plugins: properties: show track info for whole playlist

Track Info can now be displayed for the set of
all tracks contained in a  playlist. This lets
you calculate a playlist's length, for example,
even if it is not currently playing.

This functionality can be accessed from the
existing "Properties" screen for a selected
playlist file. A line has been added at the
very bottom to show Track Info.

Change-Id: I311532b7cfa9e29d46c0cd5623ba4c06c1dd5b5f

8 files changed, 175 insertions, 103 deletions

diff --git a/apps/misc.c b/apps/misc.c
index 7ba229a6f3..b8e69d09c6 100644
--- a/apps/misc.c
+++ b/apps/misc.c
@@ -200,6 +200,29 @@ bool warn_on_pl_erase(void)
         return true;
 }
 
+bool show_search_progress(bool init, int count)
+{
+    static int last_tick = 0;
+
+    /* Don't show splashes for 1/2 second after starting search */
+    if (init)
+    {
+        last_tick = current_tick + HZ/2;
+        return true;
+    }
+
+    /* Update progress every 1/10 of a second */
+    if (TIME_AFTER(current_tick, last_tick + HZ/10))
+    {
+        splashf(0, str(LANG_PLAYLIST_SEARCH_MSG), count, str(LANG_OFF_ABORT));
+        if (action_userabort(TIMEOUT_NOBLOCK))
+            return false;
+        last_tick = current_tick;
+        yield();
+    }
+
+    return true;
+}
 
 /* Performance optimized version of the read_line() (see below) function. */
 int fast_readline(int fd, char *buf, int buf_size, void *parameters,
diff --git a/apps/misc.h b/apps/misc.h
index 28a982d1da..c6485db4ff 100644
--- a/apps/misc.h
+++ b/apps/misc.h
@@ -110,6 +110,8 @@ void talk_timedate(void);
  * returns true if the playlist should be replaced */
 bool warn_on_pl_erase(void);
 
+bool show_search_progress(bool init, int count);
+
 /* Read (up to) a line of text from fd into buffer and return number of bytes
  * read (which may be larger than the number of bytes stored in buffer). If 
  * an error occurs, -1 is returned (and buffer contains whatever could be 
diff --git a/apps/playlist.c b/apps/playlist.c
index 5a3ada8efc..3600918eb3 100644
--- a/apps/playlist.c
+++ b/apps/playlist.c
@@ -2498,75 +2498,106 @@ int playlist_insert_directory(struct playlist_info* playlist,
 }
 
 /*
- * Insert all tracks from specified playlist into dynamic playlist.
+ * If action_cb is *not* NULL, it will be called for every track contained
+ * in the playlist specified by filename. If action_cb is NULL, you must
+ * instead provide a playlist insert context to use for adding each track
+ * into a dynamic playlist.
  */
-int playlist_insert_playlist(struct playlist_info* playlist, const char *filename,
-                             int position, bool queue)
+bool playlist_entries_iterate(const char *filename,
+                              struct playlist_insert_context *pl_context,
+                              bool (*action_cb)(const char *file_name))
 {
-    int fd = -1;
+    int fd = -1, i = 0;
+    bool ret = false;
     int max;
     char *dir;
 
     char temp_buf[MAX_PATH+1];
     char trackname[MAX_PATH+1];
 
-    int result = -1;
     bool utf8 = is_m3u8_name(filename);
 
-    struct playlist_insert_context pl_context;
     cpu_boost(true);
 
-    if (playlist_insert_context_create(playlist, &pl_context, position, queue, true) >= 0)
+    fd = open_utf8(filename, O_RDONLY);
+    if (fd < 0)
     {
-        fd = open_utf8(filename, O_RDONLY);
-        if (fd < 0)
-        {
-            notify_access_error();
-            goto out;
-        }
+        notify_access_error();
+        goto out;
+    }
 
-        /* we need the directory name for formatting purposes */
-        size_t dirlen = path_dirname(filename, (const char **)&dir);
-        //dir = strmemdupa(dir, dirlen);
+    /* we need the directory name for formatting purposes */
+    size_t dirlen = path_dirname(filename, (const char **)&dir);
+    //dir = strmemdupa(dir, dirlen);
 
-        while ((max = read_line(fd, temp_buf, sizeof(temp_buf))) > 0)
-        {
-            /* user abort */
-            if (action_userabort(TIMEOUT_NOBLOCK))
-                break;
 
-            if (temp_buf[0] != '#' && temp_buf[0] != '\0')
+    if (action_cb)
+        show_search_progress(true, 0);
+
+    while ((max = read_line(fd, temp_buf, sizeof(temp_buf))) > 0)
+    {
+        /* user abort */
+        if (!action_cb && action_userabort(TIMEOUT_NOBLOCK))
+            break;
+
+        if (temp_buf[0] != '#' && temp_buf[0] != '\0')
+        {
+            i++;
+            if (!utf8)
             {
-                if (!utf8)
-                {
-                    /* Use trackname as a temporay buffer. Note that trackname must
-                     * be as large as temp_buf.
-                     */
-                    max = convert_m3u_name(temp_buf, max, sizeof(temp_buf), trackname);
-                }
+                /* Use trackname as a temporay buffer. Note that trackname must
+                 * be as large as temp_buf.
+                 */
+                max = convert_m3u_name(temp_buf, max, sizeof(temp_buf), trackname);
+            }
 
-                /* we need to format so that relative paths are correctly
-                   handled */
-                if (format_track_path(trackname, temp_buf,
-                                      sizeof(trackname), dir, dirlen) < 0)
-                {
-                    goto out;
-                }
+            /* we need to format so that relative paths are correctly
+               handled */
+            if (format_track_path(trackname, temp_buf,
+                                  sizeof(trackname), dir, dirlen) < 0)
+            {
+                goto out;
+            }
 
-                if (playlist_insert_context_add(&pl_context, trackname) < 0)
+            if (action_cb)
+            {
+                if (!action_cb(trackname))
                     goto out;
+                else if (!show_search_progress(false, i))
+                    break;
             }
-
-            /* let the other threads work */
-            yield();
+            else if (playlist_insert_context_add(pl_context, trackname) < 0)
+                goto out;
         }
-    }
 
-    result = 0;
+        /* let the other threads work */
+        yield();
+    }
+    ret = true;
 
 out:
     close(fd);
     cpu_boost(false);
+    return ret;
+}
+
+/*
+ * Insert all tracks from specified playlist into dynamic playlist.
+ */
+int playlist_insert_playlist(struct playlist_info* playlist, const char *filename,
+                             int position, bool queue)
+{
+
+    int result = -1;
+
+    struct playlist_insert_context pl_context;
+    cpu_boost(true);
+
+    if (playlist_insert_context_create(playlist, &pl_context, position, queue, true) >= 0
+         && playlist_entries_iterate(filename, &pl_context, NULL))
+        result = 0;
+
+    cpu_boost(false);
     playlist_insert_context_release(&pl_context);
     return result;
 }
diff --git a/apps/playlist.h b/apps/playlist.h
index 4d814c7523..f7426df9a3 100644
--- a/apps/playlist.h
+++ b/apps/playlist.h
@@ -159,6 +159,9 @@ int playlist_insert_directory(struct playlist_info* playlist,
                               bool recurse);
 int playlist_insert_playlist(struct playlist_info* playlist, const char *filename,
                              int position, bool queue);
+bool playlist_entries_iterate(const char *filename,
+                              struct playlist_insert_context *pl_context,
+                              bool (*action_cb)(const char *file_name));
 void playlist_skip_entry(struct playlist_info *playlist, int steps);
 int playlist_delete(struct playlist_info* playlist, int index);
 int playlist_move(struct playlist_info* playlist, int index, int new_index);
diff --git a/apps/plugin.c b/apps/plugin.c
index 931b8f1fd4..7934cc1754 100644
--- a/apps/plugin.c
+++ b/apps/plugin.c
@@ -838,6 +838,7 @@ static const struct plugin_api rockbox_api = {
     playlist_get_first_index,
     playlist_get_display_index,
     filetype_get_plugin,
+    playlist_entries_iterate,
 };
 
 static int plugin_buffer_handle;
diff --git a/apps/plugin.h b/apps/plugin.h
index df519f28cf..e9dedf02a1 100644
--- a/apps/plugin.h
+++ b/apps/plugin.h
@@ -975,6 +975,9 @@ struct plugin_api {
     int (*playlist_get_first_index)(const struct playlist_info* playlist);
     int (*playlist_get_display_index)(void);
     char* (*filetype_get_plugin)(int attr, char *buffer, size_t buffer_len);
+    bool (*playlist_entries_iterate)(const char *filename,
+                                     struct playlist_insert_context *pl_context,
+                                     bool (*action_cb)(const char *file_name));
 };
 
 /* plugin header */
diff --git a/apps/plugins/properties.c b/apps/plugins/properties.c
index ce3c03694c..32bc8b9150 100644
--- a/apps/plugins/properties.c
+++ b/apps/plugins/properties.c
@@ -19,10 +19,7 @@
  *
  ****************************************************************************/
 #include "plugin.h"
-
-#ifdef HAVE_TAGCACHE
 #include "lib/mul_id3.h"
-#endif
 
 #if !defined(ARRAY_SIZE)
     #define ARRAY_SIZE(x) (sizeof((x)) / sizeof((x)[0]))
@@ -38,6 +35,7 @@ struct dir_stats {
 
 enum props_types {
     PROPS_FILE = 0,
+    PROPS_PLAYLIST,
     PROPS_ID3,
     PROPS_MUL_ID3,
     PROPS_DIR
@@ -46,10 +44,8 @@ enum props_types {
 static int props_type = PROPS_FILE;
 
 static struct mp3entry id3;
-#ifdef HAVE_TAGCACHE
 static int mul_id3_count;
 static int skipped_count;
-#endif
 
 static char str_filename[MAX_PATH];
 static char str_dirname[MAX_PATH];
@@ -64,6 +60,7 @@ static int32_t size_unit;
 static struct tm tm;
 
 #define NUM_FILE_PROPERTIES 5
+#define NUM_PLAYLIST_PROPERTIES 1 + NUM_FILE_PROPERTIES
 static const unsigned char* const props_file[] =
 {
     ID2P(LANG_PROPERTIES_PATH),       str_dirname,
@@ -71,6 +68,7 @@ static const unsigned char* const props_file[] =
     ID2P(LANG_PROPERTIES_SIZE),       str_size,
     ID2P(LANG_PROPERTIES_DATE),       str_date,
     ID2P(LANG_PROPERTIES_TIME),       str_time,
+    ID2P(LANG_MENU_SHOW_ID3_INFO),    "...",
 };
 
 #define NUM_DIR_PROPERTIES 4
@@ -120,7 +118,8 @@ static bool file_properties(const char* selected_file)
                 log = human_size_log((unsigned long)info.size);
                 nsize = ((unsigned long)info.size) >> (log*10);
                 size_unit = units[log];
-                rb->snprintf(str_size, sizeof str_size, "%lu %s", nsize, rb->str(size_unit));
+                rb->snprintf(str_size, sizeof str_size, "%lu %s",
+                             nsize, rb->str(size_unit));
                 rb->gmtime_r(&info.mtime, &tm);
                 rb->snprintf(str_date, sizeof str_date, "%04d/%02d/%02d",
                     tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
@@ -249,7 +248,7 @@ static const char * get_props(int selected_item, void* data,
     if (PROPS_DIR == props_type)
         rb->strlcpy(buffer, selected_item >= (int)(ARRAY_SIZE(props_dir)) ? "ERROR" :
                                 (char *) p2str(props_dir[selected_item]), buffer_len);
-    else if (PROPS_FILE == props_type)
+    else
         rb->strlcpy(buffer, selected_item >= (int)(ARRAY_SIZE(props_file)) ? "ERROR" :
                                 (char *) p2str(props_file[selected_item]), buffer_len);
 
@@ -259,7 +258,8 @@ static const char * get_props(int selected_item, void* data,
 static int speak_property_selection(int selected_item, void *data)
 {
     struct dir_stats *stats = data;
-    int32_t id = P2ID((props_type == PROPS_DIR  ? props_dir : props_file)[selected_item]);
+    int32_t id = P2ID((props_type == PROPS_DIR ?
+                       props_dir : props_file)[selected_item]);
     rb->talk_id(id, false);
     switch (id)
     {
@@ -326,7 +326,8 @@ static int browse_file_or_dir(struct dir_stats *stats)
         rb->gui_synclist_set_voice_callback(&properties_lists, speak_property_selection);
     rb->gui_synclist_set_nb_items(&properties_lists,
                                   2 * (props_type == PROPS_FILE ? NUM_FILE_PROPERTIES :
-                                                                  NUM_DIR_PROPERTIES));
+                                       props_type == PROPS_PLAYLIST ? 
+                                       NUM_PLAYLIST_PROPERTIES : NUM_DIR_PROPERTIES));
     rb->gui_synclist_select_item(&properties_lists, 0);
     rb->gui_synclist_draw(&properties_lists);
     rb->gui_synclist_speak_item(&properties_lists);
@@ -339,11 +340,17 @@ static int browse_file_or_dir(struct dir_stats *stats)
             continue;
         switch(button)
         {
+            case ACTION_STD_OK:
+                if (props_type == PROPS_PLAYLIST &&
+                      rb->gui_synclist_get_sel_pos(&properties_lists)
+                        == ARRAY_SIZE(props_file) - 2)
+                    return -1;
+                break;
             case ACTION_STD_CANCEL:
-                return false;
+                return 0;
             default:
                 if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
-                    return true;
+                    return 1;
                 break;
         }
     }
@@ -372,7 +379,6 @@ static bool determine_file_or_dir(void)
     return false;
 }
 
-#ifdef HAVE_TAGCACHE
 bool mul_id3_add(const char *file_name)
 {
     if (!file_name || rb->mp3info(&id3, file_name))
@@ -385,10 +391,37 @@ bool mul_id3_add(const char *file_name)
 
     return true;
 }
+
+static bool has_pl_extension(const char* filename)
+{
+    char *dot = rb->strrchr(filename, '.');
+    return (dot && (!rb->strcasecmp(dot, ".m3u") || !rb->strcasecmp(dot, ".m3u8")));
+}
+
+/* Assemble track info from a database table or the contents of a playlist file */
+static bool assemble_track_info(const char *filename)
+{
+    props_type = PROPS_MUL_ID3;
+    mul_id3_count = skipped_count = 0;
+
+    if (     (filename && !rb->playlist_entries_iterate(filename, NULL, &mul_id3_add))
+#ifdef HAVE_TAGCACHE
+         || (!filename && !rb->tagtree_subentries_do_action(&mul_id3_add))
 #endif
+         || mul_id3_count == 0)
+        return false;
+    else if (mul_id3_count > 1) /* otherwise, the retrieved id3 can be used as-is */
+        finalize_id3(&id3);
+
+    if (skipped_count > 0)
+        rb->splashf(HZ*2, "Skipped %d", skipped_count);
+
+    return true;
+}
 
 enum plugin_status plugin_start(const void* parameter)
 {
+    int ret;
     static struct dir_stats stats =
     {
         .len = MAX_PATH,
@@ -405,23 +438,7 @@ enum plugin_status plugin_start(const void* parameter)
     rb->touchscreen_set_mode(rb->global_settings->touch_mode);
 #endif
 
-#ifdef HAVE_TAGCACHE
-    if (!rb->strcmp(file, MAKE_ACT_STR(ACTIVITY_DATABASEBROWSER))) /* db table selected */
-    {
-        props_type = PROPS_MUL_ID3;
-        mul_id3_count = skipped_count = 0;
-
-        if (!rb->tagtree_subentries_do_action(&mul_id3_add) || mul_id3_count == 0)
-            return PLUGIN_ERROR;
-        else if (mul_id3_count > 1) /* otherwise, the retrieved id3 can be used as-is */
-            finalize_id3(&id3);
-
-        if (skipped_count > 0)
-            rb->splashf(HZ*2, "Skipped %d", skipped_count);
-    }
-    else
-#endif
-    if (file[0] == '/') /* single track selected */
+    if (file[0] == '/') /* single file selected */
     {
         const char* file_name = rb->strrchr(file, '/') + 1;
         int dirlen = (file_name - file);
@@ -437,8 +454,12 @@ enum plugin_status plugin_start(const void* parameter)
             return PLUGIN_OK;
         }
 
+        if (props_type == PROPS_FILE && has_pl_extension(file))
+            props_type = PROPS_PLAYLIST;
+
         /* get the info depending on its_a_dir */
-        if(!(props_type == PROPS_DIR ? dir_properties(file, &stats) : file_properties(file)))
+        if(!(props_type == PROPS_DIR ?
+             dir_properties(file, &stats) : file_properties(file)))
         {
             /* something went wrong (to do: tell user what it was (nesting,...) */
             rb->splash(0, ID2P(LANG_PROPERTIES_FAIL));
@@ -446,20 +467,32 @@ enum plugin_status plugin_start(const void* parameter)
             return PLUGIN_OK;
         }
     }
-    else
+             /* database table selected */
+    else if (rb->strcmp(file, MAKE_ACT_STR(ACTIVITY_DATABASEBROWSER))
+             || !assemble_track_info(NULL))
         return PLUGIN_ERROR;
 
     FOR_NB_SCREENS(i)
         rb->viewportmanager_theme_enable(i, true, NULL);
 
-    bool usb =  props_type == PROPS_ID3 ?     rb->browse_id3(&id3, 0, 0, &tm, 1)  :
-#ifdef HAVE_TAGCACHE
-                props_type == PROPS_MUL_ID3 ? rb->browse_id3(&id3, 0, 0, NULL, mul_id3_count) :
-#endif
-                                              browse_file_or_dir(&stats);
+    if (props_type == PROPS_ID3)
+        ret = rb->browse_id3(&id3, 0, 0, &tm, 1);   /* Track Info for single file */
+    else if (props_type == PROPS_MUL_ID3)
+        ret = rb->browse_id3(&id3, 0, 0, NULL, mul_id3_count); /* database tracks */
+    else if ((ret = browse_file_or_dir(&stats)) < 0)
+        ret = assemble_track_info(file) ?                      /* playlist tracks */
+                rb->browse_id3(&id3, 0, 0, NULL, mul_id3_count) : -1;
 
     FOR_NB_SCREENS(i)
         rb->viewportmanager_theme_undo(i, false);
 
-    return usb ? PLUGIN_USB_CONNECTED : PLUGIN_OK;
+    switch (ret)
+    {
+        case 1:
+            return PLUGIN_USB_CONNECTED;
+        case -1:
+            return PLUGIN_ERROR;
+        default:
+            return PLUGIN_OK;
+    }
 }
diff --git a/apps/tagtree.c b/apps/tagtree.c
index 3a875d6da6..be728dcc95 100644
--- a/apps/tagtree.c
+++ b/apps/tagtree.c
@@ -1312,30 +1312,6 @@ void tagtree_init(void)
     initialize_tagtree();
 }
 
-static bool show_search_progress(bool init, int count)
-{
-    static int last_tick = 0;
-
-    /* Don't show splashes for 1/2 second after starting search */
-    if (init)
-    {
-        last_tick = current_tick + HZ/2;
-        return true;
-    }
-
-    /* Update progress every 1/10 of a second */
-    if (TIME_AFTER(current_tick, last_tick + HZ/10))
-    {
-        splashf(0, str(LANG_PLAYLIST_SEARCH_MSG), count, str(LANG_OFF_ABORT));
-        if (action_userabort(TIMEOUT_NOBLOCK))
-            return false;
-        last_tick = current_tick;
-        yield();
-    }
-
-    return true;
-}
-
 static int format_str(struct tagcache_search *tcs, struct display_format *fmt,
                       char *buf, int buf_size)
 {