CE edit save/restore terminal state

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;
@@ -98,6 +115,8 @@ static size_t count_digits (size_t n) {
 }
 
 void edit_start (const char* file_path, const char* text) {
+  mprintf (ANSIQ_SCR_SAVE);
+
   prepare_lines (text);
   struct arena temp_arena;
   memset (&temp_arena, 0, sizeof (temp_arena));
@@ -105,7 +124,7 @@ void edit_start (const char* file_path, const char* text) {
 
   terminal_dimensions (&cols, &rows);
 
-  mprintf (ANSIQ_SCR_CLR_ALL ANSIQ_CUR_INVISIBLE);
+  mprintf (ANSIQ_CUR_INVISIBLE);
 
   bool edit_run = true;
 
@@ -207,8 +226,9 @@ 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;
 
@@ -225,50 +245,58 @@ void edit_start (const char* file_path, const char* text) {
 
     switch (ch) {
     case '\b':
-      if (editor.cursor.col > 0) {
-        gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
-        editor.cursor.col--;
-        gapbuffer_backspace (&editor.current_line->gb);
+      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':
-      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]);
+      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;
+        editor.cursor.col += sizeof (TAB_INSERT) - 1;
+      }
       break;
     case '\n': {
-      gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
+      if (editor.mode == EDIT_MODE_NORMAL) {
+        gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
 
-      struct edit_line* new_line = malloc (sizeof (*new_line));
-      memset (new_line, 0, sizeof (*new_line));
+        struct edit_line* new_line = malloc (sizeof (*new_line));
+        memset (new_line, 0, sizeof (*new_line));
 
-      char* tail = gapbuffer_string_at (&warena_malloc, &temp_arena, &editor.current_line->gb,
-                                        editor.cursor.col);
-      size_t tail_size = strlen (tail);
-      size_t init_cap = tail_size > 0 ? tail_size : 32;
+        char* tail = gapbuffer_string_at (&warena_malloc, &temp_arena, &editor.current_line->gb,
+                                          editor.cursor.col);
+        size_t tail_size = strlen (tail);
+        size_t init_cap = tail_size > 0 ? tail_size : 32;
 
-      gapbuffer_init (&wmalloc, NULL, &new_line->gb, init_cap);
+        gapbuffer_init (&wmalloc, NULL, &new_line->gb, init_cap);
 
-      if (tail_size > 0) {
-        memcpy (new_line->gb.buffer,
-                editor.current_line->gb.buffer + editor.current_line->gb.gap_end, tail_size);
-        new_line->gb.gap_start = tail_size;
+        if (tail_size > 0) {
+          memcpy (new_line->gb.buffer,
+                  editor.current_line->gb.buffer + editor.current_line->gb.gap_end, tail_size);
+          new_line->gb.gap_start = tail_size;
+        }
+
+        editor.current_line->gb.gap_end = editor.current_line->gb.size;
+
+        list_insert_after (editor.lines, &editor.current_line->lines_link, &new_line->lines_link);
+
+        editor.cursor.col = 0;
+        editor.cursor.line++;
+        editor.current_line = new_line;
       }
-
-      editor.current_line->gb.gap_end = editor.current_line->gb.size;
-
-      list_insert_after (editor.lines, &editor.current_line->lines_link, &new_line->lines_link);
-
-      editor.cursor.col = 0;
-      editor.cursor.line++;
-      editor.current_line = new_line;
     } break;
     case KB_DELETE:
-      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++;
+      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:
@@ -305,14 +333,28 @@ 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)) {
-        gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
-        gapbuffer_insert (&wrealloc, NULL, &editor.current_line->gb, ch);
-        editor.cursor.col++;
+        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;
     }
@@ -333,4 +375,5 @@ void edit_start (const char* file_path, const char* text) {
   }
 
   memset (&editor, 0, sizeof (editor));
+  mprintf (ANSIQ_SCR_RESTORE);
 }

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) - '@')
 

libterminal/tscreen.h

@@ -10,8 +10,8 @@
 #define ANSIQ_SCR_CLR2LEND ANSIQ_ESC"[0K" // Clear to end of line
 #define ANSIQ_SCR_CLR2LBEG ANSIQ_ESC"[1K" // Clear to begining of line
 #define ANSIQ_SCR_CLR_LINE ANSIQ_ESC"[2K" // Clear entire line
-#define ANSIQ_SCR_RESTORE  ANSIQ_ESC"[?47l"
-#define ANSIQ_SCR_SAVE     ANSIQ_ESC"[?47h"
+#define ANSIQ_SCR_RESTORE  ANSIQ_ESC"[?1049l"
+#define ANSIQ_SCR_SAVE     ANSIQ_ESC"[?1049h"
 /* clang-format on */
 
 #endif /* ANSIQ_SCREEN_H */