1 files changed, 42 insertions, 0 deletions
diff --git a/sys/cmd/dvtm/window.c b/sys/cmd/dvtm/window.c
new file mode 100644
index 0000000..44690c9
--- /dev/null
+++ b/sys/cmd/dvtm/window.c
@@ -0,0 +1,42 @@
+#include <u.h>
+#include <libn.h>
+
+#include "buffer.h"
+
+typedef struct Rect   Rect;
+typedef struct Window Window;
+
+/* origin upper left corner */
+struct Rect
+{
+    int r0, c0, rows, cols;
+};
+
+struct Window
+{
+    Buffer  buffer[2], *buf;
+    Rect    area;         /* on screen */
+    Pen     pen, spen;    /* current and saved pen */
+    struct {
+        uint visible : 1;
+        int  row, col;    /* saved cursor row/colmn (zero based) */
+        int  srow, scol;  /* saved cursor row/colmn (zero based) */
+    } c;
+}
+
+/* functions */
+
+Window *
+makewindow(
+
+	t->pen = (Pen) {
+        .state = PenNormal,
+        .col   = {-1, -1}, 
+    };
+	t->buffer = &t->buf[0];
+
+	if (!binit(&t->buf[0], rows, cols, size) ||
+	    !binit(&t->buf[1], rows, cols, 0)) {
+		free(t);
+		return nil;
+	}