PassRefPtr<HistoryItem> HistoryController::createItemTree(Frame* targetFrame, bool clipAtTarget)
{
RefPtr<HistoryItem> bfItem = createItem();
saveScrollPositionAndViewStateToItem(m_previousItem.get());
if (!clipAtTarget || m_frame != targetFrame) {
// save frame state for items that aren't loading (khtml doesn't save those)
saveDocumentState();
// clipAtTarget is false for navigations within the same document, so
// we should copy the documentSequenceNumber over to the newly create
// item. Non-target items are just clones, and they should therefore
// preserve the same itemSequenceNumber.
if (m_previousItem) {
if (m_frame != targetFrame)
bfItem->setItemSequenceNumber(m_previousItem->itemSequenceNumber());
bfItem->setDocumentSequenceNumber(m_previousItem->documentSequenceNumber());
}
for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling()) {
// If the child is a frame corresponding to an <object> element that never loaded,
// we don't want to create a history item, because that causes fallback content
// to be ignored on reload.
FrameLoader* childLoader = child->loader();
if (childLoader->stateMachine()->startedFirstRealLoad() || !child->ownerElement()->isObjectElement())
bfItem->addChildItem(childLoader->history()->createItemTree(targetFrame, clipAtTarget));
}
}
// FIXME: Eliminate the isTargetItem flag in favor of itemSequenceNumber.
if (m_frame == targetFrame)
bfItem->setIsTargetItem(true);
return bfItem;
}
void HistoryController::recursiveUpdateForCommit()
{
// The frame that navigated will now have a null provisional item.
// Ignore it and its children.
if (!m_provisionalItem)
return;
// For each frame that already had the content the item requested (based on
// (a matching URL and frame tree snapshot), just restore the scroll position.
// Save form state (works from currentItem, since m_frameLoadComplete is true)
if (m_currentItem && itemsAreClones(m_currentItem.get(), m_provisionalItem.get())) {
ASSERT(m_frameLoadComplete);
saveDocumentState();
saveScrollPositionAndViewStateToItem(m_currentItem.get());
if (FrameView* view = m_frame->view())
view->setWasScrolledByUser(false);
// Now commit the provisional item
m_frameLoadComplete = false;
m_previousItem = m_currentItem;
m_currentItem = m_provisionalItem;
m_provisionalItem = 0;
// Restore form state (works from currentItem)
restoreDocumentState();
// Restore the scroll position (we choose to do this rather than going back to the anchor point)
restoreScrollPositionAndViewState();
}
// Iterate over the rest of the tree
for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling())
child->loader()->history()->recursiveUpdateForCommit();
}
void HistoryController::updateForBackForwardNavigation()
{
#if !LOG_DISABLED
if (m_frame->loader()->documentLoader())
LOG(History, "WebCoreHistory: Updating History for back/forward navigation in frame %s", m_frame->loader()->documentLoader()->title().utf8().data());
#endif
// Must grab the current scroll position before disturbing it
saveScrollPositionAndViewStateToItem(m_previousItem.get());
}
void HistoryController::updateForBackForwardNavigation()
{
LOG(History, "HistoryController %p updateForBackForwardNavigation: Updating History for back/forward navigation in frame %p (main frame %d) %s", this, &m_frame, m_frame.isMainFrame(), m_frame.loader().documentLoader() ? m_frame.loader().documentLoader()->url().string().utf8().data() : "");
// Must grab the current scroll position before disturbing it
if (!m_frameLoadComplete)
saveScrollPositionAndViewStateToItem(m_previousItem.get());
// When traversing history, we may end up redirecting to a different URL
// this time (e.g., due to cookies). See http://webkit.org/b/49654.
updateCurrentItem();
}
// The general idea here is to traverse the frame tree and the item tree in parallel,
// tracking whether each frame already has the content the item requests. If there is
// a match (by URL), we just restore scroll position and recurse. Otherwise we must
// reload that frame, and all its kids.
void HistoryController::recursiveGoToItem(HistoryItem* item, HistoryItem* fromItem, FrameLoadType type)
{
ASSERT(item);
ASSERT(fromItem);
KURL itemURL = item->url();
KURL currentURL;
if (m_frame->loader()->documentLoader())
currentURL = m_frame->loader()->documentLoader()->url();
// Always reload the target frame of the item we're going to. This ensures that we will
// do -some- load for the transition, which means a proper notification will be posted
// to the app.
// The exact URL has to match, including fragment. We want to go through the _load
// method, even if to do a within-page navigation.
// The current frame tree and the frame tree snapshot in the item have to match.
if (!item->isTargetItem() &&
itemURL == currentURL &&
((m_frame->tree()->name().isEmpty() && item->target().isEmpty()) || m_frame->tree()->name() == item->target()) &&
childFramesMatchItem(item))
{
// This content is good, so leave it alone and look for children that need reloading
// Save form state (works from currentItem, since prevItem is nil)
ASSERT(!m_previousItem);
saveDocumentState();
saveScrollPositionAndViewStateToItem(m_currentItem.get());
if (FrameView* view = m_frame->view())
view->setWasScrolledByUser(false);
m_currentItem = item;
// Restore form state (works from currentItem)
restoreDocumentState();
// Restore the scroll position (we choose to do this rather than going back to the anchor point)
restoreScrollPositionAndViewState();
const HistoryItemVector& childItems = item->children();
int size = childItems.size();
for (int i = 0; i < size; ++i) {
String childFrameName = childItems[i]->target();
HistoryItem* fromChildItem = fromItem->childItemWithTarget(childFrameName);
ASSERT(fromChildItem || fromItem->isTargetItem());
Frame* childFrame = m_frame->tree()->child(childFrameName);
ASSERT(childFrame);
childFrame->loader()->history()->recursiveGoToItem(childItems[i].get(), fromChildItem, type);
}
} else {
m_frame->loader()->loadItem(item, type);
}
}
void HistoryController::updateForBackForwardNavigation()
{
#if !LOG_DISABLED
LOG(History, "WebCoreHistory: Updating History for back/forward navigation in frame %s", m_frame->document()->title().utf8().data());
#endif
saveScrollPositionAndViewStateToItem(m_previousItem.get());
// When traversing history, we may end up redirecting to a different URL
// this time (e.g., due to cookies). See http://webkit.org/b/49654.
updateCurrentItem();
}
// The general idea here is to traverse the frame tree and the item tree in parallel,
// tracking whether each frame already has the content the item requests. If there is
// a match (by URL), we just restore scroll position and recurse. Otherwise we must
// reload that frame, and all its kids.
void HistoryController::recursiveGoToItem(HistoryItem* item, HistoryItem* fromItem, FrameLoadType type)
{
ASSERT(item);
ASSERT(fromItem);
// If the item we're going to is a clone of the item we're at, then do
// not load it again, and continue history traversal to its children.
// The current frame tree and the frame tree snapshot in the item have
// to match.
// Note: If item and fromItem are the same, then we need to create a new
// document.
if (item != fromItem
&& item->itemSequenceNumber() == fromItem->itemSequenceNumber()
&& currentFramesMatchItem(item)
&& fromItem->hasSameFrames(item))
{
// This content is good, so leave it alone and look for children that need reloading
// Save form state (works from currentItem, since m_frameLoadComplete is true)
ASSERT(m_frameLoadComplete);
saveDocumentState();
saveScrollPositionAndViewStateToItem(m_currentItem.get());
if (FrameView* view = m_frame->view())
view->setWasScrolledByUser(false);
m_previousItem = m_currentItem;
m_currentItem = item;
// Restore form state (works from currentItem)
restoreDocumentState();
// Restore the scroll position (we choose to do this rather than going back to the anchor point)
restoreScrollPositionAndViewState();
const HistoryItemVector& childItems = item->children();
int size = childItems.size();
for (int i = 0; i < size; ++i) {
String childFrameName = childItems[i]->target();
HistoryItem* fromChildItem = fromItem->childItemWithTarget(childFrameName);
ASSERT(fromChildItem);
Frame* childFrame = m_frame->tree()->child(childFrameName);
ASSERT(childFrame);
childFrame->loader()->history()->recursiveGoToItem(childItems[i].get(), fromChildItem, type);
}
} else {
m_frame->loader()->loadItem(item, type);
}
}
void HistoryController::updateForBackForwardNavigation()
{
#if !LOG_DISABLED
if (m_frame.loader().documentLoader())
LOG(History, "WebCoreHistory: Updating History for back/forward navigation in frame %s", m_frame.loader().documentLoader()->title().string().utf8().data());
#endif
// Must grab the current scroll position before disturbing it
if (!m_frameLoadComplete)
saveScrollPositionAndViewStateToItem(m_previousItem.get());
// When traversing history, we may end up redirecting to a different URL
// this time (e.g., due to cookies). See http://webkit.org/b/49654.
updateCurrentItem();
}
void HistoryController::updateForReload()
{
#if !LOG_DISABLED
LOG(History, "WebCoreHistory: Updating History for reload in frame %s", m_frame->document()->title().utf8().data());
#endif
if (m_currentItem) {
if (m_frame->loader()->loadType() == FrameLoadTypeReload || m_frame->loader()->loadType() == FrameLoadTypeReloadFromOrigin)
saveScrollPositionAndViewStateToItem(m_currentItem.get());
}
// When reloading the page, we may end up redirecting to a different URL
// this time (e.g., due to cookies). See http://webkit.org/b/4072.
updateCurrentItem();
}
void HistoryController::updateForReload()
{
#if !LOG_DISABLED
if (m_frame->loader()->documentLoader())
LOG(History, "WebCoreHistory: Updating History for reload in frame %s", m_frame->loader()->documentLoader()->title().utf8().data());
#endif
if (m_currentItem) {
pageCache()->remove(m_currentItem.get());
if (m_frame->loader()->loadType() == FrameLoadTypeReload || m_frame->loader()->loadType() == FrameLoadTypeReloadFromOrigin)
saveScrollPositionAndViewStateToItem(m_currentItem.get());
// Sometimes loading a page again leads to a different result because of cookies. Bugzilla 4072
if (m_frame->loader()->documentLoader()->unreachableURL().isEmpty())
m_currentItem->setURL(m_frame->loader()->documentLoader()->requestURL());
}
}
void HistoryController::updateForReload()
{
LOG(History, "HistoryController %p updateForBackForwardNavigation: Updating History for reload in frame %p (main frame %d) %s", this, &m_frame, m_frame.isMainFrame(), m_frame.loader().documentLoader() ? m_frame.loader().documentLoader()->url().string().utf8().data() : "");
if (m_currentItem) {
PageCache::singleton().remove(*m_currentItem);
if (m_frame.loader().loadType() == FrameLoadType::Reload || m_frame.loader().loadType() == FrameLoadType::ReloadFromOrigin)
saveScrollPositionAndViewStateToItem(m_currentItem.get());
// Rebuild the history item tree when reloading as trying to re-associate everything is too error-prone.
m_currentItem->clearChildren();
}
// When reloading the page, we may end up redirecting to a different URL
// this time (e.g., due to cookies). See http://webkit.org/b/4072.
updateCurrentItem();
}
void HistoryController::updateForReload()
{
#if !LOG_DISABLED
if (m_frame.loader().documentLoader())
LOG(History, "WebCoreHistory: Updating History for reload in frame %s", m_frame.loader().documentLoader()->title().string().utf8().data());
#endif
if (m_currentItem) {
PageCache::singleton().remove(*m_currentItem);
if (m_frame.loader().loadType() == FrameLoadType::Reload || m_frame.loader().loadType() == FrameLoadType::ReloadFromOrigin)
saveScrollPositionAndViewStateToItem(m_currentItem.get());
// Rebuild the history item tree when reloading as trying to re-associate everything is too error-prone.
m_currentItem->clearChildren();
}
// When reloading the page, we may end up redirecting to a different URL
// this time (e.g., due to cookies). See http://webkit.org/b/4072.
updateCurrentItem();
}
PassRefPtr<HistoryItem> HistoryController::createItemTree(Frame* targetFrame, bool clipAtTarget)
{
RefPtr<HistoryItem> bfItem = createItem(m_frame->tree()->parent() ? true : false);
if (m_previousItem)
saveScrollPositionAndViewStateToItem(m_previousItem.get());
if (!(clipAtTarget && m_frame == targetFrame)) {
// save frame state for items that aren't loading (khtml doesn't save those)
saveDocumentState();
for (Frame* child = m_frame->tree()->firstChild(); child; child = child->tree()->nextSibling()) {
FrameLoader* childLoader = child->loader();
bool hasChildLoaded = childLoader->frameHasLoaded();
// If the child is a frame corresponding to an <object> element that never loaded,
// we don't want to create a history item, because that causes fallback content
// to be ignored on reload.
if (!(!hasChildLoaded && childLoader->isHostedByObjectElement()))
bfItem->addChildItem(childLoader->history()->createItemTree(targetFrame, clipAtTarget));
}
}
if (m_frame == targetFrame)
bfItem->setIsTargetItem(true);
return bfItem;
}