Many additions and improvements

Basic previews, priority setting, better -m option

ctpv.c

@@ -118,15 +118,19 @@ static int list(void)
 
     size_t len;
     Preview p, **list = get_previews_list(&len);
-    const char *t, *s;
+    const char *e, *t, *s;
 
     puts("List of available previews:");
 
     for (size_t i = 0; i < len; i++) {
         p = *list[i];
+        e = p.ext;
         t = p.type;
         s = p.subtype;
 
+        if (!e)
+            e = any_type;
+
         if (!t) {
             t = any_type;
             s = any_type;
@@ -134,10 +138,10 @@ static int list(void)
             s = any_type;
         }
 
-        printf("\t%s/%s\n", t, s);
+        printf("\t%-15s .%-6s %s/%s\n", p.name, e, t, s);
     }
 
-    puts("\nNote: '" ANY_TYPE "' means that it matches any mimetype.");
+    puts("\nNote: '" ANY_TYPE "' means that it matches any.");
     return OK;
 }
 

prev/any.sh

@@ -0,0 +1 @@
+exiftool "$f" || true

prev/file.sh

@@ -1 +0,0 @@
-echo "$f"

prev/json.sh

@@ -0,0 +1 @@
+jq -C . "$f"

prev/markdown.sh

@@ -0,0 +1 @@
+mdcat --columns "$w" "$f"

prev/text.sh

@@ -0,0 +1,24 @@
+if exists bat; then
+    batcmd=bat
+elif exists batcat; then
+    batcmd=batcat
+else
+    batcmd=
+fi
+
+if [ -n "$batcmd" ]; then
+    "$batcmd" --color always        \
+              --style plain         \
+              --paging never        \
+              --terminal-width "$w" \
+              --wrap character      \
+              -- "$f"
+elif exists highlight; then
+    highlight --replace-tabs=4 --out-format=ansi \
+              --style='pablo' --force -- "$f"
+elif exists source-highlight; then
+    source-highlight --tab=4 --out-format=esc \
+              --style=esc256.style --failsafe -i "$f"
+else
+    cat "$f"
+fi

prev/wrapper.sh

@@ -0,0 +1,4 @@
+[ -L "$f" ] && printf 'Symlink: \n%s\n\n' "$(readlink "$f")"
+
+# Pretend that preview failed so another is run
+exit 127

preview.c

@@ -18,31 +18,21 @@ static int cmp_previews(const void *p1, const void *p2)
     Preview *pr1 = *(Preview **)p1;
     Preview *pr2 = *(Preview **)p2;
 
-    if (pr1->ext && pr2->ext)
-        return strcmp(pr1->ext, pr2->ext);
-    else if (!pr1->ext && pr2->ext)
-        return 1;
-    else if (pr1->ext && !pr2->ext)
-        return -1;
+    int i;
 
-    if (!pr1->type && pr2->type)
-        return 1;
-    else if (pr1->type && !pr2->type)
-        return -1;
-    else if (!pr1->type && !pr2->type)
-        return 0;
+    if ((i = pr2->priority - pr1->priority) != 0)
+        return i;
 
-    if (!pr1->subtype && pr2->subtype)
-        return 1;
-    else if (pr1->subtype && !pr2->subtype)
-        return -1;
+    if ((i = strcmpnull(pr1->ext, pr2->ext)) != 0)
+        return -i;
 
-    int ret = strcmp(pr1->type, pr2->type);
+    if ((i = strcmpnull(pr1->type, pr2->type)) != 0)
+        return -i;
 
-    if (ret == 0 && pr1->subtype && pr2->subtype)
-        return strcmp(pr1->subtype, pr2->subtype);
+    if ((i = strcmpnull(pr1->subtype, pr2->subtype)) != 0)
+        return i;
 
-    return ret;
+    return i;
 }
 
 void init_previews(Preview *ps, size_t len)
@@ -99,23 +89,16 @@ static Preview *find_preview(char const *mimetype, char const *ext, size_t *i)
     for (; *i < prevs_len; (*i)++) {
         p = prevs[*i];
 
-        if (!p->ext && !p->type)
-            return p;
-
-        if (p->ext && !ext)
+        if (p->ext && strcmpnull(p->ext, ext) != 0)
             continue;
 
-        if (p->ext && strcmp(ext, p->ext) == 0)
-            return p;
-
-        if (p->type && strcmp(t, p->type) != 0)
+        if (p->type && strcmpnull(p->type, t) != 0)
             continue;
 
-        if (p->type && !p->subtype)
-            return p;
+        if (p->subtype && strcmpnull(p->subtype, s) != 0)
+            continue;
 
-        if (p->subtype && strcmp(s, p->subtype) == 0)
-            return p;
+        return p;
     }
 
     return NULL;

preview.h

@@ -4,7 +4,8 @@
 #include <stdlib.h>
 
 typedef struct {
-    char *ext, *type, *subtype, *script;
+    char *name, *ext, *type, *subtype, *script;
+    int priority;
 } Preview;
 
 typedef struct {

previews.h

@@ -1,4 +1,5 @@
 #include <stdlib.h>
+#include <limits.h>
 
 #include "gen/prev/scripts.h"
 #include "preview.h"
@@ -7,10 +8,13 @@
  * This file is supposed to be included in ctpv.c
  */
 
-#define P(e, t, s, f) { e, t, s, f }
+#define PP(e, t, s, n, p) { #n, e, t, s, prev_scr_##n##_sh, p }
+#define PR(e, t, s, n) PP(e, t, s, n, 0)
 
 Preview previews[] = {
-    P(NULL,   "text",           "plain",          prev_scr_file_sh),
+    PP(NULL,      NULL,             NULL,             wrapper, INT_MAX),
+    PR(NULL,      "text",           NULL,             text),
+    PR(NULL,      NULL,             NULL,             any),
+    PR("md",      NULL,             NULL,             markdown),
+    PR(NULL,      "application",    "json",           json),
 };
-
-#undef P

utils.c

@@ -55,6 +55,18 @@ int spawn(char *args[], pid_t *cpid, int *exitcode, int *fds[2])
     return OK;
 }
 
+int strcmpnull(char const *s1, char const *s2)
+{
+    if (!s1 && !s2)
+        return 0;
+    else if (s1 && !s2)
+        return 1;
+    else if (!s1 && s2)
+        return -1;
+
+    return strcmp(s1, s2);
+}
+
 CharVec char_v_new(size_t cap)
 {
     CharVec v;

utils.h

@@ -25,6 +25,8 @@ extern char *program;
 
 int spawn(char *args[], pid_t *cpid, int *exitcode, int *fds[2]);
 
+int strcmpnull(char const *s1, char const *s2);
+
 CharVec char_v_new(size_t cap);
 void char_v_append(CharVec *v, char c);
 void char_v_free(CharVec *v);