diff options
Diffstat (limited to 'sys/dev/vt/vt_buf.c')
-rw-r--r-- | sys/dev/vt/vt_buf.c | 84 |
1 files changed, 39 insertions, 45 deletions
diff --git a/sys/dev/vt/vt_buf.c b/sys/dev/vt/vt_buf.c index 443faeef63fd..ae6251a59eeb 100644 --- a/sys/dev/vt/vt_buf.c +++ b/sys/dev/vt/vt_buf.c @@ -134,11 +134,10 @@ 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; } @@ -460,7 +459,7 @@ 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; @@ -474,9 +473,9 @@ 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); @@ -495,7 +494,8 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size) 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; @@ -504,20 +504,16 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size) 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 @@ -551,18 +547,29 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size) } /* 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. */ @@ -575,15 +582,13 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size) * 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)); @@ -598,23 +603,13 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size) } } - 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) @@ -628,7 +623,6 @@ vtbuf_grow(struct vt_buf *vb, const term_pos_t *p, unsigned int history_size) /* 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. */ |