pound: keep track whether the buffer is "dirty"

ivop · Sep 10, 2024 · d533345 · d533345
1 parent c02f314
commit d533345
Showing 1 changed file with 21 additions and 9 deletions.
diff --git a/apps/pound.c b/apps/pound.c
@@ -27,6 +27,7 @@ struct editorConfig {
     unsigned int numrows;
     unsigned int rowsroom;
     struct erow *row;
+    bool dirty;
 } E;
 
 #define STYLE_NORMAL 0
@@ -143,7 +144,7 @@ void editorSave(void) {
     if (cpm_open_file(&cpm_fcb)) {
         editorDrawStatusMsg("Saving to new file...");
         if (write_file(&cpm_fcb)) editorDrawStatusMsg("Failed to save file");
-        return;
+        goto success;
     }
 
     editorDrawStatusMsg("Saving to temporary file...");
@@ -169,7 +170,9 @@ void editorSave(void) {
         return;
     }
 
+success:
     editorDrawStatusMsg("File saved");
+    E.dirty = false;
 }
 
 char line[256];
@@ -231,22 +234,23 @@ void editorScroll() {
     }
 }
 
+static const char *const dirty_string = " (modified)";
+
 void editorDrawStatusBar() {
-    uint8_t x, p;
+    uint8_t x, y, p;
     screen_setcursor(0, E.screenrows);
     screen_setstyle(STYLE_REVERSE);
-    x = p = 0;
+    p = 0;
     while (p<11) {
         if (cpm_fcb.f[p] != ' ') {
             screen_putchar(cpm_fcb.f[p]);
-            x++;
         }
         p++;
-        if (p == 8) {
-            screen_putchar('.');
-            x++;
-        }
+        if (p == 8) screen_putchar('.');
     }
+    for (p = 0; E.dirty && p<strlen(dirty_string); p++)
+        screen_putchar(dirty_string[p]);
+    screen_getcursor(&x, &y);
     for ( ; x<E.screencols; x++)
         screen_putchar(' ');
     screen_setstyle(STYLE_NORMAL);
@@ -336,6 +340,7 @@ void editorProcessKeypress(void) {
         case 'S':
         case CTRL('S'):             // ^KS Save
             editorSave();
+            editorDrawStatusBar();
             break;
         }
         ctrlk = false;
@@ -399,7 +404,13 @@ void editorProcessKeypress(void) {
         ctrlq = true;
         break;
     default:
-        if (c >= ' ' && c <= '~') editorInsertChar(c);
+        if (c >= ' ' && c <= '~') {
+            editorInsertChar(c);
+            if (!E.dirty) {
+                E.dirty = true;
+                editorDrawStatusBar();
+            }
+        }
         break;
     }
 }
@@ -419,6 +430,7 @@ void initEditor(void) {
     E.screenrows--;   // two lines for status bar and status message
     E.cx = E.cy = E.rowoff = E.coloff = E.numrows = E.rowsroom = 0;
     E.row = NULL;
+    E.dirty = false;
 }
 
 // -------------------- MAIN --------------------