path: root/src/ephy-link-action.c

/*
 *  Copyright (C) 2004 Christian Persch
 *  Copyright (C) 2005 Philip Langdale
 *
 *  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, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-link-action.h"
#include "ephy-link.h"

#include "ephy-debug.h"
#include "ephy-gui.h"

#include <gtk/gtkbutton.h>
#include <gtk/gtkmain.h>
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkmenutoolbutton.h>

static GObjectClass *parent_class;

static gboolean
proxy_button_press_event_cb (GtkButton *button,
                   GdkEventButton *event,
                   EphyLinkAction *action)
{
    if (event->button == 2)
    {
        gtk_button_pressed(button);
    }

    return FALSE;
}

static gboolean
proxy_button_release_event_cb (GtkButton *button,
                   GdkEventButton *event,
                   EphyLinkAction *action)
{
    /**
     * We do not use ephy_gui_is_middle_click() here because
     * that also catches ctrl + left_click which already
     * triggers an activate event for all proxies.
     */
    if (event->button == 2)
    {
        gtk_button_released(button);
    }

    return FALSE;
}

static GtkWidget *
get_event_widget (GtkWidget *proxy)
{
    GtkWidget *widget;

    /**
     * Finding the interesting widget requires internal knowledge of
     * the widgets in question. This can't be helped, but by keeping
     * the sneaky code in one place, it can easily be updated.
     */
    if (GTK_IS_MENU_ITEM (proxy))
    {
        /* Menu items already forward middle clicks */
        widget = NULL;
    }
    else if (GTK_IS_MENU_TOOL_BUTTON (proxy))
    {
        /**
         * The menu tool button's button is the first child
         * of the child hbox.
         */
        GtkContainer *container =
            GTK_CONTAINER (gtk_bin_get_child (GTK_BIN (proxy)));
        widget = GTK_WIDGET (gtk_container_get_children (container)->data);
    }
    else if (GTK_IS_TOOL_BUTTON (proxy))
    {
        /* The tool button's button is the direct child */
        widget = gtk_bin_get_child (GTK_BIN (proxy));
    }
    else if (GTK_IS_BUTTON (proxy))
    {
        widget = proxy;
    }
    else
    {
        /* Don't touch anything we don't know about */
        widget = NULL;
    }

    return widget;
}

static void
ephy_link_action_connect_proxy (GtkAction *action, GtkWidget *proxy)
{
    GtkWidget *widget;

    LOG ("Connect link action proxy");

    widget = get_event_widget(proxy);
    if (widget)
    {
        g_signal_connect (widget, "button-press-event",
                  G_CALLBACK (proxy_button_press_event_cb),
                  action);
        g_signal_connect (widget, "button-release-event",
                  G_CALLBACK (proxy_button_release_event_cb),
                  action);
    }

    GTK_ACTION_CLASS (parent_class)->connect_proxy (action, proxy);
}

static void
ephy_link_action_disconnect_proxy (GtkAction *action, GtkWidget *proxy)
{
    GtkWidget *widget;

    LOG ("Disconnect link action proxy");

    widget = get_event_widget(proxy);
    if (widget)
    {
        g_signal_handlers_disconnect_by_func (widget,
                              G_CALLBACK (proxy_button_press_event_cb),
                              action);
        g_signal_handlers_disconnect_by_func (widget,
                              G_CALLBACK (proxy_button_release_event_cb),
                              action);
    }

    GTK_ACTION_CLASS (parent_class)->disconnect_proxy (action, proxy);
}

static void
ephy_link_action_class_init (EphyLinkActionClass *class)
{
    GtkActionClass *action_class = GTK_ACTION_CLASS (class);

    parent_class = g_type_class_peek_parent (class);

    action_class->connect_proxy = ephy_link_action_connect_proxy;
    action_class->disconnect_proxy = ephy_link_action_disconnect_proxy;
}

GType
ephy_link_action_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0))
    {
        static const GTypeInfo our_info =
        {
            sizeof (EphyLinkActionClass),
            NULL, /* base_init */
            NULL, /* base_finalize */
            (GClassInitFunc) ephy_link_action_class_init,
            NULL,
            NULL, /* class_data */
            sizeof (EphyLinkAction),
            0,   /* n_preallocs */
            NULL /* instance_init */
        };
        static const GInterfaceInfo link_info = 
        {
            NULL,
            NULL,
            NULL
        };

        type = g_type_register_static (GTK_TYPE_ACTION,
                           "EphyLinkAction",
                           &our_info, G_TYPE_FLAG_ABSTRACT);
        g_type_add_interface_static (type,
                         EPHY_TYPE_LINK,
                         &link_info);
    }

    return type;
}

GType
ephy_link_action_group_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0))
    {
        static const GTypeInfo our_info =
        {
            sizeof (EphyLinkActionGroupClass),
            NULL, /* base_init */
            NULL, /* base_finalize */
            NULL, /* class_init */
            NULL,
            NULL, /* class_data */
            sizeof (EphyLinkActionGroup),
            0,   /* n_preallocs */
            NULL /* instance_init */
        };
        static const GInterfaceInfo link_info = 
        {
            NULL,
            NULL,
            NULL
        };

        type = g_type_register_static (GTK_TYPE_ACTION_GROUP,
                           "EphyLinkActionGroup",
                           &our_info, 0);
        g_type_add_interface_static (type,
                         EPHY_TYPE_LINK,
                         &link_info);
    }

    return type;
}

EphyLinkActionGroup *
ephy_link_action_group_new (const char * name)
{
    return g_object_new (EPHY_TYPE_LINK_ACTION_GROUP,
                 "name", name,
                 NULL);
}