Adding xresources patch

config.def.h

@@ -162,6 +162,44 @@ static unsigned int mousebg = 0;
  */
 static unsigned int defaultattr = 11;
 
+#if XRESOURCES_PATCH
+/*
+ * Xresources preferences to load at startup
+ */
+ResourcePref resources[] = {
+		{ "font",         STRING,  &font },
+		{ "color0",       STRING,  &colorname[0] },
+		{ "color1",       STRING,  &colorname[1] },
+		{ "color2",       STRING,  &colorname[2] },
+		{ "color3",       STRING,  &colorname[3] },
+		{ "color4",       STRING,  &colorname[4] },
+		{ "color5",       STRING,  &colorname[5] },
+		{ "color6",       STRING,  &colorname[6] },
+		{ "color7",       STRING,  &colorname[7] },
+		{ "color8",       STRING,  &colorname[8] },
+		{ "color9",       STRING,  &colorname[9] },
+		{ "color10",      STRING,  &colorname[10] },
+		{ "color11",      STRING,  &colorname[11] },
+		{ "color12",      STRING,  &colorname[12] },
+		{ "color13",      STRING,  &colorname[13] },
+		{ "color14",      STRING,  &colorname[14] },
+		{ "color15",      STRING,  &colorname[15] },
+		{ "background",   STRING,  &colorname[256] },
+		{ "foreground",   STRING,  &colorname[257] },
+		{ "cursorColor",  STRING,  &colorname[258] },
+		{ "termname",     STRING,  &termname },
+		{ "shell",        STRING,  &shell },
+		{ "xfps",         INTEGER, &xfps },
+		{ "actionfps",    INTEGER, &actionfps },
+		{ "blinktimeout", INTEGER, &blinktimeout },
+		{ "bellvolume",   INTEGER, &bellvolume },
+		{ "tabspaces",    INTEGER, &tabspaces },
+		{ "borderpx",     INTEGER, &borderpx },
+		{ "cwscale",      FLOAT,   &cwscale },
+		{ "chscale",      FLOAT,   &chscale },
+};
+#endif // XRESOURCES_PATCH
+
 /*
  * Internal mouse shortcuts.
  * Beware that overloading Button1 will disable the selection.

patch/x_include.c

@@ -7,3 +7,7 @@
 #if FIXIME_PATCH
 #include "fixime.c"
 #endif
+
+#if XRESOURCES_PATCH
+#include "xresources.c"
+#endif

patch/x_include.h

@@ -7,3 +7,7 @@
 #if FIXIME_PATCH
 #include "fixime.h"
 #endif
+
+#if XRESOURCES_PATCH
+#include "xresources.h"
+#endif

patch/xresources.c

@@ -0,0 +1,52 @@
+int
+resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
+{
+	char **sdst = dst;
+	int *idst = dst;
+	float *fdst = dst;
+
+	char fullname[256];
+	char fullclass[256];
+	char *type;
+	XrmValue ret;
+
+	snprintf(fullname, sizeof(fullname), "%s.%s",
+			opt_name ? opt_name : "st", name);
+	snprintf(fullclass, sizeof(fullclass), "%s.%s",
+			opt_class ? opt_class : "St", name);
+	fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
+
+	XrmGetResource(db, fullname, fullclass, &type, &ret);
+	if (ret.addr == NULL || strncmp("String", type, 64))
+		return 1;
+
+	switch (rtype) {
+	case STRING:
+		*sdst = ret.addr;
+		break;
+	case INTEGER:
+		*idst = strtoul(ret.addr, NULL, 10);
+		break;
+	case FLOAT:
+		*fdst = strtof(ret.addr, NULL);
+		break;
+	}
+	return 0;
+}
+
+void
+config_init(void)
+{
+	char *resm;
+	XrmDatabase db;
+	ResourcePref *p;
+
+	XrmInitialize();
+	resm = XResourceManagerString(xw.dpy);
+	if (!resm)
+		return;
+
+	db = XrmGetStringDatabase(resm);
+	for (p = resources; p < resources + LEN(resources); p++)
+		resource_load(db, p->name, p->type, p->dst);
+}

patch/xresources.h

@@ -0,0 +1,17 @@
+#include <X11/Xresource.h>
+
+/* Xresources preferences */
+enum resource_type {
+	STRING = 0,
+	INTEGER = 1,
+	FLOAT = 2
+};
+
+typedef struct {
+	char *name;
+	enum resource_type type;
+	void *dst;
+} ResourcePref;
+
+int resource_load(XrmDatabase, char *, enum resource_type, void *);
+void config_init(void);

patches.h

@@ -80,3 +80,8 @@
  */
 #define OPENCOPIED_PATCH 1
 
+/* This patch adds the ability to configure st via Xresources. At startup, st will read and
+ * apply the resources named in the resources[] array in config.h.
+ * https://st.suckless.org/patches/xresources/
+ */
+#define XRESOURCES_PATCH 1

x.c

@@ -847,8 +847,13 @@ xclear(int x1, int y1, int x2, int y2)
 void
 xhints(void)
 {
+	#if XRESOURCES_PATCH
+	XClassHint class = {opt_name ? opt_name : "st",
+	                    opt_class ? opt_class : "St"};
+	#else
 	XClassHint class = {opt_name ? opt_name : termname,
 	                    opt_class ? opt_class : termname};
+	#endif // XRESOURCES_PATCH
 	XWMHints wm = {.flags = InputHint, .input = 1};
 	XSizeHints *sizeh;
 
@@ -2157,6 +2162,12 @@ run:
 
 	setlocale(LC_CTYPE, "");
 	XSetLocaleModifiers("");
+	#if XRESOURCES_PATCH
+	if (!(xw.dpy = XOpenDisplay(NULL)))
+		die("Can't open display\n");
+
+	config_init();
+	#endif // XRESOURCES_PATCH
 	cols = MAX(cols, 1);
 	rows = MAX(rows, 1);
 	tnew(cols, rows);