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

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright © 2003, 2004 Marco Pesenti Gritti
 *  Copyright © 2003, 2004 Christian Persch
 *  Copyright © 2008 Jan Alonzo
 *  Copyright © 2009 Igalia S.L.
 *
 *  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.
 *
 */

#include "config.h"
#include "ephy-navigation-action.h"

#include "ephy-debug.h"
#include "ephy-embed-container.h"
#include "ephy-embed-shell.h"
#include "ephy-embed-utils.h"
#include "ephy-favicon-cache.h"
#include "ephy-gui.h"
#include "ephy-history.h"
#include "ephy-link.h"
#include "ephy-shell.h"
#include "ephy-type-builtins.h"
#include "ephy-window.h"

#include <gtk/gtk.h>
#include <webkit/webkit.h>

#define HISTORY_ITEM_DATA_KEY     "HistoryItem"
#define URL_DATA_KEY              "GoURL"

#define EPHY_NAVIGATION_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_NAVIGATION_ACTION, EphyNavigationActionPrivate))

typedef enum
{
    WEBKIT_HISTORY_BACKWARD,
    WEBKIT_HISTORY_FORWARD
} WebKitHistoryType;

struct _EphyNavigationActionPrivate
{
    EphyWindow *window;
    EphyNavigationDirection direction;
    char *arrow_tooltip;
    guint statusbar_cid;
};

enum
{
    PROP_0,
    PROP_ARROW_TOOLTIP,
    PROP_DIRECTION,
    PROP_WINDOW
};

static void ephy_navigation_action_init       (EphyNavigationAction *action);
static void ephy_navigation_action_class_init (EphyNavigationActionClass *class);

G_DEFINE_TYPE (EphyNavigationAction, ephy_navigation_action, EPHY_TYPE_LINK_ACTION)

#define MAX_LABEL_LENGTH 48

static GtkWidget *
new_history_menu_item (const char *origtext,
               const char *address)
{
    EphyFaviconCache *cache;
    EphyHistory *history;
    GtkWidget *item, *image;
    GdkPixbuf *icon = NULL;
    GtkLabel *label;
    const char *icon_address;

    g_return_val_if_fail (address != NULL && origtext != NULL, NULL);

    item = gtk_image_menu_item_new_with_label (origtext);

    label = GTK_LABEL (GTK_BIN (item)->child);
    gtk_label_set_ellipsize (label, PANGO_ELLIPSIZE_END);
    gtk_label_set_max_width_chars (label, MAX_LABEL_LENGTH);

    history = EPHY_HISTORY
        (ephy_embed_shell_get_global_history (embed_shell));
    icon_address = ephy_history_get_icon (history, address);

    cache = EPHY_FAVICON_CACHE
        (ephy_embed_shell_get_favicon_cache (embed_shell));
    icon = ephy_favicon_cache_get (cache, icon_address);

    if (icon != NULL)
    {
        image = gtk_image_new_from_pixbuf (icon);
        gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (item), image);
        gtk_widget_show (image);
        g_object_unref (icon);
    }

    gtk_widget_show (item);

    return item;
}

static void
activate_back_or_forward_menu_item_cb (GtkWidget *menuitem,
                       EphyNavigationAction *action)
{
    WebKitWebHistoryItem *item;
    EphyEmbed *embed;

    embed = ephy_embed_container_get_active_child (EPHY_EMBED_CONTAINER (action->priv->window));
    g_return_if_fail (embed != NULL);

    if (ephy_gui_is_middle_click ())
    {
        embed = ephy_link_open (EPHY_LINK (action), "about:blank", NULL,
                        EPHY_LINK_NEW_TAB);
        g_return_if_fail (embed != NULL);
    }

    item = (WebKitWebHistoryItem*)g_object_get_data (G_OBJECT (menuitem), HISTORY_ITEM_DATA_KEY);
    g_return_if_fail (item != NULL);

    webkit_web_view_go_to_back_forward_item (EPHY_GET_WEBKIT_WEB_VIEW_FROM_EMBED (embed), item);
}

static void
select_menu_item_cb (GtkWidget *menuitem,
                 EphyNavigationAction *action)
{
    const char *url;
    GtkWidget *statusbar;
    WebKitWebHistoryItem *item;

    item = (WebKitWebHistoryItem*)g_object_get_data (G_OBJECT (menuitem), HISTORY_ITEM_DATA_KEY);
    if (item)
    {
        url = webkit_web_history_item_get_uri (item);
    }
    else
    {
        url = g_object_get_data (G_OBJECT (menuitem), URL_DATA_KEY);
        g_return_if_fail (url != NULL);
    }

    statusbar = ephy_window_get_statusbar (action->priv->window);

    gtk_statusbar_push (GTK_STATUSBAR (statusbar), action->priv->statusbar_cid, url);
}

static void
deselect_menu_item_cb (GtkWidget *menuitem,
                   EphyNavigationAction *action)
{
    GtkWidget *statusbar;

    statusbar = ephy_window_get_statusbar (action->priv->window);

    gtk_statusbar_pop (GTK_STATUSBAR (statusbar), action->priv->statusbar_cid);
}

static void
activate_up_menu_item_cb (GtkWidget *menuitem,
              EphyNavigationAction *action)
{
    EphyEmbed *embed;
    char *url;

    embed = ephy_embed_container_get_active_child (EPHY_EMBED_CONTAINER (action->priv->window));
    g_return_if_fail (embed != NULL);

    url = g_object_get_data (G_OBJECT (menuitem), URL_DATA_KEY);
    g_return_if_fail (url != NULL);

    ephy_link_open (EPHY_LINK (action), url, NULL,
            ephy_gui_is_middle_click () ? EPHY_LINK_NEW_TAB : 0);
}

static GList*
webkit_construct_history_list (WebKitWebView *web_view, WebKitHistoryType hist_type) 
{
    WebKitWebBackForwardList *web_back_forward_list;
    GList *webkit_items;

    web_back_forward_list = webkit_web_view_get_back_forward_list (web_view);

    if (hist_type == WEBKIT_HISTORY_FORWARD)
        webkit_items = webkit_web_back_forward_list_get_forward_list_with_limit (web_back_forward_list,
                                             EPHY_WEBKIT_BACK_FORWARD_LIMIT);
    else
        webkit_items = webkit_web_back_forward_list_get_back_list_with_limit (web_back_forward_list,
                                              EPHY_WEBKIT_BACK_FORWARD_LIMIT);

    return webkit_items;
}

static GtkWidget *
build_back_or_forward_menu (EphyNavigationAction *action)
{
    EphyWindow *window = action->priv->window;
    GtkMenuShell *menu;
    EphyEmbed *embed;
    GList *list, *l;
    WebKitWebView *web_view;

    embed = ephy_embed_container_get_active_child (EPHY_EMBED_CONTAINER (window));
    g_return_val_if_fail (embed != NULL, NULL);

    web_view = EPHY_GET_WEBKIT_WEB_VIEW_FROM_EMBED (embed);
    g_return_val_if_fail (web_view != NULL, NULL);

    if (action->priv->direction == EPHY_NAVIGATION_DIRECTION_BACK)
        list = webkit_construct_history_list (web_view,
                              WEBKIT_HISTORY_BACKWARD);
    else
        list = webkit_construct_history_list (web_view,
                              WEBKIT_HISTORY_FORWARD);

    menu = GTK_MENU_SHELL (gtk_menu_new ());

    l = list;

    for (l = list; l != NULL; l = l->next)
    {
        GtkWidget *item;
        WebKitWebHistoryItem *hitem;
        const char *title, *url;

        hitem = (WebKitWebHistoryItem*)l->data;
        url = webkit_web_history_item_get_uri (hitem);
        title = webkit_web_history_item_get_title (hitem);

        item = new_history_menu_item (title ? title : url, url);

        g_object_set_data_full (G_OBJECT (item), HISTORY_ITEM_DATA_KEY,
                    g_object_ref (hitem), g_object_unref);

        g_signal_connect (item, "activate",
                  G_CALLBACK (activate_back_or_forward_menu_item_cb),
                  action);
        g_signal_connect (item, "select",
                  G_CALLBACK (select_menu_item_cb),
                  action);
        g_signal_connect (item, "deselect",
                  G_CALLBACK (deselect_menu_item_cb),
                  action);

        gtk_menu_shell_append (menu, item);
        gtk_widget_show_all (item);
    }
    
    g_list_free (list);

    return GTK_WIDGET (menu);
}

static GtkWidget *
build_up_menu (EphyNavigationAction *action)
{
    EphyWindow *window = action->priv->window;
    EphyEmbed *embed;
    EphyHistory *history;
    GtkMenuShell *menu;
    GtkWidget *item;
    GSList *list, *l;
    char *url;

    embed = ephy_embed_container_get_active_child (EPHY_EMBED_CONTAINER (window));
    g_return_val_if_fail (embed != NULL, NULL);

    menu = GTK_MENU_SHELL (gtk_menu_new ());

        history = EPHY_HISTORY
        (ephy_embed_shell_get_global_history (embed_shell));

    list = ephy_web_view_get_go_up_list (EPHY_GET_EPHY_WEB_VIEW_FROM_EMBED (embed));

    for (l = list; l != NULL; l = l->next)
    {
        EphyNode *node;
        const char *title = NULL;

        url = l->data;

        if (url == NULL) continue;

        node = ephy_history_get_page (history, url);
        if (node != NULL)
        {
            title = ephy_node_get_property_string (node, EPHY_NODE_PAGE_PROP_TITLE);
        }

        item = new_history_menu_item (title ? title : url, url);

        g_object_set_data_full (G_OBJECT (item), URL_DATA_KEY, url,
                    (GDestroyNotify) g_free);
        g_signal_connect (item, "activate",
                  G_CALLBACK (activate_up_menu_item_cb), action);
        g_signal_connect (item, "select",
                  G_CALLBACK (select_menu_item_cb), action);
        g_signal_connect (item, "deselect",
                  G_CALLBACK (deselect_menu_item_cb), action);

        gtk_menu_shell_append (menu, item);
        gtk_widget_show (item);
    }

    /* the list data has been consumed */
    g_slist_free (list);

    return GTK_WIDGET (menu);
}

static void
menu_activated_cb (GtkMenuToolButton *button,
           EphyNavigationAction *action)
{
    GtkWidget *menu = NULL;

    LOG ("menu_activated_cb dir %d", action->priv->direction);

    switch (action->priv->direction)
    {
        case EPHY_NAVIGATION_DIRECTION_UP:
            menu = build_up_menu (action);
            break;
        case EPHY_NAVIGATION_DIRECTION_FORWARD:
        case EPHY_NAVIGATION_DIRECTION_BACK:
            menu = build_back_or_forward_menu (action);
            break;
        default:
            g_assert_not_reached ();
            break;
    }

    gtk_menu_tool_button_set_menu (button, menu);
}

static void
connect_proxy (GtkAction *gaction,
           GtkWidget *proxy)
{
    LOG ("Connect navigation action proxy");

    if (GTK_IS_MENU_TOOL_BUTTON (proxy))
    {
        EphyNavigationAction *action = EPHY_NAVIGATION_ACTION (gaction);
        EphyNavigationActionPrivate *priv = action->priv;
        GtkMenuToolButton *button = GTK_MENU_TOOL_BUTTON (proxy);
        GtkWidget *menu;

        /* set dummy menu so the arrow gets sensitive */
        menu = gtk_menu_new ();
        gtk_menu_tool_button_set_menu (button, menu);
        gtk_menu_tool_button_set_arrow_tooltip_text (button, priv->arrow_tooltip);

        g_signal_connect (proxy, "show-menu",
                  G_CALLBACK (menu_activated_cb), gaction);
    }

    GTK_ACTION_CLASS (ephy_navigation_action_parent_class)->connect_proxy (gaction, proxy);
}

static void
ephy_navigation_action_activate (GtkAction *gtk_action)
{
    EphyNavigationAction *action = EPHY_NAVIGATION_ACTION (gtk_action);
    EphyWindow *window = action->priv->window;
    EphyEmbed *embed;
    WebKitWebView *web_view;

    embed = ephy_embed_container_get_active_child (EPHY_EMBED_CONTAINER (window));
    g_return_if_fail (embed != NULL);

    web_view = EPHY_GET_WEBKIT_WEB_VIEW_FROM_EMBED (embed);

    if (action->priv->direction == EPHY_NAVIGATION_DIRECTION_BACK)
    {
        if (ephy_gui_is_middle_click ())
        {
            embed = ephy_shell_new_tab (ephy_shell_get_default (),
                            EPHY_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (embed))),
                            embed,
                            NULL,
                            EPHY_NEW_TAB_IN_EXISTING_WINDOW);
            web_view = EPHY_GET_WEBKIT_WEB_VIEW_FROM_EMBED (embed);
        }
        webkit_web_view_go_back (web_view);
    }
    else if (action->priv->direction == EPHY_NAVIGATION_DIRECTION_FORWARD)
    {
        if (ephy_gui_is_middle_click ())
        {
            const char *forward_uri;
            WebKitWebHistoryItem *forward_item;
            WebKitWebBackForwardList *history;

            /* Forward history is not copied when opening
               a new tab, so get the forward URI manually
               and load it */
            history = webkit_web_view_get_back_forward_list (EPHY_GET_WEBKIT_WEB_VIEW_FROM_EMBED (embed));
            forward_item = webkit_web_back_forward_list_get_forward_item (history);
            forward_uri = webkit_web_history_item_get_original_uri (forward_item);

            embed = ephy_shell_new_tab (ephy_shell_get_default (),
                            EPHY_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (embed))),
                            embed,
                            NULL,
                            EPHY_NEW_TAB_IN_EXISTING_WINDOW);

            web_view = EPHY_GET_WEBKIT_WEB_VIEW_FROM_EMBED (embed);
            webkit_web_view_load_uri (web_view, forward_uri);
        } else
            webkit_web_view_go_forward (EPHY_GET_WEBKIT_WEB_VIEW_FROM_EMBED (embed));
    }
    else if (action->priv->direction == EPHY_NAVIGATION_DIRECTION_UP)
    {
        GSList *up_list;
        
        up_list = ephy_web_view_get_go_up_list (EPHY_GET_EPHY_WEB_VIEW_FROM_EMBED (embed));
        ephy_link_open (EPHY_LINK (action),
                up_list->data,
                NULL,
                ephy_gui_is_middle_click () ? EPHY_LINK_NEW_TAB : 0);
        g_slist_free (up_list);
    }
}

static void
ephy_navigation_action_init (EphyNavigationAction *action)
{
    action->priv = EPHY_NAVIGATION_ACTION_GET_PRIVATE (action);
}

static void
ephy_navigation_action_finalize (GObject *object)
{
    EphyNavigationAction *action = EPHY_NAVIGATION_ACTION (object);

    g_free (action->priv->arrow_tooltip);

    G_OBJECT_CLASS (ephy_navigation_action_parent_class)->finalize (object);
}

static void
ephy_navigation_action_set_property (GObject *object,
                     guint prop_id,
                     const GValue *value,
                     GParamSpec *pspec)
{
    EphyNavigationAction *nav = EPHY_NAVIGATION_ACTION (object);

    switch (prop_id)
    {
        case PROP_ARROW_TOOLTIP:
            nav->priv->arrow_tooltip = g_value_dup_string (value);
            g_object_notify (object, "tooltip");
            break;
        case PROP_DIRECTION:
            nav->priv->direction = g_value_get_int (value);
            break;
        case PROP_WINDOW:
            {
                GtkWidget *statusbar;

                nav->priv->window = EPHY_WINDOW (g_value_get_object (value));

                /* statusbar context to display current selected item */
                statusbar = ephy_window_get_statusbar (nav->priv->window);

                nav->priv->statusbar_cid = gtk_statusbar_get_context_id (
                                GTK_STATUSBAR (statusbar), 
                                "navigation_message");
            }
            break;
    }
}

static void
ephy_navigation_action_get_property (GObject *object,
                     guint prop_id,
                     GValue *value,
                     GParamSpec *pspec)
{
    EphyNavigationAction *nav = EPHY_NAVIGATION_ACTION (object);

    switch (prop_id)
    {
        case PROP_ARROW_TOOLTIP:
            g_value_set_string (value, nav->priv->arrow_tooltip);
            break;
        case PROP_DIRECTION:
            g_value_set_int (value, nav->priv->direction);
            break;
        case PROP_WINDOW:
            g_value_set_object (value, nav->priv->window);
            break;
    }
}

static void
ephy_navigation_action_class_init (EphyNavigationActionClass *class)
{
    GObjectClass *object_class = G_OBJECT_CLASS (class);
    GtkActionClass *action_class = GTK_ACTION_CLASS (class);

    object_class->finalize = ephy_navigation_action_finalize;
    object_class->set_property = ephy_navigation_action_set_property;
    object_class->get_property = ephy_navigation_action_get_property;

    action_class->toolbar_item_type = GTK_TYPE_MENU_TOOL_BUTTON;
    action_class->connect_proxy = connect_proxy;
    action_class->activate = ephy_navigation_action_activate;

    g_object_class_install_property (object_class,
                     PROP_ARROW_TOOLTIP,
                     g_param_spec_string ("arrow-tooltip", NULL, NULL,
                                  NULL,
                                  G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB));

    g_object_class_install_property (object_class,
                     PROP_DIRECTION,
                     g_param_spec_int ("direction", NULL, NULL,
                               0,
                               G_MAXINT,
                               0,
                               G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB));
    g_object_class_install_property (object_class,
                     PROP_WINDOW,
                     g_param_spec_object ("window", NULL, NULL,
                                  G_TYPE_OBJECT,
                                  G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB));

    g_type_class_add_private (object_class, sizeof (EphyNavigationActionPrivate));
}