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OpenBoard/src/web/browser/WBWebTrapWebView.cpp

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/*
13 years ago
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
13 years ago
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "WBWebTrapWebView.h"
#include <QtGui>
#include <QtWebKit>
#include "web/UBWebKitUtils.h"
#include "core/UBApplication.h"
#include "core/UBApplicationController.h"
#include "board/UBBoardController.h"
WBWebTrapWebView::WBWebTrapWebView(QWidget* parent)
: QWebView(parent)
, mCurrentContentType(Unknown)
, mIsTrapping(false)
, mTrapingWidget(0)
{
connect(this, SIGNAL(loadFinished ( bool)), this, SLOT(viewLoadFinished(bool)));
}
WBWebTrapWebView::~WBWebTrapWebView()
{
delete mTrapingWidget;
}
void WBWebTrapWebView::setIsTrapping(bool pIsTrapping)
{
mIsTrapping = pIsTrapping;
mDomElementRect = QRect();
mCurrentContentType = Unknown;
/*
#if defined(Q_WS_WIN)
if(mIsTrapping)
{
if (!mTrapingWidget)
{
mTrapingWidget = new UBWebTrapMouseEventMask(this);
mTrapingWidget->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
mTrapingWidget->setAttribute(Qt::WA_TranslucentBackground, true);
}
QPoint topLeft = mapToGlobal (geometry().topLeft());
QRect geom(topLeft.x(), topLeft.y(), geometry().width(), geometry().height());
mTrapingWidget->setGeometry(geom);
mTrapingWidget->setVisible(true);
}
else if (mTrapingWidget)
{
mTrapingWidget->setVisible(false);
}
#endif
*/
update();
}
void WBWebTrapWebView::hideEvent ( QHideEvent * event )
{
setIsTrapping(false);
QWebView::hideEvent(event);
}
void WBWebTrapWebView::highliteElementAtPos ( const QPoint& pos)
{
mCurrentContentType = Unknown;
if(page() && page()->currentFrame())
{
QWebHitTestResult htr = page()->currentFrame()->hitTestContent (pos);
QRect pageHtr = htr.boundingRect().translated(htr.frame()->pos());
QRect updateRect = mWebViewElementRect.united(pageHtr);
updateRect = updateRect.adjusted(-8, -8, 8, 8);
mDomElementRect = htr.boundingRect();
if (!htr.pixmap().isNull())
{
mCurrentContentType = Image;
qDebug() << "found pixmap at " << htr.boundingRect();
}
else
{
QWebElement element = htr.element();
QString tagName = element.tagName().toLower();
if (tagName == "object"
|| tagName == "embed")
{
mCurrentContentType = ObjectOrEmbed;
}
else if ((tagName == "input") || (tagName == "textarea"))
{
QString ec = potentialEmbedCodeAtPos(pos);
if (ec.length() > 0)
{
qDebug() << "found input data \n\n" << ec;
mCurrentContentType = Input;
}
}
else
{
QString tagName = htr.element().tagName();
QString id = htr.element().attribute("id", "");
QWebElement el = htr.element();
QString idSelector = tagName + "#" + id;
bool idSuccess = (el == el.document().findFirst(idSelector));
if (idSuccess)
{
mElementQuery = idSelector;
mCurrentContentType = ElementByQuery;
}
else
{
//bool isValid = true;
QWebElement elParent = el.parent();
QWebElement currentEl = el;
QString path = tagName;
QStringList pathElements;
do
{
QWebElement someSibling = elParent.firstChild();
int index = 0;
bool foundIndex = false;
do
{
if (someSibling.tagName() == currentEl.tagName())
{
if (someSibling == currentEl)
{
foundIndex = true;
}
else
index++;
}
someSibling = someSibling.nextSibling();
}
while(!someSibling.isNull() && !foundIndex);
QString part;
if (index > 0)
part = QString("%1:nth-child(%2)").arg(currentEl.tagName()).arg(index);
else
part = currentEl.tagName();
pathElements.insert(0, part);
currentEl = elParent;
elParent = elParent.parent();
} while(!elParent.isNull());
//QString idSelector = tagName + "#" + id;
QString treeSelector = pathElements.join(" > ");
mElementQuery = treeSelector;
mCurrentContentType = ElementByQuery;
//bool treeSuccess = (el == el.document().findFirst(treeSelector));
//qDebug() << "----------------------------";
//qDebug() << idSuccess << idSelector;
//qDebug() << treeSuccess << treeSelector;
}
}
}
update(updateRect);
}
}
QString WBWebTrapWebView::potentialEmbedCodeAtPos(const QPoint& pos)
{
QString scr = QString("document.elementFromPoint(%1, %2).tagName")
.arg(pos.x())
.arg(pos.y());
QVariant tagNameVar = page()->currentFrame()->evaluateJavaScript(scr);
QString tagName = tagNameVar.toString().toLower();
if ((tagName == "input") || (tagName == "textarea"))
{
QString valueScript;
if (tagName == "input")
{
valueScript = QString("document.elementFromPoint(%1, %2).value")
.arg(pos.x())
.arg(pos.y());
}
else if (tagName == "textarea")
{
valueScript = QString("document.elementFromPoint(%1, %2).innerHTML")
.arg(pos.x())
.arg(pos.y());
}
QVariant valueVar = page()->currentFrame()->evaluateJavaScript(valueScript);
QString value = valueVar.toString();
if (value.length() > 0 && value.contains("width") && value.contains("height"))
{
return value;
}
}
return "";
}
void WBWebTrapWebView::trapElementAtPos(const QPoint& pos)
{
QWebHitTestResult htr = page()->currentFrame()->hitTestContent(pos);
if (!htr.pixmap().isNull())
{
emit pixmapCaptured(htr.pixmap(), false);
}
else if (mCurrentContentType == ObjectOrEmbed)
{
QString embedSelector = QString("document.elementFromPoint(%1, %2)").arg(pos.x()).arg(pos.y());
QVariant tagName = page()->currentFrame()->evaluateJavaScript(embedSelector + ".tagName");
QVariant innerHTML = page()->currentFrame()->evaluateJavaScript(embedSelector + ".innerHTML");
qDebug() << "innerHTML" << innerHTML;
if (tagName.toString().toLower() == "object")
{
embedSelector = QString("document.elementFromPoint(%1, %2).getElementsByTagName('object')[0]")
.arg(pos.x()).arg(pos.y());
}
QString querySource = embedSelector + ".src";
QVariant resSource = page()->currentFrame()->evaluateJavaScript(querySource);
qDebug() << "resSource" << resSource;
QString source = resSource.toString();
QString queryType = embedSelector + ".type";
QVariant resType = page()->currentFrame()->evaluateJavaScript(queryType);
QString type = resType.toString();
qDebug() << "resType" << resType;
if (source.trimmed().length() > 0)
{
emit objectCaptured(QUrl(page()->currentFrame()->url().toString() + "/" + source), type,
htr.boundingRect().width(), htr.boundingRect().height());
UBApplication::boardController->downloadURL(QUrl(source), QPointF(0.0, 0.0));
UBApplication::applicationController->showBoard();
}
}
else if (mCurrentContentType == Input)
{
QString embedCode = potentialEmbedCodeAtPos(pos);
if (embedCode.length() > 0)
{
emit embedCodeCaptured(embedCode);
}
}
else if (mCurrentContentType == ElementByQuery)
{
webElementCaptured(page()->currentFrame()->url(), mElementQuery);
}
}
void WBWebTrapWebView::mouseMoveEvent ( QMouseEvent * event )
{
if (mIsTrapping)
{
highliteElementAtPos(event->pos());
}
else
{
QWebView::mouseMoveEvent(event);
}
}
void WBWebTrapWebView::mousePressEvent(QMouseEvent* event)
{
if (mIsTrapping)
{
// NOOP - avoid event routing to web kit (accept is not enough)
}
else
{
QWebView::mousePressEvent(event);
}
}
void WBWebTrapWebView::mouseReleaseEvent ( QMouseEvent * event )
{
//bool eventConsumed = false;
//qDebug() << "mouse release" << event->pos();
if (mIsTrapping)
{
trapElementAtPos(event->pos());
}
else
{
QWebView::mouseReleaseEvent(event);
}
//if (!eventConsumed)
/*
QString script;
script += QString("var element = document.elementFromPoint(%1, %2);").arg(event->pos().x()).arg(event->pos().y());
script += "var path = '';";
script += "var currentNode = element;";
script += "while(currentNode){";
script += " if (currentNode.nodeType == Node.ELEMENT_NODE){";
script += " var tn = currentNode.tagName;";
script += " var elp = currentNode.parentNode;";
script += " var index = -1;";
script += " if(elp){";
script += " for(i = 0; i < elp.childNodes.length; i++){";
script += " var node = elp.childNodes[i];";
script += " if(node.nodeType == Node.ELEMENT_NODE && node.tagName == tn){";
script += " index++;";
script += " }";
script += " if(node == currentNode){";
script += " break;";
script += " }";
script += " }";
script += " }";
script += " path = tn + '[' + index + '] > ' + path;";
script += " }";
script += " currentNode = currentNode.parentNode;";
script += "}";
script += "'id: ' + element.id + ', TagName: ' + element.tagName + ', at: ' + path;";
QVariant result = page()->currentFrame()->evaluateJavaScript(script);
qDebug() << result.isValid() << result.toString();
*/
//if (result.isValid())
//{
//emit trapped(url(), result.toString());
//}
}
void WBWebTrapWebView::paintEvent ( QPaintEvent * event )
{
QWebView::paintEvent(event);
if (mIsTrapping && mDomElementRect.isValid()
&& page() && page()->currentFrame())
{
QPainter p(this);
QPen pen;
if (mCurrentContentType != Unknown)
pen = QPen(QColor(0, 255, 0, 127));
//else if (mCurrentContentType == ObjectOrEmbed)
// pen = QPen(QColor(0, 0, 255, 127));
//else if (mCurrentContentType == Input)
// pen = QPen(QColor(0, 0, 255, 127));
else
pen = QPen(QColor(255, 0, 0, 127));
pen.setJoinStyle(Qt::RoundJoin);
pen.setWidth(8);
p.setPen(pen);
QPoint scrollPosition = page()->currentFrame()->scrollPosition();
QRect webViewPosition = mDomElementRect;
webViewPosition.translate(-scrollPosition);
mWebViewElementRect = webViewPosition.adjusted(-4, -4, 4, 4);
p.drawRect(mWebViewElementRect);
//pen.setColor(Qt::black);
//p.setPen(pen);
//p.drawText(mDomElementRect.adjusted(8, 8, -8, -8), mElementID);
}
}
void WBWebTrapWebView::viewLoadFinished ( bool ok )
{
Q_UNUSED(ok);
}
UBWebTrapMouseEventMask::UBWebTrapMouseEventMask(WBWebTrapWebView* pWebView)
: mTrappedWebView(pWebView)
{
setMouseTracking(true);
}
UBWebTrapMouseEventMask::~UBWebTrapMouseEventMask()
{
// NOOP
}
void UBWebTrapMouseEventMask::mousePressEvent(QMouseEvent* event)
{
if (mTrappedWebView && mTrappedWebView->isTrapping())
{
// NOOP
}
else
{
QWidget::mousePressEvent(event);
}
}
void UBWebTrapMouseEventMask::mouseMoveEvent ( QMouseEvent * event )
{
if (mTrappedWebView && mTrappedWebView->isTrapping())
{
mTrappedWebView->highliteElementAtPos(event->pos());
}
else
{
QWidget::mouseMoveEvent(event);
}
}
void UBWebTrapMouseEventMask::mouseReleaseEvent ( QMouseEvent * event )
{
if (mTrappedWebView && mTrappedWebView->isTrapping())
{
mTrappedWebView->trapElementAtPos(event->pos());
}
else
{
QWidget::mouseReleaseEvent(event);
}
}
void UBWebTrapMouseEventMask::paintEvent(QPaintEvent *)
{
QPainter painter(this);
//painter.setRenderHint(QPainter::Antialiasing);
painter.setPen(Qt::NoPen);
painter.setBrush(QColor(127, 127, 127, 15));
painter.drawRect(0, 0, width(), height());
}