x11.c

另一款电路设计软件

/**********
Copyright 1990 Regents of the University of California.  All rights reserved.
Author: 1988 Jeffrey M. Hsu
**********/

/*
	X11 drivers.
*/

#include "spice.h"

#ifdef HAS_X11

#  include <sys/time.h>

#  include "util.h"

#  include "ftegraph.h"
#  include "ftedbgra.h"
#  include "ftedev.h"
#  include "fteinput.h"
#  include "cpdefs.h"
#  include "ftedefs.h"

#  include <IntrinsicP.h>
#  include <Xatom.h>
#  include <StringDefs.h>
#  include <Xutil.h>
#  include <cursorfont.h>
#  include <Box.h>
#  include <Command.h>
#  include <Form.h>
#  include <Shell.h>

#  ifdef DEBUG
extern int _Xdebug;
#  endif

/* forward declarations */
extern void handlebuttonev(), handlekeypressed(), killwin(), hardcopy(),
	    redraw(), resize();
int errorhandler();

#define RAD_TO_DEG	(180.0 / M_PI)

/* X dependent default parameters */
#define DEF_FONT "6x10"
#define NUMLINESTYLES 8
#define NXPLANES 5      /* note: What is this used for? */
#define BOXSIZE 30      /* initial size of bounding box for zoomin */

typedef struct x11info {
	Window window;
	int	isopen;
	Widget shell, form, view, buttonbox, buttons[2];
	XFontStruct *font;
	GC gc;
	int lastx, lasty;   /* used in X_DrawLine */
	int lastlinestyle;  /* used in X_DrawLine */
} X11devdep;

#define DEVDEP(g) (*((X11devdep *) (g)->devdep))

static void linear_arc( );
static Display *display;
static GC xorgc;
static char *xlinestyles[NUMLINESTYLES] = {	/* test patterns XXX */
	"\001\001\001\001",	/* solid */
	"\001\002\001\002",	/* dots */
	"\007\007\007\007",	/* longdash */
	"\003\003\003\003",	/* shortdash */
	"\007\002\002\002",	/* dots longdash */
	"\003\002\001\002",	/* dots shortdash */
	"\003\003\007\003",	/* short/longdash */
};

static Widget toplevel;
static Bool noclear = False;
static GRAPH *lasthardcopy; /* graph user selected */
static int X11_Open = 0;
static int numdispplanes;

X11_Init()
{

	char buf[512];
	char *displayname;

	XGCValues gcvalues;

	/* grrr, Xtk forced contortions */
	char *argv[2];
	int argc = 2;

	if (cp_getvar("display", VT_STRING, buf)) {
	  displayname = buf;
	} else if (!(displayname = getenv("DISPLAY"))) {
	  internalerror("Can't open X display.");
	  return (1);
	}

#  ifdef DEBUG
	_Xdebug = 1;
#  endif

	argv[0] = "spice3";
	argv[1] = displayname;
/*
	argv[2] = "-geometry";
	argv[3] = "=1x1+2+2";
*/

	/* initialize X toolkit */
	toplevel = XtInitialize("spice3", "Nutmeg", NULL, 0, &argc, argv);

	display = XtDisplay(toplevel);

	X11_Open = 1;

	/* "invert" works better than "xor" for B&W */

	/* xor gc should be a function of the pixels that are written on */
	gcvalues.function = GXxor;
	gcvalues.line_width = 1;
	gcvalues.foreground = 1;
	gcvalues.background = 0;

	xorgc = XCreateGC(display, DefaultRootWindow(display),
	        GCLineWidth | GCFunction | GCForeground | GCBackground,
	        &gcvalues);

	/* set correct information */
	dispdev->numlinestyles = NUMLINESTYLES;
	dispdev->numcolors = NUMCOLORS;

	dispdev->width = DisplayWidth(display, DefaultScreen(display));
	dispdev->height = DisplayHeight(display, DefaultScreen(display));

	/* we don't want non-fatal X errors to call exit */
	XSetErrorHandler(errorhandler);

	numdispplanes = DisplayPlanes(display, DefaultScreen(display));

	return (0);

}

int
errorhandler(display, errorev)
Display *display;
XErrorEvent *errorev;
{
	XGetErrorText(display, errorev->error_code, ErrorMessage, 1024);
	externalerror(ErrorMessage);
	return;
}

/* Recover from bad NewViewPort call. */
#define RECOVERNEWVIEWPORT()    free((char *) graph);\
	            graph = (GRAPH *) NULL; 
	    /* need to do this or else DestroyGraph will free it again */

/* NewViewport is responsible for filling in graph->viewport */
X11_NewViewport(graph)
GRAPH *graph;
{

	char geometry[32], defaultgeometry[32];
	char fontname[513]; /* who knows . . . */
	char *p, *q;
	Cursor cursor;
	XSetWindowAttributes	w_attrs;
	XGCValues gcvalues;
	static Arg formargs[ ] = {
	    { XtNleft, (XtArgVal) XtChainLeft },
	    { XtNresizable, (XtArgVal) TRUE }
	};
	static Arg bboxargs[ ] = {
	    { XtNfromHoriz, (XtArgVal) NULL },
	    { XtNbottom, (XtArgVal) XtChainTop },
	    { XtNtop, (XtArgVal) XtChainTop },
	    { XtNleft, (XtArgVal) XtChainRight },
	    { XtNright, (XtArgVal) XtChainRight }
	};
	static Arg buttonargs[ ] = {
	    { XtNlabel, (XtArgVal) NULL },
	    { XtNfromVert, (XtArgVal) NULL },
	    { XtNbottom, (XtArgVal) XtChainTop },
	    { XtNtop, (XtArgVal) XtChainTop },
	    { XtNleft, (XtArgVal) XtRubber },
	    { XtNright, (XtArgVal) XtRubber },
	    { XtNresizable, (XtArgVal) TRUE }
	};
	static Arg viewargs[] = {
	    { XtNresizable, (XtArgVal) TRUE },
	    { XtNwidth, (XtArgVal) 300 },
	    { XtNheight, (XtArgVal) 300 },
	    { XtNright, (XtArgVal) XtChainRight }
	};
	int	trys;

	graph->devdep = calloc(1, sizeof(X11devdep));

	/* set up new shell */
	DEVDEP(graph).shell = XtCreateApplicationShell("shell",
	        topLevelShellWidgetClass, NULL, 0);

	/* set up form widget */
	DEVDEP(graph).form = XtCreateManagedWidget("form",
	    formWidgetClass, DEVDEP(graph).shell, formargs, XtNumber(formargs));

	/* set up viewport */
	DEVDEP(graph).view = XtCreateManagedWidget("viewport", widgetClass,
	    DEVDEP(graph).form, viewargs, XtNumber(viewargs));
	XtAddEventHandler(DEVDEP(graph).view, ButtonPressMask, FALSE,
	        handlebuttonev, graph);
	XtAddEventHandler(DEVDEP(graph).view, KeyPressMask, FALSE,
	        handlekeypressed, graph);
	XtAddEventHandler(DEVDEP(graph).view, StructureNotifyMask, FALSE,
	        resize, graph);
	XtAddEventHandler(DEVDEP(graph).view, ExposureMask, FALSE,
	        redraw, graph);

	/* set up button box */
	XtSetArg(bboxargs[1], XtNfromHoriz, DEVDEP(graph).view);
	DEVDEP(graph).buttonbox = XtCreateManagedWidget("buttonbox",
	    boxWidgetClass, DEVDEP(graph).form, bboxargs, XtNumber(bboxargs));

	/* set up buttons */
	XtSetArg(buttonargs[0], XtNlabel, "quit");
	XtSetArg(bboxargs[1], XtNfromVert, NULL);
	DEVDEP(graph).buttons[0] = XtCreateManagedWidget("quit",
	    commandWidgetClass, DEVDEP(graph).buttonbox,
	    buttonargs, 1);
	XtAddCallback(DEVDEP(graph).buttons[0], XtNcallback, killwin, graph);

	XtSetArg(buttonargs[0], XtNlabel, "hardcopy");
	XtSetArg(bboxargs[1], XtNfromVert, DEVDEP(graph).buttons[0]);
	DEVDEP(graph).buttons[1] = XtCreateManagedWidget("hardcopy",
	    commandWidgetClass, DEVDEP(graph).buttonbox,
	    buttonargs, 1);
	XtAddCallback(DEVDEP(graph).buttons[1], XtNcallback, hardcopy, graph);

	/* set up fonts */
	if (!cp_getvar("font", VT_STRING, fontname)) {
	  (void) strcpy(fontname, DEF_FONT);
	}

	for (p = fontname; *p && *p <= ' '; p++)
		;
	if (p != fontname) {
		for (q = fontname; *p; *q++ = *p++)
			;
		*q = 0;
	}

	trys = 1;
	while (!(DEVDEP(graph).font = XLoadQueryFont(display, fontname))) {
	  sprintf(ErrorMessage, "can't open font %s", fontname);
	  strcpy(fontname, "fixed");
	  if (trys > 1) {
	      internalerror(ErrorMessage);
	      RECOVERNEWVIEWPORT();
	      return(1);
	  }
	  trys += 1;
	}

	graph->fontwidth = DEVDEP(graph).font->max_bounds.rbearing -
	        DEVDEP(graph).font->min_bounds.lbearing + 1;
	graph->fontheight = DEVDEP(graph).font->max_bounds.ascent +
	        DEVDEP(graph).font->max_bounds.descent + 1;

	XtRealizeWidget(DEVDEP(graph).shell);

	DEVDEP(graph).window = XtWindow(DEVDEP(graph).view);
	DEVDEP(graph).isopen = 0;
	w_attrs.bit_gravity = ForgetGravity;
	XChangeWindowAttributes(display, DEVDEP(graph).window, CWBitGravity,
		&w_attrs);
	/* have to note font and set mask GCFont in XCreateGC, p.w.h. */
	gcvalues.font = DEVDEP(graph).font->fid;
	gcvalues.line_width = 1;
	gcvalues.cap_style = CapNotLast;
	gcvalues.function = GXcopy;
	DEVDEP(graph).gc = XCreateGC(display, DEVDEP(graph).window,
	        GCFont | GCLineWidth | GCCapStyle | GCFunction, &gcvalues);

	/* should absolute.positions really be shell.pos? */
	graph->absolute.xpos = DEVDEP(graph).view->core.x;
	graph->absolute.ypos = DEVDEP(graph).view->core.y;
	graph->absolute.width = DEVDEP(graph).view->core.width;
	graph->absolute.height = DEVDEP(graph).view->core.height;

	initlinestyles();
	initcolors(graph);

	/* set up cursor */
	cursor = XCreateFontCursor(display, XC_left_ptr);
	XDefineCursor(display, DEVDEP(graph).window, cursor);

	return (0);
}

static
initlinestyles()
{

	int i;

	if (numdispplanes > 1) {
	  /* Dotted lines are a distraction when we have colors. */
	  for (i = 2; i < NUMLINESTYLES; i++) {
	    xlinestyles[i] = xlinestyles[0];
	  }
	}

	return;
}

static
initcolors(graph)
    GRAPH *graph;
{
    int i;
    static char *colornames[] = {   "white",    /* white */
	"black", "red", "blue",
	"orange", "green", "pink",
	"brown", "khaki", "plum",
	"orchid", "violet", "maroon",
	"turquoise", "sienna", "coral",
	"cyan", "magenta", "gold",
	"yellow", ""
	};

    XColor visualcolor, exactcolor;
    char buf[BSIZE_SP], colorstring[BSIZE_SP];
    int xmaxcolors = NUMCOLORS; /* note: can we get rid of this? */

    if (numdispplanes == 1) {
	/* black and white */
	xmaxcolors = 2;
	graph->colors[0] = DEVDEP(graph).view->core.background_pixel;
	if (graph->colors[0] == WhitePixel(display, DefaultScreen(display)))
	    graph->colors[1] = BlackPixel(display, DefaultScreen(display));
	else
	    graph->colors[1] = WhitePixel(display, DefaultScreen(display));

    } else {
	if (numdispplanes < NXPLANES)
	    xmaxcolors = 1 << numdispplanes;

	for (i = 0; i < xmaxcolors; i++) {
	    (void) sprintf(buf, "color%d", i);
	    if (!cp_getvar(buf, VT_STRING, colorstring))
	    (void) strcpy(colorstring, colornames[i]);
	    if (!XAllocNamedColor(display,
		    DefaultColormap(display, DefaultScreen(display)),
		    colorstring, &visualcolor, &exactcolor)) {
		(void) sprintf(ErrorMessage,
		    "can't get color %s\n", colorstring);
		externalerror(ErrorMessage);
		graph->colors[i] = i ? BlackPixel(display,
		    DefaultScreen(display))
		    : WhitePixel(display, DefaultScreen(display));
		continue;
	    }
	    graph->colors[i] = visualcolor.pixel;
	    if (i > 0 &&
		graph->colors[i] == DEVDEP(graph).view->core.background_pixel) {
		graph->colors[i] = graph->colors[0];
	    }
	}

	if (graph->colors[0] != DEVDEP(graph).view->core.background_pixel) {
	    graph->colors[0] = DEVDEP(graph).view->core.background_pixel;
	}
    }

    for (i = xmaxcolors; i < NUMCOLORS; i++) {
	graph->colors[i] = graph->colors[i + 1 - xmaxcolors];
    }

    return;
}

/* This routine closes the X connection.
	It is not to be called for finishing a graph. */
X11_Close()
{
	XCloseDisplay(display);
}

X11_DrawLine(x1, y1, x2, y2)
int x1, y1, x2, y2;
{

	if (DEVDEP(currentgraph).isopen)
		XDrawLine(display, DEVDEP(currentgraph).window,
			DEVDEP(currentgraph).gc,
			x1, currentgraph->absolute.height - y1,
			x2, currentgraph->absolute.height - y2);


}

/*ARGSUSED*/
X11_Arc(x0, y0, radius, theta1, theta2)
int x0, y0, radius;
double theta1, theta2;
{

    int	t1, t2;

    if (!cp_getvar("x11lineararcs", VT_BOOL, (char *) &t1)) {
	linear_arc(x0, y0, radius, theta1, theta2);
    }

    if (DEVDEP(currentgraph).isopen) {
	if (theta1 >= theta2)
	    theta2 = 2 * M_PI + theta2;
	t1 = 64 * (180.0 / M_PI) * theta1;
	t2 = 64 * (180.0 / M_PI) * theta2 - t1;
	if (t2 == 0)
		return;
	XDrawArc(display, DEVDEP(currentgraph).window, DEVDEP(currentgraph).gc,
		x0 - radius,
		currentgraph->absolute.height - radius - y0,
		2 * radius, 2 * radius, t1, t2);
#  ifdef notdef
	printf("at %d, %d, %g %g x %d :: (%d, %d)\n",
		x0, y0, theta1, theta2, radius, t1, t2);
		printf("skip\n");
	XSync(display, 0);
	printf("XDrawArc(%d, %d, %d, %d, %d, %d)\n", x0 - radius,
		currentgraph->absolute.height - radius - y0,
		2 * radius, 2 * radius, t1, t2);
#  endif
    }
}

/* note: x and y are the LOWER left corner of text */
X11_Text(text, x, y)
char *text;
int x, y;
{

/* We specify text position by lower left corner, so have to adjust for
	X11's font nonsense. */

	if (DEVDEP(currentgraph).isopen)
		XDrawString(display, DEVDEP(currentgraph).window,
		    DEVDEP(currentgraph).gc, x,
		    currentgraph->absolute.height
			- (y + DEVDEP(currentgraph).font->max_bounds.descent),
		    text, strlen(text));

	/* note: unlike before, we do not save any text here */

}

/*ARGSUSED*/
X11_DefineColor(colorid, red, green, blue)
int colorid;
double red, green, blue;
{
	internalerror("X11_DefineColor not implemented.");
	return(0);
}


/*ARGSUSED*/
X11_DefineLinestyle(linestyleid, mask)
int linestyleid;
int mask;
{
	internalerror("X11_DefineLinestyle not implemented.");
}

X11_SetLinestyle(linestyleid)
int linestyleid;
{
	XGCValues values;

	if (currentgraph->linestyle != linestyleid) {

#  ifdef notdef
	  switch (linestyleid %3) {
	  case 0:
	    values.line_style = LineSolid;
		break;
	  case 1:
	    values.line_style = LineOnOffDash;
		break;
	  case 2:
	    values.line_style = LineDoubleDash;
		break;
	  }
#  endif
	  if (linestyleid == 0 || numdispplanes > 1 && linestyleid != 1) {
	    /* solid if linestyle 0 or if has color, allow only one
	     * dashed linestyle */
	    values.line_style = LineSolid;
	  } else {
	    values.line_style = LineOnOffDash;
	  }
	  XChangeGC(display, DEVDEP(currentgraph).gc, GCLineStyle, &values);

	  currentgraph->linestyle = linestyleid;
	  XSetDashes(display, DEVDEP(currentgraph).gc, 0,
		xlinestyles[linestyleid], 4);
	}
}

X11_SetColor(colorid)
int colorid;
{

	currentgraph->currentcolor = colorid;
	XSetForeground(display, DEVDEP(currentgraph).gc,
	        currentgraph->colors[colorid]);

}

X11_Update()
{

	if (X11_Open)
		XSync(display, 0);

}

X11_Clear()
{

	if (!noclear) /* hack so exposures look like they're handled nicely */
	  XClearWindow(display, DEVDEP(currentgraph).window);

}

void
handlekeypressed(w, clientdata, calldata)