack.peekLast().getClass();
for (Class pageClass : pageClasses) {
if (lastPageClass == pageClass) {
break LOOP2;
}
}
Page page = mPageStack.removeLast();
page.onHide();
mContainerView.removeView(page.getView());
page.onDetached();
page.onHidden();
}
popPageInternal(oldPage, animated, animationDirection);
}
