yahoo_doodle.c

Linux下的多协议即时通讯程序源代码

	g_list_free(d_list);
}

void yahoo_doodle_command_got_clear(PurpleConnection *gc, const char *from)
{
	PurpleAccount *account;
	PurpleWhiteboard *wb;

	purple_debug_info("yahoo", "doodle: Got Clear (%s)\n", from);

	account = purple_connection_get_account(gc);

	/* Only handle this if local client requested Doodle session (else local
	 * client would have sent one)
	 */
	wb = purple_whiteboard_get_session(account, from);

	if(wb == NULL)
		return;

	if(wb->state == DOODLE_STATE_ESTABLISHED)
	{
		/* TODO Ask user whether to save the image before clearing it */

		purple_whiteboard_clear(wb);
	}
}

void
yahoo_doodle_command_got_extra(PurpleConnection *gc, const char *from, const char *message)
{
	purple_debug_info("yahoo", "doodle: Got Extra (%s)\n", from);

	/* I do not like these 'extra' features, so I'll only handle them in one
	 * way, which is returning them with the command/packet to turn them off
	 */
	yahoo_doodle_command_send_extra(gc, from, DOODLE_EXTRA_NONE);
}

void yahoo_doodle_command_got_confirm(PurpleConnection *gc, const char *from)
{
	PurpleAccount *account;
	PurpleWhiteboard *wb;

	purple_debug_info("yahoo", "doodle: Got Confirm (%s)\n", from);

	/* Get the doodle session */
	account = purple_connection_get_account(gc);

	/* Only handle this if local client requested Doodle session (else local
	 * client would have sent one)
	 */
	wb = purple_whiteboard_get_session(account, from);

	if(wb == NULL)
		return;

	/* TODO Combine the following IF's? */

	/* Check if we requested a doodle session */
	if(wb->state == DOODLE_STATE_REQUESTING)
	{
		wb->state = DOODLE_STATE_ESTABLISHED;

		purple_whiteboard_start(wb);

		yahoo_doodle_command_send_confirm(gc, from);
	}

	/* Check if we accepted a request for a doodle session */
	if(wb->state == DOODLE_STATE_REQUESTED)
	{
		wb->state = DOODLE_STATE_ESTABLISHED;

		purple_whiteboard_start(wb);
	}
}

void yahoo_doodle_command_got_shutdown(PurpleConnection *gc, const char *from)
{
	PurpleAccount *account;
	PurpleWhiteboard *wb;

	g_return_if_fail(from != NULL);

	purple_debug_info("yahoo", "doodle: Got Shutdown (%s)\n", from);

	account = purple_connection_get_account(gc);

	/* Only handle this if local client requested Doodle session (else local
	 * client would have sent one)
	 */
	wb = purple_whiteboard_get_session(account, from);

	/* TODO Ask if user wants to save picture before the session is closed */

	/* If this session doesn't exist, don't try and kill it */
	if(wb == NULL)
		return;
	else
	{
		purple_whiteboard_destroy(wb);

		/* yahoo_doodle_command_send_shutdown(gc, from); */
	}
}

static void yahoo_doodle_command_send_generic(const char *type,
											  PurpleConnection *gc,
											  const char *to,
											  const char *message,
											  const char *thirteen,
											  const char *sixtythree,
											  const char *sixtyfour)
{
	struct yahoo_data *yd;
	struct yahoo_packet *pkt;

	purple_debug_info("yahoo", "doodle: Sent %s (%s)\n", type, to);

	yd = gc->proto_data;

	/* Make and send an acknowledge (ready) Doodle packet */
	pkt = yahoo_packet_new(YAHOO_SERVICE_P2PFILEXFER, YAHOO_STATUS_AVAILABLE, 0);
	yahoo_packet_hash_str(pkt, 49,  "IMVIRONMENT");
	yahoo_packet_hash_str(pkt, 1,    purple_account_get_username(gc->account));
	yahoo_packet_hash_str(pkt, 14,   message);
	yahoo_packet_hash_str(pkt, 13,   thirteen);
	yahoo_packet_hash_str(pkt, 5,    to);
	yahoo_packet_hash_str(pkt, 63,   sixtythree ? sixtythree : "doodle;11");
	yahoo_packet_hash_str(pkt, 64,   sixtyfour);
	yahoo_packet_hash_str(pkt, 1002, "1");

	yahoo_packet_send_and_free(pkt, yd);
}

void yahoo_doodle_command_send_request(PurpleConnection *gc, const char *to)
{
	yahoo_doodle_command_send_generic("Request", gc, to, "1", "1", NULL, "1");
}

void yahoo_doodle_command_send_ready(PurpleConnection *gc, const char *to)
{
	yahoo_doodle_command_send_generic("Ready", gc, to, "", "0", NULL, "0");
}

void yahoo_doodle_command_send_draw(PurpleConnection *gc, const char *to, const char *message)
{
	yahoo_doodle_command_send_generic("Draw", gc, to, message, "3", NULL, "1");
}

void yahoo_doodle_command_send_clear(PurpleConnection *gc, const char *to)
{
	yahoo_doodle_command_send_generic("Clear", gc, to, " ", "2", NULL, "1");
}

void yahoo_doodle_command_send_extra(PurpleConnection *gc, const char *to, const char *message)
{
	yahoo_doodle_command_send_generic("Extra", gc, to, message, "4", NULL, "1");
}

void yahoo_doodle_command_send_confirm(PurpleConnection *gc, const char *to)
{
	yahoo_doodle_command_send_generic("Confirm", gc, to, "1", "5", NULL, "1");
}

void yahoo_doodle_command_send_shutdown(PurpleConnection *gc, const char *to)
{
	yahoo_doodle_command_send_generic("Shutdown", gc, to, "", "0", ";0", "0");
}

void yahoo_doodle_start(PurpleWhiteboard *wb)
{
	doodle_session *ds = g_new0(doodle_session, 1);

	/* purple_debug_debug("yahoo", "doodle: yahoo_doodle_start()\n"); */

	/* Set default brush size and color */
	ds->brush_size  = DOODLE_BRUSH_SMALL;
	ds->brush_color = DOODLE_COLOR_RED;

	wb->proto_data = ds;
}

void yahoo_doodle_end(PurpleWhiteboard *wb)
{
	PurpleConnection *gc = purple_account_get_connection(wb->account);

	/* g_debug_debug("yahoo", "doodle: yahoo_doodle_end()\n"); */

	yahoo_doodle_command_send_shutdown(gc, wb->who);

	g_free(wb->proto_data);
}

void yahoo_doodle_get_dimensions(const PurpleWhiteboard *wb, int *width, int *height)
{
	/* standard Doodle canvases are of one size:  368x256 */
	*width = DOODLE_CANVAS_WIDTH;
	*height = DOODLE_CANVAS_HEIGHT;
}

static char *yahoo_doodle_build_draw_string(doodle_session *ds, GList *draw_list)
{
	GString *message;

	g_return_val_if_fail(draw_list != NULL, NULL);

	message = g_string_new("");
	g_string_printf(message, "\"%d,%d", ds->brush_color, ds->brush_size);

	for(; draw_list != NULL; draw_list = draw_list->next)
	{
		g_string_append_printf(message, ",%d", GPOINTER_TO_INT(draw_list->data));
	}
	g_string_append_c(message, '"');

	return g_string_free(message, FALSE);
}

void yahoo_doodle_send_draw_list(PurpleWhiteboard *wb, GList *draw_list)
{
	doodle_session *ds = wb->proto_data;
	char *message;

	g_return_if_fail(draw_list != NULL);

	message = yahoo_doodle_build_draw_string(ds, draw_list);
		yahoo_doodle_command_send_draw(wb->account->gc, wb->who, message);
	g_free(message);
}

void yahoo_doodle_clear(PurpleWhiteboard *wb)
{
	yahoo_doodle_command_send_clear(wb->account->gc, wb->who);
}


/* Traverse through the list and draw the points and lines */
void yahoo_doodle_draw_stroke(PurpleWhiteboard *wb, GList *draw_list)
{
	int brush_color;
	int brush_size;
	int x;
	int y;

	g_return_if_fail(draw_list != NULL);

	brush_color = GPOINTER_TO_INT(draw_list->data);
	draw_list = draw_list->next;
	g_return_if_fail(draw_list != NULL);

	brush_size = GPOINTER_TO_INT(draw_list->data);
	draw_list = draw_list->next;
	g_return_if_fail(draw_list != NULL);

	x = GPOINTER_TO_INT(draw_list->data);
	draw_list = draw_list->next;
	g_return_if_fail(draw_list != NULL);

	y = GPOINTER_TO_INT(draw_list->data);
	draw_list = draw_list->next;
	g_return_if_fail(draw_list != NULL);

	/*
	purple_debug_debug("yahoo", "doodle: Drawing: color=%d, size=%d, (%d,%d)\n", brush_color, brush_size, x, y);
	*/

	while(draw_list != NULL && draw_list->next != NULL)
	{
		int dx = GPOINTER_TO_INT(draw_list->data);
		int dy = GPOINTER_TO_INT(draw_list->next->data);

		purple_whiteboard_draw_line(wb,
								  x, y,
								  x + dx, y + dy,
								  brush_color, brush_size);

		x += dx;
		y += dy;

		draw_list = draw_list->next->next;
	}
}

void yahoo_doodle_get_brush(const PurpleWhiteboard *wb, int *size, int *color)
{
	doodle_session *ds = (doodle_session *)wb->proto_data;
	*size = ds->brush_size;
	*color = ds->brush_color;
}

void yahoo_doodle_set_brush(PurpleWhiteboard *wb, int size, int color)
{
	doodle_session *ds = (doodle_session *)wb->proto_data;
	ds->brush_size = size;
	ds->brush_color = color;

	/* Notify the core about the changes */
	purple_whiteboard_set_brush(wb, size, color);
}