xenocara/app/xgc/interpret.c

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2006-11-25 13:07:29 -07:00
/*
** interpret.c
**
** interprets and executes lines in the Xgc syntax.
*/
#include <stdio.h>
#include <stdlib.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include "xgc.h"
#include "tile"
/* interpret(string)
** -----------------
** Takes string, which is a line written in the xgc syntax, figures
** out what it means, and passes the buck to the right procedure.
** That procedure gets called with feedback set to FALSE; interpret()
** is only called if the user is selecting things interactively.
**
** This procedure will go away when I can figure out how to make yacc
** and lex read from strings as well as files.
*/
void
interpret(const char *string)
{
char word1[20], word2[80];
int i;
sscanf(string,"%s",word1);
if (!strcmp(word1,"run")) run_test();
else {
sscanf(string,"%s %s",word1,word2);
print_if_recording(string);
/* So word1 is the first word on the line and word2 is the second.
Now the fun begins... */
if (!strcmp(word1,TestStuff.choice.text)) {
for (i=0;i<NUM_TESTS;++i) {
if (!strcmp(word2,(TestStuff.data)[i].text)) {
change_test((TestStuff.data)[i].code,FALSE);
break;
}
}
}
else if (!strcmp(word1,FunctionStuff.choice.text)) {
for (i=0;i<NUM_FUNCTIONS;++i) {
if (!strcmp(word2,(FunctionStuff.data)[i].text)) {
GC_change_function((FunctionStuff.data)[i].code,FALSE);
break;
}
}
}
else if (!strcmp(word1,LinestyleStuff.choice.text)) {
for (i=0;i<NUM_LINESTYLES;++i) {
if (!strcmp(word2,(LinestyleStuff.data)[i].text)) {
GC_change_linestyle((LinestyleStuff.data)[i].code,FALSE);
break;
}
}
}
else if (!strcmp(word1,"linewidth"))
GC_change_linewidth(atoi(word2),FALSE);
else if (!strcmp(word1,CapstyleStuff.choice.text)) {
for (i=0;i<NUM_CAPSTYLES;++i) {
if (!strcmp(word2,(CapstyleStuff.data)[i].text)) {
GC_change_capstyle((CapstyleStuff.data)[i].code,FALSE);
break;
}
}
}
else if (!strcmp(word1,JoinstyleStuff.choice.text)) {
for (i=0;i<NUM_JOINSTYLES;++i) {
if (!strcmp(word2,(JoinstyleStuff.data)[i].text)) {
GC_change_joinstyle((JoinstyleStuff.data)[i].code,FALSE);
break;
}
}
}
else if (!strcmp(word1,FillstyleStuff.choice.text)) {
for (i=0;i<NUM_FILLSTYLES;++i) {
if (!strcmp(word2,(FillstyleStuff.data)[i].text)) {
GC_change_fillstyle((FillstyleStuff.data)[i].code,FALSE);
break;
}
}
}
else if (!strcmp(word1,FillruleStuff.choice.text)) {
for (i=0;i<NUM_FILLRULES;++i) {
if (!strcmp(word2,(FillruleStuff.data)[i].text)) {
GC_change_fillrule((FillruleStuff.data)[i].code,FALSE);
break;
}
}
}
else if (!strcmp(word1,ArcmodeStuff.choice.text)) {
for (i=0;i<NUM_ARCMODES;++i) {
if (!strcmp(word2,(ArcmodeStuff.data)[i].text)) {
GC_change_arcmode((ArcmodeStuff.data)[i].code,FALSE);
break;
}
}
}
else if (!strcmp(word1,"planemask"))
GC_change_planemask((unsigned long) atoi(word2),FALSE);
else if (!strcmp(word1,"dashlist"))
GC_change_dashlist(atoi(word2),FALSE);
else if (!strcmp(word1,"font"))
GC_change_font(word2,FALSE);
else if (!strcmp(word1,"foreground"))
GC_change_foreground((unsigned long) atoi(word2),FALSE);
else if (!strcmp(word1,"background"))
GC_change_background((unsigned long) atoi(word2),FALSE);
else if (!strcmp(word1,"percent"))
change_percent(atoi(word2), FALSE);
else fprintf(stderr,"Ack... %s %s\n",word1,word2);
}
}
#ifdef notdef
void
interpret(const char *instring)
{
FILE *inend;
print_if_recording(instring);
yyin = outend;
inend = fdopen(fildes[1],"w");
fprintf(inend,"%s",instring);
fclose(inend);
yyparse();
}
#endif
#define select_correct_button(which,number) \
select_button(GCdescs[(which)],(number));
/* GC_change_blahzee(foo,feedback)
** ---------------------
** Changes the blahzee field in xgc's GC to foo. If feedback is TRUE,
** changes the display to reflect this (makes it look like the user
** selected the button, or typed in the text, or whatever).
*/
void
GC_change_function(int function, Boolean feedback)
{
XSetFunction(X.dpy,X.gc,function);
X.gcv.function = function;
if (feedback) select_correct_button(CFunction,function);
}
void
GC_change_foreground(unsigned long foreground, Boolean feedback)
{
char text[40];
XSetForeground(X.dpy,X.miscgc,foreground);
XCopyPlane(X.dpy,X.stipple,X.tile,X.miscgc,0,0,tile_width,tile_height,0,0,1);
XSetForeground(X.dpy,X.gc,foreground);
X.gcv.foreground = foreground;
XSetTile(X.dpy,X.gc,X.tile);
XSetTile(X.dpy,X.miscgc,X.tile);
if (feedback) {
snprintf(text, sizeof text, "%lu",foreground);
change_text(foregroundtext,text);
}
}
void
GC_change_background(unsigned long background, Boolean feedback)
{
char text[40];
XSetBackground(X.dpy,X.miscgc,background);
XCopyPlane(X.dpy,X.stipple,X.tile,X.miscgc,0,0,tile_width,tile_height,0,0,1);
XSetBackground(X.dpy,X.gc,background);
X.gcv.background = background;
XSetTile(X.dpy,X.gc,X.tile);
XSetTile(X.dpy,X.miscgc,X.tile);
/* Update the background of the test window NOW. */
XSetWindowBackground(X.dpy,XtWindow(test),background);
XClearWindow(X.dpy,XtWindow(test));
if (feedback) {
snprintf(text, sizeof text, "%lu",background);
change_text(backgroundtext,text);
}
}
void
GC_change_linewidth(int linewidth, Boolean feedback)
{
char text[40];
X.gcv.line_width = linewidth;
XChangeGC(X.dpy,X.gc,GCLineWidth,&X.gcv);
if (feedback) {
snprintf(text, sizeof text, "%d",linewidth);
change_text(linewidthtext,text);
}
}
void
GC_change_linestyle(int linestyle, Boolean feedback)
{
X.gcv.line_style = linestyle;
XChangeGC(X.dpy,X.gc,GCLineStyle,&X.gcv);
if (feedback) select_correct_button(CLinestyle,linestyle);
}
void
GC_change_capstyle(int capstyle, Boolean feedback)
{
X.gcv.cap_style = capstyle;
XChangeGC(X.dpy,X.gc,GCCapStyle,&X.gcv);
if (feedback) select_correct_button(CCapstyle,capstyle);
}
void
GC_change_joinstyle(int joinstyle, Boolean feedback)
{
X.gcv.join_style = joinstyle;
XChangeGC(X.dpy,X.gc,GCJoinStyle,&X.gcv);
if (feedback) select_correct_button(CJoinstyle,joinstyle);
}
void
GC_change_fillstyle(int fillstyle, Boolean feedback)
{
XSetFillStyle(X.dpy,X.gc,fillstyle);
X.gcv.fill_style = fillstyle;
if (feedback) select_correct_button(CFillstyle,fillstyle);
}
void
GC_change_fillrule(int fillrule, Boolean feedback)
{
XSetFillRule(X.dpy,X.gc,fillrule);
X.gcv.fill_rule = fillrule;
if (feedback) select_correct_button(CFillrule,fillrule);
}
void
GC_change_arcmode(int arcmode, Boolean feedback)
{
XSetArcMode(X.dpy,X.gc,arcmode);
X.gcv.arc_mode = arcmode;
if (feedback) select_correct_button(CArcmode,arcmode);
}
/* GC_change_dashlist(dashlist)
** ----------------------------
** Now this one's a bit tricky. dashlist gets passed in as an int, but we
** want to change it to an array of chars, like the GC likes it.
** For example:
** 119 => XXX_XXX_ => [3,1,3,1]
*/
void
GC_change_dashlist(int dashlist, Boolean feedback)
{
char dasharray[DASHLENGTH]; /* what we're gonna pass to XSetDashes */
int dashnumber = 0; /* which element of dasharray we're currently
modifying */
int i; /* which bit of the dashlist we're on */
int state = 1; /* whether the list bit we checked was
on (1) or off (0) */
/* Initialize the dasharray */
for (i = 0; i < DASHLENGTH; ++i) dasharray[i] = 0;
if (dashlist == 0) return; /* having no dashes at all is bogus */
/* XSetDashes expects the dashlist to start with an on bit, so if it
** doesn't, we keep on rotating it until it does */
while (!(dashlist&1)) dashlist /= 2;
/* Go through all the bits in dashlist, and update the dasharray
** accordingly */
for (i = 0; i < DASHLENGTH; ++i) {
/* the following if statements checks to see if the bit we're looking
** at as the same on or offness as the one before it (state). If
** so, we increment the length of the current dash. */
if (((dashlist&1<<i) && state) || (!(dashlist&1<<i) && !state))
++dasharray[dashnumber];
else {
state = state^1; /* reverse the state */
++dasharray[++dashnumber]; /* start a new dash */
}
}
XSetDashes(X.dpy,X.gc,0,dasharray,dashnumber+1);
X.gcv.dashes = dashlist;
if (feedback) update_dashlist(dashlist);
}
void
GC_change_planemask(unsigned long planemask, Boolean feedback)
{
XSetPlaneMask(X.dpy,X.gc,planemask);
X.gcv.plane_mask = planemask;
if (feedback) update_planemask((long)planemask);
}
void
change_test(int test, Boolean feedback)
{
X.test = test;
if (feedback) select_button(testchoicedesc,test);
}
void
GC_change_font(char *str, Boolean feedback)
{
int num_fonts; /* number of fonts that match the string */
XListFonts(X.dpy,str,1,&num_fonts); /* see if the font exists */
if (num_fonts) {
XSetFont(X.dpy,X.gc,XLoadFont(X.dpy,str));
if (feedback) change_text(fonttext,str);
}
}
void
change_percent(int percent, Boolean feedback)
{
/* Make sure that percent is valid */
if (percent < 1 || percent > 100) return;
X.percent = (float) percent / 100.0;
if (feedback) update_slider(percent);
}