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); }
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); }
/* * 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); }