env vars documentation

[smdp.git] / src / viewer.c

diff --git a/src/viewer.c b/src/viewer.c
index 56291db..89365bf 100644 (file)
--- a/src/viewer.c
+++ b/src/viewer.c
@@ -61,6 +61,18 @@ static short red_ramp_invert[24]   = { 15, 231, 231, 224, 224, 225,
                                       206, 207, 201, 200, 199, 199,
                                       198, 198, 197, 197, 196, 196};
 
+// unordered list characters
+//
+// override via env vars:
+// export MDP_LIST_OPEN1="    " MDP_LIST_OPEN2="    " MDP_LIST_OPEN3="    "
+// export MDP_LIST_HEAD1=" ■  " MDP_LIST_HEAD2=" ●  " MDP_LIST_HEAD3=" ▫  "
+static const char *list_open1 = " |  ";
+static const char *list_open2 = " |  ";
+static const char *list_open3 = " |  ";
+static const char *list_head1 = " +- ";
+static const char *list_head2 = " +- ";
+static const char *list_head3 = " +- ";
+
 int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reload, int noreload, int slidenum) {
 
     int c = 0;          // char
@@ -517,51 +529,29 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa
     return reload;
 }
 
-static const char *list_open1 = " |  ";
-static const char *list_open2 = " |  ";
-static const char *list_open3 = " |  ";
-static const char *list_head1 = " +- ";
-static const char *list_head2 = " +- ";
-static const char *list_head3 = " +- ";
-/*
-
-export MDP_LIST_OPEN3="    "
-export MDP_LIST_OPEN2="    "
-export MDP_LIST_OPEN3="    "
-export MDP_LIST_HEAD1=" ■  "
-export MDP_LIST_HEAD2=" ▫  "
-export MDP_LIST_HEAD3=" ●  "
-
-export MDP_LIST_OPEN2=" │  "
-export MDP_LIST_OPEN2=" │  "
-export MDP_LIST_OPEN3=" │  "
-export MDP_LIST_HEAD1=" ▇─ "
-export MDP_LIST_HEAD2=" ▓─ "
-export MDP_LIST_HEAD3=" ▒─ "
-*
-*/
 void setup_list_strings(void)
 {
     const char *str;
 
-    if ((str = getenv("MDP_LIST_OPEN")) != NULL) {
+    /* utf8 can require 6 bytes */
+    if ((str = getenv("MDP_LIST_OPEN")) != NULL && strlen(str) <= 4*6) {
         list_open1 = list_open2 = list_open3 = str;
     } else {
-        if ((str = getenv("MDP_LIST_OPEN1")) != NULL)
+        if ((str = getenv("MDP_LIST_OPEN1")) != NULL && strlen(str) <= 4*6)
             list_open1 = str;
-        if ((str = getenv("MDP_LIST_OPEN2")) != NULL)
+        if ((str = getenv("MDP_LIST_OPEN2")) != NULL && strlen(str) <= 4*6)
             list_open2 = str;
-        if ((str = getenv("MDP_LIST_OPEN3")) != NULL)
+        if ((str = getenv("MDP_LIST_OPEN3")) != NULL && strlen(str) <= 4*6)
             list_open3 = str;
     }
-    if ((str = getenv("MDP_LIST_HEAD")) != NULL) {
+    if ((str = getenv("MDP_LIST_HEAD")) != NULL && strlen(str) <= 4*6) {
         list_head1 = list_head2 = list_head3 = str;
     } else {
-        if ((str = getenv("MDP_LIST_HEAD1")) != NULL)
+        if ((str = getenv("MDP_LIST_HEAD1")) != NULL && strlen(str) <= 4*6)
             list_head1 = str;
-        if ((str = getenv("MDP_LIST_HEAD2")) != NULL)
+        if ((str = getenv("MDP_LIST_HEAD2")) != NULL && strlen(str) <= 4*6)
             list_head2 = str;
-        if ((str = getenv("MDP_LIST_HEAD3")) != NULL)
+        if ((str = getenv("MDP_LIST_HEAD3")) != NULL && strlen(str) <= 4*6)
             list_head3 = str;
     }
 }