nhyatt/putty-source
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Right, I think we now hove scrolling optimisations. They should probably be

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conditional on something, but I can't be bothered right now.

[originally from svn r67]
This commit is contained in:
Ben Harris 1999-03-02 21:51:55 +00:00
parent 0ce1d562c6
commit 2145f64798
3 changed files with 47 additions and 3 deletions
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22
macterm.c
View File

@ -1,4 +1,4 @@
/* $Id: macterm.c,v 1.1.2.11 1999/03/02 14:52:35 ben Exp $ */
/* $Id: macterm.c,v 1.1.2.12 1999/03/02 21:51:55 ben Exp $ */
/*
* Copyright (c) 1999 Ben Harris
* All rights reserved.
@ -494,3 +494,23 @@ void optimised_move(int to, int from, int lines) {
InvalRgn(update); /* XXX: necessary? probably harmless anyway */
DisposeRgn(update);
}
/*
* Scroll the screen. (`lines' is +ve for scrolling forward, -ve
* for backward.)
*/
void do_scroll(int topline, int botline, int lines) {
struct mac_session *s = onlysession;
Rect r;
RgnHandle update;
SetPort(s->window);
update = NewRgn();
SetRect(&r, 0, topline * font_height,
cols * font_width, (botline + 1) * font_height);
ScrollRect(&r, 0, - lines * font_height, update);
/* XXX: move update region? */
InvalRgn(update);
DisposeRgn(update);
}

1
putty.h
View File

@ -196,6 +196,7 @@ void palette_reset (void);
void write_clip (void *, int);
void get_clip (void **, int *);
void optimised_move (int, int, int);
void do_scroll(int, int, int);
void fatalbox (const char *, ...);
void beep (void);
#define OPTIMISE_IS_SCROLL 1

27
terminal.c
View File

@ -97,6 +97,7 @@ static void erase_lots (int, int, int);
static void swap_screen (int);
static void update_sbar (void);
static void deselect (void);
static void scroll_display(int, int, int);
/*
* Set up power-on settings for the terminal.
@ -400,10 +401,30 @@ static void scroll (int topline, int botline, int lines, int sb) {
selend = scroll_top + size + scroll_size;
}
}
scroll_heuristic += lines;
scroll_display(topline, botline, lines);
}
static void scroll_display(int topline, int botline, int lines) {
unsigned long *start, *end;
int distance, size, i;
start = disptext + topline * (cols + 1);
end = disptext + (botline + 1) * (cols + 1);
distance = (lines > 0 ? lines : -lines) * (cols + 1);
size = end - start - distance;
if (lines > 0) {
memmove(start, start + distance, size * TSIZE);
for (i = 0; i < distance; i++)
(start + size)[i] |= ATTR_INVALID;
} else {
memmove(start + distance, start, size * TSIZE);
for (i = 0; i < distance; i++)
start[i] |= ATTR_INVALID;
}
do_scroll(topline, botline, lines);
}
/*
* Move the cursor to a given position, clipping at boundaries. We
* may or may not want to clip at the scroll margin: marg_clip is 0
@ -1282,6 +1303,8 @@ void term_scroll (int rel, int where) {
if (disptop > scrtop)
disptop = scrtop;
update_sbar();
if (rel == 0 && where < rows && where > -rows)
scroll_display(0, rows - 1, where);
term_update();
}