CE edit modes

ce/edit.c

@@ -27,6 +27,9 @@
 
 struct edit_line {
   struct list_node_link lines_link;
+  struct list_node_link select_link;
+  size_t select_start;
+  size_t select_end;
   struct gapbuffer gb;
 };
 
@@ -35,6 +38,18 @@ struct cursor {
   size_t line;
 };
 
+#define EDIT_MODE_NORMAL  0
+#define EDIT_MODE_COMAMND 1
+
+static const char* string_modes[] = {
+    [EDIT_MODE_NORMAL] = "Normal",
+    [EDIT_MODE_COMAMND] = "Command",
+};
+
+struct edit_select {
+  struct list_node_link* lines;
+};
+
 struct editor {
   struct list_node_link* lines;
   struct edit_line* current_line;
@@ -42,6 +57,8 @@ struct editor {
   size_t col_offset;
   size_t row_offset;
   size_t total_lines;
+  struct edit_select select;
+  int mode;
 };
 
 static struct editor editor;
@@ -207,8 +224,9 @@ void edit_start (const char* file_path, const char* text) {
     bbptr += w;
     bb_remaining -= w;
 
-    w = snprintf (bbptr, bb_remaining, "  Editing %s; line %zu col %zu" ANSIQ_GR_RESET, file_path,
-                  editor.cursor.line + 1, editor.cursor.col + 1);
+    w = snprintf (bbptr, bb_remaining, "  Editing %s; line %zu col %zu; Mode: %s" ANSIQ_GR_RESET,
+                  file_path, editor.cursor.line + 1, editor.cursor.col + 1,
+                  string_modes[editor.mode]);
     bbptr += w;
     bb_remaining -= w;
 
@@ -225,20 +243,25 @@ void edit_start (const char* file_path, const char* text) {
 
     switch (ch) {
     case '\b':
+      if (editor.mode == EDIT_MODE_NORMAL) {
         if (editor.cursor.col > 0) {
           gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
           editor.cursor.col--;
           gapbuffer_backspace (&editor.current_line->gb);
         }
+      }
       break;
     case '\t':
+      if (editor.mode == EDIT_MODE_NORMAL) {
         gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
         for (size_t i = 0; i < sizeof (TAB_INSERT) - 1; i++)
           gapbuffer_insert (&wrealloc, NULL, &editor.current_line->gb, TAB_INSERT[i]);
 
         editor.cursor.col += sizeof (TAB_INSERT) - 1;
+      }
       break;
     case '\n': {
+      if (editor.mode == EDIT_MODE_NORMAL) {
         gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
 
         struct edit_line* new_line = malloc (sizeof (*new_line));
@@ -264,12 +287,15 @@ void edit_start (const char* file_path, const char* text) {
         editor.cursor.col = 0;
         editor.cursor.line++;
         editor.current_line = new_line;
+      }
     } break;
     case KB_DELETE:
+      if (editor.mode == EDIT_MODE_NORMAL) {
         if (editor.cursor.col < gapbuffer_length (&editor.current_line->gb)) {
           gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
           editor.current_line->gb.gap_end++;
         }
+      }
       break;
     case KB_LEFT:
       if (editor.cursor.col > 0)
@@ -305,15 +331,29 @@ void edit_start (const char* file_path, const char* text) {
     case KB_END:
       editor.cursor.col = gapbuffer_length (&editor.current_line->gb);
       break;
-    case KB_CTRL ('Q'):
-      edit_run = false;
+    case KB_ESCAPE:
+      editor.mode = EDIT_MODE_NORMAL;
       break;
+    case KB_CTRL ('X'):
+      editor.mode = EDIT_MODE_COMAMND;
     default:
       if (isprint (ch)) {
+        if (editor.mode == EDIT_MODE_COMAMND) {
+          switch (ch) {
+          case 'q':
+            edit_run = false;
+            editor.mode = EDIT_MODE_NORMAL;
+            break;
+          default:
+            editor.mode = EDIT_MODE_NORMAL;
+            break;
+          }
+        } else if (editor.mode == EDIT_MODE_NORMAL) {
           gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
           gapbuffer_insert (&wrealloc, NULL, &editor.current_line->gb, ch);
           editor.cursor.col++;
         }
+      }
       break;
     }
 

include/kb_defs.h

@@ -20,6 +20,7 @@
 #define KB_PAGEDN 0xe7
 #define KB_INSERT 0xe8
 #define KB_DELETE 0xe9
+#define KB_ESCAPE 0x1b
 
 #define KB_CTRL(x) ((x) - '@')