vtgl

Commit: d0b56d0ef05ffacb89c5439d55d5cac2ee29d328
Parent: 9f07a3c8ab0721beb511b6f28186481a901cfdce
Author: Randy Palamar
Date:   Fri, 23 Aug 2024 22:31:59 -0600

allow selection to scroll with framebuffer

Diffstat:
M
terminal.c
 | 
29
+++++++++++++++++++++++++++++
M
vtgl.c
 | 
1
+

2 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/terminal.c b/terminal.c
@@ -116,6 +116,33 @@ feed_line(LineBuf *lb, u8 *position, CellStyle cursor_state)
 }
 
 static void
+selection_clear(Selection *s)
+{
+	s->range.end = INVALID_RANGE_END;
+	s->state     = SS_NONE;
+}
+
+static void
+selection_scroll(Term *t, u32 origin, i32 n)
+{
+	Selection *s = &t->selection;
+	if (!is_valid_range(s->range))
+		return;
+
+	b32 start_in_bounds = BETWEEN(s->range.start.y, origin, t->size.h - 1);
+	b32 end_in_bounds   = BETWEEN(s->range.end.y,   origin, t->size.h - 1);
+	if (start_in_bounds != end_in_bounds) {
+		selection_clear(s);
+	} else if (start_in_bounds) {
+		s->range.start.y += n;
+		s->range.end.y   += n;
+		if (s->range.start.y > t->size.h - 1 || s->range.start.y < 0 ||
+		    s->range.end.y   > t->size.h - 1 || s->range.end.y   < 0)
+			selection_clear(s);
+	}
+}
+
+static void
 fb_clear_region(Term *t, u32 r1, u32 r2, u32 c1, u32 c2)
 {
 	u32 tmp;
@@ -155,6 +182,7 @@ fb_scroll_down(Term *t, u32 top, u32 n)
 		tv->fb.rows[i]     = tv->fb.rows[i - n];
 		tv->fb.rows[i - n] = tmp;
 	}
+	selection_scroll(t, top, n);
 }
 
 static void
@@ -169,6 +197,7 @@ fb_scroll_up(Term *t, u32 top, u32 n)
 		tv->fb.rows[i]     = tv->fb.rows[i + n];
 		tv->fb.rows[i + n] = tmp;
 	}
+	selection_scroll(t, top, -n);
 }
 
 static void
diff --git a/vtgl.c b/vtgl.c
@@ -699,6 +699,7 @@ init_term(Term *t, Arena *a)
 		cursor_move_to(t, 0, 0);
 		cursor_alt(t, 1);
 	}
+	selection_clear(&t->selection);
 }
 
 DEBUG_EXPORT void