From cf87db164aa2401ec33a041d3969d6ccb1ef49d9 Mon Sep 17 00:00:00 2001
From: Matthieu Herrb <matthieu@cvs.openbsd.org>
Date: Sat, 25 Nov 2006 20:52:24 +0000
Subject: Importing from X.Org 7.2RC2

---
 app/xgc/interpret.c | 348 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 348 insertions(+)
 create mode 100644 app/xgc/interpret.c

(limited to 'app/xgc/interpret.c')

diff --git a/app/xgc/interpret.c b/app/xgc/interpret.c
new file mode 100644
index 000000000..9b05c55fb
--- /dev/null
+++ b/app/xgc/interpret.c
@@ -0,0 +1,348 @@
+/*
+** interpret.c
+**
+** interprets and executes lines in the Xgc syntax.
+*/
+/* $XFree86: xc/programs/xgc/interpret.c,v 1.4 2002/01/07 20:38:30 dawes Exp $ */
+
+#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);
+}
-- 
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