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/*
* Remmina - The GTK+ Remote Desktop Client
* Copyright (C) 2009 - Vic Lee
* Copyright (C) 2014-2015 Antenore Gatta, Fabio Castelli, Giovanni Panozzo
* Copyright (C) 2016-2023 Antenore Gatta, Giovanni Panozzo
*
* 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 of the License, 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.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. * If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. * If you
* do not wish to do so, delete this exception statement from your
* version. * If you delete this exception statement from all source
* files in the program, then also delete it here.
*
*/
#include <gtk/gtk.h>
#include "config.h"
#include "remmina_scrolled_viewport.h"
#include "remmina_pref.h"
#include "remmina_log.h"
#include "remmina/remmina_trace_calls.h"
G_DEFINE_TYPE( RemminaScrolledViewport, remmina_scrolled_viewport, GTK_TYPE_EVENT_BOX)
static void remmina_scrolled_viewport_get_preferred_width(GtkWidget* widget, gint* minimum_width, gint* natural_width)
{
TRACE_CALL(__func__);
/* Just return a fake small size, so gtk_window_fullscreen() will not fail
* because our content is too big*/
if (minimum_width != NULL) *minimum_width = 100;
if (natural_width != NULL) *natural_width = 100;
}
static void remmina_scrolled_viewport_get_preferred_height(GtkWidget* widget, gint* minimum_height, gint* natural_height)
{
TRACE_CALL(__func__);
/* Just return a fake small size, so gtk_window_fullscreen() will not fail
* because our content is too big*/
if (minimum_height != NULL) *minimum_height = 100;
if (natural_height != NULL) *natural_height = 100;
}
/* Event handler when mouse move on borders
* Note that this handler may repeat itself. Zeroing out viewport_motion_handler before returning FALSE will
* relay the fact that this specific occurrence of timeout has been cancelled.
* A new one may be scheduled if the mouse pointer moves to the edge again.
*/
static gboolean remmina_scrolled_viewport_motion_timeout(gpointer data)
{
TRACE_CALL(__func__);
RemminaScrolledViewport *gsv;
GtkWidget *child;
GdkDisplay *display;
#if GTK_CHECK_VERSION(3, 20, 0)
GdkSeat *seat;
#else
GdkDeviceManager *device_manager;
#endif
GdkDevice *pointer;
GdkScreen *screen;
GdkWindow *gsvwin;
gint x, y, mx, my, w, h, rootx, rooty;
GtkAdjustment *adj;
gdouble value;
gsv = REMMINA_SCROLLED_VIEWPORT(data);
if (!gsv || !gsv->viewport_motion_handler)
// Either the pointer is nullptr or the source id is already 0
return FALSE;
if (!REMMINA_IS_SCROLLED_VIEWPORT(data)) {
gsv->viewport_motion_handler = 0;
return FALSE;
}
if (!GTK_IS_BIN(data)) {
gsv->viewport_motion_handler = 0;
return FALSE;
}
child = gtk_bin_get_child(GTK_BIN(gsv));
if (!GTK_IS_VIEWPORT(child)) {
gsv->viewport_motion_handler = 0;
return FALSE;
}
gsvwin = gtk_widget_get_window(GTK_WIDGET(gsv));
display = gdk_display_get_default();
if (!display) {
gsv->viewport_motion_handler = 0;
return FALSE;
}
#if GTK_CHECK_VERSION(3, 20, 0)
seat = gdk_display_get_default_seat(display);
pointer = gdk_seat_get_pointer(seat);
#else
device_manager = gdk_display_get_device_manager(display);
pointer = gdk_device_manager_get_client_pointer(device_manager);
#endif
gdk_device_get_position(pointer, &screen, &x, &y);
w = gdk_window_get_width(gsvwin) + SCROLL_BORDER_SIZE; // Add 2px of black scroll border
h = gdk_window_get_height(gsvwin) + SCROLL_BORDER_SIZE; // Add 2px of black scroll border
gdk_window_get_root_origin(gsvwin, &rootx, &rooty );
x -= rootx;
y -= rooty;
mx = (x <= 0 ? -1 : (x >= w - 1 ? 1 : 0));
my = (y <= 0 ? -1 : (y >= h - 1 ? 1 : 0));
if (mx != 0) {
gint step = MAX(10, MIN(remmina_pref.auto_scroll_step, w / 5));
adj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(child));
value = gtk_adjustment_get_value(GTK_ADJUSTMENT(adj)) + (gdouble)(mx * step);
value = MAX(0, MIN(value, gtk_adjustment_get_upper(GTK_ADJUSTMENT(adj)) - (gdouble)w + 2.0));
gtk_adjustment_set_value(GTK_ADJUSTMENT(adj), value);
}
if (my != 0) {
gint step = MAX(10, MIN(remmina_pref.auto_scroll_step, h / 5));
adj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(child));
value = gtk_adjustment_get_value(GTK_ADJUSTMENT(adj)) + (gdouble)(my * step);
value = MAX(0, MIN(value, gtk_adjustment_get_upper(GTK_ADJUSTMENT(adj)) - (gdouble)h + 2.0));
gtk_adjustment_set_value(GTK_ADJUSTMENT(adj), value);
}
return TRUE;
}
static gboolean remmina_scrolled_viewport_enter(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
{
TRACE_CALL(__func__);
remmina_scrolled_viewport_remove_motion(REMMINA_SCROLLED_VIEWPORT(widget));
return FALSE;
}
static gboolean remmina_scrolled_viewport_leave(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
{
TRACE_CALL(__func__);
RemminaScrolledViewport *gsv = REMMINA_SCROLLED_VIEWPORT(widget);
if (gsv->viewport_motion_handler) {
REMMINA_DEBUG("cleaning motion ...");
remmina_scrolled_viewport_remove_motion(gsv);
}
gsv->viewport_motion_handler = g_timeout_add(20, remmina_scrolled_viewport_motion_timeout, gsv);
return FALSE;
}
static void remmina_scrolled_viewport_destroy(GtkWidget *widget, gpointer data)
{
TRACE_CALL(__func__);
remmina_scrolled_viewport_remove_motion(REMMINA_SCROLLED_VIEWPORT(widget));
}
static void remmina_scrolled_viewport_class_init(RemminaScrolledViewportClass *klass)
{
TRACE_CALL(__func__);
GtkWidgetClass *widget_class;
widget_class = (GtkWidgetClass*)klass;
widget_class->get_preferred_width = remmina_scrolled_viewport_get_preferred_width;
widget_class->get_preferred_height = remmina_scrolled_viewport_get_preferred_height;
}
static void remmina_scrolled_viewport_init(RemminaScrolledViewport *gsv)
{
TRACE_CALL(__func__);
}
void remmina_scrolled_viewport_remove_motion(RemminaScrolledViewport *gsv)
{
TRACE_CALL(__func__);
guint handler = gsv->viewport_motion_handler;
if (handler) {
gsv->viewport_motion_handler = 0;
g_source_remove(handler);
}
}
GtkWidget*
remmina_scrolled_viewport_new(void)
{
TRACE_CALL(__func__);
RemminaScrolledViewport *gsv;
gsv = REMMINA_SCROLLED_VIEWPORT(g_object_new(REMMINA_TYPE_SCROLLED_VIEWPORT, NULL));
gsv->viewport_motion_handler = 0;
gtk_widget_set_size_request(GTK_WIDGET(gsv), 1, 1);
gtk_widget_add_events(GTK_WIDGET(gsv), GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK);
g_signal_connect(G_OBJECT(gsv), "destroy", G_CALLBACK(remmina_scrolled_viewport_destroy), NULL);
g_signal_connect(G_OBJECT(gsv), "enter-notify-event", G_CALLBACK(remmina_scrolled_viewport_enter), NULL);
g_signal_connect(G_OBJECT(gsv), "leave-notify-event", G_CALLBACK(remmina_scrolled_viewport_leave), NULL);
return GTK_WIDGET(gsv);
}
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