path: root/src/bookmarks/ephy-topic-action.c

/*
 *  Copyright © 2003, 2004 Marco Pesenti Gritti
 *  Copyright © 2003, 2004 Christian Persch
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-topic-action.h"
#include "ephy-node.h"
#include "ephy-node-common.h"
#include "ephy-nodes-cover.h"
#include "ephy-bookmarks.h"
#include "ephy-bookmarks-ui.h"
#include "ephy-bookmarks-menu.h"
#include "ephy-shell.h"
#include "ephy-gui.h"
#include "ephy-debug.h"
#include "ephy-dnd.h"

#include <glib/gi18n.h>
#include <gtk/gtkwidget.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkbutton.h>
#include <gtk/gtkstock.h>
#include <gtk/gtkimage.h>
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkimagemenuitem.h>
#include <gtk/gtkseparatormenuitem.h>
#include <gtk/gtktogglebutton.h>
#include <gtk/gtkarrow.h>
#include <gtk/gtkmain.h>
#include <libgnomevfs/gnome-vfs-uri.h>
#include <string.h>

static const GtkTargetEntry dest_drag_types[] = {
    { EPHY_DND_URL_TYPE, 0, 0},
};

#define TOOLITEM_WIDTH_CHARS    24
#define MENUITEM_WIDTH_CHARS    32
#define LABEL_WIDTH_CHARS       32

#define EPHY_TOPIC_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_TOPIC_ACTION, EphyTopicActionPrivate))

struct _EphyTopicActionPrivate
{
    EphyNode *node;
    GtkUIManager *manager;
    guint merge_id;
};

enum
{
    PROP_0,
    PROP_TOPIC,
    PROP_MANAGER
};

static GObjectClass *parent_class;

static void
drag_data_received_cb (GtkWidget *widget,
               GdkDragContext *context,
               gint x,
               gint y,
               GtkSelectionData *selection_data,
               guint info,
               guint time,
               GtkAction *action)
{  
    const char *data;
    EphyBookmarks *bookmarks;
    EphyNode *bookmark, *topic;
    gchar **netscape_url;
    
    topic = ephy_topic_action_get_topic (EPHY_TOPIC_ACTION (action));
    
    data = (char *)selection_data->data;
    bookmarks = ephy_shell_get_bookmarks (ephy_shell);
    
    netscape_url = g_strsplit (data, "\n", 2);
    if (!netscape_url || !netscape_url[0])
    {
        g_strfreev (netscape_url);
        gtk_drag_finish (context, FALSE, FALSE, time);
        return;
    }

    bookmark = ephy_bookmarks_find_bookmark (bookmarks, netscape_url[0]);
    if (bookmark == NULL)
    {
        bookmark = ephy_bookmarks_add (bookmarks, netscape_url[1], netscape_url[0]);
    }

    g_strfreev (netscape_url);
    
    if (bookmark != NULL)
    {
        ephy_bookmarks_set_keyword (bookmarks, topic, bookmark);
        gtk_drag_finish (context, TRUE, FALSE, time);
    }
    else
    {
        gtk_drag_finish (context, FALSE, FALSE, time);
    }
}

static GtkWidget *
create_tool_item (GtkAction *action)
{
    GtkWidget *item;
    GtkWidget *button;
    GtkWidget *arrow;
    GtkWidget *hbox;
    GtkWidget *label;

    item = GTK_ACTION_CLASS (parent_class)->create_tool_item (action);

    button = gtk_toggle_button_new ();
    gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
    gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
    gtk_widget_show (button);
    gtk_container_add (GTK_CONTAINER (item), button);
    g_object_set_data (G_OBJECT (item), "button", button);
    g_object_set_data (G_OBJECT (button), "gtk-action", action);

    arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_NONE);
    gtk_widget_show (arrow);

    hbox = gtk_hbox_new (FALSE, 3);
    gtk_widget_show (hbox);
    gtk_container_add (GTK_CONTAINER (button), hbox);

    label = gtk_label_new (NULL);
    gtk_label_set_ellipsize (GTK_LABEL (label), PANGO_ELLIPSIZE_END);
    gtk_label_set_max_width_chars (GTK_LABEL (label), TOOLITEM_WIDTH_CHARS);
    gtk_widget_show (label);
    gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);
    gtk_box_pack_start (GTK_BOX (hbox), arrow, TRUE, TRUE, 0);
    g_object_set_data (G_OBJECT (item), "label", label);

    return item;
}

static void
ephy_topic_action_sync_label (GtkAction *action,
                  GParamSpec *pspec,
                  GtkWidget *proxy)
{
    GtkWidget *label = NULL;
    GValue value = { 0, };
    const char *label_text;

    g_value_init (&value, G_TYPE_STRING);
    g_object_get_property (G_OBJECT (action), "label", &value);

    label_text = g_value_get_string (&value);

    if (GTK_IS_TOOL_ITEM (proxy))
    {
        label = GTK_WIDGET (g_object_get_data (G_OBJECT (proxy), "label"));
    }
    else if (GTK_IS_MENU_ITEM (proxy))
    {
        label = GTK_BIN (proxy)->child;
    }
    else
    {
        g_warning ("Unknown widget");
        return;
    }

    g_return_if_fail (label != NULL);

    if (label_text)
    {
        gtk_label_set_label (GTK_LABEL (label), label_text);
    }
    
    g_value_unset (&value);
}

static GtkWidget *
get_popup (EphyTopicAction *action)
{
    EphyTopicActionPrivate *priv = action->priv;
    char path[40];

    g_snprintf (path, sizeof (path), "/PopupTopic%ld",
            (long int) ephy_node_get_id (action->priv->node));

    if (priv->merge_id == 0)
    {
        GString *popup_menu_string;

        popup_menu_string = g_string_new (NULL);
        g_string_append_printf (popup_menu_string, "<ui><popup name=\"%s\">", path + 1);

        ephy_bookmarks_menu_build (popup_menu_string, priv->node);
        g_string_append (popup_menu_string, "</popup></ui>");

        priv->merge_id = gtk_ui_manager_add_ui_from_string
            (priv->manager, popup_menu_string->str,
             popup_menu_string->len, 0);

        g_string_free (popup_menu_string, TRUE);
    }

    return gtk_ui_manager_get_widget (priv->manager, path);
}

static void
erase_popup (EphyTopicAction *action)
{
    EphyTopicActionPrivate *priv = action->priv;

    if (priv->merge_id != 0)
    {
        gtk_ui_manager_remove_ui (priv->manager, priv->merge_id);
        priv->merge_id = 0;
    }
}

static void
child_added_cb (EphyNode *node, EphyNode *child, GObject *object)
{
    EphyTopicAction *action = EPHY_TOPIC_ACTION (object);
    erase_popup (action);
}

static void
child_changed_cb (EphyNode *node,
          EphyNode *child,
          guint property,
          GObject *object)
{
    EphyTopicAction *action = EPHY_TOPIC_ACTION (object);

    erase_popup (action);
}

static void
child_removed_cb (EphyNode *node,
          EphyNode *child,
          guint index,
          GObject *object)
{
    EphyTopicAction *action = EPHY_TOPIC_ACTION (object);

    erase_popup (action);
}

static void
menu_destroy_cb (GtkWidget *menuitem,
         gpointer user_data)
{
    /* Save the submenu from similar destruction,
     * because it doesn't rightly belong to this menuitem. */
    gtk_menu_item_remove_submenu (GTK_MENU_ITEM (menuitem));
}

static void
menu_init_cb (GtkWidget *menuitem,
          EphyTopicAction *action)
{
    if (gtk_menu_item_get_submenu (GTK_MENU_ITEM (menuitem)) == NULL)
    {
        GtkWidget *popup;

        popup = get_popup (action);
        gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), popup);
        g_signal_connect (menuitem, "destroy",
                  G_CALLBACK (menu_destroy_cb), NULL);
    }
}

static void
button_deactivate_cb (GtkMenuShell *ms,
              GtkWidget *button)
{
    GtkWidget *window = gtk_widget_get_ancestor (button, GTK_TYPE_WINDOW);

    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), FALSE);
    gtk_button_released (GTK_BUTTON (button));

    g_object_set_data (G_OBJECT (window),
               "active-topic-action-button", NULL);

    /*
        Currently, GObject leaks connection IDs created with
        g_signal_connect_object ()
        See glib bug #118536
    */
    g_signal_handlers_disconnect_by_func(ms, button_deactivate_cb, button);
}

static void
button_toggled_cb (GtkWidget *button,
           EphyTopicAction *action)
{
    if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
    {
        GtkWidget *popup;
        GtkWidget *window;

        window = gtk_widget_get_ancestor (button, GTK_TYPE_WINDOW);

        g_object_set_data (G_OBJECT (window),
                   "active-topic-action-button",
                   button);

        popup = get_popup (action);

        g_signal_connect_object (popup, "deactivate",
                     G_CALLBACK (button_deactivate_cb), button, 0);

        /* FIXME: ephy_gui_menu_position_menu_on_toolbar? */
        gtk_menu_popup (GTK_MENU (popup), NULL, NULL,
                ephy_gui_menu_position_under_widget,
                button, 1, gtk_get_current_event_time ());
    }
}

static gboolean
button_release_cb (GtkWidget *button,
                   GdkEventButton *event,
           EphyTopicAction *action)
{
    if (event->button == 1)
    {
        gtk_toggle_button_set_active
            (GTK_TOGGLE_BUTTON (button), FALSE);
    }

    return FALSE;
}

static gboolean
button_press_cb (GtkWidget *button,
         GdkEventButton *event,
         EphyTopicAction *action)
{
    if (event->button == 1)
    {
        if (!gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
        {
            gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);

            return TRUE;
        }
    }

    return FALSE;
}

static gboolean
button_enter_cb (GtkWidget *button,
         GdkEventCrossing *event,
         EphyTopicAction *action)
{
    GtkWidget *window;
    GtkWidget *active_button;

    window = gtk_widget_get_ancestor (button, GTK_TYPE_WINDOW);
    active_button = g_object_get_data (G_OBJECT (window),
                       "active-topic-action-button");

    if (active_button &&
        active_button != button &&
        GTK_IS_TOGGLE_BUTTON (active_button) &&
        gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (active_button)))
    {
        EphyTopicAction *active_action;
        active_action = g_object_get_data (G_OBJECT (active_button),
                           "gtk-action");

        erase_popup (active_action);
        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (active_button), FALSE);
        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
    }

    return FALSE;
}

static void
connect_proxy (GtkAction *action,
           GtkWidget *proxy)
{
    GTK_ACTION_CLASS (parent_class)->connect_proxy (action, proxy);
    
    ephy_topic_action_sync_label (action, NULL, proxy);
    g_signal_connect_object (action, "notify::label",
                 G_CALLBACK (ephy_topic_action_sync_label), proxy, 0);

    if (GTK_IS_TOOL_ITEM (proxy))
    {
        GtkWidget *button;

        button = GTK_WIDGET (g_object_get_data (G_OBJECT (proxy), "button"));

        g_signal_connect (button, "toggled",
                  G_CALLBACK (button_toggled_cb), action);
        g_signal_connect (button, "button-press-event",
                  G_CALLBACK (button_press_cb), action);
        g_signal_connect (button, "button-release-event",
                  G_CALLBACK (button_release_cb), action);
        g_signal_connect (button, "enter-notify-event",
                  G_CALLBACK (button_enter_cb), action);
        /* FIXME: what about keyboard (toggled by Space) ? */

        g_signal_connect (button, "drag-data-received",
                  G_CALLBACK (drag_data_received_cb), action);
        gtk_drag_dest_set (button, GTK_DEST_DEFAULT_ALL, dest_drag_types,
                   G_N_ELEMENTS (dest_drag_types), GDK_ACTION_COPY);
    }
    else if (GTK_IS_MENU_ITEM (proxy))
    {
        g_signal_connect (proxy, "map",
                  G_CALLBACK (menu_init_cb), action);
    }
}

void
ephy_topic_action_updated (EphyTopicAction *action)
{
    EphyTopicActionPrivate *priv = action->priv;
    GValue value = { 0, };
    const char *title;
    int priority;
    
    g_return_if_fail (priv->node != NULL);
    
    priority = ephy_node_get_property_int 
        (priv->node, EPHY_NODE_KEYWORD_PROP_PRIORITY);
    
    if (priority == EPHY_NODE_ALL_PRIORITY)
    {
        title = _("Bookmarks");
    }
    else
    {
        title = ephy_node_get_property_string
            (priv->node, EPHY_NODE_KEYWORD_PROP_NAME);
    }
    
    g_value_init(&value, G_TYPE_STRING);
    g_value_set_static_string (&value, title);
    g_object_set_property (G_OBJECT (action), "label", &value);
    g_object_set_property (G_OBJECT (action), "tooltip", &value);
    g_value_unset (&value);
}

EphyNode *
ephy_topic_action_get_topic (EphyTopicAction *action)
{
    EphyTopicActionPrivate *priv = action->priv;

    return priv->node;
}

void
ephy_topic_action_set_topic (EphyTopicAction *action,
                 EphyNode *node)
{
    EphyTopicActionPrivate *priv = action->priv;
    GObject *object = G_OBJECT (action);

    g_return_if_fail (node != NULL);
    
    if (priv->node == node) return;

    if (priv->node != NULL)
    {
        ephy_node_signal_disconnect_object
            (priv->node, EPHY_NODE_CHILD_ADDED,
             (EphyNodeCallback) child_added_cb, object);
        ephy_node_signal_disconnect_object
            (priv->node, EPHY_NODE_CHILD_CHANGED,
             (EphyNodeCallback)child_changed_cb, object);
        ephy_node_signal_disconnect_object
            (priv->node, EPHY_NODE_CHILD_REMOVED,
             (EphyNodeCallback)child_removed_cb, object);
    }

    ephy_node_signal_connect_object (node, EPHY_NODE_CHILD_ADDED,
                     (EphyNodeCallback) child_added_cb,
                     object);
    ephy_node_signal_connect_object (node, EPHY_NODE_CHILD_CHANGED,
                     (EphyNodeCallback) child_changed_cb,
                     object);
    ephy_node_signal_connect_object (node, EPHY_NODE_CHILD_REMOVED,
                     (EphyNodeCallback) child_removed_cb,
                     object);

    priv->node = node;
    
    erase_popup (action);
    
    g_object_freeze_notify (object);
    g_object_notify (object, "topic");
    ephy_topic_action_updated (action);
    g_object_thaw_notify (object);
}

static void
ephy_topic_action_set_property (GObject *object,
                guint prop_id,
                const GValue *value,
                GParamSpec *pspec)
{
    EphyTopicAction *action = EPHY_TOPIC_ACTION (object);
    EphyTopicActionPrivate *priv = action->priv;

    switch (prop_id)
    {
        case PROP_TOPIC:
            ephy_topic_action_set_topic (action, g_value_get_pointer (value));
            break;
        case PROP_MANAGER:
            priv->manager = g_value_get_object (value);
            break;
    }
}

static void
ephy_topic_action_get_property (GObject *object,
                guint prop_id,
                GValue *value,
                GParamSpec *pspec)
{
    EphyTopicAction *action = EPHY_TOPIC_ACTION (object);
    EphyTopicActionPrivate *priv = action->priv;

    switch (prop_id)
    {
        case PROP_TOPIC:
            g_value_set_pointer (value, priv->node);
            break;
        case PROP_MANAGER:
            g_value_set_object (value, priv->manager);
            break;
    }
}

static void
ephy_topic_action_init (EphyTopicAction *action)
{
    EphyTopicActionPrivate *priv;

    priv = action->priv = EPHY_TOPIC_ACTION_GET_PRIVATE (action);
    
    priv->merge_id = 0;
    priv->node = NULL;
    priv->manager = NULL;
}

static void
ephy_topic_action_class_init (EphyTopicActionClass *class)
{
    GObjectClass *object_class = G_OBJECT_CLASS (class);
    GtkActionClass *action_class = GTK_ACTION_CLASS (class);

    parent_class = g_type_class_peek_parent (class);

    action_class->toolbar_item_type = GTK_TYPE_TOOL_ITEM;
    action_class->create_tool_item = create_tool_item;
    action_class->connect_proxy = connect_proxy;

    object_class->set_property = ephy_topic_action_set_property;
    object_class->get_property = ephy_topic_action_get_property;

    g_object_class_install_property (object_class,
                     PROP_TOPIC,
                     g_param_spec_pointer ("topic",
                                   "Topic",
                                   "Topic",
                                   G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB |
                                   G_PARAM_CONSTRUCT_ONLY));

    g_object_class_install_property (object_class,
                     PROP_MANAGER,
                     g_param_spec_object ("manager",
                                  "Manager",
                                  "UI Manager",
                                  GTK_TYPE_UI_MANAGER,
                                  G_PARAM_WRITABLE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB |
                                  G_PARAM_CONSTRUCT_ONLY));
    
    g_type_class_add_private (object_class, sizeof(EphyTopicActionPrivate));
}

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

    if (G_UNLIKELY (type == 0))
    {
        const GTypeInfo type_info =
        {
            sizeof (EphyTopicActionClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) ephy_topic_action_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,
            sizeof (EphyTopicAction),
            0, /* n_preallocs */
            (GInstanceInitFunc) ephy_topic_action_init,
        };

        type = g_type_register_static (GTK_TYPE_ACTION,
                           "EphyTopicAction",
                           &type_info, 0);
    }

    return type;
}

GtkAction *
ephy_topic_action_new (EphyNode *node,
               GtkUIManager *manager,
               const char *name)
{
    g_assert (name != NULL);

    return GTK_ACTION (g_object_new (EPHY_TYPE_TOPIC_ACTION,
                     "name", name,
                     "topic", node,
                     "manager", manager,
                     NULL));
}