Code

screen_*: eliminate redundant wrefresh() calls
[ncmpc.git] / src / screen_lyrics.c
index 0e21536b2f0c5ea2fa643d23a04ef556686f9d99..b937e79bc3792ca16030d766178989d746faec9c 100644 (file)
@@ -1,25 +1,25 @@
 /* ncmpc (Ncurses MPD Client)
- * (c) 2004-2010 The Music Player Daemon Project
+ * (c) 2004-2017 The Music Player Daemon Project
  * Project homepage: http://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.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
+ */
 
 #include "screen_lyrics.h"
 #include "screen_interface.h"
-#include "screen_message.h"
+#include "screen_status.h"
 #include "screen_file.h"
 #include "screen_song.h"
 #include "i18n.h"
 #include "screen.h"
 #include "lyrics.h"
 #include "screen_text.h"
+#include "screen_utils.h"
+#include "ncu.h"
 
 #include <assert.h>
+#include <errno.h>
 #include <sys/stat.h>
+#include <sys/wait.h>
 #include <stdlib.h>
 #include <string.h>
 #include <glib.h>
@@ -41,6 +45,8 @@ static struct screen_text text;
 
 static struct mpd_song *next_song;
 static bool follow = false;
+/** Set if the cursor position shall be kept during the next lyrics update. */
+static bool reloading = false;
 
 static struct {
        struct mpd_song *song;
@@ -111,10 +117,9 @@ static bool
 exists_lyr_file(const char *artist, const char *title)
 {
        char path[1024];
-       struct stat result;
-
        path_lyr_file(path, 1024, artist, title);
 
+       struct stat result;
        return (stat(path, &result) == 0);
 }
 
@@ -122,7 +127,6 @@ static FILE *
 create_lyr_file(const char *artist, const char *title)
 {
        char path[1024];
-
        snprintf(path, 1024, "%s/.lyrics",
                 getenv("HOME"));
        mkdir(path, S_IRWXU);
@@ -135,14 +139,11 @@ create_lyr_file(const char *artist, const char *title)
 static int
 store_lyr_hd(void)
 {
-       FILE *lyr_file;
-       unsigned i;
-
-       lyr_file = create_lyr_file(current.artist, current.title);
+       FILE *lyr_file = create_lyr_file(current.artist, current.title);
        if (lyr_file == NULL)
                return -1;
 
-       for (i = 0; i < text.lines->len; ++i)
+       for (unsigned i = 0; i < text.lines->len; ++i)
                fprintf(lyr_file, "%s\n",
                        (const char*)g_ptr_array_index(text.lines, i));
 
@@ -153,11 +154,10 @@ store_lyr_hd(void)
 static int
 delete_lyr_hd(void)
 {
-       char path[1024];
-
        if (!exists_lyr_file(current.artist, current.title))
                return -1;
 
+       char path[1024];
        path_lyr_file(path, 1024, current.artist, current.title);
        if (unlink(path) != 0)
                return -2;
@@ -168,7 +168,19 @@ delete_lyr_hd(void)
 static void
 screen_lyrics_set(const GString *str)
 {
-       screen_text_set(&text, str);
+       if (reloading) {
+               unsigned saved_start = text.lw->start;
+
+               screen_text_set(&text, str->str);
+
+               /* restore the cursor and ensure that it's still valid */
+               text.lw->start = saved_start;
+               list_window_fetch_cursor(text.lw);
+       } else {
+               screen_text_set(&text, str->str);
+       }
+
+       reloading = false;
 
        /* paint new data */
 
@@ -177,7 +189,7 @@ screen_lyrics_set(const GString *str)
 
 static void
 screen_lyrics_callback(const GString *result, const bool success,
-                      const char *plugin_name, G_GNUC_UNUSED void *data)
+                      const char *plugin_name, gcc_unused void *data)
 {
        assert(current.loader != NULL);
 
@@ -206,7 +218,7 @@ screen_lyrics_callback(const GString *result, const bool success,
 }
 
 static gboolean
-screen_lyrics_timeout_callback(gpointer G_GNUC_UNUSED data)
+screen_lyrics_timeout_callback(gpointer gcc_unused data)
 {
        plugin_stop(current.loader);
        current.loader = NULL;
@@ -221,15 +233,13 @@ screen_lyrics_timeout_callback(gpointer G_GNUC_UNUSED data)
 static void
 screen_lyrics_load(const struct mpd_song *song)
 {
-       const char *artist, *title;
-
        assert(song != NULL);
 
        screen_lyrics_abort();
        screen_text_clear(&text);
 
-       artist = mpd_song_get_tag(song, MPD_TAG_ARTIST, 0);
-       title = mpd_song_get_tag(song, MPD_TAG_TITLE, 0);
+       const char *artist = mpd_song_get_tag(song, MPD_TAG_ARTIST, 0);
+       const char *title = mpd_song_get_tag(song, MPD_TAG_TITLE, 0);
 
        current.song = mpd_song_dup(song);
        current.artist = g_strdup(artist);
@@ -246,6 +256,18 @@ screen_lyrics_load(const struct mpd_song *song)
        }
 }
 
+static void
+screen_lyrics_reload(void)
+{
+       if (current.loader == NULL && current.artist != NULL &&
+           current.title != NULL) {
+               reloading = true;
+               current.loader = lyrics_load(current.artist, current.title,
+                                            screen_lyrics_callback, NULL);
+               screen_text_repaint(&text);
+       }
+}
+
 static void
 lyrics_screen_init(WINDOW *w, int cols, int rows)
 {
@@ -313,9 +335,12 @@ lyrics_title(char *str, size_t size)
                n = snprintf(str, size, "%s: %s - %s",
                             _("Lyrics"),
                             current.artist, current.title);
-               if (options.lyrics_show_plugin && current.plugin_name != NULL)
+
+               if (options.lyrics_show_plugin && current.plugin_name != NULL &&
+                   (unsigned int) n < size - 1)
                        snprintf(str + n, size - n, " (%s)",
                                 current.plugin_name);
+
                return str;
        } else
                return _("Lyrics");
@@ -327,6 +352,72 @@ lyrics_paint(void)
        screen_text_paint(&text);
 }
 
+/* save current lyrics to a file and run editor on it */
+static void
+lyrics_edit(void)
+{
+       char *editor = options.text_editor;
+       if (editor == NULL) {
+               screen_status_message(_("Editor not configured"));
+               return;
+       }
+
+       if (options.text_editor_ask) {
+               char *buf = g_strdup_printf(
+                   _("Do you really want to start an editor and edit these lyrics [%s/%s]? "),
+                                           YES, NO);
+               bool really = screen_get_yesno(buf, false);
+               g_free(buf);
+               if (!really) {
+                       screen_status_message(_("Aborted"));
+                       return;
+               }
+       }
+
+       if (store_lyr_hd() < 0)
+               return;
+
+       ncu_deinit();
+
+       /* TODO: fork/exec/wait won't work on Windows, but building a command
+          string for system() is too tricky */
+       int status;
+       pid_t pid = fork();
+       if (pid == -1) {
+               screen_status_printf(("%s (%s)"), _("Can't start editor"), g_strerror(errno));
+               ncu_init();
+               return;
+       } else if (pid == 0) {
+               char path[1024];
+               path_lyr_file(path, sizeof(path), current.artist, current.title);
+               execlp(editor, editor, path, NULL);
+               /* exec failed, do what system does */
+               _exit(127);
+       } else {
+               int ret;
+               do {
+                       ret = waitpid(pid, &status, 0);
+               } while (ret == -1 && errno == EINTR);
+       }
+
+       ncu_init();
+
+       /* TODO: hardly portable */
+       if (WIFEXITED(status)) {
+               if (WEXITSTATUS(status) == 0)
+                       /* update to get the changes */
+                       screen_lyrics_reload();
+               else if (WEXITSTATUS(status) == 127)
+                       screen_status_message(_("Can't start editor"));
+               else
+                       screen_status_printf(_("Editor exited unexpectedly (%d)"),
+                                            WEXITSTATUS(status));
+       } else if (WIFSIGNALED(status)) {
+               screen_status_printf(_("Editor exited unexpectedly (signal %d)"),
+                                    WTERMSIG(status));
+       }
+}
+
 static bool
 lyrics_cmd(struct mpdclient *c, command_t cmd)
 {
@@ -362,16 +453,14 @@ lyrics_cmd(struct mpdclient *c, command_t cmd)
        case CMD_LYRICS_UPDATE:
                if (c->song != NULL) {
                        screen_lyrics_load(c->song);
-                       screen_text_repaint(&text);
+                       screen_text_paint(&text);
                }
                return true;
+       case CMD_EDIT:
+               lyrics_edit();
+               return true;
        case CMD_SELECT:
-               if (current.loader == NULL && current.artist != NULL &&
-                   current.title != NULL) {
-                       current.loader = lyrics_load(current.artist, current.title,
-                                                    screen_lyrics_callback, NULL);
-                       screen_text_repaint(&text);
-               }
+               screen_lyrics_reload();
                return true;
 
 #ifdef ENABLE_SONG_SCREEN