path: root/lib/widgets/ephy-location-entry.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright (C) 2002  Ricardo Fernández Pascual
 *  Copyright (C) 2003  Marco Pesenti Gritti
 *  Copyright (C) 2003  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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-tree-model-node.h"
#include "ephy-location-entry.h"
#include "ephy-marshal.h"
#include "ephy-debug.h"
#include "egg-editable-toolbar.h"

#include <gtk/gtktoolbar.h>
#include <gtk/gtkentry.h>
#include <gtk/gtkwindow.h>
#include <gtk/gtkcellrenderertext.h>
#include <gtk/gtkcelllayout.h>
#include <gtk/gtktreemodelsort.h>
#include <gtk/gtkstock.h>
#include <gtk/gtkimage.h>
#include <gtk/gtkimagemenuitem.h>
#include <gtk/gtkseparatormenuitem.h>
#include <glib/gi18n.h>

#include <string.h>

#define EPHY_LOCATION_ENTRY_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_LOCATION_ENTRY, EphyLocationEntryPrivate))

struct _EphyLocationEntryPrivate
{
    GtkWidget *entry;
    char *before_completion;
    gboolean user_changed;

    guint text_col;
    guint action_col;
    guint keywords_col;
    guint relevance_col;
};

static const struct
{
    const char *prefix;
    int len;
}
web_prefixes [] =
{
    { "http://www.", 11 },
    { "http://", 7 },
    { "https://www.", 12 },
    { "https://", 8 },
    { "www.", 4 }
};

static void ephy_location_entry_class_init (EphyLocationEntryClass *klass);
static void ephy_location_entry_init (EphyLocationEntry *le);

static GObjectClass *parent_class = NULL;

enum EphyLocationEntrySignalsEnum
{
    USER_CHANGED,
    LAST_SIGNAL
};
static gint EphyLocationEntrySignals[LAST_SIGNAL];

enum
{
    LOCATION_HISTORY_NODE_ID = 1
};

enum
{
    EPHY_NODE_LOC_HISTORY_PROP_TEXT = 1
};

#define MAX_LOC_HISTORY_ITEMS 10
#define EPHY_LOC_HISTORY_XML_ROOT "ephy_location_history"
#define EPHY_LOC_HISTORY_XML_VERSION "0.1"

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

    if (G_UNLIKELY (type == 0))
    {
        static const GTypeInfo our_info =
        {
            sizeof (EphyLocationEntryClass),
            NULL,
            NULL,
            (GClassInitFunc) ephy_location_entry_class_init,
            NULL,
            NULL,
            sizeof (EphyLocationEntry),
            0,
            (GInstanceInitFunc) ephy_location_entry_init
        };

        type = g_type_register_static (GTK_TYPE_TOOL_ITEM,
                           "EphyLocationEntry",
                           &our_info, 0);
    }

    return type;
}

static gboolean
ephy_location_entry_set_tooltip (GtkToolItem *tool_item,
                 GtkTooltips *tooltips,
                 const char *tip_text,
                 const char *tip_private)
{
    EphyLocationEntry *entry = EPHY_LOCATION_ENTRY (tool_item);

    g_return_val_if_fail (EPHY_IS_LOCATION_ENTRY (entry), FALSE);

    gtk_tooltips_set_tip (tooltips, entry->priv->entry, tip_text, tip_private);

    return TRUE;
}

static void
ephy_location_entry_class_init (EphyLocationEntryClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    GtkToolItemClass *tool_item_class = GTK_TOOL_ITEM_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    tool_item_class->set_tooltip = ephy_location_entry_set_tooltip;

    EphyLocationEntrySignals[USER_CHANGED] = g_signal_new (
        "user_changed", G_OBJECT_CLASS_TYPE (klass),
        G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST | G_SIGNAL_RUN_CLEANUP,
                G_STRUCT_OFFSET (EphyLocationEntryClass, user_changed),
        NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE,
        0,
        G_TYPE_NONE);

    g_type_class_add_private (object_class, sizeof (EphyLocationEntryPrivate));
}

static void
editable_changed_cb (GtkEditable *editable, EphyLocationEntry *e)
{
    EphyLocationEntryPrivate *p = e->priv;

    if (p->user_changed)
    {
        g_signal_emit (e, EphyLocationEntrySignals[USER_CHANGED], 0);
    }
}

static gboolean
entry_button_press_cb (GtkWidget *entry, GdkEventButton *event, EphyLocationEntry *le)
{
    if (event->button == 1 && event->type == GDK_2BUTTON_PRESS)
    {
        ephy_location_entry_activate (le);
        return TRUE;
    }

    return FALSE;
}

static gboolean
keyword_match (const char *list,
           const char *keyword)
{
    const char *p;
    gsize keyword_len;

    p = list;
    keyword_len = strlen (keyword);

    while (*p)
    {
        int i;

        for (i = 0; i < keyword_len; i++)
        {
            if (p[i] != keyword[i])
            {
                goto next_token;
            }
        }
      
        return TRUE;
      
        next_token:

        while (*p && *p != ' ') p++;
        if (*p) p++;
    }

    return FALSE;
}

static gboolean
completion_func (GtkEntryCompletion *completion,
                 const char *key,
         GtkTreeIter *iter,
         gpointer data)
{
    int i, len_key, len_prefix;
    char *item = NULL;
    char *keywords = NULL;
    gboolean ret = FALSE;
    EphyLocationEntry *le = EPHY_LOCATION_ENTRY (data);
    GtkTreeModel *model;

    model = gtk_entry_completion_get_model (completion);

    gtk_tree_model_get (model, iter,
                le->priv->text_col, &item,
                le->priv->keywords_col, &keywords,
                -1);

    len_key = strlen (key);
    if (!strncmp (key, item, len_key))
    {
        ret = TRUE;
    }
    else if (keyword_match (keywords, key))
    {
        ret = TRUE;
    }
    else
    {
        for (i = 0; i < G_N_ELEMENTS (web_prefixes); i++)
        {
            len_prefix = web_prefixes[i].len;
            if (!strncmp (web_prefixes[i].prefix, item, len_prefix) &&
                !strncmp (key, item + len_prefix, len_key))
            {
                ret = TRUE;
                break;
            }
        }
    }

    g_free (item);
    g_free (keywords);

    return ret;
}

static gboolean
match_selected_cb (GtkEntryCompletion *completion,
           GtkTreeModel *model,
           GtkTreeIter *iter,
           EphyLocationEntry *le)
{
    char *item = NULL;

    gtk_tree_model_get (model, iter,
                le->priv->action_col, &item, -1);

    ephy_location_entry_set_location (le, item);
    g_signal_emit_by_name (le->priv->entry, "activate");

    g_free (item);

    return TRUE;
}

static gboolean
toolbar_is_editable (GtkWidget *widget)
{
    GtkWidget *etoolbar;

    etoolbar = gtk_widget_get_ancestor (widget, EGG_TYPE_EDITABLE_TOOLBAR);

    if (etoolbar)
    {
        return egg_editable_toolbar_get_edit_mode
            (EGG_EDITABLE_TOOLBAR (etoolbar));
    }

    return FALSE;
}

static gboolean
entry_drag_motion_cb (GtkWidget        *widget,
              GdkDragContext   *context,
              gint              x,
              gint              y,
              guint             time)
{
    if (toolbar_is_editable (widget))
    {
        g_signal_stop_emission_by_name (widget, "drag_motion");
    }
    
    return FALSE;
}

static gboolean
entry_drag_drop_cb (GtkWidget          *widget,
            GdkDragContext     *context,
            gint                x,
            gint                y,
            guint               time)
{
    if (toolbar_is_editable (widget))
    {
        g_signal_stop_emission_by_name (widget, "drag_drop");
    }

    return FALSE;
}

static void
entry_clear_activate_cb (GtkMenuItem *item,
             EphyLocationEntry *entry)
{
    EphyLocationEntryPrivate *priv = entry->priv;

    priv->user_changed = FALSE;
    gtk_entry_set_text (GTK_ENTRY (priv->entry), "");
    priv->user_changed = TRUE;
}

static void
entry_populate_popup_cb (GtkEntry *entry,
             GtkMenu *menu,
             EphyLocationEntry *lentry)
{
    GtkWidget *image;
    GtkWidget *menuitem;
    GList *children, *item;
    int pos = 0, sep = 0;

    /* Clear and Copy mnemonics conflict, make custom menuitem */
    image = gtk_image_new_from_stock (GTK_STOCK_CLEAR, GTK_ICON_SIZE_MENU);
    gtk_widget_show (image);

    /* Translators: the mnemonic shouldn't conflict with any of the
     * standard items in the GtkEntry context menu (Cut, Copy, Paste, Delete,
     * Select All, Input Methods and Insert Unicode control character.)
     */
    menuitem = gtk_image_menu_item_new_with_mnemonic (_("Cl_ear"));
    gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM(menuitem), image);
    g_signal_connect (menuitem , "activate",
              G_CALLBACK (entry_clear_activate_cb), lentry);
    gtk_widget_show (menuitem);

    /* search for the 2nd separator (the one after Select All) in the context
     * menu, and insert this menu item before it.
     * It's a bit of a hack, but there seems to be no better way to do it :/
     */
    children = GTK_MENU_SHELL (menu)->children;
    for (item = children; item != NULL && sep < 2; item = item->next, pos++)
    {
        if (GTK_IS_SEPARATOR_MENU_ITEM (item->data)) sep++;
    }

    gtk_menu_shell_insert (GTK_MENU_SHELL (menu), menuitem, pos - 1);
}

static void
ephy_location_entry_construct_contents (EphyLocationEntry *le)
{
    EphyLocationEntryPrivate *p = le->priv;

    LOG ("EphyLocationEntry constructing contents %p", le)

    p->entry = gtk_entry_new ();
    
    gtk_container_add (GTK_CONTAINER (le), p->entry);
    gtk_widget_show (p->entry);

    g_signal_connect (p->entry, "populate_popup",
              G_CALLBACK (entry_populate_popup_cb), le);
    g_signal_connect (p->entry, "button_press_event",
              G_CALLBACK (entry_button_press_cb), le);
    g_signal_connect (p->entry, "changed",
              G_CALLBACK (editable_changed_cb), le);
    g_signal_connect (p->entry, "drag_motion",
              G_CALLBACK (entry_drag_motion_cb), le);
    g_signal_connect (p->entry, "drag_drop",
              G_CALLBACK (entry_drag_drop_cb), le);
}

static void
ephy_location_entry_init (EphyLocationEntry *le)
{
    EphyLocationEntryPrivate *p;

    LOG ("EphyLocationEntry initialising %p", le)

    p = EPHY_LOCATION_ENTRY_GET_PRIVATE (le);
    le->priv = p;

    p->user_changed = TRUE;

    ephy_location_entry_construct_contents (le);

    gtk_tool_item_set_expand (GTK_TOOL_ITEM (le), TRUE);
}

GtkWidget *
ephy_location_entry_new (void)
{
    return GTK_WIDGET (g_object_new (EPHY_TYPE_LOCATION_ENTRY, NULL));
}

static gint
sort_func (GtkTreeModel *model,
       GtkTreeIter *a,
       GtkTreeIter *b,
       gpointer data)
{
    gint valuea, valueb;
    EphyLocationEntry *le = EPHY_LOCATION_ENTRY (data);

    gtk_tree_model_get (model, a,
                le->priv->relevance_col, &valuea, -1);
    gtk_tree_model_get (model, b,
                le->priv->relevance_col, &valueb, -1);

    return valueb - valuea;
}

void
ephy_location_entry_set_completion (EphyLocationEntry *le,
                    GtkTreeModel *model,
                    guint text_col,
                    guint action_col,
                    guint keywords_col,
                    guint relevance_col)
{
    GtkTreeModel *sort_model;
    GtkEntryCompletion *completion;
    GtkCellRenderer *cell;

    le->priv->text_col = text_col;
    le->priv->action_col = action_col;
    le->priv->keywords_col = keywords_col;
    le->priv->relevance_col = relevance_col;

    sort_model = gtk_tree_model_sort_new_with_model (model);
    g_object_unref (model);
    gtk_tree_sortable_set_default_sort_func
        (GTK_TREE_SORTABLE (sort_model),
         sort_func, le, NULL);

    completion = gtk_entry_completion_new ();
    gtk_entry_completion_set_model (completion, sort_model);
    g_object_unref (sort_model);
    gtk_entry_completion_set_match_func (completion, completion_func, le, NULL);
    g_signal_connect (completion, "match_selected",
              G_CALLBACK (match_selected_cb), le);

    cell = gtk_cell_renderer_text_new ();
    gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (completion),
                    cell, TRUE);
    gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (completion),
                       cell, "text", text_col);

    gtk_entry_set_completion (GTK_ENTRY (le->priv->entry), completion);
    g_object_unref (completion);
}

void
ephy_location_entry_set_location (EphyLocationEntry *le,
                  const gchar *new_location)
{
    EphyLocationEntryPrivate *p = le->priv;

    g_return_if_fail (new_location != NULL);

    p->user_changed = FALSE;

    gtk_entry_set_text (GTK_ENTRY (p->entry), new_location);

    p->user_changed = TRUE;
}

const char *
ephy_location_entry_get_location (EphyLocationEntry *le)
{
    return gtk_entry_get_text (GTK_ENTRY (le->priv->entry));
}

void
ephy_location_entry_activate (EphyLocationEntry *le)
{
    GtkWidget *toplevel;

    toplevel = gtk_widget_get_toplevel (le->priv->entry);

    gtk_editable_select_region (GTK_EDITABLE(le->priv->entry),
                    0, -1);
        gtk_window_set_focus (GTK_WINDOW(toplevel),
                              le->priv->entry);
}