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/*-----------------------------------------------------------------------*/
/* text.c --- text processing routines for xcircuit */
/* Copyright (c) 1998 Tim Edwards, Johns Hopkins University */
/*-----------------------------------------------------------------------*/
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
/*------------------------------------------------------------------------*/
/* Local includes */
/*------------------------------------------------------------------------*/
#include "colordefs.h"
#include "xcircuit.h"
#include "alpha.h"
/*------------------------------------------------------------------------*/
/* External Variable definitions */
/*------------------------------------------------------------------------*/
extern Display *dpy;
extern Clientdata areastruct;
extern short textpos;
/*------------------------------------------------------------------------*/
/* Declarations of functions defined externally to functions.c */
/*------------------------------------------------------------------------*/
short ULength();
extern void UDrawLines();
extern float UTopScale();
extern int *appcolors;
#define HSPACE 3
/*---------------------------------------------------------------------*/
/* draw a single character at 0, 0 using current transformation matrix */
/*---------------------------------------------------------------------*/
short UDrawChar(localdata, code, styles)
objinstptr localdata;
short code, styles;
{
alphaptr drawchar;
XPoint alphapts[2], *curpoint;
short totalpts, i;
short ffont = (styles & 6);
short localwidth;
XPoint *pointptr;
/* set proper font */
switch (ffont) {
case 0: drawchar = alphabet[code]; break;
case 2: drawchar = helveticabet[code]; break;
case 4: drawchar = courierbet[code]; break;
case 6: drawchar = symbolbet[code]; break;
}
localwidth = (ffont == 4) ? COURIER_WIDTH : drawchar->width;
totalpts = 1 + drawchar->number[0] + drawchar->number[1] +
drawchar->number[2];
if (styles & 1) USlantCTM(DCTM, 0.25); /* premultiply by slanting function */
/* for italic styles */
if (!(styles & 64)) {
for (i = 0; i < drawchar->parts; i++)
UDrawLines(localdata, drawchar->points[i], drawchar->number[i]);
/* under- and overlines */
if (styles & 8)
alphapts[0].y = alphapts[1].y = -6;
else if (styles & 16)
alphapts[0].y = alphapts[1].y = TEXTHEIGHT - 6;
else if (styles & 32)
alphapts[0].y = alphapts[1].y = TEXTHEIGHT + 4;
if (styles & 56) {
alphapts[0].x = -HSPACE; alphapts[1].x = localwidth;
UDrawSimpleLine(localdata, &alphapts[0], &alphapts[1]);
}
}
return ((styles & 64) ? -localwidth : localwidth);
}
/* setlineattrib and setscript are just conveniences. . . */
void setlineattrib(style)
short style;
{
short tmpwidth;
float tscale = UTopScale();
tmpwidth = (short)(((style & 2) ? 4.0 : 2.0) * tscale);
if (tmpwidth < 2) tmpwidth = 0;
XSetLineAttributes(dpy, areastruct.gc, tmpwidth, LineSolid, CapRound,
JoinBevel);
}
void UDrawString(localdata, drawlabel)
objinstptr localdata;
labelptr drawlabel;
{
uchar *strptr = drawlabel->string;
short tmplength, fstyle, ffont, fline = 0, backct = 1, tmpwidth;
short tmpjust;
short oldy, oldfont, oldstyle;
float tmpscale = 1.0;
XPoint newpoint, bboxin[2], bboxout[2];
Boolean xm, ym;
/* calculate the transformation matrix for this object */
/* in natural units of the alphabet vectors */
/* (conversion to window units) */
UPushCTM();
UPreMultCTM(DCTM, drawlabel->position, drawlabel->scale, drawlabel->rotation);
/* check for flip invariance; recompute CTM and justification if necessary */
tmpjust = flipadjust(drawlabel->justify);
tmplength = ULength(drawlabel->string, 0.0, 0); /* "natural" (unscaled) length */
newpoint.x = (tmpjust & NOTLEFT ?
(tmpjust & RIGHT ? -tmplength : -tmplength >> 1) : 0);
newpoint.y = (tmpjust & NOTBOTTOM ?
(tmpjust & TOP ? -TEXTHEIGHT : -HALFHEIGHT) : 0);
#ifdef SCHEMA
/* Pinlabels have an additional offset spacing to pad */
/* them from the circuit point to which they attach. */
if (drawlabel->pin)
pinadjust(tmpjust, &(newpoint.x), &(newpoint.y));
#endif
oldy = newpoint.y;
/* do quick calculation on bounding box; don't draw if off-screen */
bboxin[0].x = newpoint.x;
bboxin[0].y = newpoint.y - HALFHEIGHT;
bboxin[1].x = newpoint.x + tmplength;
bboxin[1].y = newpoint.y + TEXTHEIGHT + HALFHEIGHT;
UTransformbyCTM(DCTM, bboxin, bboxout, 2);
xm = (bboxout[0].x < bboxout[1].x) ? 0 : 1;
ym = (bboxout[0].y < bboxout[1].y) ? 0 : 1;
if (bboxout[xm].x < areastruct.width && bboxout[ym].y < areastruct.height &&
bboxout[!xm].x > 0 && bboxout[!ym].y > 0) {
for (strptr = drawlabel->string; *strptr != '\0'; strptr++) {
/* make a character transformation matrix by translating to newpoint */
UPushCTM();
UPreMultCTM(DCTM, newpoint, tmpscale, 0);
/* deal with in-line text format control escape sequences */
if ((short)(*strptr) == TEXT_ESC) {
short control = (short)(*(++strptr));
if (control >= FONT_START) {
if (control < FONT_START + FONTS) {
fstyle = (control - FONT_START) % 4;
ffont = ((control - FONT_START) >> 1) & 0xfe;
}
else fstyle = ffont = 0; /* user-included fonts */
if (oldy == newpoint.y) { /* set top-level font and style */
oldfont = ffont;
oldstyle = fstyle;
}
setlineattrib(fstyle);
fline = 0; /* font change disables underline/overline */
}
else if (control == SUBSCRIPT) {
tmpscale *= SUBSCALE;
newpoint.y -= (short)((TEXTHEIGHT >> 1) * tmpscale);
fline = 0;
}
else if (control == SUPERSCRIPT) {
tmpscale *= SUBSCALE;
newpoint.y += (short)(TEXTHEIGHT * tmpscale);
fline = 0;
}
else if (control == NORMALSCRIPT) {
tmpscale = 1.0;
ffont = oldfont; /* revert to top-level font and style */
fstyle = oldstyle;
newpoint.y = oldy;
fline = 0;
}
else if (control == UNDERLINE) fline = 8;
else if (control == OVERLINE) {
uchar *quickptr = strptr + 1;
static uchar biglittle[7] = {'b', 'd', 'f', 'h', 'k', 'l', 't'};
short lowerct = 0, i;
/* any control character stops the /overline */
for (; (*quickptr != TEXT_ESC) && (*quickptr != '\0'); quickptr++)
if (islower(*quickptr)) {
lowerct++;
for (i = 0; i < 7; i++) if (*quickptr == biglittle[i])
lowerct--;
}
fline = ((short)(quickptr - strptr - 1) == lowerct) ? 16 : 32;
}
else if (control == NOLINE) fline = 0;
else if (control == BACKSPACE) {
if (strptr + 1 - (backct * 3) >= drawlabel->string) {
newpoint.x += UDrawChar(localdata, *(strptr + 1 - (backct * 3)),
(fstyle & 1) | ffont | 64) * tmpscale;
}
backct = ((short)(*(strptr + 1)) != TEXT_ESC || (short)(*(strptr + 2))
!= BACKSPACE) ? 1 : backct + 1;
}
else if (control == HALFSPACE || control == QTRSPACE) {
short addx = UDrawChar(localdata, 32, (fstyle & 1) | ffont | fline);
newpoint.x += addx >> ((control == HALFSPACE) ? 1 : 2);
}
}
else
newpoint.x += UDrawChar(localdata, *strptr, (fstyle & 1) | ffont | fline)
* tmpscale;
/* pop the character transformation matrix */
UPopCTM();
}
}
/* pop the string transformation matrix */
UPopCTM();
#ifdef SCHEMA
if (drawlabel->pin) {
UDrawX(drawlabel);
}
#endif
}
short ULength(string, newscale, dostop)
uchar *string;
float newscale;
short dostop;
{
short backct = 1;
float oldscale, strscale, xtotal = 0.5;
uchar *strptr;
objinstptr *scaleobj;
alphaptr *somebet;
if (newscale > 0.0) strscale = UTopScale() * newscale;
else strscale = 1.0;
oldscale = strscale;
for (strptr = string; *strptr != '\0'; strptr++) {
if (dostop & ((short)(strptr - string) == textpos)) break;
if ((short)(*strptr) == TEXT_ESC) {
short control = (short)(*(++strptr));
if (control == SUPERSCRIPT || control == SUBSCRIPT) strscale *= SUBSCALE;
else if (control == NORMALSCRIPT) strscale = oldscale;
else if (control == HALFSPACE) {
xtotal += (float)((*(somebet + 32))->width) * strscale / 2;
}
else if (control == QTRSPACE) {
xtotal += (float)((*(somebet + 32))->width) * strscale / 4;
}
else if (control == BACKSPACE) {
if (strptr + 1 - (backct * 3) >= string) {
if (somebet == courierbet)
xtotal -= COURIER_WIDTH * strscale;
else
xtotal -= (float)((*(somebet + *(strptr + 1 - (backct * 3))))->width)
* strscale;
}
backct = (*(strptr + 1) != TEXT_ESC || *(strptr + 2) != BACKSPACE)
? 1 : backct + 1;
}
else if (control >= FONT_START) {
if (control < FONT_START + FONTS) {
switch ((control - FONT_START) >> 2) {
case 1: somebet = helveticabet; break;
case 2: somebet = courierbet; break;
case 3: somebet = symbolbet; break;
default: somebet = alphabet; break;
}
}
else somebet = alphabet;
}
}
else {
if (somebet == courierbet)
xtotal += COURIER_WIDTH * strscale;
else
xtotal += (float)((*(somebet + *strptr))->width) * strscale;
}
}
return ((short)(xtotal - (HSPACE * oldscale)));
}
/*------------------------------------------------------------------------*/
/* simple routines for drawing and erasing labels */
undrawtext(settext)
labelptr settext;
{
XSetFunction(dpy, areastruct.gc, GXcopy);
XSetForeground(dpy, areastruct.gc, BACKGROUND);
UDrawString(areastruct.topobject, settext);
}
redrawtext(settext)
labelptr settext;
{
XTopSetForeground(settext->color);
UDrawString(areastruct.topobject, settext);
}
/*------------------------------------------------------------------------*/
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