mythuiwebbrowser.cpp

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#include "mythuiwebbrowser.h"
 
// c++
#include <algorithm>
#include <chrono> // for milliseconds
#include <thread> // for sleep_for
 
// qt
#include <QApplication>
#include <QWebFrame>
#include <QWebHistory>
#include <QPainter>
#include <QDir>
#include <QBuffer>
#include <QStyle>
#include <QKeyEvent>
#include <QDomDocument>
#include <QNetworkCookieJar>
#include <QNetworkConfiguration>
 
// libmythbase
#include "libmythbase/mythcorecontext.h"
#include "libmythbase/mythdb.h"
#include "libmythbase/mythdirs.h"
#include "libmythbase/mythdownloadmanager.h"
#include "libmythbase/mythlogging.h"
 
//libmythui
#include "mythpainter.h"
#include "mythimage.h"
#include "mythmainwindow.h"
#include "mythfontproperties.h"
#include "mythuihelper.h"
#include "mythdialogbox.h"
#include "mythprogressdialog.h"
#include "mythuiscrollbar.h"
 
struct MimeType
{
    QString m_mimeType;
    QString m_extension;
    bool    m_isVideo;
};
 
static const std::vector<MimeType> SupportedMimeTypes
{
    { "audio/mpeg3",                 "mp3",   false },
    { "audio/x-mpeg-3",              "mp3",   false },
    { "audio/mpeg",                  "mp2",   false },
    { "audio/x-mpeg",                "mp2",   false },
    { "audio/ogg",                   "ogg",   false },
    { "audio/ogg",                   "oga",   false },
    { "audio/flac",                  "flac",  false },
    { "audio/x-ms-wma",              "wma",   false },
    { "audio/wav",                   "wav",   false },
    { "audio/x-wav",                 "wav",   false },
    { "audio/ac3",                   "ac3",   false },
    { "audio/x-ac3",                 "ac3",   false },
    { "audio/x-oma",                 "oma",   false },
    { "audio/x-realaudio",           "ra",    false },
    { "audio/dts",                   "dts",   false },
    { "audio/x-dts",                 "dts",   false },
    { "audio/aac",                   "aac",   false },
    { "audio/x-aac",                 "aac",   false },
    { "audio/m4a",                   "m4a",   false },
    { "audio/x-m4a",                 "m4a",   false },
    { "video/mpeg",                  "mpg",   true },
    { "video/mpeg",                  "mpeg",  true },
    { "video/x-ms-wmv",              "wmv",   true },
    { "video/x-ms-wmv",              "avi",   true },
    { "application/x-troff-msvideo", "avi",   true },
    { "video/avi",                   "avi",   true },
    { "video/msvideo",               "avi",   true },
    { "video/x-msvideo",             "avi",   true }
};
 
QNetworkReply* MythNetworkAccessManager::createRequest(Operation op, const QNetworkRequest& req, QIODevice* outgoingData)
{
    QNetworkReply* reply = QNetworkAccessManager::createRequest(op, req, outgoingData);
    reply->ignoreSslErrors();
    return reply;
}
 
static MythNetworkAccessManager *networkManager = nullptr;
 
static void DestroyNetworkAccessManager(void)
{
    if (networkManager)
    {
        delete networkManager;
        networkManager = nullptr;
    }
}
 
static QNetworkAccessManager *GetNetworkAccessManager(void)
{
    if (networkManager)
        return networkManager;
 
    networkManager = new MythNetworkAccessManager();
//  This next line prevents seg fault at program exit in
//  QNetworkConfiguration::~QNetworkConfiguration()
//  when destructor is called by DestroyNetworkAccessManager
    networkManager->setConfiguration(networkManager->configuration());
    LOG(VB_GENERAL, LOG_DEBUG, "Copying DLManager's Cookie Jar");
    GetMythDownloadManager()->loadCookieJar(GetConfDir() + "/MythBrowser/cookiejar.txt");
    networkManager->setCookieJar(GetMythDownloadManager()->copyCookieJar());
 
    atexit(DestroyNetworkAccessManager);
 
    return networkManager;
}
 
BrowserApi::BrowserApi(QObject *parent)
           : QObject(parent)
{
    gCoreContext->addListener(this);
}
 
BrowserApi::~BrowserApi(void)
{
    gCoreContext->removeListener(this);
}
 
void BrowserApi::setWebView(QWebView *view)
{
    QWebPage *page = view->page();
    m_frame = page->mainFrame();
 
    attachObject();
    connect(m_frame, &QWebFrame::javaScriptWindowObjectCleared, this,
            &BrowserApi::attachObject);
}
 
void BrowserApi::attachObject(void)
{
    m_frame->addToJavaScriptWindowObject(QString("MusicPlayer"), this);
}
 
void BrowserApi::Play(void)
{
    MythEvent me(QString("MUSIC_COMMAND %1 PLAY").arg(gCoreContext->GetHostName()));
    gCoreContext->dispatch(me);
}
 
void BrowserApi::Stop(void)
{
    MythEvent me(QString("MUSIC_COMMAND %1 STOP").arg(gCoreContext->GetHostName()));
    gCoreContext->dispatch(me);
}
 
void BrowserApi::Pause(void)
{
    MythEvent me(QString("MUSIC_COMMAND %1 PAUSE %1").arg(gCoreContext->GetHostName()));
    gCoreContext->dispatch(me);
}
 
void BrowserApi::SetVolume(int volumn)
{
    MythEvent me(QString("MUSIC_COMMAND %1 SET_VOLUME %2")
                 .arg(gCoreContext->GetHostName()).arg(volumn));
    gCoreContext->dispatch(me);
}
 
int BrowserApi::GetVolume(void)
{
    m_gotAnswer = false;
 
    MythEvent me(QString("MUSIC_COMMAND %1 GET_VOLUME")
                 .arg(gCoreContext->GetHostName()));
    gCoreContext->dispatch(me);
 
    QElapsedTimer timer;
    timer.start();
 
    while (!timer.hasExpired(2000) && !m_gotAnswer)
    {
        QCoreApplication::processEvents();
        std::this_thread::sleep_for(10ms);
    }
 
    if (m_gotAnswer)
        return m_answer.toInt();
 
    return -1;
}
 
void BrowserApi::PlayFile(const QString& filename)
{
    MythEvent me(QString("MUSIC_COMMAND %1 PLAY_FILE '%2'")
                 .arg(gCoreContext->GetHostName(), filename));
    gCoreContext->dispatch(me);
}
 
void BrowserApi::PlayTrack(int trackID)
{
    MythEvent me(QString("MUSIC_COMMAND %1 PLAY_TRACK %2")
                 .arg(gCoreContext->GetHostName()).arg(trackID));
    gCoreContext->dispatch(me);
}
 
void BrowserApi::PlayURL(const QString& url)
{
    MythEvent me(QString("MUSIC_COMMAND %1 PLAY_URL %2")
                 .arg(gCoreContext->GetHostName(), url));
    gCoreContext->dispatch(me);
}
 
QString BrowserApi::GetMetadata(void)
{
    m_gotAnswer = false;
 
    MythEvent me(QString("MUSIC_COMMAND %1 GET_METADATA")
                 .arg(gCoreContext->GetHostName()));
    gCoreContext->dispatch(me);
 
    QElapsedTimer timer;
    timer.start();
 
    while (!timer.hasExpired(2000)  && !m_gotAnswer)
    {
        QCoreApplication::processEvents();
        std::this_thread::sleep_for(10ms);
    }
 
    if (m_gotAnswer)
        return m_answer;
 
    return {"unknown"};
}
 
void BrowserApi::customEvent(QEvent *e)
{
    if (e->type() == MythEvent::kMythEventMessage)
    {
        auto *me = dynamic_cast<MythEvent *>(e);
        if (me == nullptr)
            return;
 
        const QString& message = me->Message();
 
        if (!message.startsWith("MUSIC_CONTROL"))
            return;
 
        QStringList tokens = message.simplified().split(" ");
 
        if ((tokens.size() >= 4) && (tokens[1] == "ANSWER")
            && (tokens[2] == gCoreContext->GetHostName()))
        {
            m_answer = tokens[3];
 
            for (int i = 4; i < tokens.size(); i++)
                m_answer += QString(" ") + tokens[i];
 
            m_gotAnswer = true;
        }
    }
}
 
MythWebPage::MythWebPage(QObject *parent)
            : QWebPage(parent)
{
    setNetworkAccessManager(GetNetworkAccessManager());
}
 
MythWebPage::~MythWebPage()
{
    LOG(VB_GENERAL, LOG_DEBUG, "Refreshing DLManager's Cookie Jar");
    GetMythDownloadManager()->refreshCookieJar(networkManager->cookieJar());
    GetMythDownloadManager()->saveCookieJar(GetConfDir() + "/MythBrowser/cookiejar.txt");
}
 
bool MythWebPage::supportsExtension(Extension extension) const
{
    return extension == QWebPage::ErrorPageExtension;
}
 
bool MythWebPage::extension(Extension extension, const ExtensionOption *option,
                            ExtensionReturn *output)
{
    if (extension == QWebPage::ErrorPageExtension)
    {
        if (!option || !output)
            return false;
 
        // Using static_cast yields the clang-tidy warning: do not use
        // static_cast to downcast from a base to a derived class; use
        // dynamic_cast instead.  Using dynamic-cast yields the
        // compiler error: 'QWebPage::ExtensionOption' is not
        // polymorphic.
        //
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-static-cast-downcast)
        const auto *erroroption = static_cast<const ErrorPageExtensionOption *>(option);
        ErrorPageExtensionReturn *erroroutput = nullptr;
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-static-cast-downcast)
        erroroutput = static_cast<ErrorPageExtensionReturn *>(output);
 
        QString filename = "htmls/notfound.html";
 
        if (!GetMythUI()->FindThemeFile(filename))
            return false;
 
        QFile file(QLatin1String(qPrintable(filename)));
        bool isOpened = file.open(QIODevice::ReadOnly);
 
        if (!isOpened)
            return false;
 
        QString title = tr("Error loading page: %1").arg(erroroption->url.toString());
        QString html = QString(QLatin1String(file.readAll()))
                       .arg(title,
                            erroroption->errorString,
                            erroroption->url.toString());
 
        QBuffer imageBuffer;
        imageBuffer.open(QBuffer::ReadWrite);
        QIcon icon = QApplication::style()->standardIcon(QStyle::SP_MessageBoxWarning,
                                                 nullptr, nullptr);
        QPixmap pixmap = icon.pixmap(QSize(32, 32));
 
        if (pixmap.save(&imageBuffer, "PNG"))
        {
            html.replace(QLatin1String("IMAGE_BINARY_DATA_HERE"),
                         QString(QLatin1String(imageBuffer.buffer().toBase64())));
        }
 
        erroroutput->content = html.toUtf8();
 
        return true;
    }
 
    return false;
}
 
QString MythWebPage::userAgentForUrl(const QUrl &url) const
{
    return QWebPage::userAgentForUrl(url).replace("Safari", "MythBrowser");
}
 
MythWebView::MythWebView(QWidget *parent, MythUIWebBrowser *parentBrowser)
            : QWebView(parent),
      m_webpage(new MythWebPage(this)),
      m_parentBrowser(parentBrowser),
      m_api(new BrowserApi(this))
{
    setPage(m_webpage);
 
    connect(page(), &QWebPage::unsupportedContent,
            this, &MythWebView::handleUnsupportedContent);
 
    connect(page(), &QWebPage::downloadRequested,
            this, &MythWebView::handleDownloadRequested);
 
    page()->setForwardUnsupportedContent(true);
 
    m_api->setWebView(this);
}
 
MythWebView::~MythWebView(void)
{
    delete m_webpage;
    delete m_api;
}
 
const QString kgetType { QStringLiteral("\
function activeElement()\
{\
    var type;\
    type = document.activeElement.type;\
    return type;\
}\
activeElement();") };
 
void MythWebView::keyPressEvent(QKeyEvent *event)
{
    // does an edit have focus?
    QString type = m_parentBrowser->evaluateJavaScript(kgetType)
                                                    .toString().toLower();
    bool editHasFocus = (type == "text" || type == "textarea" ||
                         type == "password");
 
    // if the QWebView widget has focus then all keypresses from a regular
    // keyboard get sent here first
    if (editHasFocus || m_parentBrowser->IsInputToggled())
    {
        // input is toggled so pass all keypresses to the QWebView's handler
        QWebView::keyPressEvent(event);
    }
    else
    {
        // we need to convert a few keypress events so the QWebView does the
        // right thing
        QStringList actions;
        bool handled = false;
        handled = GetMythMainWindow()->TranslateKeyPress("Browser", event,
                                                         actions);
 
        for (int i = 0; i < actions.size() && !handled; i++)
        {
            const QString& action = actions[i];
            handled = true;
 
            if (action == "NEXTLINK")
            {
                QKeyEvent tabKey(event->type(), Qt::Key_Tab,
                                 event->modifiers(), QString(),
                                 event->isAutoRepeat(), event->count());
                *event = tabKey;
                QWebView::keyPressEvent(event);
                return;
            }
            if (action == "PREVIOUSLINK")
            {
                QKeyEvent shiftTabKey(event->type(), Qt::Key_Tab,
                                      event->modifiers() | Qt::ShiftModifier,
                                      QString(),
                                      event->isAutoRepeat(), event->count());
                *event = shiftTabKey;
                QWebView::keyPressEvent(event);
                return;
            }
            if (action == "FOLLOWLINK")
            {
                QKeyEvent returnKey(event->type(), Qt::Key_Return,
                                    event->modifiers(), QString(),
                                    event->isAutoRepeat(), event->count());
                *event = returnKey;
                QWebView::keyPressEvent(event);
                return;
            }
        }
 
        // pass the keyPress event to our main window handler so they get
        // handled properly by the various mythui handlers
        QCoreApplication::postEvent(GetMythMainWindow(), new QKeyEvent(*event));
    }
}
 
void MythWebView::handleUnsupportedContent(QNetworkReply *reply)
{
    if (reply->error() == QNetworkReply::NoError)
    {
        stop();
 
        QVariant header = reply->header(QNetworkRequest::ContentTypeHeader);
 
        if (header != QVariant())
        {
            LOG(VB_GENERAL, LOG_ERR,
                QString("MythWebView::handleUnsupportedContent - %1")
                .arg(header.toString()));
        }
 
        m_downloadReply = reply;
        m_downloadRequest = reply->request();
        m_downloadAndPlay = false;
        showDownloadMenu();
 
        return;
    }
}
 
void  MythWebView::handleDownloadRequested(const QNetworkRequest &request)
{
    m_downloadReply = nullptr;
    doDownloadRequested(request);
}
 
void  MythWebView::doDownloadRequested(const QNetworkRequest &request)
{
    m_downloadRequest = request;
 
    // get the filename from the url if available
    QFileInfo fi(request.url().path());
    QString basename(fi.completeBaseName());
    QString extension = fi.suffix().toLower();
    QString mimetype = getReplyMimetype();
 
    // if we have a default filename use that
    QString saveBaseName = basename;
 
    if (!m_parentBrowser->GetDefaultSaveFilename().isEmpty())
    {
        QFileInfo savefi(m_parentBrowser->GetDefaultSaveFilename());
        saveBaseName = savefi.completeBaseName();
    }
 
    // if the filename is still empty use a default name
    if (saveBaseName.isEmpty())
        saveBaseName = "unnamed_download";
 
    // if we don't have an extension from the filename get one from the mime type
    if (extension.isEmpty())
        extension = getExtensionForMimetype(mimetype);
 
    if (!extension.isEmpty())
        extension = '.' + extension;
 
    QString saveFilename = QString("%1%2%3")
                                .arg(m_parentBrowser->GetDefaultSaveDirectory(),
                                     saveBaseName,
                                     extension);
 
    // dont overwrite an existing file
    if (QFile::exists(saveFilename))
    {
        int i = 1;
 
        do
        {
            saveFilename = QString("%1%2-%3%4")
                                .arg(m_parentBrowser->GetDefaultSaveDirectory(),
                                     saveBaseName,
                                     QString::number(i++),
                                     extension);
        }
        while (QFile::exists(saveFilename));
    }
 
    // if we are downloading and then playing the file don't ask for the file name
    if (m_downloadAndPlay)
    {
        doDownload(saveFilename);
    }
    else
    {
        MythScreenStack *popupStack = GetMythMainWindow()->GetStack("popup stack");
 
        QString msg = tr("Enter filename to save file");
        auto *input = new MythTextInputDialog(popupStack, msg, FilterNone,
                                              false, saveFilename);
 
        if (input->Create())
        {
            input->SetReturnEvent(this, "filenamedialog");
            popupStack->AddScreen(input);
        }
        else
        {
            delete input;
        }
    }
}
 
void MythWebView::doDownload(const QString &saveFilename)
{
    if (saveFilename.isEmpty())
        return;
 
    openBusyPopup(tr("Downloading file. Please wait..."));
 
    // No need to make sure the path to saveFilename exists because
    // MythDownloadManage takes care of that
    GetMythDownloadManager()->queueDownload(m_downloadRequest.url().toString(),
                                            saveFilename, this);
}
 
void MythWebView::openBusyPopup(const QString &message)
{
    if (m_busyPopup)
        return;
 
    QString msg(tr("Downloading..."));
 
    if (!message.isEmpty())
        msg = message;
 
    MythScreenStack *popupStack = GetMythMainWindow()->GetStack("popup stack");
    m_busyPopup = new MythUIBusyDialog(msg, popupStack, "downloadbusydialog");
 
    if (m_busyPopup->Create())
        popupStack->AddScreen(m_busyPopup, false);
}
 
void MythWebView::closeBusyPopup(void)
{
    if (m_busyPopup)
        m_busyPopup->Close();
 
    m_busyPopup = nullptr;
}
 
void MythWebView::customEvent(QEvent *event)
{
    if (event->type() == DialogCompletionEvent::kEventType)
    {
        auto *dce = (DialogCompletionEvent *)(event);
 
        // make sure the user didn't ESCAPE out of the dialog
        if (dce->GetResult() < 0)
            return;
 
        QString resultid   = dce->GetId();
        QString resulttext = dce->GetResultText();
 
        if (resultid == "filenamedialog")
            doDownload(resulttext);
        else if (resultid == "downloadmenu")
        {
            if (resulttext == tr("Play the file"))
            {
                QFileInfo fi(m_downloadRequest.url().path());
                QString extension = fi.suffix();
                QString mimeType = getReplyMimetype();
 
                if (isMusicFile(extension, mimeType))
                {
                    MythEvent me(QString("MUSIC_COMMAND %1 PLAY_URL %2")
                                 .arg(gCoreContext->GetHostName(),
                                      m_downloadRequest.url().toString()));
                    gCoreContext->dispatch(me);
                }
                else if (isVideoFile(extension, mimeType))
                {
                    GetMythMainWindow()->HandleMedia("Internal",
                                            m_downloadRequest.url().toString());
                }
                else
                {
                    LOG(VB_GENERAL, LOG_ERR,
                        QString("MythWebView: Asked to play a file with "
                                "extension '%1' but don't know how")
                        .arg(extension));
                }
            }
            else if (resulttext == tr("Download the file"))
            {
                doDownloadRequested(m_downloadRequest);
            }
            else if (resulttext == tr("Download and play the file"))
            {
                m_downloadAndPlay = true;
                doDownloadRequested(m_downloadRequest);
            }
        }
    }
    else if (event->type() == MythEvent::kMythEventMessage)
    {
        auto *me = dynamic_cast<MythEvent *>(event);
        if (me == nullptr)
            return;
 
        QStringList tokens = me->Message().split(" ", Qt::SkipEmptyParts);
        if (tokens.isEmpty())
            return;
 
        if (tokens[0] == "DOWNLOAD_FILE")
        {
            QStringList args = me->ExtraDataList();
 
            if (tokens[1] == "UPDATE")
            {
                // could update a progressbar here
            }
            else if (tokens[1] == "FINISHED")
            {
                int fileSize  = args[2].toInt();
                int errorCode = args[4].toInt();
                const QString& filename = args[1];
 
                closeBusyPopup();
 
                if ((errorCode != 0) || (fileSize == 0))
                    ShowOkPopup(tr("ERROR downloading file."));
                else if (m_downloadAndPlay)
                    GetMythMainWindow()->HandleMedia("Internal", filename);
 
                MythEvent me2(QString("BROWSER_DOWNLOAD_FINISHED"), args);
                gCoreContext->dispatch(me2);
            }
        }
    }
}
 
void MythWebView::showDownloadMenu(void)
{
    QFileInfo fi(m_downloadRequest.url().path());
    QString extension = fi.suffix();
    QString mimeType = getReplyMimetype();
 
    QString label = tr("What do you want to do with this file?");
 
    MythScreenStack *popupStack = GetMythMainWindow()->GetStack("popup stack");
 
    auto *menu = new MythDialogBox(label, popupStack, "downloadmenu");
 
    if (!menu->Create())
    {
        delete menu;
        return;
    }
 
    menu->SetReturnEvent(this, "downloadmenu");
 
    if (isMusicFile(extension, mimeType))
        menu->AddButton(tr("Play the file"));
 
    if (isVideoFile(extension, mimeType))
        menu->AddButton(tr("Download and play the file"));
 
    menu->AddButton(tr("Download the file"));
    menu->AddButton(tr("Cancel"));
 
    popupStack->AddScreen(menu);
}
 
QString MythWebView::getExtensionForMimetype(const QString &mimetype)
{
    if (mimetype.isEmpty())
        return {""};
 
    auto it = std::find_if(SupportedMimeTypes.cbegin(), SupportedMimeTypes.cend(),
                           [mimetype] (const MimeType& entry) -> bool
                               { return mimetype == entry.m_mimeType; });
    if (it != SupportedMimeTypes.cend())
        return it->m_extension;
    return {""};
}
 
bool MythWebView::isMusicFile(const QString &extension, const QString &mimetype)
{
    return std::any_of(SupportedMimeTypes.cbegin(), SupportedMimeTypes.cend(),
                       [extension, mimetype](const auto &entry){
                           if (entry.m_isVideo)
                               return false;
                           if (!mimetype.isEmpty() &&
                               mimetype == entry.m_mimeType)
                               return true;
                           if (!extension.isEmpty() &&
                               extension.toLower() == entry.m_extension)
                               return true;
                           return false; } );
}
 
bool MythWebView::isVideoFile(const QString &extension, const QString &mimetype)
{
    return std::any_of(SupportedMimeTypes.cbegin(), SupportedMimeTypes.cend(),
                       [extension, mimetype](const auto &entry) {
                           if (!entry.m_isVideo)
                               return false;
                           if (!mimetype.isEmpty() &&
                               mimetype == entry.m_mimeType)
                               return true;
                           if (!extension.isEmpty() &&
                               extension.toLower() == entry.m_extension)
                               return true;
                           return false; } );
}
 
QString MythWebView::getReplyMimetype(void)
{
    if (!m_downloadReply)
        return {};
 
    QString mimeType;
    QVariant header = m_downloadReply->header(QNetworkRequest::ContentTypeHeader);
 
    if (header != QVariant())
        mimeType = header.toString();
 
    return mimeType;
}
 
QWebView *MythWebView::createWindow(QWebPage::WebWindowType /* type */)
{
    return (QWebView *) this;
}
 
 
MythUIWebBrowser::MythUIWebBrowser(MythUIType *parent, const QString &name)
                 : MythUIType(parent, name),
      m_bgColor("White"),    m_userCssFile(""),
      m_defaultSaveDir(GetConfDir() + "/MythBrowser/"),
      m_defaultSaveFilename(""),
      m_lastMouseAction("")
{
    SetCanTakeFocus(true);
    m_scrollAnimation.setDuration(0);
    m_lastUpdateTime.start();
}
 
void MythUIWebBrowser::Finalize(void)
{
    MythUIType::Finalize();
 
    Init();
}
 
void MythUIWebBrowser::Init(void)
{
    // only do the initialisation for widgets not being stored in the global object store
    if (parent() == GetGlobalObjectStore())
        return;
 
    if (m_initialized)
        return;
 
    m_actualBrowserArea = m_browserArea;
    m_actualBrowserArea.CalculateArea(m_area);
    m_actualBrowserArea.translate(m_area.x(), m_area.y());
 
    if (!m_actualBrowserArea.isValid())
        m_actualBrowserArea = m_area;
 
    m_browser = new MythWebView(GetMythMainWindow()->GetPaintWindow(), this);
    m_browser->setPalette(QApplication::style()->standardPalette());
    m_browser->setGeometry(m_actualBrowserArea);
    m_browser->setFixedSize(m_actualBrowserArea.size());
    m_browser->move(m_actualBrowserArea.x(), m_actualBrowserArea.y());
    m_browser->page()->setLinkDelegationPolicy(QWebPage::DontDelegateLinks);
 
    bool err = false;
    UIUtilW::Assign(this, m_horizontalScrollbar, "horizscrollbar", &err);
    UIUtilW::Assign(this, m_verticalScrollbar, "vertscrollbar", &err);
    if (m_horizontalScrollbar)
    {
        QWebFrame* frame = m_browser->page()->currentFrame();
        frame->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);
        connect(m_horizontalScrollbar, &MythUIType::Hiding,
                this, &MythUIWebBrowser::slotScrollBarHiding);
        connect(m_horizontalScrollbar, &MythUIType::Showing,
                this, &MythUIWebBrowser::slotScrollBarShowing);
    }
 
    if (m_verticalScrollbar)
    {
        QWebFrame* frame = m_browser->page()->currentFrame();
        frame->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
        connect(m_verticalScrollbar, &MythUIType::Hiding,
                this, &MythUIWebBrowser::slotScrollBarHiding);
        connect(m_verticalScrollbar, &MythUIType::Showing,
                this, &MythUIWebBrowser::slotScrollBarShowing);
    }
 
    // if we have a valid css URL use that ...
    if (!m_userCssFile.isEmpty())
    {
        QString filename = m_userCssFile;
 
        if (GetMythUI()->FindThemeFile(filename))
            LoadUserStyleSheet(QUrl("file://" + filename));
    }
    else
    {
        // ...otherwise use the default one
        QString filename = "htmls/mythbrowser.css";
 
        if (GetMythUI()->FindThemeFile(filename))
            LoadUserStyleSheet(QUrl("file://" + filename));
    }
 
    m_browser->winId();
 
    SetActive(m_active);
 
    connect(m_browser, &QWebView::loadStarted,
            this, &MythUIWebBrowser::slotLoadStarted);
    connect(m_browser, &QWebView::loadFinished,
            this, &MythUIWebBrowser::slotLoadFinished);
    connect(m_browser, &QWebView::loadProgress,
            this, &MythUIWebBrowser::slotLoadProgress);
    connect(m_browser, &QWebView::titleChanged,
            this, &MythUIWebBrowser::slotTitleChanged);
    connect(m_browser, &QWebView::iconChanged,
            this, &MythUIWebBrowser::slotIconChanged);
    connect(m_browser, &QWebView::statusBarMessage,
            this, &MythUIWebBrowser::slotStatusBarMessage);
    connect(m_browser->page(), &QWebPage::linkHovered,
            this, &MythUIWebBrowser::slotStatusBarMessage);
    connect(m_browser, &QWebView::linkClicked,
            this, &MythUIWebBrowser::slotLinkClicked);
 
    // find what screen we are on
    m_parentScreen = nullptr;
    QObject *parentObject = parent();
 
    while (parentObject)
    {
        m_parentScreen = qobject_cast<MythScreenType *>(parentObject);
 
        if (m_parentScreen)
            break;
 
        parentObject = parentObject->parent();
    }
 
    if (!m_parentScreen && parent() != GetGlobalObjectStore())
        LOG(VB_GENERAL, LOG_ERR,
            "MythUIWebBrowser: failed to find our parent screen");
 
    // connect to the topScreenChanged signals on each screen stack
    for (int x = 0; x < GetMythMainWindow()->GetStackCount(); x++)
    {
        MythScreenStack *stack = GetMythMainWindow()->GetStackAt(x);
 
        if (stack)
            connect(stack, &MythScreenStack::topScreenChanged,
                    this, &MythUIWebBrowser::slotTopScreenChanged);
    }
 
    // set up the icon cache directory
    QString path = GetConfDir();
    QDir dir(path);
 
    if (!dir.exists())
        dir.mkdir(path);
 
    path += "/MythBrowser";
    dir.setPath(path);
 
    if (!dir.exists())
        dir.mkdir(path);
 
    QWebSettings::setIconDatabasePath(path);
 
    if (gCoreContext->GetNumSetting("WebBrowserEnablePlugins", 1) == 1)
    {
        LOG(VB_GENERAL, LOG_INFO, "MythUIWebBrowser: enabling plugins");
        QWebSettings::globalSettings()->setAttribute(QWebSettings::PluginsEnabled,
                                                     true);
    }
    else
    {
        LOG(VB_GENERAL, LOG_INFO, "MythUIWebBrowser: disabling plugins");
        QWebSettings::globalSettings()->setAttribute(QWebSettings::PluginsEnabled,
                                                     false);
    }
 
    if (!gCoreContext->GetBoolSetting("WebBrowserEnableJavascript",true))
    {
        LOG(VB_GENERAL, LOG_INFO, "MythUIWebBrowser: disabling JavaScript");
        QWebSettings::globalSettings()->setAttribute(QWebSettings::JavascriptEnabled, false);
    }
 
    QImage image = QImage(m_actualBrowserArea.size(), QImage::Format_ARGB32);
    m_image = GetPainter()->GetFormatImage();
    m_image->Assign(image);
 
    SetBackgroundColor(m_bgColor);
 
    m_zoom = gCoreContext->GetFloatSetting("WebBrowserZoomLevel", 1.0);
 
    SetZoom(m_zoom);
 
    if (!m_widgetUrl.isEmpty() && m_widgetUrl.isValid())
        LoadPage(m_widgetUrl);
 
    m_initialized = true;
}
 
MythUIWebBrowser::~MythUIWebBrowser()
{
    if (m_browser)
    {
        m_browser->hide();
        m_browser->disconnect();
        m_browser->deleteLater();
        m_browser = nullptr;
    }
 
    if (m_image)
    {
        m_image->DecrRef();
        m_image = nullptr;
    }
}
 
void MythUIWebBrowser::LoadPage(const QUrl& url)
{
    if (!m_browser)
        return;
 
    ResetScrollBars();
 
    m_browser->setUrl(url);
}
 
void MythUIWebBrowser::SetHtml(const QString &html, const QUrl &baseUrl)
{
    if (!m_browser)
        return;
 
    ResetScrollBars();
 
    m_browser->setHtml(html, baseUrl);
}
 
void MythUIWebBrowser::LoadUserStyleSheet(const QUrl& url)
{
    if (!m_browser)
        return;
 
    LOG(VB_GENERAL, LOG_INFO,
        "MythUIWebBrowser: Loading css from - " + url.toString());
 
    m_browser->page()->settings()->setUserStyleSheetUrl(url);
}
 
void MythUIWebBrowser::SetBackgroundColor(QColor color)
{
    if (!m_browser)
        return;
 
    color.setAlpha(255);
    QPalette palette = m_browser->page()->palette();
    palette.setBrush(QPalette::Window, QBrush(color));
    palette.setBrush(QPalette::Base, QBrush(color));
    m_browser->page()->setPalette(palette);
 
    UpdateBuffer();
}
 
void MythUIWebBrowser::SetActive(bool active)
{
    if (!m_browser)
        return;
 
    if (m_active == active)
        return;
 
    m_active = active;
    m_wasActive = active;
 
    if (m_active)
    {
        m_browser->setUpdatesEnabled(false);
        m_browser->setFocus();
        m_browser->show();
        m_browser->raise();
        if (QGuiApplication::platformName().contains("egl"))
        {
            m_browser->setParent(nullptr);
            m_browser->setFocus();
            m_browser->show();
            m_browser->raise();
        }
        m_browser->setUpdatesEnabled(true);
    }
    else
    {
        m_browser->clearFocus();
        m_browser->hide();
        if (QGuiApplication::platformName().contains("egl"))
            m_browser->setParent(GetMythMainWindow());
        UpdateBuffer();
    }
}
 
void MythUIWebBrowser::ZoomIn(void)
{
    SetZoom(m_zoom + 0.1);
}
 
void MythUIWebBrowser::ZoomOut(void)
{
    SetZoom(m_zoom - 0.1);
}
 
void MythUIWebBrowser::SetZoom(double zoom)
{
    if (!m_browser)
        return;
 
    m_zoom = std::clamp(zoom, 0.3, 5.0);
    m_browser->setZoomFactor(m_zoom);
    ResetScrollBars();
    UpdateBuffer();
 
    slotStatusBarMessage(tr("Zoom: %1%").arg(m_zoom * 100));
 
    gCoreContext->SaveSetting("WebBrowserZoomLevel", QString("%1").arg(m_zoom));
}
 
void MythUIWebBrowser::SetDefaultSaveDirectory(const QString &saveDir)
{
    if (!saveDir.isEmpty())
        m_defaultSaveDir = saveDir;
    else
        m_defaultSaveDir = GetConfDir() + "/MythBrowser/";
}
 
void MythUIWebBrowser::SetDefaultSaveFilename(const QString &filename)
{
    if (!filename.isEmpty())
        m_defaultSaveFilename = filename;
    else
        m_defaultSaveFilename.clear();
}
 
float MythUIWebBrowser::GetZoom(void) const
{
    return m_zoom;
}
 
bool MythUIWebBrowser::CanGoForward(void)
{
    if (!m_browser)
        return false;
 
    return m_browser->history()->canGoForward();
}
 
bool MythUIWebBrowser::CanGoBack(void)
{
    if (!m_browser)
        return false;
 
    return m_browser->history()->canGoBack();
}
 
void MythUIWebBrowser::Back(void)
{
    if (!m_browser)
        return;
 
    m_browser->back();
}
 
void MythUIWebBrowser::Forward(void)
{
    if (!m_browser)
        return;
 
    m_browser->forward();
}
 
QIcon MythUIWebBrowser::GetIcon(void)
{
    if (m_browser)
    {
        return QWebSettings::iconForUrl(m_browser->url());
    }
    return {};
}
 
QUrl MythUIWebBrowser::GetUrl(void)
{
    if (m_browser)
    {
        return m_browser->url();
    }
    return {};
}
 
QString MythUIWebBrowser::GetTitle(void)
{
    if (m_browser)
        return m_browser->title();
    return {""};
}
 
QVariant MythUIWebBrowser::evaluateJavaScript(const QString &scriptSource)
{
    if (m_browser)
    {
        QWebFrame *frame = m_browser->page()->currentFrame();
        return frame->evaluateJavaScript(scriptSource);
    }
    return {};
}
 
void MythUIWebBrowser::Scroll(int dx, int dy)
{
    if (!m_browser)
        return;
 
    QPoint startPos = m_browser->page()->currentFrame()->scrollPosition();
    QPoint endPos = startPos + QPoint(dx, dy);
 
    if (GetPainter()->SupportsAnimation() && m_scrollAnimation.duration() > 0)
    {
        // Previous scroll has been completed
        if (m_destinationScrollPos == startPos)
            m_scrollAnimation.setEasingCurve(QEasingCurve::InOutCubic);
        else
            m_scrollAnimation.setEasingCurve(QEasingCurve::OutCubic);
 
        m_destinationScrollPos = endPos;
        m_scrollAnimation.setStartValue(startPos);
        m_scrollAnimation.setEndValue(m_destinationScrollPos);
        m_scrollAnimation.Activate();
    }
    else
    {
        m_destinationScrollPos = endPos;
        m_browser->page()->currentFrame()->setScrollPosition(endPos);
        UpdateBuffer();
    }
}
 
void MythUIWebBrowser::slotLoadStarted(void)
{
    ResetScrollBars();
    emit loadStarted();
}
 
void MythUIWebBrowser::slotLoadFinished(bool ok)
{
    UpdateBuffer();
    emit loadFinished(ok);
}
 
void MythUIWebBrowser::slotLoadProgress(int progress)
{
    emit loadProgress(progress);
}
 
void MythUIWebBrowser::slotTitleChanged(const QString &title)
{
    emit titleChanged(title);
}
 
void MythUIWebBrowser::slotStatusBarMessage(const QString &text)
{
    emit statusBarMessage(text);
}
 
void MythUIWebBrowser::slotLinkClicked(const QUrl &url)
{
    LoadPage(url);
}
 
void MythUIWebBrowser::slotIconChanged(void)
{
    emit iconChanged();
}
 
void MythUIWebBrowser::slotScrollBarShowing(void)
{
    bool wasActive = (m_wasActive || m_active);
    SetActive(false);
    m_wasActive = wasActive;
}
 
void MythUIWebBrowser::slotScrollBarHiding(void)
{
    SetActive(m_wasActive);
    slotTopScreenChanged(nullptr);
}
 
void MythUIWebBrowser::slotTopScreenChanged(MythScreenType * /* screen */)
{
    if (IsOnTopScreen())
        SetActive(m_wasActive);
    else
    {
        bool wasActive = (m_wasActive || m_active);
        SetActive(false);
        m_wasActive = wasActive;
    }
}
 
bool MythUIWebBrowser::IsOnTopScreen(void)
{
     if (!m_parentScreen)
        return false;
 
    for (int x = GetMythMainWindow()->GetStackCount() - 1; x >= 0; x--)
    {
        MythScreenStack *stack = GetMythMainWindow()->GetStackAt(x);
 
        // ignore stacks with no screens on them
        if (!stack->GetTopScreen())
            continue;
 
        return (stack->GetTopScreen() == m_parentScreen);
    }
 
    return false;
}
 
 
void MythUIWebBrowser::UpdateScrollBars(void)
{
    if (!m_browser)
        return;
 
    QPoint position = m_browser->page()->currentFrame()->scrollPosition();
    if (m_verticalScrollbar)
    {
        int maximum =
            m_browser->page()->currentFrame()->contentsSize().height() -
            m_actualBrowserArea.height();
        m_verticalScrollbar->SetMaximum(maximum);
        m_verticalScrollbar->SetPageStep(m_actualBrowserArea.height());
        m_verticalScrollbar->SetSliderPosition(position.y());
    }
 
    if (m_horizontalScrollbar)
    {
        int maximum =
            m_browser->page()->currentFrame()->contentsSize().width() -
            m_actualBrowserArea.width();
        m_horizontalScrollbar->SetMaximum(maximum);
        m_horizontalScrollbar->SetPageStep(m_actualBrowserArea.width());
        m_horizontalScrollbar->SetSliderPosition(position.x());
    }
}
 
void MythUIWebBrowser::UpdateBuffer(void)
{
    UpdateScrollBars();
 
    if (!m_image || !m_browser)
        return;
 
    if (!m_active || (m_active && !m_browser->hasFocus()))
    {
        QPainter painter(m_image);
        m_browser->render(&painter);
        painter.end();
 
        m_image->SetChanged();
        Refresh();
    }
}
 
void MythUIWebBrowser::Pulse(void)
{
    if (!m_browser)
        return;
 
    if (m_scrollAnimation.IsActive() &&
        m_destinationScrollPos !=
        m_browser->page()->currentFrame()->scrollPosition())
    {
        m_scrollAnimation.IncrementCurrentTime();
 
        QPoint scrollPosition = m_scrollAnimation.currentValue().toPoint();
        m_browser->page()->currentFrame()->setScrollPosition(scrollPosition);
 
        SetRedraw();
        UpdateBuffer();
    }
    else if (m_updateInterval && m_lastUpdateTime.hasExpired(m_updateInterval))
    {
        UpdateBuffer();
        m_lastUpdateTime.start();
    }
 
    MythUIType::Pulse();
}
 
void MythUIWebBrowser::DrawSelf(MythPainter *p, int xoffset, int yoffset,
                                int alphaMod, QRect clipRect)
{
    if (!m_image || m_image->isNull() || !m_browser || m_browser->hasFocus())
        return;
 
    QRect area = m_actualBrowserArea;
    area.translate(xoffset, yoffset);
 
    p->SetClipRect(clipRect);
    p->DrawImage(area.x(), area.y(), m_image, alphaMod);
}
 
bool MythUIWebBrowser::keyPressEvent(QKeyEvent *event)
{
    if (!m_browser)
        return false;
 
    QStringList actions;
    bool handled = false;
    handled = GetMythMainWindow()->TranslateKeyPress("Browser", event, actions);
 
    for (int i = 0; i < actions.size() && !handled; i++)
    {
        const QString& action = actions[i];
        handled = true;
 
        if (action == "TOGGLEINPUT")
        {
            m_inputToggled = !m_inputToggled;
 
            if (m_inputToggled)
                slotStatusBarMessage(tr("Sending key presses to web page"));
            else
                slotStatusBarMessage(tr("Sending key presses to MythTV"));
 
            return true;
        }
 
        // if input is toggled all input goes to the web page
        if (m_inputToggled)
        {
            m_browser->keyPressEvent(event);
 
            return true;
        }
 
        QWebFrame *frame = m_browser->page()->currentFrame();
        if (action == "UP")
        {
            int pos = frame->scrollPosition().y();
 
            if (pos > 0)
            {
                Scroll(0, -m_actualBrowserArea.height() / 10);
            }
            else
            {
                handled = false;
            }
        }
        else if (action == "DOWN")
        {
            int pos = frame->scrollPosition().y();
            QSize maximum = frame->contentsSize() - m_actualBrowserArea.size();
 
            if (pos != maximum.height())
            {
                Scroll(0, m_actualBrowserArea.height() / 10);
            }
            else
            {
                handled = false;
            }
        }
        else if (action == "LEFT")
        {
            int pos = frame->scrollPosition().x();
 
            if (pos > 0)
            {
                Scroll(-m_actualBrowserArea.width() / 10, 0);
            }
            else
            {
                handled = false;
            }
        }
        else if (action == "RIGHT")
        {
            int pos = frame->scrollPosition().x();
            QSize maximum = frame->contentsSize() - m_actualBrowserArea.size();
 
            if (pos != maximum.width())
            {
                Scroll(m_actualBrowserArea.width() / 10, 0);
            }
            else
            {
                handled = false;
            }
        }
        else if (action == "PAGEUP")
        {
            Scroll(0, -m_actualBrowserArea.height());
        }
        else if (action == "PAGEDOWN")
        {
            Scroll(0, m_actualBrowserArea.height());
        }
        else if (action == "ZOOMIN")
        {
            ZoomIn();
        }
        else if (action == "ZOOMOUT")
        {
            ZoomOut();
        }
        else if (action == "MOUSEUP" || action == "MOUSEDOWN" ||
                 action == "MOUSELEFT" || action == "MOUSERIGHT" ||
                 action == "MOUSELEFTBUTTON")
        {
            HandleMouseAction(action);
        }
        else if (action == "PAGELEFT")
        {
            Scroll(-m_actualBrowserArea.width(), 0);
        }
        else if (action == "PAGERIGHT")
        {
            Scroll(m_actualBrowserArea.width(), 0);
        }
        else if ((action == "NEXTLINK")     ||
                 (action == "PREVIOUSLINK") ||
                 (action == "FOLLOWLINK"))
        {
            m_browser->keyPressEvent(event);
        }
        else if (action == "HISTORYBACK")
        {
            Back();
        }
        else if (action == "HISTORYFORWARD")
        {
            Forward();
        }
        else
        {
            handled = false;
        }
    }
 
    return handled;
}
 
void MythUIWebBrowser::HandleMouseAction(const QString &action)
{
    int step = 5;
 
    // speed up mouse movement if the same key is held down
    if (action == m_lastMouseAction &&
        m_lastMouseActionTime.isValid() &&
        !m_lastMouseActionTime.hasExpired(500))
    {
        m_lastMouseActionTime.start();
        m_mouseKeyCount++;
 
        if (m_mouseKeyCount > 5)
            step = 25;
    }
    else
    {
        m_lastMouseAction = action;
        m_lastMouseActionTime.start();
        m_mouseKeyCount = 1;
    }
 
    if (action == "MOUSEUP")
    {
        QPoint curPos = QCursor::pos();
        QCursor::setPos(curPos.x(), curPos.y() - step);
    }
    else if (action == "MOUSELEFT")
    {
        QPoint curPos = QCursor::pos();
        QCursor::setPos(curPos.x() - step, curPos.y());
    }
    else if (action == "MOUSERIGHT")
    {
        QPoint curPos = QCursor::pos();
        QCursor::setPos(curPos.x() + step, curPos.y());
    }
    else if (action == "MOUSEDOWN")
    {
        QPoint curPos = QCursor::pos();
        QCursor::setPos(curPos.x(), curPos.y() + step);
    }
    else if (action == "MOUSELEFTBUTTON")
    {
        QPoint curPos = QCursor::pos();
        QWidget *widget = QApplication::widgetAt(curPos);
 
        if (widget)
        {
            curPos = widget->mapFromGlobal(curPos);
 
            auto *me = new QMouseEvent(QEvent::MouseButtonPress, curPos,
                                              Qt::LeftButton, Qt::LeftButton,
                                              Qt::NoModifier);
            QCoreApplication::postEvent(widget, me);
 
            me = new QMouseEvent(QEvent::MouseButtonRelease, curPos,
                                 Qt::LeftButton, Qt::NoButton, Qt::NoModifier);
            QCoreApplication::postEvent(widget, me);
        }
    }
}
 
void MythUIWebBrowser::ResetScrollBars()
{
    if (m_verticalScrollbar)
    {
        m_verticalScrollbar->Reset();
        m_verticalScrollbar->Hide();
    }
 
    if (m_horizontalScrollbar)
    {
        m_horizontalScrollbar->Reset();
        m_horizontalScrollbar->Hide();
    }
}
 
bool MythUIWebBrowser::ParseElement(
    const QString &filename, QDomElement &element, bool showWarnings)
{
    if (element.tagName() == "zoom")
    {
        QString zoom = getFirstText(element);
        m_zoom = zoom.toDouble();
    }
    else if (element.tagName() == "url")
    {
        m_widgetUrl.setUrl(getFirstText(element));
    }
    else if (element.tagName() == "userstylesheet")
    {
        m_userCssFile = getFirstText(element);
    }
    else if (element.tagName() == "updateinterval")
    {
        QString interval = getFirstText(element);
        m_updateInterval = interval.toInt();
    }
    else if (element.tagName() == "background")
    {
        m_bgColor = QColor(element.attribute("color", "#ffffff"));
        int alpha = element.attribute("alpha", "255").toInt();
        m_bgColor.setAlpha(alpha);
    }
    else if (element.tagName() == "browserarea")
    {
        m_browserArea = parseRect(element);
    }
    else if (element.tagName() == "scrollduration")
    {
        QString duration = getFirstText(element);
        m_scrollAnimation.setDuration(duration.toInt());
    }
    else if (element.tagName() == "acceptsfocus")
    {
        SetCanTakeFocus(parseBool(element));
    }
    else
    {
        return MythUIType::ParseElement(filename, element, showWarnings);
    }
 
    return true;
}
 
void MythUIWebBrowser::CopyFrom(MythUIType *base)
{
    auto *browser = dynamic_cast<MythUIWebBrowser *>(base);
    if (!browser)
    {
        LOG(VB_GENERAL, LOG_ERR, "ERROR, bad parsing");
        return;
    }
 
    MythUIType::CopyFrom(base);
 
    m_browserArea = browser->m_browserArea;
    m_zoom = browser->m_zoom;
    m_bgColor = browser->m_bgColor;
    m_widgetUrl = browser->m_widgetUrl;
    m_userCssFile = browser->m_userCssFile;
    m_updateInterval = browser->m_updateInterval;
    m_defaultSaveDir = browser->m_defaultSaveDir;
    m_defaultSaveFilename = browser->m_defaultSaveFilename;
    m_scrollAnimation.setDuration(browser->m_scrollAnimation.duration());
}
 
void MythUIWebBrowser::CreateCopy(MythUIType *parent)
{
    auto *browser = new MythUIWebBrowser(parent, objectName());
    browser->CopyFrom(this);
}