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/*
* ScrollKeeper.cpp
*
* Created on: 30 Oct 2016
* Author: rkfg
*/
#include "ScrollKeeper.h"
#ifdef HAVE_WEBKIT
#include <QWebFrame>
#include <QWebView>
#endif
#ifdef HAVE_WEBENGINE
#include <QWebEnginePage>
#endif
#include <QScrollBar>
//#define SCROLL_DEBUG
ScrollKeeper::ScrollKeeper(QWidget* chatView) :
chatView_(chatView),
scrollPos_(0),
scrollToEnd_(false),
ted_(0)
#ifdef HAVE_WEBKIT
,mainFrame_(0)
#endif
{
Q_UNUSED(chatView_)
ted_ = qobject_cast<QTextEdit*>(chatView);
if (ted_) {
scrollPos_ = ted_->verticalScrollBar()->value();
if (scrollPos_ == ted_->verticalScrollBar()->maximum()) {
scrollToEnd_ = true;
}
#ifdef SCROLL_DEBUG
qDebug() << "QTED Scroll pos:" << scrollPos_ << "to end:" << scrollToEnd_ << "max:"
<< ted_->verticalScrollBar()->maximum();
#endif
}
else {
#ifdef HAVE_WEBKIT
QWebView* wv = qobject_cast<QWebView*>(chatView);
if (!wv) {
return;
}
mainFrame_ = wv->page()->mainFrame();
scrollPos_ = mainFrame_->scrollBarValue(Qt::Vertical);
if (scrollPos_ == mainFrame_->scrollBarMaximum(Qt::Vertical)) {
scrollToEnd_ = true;
}
#ifdef SCROLL_DEBUG
qDebug() << "QWV Scroll pos:" << scrollPos_ << "to end:" << scrollToEnd_ << "max:"
<< mainFrame_->scrollBarMaximum(Qt::Vertical) << "min:" << mainFrame_->scrollBarMinimum(Qt::Vertical);
#endif
#endif
#ifdef HAVE_WEBENGINE
#ifdef __GNUC__
#warning "ImagePreviewPlugin TODO: add support for webengine"
#endif
#endif
}
}
ScrollKeeper::~ScrollKeeper() {
if (ted_) {
#ifdef SCROLL_DEBUG
qDebug() << "QTED restoring scroll pos:" << scrollPos_ << "to end:" << scrollToEnd_ << "max:"
<< ted_->verticalScrollBar()->maximum();
#endif
ted_->verticalScrollBar()->setValue(scrollToEnd_ ? ted_->verticalScrollBar()->maximum() : scrollPos_);
}
#ifdef HAVE_WEBKIT
if (mainFrame_) {
#ifdef SCROLL_DEBUG
qDebug() << "QWV restoring scroll pos:" << scrollPos_ << "to end:" << scrollToEnd_ << "max:"
<< mainFrame_->scrollBarMaximum(Qt::Vertical);
#endif
mainFrame_->setScrollBarValue(Qt::Vertical, scrollToEnd_ ? mainFrame_->scrollBarMaximum(Qt::Vertical) : scrollPos_);
}
#endif
}
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