image previews can now be disabled

config.h

@@ -1,4 +1,5 @@
 #define SETTINGS_LINE_NUMBERS 2 /* 0 is disabled, 1 is enabled, 2 is relative */
+#define SETTINGS_UEBERZUG_IMAGE_PREVIEW 1 /* 0 is disabled, 1 is enabled, 2 is with caching */
 
 /* {{{ */
 #ifndef CONFIG_GUARD

file_previews.c

@@ -1,9 +1,14 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include "backend.h"
 
+#include "backend.h"
+#include "defines.h"
+#include "config.h"
+
+#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
 static FILE *ueberzug = NULL;
+#endif
 extern unsigned int terminal_height;
 extern unsigned int terminal_width;
 char previewd;
@@ -43,14 +48,19 @@ char* preview_file(char *file_name, unsigned long file_size){
 
 
 	char *mime = get_mimetype(file_name);
+
+	#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
 	images_clear();
+	#endif
 
 	if (strstr(mime, "text")) {
 		file_buffer = text(file_name, &file_size);
+	#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
 	} else if (strstr(mime, "image")) {
 		file_buffer = generic(file_name);
 		images_print(file_name);
 		previewd = 1;
+	#endif
 	} else  {
 		file_buffer = generic(file_name);
 	}
@@ -74,28 +84,6 @@ char* text(char *path, unsigned long *file_size){
 		return "failed reading file";
 	}
 }
-void images_clear() {
-	if (previewd == 1) {
-		fprintf(ueberzug, "{\"action\": \"remove\",  \
-				\"identifier\": \"preview\"}\n");
-		fflush(ueberzug);
-		previewd = 0;
-	}
-}
-void images_print(char *file_name) {
-	char *path=getcwd(NULL, 0);
-	fprintf(ueberzug, "{\"action\": \"remove\",  \
-			\"identifier\": \"preview\"}\n");
-	fprintf(ueberzug, "{\"action\":\"add\", \
-			\"identifier\":\"preview\", \
-			\"max_height\":%d, \
-			\"max_width\":%d, \
-			\"y\":0, \
-			\"x\":%d, \
-			\"path\":\"%s/%s\"}\n", terminal_height, terminal_width/2, terminal_width/2, path, file_name);
-	fflush(ueberzug);
-	free(path);
-}
 char* generic(char *path){
 	char *cmd = concat("file ./\"", path);
 	cmd = concat(cmd, "\"");
@@ -111,6 +99,34 @@ char* generic(char *path){
 		return "failed executing shell command \"file\"";
 	}
 }
-void ueberzug_init(){
+#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
-	ueberzug = popen("ueberzug layer -s ", "w");
+void images_clear() {
+	if (previewd == 1) {
+		fprintf(ueberzug, "{\"action\": \"remove\",  \
+				\"identifier\": \"preview\"}\n");
+		fflush(ueberzug);
+		previewd = 0;
+	}
 }
+void images_print(char *file_name) {
+	char *path=getcwd(NULL, 0);
+
+	fprintf(ueberzug, "{\"action\":\"add\", \
+			\"identifier\":\"preview\", \
+			\"max_height\":%d, \
+			\"max_width\":%d, \
+			\"y\":0, \
+			\"x\":%d, \
+			\"path\":\"%s/%s\"}\n", terminal_height, terminal_width/2, terminal_width/2, path, file_name);
+	fflush(ueberzug);
+	free(path);
+}
+void ueberzug_init(){
+
+	#if SETTINGS_UEBERZUG_IMAGE_PREVIEW == 2
+	ueberzug = popen("ueberzug layer -s ", "w");
+	#elif SETTINGS_UEBERZUG_IMAGE_PREVIEW == 1
+	ueberzug = popen("ueberzug layer -s --no-cache ", "w");
+	#endif
+}
+#endif

main.c

@@ -183,8 +183,10 @@ void init() {
 
 	threading_init(); /* found in threading.c */
 	colors_init(); /* in colors.c */
-	ueberzug_init(); /* in file_previews.c */
 	dir_init();	/*in dir.c */
+	#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
+	ueberzug_init(); /* in file_previews.c */
+	#endif
 
 	ESCDELAY = 10;
 	char *start_path = getcwd(NULL, 0);

threading.c

@@ -157,7 +157,6 @@ void *thread_rgt(){
 
 		if (mid_content[selected_file_current].permissions & S_IRUSR) {
 			if (file_current.file_type == FILE_TYPE_DIR || file_current.file_type == FILE_TYPE_SYMLINK) {
-				images_clear();
 
 				unsigned long i = 0;
 				for (i = 0; i < rgt_file_count; i++) {