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/*
 *  Copyright (C) 2002 Marco Pesenti Gritti
 *
 *  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-gui.h"
#include "eel-gconf-extensions.h"

#include <ctype.h>
#include <string.h>
#include <glib/gi18n.h>
#include <libgnome/gnome-help.h>
#include <gtk/gtktreemodel.h>
#include <gtk/gtkmessagedialog.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkimage.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkstock.h>
#include <gtk/gtkmain.h>
#include <gtk/gtktreeselection.h>

/* Styles for tab labels */
GtkStyle *loading_text_style = NULL;
GtkStyle *new_text_style = NULL;

static void
sanitize_popup_position (GtkWidget *widget, GtkMenu *menu, gint *x, gint *y)
{
    GdkScreen *screen = gtk_widget_get_screen (widget);
    gint monitor_num;
    GdkRectangle monitor;
    GtkRequisition req;

    gtk_widget_size_request (GTK_WIDGET (menu), &req);

    monitor_num = gdk_screen_get_monitor_at_point (screen, *x, *y);
    gtk_menu_set_monitor (menu, monitor_num);
    gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);

    *x = CLAMP (*x, monitor.x, monitor.x + MAX (0, monitor.width - req.width));
    *y = CLAMP (*y, monitor.y, monitor.y + MAX (0, monitor.height - req.height));
}

void
ephy_gui_menu_position_tree_selection (GtkMenu   *menu,
                       gint      *x,
                       gint      *y,
                       gboolean  *push_in,
                       gpointer  user_data)
{
    GtkTreeSelection *selection;
    GList *selected_rows;
    GtkTreeModel *model;
    GtkTreeView *tree_view = GTK_TREE_VIEW (user_data);
    GtkWidget *widget = GTK_WIDGET (user_data);
    GtkRequisition req;

    gtk_widget_size_request (GTK_WIDGET (menu), &req);
    gdk_window_get_origin (widget->window, x, y);

    *x += (widget->allocation.width - req.width) / 2;

    selection = gtk_tree_view_get_selection (tree_view);
    selected_rows = gtk_tree_selection_get_selected_rows (selection, &model);
    if (selected_rows)
    {
        GdkRectangle cell_rect;

        gtk_tree_view_get_cell_area (tree_view, selected_rows->data,
                         NULL, &cell_rect);

        *y += CLAMP (cell_rect.y + cell_rect.height, 0, widget->allocation.height);

        g_list_foreach (selected_rows, (GFunc)gtk_tree_path_free, NULL);
        g_list_free (selected_rows);
    }

    sanitize_popup_position (widget, menu, x, y);
}

/**
 * gul_gui_menu_position_under_widget:
 */
void
ephy_gui_menu_position_under_widget (GtkMenu   *menu,
                     gint      *x,
                     gint      *y,
                     gboolean  *push_in,
                     gpointer   user_data)
{
    GtkWidget *w = GTK_WIDGET (user_data);
    GtkRequisition requisition;
    gboolean rtl;

    rtl = (gtk_widget_get_direction (w) == GTK_TEXT_DIR_RTL);

    gdk_window_get_origin (w->window, x, y);
    gtk_widget_size_request (GTK_WIDGET (menu), &requisition);

    if (rtl)
    {
        *x += w->allocation.x + w->allocation.width - requisition.width;
    }
    else
    {
        *x += w->allocation.x;
    }

    *y += w->allocation.y + w->allocation.height;

    sanitize_popup_position (w, menu, x, y);
}

gboolean
ephy_gui_confirm_overwrite_file (GtkWidget *parent, const char *filename)
{
    GtkWidget *dialog;
    char  *converted;
    gboolean retval;

    if (filename == NULL) return FALSE;

    if (!g_file_test (filename, G_FILE_TEST_EXISTS))
    {
        return TRUE;
    }

    converted = g_filename_to_utf8 (filename, -1, NULL, NULL, NULL);
    if (converted == NULL) return FALSE;

    dialog = gtk_message_dialog_new
        (parent ? GTK_WINDOW (parent) : NULL,
         GTK_DIALOG_MODAL,
         GTK_MESSAGE_WARNING,
         GTK_BUTTONS_CANCEL,
         _("A file %s already exists."), converted);

    gtk_message_dialog_format_secondary_text
        (GTK_MESSAGE_DIALOG (dialog),
         _("If you choose to overwrite this file, "
           "the contents will be lost."));

    gtk_dialog_add_button (GTK_DIALOG (dialog),
                   _("_Overwrite"), GTK_RESPONSE_ACCEPT);

    gtk_window_set_title (GTK_WINDOW (dialog), _("Overwrite File"));
    gtk_window_set_icon_name (GTK_WINDOW (dialog), "web-browser");

    gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_CANCEL);

    retval = (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT);

    gtk_widget_destroy (dialog);

    g_free (converted);

    return retval;
}

void
ephy_gui_help (GtkWindow *parent,
           const char *file_name,
               const char *link_id)
{
    GError *err = NULL;

    gnome_help_display (file_name, link_id, &err);

    if (err != NULL)
    {
        GtkWidget *dialog;
        dialog = gtk_message_dialog_new (parent,
                         GTK_DIALOG_DESTROY_WITH_PARENT,
                         GTK_MESSAGE_ERROR,
                         GTK_BUTTONS_OK,
                         _("Could not display help: %s"), err->message);
        g_signal_connect (G_OBJECT (dialog), "response",
                  G_CALLBACK (gtk_widget_destroy),
                  NULL);
        gtk_dialog_set_has_separator (GTK_DIALOG (dialog), FALSE);
        gtk_widget_show (dialog);
        g_error_free (err);
    }
}

gboolean
ephy_gui_select_row_by_key (GtkTreeView *treeview, gint column, guint32 unicode)
{
    GtkTreeModel *model;
    GtkTreeIter iter, last_iter;
    GtkTreePath *path;
    GValue value = {0, };
    char *string;
    char *event_string;
    gboolean found = FALSE;
    char outbuf[6];
    int length;

    model = gtk_tree_view_get_model (treeview);

    length = g_unichar_to_utf8 (unicode, outbuf);
    event_string = g_utf8_casefold (outbuf, length);

    if (!gtk_tree_model_get_iter_first (model, &iter))
    {
        g_free (event_string);
        return FALSE;
    }

    do
    {
        last_iter = iter;
        gtk_tree_model_get_value (model, &iter, column, &value);

        string = g_utf8_casefold (g_value_get_string (&value), -1);
        g_utf8_strncpy (string, string, 1);
        found = (g_utf8_collate (string, event_string) == 0);

        g_free (string);
        g_value_unset (&value);
    }
    while (!found && gtk_tree_model_iter_next (model, &iter));

    if (!found)
    {
        iter = last_iter;
    }

    path = gtk_tree_model_get_path (model, &iter);
    gtk_tree_view_set_cursor (GTK_TREE_VIEW (treeview), path, NULL, FALSE);
    gtk_tree_path_free (path);
    g_free (event_string);

    return TRUE;
}

gboolean
ephy_gui_is_middle_click (void)
{
    gboolean new_tab = FALSE;
    GdkEvent *event;

    event = gtk_get_current_event ();
    if (event != NULL)
    {
        if (event->type == GDK_BUTTON_RELEASE)
        {
            guint modifiers, button, state;

            modifiers = gtk_accelerator_get_default_mod_mask ();
            button = event->button.button;
            state = event->button.state;

            /* middle-click or control-click */
            if ((button == 1 && ((state & modifiers) == GDK_CONTROL_MASK)) ||
                (button == 2))
            {
                new_tab = TRUE;
            }
        }

        gdk_event_free (event);
    }

    return new_tab;
}