add path autocomplete

src/input.c

@@ -3,6 +3,8 @@
 #include "../include/output.h"
 #include "../include/define.h"
 #include <ctype.h>
+#include <sys/stat.h>
+#include <dirent.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -11,19 +13,67 @@
 
 extern struct editorConfig E;
 
+char * file_completion(const char *path) {
+	DIR * dir;
+	struct dirent *entry;
+	char directory[128];
+	char predict[128];
+	size_t predict_len;
+
+	// Find dir name
+	char * last_slash = strrchr(path, '/');
+	if (last_slash) {
+		size_t dir_len = last_slash - path + 1; // length of dir_path
+		strncpy(directory, path, dir_len);
+		predict_len = strlen(path) - dir_len - 1;
+		strncpy(predict, last_slash + 1, predict_len);
+		directory[dir_len] = '\0';
+		fprintf(stderr, "%s %s\n", directory, predict);
+		predict[predict_len] = '\0';
+	} else {
+		return NULL;
+	}
+
+  dir = opendir(directory);
+  if (!dir)
+  	return NULL;
+	
+	while ((entry = readdir(dir)) != NULL) {
+        if (strncmp(entry->d_name, predict, predict_len) == 0) {
+            static char full_path[128];
+            snprintf(full_path, sizeof(full_path), "%s%s", directory, entry->d_name);
+
+            struct stat st;
+            if (stat(full_path, &st) == 0 && S_ISDIR(st.st_mode)) {
+                strcat(full_path, "/"); // add slash for directories
+            }
+
+            return strdup(full_path);
+        }
+    }
+
+    // Cleanup when no more entries
+    closedir(dir);
+    dir = NULL;
+    return NULL;
+
+}
+
 /**
- * \fn char * editorPrompt(struct editorConfig *E, char *prompt)
+ * \fn char * editorPrompt(struct editorConfig *E, char *prompt, char bPathMode)
  * \brief Return user input in a prompt when enter is hit. */
 
-char *editorPrompt(char *prompt) {
+char *editorPrompt(char *prompt, char * placeHolder, char bPathMode) {
   size_t buf_size = 128;
   char *buf = malloc(buf_size);
   size_t buf_len = 0;
   int c = 0;
   buf[0] = '\0';
+	strcpy(buf, placeHolder);
+	buf_len = strlen(placeHolder);
 
   while (1) {
-    editorSetStatusMessage(prompt, buf);
+		editorSetStatusMessage(prompt, buf);
     editorRefreshScreen();
     c = editorReadKey();
     if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
@@ -39,6 +89,24 @@ char *editorPrompt(char *prompt) {
         editorSetStatusMessage("");
         return buf;
       }
+    } else if (bPathMode && c == '\t') {
+			char path[128];
+		  char * pwd;
+			if (buf[0] != '/') {
+				pwd = getenv("PWD");
+			  fprintf(stderr, "%s\n", pwd);
+			  memcpy(path, pwd, strlen(pwd));
+				path[strlen(pwd)] = '/';
+				strncat(path, buf, buf_len);
+			} else {
+				strcpy(path, buf);
+			}
+			memset(buf, 0, 128);
+			buf_len = 0;
+		  strcpy(buf, file_completion(path));
+			buf_len = strlen(buf);
+			buf[buf_len] = '\0';
+		  
     } else if (!iscntrl(c) && c < 128) {
       if (buf_len == buf_size - 1) {
         buf_size *= 2;