void
WindowScroll(XtermWidget xw, int top, Bool always GCC_UNUSED)
{
TScreen *screen = TScreenOf(xw);
#if OPT_SCROLL_LOCK
if (screen->allowScrollLock && (screen->scroll_lock && !always)) {
if (screen->scroll_dirty) {
screen->scroll_dirty = False;
ScrnRefresh(xw, 0, 0, MaxRows(screen), MaxCols(screen), False);
}
} else
#endif
{
int i;
if (top < -screen->savedlines) {
top = -screen->savedlines;
} else if (top > 0) {
top = 0;
}
if ((i = screen->topline - top) != 0) {
int lines;
int scrolltop, scrollheight, refreshtop;
if (screen->cursor_state)
HideCursor();
lines = i > 0 ? i : -i;
if (lines > MaxRows(screen))
lines = MaxRows(screen);
scrollheight = screen->max_row - lines + 1;
if (i > 0)
refreshtop = scrolltop = 0;
else {
scrolltop = lines;
refreshtop = scrollheight;
}
scrolling_copy_area(xw, scrolltop, scrollheight, -i);
screen->topline = top;
ScrollSelection(screen, i, True);
xtermClear2(xw,
OriginX(screen),
OriginY(screen) + refreshtop * FontHeight(screen),
(unsigned) Width(screen),
(unsigned) (lines * FontHeight(screen)));
ScrnRefresh(xw, refreshtop, 0, lines, MaxCols(screen), False);
#if OPT_BLINK_CURS || OPT_BLINK_TEXT
RestartBlinking(screen);
#endif
}
}
ScrollBarDrawThumb(screen->scrollWidget);
}
static void
repaint_line(unsigned newChrSet)
{
register TScreen *screen = &term->screen;
int curcol = screen->cur_col;
int len = screen->max_col + 1;
int width = len;
TRACE(("repaint_line(%2d,%2d) (%d)\n", screen->cur_row, screen->cur_col, newChrSet))
/* If switching from single-width, keep the cursor in the visible part
* of the line.
*/
if (CSET_DOUBLE(newChrSet)) {
width /= 2;
if (curcol > width)
curcol = width;
}
/* FIXME: do VT220 softchars allow double-sizes? */
memset(SCRN_BUF_CSETS(screen, screen->cur_row), newChrSet, len);
screen->cur_col = 0;
ScrnRefresh (screen, screen->cur_row, 0, 1, len, True);
screen->cur_col = curcol;
}
void WindowScroll(TScreen *screen,int top)
{
register int i, lines;
register int scrolltop, scrollheight, refreshtop;
register int x = 0;
if (top < -screen->savedlines)
top = -screen->savedlines;
else if (top > 0)
top = 0;
if((i = screen->topline - top) == 0)
{
ScrollBarDrawThumb(screen->scrollWidget);
return;
}
/*ScrollSelection(screen, i);*/
if(screen->cursor_state)
HideCursor();
lines = i > 0 ? i : -i;
if(lines > screen->max_row + 1)
lines = screen->max_row + 1;
scrollheight = screen->max_row - lines + 1;
if(i > 0)
refreshtop = scrolltop = 0;
else
{
scrolltop = lines;
refreshtop = scrollheight;
}
/*x = screen->scrollbar + screen->border;*/
x=OriginX(screen);
scrolling_copy_area(screen, scrolltop, scrollheight, -i);
screen->topline = top;
ScrollSelection(screen, i);
XClearArea(
screen->display,
/*TextWindow(screen),*/
VWindow(screen),
(int) x,
(int) refreshtop * FontHeight(screen) + screen->border,
(unsigned) Width(screen),
(unsigned) lines * FontHeight(screen),
FALSE);
ScrnRefresh(screen, refreshtop, 0, lines, screen->max_col + 1, False);
ScrollBarDrawThumb(screen->scrollWidget);
}
/*
* After writing text to the screen, resolve mismatch between the current
* location and any attributes that would have been set by preceding locations.
*/
void Resolve_XMC(register TScreen *screen)
{
Boolean changed = False;
Char start;
Char my_attrs = (screen->xmc_attributes & XMC_FLAGS);
int row = screen->cur_row;
int col = screen->cur_col;
/* Find the preceding cell.
*/
if (getXtermCell(screen, row, col) != XMC_GLITCH) {
if (col != 0) {
col--;
} else if (!screen->xmc_inline && row != 0) {
row--;
col = CurMaxCol(screen, row);
}
}
start = (SCRN_BUF_ATTRS(screen, row)[col] & my_attrs);
/* Now propagate the starting state until we reach a cell which holds
* a glitch.
*/
for (;;) {
if (col < CurMaxCol(screen, row)) {
col++;
} else if (!screen->xmc_inline && row < screen->max_row) {
row++;
col = 0;
} else
break;
if (getXtermCell(screen, row, col) == XMC_GLITCH)
break;
if ((SCRN_BUF_ATTRS(screen, row)[col] & my_attrs) != start) {
SCRN_BUF_ATTRS(screen, row)[col] = start |
(SCRN_BUF_ATTRS(screen, row)[col] & ~my_attrs);
changed = True;
}
}
TRACE(("XMC %s (%s:%d/%d) from %d,%d to %d,%d\n",
changed ? "Ripple" : "Nochange",
term->flags & my_attrs ? "on" : "off",
my_attrs, start,
screen->cur_row, screen->cur_col, row, col));
if (changed) {
ScrnRefresh (screen, screen->cur_row, 0, row + 1 - screen->cur_row, screen->max_col + 1, True);
}
}
static void
repaint_line(unsigned newChrSet)
{
register TScreen *screen = &term->screen;
int curcol = screen->cur_col;
int currow = screen->cur_row;
int len = screen->max_col + 1;
int width = len;
unsigned oldChrSet = SCRN_BUF_CSETS(screen, currow)[0];
/*
* Ignore repetition.
*/
if (oldChrSet == newChrSet)
return;
TRACE(("repaint_line(%2d,%2d) (%d)\n", currow, screen->cur_col, newChrSet));
HideCursor();
/* If switching from single-width, keep the cursor in the visible part
* of the line.
*/
if (CSET_DOUBLE(newChrSet)) {
width /= 2;
if (curcol > width)
curcol = width;
}
/*
* ScrnRefresh won't paint blanks for us if we're switching between a
* single-size and double-size font.
*/
if (CSET_DOUBLE(oldChrSet) != CSET_DOUBLE(newChrSet)) {
ClearCurBackground(
screen,
CursorY(screen, currow),
CurCursorX(screen, currow, 0),
FontHeight(screen),
len * CurFontWidth(screen, currow));
}
/* FIXME: do VT220 softchars allow double-sizes? */
memset(SCRN_BUF_CSETS(screen, currow), newChrSet, len);
screen->cur_col = 0;
ScrnRefresh(screen, currow, 0, 1, len, True);
screen->cur_col = curcol;
}
/*
* These routines are used for the jump scroll feature
*/
void
FlushScroll(register TScreen *screen)
{
register int i;
register int shift = -screen->topline;
register int bot = screen->max_row - shift;
register int refreshtop;
register int refreshheight;
register int scrolltop;
register int scrollheight;
if(screen->cursor_state)
HideCursor();
if(screen->scroll_amt > 0) {
refreshheight = screen->refresh_amt;
scrollheight = screen->bot_marg - screen->top_marg -
refreshheight + 1;
if((refreshtop = screen->bot_marg - refreshheight + 1 + shift) >
(i = screen->max_row - screen->scroll_amt + 1))
refreshtop = i;
if(screen->scrollWidget && !screen->alternate
&& screen->top_marg == 0) {
scrolltop = 0;
if((scrollheight += shift) > i)
scrollheight = i;
if((i = screen->bot_marg - bot) > 0 &&
(refreshheight -= i) < screen->scroll_amt)
refreshheight = screen->scroll_amt;
if((i = screen->savedlines) < screen->savelines) {
if((i += screen->scroll_amt) >
screen->savelines)
i = screen->savelines;
screen->savedlines = i;
ScrollBarDrawThumb(screen->scrollWidget);
}
} else {
scrolltop = screen->top_marg + shift;
if((i = bot - (screen->bot_marg - screen->refresh_amt +
screen->scroll_amt)) > 0) {
if(bot < screen->bot_marg)
refreshheight = screen->scroll_amt + i;
} else {
scrollheight += i;
refreshheight = screen->scroll_amt;
if((i = screen->top_marg + screen->scroll_amt -
1 - bot) > 0) {
refreshtop += i;
refreshheight -= i;
}
}
}
} else {
refreshheight = -screen->refresh_amt;
scrollheight = screen->bot_marg - screen->top_marg -
refreshheight + 1;
refreshtop = screen->top_marg + shift;
scrolltop = refreshtop + refreshheight;
if((i = screen->bot_marg - bot) > 0)
scrollheight -= i;
if((i = screen->top_marg + refreshheight - 1 - bot) > 0)
refreshheight -= i;
}
scrolling_copy_area(screen, scrolltop+screen->scroll_amt,
scrollheight, screen->scroll_amt);
ScrollSelection(screen, -(screen->scroll_amt));
screen->scroll_amt = 0;
screen->refresh_amt = 0;
if(refreshheight > 0) {
ClearCurBackground(screen,
(int) refreshtop * FontHeight(screen) + screen->border,
(int) OriginX(screen),
(unsigned) refreshheight * FontHeight(screen),
(unsigned) Width(screen));
ScrnRefresh(screen, refreshtop, 0, refreshheight,
screen->max_col + 1, False);
}
}
/*
* scrolls the screen by amount lines, erases bottom, doesn't alter
* cursor position (i.e. cursor moves down amount relative to text).
* All done within the scrolling region, of course.
* requires: amount > 0
*/
void
Scroll(register TScreen *screen, register int amount)
{
register int i = screen->bot_marg - screen->top_marg + 1;
register int shift;
register int bot;
register int refreshtop = 0;
register int refreshheight;
register int scrolltop;
register int scrollheight;
if(screen->cursor_state)
HideCursor();
if (amount > i)
amount = i;
if(screen->jumpscroll) {
if(screen->scroll_amt > 0) {
if(screen->refresh_amt + amount > i)
FlushScroll(screen);
screen->scroll_amt += amount;
screen->refresh_amt += amount;
} else {
if(screen->scroll_amt < 0)
FlushScroll(screen);
screen->scroll_amt = amount;
screen->refresh_amt = amount;
}
refreshheight = 0;
} else {
ScrollSelection(screen, -(amount));
if (amount == i) {
ClearScreen(screen);
return;
}
shift = -screen->topline;
bot = screen->max_row - shift;
scrollheight = i - amount;
refreshheight = amount;
if((refreshtop = screen->bot_marg - refreshheight + 1 + shift) >
(i = screen->max_row - refreshheight + 1))
refreshtop = i;
if(screen->scrollWidget && !screen->alternate
&& screen->top_marg == 0) {
scrolltop = 0;
if((scrollheight += shift) > i)
scrollheight = i;
if((i = screen->savedlines) < screen->savelines) {
if((i += amount) > screen->savelines)
i = screen->savelines;
screen->savedlines = i;
ScrollBarDrawThumb(screen->scrollWidget);
}
} else {
scrolltop = screen->top_marg + shift;
if((i = screen->bot_marg - bot) > 0) {
scrollheight -= i;
if((i = screen->top_marg + amount - 1 - bot) >= 0) {
refreshtop += i;
refreshheight -= i;
}
}
}
if (screen->multiscroll && amount == 1 &&
screen->topline == 0 && screen->top_marg == 0 &&
screen->bot_marg == screen->max_row) {
if (screen->incopy < 0 && screen->scrolls == 0)
CopyWait(screen);
screen->scrolls++;
}
scrolling_copy_area(screen, scrolltop+amount, scrollheight, amount);
if(refreshheight > 0) {
ClearCurBackground(screen,
(int) refreshtop * FontHeight(screen) + screen->border,
(int) OriginX(screen),
(unsigned) refreshheight * FontHeight(screen),
(unsigned) Width(screen));
if(refreshheight > shift)
refreshheight = shift;
}
}
if(screen->scrollWidget && !screen->alternate && screen->top_marg == 0)
ScrnDeleteLine(screen, screen->allbuf,
screen->bot_marg + screen->savelines, 0,
amount, screen->max_col + 1);
else
ScrnDeleteLine(screen, screen->visbuf,
screen->bot_marg, screen->top_marg,
amount, screen->max_col + 1);
if(refreshheight > 0)
ScrnRefresh(screen, refreshtop, 0, refreshheight,
screen->max_col + 1, False);
}
