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#include <string.h>
#include "greeter_canvas_text.h"
#include <libgnomecanvas/gnome-canvas.h>
#include <libgnomecanvas/gnome-canvas-text.h>
#include <pango/pangoft2.h>
enum
{
PROP_0,
PROP_TEXT,
PROP_MARKUP
};
static void greeter_canvas_text_class_init (GreeterCanvasTextClass *class);
static void greeter_canvas_text_init (GreeterCanvasText *text);
static void greeter_canvas_text_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void greeter_canvas_text_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
G_DEFINE_TYPE (GreeterCanvasText, greeter_canvas_text, GNOME_TYPE_CANVAS_TEXT)
static void
greeter_canvas_text_class_init (GreeterCanvasTextClass *greeter_class)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (greeter_class);
gobject_class->set_property = greeter_canvas_text_set_property;
gobject_class->get_property = greeter_canvas_text_get_property;
g_object_class_install_property
(gobject_class,
PROP_TEXT,
g_param_spec_string ("text",
"Text",
"Text to render",
NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
g_object_class_install_property
(gobject_class,
PROP_MARKUP,
g_param_spec_string ("markup",
"Markup",
"Markup to render",
NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
}
static void
greeter_canvas_text_init (GreeterCanvasText *text)
{
}
static gdouble
greeter_canvas_text_get_screen_dpi (GreeterCanvasText *text)
{
GdkDisplay *display;
GdkScreen *screen;
GdkAtom atom, type;
gint resources_length;
gchar *resources, *resource, *end;
gdouble dpi;
static const gdouble default_dpi = 96.0;
atom = gdk_atom_intern ("RESOURCE_MANAGER", TRUE);
if (atom == 0)
return default_dpi;
display =
gtk_widget_get_display (GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas));
if (display == NULL)
return default_dpi;
screen =
gtk_widget_get_screen (GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas));
if (screen == NULL)
return default_dpi;
gdk_error_trap_push ();
if (!gdk_property_get (gdk_screen_get_root_window (screen),
atom, GDK_TARGET_STRING,
0, G_MAXINT,
FALSE,
&type, NULL, &resources_length,
(void *) &resources))
{
gdk_error_trap_pop ();
return default_dpi;
}
gdk_display_sync (display);
gdk_error_trap_pop ();
if (type != GDK_TARGET_STRING)
return default_dpi;
if (resources == NULL)
return default_dpi;
resource = strstr (resources, "Xft.dpi:\t");
if (resource == NULL)
return default_dpi;
resource += sizeof ("Xft.dpi:\t") - 1;
dpi = strtod (resource, &end);
g_assert (end != NULL);
if ((end == resource) || (*end != '\n'))
return default_dpi;
g_free (resources);
if (dpi < G_MINDOUBLE)
return default_dpi;
return dpi;
}
static void
greeter_canvas_text_init_layout (GreeterCanvasText *greeter_item)
{
GnomeCanvasItem *item;
GnomeCanvasText *text;
PangoContext *gtk_context, *context;
static PangoFT2FontMap *font_map;
gdouble dpi;
item = GNOME_CANVAS_ITEM (greeter_item);
text = GNOME_CANVAS_TEXT (greeter_item);
if (text->layout != NULL)
return;
gtk_context = gtk_widget_get_pango_context (GTK_WIDGET (item->canvas));
if (font_map == NULL)
{
font_map = (PangoFT2FontMap *) pango_ft2_font_map_new ();
dpi = greeter_canvas_text_get_screen_dpi (greeter_item);
pango_ft2_font_map_set_resolution (font_map, dpi, dpi);
}
context = pango_ft2_font_map_create_context (font_map);
pango_context_set_language (context,
pango_context_get_language (gtk_context));
pango_context_set_base_dir (context,
pango_context_get_base_dir (gtk_context));
pango_context_set_font_description (context,
pango_context_get_font_description (gtk_context));
text->layout = pango_layout_new (context);
g_object_unref (context);
}
static void
greeter_canvas_text_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
switch (param_id)
{
case PROP_TEXT:
greeter_canvas_text_init_layout (GREETER_CANVAS_TEXT (object));
g_object_set_property (object, "GnomeCanvasText::text", value);
break;
case PROP_MARKUP:
greeter_canvas_text_init_layout (GREETER_CANVAS_TEXT (object));
g_object_set_property (object, "GnomeCanvasText::markup", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
greeter_canvas_text_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
switch (param_id)
{
case PROP_TEXT:
g_object_get_property (object, "GnomeCanvasText::text", value);
break;
case PROP_MARKUP:
g_object_get_property (object, "GnomeCanvasText::markup", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
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