playlist: moved code to playlist_state.c

Moved everything related to saving or loading the playlist from/to the
state file to playlist_state.c.

1 files changed, 175 insertions, 0 deletions

diff --git a/src/playlist_state.c b/src/playlist_state.c
new file mode 100644
index 000000000..7541a353f
--- /dev/null
+++ b/src/playlist_state.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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
+ */
+
+/*
+ * Saving and loading the playlist to/from the state file.
+ *
+ */
+
+#include "playlist_state.h"
+#include "playlist.h"
+#include "player_control.h"
+#include "queue_save.h"
+#include "path.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+#define PLAYLIST_STATE_FILE_STATE		"state: "
+#define PLAYLIST_STATE_FILE_RANDOM		"random: "
+#define PLAYLIST_STATE_FILE_REPEAT		"repeat: "
+#define PLAYLIST_STATE_FILE_CURRENT		"current: "
+#define PLAYLIST_STATE_FILE_TIME		"time: "
+#define PLAYLIST_STATE_FILE_CROSSFADE		"crossfade: "
+#define PLAYLIST_STATE_FILE_PLAYLIST_BEGIN	"playlist_begin"
+#define PLAYLIST_STATE_FILE_PLAYLIST_END	"playlist_end"
+
+#define PLAYLIST_STATE_FILE_STATE_PLAY		"play"
+#define PLAYLIST_STATE_FILE_STATE_PAUSE		"pause"
+#define PLAYLIST_STATE_FILE_STATE_STOP		"stop"
+
+#define PLAYLIST_BUFFER_SIZE	2*MPD_PATH_MAX
+
+void
+playlist_state_save(FILE *fp, const struct playlist *playlist)
+{
+	fprintf(fp, "%s", PLAYLIST_STATE_FILE_STATE);
+
+	if (playlist->playing) {
+		switch (getPlayerState()) {
+		case PLAYER_STATE_PAUSE:
+			fprintf(fp, "%s\n", PLAYLIST_STATE_FILE_STATE_PAUSE);
+			break;
+		default:
+			fprintf(fp, "%s\n", PLAYLIST_STATE_FILE_STATE_PLAY);
+		}
+		fprintf(fp, "%s%i\n", PLAYLIST_STATE_FILE_CURRENT,
+			queue_order_to_position(&playlist->queue,
+						playlist->current));
+		fprintf(fp, "%s%i\n", PLAYLIST_STATE_FILE_TIME,
+			getPlayerElapsedTime());
+	} else
+		fprintf(fp, "%s\n", PLAYLIST_STATE_FILE_STATE_STOP);
+
+	fprintf(fp, "%s%i\n", PLAYLIST_STATE_FILE_RANDOM,
+		playlist->queue.random);
+	fprintf(fp, "%s%i\n", PLAYLIST_STATE_FILE_REPEAT,
+		playlist->queue.repeat);
+	fprintf(fp, "%s%i\n", PLAYLIST_STATE_FILE_CROSSFADE,
+		(int)(getPlayerCrossFade()));
+	fprintf(fp, "%s\n", PLAYLIST_STATE_FILE_PLAYLIST_BEGIN);
+	queue_save(fp, &playlist->queue);
+	fprintf(fp, "%s\n", PLAYLIST_STATE_FILE_PLAYLIST_END);
+}
+
+static void
+playlist_state_load(FILE *fp, struct playlist *playlist,
+		    char *buffer,
+		    int state, int current, int seek_time)
+{
+	int song;
+
+	if (!fgets(buffer, PLAYLIST_BUFFER_SIZE, fp)) {
+		g_warning("No playlist in state file");
+		return;
+	}
+
+	while (!g_str_has_prefix(buffer, PLAYLIST_STATE_FILE_PLAYLIST_END)) {
+		g_strchomp(buffer);
+
+		song = queue_load_song(&playlist->queue, buffer);
+		if (song >= 0 && song == current) {
+			if (state != PLAYER_STATE_STOP) {
+				playPlaylist(queue_length(&playlist->queue) - 1);
+			}
+			if (state == PLAYER_STATE_PAUSE) {
+				playerPause();
+			}
+			if (state != PLAYER_STATE_STOP) {
+				seekSongInPlaylist(queue_length(&playlist->queue) - 1,
+						   seek_time);
+			}
+		}
+
+		if (!fgets(buffer, PLAYLIST_BUFFER_SIZE, fp)) {
+			g_warning("'%s' not found in state file",
+				  PLAYLIST_STATE_FILE_PLAYLIST_END);
+			break;
+		}
+	}
+}
+
+void
+playlist_state_restore(FILE *fp, struct playlist *playlist)
+{
+	int current = -1;
+	int seek_time = 0;
+	int state = PLAYER_STATE_STOP;
+	char buffer[PLAYLIST_BUFFER_SIZE];
+	bool random_mode = false;
+
+	while (fgets(buffer, sizeof(buffer), fp)) {
+		g_strchomp(buffer);
+
+		if (g_str_has_prefix(buffer, PLAYLIST_STATE_FILE_STATE)) {
+			if (strcmp(&(buffer[strlen(PLAYLIST_STATE_FILE_STATE)]),
+				   PLAYLIST_STATE_FILE_STATE_PLAY) == 0) {
+				state = PLAYER_STATE_PLAY;
+			} else
+			    if (strcmp
+				(&(buffer[strlen(PLAYLIST_STATE_FILE_STATE)]),
+				 PLAYLIST_STATE_FILE_STATE_PAUSE)
+				== 0) {
+				state = PLAYER_STATE_PAUSE;
+			}
+		} else if (g_str_has_prefix(buffer, PLAYLIST_STATE_FILE_TIME)) {
+			seek_time =
+			    atoi(&(buffer[strlen(PLAYLIST_STATE_FILE_TIME)]));
+		} else
+		    if (g_str_has_prefix(buffer, PLAYLIST_STATE_FILE_REPEAT)) {
+			if (strcmp
+			    (&(buffer[strlen(PLAYLIST_STATE_FILE_REPEAT)]),
+			     "1") == 0) {
+				setPlaylistRepeatStatus(true);
+			} else
+				setPlaylistRepeatStatus(false);
+		} else if (g_str_has_prefix(buffer, PLAYLIST_STATE_FILE_CROSSFADE)) {
+			setPlayerCrossFade(atoi
+					   (&
+					    (buffer
+					     [strlen
+					      (PLAYLIST_STATE_FILE_CROSSFADE)])));
+		} else if (g_str_has_prefix(buffer, PLAYLIST_STATE_FILE_RANDOM)) {
+			random_mode =
+				strcmp(buffer + strlen(PLAYLIST_STATE_FILE_RANDOM),
+				       "1") == 0;
+		} else if (g_str_has_prefix(buffer, PLAYLIST_STATE_FILE_CURRENT)) {
+			current = atoi(&(buffer
+					 [strlen
+					  (PLAYLIST_STATE_FILE_CURRENT)]));
+		} else if (g_str_has_prefix(buffer,
+					    PLAYLIST_STATE_FILE_PLAYLIST_BEGIN)) {
+			if (state == PLAYER_STATE_STOP)
+				current = -1;
+			playlist_state_load(fp, playlist, buffer, state,
+					    current, seek_time);
+		}
+	}
+
+	setPlaylistRandomStatus(random_mode);
+}