Add open file key-bind

src/builtins.c

@@ -124,5 +124,18 @@ Lisp editorMoveCursorPageDown(Lisp args, LispError* e, LispContext ctx) {
   return lisp_null();
 }
 
+Lisp editorOpenFile(Lisp args, LispError *e, LispContext ctx) {
+  char *filename = editorPrompt("Path : %s");
+  if (filename)
+    editorOpen(filename);
+
+  return lisp_null();
+}
 
 
+Lisp editorPrintC(Lisp args, LispError *e, LispContext ctx) {
+  char c = lisp_char(lisp_car(args));
+  editorInsertChar(c);
+  return lisp_null();
+}
+

src/editor_op.c

@@ -1,15 +1,16 @@
 #include "../include/editor_op.h"
 #include "../include/row_op.h"
-#include <stdio.h>
+#include "data.h"
+
 
 extern struct editorConfig E;
 
 void editorInsertChar(int c) {
-  if (E.cursor_y == E.numrows) {
-    editorInsertRow(E.numrows, "", 0);
-  }
-  editorRowInsertChar(&E.row[E.cursor_y], E.cursor_x, c);
-  E.cursor_x++;
+    if (E.cursor_y == E.numrows) {
+      editorInsertRow(E.numrows, "", 0);
+    }
+    editorRowInsertChar(&E.row[E.cursor_y], E.cursor_x, c);
+    E.cursor_x++;
 }
 
 void editorInsertNewLine() {

src/file_io.c

@@ -1,6 +1,7 @@
 #include "../include/file_io.h"
 #include "../include/input.h"
 #include "../include/output.h"
+#include "data.h"
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -36,16 +37,36 @@ char *editorRowsToString(int *buffer_len) {
   return buf;
 }
 
+void editorCloseFile(void) {
+  E.cursor_x = 0;
+  E.cursor_y = 0;
+  E.rx = 0;
+  E.row_offset = 0;
+  E.col_offset = 0;
+  E.numrows = 0;
+  E.row = NULL;
+  E.dirty = 0;
+  E.filename = NULL;
+  E.status_msg[0] = '\0';
+  E.status_msg_time = 0;
+
+}
+
 void editorOpen(char *filename) {
   FILE *fp;
 
+  // Test if a file is already open
+  if (E.filename != NULL) {
+    editorCloseFile();
+  }
+
   free(E.filename);
   E.filename = strdup(filename);
 
   fp = fopen(filename, "a+");
   if (!fp)
     die("fopen");
-
+  
   char *line = NULL;
   size_t line_cap = 0;
   ssize_t line_len;

src/init.c

@@ -29,6 +29,8 @@ void initBuiltins() {
   registerBuiltin("EDITOR-DELETE-PREVIOUS-CHAR", deletePreviousChar);
   registerBuiltin("MOVE-CURSOR-PAGE-UP", editorMoveCursorPageUp);
   registerBuiltin("MOVE-CURSOR-PAGE-DOWN", editorMoveCursorPageDown);
+  registerBuiltin("EDITOR-OPEN-FILE", editorOpenFile);
+  registerBuiltin("EDITOR-INSERT-CHAR", editorPrintC);
 }
 
 void initEditor() {
@@ -41,6 +43,7 @@ void initEditor() {
   E.row = NULL;
   E.dirty = 0;
   E.filename = NULL;
+  E.state = READ_ONLY;
   E.status_msg[0] = '\0';
   E.status_msg_time = 0;
   if (getWindowSize(&E.screenrows, &E.screencols) == -1) {

src/row_op.c

@@ -102,6 +102,8 @@ void editorDelRow(int at) {
  * \param at Index of where we want to insert the char */
 
 void editorRowInsertChar(erow *row, int at, int c) {
+  if (E.state == READ_ONLY)
+    return;
   if (at < 0 || at > row->size) {
     at = row->size;
   }