rxvtlib_scrollbar.c

具有IDE功能的编辑器

    if (o->scrollbarGC == None) {
	XGCValues       gcvalue;

#ifdef XTERM_SCROLLBAR
	sb_width = SB_WIDTH - 1;
	gcvalue.stipple = XCreateBitmapFromData (o->Xdisplay, o->scrollBar.win,
						 o->sb_bits, 12, 2);
	if (!gcvalue.stipple) {
	    print_error ("can't create bitmap");
	    o->killed = EXIT_FAILURE | DO_EXIT;
	    return 0;
	}
	gcvalue.fill_style = FillOpaqueStippled;
	gcvalue.foreground = o->PixColors[Color_fg];
	gcvalue.background = o->PixColors[Color_bg];

	o->scrollbarGC = XCreateGC (o->Xdisplay, o->scrollBar.win,
				 GCForeground | GCBackground |
				 GCFillStyle | GCStipple, &gcvalue);
	gcvalue.foreground = o->PixColors[Color_border];
	o->ShadowGC = XCreateGC (o->Xdisplay, o->scrollBar.win, GCForeground, &gcvalue);
#else				/* XTERM_SCROLLBAR */
	sb_width = SB_WIDTH;

	gcvalue.foreground = o->PixColors[Color_trough];
	if (o->sb_shadow) {
	    XSetWindowBackground (o->Xdisplay, o->scrollBar.win, gcvalue.foreground);
	    XClearWindow (o->Xdisplay, o->scrollBar.win);
	}
	gcvalue.foreground = (o->Xdepth <= 2 ? o->PixColors[Color_fg]
			      : o->PixColors[Color_scroll]);
	o->scrollbarGC = XCreateGC (o->Xdisplay, o->scrollBar.win, GCForeground,
				 &gcvalue);

	gcvalue.foreground = o->PixColors[Color_topShadow];
	o->topShadowGC = XCreateGC (o->Xdisplay, o->scrollBar.win,
				 GCForeground, &gcvalue);

	gcvalue.foreground = o->PixColors[Color_bottomShadow];
	o->botShadowGC = XCreateGC (o->Xdisplay, o->scrollBar.win,
				 GCForeground, &gcvalue);
#endif				/* XTERM_SCROLLBAR */
    }
    if (update) {
	int             top = (o->TermWin.nscrolled - o->TermWin.view_start);
	int             bot = top + (o->TermWin.nrow - 1);
	int             len =

	    max ((o->TermWin.nscrolled + (o->TermWin.nrow - 1)), 1);
	int             adj = ((bot - top) * scrollbar_size()) % len;

	o->scrollBar.top = (o->scrollBar.beg + (top * scrollbar_size ()) / len);
        scrollbar_len = (((bot - top) * scrollbar_size()) / len +
			 SCROLL_MINHEIGHT + ((adj > 0) ? 1 : 0));
	o->scrollBar.bot = (o->scrollBar.top + scrollbar_len);
	/* no change */
	if ((o->scrollBar.top == last_top) && (o->scrollBar.bot == last_bot)
	    && ((o->scrollBar.state == last_state) || (!scrollbar_isUpDn())))
	    return 0;
    }
/* instead of XClearWindow (Xdisplay, scrollBar.win); */
#ifdef XTERM_SCROLLBAR
    xsb = (o->Options & Opt_scrollBar_right) ? 1 : 0;
#endif
    if (last_top < o->scrollBar.top)
	XClearArea (o->Xdisplay, o->scrollBar.win,
		    o->sb_shadow + xsb, last_top,
		    sb_width, (o->scrollBar.top - last_top), False);

    if (o->scrollBar.bot < last_bot)
	XClearArea (o->Xdisplay, o->scrollBar.win,
		    o->sb_shadow + xsb, o->scrollBar.bot,
		    sb_width, (last_bot - o->scrollBar.bot), False);

    last_top = o->scrollBar.top;
    last_bot = o->scrollBar.bot;

/* scrollbar slider */
#ifdef XTERM_SCROLLBAR
    XFillRectangle (o->Xdisplay, o->scrollBar.win, o->scrollbarGC,
		    xsb + 1, o->scrollBar.top,
		    sb_width - 2, scrollbar_len);

    XDrawLine (o->Xdisplay, o->scrollBar.win, o->ShadowGC,
	      xsb ? 0 : o->sb_width, o->scrollBar.beg, xsb ? 0 : sb_width,
	      o->scrollBar.end);

#else
#ifdef SB_BORDER
    {
	int             xofs;

	if (o->Options & Opt_scrollBar_right)
	    xofs = 0;
	else
	    xofs = (o->sb_shadow) ? SB_WIDTH : SB_WIDTH - 1;

	XDrawLine (o->Xdisplay, o->scrollBar.win, o->botShadowGC,
		   xofs, 0, xofs, o->scrollBar.end + SB_WIDTH);
    }
#endif
    XFillRectangle (o->Xdisplay, o->scrollBar.win, o->scrollbarGC,
		    o->sb_shadow, o->scrollBar.top,
		   sb_width, scrollbar_len);

    if (o->sb_shadow)
	/* trough shadow */
	rxvtlib_Draw_Shadow (o, o->scrollBar.win,
		     o->botShadowGC, o->topShadowGC,
		     0, 0,
		     (sb_width + 2 * o->sb_shadow),
		     (o->scrollBar.end + (sb_width + 1) + o->sb_shadow));
/* shadow for scrollbar slider */
    rxvtlib_Draw_Shadow (o, o->scrollBar.win,
		 o->topShadowGC, o->botShadowGC,
		 o->sb_shadow, o->scrollBar.top, sb_width,
		scrollbar_len);

/*
 * Redraw scrollbar arrows
 */
    rxvtlib_Draw_button (o, o->sb_shadow, o->sb_shadow, (scrollbar_isUp ()? -1 : +1), UP);
    rxvtlib_Draw_button (o, o->sb_shadow, (o->scrollBar.end + 1),
		 (scrollbar_isDn ()? -1 : +1), DN);
#endif				/* XTERM_SCROLLBAR */
    last_top = o->scrollBar.top;
    last_bot = o->scrollBar.bot;
    last_state = o->scrollBar.state;

#else				/* NEXT_SCROLLBAR */
    Pixmap          buffer;
    int             height = o->scrollBar.end + SB_BUTTON_TOTAL_HEIGHT + SB_PADDING;

    if (o->blackGC == NULL)
	rxvtlib_init_scrollbar_stuff (o);
    if (o->killed)
	return 0;

    if (update) {
	int             top = (o->TermWin.nscrolled - o->TermWin.view_start);
	int             bot = top + (o->TermWin.nrow - 1);
	int             len =

	    max ((o->TermWin.nscrolled + (o->TermWin.nrow - 1)), 1);
	int             adj = ((bot - top) * scrollbar_size()) % len;

	o->scrollBar.top = (o->scrollBar.beg + (top * scrollbar_size ()) / len);
        scrollbar_len = (((bot - top) * scrollbar_size()) / len +
			 SCROLL_MINHEIGHT + ((adj > 0) ? 1 : 0));
	o->scrollBar.bot = (o->scrollBar.top + scrollbar_len);
	/* no change */
	if ((o->scrollBar.top == last_top) && (o->scrollBar.bot == last_bot)
	    && ((o->scrollBar.state == last_state) || (!scrollbar_isUpDn())))
	    return 0;
    }
/* create double buffer */
    buffer =
	XCreatePixmap (o->Xdisplay, o->scrollBar.win, SB_WIDTH + 1, height, o->Xdepth);

    last_top = o->scrollBar.top;
    last_bot = o->scrollBar.bot;
    last_state = o->scrollBar.state;

/* draw the background */
    XFillRectangle (o->Xdisplay, buffer, o->grayGC, 0, 0, SB_WIDTH + 1, height);
    XDrawRectangle(o->Xdisplay, buffer, o->blackGC, 0, -SB_BORDER_WIDTH,
		   SB_WIDTH, height + SB_BORDER_WIDTH);

    if (o->TermWin.nscrolled > 0) {
	XFillRectangle(o->Xdisplay, buffer, o->stippleGC,
		       SB_LEFT_PADDING, SB_PADDING,
		       SB_BUTTON_WIDTH,
		       height - SB_BUTTON_TOTAL_HEIGHT - SB_PADDING);
	XFillRectangle(o->Xdisplay, buffer, o->grayGC,
		       SB_LEFT_PADDING, o->scrollBar.top + SB_PADDING,
		       SB_BUTTON_WIDTH, scrollbar_len);
	rxvtlib_drawBevel(o, buffer, SB_BUTTON_BEVEL_X, o->scrollBar.top + SB_PADDING,
		  SB_BUTTON_WIDTH, scrollbar_len);
	rxvtlib_drawBevel(o, buffer, SB_BUTTON_BEVEL_X, height - SB_BUTTON_BOTH_HEIGHT,
		  SB_BUTTON_WIDTH, SB_BUTTON_HEIGHT);
	rxvtlib_drawBevel(o, buffer, SB_BUTTON_BEVEL_X, height - SB_BUTTON_SINGLE_HEIGHT,
		  SB_BUTTON_WIDTH, SB_BUTTON_HEIGHT);

	XCopyArea (o->Xdisplay, o->dimple, buffer, o->whiteGC, 0, 0,
		   SCROLLER_DIMPLE_WIDTH, SCROLLER_DIMPLE_HEIGHT,
		  (SB_WIDTH - SCROLLER_DIMPLE_WIDTH) / 2,
		  o->scrollBar.top + SB_BEVEL_WIDTH_UPPER_LEFT +
		  (scrollbar_len - SCROLLER_DIMPLE_HEIGHT) / 2);

	if (scrollbar_isUp ())
	    XCopyArea(o->Xdisplay, o->upArrowHi, buffer, o->whiteGC, 0, 0,
		      ARROW_WIDTH, ARROW_HEIGHT,
		      SB_BUTTON_FACE_X,
		      height - (SB_BUTTON_BOTH_HEIGHT - SB_BEVEL_WIDTH_UPPER_LEFT));
	else
	    XCopyArea(o->Xdisplay, o->upArrow, buffer, o->whiteGC, 0, 0,
		      ARROW_WIDTH, ARROW_HEIGHT,
		      SB_BUTTON_FACE_X,
		      height - (SB_BUTTON_BOTH_HEIGHT - SB_BEVEL_WIDTH_UPPER_LEFT));

	if (scrollbar_isDn ())
	    XCopyArea(o->Xdisplay, o->downArrowHi, buffer, o->whiteGC, 0, 0,
		      ARROW_WIDTH, ARROW_HEIGHT,
		      SB_BUTTON_FACE_X,
		      height - (SB_BUTTON_SINGLE_HEIGHT - SB_BEVEL_WIDTH_UPPER_LEFT));
	else
	    XCopyArea(o->Xdisplay, o->downArrow, buffer, o->whiteGC, 0, 0,
		      ARROW_WIDTH, ARROW_HEIGHT,
		      SB_BUTTON_FACE_X,
		      height - (SB_BUTTON_SINGLE_HEIGHT - SB_BEVEL_WIDTH_UPPER_LEFT));
    } else {
	XFillRectangle(o->Xdisplay, buffer, o->stippleGC,
		       SB_LEFT_PADDING, SB_PADDING,
		       SB_BUTTON_WIDTH, height - SB_MARGIN_SPACE);
    }

    if (o->Options & Opt_scrollBar_right)
	XCopyArea (o->Xdisplay, buffer, o->scrollBar.win, o->grayGC, 0, 0,
		  SB_WIDTH + SB_BORDER_WIDTH, height, 0, 0);
    else
	XCopyArea (o->Xdisplay, buffer, o->scrollBar.win, o->grayGC, 0, 0,
		  SB_WIDTH + SB_BORDER_WIDTH, height, -SB_BORDER_WIDTH, 0);

    XFreePixmap (o->Xdisplay, buffer);
#endif				/* ! NEXT_SCROLLBAR */
    return 1;
}

/* EXTPROTO */
int             rxvtlib_scrollbar_mapping (rxvtlib *o, int map)
{
    int             change = 0;

    if (map && !scrollbar_visible ()) {
	o->scrollBar.state = 1;
	if (o->scrollBar.win == 0)
	    return 0;
	XMapWindow (o->Xdisplay, o->scrollBar.win);
	change = 1;
    } else if (!map && scrollbar_visible ()) {
	o->scrollBar.state = 0;
	XUnmapWindow (o->Xdisplay, o->scrollBar.win);
	change = 1;
    }
    return change;
}

/* EXTPROTO */
void            rxvtlib_map_scrollBar (rxvtlib *o, int map)
{
    if (rxvtlib_scrollbar_mapping (o, map)) {
	rxvtlib_resize_all_windows (o);
	rxvtlib_scr_touch (o);
    }
}

/*----------------------- end-of-file (C source) -----------------------*/