Author: eadler
Date: Thu Mar 8 07:57:26 2018
New Revision: 330641
URL: https://svnweb.freebsd.org/changeset/base/330641
Log:
MFC r326599:
Implement "vidcontrol -h <history_size>" for vt(4)
PR: 210415
Modified:
stable/11/sys/dev/vt/vt.h
stable/11/sys/dev/vt/vt_buf.c
stable/11/sys/dev/vt/vt_core.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/dev/vt/vt.h
==============================================================================
--- stable/11/sys/dev/vt/vt.h Thu Mar 8 07:55:03 2018 (r330640)
+++ stable/11/sys/dev/vt/vt.h Thu Mar 8 07:57:26 2018 (r330641)
@@ -194,8 +194,8 @@ struct vt_buf {
#define VBF_SCROLL 0x8 /* scroll locked mode. */
#define VBF_HISTORY_FULL 0x10 /* All rows filled. */
unsigned int vb_history_size;
- int vb_roffset; /* (b) History rows offset. */
- int vb_curroffset; /* (b) Saved rows offset. */
+ unsigned int vb_roffset; /* (b) History rows offset. */
+ unsigned int vb_curroffset; /* (b) Saved rows offset. */
term_pos_t vb_cursor; /* (u) Cursor position. */
term_pos_t vb_mark_start; /* (b) Copy region start. */
term_pos_t vb_mark_end; /* (b) Copy region end. */
@@ -221,7 +221,7 @@ void vtbuf_cursor_position(struct vt_buf *, const term
void vtbuf_scroll_mode(struct vt_buf *vb, int yes);
void vtbuf_dirty(struct vt_buf *vb, const term_rect_t *area);
void vtbuf_undirty(struct vt_buf *, term_rect_t *);
-void vtbuf_sethistory_size(struct vt_buf *, int);
+void vtbuf_sethistory_size(struct vt_buf *, unsigned int);
int vtbuf_iscursor(const struct vt_buf *vb, int row, int col);
void vtbuf_cursor_visibility(struct vt_buf *, int);
#ifndef SC_NO_CUTPASTE
Modified: stable/11/sys/dev/vt/vt_buf.c
==============================================================================
--- stable/11/sys/dev/vt/vt_buf.c Thu Mar 8 07:55:03 2018
(r330640)
+++ stable/11/sys/dev/vt/vt_buf.c Thu Mar 8 07:57:26 2018
(r330641)
@@ -132,11 +132,10 @@ vthistory_addlines(struct vt_buf *vb, int offset)
#endif
vb->vb_curroffset += offset;
- if (vb->vb_curroffset < 0)
- vb->vb_curroffset = 0;
- if (vb->vb_curroffset + vb->vb_scr_size.tp_row >= vb->vb_history_size)
+ if (vb->vb_curroffset + vb->vb_scr_size.tp_row >= vb->vb_history_size) {
vb->vb_flags |= VBF_HISTORY_FULL;
- vb->vb_curroffset %= vb->vb_history_size;
+ vb->vb_curroffset %= vb->vb_history_size;
+ }
if ((vb->vb_flags & VBF_SCROLL) == 0) {
vb->vb_roffset = vb->vb_curroffset;
}
@@ -458,7 +457,7 @@ vtbuf_init(struct vt_buf *vb, const term_pos_t *p)
}
void
-vtbuf_sethistory_size(struct vt_buf *vb, int size)
+vtbuf_sethistory_size(struct vt_buf *vb, unsigned int size)
{
term_pos_t p;
@@ -472,9 +471,9 @@ void
vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size)
{
term_char_t *old, *new, **rows, **oldrows, **copyrows, *row, *oldrow;
- int bufsize, rowssize, w, h, c, r, history_was_full;
- unsigned int old_history_size;
- term_rect_t rect;
+ unsigned int w, h, c, r, old_history_size;
+ size_t bufsize, rowssize;
+ int history_full;
history_size = MAX(history_size, p->tp_row);
@@ -493,7 +492,8 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, uns
w = vb->vb_scr_size.tp_col;
h = vb->vb_scr_size.tp_row;
old_history_size = vb->vb_history_size;
- history_was_full = vb->vb_flags & VBF_HISTORY_FULL;
+ history_full = vb->vb_flags & VBF_HISTORY_FULL ||
+ vb->vb_curroffset + h >= history_size;
vb->vb_history_size = history_size;
vb->vb_buffer = new;
@@ -502,20 +502,16 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, uns
vb->vb_scr_size = *p;
vtbuf_init_rows(vb);
- /* Copy history and fill extra space if needed. */
+ /*
+ * Copy rows to the new buffer. The first row in the history
+ * is back to index 0, ie. the new buffer doesn't cycle.
+ */
if (history_size > old_history_size) {
- /*
- * Copy rows to the new buffer. The first row in the history
- * is back to index 0, ie. the new buffer doesn't cycle.
- *
- * The rest of the new buffer is initialized with blank
- * content.
- */
for (r = 0; r < old_history_size; r ++) {
row = rows[r];
/* Compute the corresponding row in the old buffer. */
- if (history_was_full)
+ if (history_full)
/*
* The buffer is full, the "top" row is
* the one just after the viewable area
@@ -549,18 +545,29 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, uns
}
/* Fill remaining rows. */
- rect.tr_begin.tp_col = 0;
- rect.tr_begin.tp_row = old_history_size;
- rect.tr_end.tp_col = p->tp_col;
- rect.tr_end.tp_row = p->tp_row;
- vtbuf_fill(vb, &rect, VTBUF_SPACE_CHAR(TERMINAL_NORM_ATTR));
+ for (r = old_history_size; r < history_size; r++) {
+ row = rows[r];
+ for (c = MIN(p->tp_col, w); c < p->tp_col; c++) {
+ row[c] = VTBUF_SPACE_CHAR(TERMINAL_NORM_ATTR);
+ }
+ }
vb->vb_flags &= ~VBF_HISTORY_FULL;
- } else {
+
/*
- * Copy rows to the new buffer. The first row in the history
- * is back to index 0, ie. the new buffer doesn't cycle.
+ * If the screen is already filled (there are non-visible lines
+ * above the current viewable area), adjust curroffset to the
+ * new viewable area.
*
+ * If the old buffer was full, set curroffset to the
+ * <h>th most recent line of history in the new, non-cycled
+ * buffer. Otherwise, it didn't cycle, so the old curroffset
+ * is the same in the new buffer.
+ */
+ if (history_full)
+ vb->vb_curroffset = old_history_size - h;
+ } else {
+ /*
* (old_history_size - history_size) lines of history are
* dropped.
*/
@@ -573,15 +580,13 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, uns
* See the equivalent if{} block above for an
* explanation.
*/
- if (history_was_full)
+ if (history_full)
oldrow = copyrows[
(vb->vb_curroffset + h + r +
(old_history_size - history_size)) %
old_history_size];
else
- oldrow = copyrows[
- (r + (old_history_size - history_size)) %
- old_history_size];
+ oldrow = copyrows[r];
memmove(row, oldrow,
MIN(p->tp_col, w) * sizeof(term_char_t));
@@ -596,23 +601,13 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, uns
}
}
- if (!history_was_full &&
- (vb->vb_curroffset + h) >= history_size)
+ if (history_full) {
+ vb->vb_curroffset = history_size - h;
vb->vb_flags |= VBF_HISTORY_FULL;
+ }
}
- /*
- * If the screen is already filled (there are non-visible lines
- * above the current viewable area), adjust curroffset to the
- * new viewable area.
- */
- if (!history_was_full && vb->vb_curroffset > 0) {
- vb->vb_curroffset = vb->vb_curroffset + h - p->tp_row;
- if (vb->vb_curroffset < 0)
- vb->vb_curroffset += vb->vb_history_size;
- vb->vb_curroffset %= vb->vb_history_size;
- vb->vb_roffset = vb->vb_curroffset;
- }
+ vb->vb_roffset = vb->vb_curroffset;
/* Adjust cursor position. */
if (vb->vb_cursor.tp_col > p->tp_col - 1)
@@ -626,7 +621,6 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, uns
/* Move cursor to the last line on the screen. */
vb->vb_cursor.tp_row = p->tp_row - 1;
- vtbuf_make_undirty(vb);
VTBUF_UNLOCK(vb);
/* Deallocate old buffer. */
Modified: stable/11/sys/dev/vt/vt_core.c
==============================================================================
--- stable/11/sys/dev/vt/vt_core.c Thu Mar 8 07:55:03 2018
(r330640)
+++ stable/11/sys/dev/vt/vt_core.c Thu Mar 8 07:57:26 2018
(r330641)
@@ -2207,6 +2207,13 @@ skip_thunk:
case CONS_BLANKTIME:
/* XXX */
return (0);
+ case CONS_HISTORY:
+ if (*(int *)data < 0)
+ return EINVAL;
+ if (*(int *)data != vd->vd_curwindow->vw_buf.vb_history_size)
+ vtbuf_sethistory_size(&vd->vd_curwindow->vw_buf,
+ *(int *)data);
+ return 0;
case CONS_GET:
/* XXX */
*(int *)data = M_CG640x480;
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