path: root/lib/ephy-gui.c

/*
 *  Copyright © 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

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

#include "ephy-debug.h"

#include <ctype.h>
#include <gdk/gdkx.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include <string.h>
#include <unistd.h>

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

    g_return_if_fail (widget != NULL);

    gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL);

    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;
    GtkAllocation allocation;
    GdkRectangle visible;

    gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL);
    gdk_window_get_origin (gtk_widget_get_window (widget), x, y);
    gtk_widget_get_allocation (widget, &allocation);

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

    /* Add on height for the treeview title */
    gtk_tree_view_get_visible_rect (tree_view, &visible);
    *y += allocation.height - visible.height;

    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, visible.height);

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

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

/**
 * ephy_gui_menu_position_under_widget:
 * @menu:
 * @x:
 * @y:
 * @push_in:
 * @user_data: a #GtkWidget
 * 
 * Positions @menu under (or over, depending on space available) the widget
 * @user_data.
 */
void
ephy_gui_menu_position_under_widget (GtkMenu   *menu,
                     gint      *x,
                     gint      *y,
                     gboolean  *push_in,
                     gpointer   user_data)
{
    /* Adapted from gtktoolbar.c */
    GtkWidget *widget = GTK_WIDGET (user_data);
    GtkWidget *container;
    GtkRequisition req;
    GtkRequisition menu_req;
    GtkAllocation allocation;
    GdkRectangle monitor;
    GdkWindow *window;
    int monitor_num;
    GdkScreen *screen;
  
    g_return_if_fail (GTK_IS_WIDGET (widget));

    container = gtk_widget_get_ancestor (widget, GTK_TYPE_CONTAINER);
    g_return_if_fail (container != NULL);

    gtk_widget_get_preferred_size (widget, &req, NULL);
    gtk_widget_get_preferred_size (GTK_WIDGET (menu), &menu_req, NULL);

    screen = gtk_widget_get_screen (GTK_WIDGET (menu));
    window = gtk_widget_get_window (widget);
    monitor_num = gdk_screen_get_monitor_at_window (screen, window);
    if (monitor_num < 0)
        monitor_num = 0;
    gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);

    gtk_widget_get_allocation (widget, &allocation);
    gdk_window_get_origin (window, x, y);
    if (!gtk_widget_get_has_window (widget))
    {
        *x += allocation.x;
        *y += allocation.y;
    }

    if (gtk_widget_get_direction (container) == GTK_TEXT_DIR_LTR) 
        *x += allocation.width - req.width;
    else 
        *x += req.width - menu_req.width;

    if ((*y + allocation.height + menu_req.height) <= monitor.y + monitor.height)
        *y += allocation.height;
    else if ((*y - menu_req.height) >= monitor.y)
        *y -= menu_req.height;
    else if (monitor.y + monitor.height - (*y + allocation.height) > *y)
        *y += allocation.height;
    else
        *y -= menu_req.height;

    *push_in = FALSE;
}

GtkWindowGroup *
ephy_gui_ensure_window_group (GtkWindow *window)
{
    GtkWindowGroup *group;

    group = gtk_window_get_group (window);
    if (group == NULL)
    {
        group = gtk_window_group_new ();
        gtk_window_group_add_window (group, window);
        g_object_unref (group);
    }

    return group;
}

gboolean
ephy_gui_check_location_writable (GtkWidget *parent,
                  const char *filename)
{
    GtkWidget *dialog;
    char *display_name;

    if (filename == NULL) return FALSE;

    if (!g_file_test (filename, G_FILE_TEST_EXISTS))
    {
        char *path = g_path_get_dirname (filename);
        gboolean writable = access (path, W_OK) == 0;

        /* check if path is writable to */
        if (!writable)
        {
            dialog = gtk_message_dialog_new (
                    parent ? GTK_WINDOW(parent) : NULL,
                    GTK_DIALOG_DESTROY_WITH_PARENT,
                    GTK_MESSAGE_ERROR,
                    GTK_BUTTONS_CLOSE,
                    _("Directory “%s” is not writable"), path);

            gtk_message_dialog_format_secondary_text (
                    GTK_MESSAGE_DIALOG (dialog),
                    _("You do not have permission to "
                      "create files in this directory."));

            gtk_window_set_title (GTK_WINDOW (dialog), _("Directory not Writable"));

            if (parent != NULL)
            {
                gtk_window_group_add_window (
                        ephy_gui_ensure_window_group (GTK_WINDOW (parent)),
                        GTK_WINDOW (dialog));
            }

            gtk_dialog_run (GTK_DIALOG (dialog));

            gtk_widget_destroy (dialog);        
        }

        g_free (path);

        return writable;
    }

    display_name = g_filename_display_basename (filename);

    /* check if file is writable */
    if (access (filename, W_OK) != 0)
    {
        dialog = gtk_message_dialog_new (
                parent ? GTK_WINDOW(parent) : NULL,
                GTK_DIALOG_DESTROY_WITH_PARENT,
                GTK_MESSAGE_ERROR,
                GTK_BUTTONS_CLOSE,
                _("Cannot overwrite existing file “%s”"), display_name);

        gtk_message_dialog_format_secondary_text (
                GTK_MESSAGE_DIALOG (dialog),
                _("A file with this name already exists and "
                  "you don't have permission to overwrite it."));

        gtk_window_set_title (GTK_WINDOW (dialog), _("Cannot Overwrite File"));

        if (parent != NULL)
        {
            gtk_window_group_add_window (
                    ephy_gui_ensure_window_group (GTK_WINDOW (parent)),
                    GTK_WINDOW (dialog));
        }

        gtk_dialog_run (GTK_DIALOG (dialog));

        gtk_widget_destroy (dialog);        

        return FALSE;
    }


    return TRUE;
}

/**
 * ephy_gui_help:
 * @parent: the parent window where help is being called
 * @section: help section to open or %NULL
 *
 * Displays Epiphany's help, opening the section indicated by @section.
 *
 * Note that @parent is used to know the #GdkScreen where to open the help
 * window.
 **/
void
ephy_gui_help (GtkWidget *parent,
           const char *section)
{
    GError *error = NULL;
    GdkScreen *screen;
    char *url;

    if (section)
        url = g_strdup_printf ("ghelp:epiphany?%s", section);
    else
        url = g_strdup ("ghelp:epiphany");

    if (parent)
        screen = gtk_widget_get_screen (parent);
    else
        screen = gdk_screen_get_default ();

    gtk_show_uri (screen, url, gtk_get_current_event_time (), &error);

    if (error != NULL)
    {
        GtkWidget *dialog;

        dialog = gtk_message_dialog_new (GTK_WINDOW (parent),
                         GTK_DIALOG_DESTROY_WITH_PARENT,
                         GTK_MESSAGE_ERROR,
                         GTK_BUTTONS_OK,
                         _("Could not display help: %s"),
                         error->message);
        g_error_free (error);

        g_signal_connect (dialog, "response",
                  G_CALLBACK (gtk_widget_destroy), NULL);
        gtk_widget_show (dialog);
    }

    g_free (url);
}

void
ephy_gui_get_current_event (GdkEventType *otype,
                guint *ostate,
                guint *obutton)
{
    GdkEvent *event;
    GdkEventType type = GDK_NOTHING;
    guint state = 0, button = (guint) -1;

    event = gtk_get_current_event ();
    if (event != NULL)
    {
        type = event->type;

        if (type == GDK_KEY_PRESS ||
            type == GDK_KEY_RELEASE)
        {
            state = event->key.state;
        }
        else if (type == GDK_BUTTON_PRESS ||
             type == GDK_BUTTON_RELEASE ||
             type == GDK_2BUTTON_PRESS ||
             type == GDK_3BUTTON_PRESS)
        {
            button = event->button.button;
            state = event->button.state;
        }

        gdk_event_free (event);
    }
    
    if (otype) *otype = type;
    if (ostate) *ostate = state & gtk_accelerator_get_default_mod_mask ();
    if (obutton) *obutton = button;
}

gboolean
ephy_gui_is_middle_click (void)
{
    gboolean is_middle_click = 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 && ((state & modifiers) == 0)))
            {
                is_middle_click = TRUE;
            }
        }

        gdk_event_free (event);
    }

    return is_middle_click;
}

void
ephy_gui_window_update_user_time (GtkWidget *window,
                  guint32 user_time)
{
    LOG ("updating user time on window %p to %d", window, user_time);

    if (user_time != 0)
    {
        gtk_widget_realize (window);
        gdk_x11_window_set_user_time (gtk_widget_get_window (window),
                          user_time);
    }

}