/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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****************************************************************************/

#include "qgtk2theme.h"
#include "qgtk2dialoghelpers.h"
#include <QVariant>

#undef signals
#include <gtk/gtk.h>

#include <X11/Xlib.h>

QT_BEGIN_NAMESPACE

const char *QGtk2Theme::name = "gtk2";

static QString gtkSetting(const gchar *propertyName)
{
    GtkSettings *settings = gtk_settings_get_default();
    gchararray value;
    g_object_get(settings, propertyName, &value, NULL);
    QString str = QString::fromUtf8(value);
    g_free(value);
    return str;
}

QGtk2Theme::QGtk2Theme()
{
    // gtk_init will reset the Xlib error handler, and that causes
    // Qt applications to quit on X errors. Therefore, we need to manually restore it.
    int (*oldErrorHandler)(Display *, XErrorEvent *) = XSetErrorHandler(NULL);

    gtk_init(0, 0);

    XSetErrorHandler(oldErrorHandler);
}

QVariant QGtk2Theme::themeHint(QPlatformTheme::ThemeHint hint) const
{
    switch (hint) {
    case QPlatformTheme::SystemIconThemeName:
        return QVariant(gtkSetting("gtk-icon-theme-name"));
    case QPlatformTheme::SystemIconFallbackThemeName:
        return QVariant(gtkSetting("gtk-fallback-icon-theme"));
    default:
        return QGnomeTheme::themeHint(hint);
    }
}

QString QGtk2Theme::gtkFontName() const
{
    QString cfgFontName = gtkSetting("gtk-font-name");
    if (!cfgFontName.isEmpty())
        return cfgFontName;
    return QGnomeTheme::gtkFontName();
}

bool QGtk2Theme::usePlatformNativeDialog(DialogType type) const
{
    switch (type) {
    case ColorDialog:
        return true;
    case FileDialog:
        return true;
    case FontDialog:
        return true;
    default:
        return false;
    }
}

QPlatformDialogHelper *QGtk2Theme::createPlatformDialogHelper(DialogType type) const
{
    switch (type) {
    case ColorDialog:
        return new QGtk2ColorDialogHelper;
    case FileDialog:
        return new QGtk2FileDialogHelper;
    case FontDialog:
        return new QGtk2FontDialogHelper;
    default:
        return 0;
    }
}

QT_END_NAMESPACE
