/*
* Virt Viewer: A virtual machine console viewer
*
* Copyright (C) 2018 Red Hat, Inc.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Marc-André Lureau <marcandre.lureau@redhat.com>
*/
#include <config.h>
#include <glib/gi18n.h>
#ifdef HAVE_VTE
#include <vte/vte.h>
#endif
#include "virt-viewer-auth.h"
#include "virt-viewer-display-vte.h"
#include "virt-viewer-util.h"
struct _VirtViewerDisplayVte {
VirtViewerDisplay parent;
#ifdef HAVE_VTE
VteTerminal *vte;
#endif
GtkWidget *scroll;
gchar *name;
};
G_DEFINE_TYPE(VirtViewerDisplayVte, virt_viewer_display_vte, VIRT_VIEWER_TYPE_DISPLAY)
enum {
PROP_0,
PROP_NAME,
};
static void
virt_viewer_display_vte_finalize(GObject *obj)
{
G_OBJECT_CLASS(virt_viewer_display_vte_parent_class)->finalize(obj);
}
static void
virt_viewer_display_vte_set_property(GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
VirtViewerDisplayVte *self = VIRT_VIEWER_DISPLAY_VTE(object);
switch (prop_id) {
case PROP_NAME:
g_free(self->name);
self->name = g_value_dup_string(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
virt_viewer_display_vte_get_property(GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
VirtViewerDisplayVte *self = VIRT_VIEWER_DISPLAY_VTE(object);
switch (prop_id) {
case PROP_NAME:
g_value_set_string(value, self->name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
virt_viewer_display_vte_size_allocate(GtkWidget *widget G_GNUC_UNUSED,
GtkAllocation *allocation G_GNUC_UNUSED)
{
GtkWidget *child = gtk_bin_get_child(GTK_BIN(widget));
if (child && gtk_widget_get_visible(child))
gtk_widget_size_allocate(child, allocation);
}
static void
virt_viewer_display_vte_class_init(VirtViewerDisplayVteClass *klass)
{
GObjectClass *oclass = G_OBJECT_CLASS(klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
oclass->set_property = virt_viewer_display_vte_set_property;
oclass->get_property = virt_viewer_display_vte_get_property;
oclass->finalize = virt_viewer_display_vte_finalize;
/* override display desktop aspect-ratio behaviour */
widget_class->size_allocate = virt_viewer_display_vte_size_allocate;
g_object_class_install_property(oclass,
PROP_NAME,
g_param_spec_string("name",
"Name",
"Console name",
NULL,
G_PARAM_READWRITE|
G_PARAM_CONSTRUCT_ONLY|
G_PARAM_STATIC_STRINGS));
g_signal_new("commit",
G_OBJECT_CLASS_TYPE(oclass),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL,
NULL,
G_TYPE_NONE,
2,
G_TYPE_POINTER, G_TYPE_INT);
}
static void
virt_viewer_display_vte_init(VirtViewerDisplayVte *self G_GNUC_UNUSED)
{
}
#ifdef HAVE_VTE
static void
virt_viewer_display_vte_commit(VirtViewerDisplayVte *self,
const gchar *text,
guint size,
gpointer user_data G_GNUC_UNUSED)
{
g_signal_emit_by_name(self, "commit", text, size);
}
static void
virt_viewer_display_vte_adj_changed(VirtViewerDisplayVte *self,
GtkAdjustment *adjustment)
{
gtk_widget_set_visible(self->scroll,
gtk_adjustment_get_upper(adjustment) > gtk_adjustment_get_page_size(adjustment));
}
#endif
GtkWidget *
virt_viewer_display_vte_new(VirtViewerSession *session, const char *name)
{
VirtViewerDisplayVte *self;
GtkWidget *grid, *vte;
#ifdef HAVE_VTE
GtkWidget *scroll = NULL;
#endif
self = g_object_new(VIRT_VIEWER_TYPE_DISPLAY_VTE,
"session", session,
"nth-display", -1,
"name", name,
NULL);
#ifdef HAVE_VTE
vte = vte_terminal_new();
self->vte = VTE_TERMINAL(g_object_ref(vte));
virt_viewer_signal_connect_object(vte, "commit",
G_CALLBACK(virt_viewer_display_vte_commit),
self, G_CONNECT_SWAPPED);
scroll = gtk_scrollbar_new(GTK_ORIENTATION_VERTICAL,
gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(vte)));
self->scroll = scroll;
#else
vte = gtk_label_new(_("Console support is compiled out!"));
#endif
g_object_set(vte, "hexpand", TRUE, "vexpand", TRUE, NULL);
grid = gtk_grid_new();
gtk_container_add(GTK_CONTAINER(grid), vte);
#ifdef HAVE_VTE
if (scroll) {
gtk_container_add(GTK_CONTAINER(grid), scroll);
gtk_widget_hide(scroll);
virt_viewer_signal_connect_object(gtk_range_get_adjustment(GTK_RANGE(scroll)),
"changed", G_CALLBACK(virt_viewer_display_vte_adj_changed),
self, G_CONNECT_SWAPPED);
}
#endif
gtk_container_add(GTK_CONTAINER(self), grid);
return GTK_WIDGET(self);
}
/* adapted from gnome-terminal */
/* Allow scales a bit smaller and a bit larger than the usual pango ranges */
#define TERMINAL_SCALE_XXX_SMALL (PANGO_SCALE_XX_SMALL/1.2)
#define TERMINAL_SCALE_XXXX_SMALL (TERMINAL_SCALE_XXX_SMALL/1.2)
#define TERMINAL_SCALE_XXXXX_SMALL (TERMINAL_SCALE_XXXX_SMALL/1.2)
#define TERMINAL_SCALE_XXX_LARGE (PANGO_SCALE_XX_LARGE*1.2)
#define TERMINAL_SCALE_XXXX_LARGE (TERMINAL_SCALE_XXX_LARGE*1.2)
#define TERMINAL_SCALE_XXXXX_LARGE (TERMINAL_SCALE_XXXX_LARGE*1.2)
#define TERMINAL_SCALE_MINIMUM (TERMINAL_SCALE_XXXXX_SMALL/1.2)
#define TERMINAL_SCALE_MAXIMUM (TERMINAL_SCALE_XXXXX_LARGE*1.2)
#ifdef HAVE_VTE
static const double zoom_factors[] = {
TERMINAL_SCALE_MINIMUM,
TERMINAL_SCALE_XXXXX_SMALL,
TERMINAL_SCALE_XXXX_SMALL,
TERMINAL_SCALE_XXX_SMALL,
PANGO_SCALE_XX_SMALL,
PANGO_SCALE_X_SMALL,
PANGO_SCALE_SMALL,
PANGO_SCALE_MEDIUM,
PANGO_SCALE_LARGE,
PANGO_SCALE_X_LARGE,
PANGO_SCALE_XX_LARGE,
TERMINAL_SCALE_XXX_LARGE,
TERMINAL_SCALE_XXXX_LARGE,
TERMINAL_SCALE_XXXXX_LARGE,
TERMINAL_SCALE_MAXIMUM
};
static gboolean
find_larger_zoom_factor (double *zoom)
{
double current = *zoom;
guint i;
for (i = 0; i < G_N_ELEMENTS (zoom_factors); ++i)
{
/* Find a font that's larger than this one */
if ((zoom_factors[i] - current) > 1e-6)
{
*zoom = zoom_factors[i];
return TRUE;
}
}
return FALSE;
}
static gboolean
find_smaller_zoom_factor (double *zoom)
{
double current = *zoom;
int i;
i = (int) G_N_ELEMENTS (zoom_factors) - 1;
while (i >= 0)
{
/* Find a font that's smaller than this one */
if ((current - zoom_factors[i]) > 1e-6)
{
*zoom = zoom_factors[i];
return TRUE;
}
--i;
}
return FALSE;
}
void virt_viewer_display_vte_feed(VirtViewerDisplayVte *display, gpointer data, int size)
{
vte_terminal_feed(display->vte, data, size);
}
void virt_viewer_display_vte_zoom_in(VirtViewerDisplayVte *self)
{
double zoom = vte_terminal_get_font_scale(self->vte);
if (!find_larger_zoom_factor(&zoom))
return;
vte_terminal_set_font_scale(self->vte, zoom);
}
void virt_viewer_display_vte_zoom_out(VirtViewerDisplayVte *self)
{
double zoom = vte_terminal_get_font_scale(self->vte);
if (!find_smaller_zoom_factor(&zoom))
return;
vte_terminal_set_font_scale(self->vte, zoom);
}
void virt_viewer_display_vte_zoom_reset(VirtViewerDisplayVte *self)
{
vte_terminal_set_font_scale(self->vte, PANGO_SCALE_MEDIUM);
}
#else
void virt_viewer_display_vte_feed(VirtViewerDisplayVte *self G_GNUC_UNUSED,
gpointer data G_GNUC_UNUSED, int size G_GNUC_UNUSED)
{
}
void virt_viewer_display_vte_zoom_in(VirtViewerDisplayVte *self G_GNUC_UNUSED)
{
}
void virt_viewer_display_vte_zoom_out(VirtViewerDisplayVte *self G_GNUC_UNUSED)
{
}
void virt_viewer_display_vte_zoom_reset(VirtViewerDisplayVte *self G_GNUC_UNUSED)
{
}
#endif