rxvtlib_screen.c

来自「具有IDE功能的编辑器」· C语言 代码 · 共 2,128 行 · 第 1/5 页

#else				/* drive with your eyes closed */
    MAX_IT (o->screen.cur.row, 0);
    MAX_IT (o->screen.cur.col, 0);
#endif
}

/* ------------------------------------------------------------------------- */
/*
 * Swap between primary and secondary screens
 * XTERM_SEQ: Primary screen  : ESC [ ? 4 7 h
 * XTERM_SEQ: Secondary screen: ESC [ ? 4 7 l
 */
/* EXTPROTO */
int             rxvtlib_scr_change_screen (rxvtlib *o, int scrn)
{
    int             i, tmp;

#if NSCREENS
    int             offset;
    text_t         *t0;
    rend_t         *r0;
    short         l0;
#endif

    o->want_refresh = 1;

    D_SCREEN ((stderr, "scr_change_screen(%d)", scrn));

    o->TermWin.view_start = 0;
    RESET_CHSTAT;

    if (o->current_screen == scrn)
	return o->current_screen;

    CHECK_SELECTION (2);	/* check for boundary cross */

    SWAP_IT (o->current_screen, scrn, tmp);
#if NSCREENS
    offset = o->TermWin.saveLines;
    for (i = o->TermWin.nrow; i--;) {
	SWAP_IT (o->screen.text[i + offset], o->swap.text[i], t0);
	SWAP_IT (o->screen.tlen[i + offset], o->swap.tlen[i], l0);
	SWAP_IT (o->screen.rend[i + offset], o->swap.rend[i], r0);
    }
    SWAP_IT (o->screen.cur.row, o->swap.cur.row, l0);
    SWAP_IT (o->screen.cur.col, o->swap.cur.col, l0);
# ifdef DEBUG_STRICT
    assert (o->screen.cur.row >= 0);
    assert (o->screen.cur.col >= 0);
    assert (o->screen.cur.row < o->TermWin.nrow);
    assert (o->screen.cur.col < o->TermWin.ncol);
# else				/* drive with your eyes closed */
    MAX_IT (o->screen.cur.row, 0);
    MAX_IT (o->screen.cur.col, 0);
    MIN_IT (o->screen.cur.row, o->TermWin.nrow - 1);
    MIN_IT (o->screen.cur.col, o->TermWin.ncol - 1);
# endif
    SWAP_IT (o->screen.charset, o->swap.charset, l0);
    SWAP_IT (o->screen.flags, o->swap.flags, tmp);
    o->screen.flags |= Screen_VisibleCursor;
    o->swap.flags |= Screen_VisibleCursor;

    if (rxvtlib_Gr_Displayed (o)) {
	rxvtlib_Gr_scroll (o, 0);
	rxvtlib_Gr_ChangeScreen (o);
    }
#else
# ifdef SCROLL_ON_NO_SECONDARY
    if (rxvtlib_Gr_Displayed (o))
	rxvtlib_Gr_ClearScreen (o);
    if (o->current_screen == PRIMARY) {
	if (!rxvtlib_Gr_Displayed (o))
	    rxvtlib_scroll_text (o, 0, (o->TermWin.nrow - 1), o->TermWin.nrow, 0);
	for (i = o->TermWin.saveLines; i < o->TermWin.nrow + o->TermWin.saveLines; i++)
	    if (o->screen.text[i] == NULL) {
		rxvtlib_blank_screen_mem (o, o->screen.text, o->screen.rend, i, DEFAULT_RSTYLE);
		o->screen.tlen[i] = 0;
	    }
    }
# endif
#endif
    return scrn;
}

/* ------------------------------------------------------------------------- */
/*
 * Change the colour for following text
 */
/* EXTPROTO */
void            rxvtlib_scr_color (rxvtlib *o, unsigned int color, unsigned int Intensity)
{
    if (color == restoreFG)
	color = Color_fg;
    else if (color == restoreBG)
	color = Color_bg;
    else {
	if (o->Xdepth <= 2) {	/* Monochrome - ignore colour changes */
	    switch (Intensity) {
	    case RS_Bold:
		color = Color_fg;
		break;
	    case RS_Blink:
		color = Color_bg;
		break;
	    }
	} else {
#ifndef NO_BRIGHTCOLOR
	    if ((o->rstyle & Intensity) && color >= minCOLOR && color <= maxCOLOR)
		color += (minBrightCOLOR - minCOLOR);
	    else if (color >= minBrightCOLOR && color <= maxBrightCOLOR) {
		if (o->rstyle & Intensity)
		    return;
		color -= (minBrightCOLOR - minCOLOR);
	    }
#endif
	}
    }
    switch (Intensity) {
    case RS_Bold:
	o->rstyle = SET_FGCOLOR (o->rstyle, color);
	break;
    case RS_Blink:
	o->rstyle = SET_BGCOLOR (o->rstyle, color);
	break;
    }
}

/* ------------------------------------------------------------------------- */
/*
 * Change the rendition style for following text
 */
/* EXTPROTO */
void            rxvtlib_scr_rendition (rxvtlib *o, int set, int style)
{
    unsigned int    color;
    rend_t          font_attr;

    if (set) {
/* A: Set style */
	o->rstyle |= style;
	switch (style) {
	case RS_RVid:
	    if (o->rvideo)
		o->rstyle &= ~RS_RVid;
	    break;
#ifndef NO_BRIGHTCOLOR
	case RS_Bold:
	    color = GET_FGCOLOR (o->rstyle);
	    rxvtlib_scr_color (o, (color == Color_fg ? GET_FGCOLOR (o->colorfgbg) : color),
		       RS_Bold);
	    break;
	case RS_Blink:
	    color = GET_BGCOLOR (o->rstyle);
	    rxvtlib_scr_color (o, (color == Color_bg ? GET_BGCOLOR (o->colorfgbg) : color),
		       RS_Blink);
	    break;
#endif
	}
    } else {
/* B: Unset style */
	font_attr = o->rstyle & RS_fontMask;
	o->rstyle &= ~style;

	switch (style) {
	case ~RS_None:		/* default fg/bg colours */
	    o->rstyle = DEFAULT_RSTYLE | font_attr;
	    /* FALLTHROUGH */
	case RS_RVid:
	    if (o->rvideo)
		o->rstyle |= RS_RVid;
	    break;
#ifndef NO_BRIGHTCOLOR
	case RS_Bold:
	    color = GET_FGCOLOR (o->rstyle);
	    if (color >= minBrightCOLOR && color <= maxBrightCOLOR) {
		rxvtlib_scr_color (o, color, RS_Bold);
		if ((o->rstyle & RS_fgMask) == (o->colorfgbg & RS_fgMask))
		    rxvtlib_scr_color (o, restoreFG, RS_Bold);
	    }
	    break;
	case RS_Blink:
	    color = GET_BGCOLOR (o->rstyle);
	    if (color >= minBrightCOLOR && color <= maxBrightCOLOR) {
		rxvtlib_scr_color (o, color, RS_Blink);
		if ((o->rstyle & RS_bgMask) == (o->colorfgbg & RS_bgMask))
		    rxvtlib_scr_color (o, restoreBG, RS_Blink);
	    }
	    break;
#endif
	}
    }
}

/* ------------------------------------------------------------------------- */
/*
 * Scroll text between <row1> and <row2> inclusive, by <count> lines
 * count positive ==> scroll up
 * count negative ==> scroll down
 * spec == 0 for normal routines
 */
/* INTPROTO */
int             rxvtlib_scroll_text (rxvtlib *o, int row1, int row2, int count, int spec)
{
    int             i, j;

    o->want_refresh = 1;
    D_SCREEN (
	      (stderr, "scroll_text(%d,%d,%d,%d): %s", row1, row2, count, spec,
	       (o->current_screen == PRIMARY) ? "Primary" : "Secondary"));

    if (count == 0 || (row1 > row2))
	return 0;

    if ((count > 0) && (row1 == 0) && (o->current_screen == PRIMARY)) {
	o->TermWin.nscrolled += count;
	MIN_IT (o->TermWin.nscrolled, o->TermWin.saveLines);
    } else if (!spec)
	row1 += o->TermWin.saveLines;
    row2 += o->TermWin.saveLines;

    if (o->selection.op && o->current_screen == o->selection.screen) {
	i = o->selection.beg.row + o->TermWin.saveLines;
	j = o->selection.end.row + o->TermWin.saveLines;
	if ((i < row1 && j > row1)
	    || (i < row2 && j > row2)
	    || (i - count < row1 && i >= row1)
	    || (i - count > row2 && i <= row2)
	    || (j - count < row1 && j >= row1)
	    || (j - count > row2 && j <= row2)) {
	    CLEAR_ALL_SELECTION;
	    o->selection.op = SELECTION_CLEAR;	/* XXX: too aggressive? */
	} else if (j >= row1 && j <= row2) {
	    /* move selected region too */
	    o->selection.beg.row -= count;
	    o->selection.end.row -= count;
	    o->selection.mark.row -= count;
	}
    }
    CHECK_SELECTION (0);	/* _after_ TermWin.nscrolled update */

    if (count > 0) {
/* A: scroll up */

	MIN_IT (count, row2 - row1 + 1);
/* A1: Copy lines that will get clobbered by the rotation */
	for (i = 0, j = row1; i < count; i++, j++) {
	    o->buf_text[i] = o->screen.text[j];
	    o->buf_tlen[i] = o->screen.tlen[j];
	    o->buf_rend[i] = o->screen.rend[j];
	}
/* A2: Rotate lines */
	for (j = row1; (j + count) <= row2; j++) {
	    o->screen.text[j] = o->screen.text[j + count];
	    o->screen.tlen[j] = o->screen.tlen[j + count];
	    o->screen.rend[j] = o->screen.rend[j + count];
	}
/* A3: Resurrect lines */
	for (i = 0; i < count; i++, j++) {
	    o->screen.text[j] = o->buf_text[i];
	    o->screen.tlen[j] = o->buf_tlen[i];
	    o->screen.rend[j] = o->buf_rend[i];
	}
    } else if (count < 0) {
/* B: scroll down */

	count = min (-count, row2 - row1 + 1);
/* B1: Copy lines that will get clobbered by the rotation */
	for (i = 0, j = row2; i < count; i++, j--) {
	    o->buf_text[i] = o->screen.text[j];
	    o->buf_tlen[i] = o->screen.tlen[j];
	    o->buf_rend[i] = o->screen.rend[j];
	}
/* B2: Rotate lines */
	for (j = row2; (j - count) >= row1; j--) {
	    o->screen.text[j] = o->screen.text[j - count];
	    o->screen.tlen[j] = o->screen.tlen[j - count];
	    o->screen.rend[j] = o->screen.rend[j - count];
	}
/* B3: Resurrect lines */
	for (i = 0, j = row1; i < count; i++, j++) {
	    o->screen.text[j] = o->buf_text[i];
	    o->screen.tlen[j] = o->buf_tlen[i];
	    o->screen.rend[j] = o->buf_rend[i];
	}
	count = -count;
    }
    if (rxvtlib_Gr_Displayed (o))
	rxvtlib_Gr_scroll (o, count);
    return count;
}

/* ------------------------------------------------------------------------- */
/*
 * A safe scroll text routine
 */
/* EXTPROTO */
void            rxvtlib_scr_scroll_text (rxvtlib *o, int count)
{
    int             row, erow;

    if (count == 0)
	return;
    count = rxvtlib_scroll_text (o, o->screen.tscroll, o->screen.bscroll, count, 0);
/* XXX: Ummm, no?  care needed with [bt]scroll, yes? */
    if (count > 0) {
	row = o->TermWin.nrow - count + o->TermWin.saveLines;
	erow = o->TermWin.nrow + o->TermWin.saveLines;
    } else {
	row = o->TermWin.saveLines;
	erow = o->TermWin.saveLines - count;
    }
    for (; row < erow; row++)
	if (o->screen.text[row] == NULL)
	    rxvtlib_blank_screen_mem (o, o->screen.text, o->screen.rend, row, o->rstyle);
}

/* ------------------------------------------------------------------------- */
/*
 * Add text given in <str> of length <len> to screen struct
 */
/* EXTPROTO */
void            rxvtlib_scr_add_lines (rxvtlib *o, const unsigned char *str, int nlines, int len)
{
    char            c;
    int             i, j, row, last_col, checksel, clearsel;
    text_t         *stp;
    rend_t         *srp;

    if (len <= 0)		/* sanity */
	return;

    o->want_refresh = 1;
    last_col = o->TermWin.ncol;

    D_SCREEN ((stderr, "scr_add_lines(*,%d,%d)", nlines, len));
    ZERO_SCROLLBACK;
    if (nlines > 0) {
	nlines += (o->screen.cur.row - o->screen.bscroll);
	if ((nlines > 0)
	    && (o->screen.tscroll == 0)
	    && (o->screen.bscroll == (o->TermWin.nrow - 1))) {
	    /* _at least_ this many lines need to be scrolled */
	    rxvtlib_scroll_text (o, o->screen.tscroll, o->screen.bscroll, nlines, 0);
	    for (i = nlines, j = o->screen.bscroll + o->TermWin.saveLines; i--; j--) {
		rxvtlib_blank_screen_mem (o, o->screen.text, o->screen.rend, j, o->rstyle);
		o->screen.tlen[j] = 0;
	    }
	    o->screen.cur.row -= nlines;
	}
    }
#ifdef DEBUG_STRICT
    assert (o->screen.cur.col < last_col);
    assert (o->screen.cur.row < o->TermWin.nrow);
    assert (o->screen.cur.row >= -o->TermWin.nscrolled);
#else				/* drive with your eyes closed */
    MIN_IT (o->screen.cur.col, last_col - 1);
    MIN_IT (o->screen.cur.row, o->TermWin.nrow - 1);
    MAX_IT (o->screen.cur.row, -o->TermWin.nscrolled);
#endif
    row = o->screen.cur.row + o->TermWin.saveLines;

    checksel = (o->selection.op && o->current_screen == o->selection.screen) ? 1 : 0;
    clearsel = 0;

    stp = o->screen.text[row];
    srp = o->screen.rend[row];

#ifdef MULTICHAR_SET
    if (o->lost_multi && o->screen.cur.col > 0
	&& ((srp[o->screen.cur.col - 1] & RS_multiMask) == RS_multi1)
	&& *str != '\n' && *str != '\r' && *str != '\t')
	o->chstat = WBYTE;
#endif

    for (i = 0; i < len;) {
	c = str[i++];
	switch (c) {
	case '\t':
	    rxvtlib_scr_tab (o, 1);
	    continue;
	case '\n':
	    if (o->screen.tlen[row] != -1)	/* XXX: think about this */
		MAX_IT (o->screen.tlen[row], o->screen.cur.col);
	    o->screen.flags &= ~Screen_WrapNext;
	    if (o->screen.cur.row == o->screen.bscroll) {
		rxvtlib_scroll_text (o, o->screen.tscroll, o->screen.bscroll, 1, 0);
		j = o->screen.bscroll + o->TermWin.saveLines;
		rxvtlib_blank_screen_mem (o, o->screen.text, o->screen.rend, j, o->rstyle);
		o->screen.tlen[j] = 0;
	    } else if (o->screen.cur.row < (o->TermWin.nrow - 1))
		row = (++o->screen.cur.row) + o->TermWin.saveLines;
	    stp = o->screen.text[row];	/* _must_ refresh */
	    srp = o->screen.rend[row];	/* _must_ refresh */
	    RESET_CHSTAT;
	    continue;
	case '\r':
	    if (o->screen.tlen[row] != -1)	/* XXX: think about this */
		MAX_IT (o->screen.tlen[row], o->screen.cur.col);
	    o->screen.flags &= ~Screen_WrapNext;
	    o->screen.cur.col = 0;
	    RESET_CHSTAT;
	    continue;
	default:
#ifdef MULTICHAR_SET
	    o->rstyle &= ~RS_multiMask;
	    if (o->chstat == WBYTE) {
		o->rstyle |= RS_multi2;	/* multibyte 2nd byte */
		o->chstat = SBYTE;
		if ((o->encoding_method == EUCJ) || (o->encoding_method == GB))
		    c |= 0x80;	/* maybe overkill, but makes it selectable */
	    } else if (o->chstat == SBYTE) {
		if (o->multi_byte || (c & 0x80)) {	/* multibyte 1st byte */
		    o->rstyle |= RS_multi1;
		    o->chstat = WBYTE;
		    if ((o->encoding_method == EUCJ) || (o->encoding_method == GB))
			c |= 0x80;	/* maybe overkill, but makes selectable */
		}
	    } else
#endif
	    if (c == 127)
		continue;	/* yummmm..... */
	    break;
	}

	if (checksel && !ROWCOL_IS_BEFORE (o->screen.cur, o->selection.beg)
	    && ROWCOL_IS_BEFORE (o->screen.cur, o->selection.end)) {