BackForwardController.cpp [plain text]
#include "config.h"
#include "BackForwardController.h"
#include "BackForwardClient.h"
#include "HistoryItem.h"
#include "Page.h"
#include "ShouldTreatAsContinuingLoad.h"
namespace WebCore {
BackForwardController::BackForwardController(Page& page, Ref<BackForwardClient>&& client)
: m_page(page)
, m_client(WTFMove(client))
{
}
BackForwardController::~BackForwardController() = default;
RefPtr<HistoryItem> BackForwardController::backItem()
{
return itemAtIndex(-1);
}
RefPtr<HistoryItem> BackForwardController::currentItem()
{
return itemAtIndex(0);
}
RefPtr<HistoryItem> BackForwardController::forwardItem()
{
return itemAtIndex(1);
}
bool BackForwardController::canGoBackOrForward(int distance) const
{
if (!distance)
return true;
if (distance > 0 && static_cast<unsigned>(distance) <= forwardCount())
return true;
if (distance < 0 && static_cast<unsigned>(-distance) <= backCount())
return true;
return false;
}
void BackForwardController::goBackOrForward(int distance)
{
if (!distance)
return;
auto historyItem = itemAtIndex(distance);
if (!historyItem) {
if (distance > 0) {
if (int forwardCount = this->forwardCount())
historyItem = itemAtIndex(forwardCount);
} else {
if (int backCount = this->backCount())
historyItem = itemAtIndex(-backCount);
}
}
if (!historyItem)
return;
m_page.goToItem(*historyItem, FrameLoadType::IndexedBackForward, ShouldTreatAsContinuingLoad::No);
}
bool BackForwardController::goBack()
{
auto historyItem = backItem();
if (!historyItem)
return false;
m_page.goToItem(*historyItem, FrameLoadType::Back, ShouldTreatAsContinuingLoad::No);
return true;
}
bool BackForwardController::goForward()
{
auto historyItem = forwardItem();
if (!historyItem)
return false;
m_page.goToItem(*historyItem, FrameLoadType::Forward, ShouldTreatAsContinuingLoad::No);
return true;
}
void BackForwardController::addItem(Ref<HistoryItem>&& item)
{
m_client->addItem(WTFMove(item));
}
void BackForwardController::setCurrentItem(HistoryItem& item)
{
m_client->goToItem(item);
}
unsigned BackForwardController::count() const
{
return m_client->backListCount() + 1 + m_client->forwardListCount();
}
unsigned BackForwardController::backCount() const
{
return m_client->backListCount();
}
unsigned BackForwardController::forwardCount() const
{
return m_client->forwardListCount();
}
RefPtr<HistoryItem> BackForwardController::itemAtIndex(int i)
{
return m_client->itemAtIndex(i);
}
void BackForwardController::close()
{
m_client->close();
}
}