How to compile qtwebkit-plugins?

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QtWebkit-plugins is a library that provides features to the QWebView eg SpellCheck and Notification Web API.

Read about:

• SpellCheck

• Notification Web API

I tried to compile the code in Windows, but my QWebView not working as expected, in other words SpellCheck and Notification Web API not working. It's like I've been not-using "QtWebkitplugins". Which can be?

In the documentation that says to compile I have to run:

$ qmake
$ make && make install

Read more in QtWebkit-plugins repository

But I read on another issue (here in StackOverflow) that when I use the MingW I do not need to use qmake, so I tried to do the step-by-step to compile:

• I compiled hunspell
• Copied hunspell for C:\Qt5.4.0\5.4\mingw491_32\bin and C:\Qt5.4.0\5.4\mingw491_32\lib
• Compiled the qtwebkit-plugins.pro project (clicked in Build on QtCreator)
• Build generate libqtwebkitpluginsd.a and qtwebkitplugins.dll
• Copied libqtwebkitpluginsd.a for C:\Qt5.4.0\5.4\mingw491_32\lib
• Copied qtwebkitplugins.dll for C:\Qt5.4.0\5.4\mingw491_32\plugins\webkit and C:\Qt5.4.0\5.4\mingw491_32\bin

After that I compiled another simple project that uses QWebView then tested the SpellCheck in a <textarea spellcheck="true"></textarea> and did not work.

I tested the Notification Web API and also did not work.

How do my projects work these features?

[SGaist]

Hi,

You should run your application with the QT_DEBUG_PUGINS environment variable set to 1 to see if the plugins are found and if they encounter a problem loading. You can do that in the run part of the Project panel

Hope it helps

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@SGaist said:

Hi,
You should run your application with the QT_DEBUG_PUGINS environment variable set to 1 > to see if the plugins are found and if they encounter a problem loading. You can do that in the run part of the Project panel

Hope it helps

Thanks, I added in Project > Build Environment this var QT_DEBUG_PLUGINS = 1 and work, returning this:

http://pastebin.com/LVmLWASZ

But it not show qtwebkitplugins.dll in the log.

How can I solve this issue?

[SGaist]

Just thought of something, why didn't you call mingw32-make install ?

Also did you enable the plugins in the QWebSettings of your application ?

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@SGaist said:

Just thought of something, why didn't you call mingw32-make install ?

Also did you enable the plugins in the QWebSettings of your application ?

Thank you for your dedication,

How to call the mingw32-make install?

QWebsettings:

QWebSettings *settings = QWebSettings::globalSettings();
settings->setAttribute(QWebSettings::OfflineWebApplicationCacheEnabled, true);
settings->setAttribute(QWebSettings::OfflineStorageDatabaseEnabled, true);
settings->setAttribute(QWebSettings::LocalStorageEnabled, true);
settings->setAttribute(QWebSettings::JavascriptCanOpenWindows, true);
settings->setAttribute(QWebSettings::JavascriptCanCloseWindows, true);
settings->setAttribute(QWebSettings::JavascriptEnabled, true);
settings->setAttribute(QWebSettings::NotificationsEnabled, true);

//Enable OpenGL/webGL
settings->setAttribute(QWebSettings::AcceleratedCompositingEnabled, true);
settings->setAttribute(QWebSettings::WebGLEnabled, true);

settings->setAttribute(QWebSettings::PluginsEnabled, true);
settings->setAttribute(QWebSettings::JavaEnabled, false);

settings->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);

settings->setAttribute(QWebSettings::AutoLoadImages, true);

settings->setAttribute(QWebSettings::LocalContentCanAccessFileUrls, true);
settings->setAttribute(QWebSettings::LocalContentCanAccessRemoteUrls, true);

settings->setAttribute(QWebSettings::DnsPrefetchEnabled, true);
settings->setAttribute(QWebSettings::LocalStorageDatabaseEnabled, true);
settings->setAttribute(QWebSettings::JavascriptCanAccessClipboard, false);
settings->setAttribute(QWebSettings::ScrollAnimatorEnabled, true);

settings->setOfflineWebApplicationCachePath(pathApp + "appcache");
settings->setOfflineStoragePath(pathApp + "offlinestorage");
settings->setLocalStoragePath(pathApp + "storage");
settings->setIconDatabasePath(pathApp + "icons");

[SGaist]

As silly as it may sound, just go in the same folder where you built the plugin and call mingw32-make install unless make has an other name on your system ?

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@SGaist said:

As silly as it may sound, just go in the same folder where you built the plugin and call mingw32-make install unless make has an other name on your system ?

Makefile generated: http://pastebin.com/dNyYJLH6

After I tried this command mingw32-make && mingw32-make install, return this:

cd src\ && ( if not exist Makefile C:\Qt5.4.0\5.4\mingw491_32\bin\qmake.exe C:\projects\qtwebkit-plugins-master\src\src.pro -o Makefile ) && mingw32-make -f Makefile
mingw32-make[1]: Entering directory 'C:/projects/qtwebkit-plugins-master/src'
mingw32-make -f Makefile.Release
mingw32-make[2]: Entering directory 'C:/projects/qtwebkit-plugins-master/src'
g++ -Wl,-s -shared -Wl,-subsystem,windows -mthreads -Wl,--out-implib,C:\projects\qtwebkit-plugins-master\src..\bin\libqtwebkitplugins.a -o ..\bin\qtwebkitplugins.dll ../build/plugin.o ../build/spellcheck.o ../build/speller.o ../build/notificationpresenter.o ../build/qrc_notifications.o ../build/moc_qwebkitplatformplugin.o ../build/moc_plugin.o ../build/moc_spellcheck.o ../build/moc_notificationpresenter.o -lglu32 -lopengl32 -lgdi32 -luser32 -lhunspell -LC:/Qt5.4.0/5.4/mingw491_32/lib -lQt5Widgets -lQt5Gui -lQt5Network -lQt5Core
mingw32-make[2]: Leaving directory 'C:/projects/qtwebkit-plugins-master/src'
mingw32-make[1]: Leaving directory 'C:/projects/qtwebkit-plugins-master/src'
cd src\ && ( if not exist Makefile C:\Qt5.4.0\5.4\mingw491_32\bin\qmake.exe C:\projects\qtwebkit-plugins-master\src\src.pro -o Makefile ) && mingw32-make -f Makefile install
mingw32-make[1]: Entering directory 'C:/projects/qtwebkit-plugins-master/src'
mingw32-make -f Makefile.Release install
mingw32-make[2]: Entering directory 'C:/projects/qtwebkit-plugins-master/src'
mingw32-make[2]: Nothing to be done for 'install'.
mingw32-make[2]: Leaving directory 'C:/projects/qtwebkit-plugins-master/src'
mingw32-make[1]: Leaving directory 'C:/projects/qtwebkit-plugins-master/src'

I copied .dll and .a generated for mingw folder and tested my project with webview (with QT_DEBUG_PLUGINS = 1).

If have focus in <input type="text"> or <textarea> or use Notification Web API Application output tab (in QtCreator) returns:

Found metadata in lib C:/Qt5.4.0/5.4/mingw491_32/plugins/webkit/qtwebkitplugins.dll, metadata=
{
    "IID": "org.qtwebkit.QtWebKit.QtWebKitPlugin",
    "MetaData": {
    },
    "className": "QtWebKitPlugin",
    "debug": false,
    "version": 328704
}


loaded library "C:/Qt5.4.0/5.4/mingw491_32/plugins/webkit/qtwebkitplugins.dll"
QLibraryPrivate::unload succeeded on "C:/Qt5.4.0/5.4/mingw491_32/plugins/webkit/qtwebkitplugins.dll" 
QSystemTrayIcon::setVisible: No Icon set

It seems to me that the .dll is loaded, it just is not working. What did I do wrong?

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I solved

For this work in QT5.4+ is necessary to modified the qwebkitplatformplugin.h file

Change this:

QT_BEGIN_NAMESPACE
Q_DECLARE_INTERFACE(QWebKitPlatformPlugin, "com.nokia.Qt.WebKit.PlatformPlugin/1.9");

By this:

QT_BEGIN_NAMESPACE
Q_DECLARE_INTERFACE(QWebKitPlatformPlugin, "org.qt-project.Qt.WebKit.PlatformPlugin/1.9");

If needed compatibility with QT-4.8 change the code for this:

QT_BEGIN_NAMESPACE
#if QT_VERSION >= 0x050200
Q_DECLARE_INTERFACE(QWebKitPlatformPlugin, "org.qt-project.Qt.WebKit.PlatformPlugin/1.9")
#else
Q_DECLARE_INTERFACE(QWebKitPlatformPlugin, "com.nokia.Qt.WebKit.PlatformPlugin/1.9")
#endif
QT_END_NAMESPACE

I send a pull-request https://github.com/QupZilla/qtwebkit-plugins/pull/4 in repository

[SGaist]

Good catch !

Thanks for sharing your findings.

One last thing to do is mark the thread as solved so other forum users may know as solution has been found :)

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@SGaist said:

One last thing to do is mark the thread as solved

How to do it? Nothing appears but the editing buttons and sharing on social networks.

Thanks.

[SGaist]

Don't you have somewhere on the page a "Mark Solved" button ? Or Topic Tools -> Mark Solved ?

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@SGaist No, I migrated my account "qt-project.org/" and I think merge it with the account that already existed in "qt.io", perhaps the account has not been fully active.

See images:

[SGaist]

Strange… Let's check with @tekojo tomorrow

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@SGaist said:

Strange… Let's check with @tekojo tomorrow

Thanks!

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@SGaist said:

Strange… Let's check with @tekojo tomorrow

I discovered, your account is moderator type (I think), my account is a normal user, so I'm not such a function, but @tekojo had an idea to use "tags" instead of this function, see: https://bugreports.qt.io/browse/QTWEBSITE-631