Add support for checking if audio is played in a page.

Add support for checking if audio is played in a page, as well
as the ability to (un)mute the audio.

Modify demobrowser example to show (muted) in the tab title, if
the tab is muted, or (audible) if there is audio playing in the tab.
Fix HTML5 audio/video (un)mute to also work.

Change-Id: I7213645e67be2f9da1c5f96cdf6c7eef5341ae4b
Task-number: QTBUG-48788
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/examples/webenginewidgets/demobrowser/tabwidget.cpp b/examples/webenginewidgets/demobrowser/tabwidget.cpp
index 95b79aaac..a7e94ee62 100644
--- a/examples/webenginewidgets/demobrowser/tabwidget.cpp
+++ b/examples/webenginewidgets/demobrowser/tabwidget.cpp
@@ -126,6 +126,15 @@ void TabBar::contextMenuRequested(const QPoint &position)
         action = menu.addAction(tr("Reload Tab"),
                 this, SLOT(reloadTab()), QKeySequence::Refresh);
         action->setData(index);
+
+        // Audio mute / unmute.
+        action = menu.addAction(tr("Mute tab"),
+                this, SLOT(muteTab()));
+        action->setData(index);
+
+        action = menu.addAction(tr("Unmute tab"),
+                this, SLOT(unmuteTab()));
+        action->setData(index);
     } else {
         menu.addSeparator();
     }
@@ -209,6 +218,22 @@ void TabBar::reloadTab()
     }
 }
 
+void TabBar::muteTab()
+{
+    if (QAction *action = qobject_cast<QAction*>(sender())) {
+        int index = action->data().toInt();
+        emit muteTab(index, true);
+    }
+}
+
+void TabBar::unmuteTab()
+{
+    if (QAction *action = qobject_cast<QAction*>(sender())) {
+        int index = action->data().toInt();
+        emit muteTab(index, false);
+    }
+}
+
 TabWidget::TabWidget(QWidget *parent)
     : QTabWidget(parent)
     , m_recentlyClosedTabsAction(0)
@@ -233,6 +258,7 @@ TabWidget::TabWidget(QWidget *parent)
     connect(m_tabBar, SIGNAL(reloadTab(int)), this, SLOT(reloadTab(int)));
     connect(m_tabBar, SIGNAL(reloadAllTabs()), this, SLOT(reloadAllTabs()));
     connect(m_tabBar, SIGNAL(tabMoved(int,int)), this, SLOT(moveTab(int,int)));
+    connect(m_tabBar, SIGNAL(muteTab(int,bool)), this, SLOT(setAudioMutedForTab(int,bool)));
     setTabBar(m_tabBar);
     setDocumentMode(true);
 
@@ -298,6 +324,18 @@ void TabWidget::moveTab(int fromIndex, int toIndex)
     m_lineEdits->insertWidget(toIndex, lineEdit);
 }
 
+void TabWidget::setAudioMutedForTab(int index, bool mute)
+{
+    if (index < 0)
+        index = currentIndex();
+    if (index < 0 || index >= count())
+        return;
+
+    QWidget *widget = this->widget(index);
+    if (WebView *tab = qobject_cast<WebView*>(widget))
+        tab->page()->setAudioMuted(mute);
+}
+
 void TabWidget::addWebAction(QAction *action, QWebEnginePage::WebAction webAction)
 {
     if (!action)
@@ -506,6 +544,10 @@ WebView *TabWidget::newTab(bool makeCurrent)
             this, SLOT(webViewIconChanged()));
     connect(webView, SIGNAL(titleChanged(QString)),
             this, SLOT(webViewTitleChanged(QString)));
+    connect(webView->page(), SIGNAL(audioMutedChanged(bool)),
+            this, SLOT(webPageMutedOrAudibleChanged()));
+    connect(webView->page(), SIGNAL(wasRecentlyAudibleChanged(bool)),
+            this, SLOT(webPageMutedOrAudibleChanged()));
     connect(webView, SIGNAL(urlChanged(QUrl)),
             this, SLOT(webViewUrlChanged(QUrl)));
     connect(webView->page(), SIGNAL(windowCloseRequested()),
@@ -680,6 +722,23 @@ void TabWidget::webViewTitleChanged(const QString &title)
     BrowserApplication::historyManager()->updateHistoryItem(webView->url(), title);
 }
 
+void TabWidget::webPageMutedOrAudibleChanged() {
+    QWebEnginePage* webPage = qobject_cast<QWebEnginePage*>(sender());
+    WebView *webView = qobject_cast<WebView*>(webPage->view());
+
+    int index = webViewIndex(webView);
+    if (-1 != index) {
+        QString title = webView->title();
+
+        bool muted = webPage->isAudioMuted();
+        bool audible = webPage->wasRecentlyAudible();
+        if (muted) title += tr(" (muted)");
+        else if (audible) title += tr(" (audible)");
+
+        setTabText(index, title);
+    }
+}
+
 void TabWidget::webViewUrlChanged(const QUrl &url)
 {
     WebView *webView = qobject_cast<WebView*>(sender());