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webpage.cpp
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webpage.cpp
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/*
* Copyright 2009 Benjamin C. Meyer <ben@meyerhome.net>
* Copyright 2009 Jakub Wieczorek <faw217@gmail.com>
*
* 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 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "webpage.h"
#include "browserapplication.h"
#include "downloadmanager.h"
#include "historymanager.h"
#include "networkaccessmanager.h"
#include "opensearchengine.h"
#include "opensearchmanager.h"
#include "tabwidget.h"
#include "toolbarsearch.h"
#include "webpluginfactory.h"
#include "webview.h"
#include <qbuffer.h>
#include <qdesktopservices.h>
#include <qmessagebox.h>
#include <qnetworkreply.h>
#include <qnetworkrequest.h>
#include <qpainter.h>
#include <qsettings.h>
#include <qwebframe.h>
#if QT_VERSION >= 0x040600 || defined(WEBKIT_TRUNK)
#include <qwebelement.h>
#endif
WebPluginFactory *WebPage::s_webPluginFactory = 0;
QString WebPage::s_userAgent;
JavaScriptExternalObject::JavaScriptExternalObject(QObject *parent)
: QObject(parent)
{
}
void JavaScriptExternalObject::AddSearchProvider(const QString &url)
{
ToolbarSearch::openSearchManager()->addEngine(QUrl(url));
}
Q_DECLARE_METATYPE(OpenSearchEngine*)
JavaScriptAroraObject::JavaScriptAroraObject(QObject *parent)
: QObject(parent)
{
static const char *translations[] = {
QT_TR_NOOP("Welcome to Arora!"),
QT_TR_NOOP("Arora Start"),
QT_TR_NOOP("Search!"),
QT_TR_NOOP("Search results provided by"),
QT_TR_NOOP("About Arora")
};
Q_UNUSED(translations);
qRegisterMetaType<OpenSearchEngine*>("OpenSearchEngine*");
}
QString JavaScriptAroraObject::translate(const QString &string)
{
QString translatedString = trUtf8(string.toUtf8().constData());
// If the translation is the same as the original string
// it could not be translated. In that case
// try to translate using the QApplication domain
if (translatedString != string)
return translatedString;
else
return qApp->trUtf8(string.toUtf8().constData());
}
QObject *JavaScriptAroraObject::currentEngine() const
{
return ToolbarSearch::openSearchManager()->currentEngine();
}
QString JavaScriptAroraObject::searchUrl(const QString &string) const
{
return QString::fromUtf8(ToolbarSearch::openSearchManager()->currentEngine()->searchUrl(string).toEncoded());
}
WebPage::WebPage(QObject *parent)
: WebPageProxy(parent)
, m_openTargetBlankLinksIn(TabWidget::NewWindow)
, m_javaScriptExternalObject(0)
, m_javaScriptAroraObject(0)
{
setPluginFactory(webPluginFactory());
NetworkAccessManagerProxy *networkManagerProxy = new NetworkAccessManagerProxy(this);
networkManagerProxy->setWebPage(this);
networkManagerProxy->setPrimaryNetworkAccessManager(BrowserApplication::networkAccessManager());
setNetworkAccessManager(networkManagerProxy);
connect(this, SIGNAL(unsupportedContent(QNetworkReply *)),
this, SLOT(handleUnsupportedContent(QNetworkReply *)));
connect(this, SIGNAL(frameCreated(QWebFrame *)),
this, SLOT(addExternalBinding(QWebFrame *)));
addExternalBinding(mainFrame());
loadSettings();
}
WebPage::~WebPage()
{
setNetworkAccessManager(0);
}
WebPluginFactory *WebPage::webPluginFactory()
{
if (!s_webPluginFactory)
s_webPluginFactory = new WebPluginFactory(BrowserApplication::instance());
return s_webPluginFactory;
}
QList<WebPageLinkedResource> WebPage::linkedResources(const QString &relation)
{
QList<WebPageLinkedResource> resources;
#if QT_VERSION >= 0x040600 || defined(WEBKIT_TRUNK)
QUrl baseUrl = mainFrame()->baseUrl();
QWebElementCollection linkElements = mainFrame()->findAllElements(QLatin1String("html > head > link"));
foreach (const QWebElement &linkElement, linkElements) {
QString rel = linkElement.attribute(QLatin1String("rel"));
QString href = linkElement.attribute(QLatin1String("href"));
QString type = linkElement.attribute(QLatin1String("type"));
QString title = linkElement.attribute(QLatin1String("title"));
if (href.isEmpty() || type.isEmpty())
continue;
if (!relation.isEmpty() && rel != relation)
continue;
WebPageLinkedResource resource;
resource.rel = rel;
resource.type = type;
resource.href = baseUrl.resolved(QUrl::fromEncoded(href.toUtf8()));
resource.title = title;
resources.append(resource);
}
#else
QString baseUrlString = mainFrame()->evaluateJavaScript(QLatin1String("document.baseURI")).toString();
QUrl baseUrl = QUrl::fromEncoded(baseUrlString.toUtf8());
QFile file(QLatin1String(":fetchLinks.js"));
if (!file.open(QFile::ReadOnly))
return resources;
QString script = QString::fromUtf8(file.readAll());
QVariantList list = mainFrame()->evaluateJavaScript(script).toList();
foreach (const QVariant &variant, list) {
QVariantMap map = variant.toMap();
QString rel = map[QLatin1String("rel")].toString();
QString type = map[QLatin1String("type")].toString();
QString href = map[QLatin1String("href")].toString();
QString title = map[QLatin1String("title")].toString();
if (href.isEmpty() || type.isEmpty())
continue;
if (!relation.isEmpty() && rel != relation)
continue;
WebPageLinkedResource resource;
resource.rel = rel;
resource.type = type;
resource.href = baseUrl.resolved(QUrl::fromEncoded(href.toUtf8()));
resource.title = title;
resources.append(resource);
}
#endif
return resources;
}
void WebPage::populateNetworkRequest(QNetworkRequest &request)
{
if (request == lastRequest) {
request.setAttribute((QNetworkRequest::Attribute)(pageAttributeId() + 1), lastRequestType);
}
WebPageProxy::populateNetworkRequest(request);
}
void WebPage::addExternalBinding(QWebFrame *frame)
{
#if QT_VERSION < 0x040600
QWebSettings *defaultSettings = QWebSettings::globalSettings();
if (!defaultSettings->testAttribute(QWebSettings::JavascriptEnabled))
return;
#endif
if (!m_javaScriptExternalObject)
m_javaScriptExternalObject = new JavaScriptExternalObject(this);
if (frame == 0) { // called from QWebFrame::javaScriptWindowObjectCleared
frame = qobject_cast<QWebFrame*>(sender());
if (frame->url().scheme() == QLatin1String("qrc")
&& frame->url().path() == QLatin1String("/startpage.html")) {
if (!m_javaScriptAroraObject)
m_javaScriptAroraObject = new JavaScriptAroraObject(this);
frame->addToJavaScriptWindowObject(QLatin1String("arora"), m_javaScriptAroraObject);
}
} else { // called from QWebPage::frameCreated
connect(frame, SIGNAL(javaScriptWindowObjectCleared()),
this, SLOT(addExternalBinding()));
}
frame->addToJavaScriptWindowObject(QLatin1String("external"), m_javaScriptExternalObject);
}
QString WebPage::userAgent()
{
return s_userAgent;
}
void WebPage::setUserAgent(const QString &userAgent)
{
if (userAgent == s_userAgent)
return;
QSettings settings;
if (userAgent.isEmpty()) {
settings.remove(QLatin1String("userAgent"));
} else {
settings.setValue(QLatin1String("userAgent"), userAgent);
}
s_userAgent = userAgent;
}
QString WebPage::userAgentForUrl(const QUrl &url) const
{
if (s_userAgent.isEmpty())
s_userAgent = QWebPage::userAgentForUrl(url);
return s_userAgent;
}
bool WebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request,
NavigationType type)
{
lastRequest = request;
lastRequestType = type;
QString scheme = request.url().scheme();
if (scheme == QLatin1String("mailto")
|| scheme == QLatin1String("ftp")) {
BrowserApplication::instance()->askDesktopToOpenUrl(request.url());
return false;
}
if (type == QWebPage::NavigationTypeFormResubmitted) {
QMessageBox::StandardButton button = QMessageBox::warning(view(), tr("Resending POST request"),
tr("In order to display the site, the request along with all the data must be sent once again, "
"which may lead to some unexpected behaviour of the site e.g. the same action might be "
"performed once again. Do you want to continue anyway?"), QMessageBox::Yes | QMessageBox::No);
if (button != QMessageBox::Yes)
return false;
}
TabWidget::OpenUrlIn openIn = frame ? TabWidget::CurrentTab : TabWidget::NewWindow;
openIn = TabWidget::modifyWithUserBehavior(openIn);
// handle the case where we want to do something different then
// what qwebpage would do
if (openIn == TabWidget::NewSelectedTab
|| openIn == TabWidget::NewNotSelectedTab
|| (frame && openIn == TabWidget::NewWindow)) {
if (WebView *webView = qobject_cast<WebView*>(view())) {
TabWidget *tabWidget = webView->tabWidget();
if (tabWidget) {
WebView *newView = tabWidget->getView(openIn, webView);
QWebPage *page = 0;
if (newView)
page = newView->page();
if (page && page->mainFrame())
page->mainFrame()->load(request);
}
}
return false;
}
bool accepted = QWebPage::acceptNavigationRequest(frame, request, type);
if (accepted && frame == mainFrame()) {
QString directory = QDesktopServices::storageLocation(QDesktopServices::DataLocation);
QImage image(viewportSize(), QImage::Format_ARGB32);
QPainter painter(&image);
mainFrame()->render(&painter);
painter.end();
QString filename = QString(QLatin1String("%1/%2.png"))
.arg(directory)
.arg(mainFrame()->url().toString().replace(QLatin1String("/"),QLatin1String("")));
image.save(filename);
WebView *webView = qobject_cast<WebView*>(view());
webView->addScreenShot(filename);
m_requestedUrl = request.url();
emit aboutToLoadUrl(request.url());
}
return accepted;
}
void WebPage::loadSettings()
{
QSettings settings;
settings.beginGroup(QLatin1String("tabs"));
m_openTargetBlankLinksIn = (TabWidget::OpenUrlIn)settings.value(QLatin1String("openTargetBlankLinksIn"),
TabWidget::NewSelectedTab).toInt();
settings.endGroup();
s_userAgent = settings.value(QLatin1String("userAgent")).toString();
}
QWebPage *WebPage::createWindow(QWebPage::WebWindowType type)
{
Q_UNUSED(type);
if (WebView *webView = qobject_cast<WebView*>(view())) {
TabWidget *tabWidget = webView->tabWidget();
if (tabWidget) {
TabWidget::OpenUrlIn openIn = m_openTargetBlankLinksIn;
openIn = TabWidget::modifyWithUserBehavior(openIn);
return tabWidget->getView(openIn, webView)->page();
}
}
return 0;
}
QObject *WebPage::createPlugin(const QString &classId, const QUrl &url,
const QStringList ¶mNames, const QStringList ¶mValues)
{
Q_UNUSED(classId);
Q_UNUSED(url);
Q_UNUSED(paramNames);
Q_UNUSED(paramValues);
#if !defined(QT_NO_UITOOLS)
QUiLoader loader;
return loader.createWidget(classId, view());
#else
return 0;
#endif
}
// The chromium guys have documented many examples of incompatibilities that
// different browsers have when they mime sniff.
// http://src.chromium.org/viewvc/chrome/trunk/src/net/base/mime_sniffer.cc
//
// All WebKit ports should share a common set of rules to sniff content.
// By having this here we are yet another browser that has different behavior :(
// But sadly QtWebKit does no sniffing at all so we are forced to do something.
static bool contentSniff(const QByteArray &data)
{
if (data.contains("<!doctype")
|| data.contains("<script")
|| data.contains("<html")
|| data.contains("<!--")
|| data.contains("<head")
|| data.contains("<iframe")
|| data.contains("<h1")
|| data.contains("<div")
|| data.contains("<font")
|| data.contains("<table")
|| data.contains("<a")
|| data.contains("<style")
|| data.contains("<title")
|| data.contains("<b")
|| data.contains("<body")
|| data.contains("<br")
|| data.contains("<p"))
return true;
return false;
}
void WebPage::handleUnsupportedContent(QNetworkReply *reply)
{
if (!reply)
return;
QUrl replyUrl = reply->url();
if (replyUrl.scheme() == QLatin1String("abp"))
return;
switch (reply->error()) {
case QNetworkReply::NoError:
if (reply->header(QNetworkRequest::ContentTypeHeader).isValid()) {
BrowserApplication::downloadManager()->handleUnsupportedContent(reply);
return;
}
break;
case QNetworkReply::ProtocolUnknownError: {
QSettings settings;
settings.beginGroup(QLatin1String("WebView"));
QStringList externalSchemes = settings.value(QLatin1String("externalSchemes")).toStringList();
if (externalSchemes.contains(replyUrl.scheme())) {
QDesktopServices::openUrl(replyUrl);
return;
}
break;
}
default:
break;
}
// Find the frame that has the unsupported content
if (replyUrl.isEmpty() || replyUrl != m_requestedUrl)
return;
QWebFrame *notFoundFrame = mainFrame();
if (!notFoundFrame)
return;
if (reply->header(QNetworkRequest::ContentTypeHeader).toString().isEmpty()) {
// do evil
QByteArray data = reply->readAll();
if (contentSniff(data)) {
notFoundFrame->setHtml(QLatin1String(data), replyUrl);
return;
}
}
// Generate translated not found error page with an image
QFile notFoundErrorFile(QLatin1String(":/notfound.html"));
if (!notFoundErrorFile.open(QIODevice::ReadOnly))
return;
QString title = tr("Error loading page: %1").arg(QString::fromUtf8(replyUrl.toEncoded()));
QString html = QLatin1String(notFoundErrorFile.readAll());
QPixmap pixmap = qApp->style()->standardIcon(QStyle::SP_MessageBoxWarning, 0, view()).pixmap(QSize(32, 32));
QBuffer imageBuffer;
imageBuffer.open(QBuffer::ReadWrite);
if (pixmap.save(&imageBuffer, "PNG")) {
html.replace(QLatin1String("IMAGE_BINARY_DATA_HERE"),
QLatin1String(imageBuffer.buffer().toBase64()));
}
html = html.arg(title,
reply->errorString(),
tr("When connecting to: %1.").arg(QString::fromUtf8(replyUrl.toEncoded())),
tr("Check the address for errors such as <b>ww</b>.arora-browser.org instead of <b>www</b>.arora-browser.org"),
tr("If the address is correct, try checking the network connection."),
tr("If your computer or network is protected by a firewall or proxy, make sure that the browser is permitted to access the network."));
notFoundFrame->setHtml(html, replyUrl);
// Don't put error pages to the history.
BrowserApplication::instance()->historyManager()->removeHistoryEntry(replyUrl, notFoundFrame->title());
}