added image previews using ueberzug

file_previews.c

@@ -3,8 +3,14 @@
 #include <string.h>
 #include "defines.h"
 
+static FILE *ueberzug = NULL;
+extern unsigned int terminal_height;
+extern unsigned int terminal_width;
+char previewd;
 
 char* text(char *path, unsigned long *file_size);
+void images_print(char *file_name);
+void images_clear();
 char* generic(char *path);
 
 char* get_mimetype(char *path){
@@ -43,6 +49,14 @@ char* preview_file(char *file_name, unsigned long file_size){
 	} else {
 		file_buffer = generic(file_name);
 	}
+
+	if (strstr(mime, "image")) {
+		images_print(file_name);
+		previewd = 1;
+	} else {
+		images_clear();
+	}
+
 	free(mime);
 	return file_buffer;
 
@@ -58,6 +72,28 @@ 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, "\"");
@@ -73,3 +109,6 @@ char* generic(char *path){
 		return "failed executing shell command \"file\"";
 	}
 }
+void ueberzug_init(){
+	ueberzug = popen("ueberzug layer -s ", "w");
+}

file_previews.h

@@ -1,5 +1,10 @@
-#include "file_previews.c"
 #include "defines.h"
+#ifndef PREVIEW_GUARD
+#define PREVIEW_GUARD
+#include "file_previews.c"
+#endif
 
 char* preview_file(char *file_name, unsigned long file_size);
 char* get_mimetype(char *path);
+void images_clear();
+void ueberzug_init();

main.c

@@ -10,6 +10,7 @@
 #include "defines.h"
 #include "colors.h"
 #include "interactions.h"
+#include "file_previews.h"
 
 unsigned int terminal_height;
 unsigned int terminal_width;
@@ -188,7 +189,9 @@ void init() {
 	}
 
 	threading_init(); /* found in threading.c */
-	colors_init();
+	colors_init(); /* in colors.c */
+	ueberzug_init(); /* in file_previews.c */
+
 	ESCDELAY = 10;
 	char *start_path = getcwd(NULL, 0);
 	setenv("START_PATH", start_path, 0);

threading.c

@@ -180,6 +180,7 @@ void *thread_rgt(void *data){
 	pthread_mutex_unlock(&mutex_selection);
 
 	if (file_current_type == FILE_TYPE_DIR || file_current_type == FILE_TYPE_SYMLINK) {
+		images_clear();
 
 		unsigned long i = 0;
 		for (i = 0; i < rgt_file_count; i++) {