From: ianmdlvl <ianmdlvl>
Date: Sun, 12 Dec 2004 18:06:02 +0000 (+0000)
Subject: x resources and command-line arguments
X-Git-Tag: debian_version_4_0_99_0_12~3
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-utils.git;a=commitdiff_plain;h=004f87de1499fa37d381633dab590558257596bf

x resources and command-line arguments
---

diff --git a/cprogs/xacpi-simple.c b/cprogs/xacpi-simple.c
index be9b2cc..d18624f 100644
--- a/cprogs/xacpi-simple.c
+++ b/cprogs/xacpi-simple.c
@@ -31,6 +31,7 @@
 
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
+#include <X11/Xresource.h>
 
 #define TOP      60
 #define BOTTOM 3600
@@ -308,23 +309,78 @@ static void initacquire(void) {
   chdir_base();
 }  
 
-/*---------- display ----------*/
+/*---------- argument parsing ----------*/
 
 #define COLOURS					\
-  C(dimgrey)					\
-  C(blue)					\
-  C(black)					\
-  C(red)					\
-  C(green)					\
-  C(cyan)					\
-  C(grey)					\
-  C(darkgreen)					\
-  C(yellow)					\
-  C(white)					\
+  C(blue,      discharging)			\
+  C(green,     charging)			\
+  C(cyan,      charged)				\
+  C(grey,      confusing)			\
+  C(black,     normal)				\
+  C(red,       low)				\
+  C(dimgrey,   degraded)			\
+  C(darkgreen, absent)				\
+  C(yellow,    error)				\
+  C(white,     equilibrium)			\
   GC(remain)					\
   GC(white)					\
   GC(empty)
 
+static XrmDatabase xrm;
+
+static const char defaultresources[]=
+#define GC(g)
+#define C(c,u)					\
+  "*" #u "Color: " #c "\n"
+  COLOURS
+#undef GC
+#undef C
+  ;
+
+#define S(s) ((char*)(s))
+static const XrmOptionDescRec optiontable[]= {
+  { S("-display"),      S("*display"),      XrmoptionSepArg },
+  { S("-geometry"),     S("*geometry"),     XrmoptionSepArg },
+#define GC(g)
+#define C(c,u)							\
+  { S("-" #u "Color"),  S("*" #u "Color"),  XrmoptionSepArg },	\
+  { S("-" #u "Colour"), S("*" #u "Color"),  XrmoptionSepArg },
+  COLOURS
+#undef GC
+#undef C
+};
+
+static void parseargs(int argc, char **argv) {
+  XrmInitialize();
+
+  xrm= XrmGetStringDatabase((char*)defaultresources);
+  if (!xrm) fail("xrmgetstringdatabase");
+  
+  XrmParseCommand(&xrm, (XrmOptionDescRec*)optiontable,
+		  sizeof(optiontable)/sizeof(*optiontable),
+		  program_name, &argc, argv);
+
+  /*  if (argc>0) badusage();*/
+} 
+
+static const char *getresource(const char *want) {
+  char name_buf[256], class_buf[256];
+  XrmValue val;
+  char *rep_type_dummy;
+  int r;
+
+  assert(strlen(want) < 128);
+  sprintf(name_buf,"xacpi-simple.%s",want);
+  sprintf(class_buf,"Xacpi-Simple.%s",want);
+  
+  r= XrmGetResource(xrm, name_buf,class_buf, &rep_type_dummy, &val);
+  if (!r) return 0;
+  
+  return val.addr;
+}
+
+/*---------- display ----------*/
+
 static Display *disp;
 static Window win;
 static int width, height;
@@ -337,7 +393,7 @@ typedef struct {
   unsigned long lastfg;
 } Gcstate;
 
-#define C(c) static unsigned long pix_##c;
+#define C(c,u) static unsigned long pix_##c;
 #define GC(g) static Gcstate gc_##g;
   COLOURS
 #undef C
@@ -439,9 +495,13 @@ static void initgc(Gcstate *gc_r) {
   gc_r->gc= XCreateGC(disp,win, GCFunction|GCLineWidth|GCForeground, &gcv);
 }
 
-static void colour(unsigned long *pix_r, const char *name) {
+static void colour(unsigned long *pix_r, const char *whichcolour) {
   XColor xc;
+  const char *name;
   Status st;
+
+  name= getresource(whichcolour);
+  if (!name) fail("get colour resource");
   
   st= XAllocNamedColor(disp,cmap,name,&xc,&xc);
   if (!st) fail(name);
@@ -460,7 +520,7 @@ static void initgraphics(int argc, char **argv) {
   
   program_name_silly= (char*)program_name;
 
-  disp= XOpenDisplay(0);
+  disp= XOpenDisplay(getresource("display"));
   if (!disp) fail("could not open display");
 
   screen= DefaultScreen(disp);
@@ -472,7 +532,7 @@ static void initgraphics(int argc, char **argv) {
   if (!normal_hints || !wm_hints || !class_hint)
     fail("could not alloc hint(s)");
 
-  geom_string= argc>=2 ? argv[1] : 0;
+  geom_string= getresource("geometry");
 
   r= XWMGeometry(disp,screen, geom_string,"128x32", 0,
 		 normal_hints,
@@ -484,7 +544,7 @@ static void initgraphics(int argc, char **argv) {
 			   pos_x,pos_y,width,height,0,0,0);
   cmap= DefaultColormap(disp,screen);
   
-#define C(c) colour(&pix_##c, #c);
+#define C(c,u) colour(&pix_##c, #u "Color");
 #define GC(g) initgc(&gc_##g);
   COLOURS
 #undef C
@@ -558,9 +618,7 @@ static void eventloop(void) {
 }
 
 int main(int argc, char **argv) {
-  if (argc<1 || argc>2)
-    badusage();
-
+  parseargs(argc,argv);
   initacquire();
   initgraphics(argc,argv);
   eventloop();