Start working on it

1 files changed, 60 insertions, 0 deletions

diff --git a/props.c b/props.c
new file mode 100644
index 0000000..40ebcdd
--- /dev/null
+++ b/props.c
@@ -0,0 +1,60 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+
+#include "guifs.h"
+
+#define Eparse "could not parse property"
+
+PropVal
+defbackground(void)
+{
+	PropVal v;
+	v.colour = mkcolour(DBlack);
+	return v;
+}
+
+char *
+printcolour(PropVal p)
+{
+	int bufsize = 64;
+	char *buf = emalloc(bufsize);
+	snprint(buf, bufsize, "%08ulX\n", p.colour->code);
+	return buf;
+}
+
+char *
+parsecolour(char *str, PropVal *p)
+{
+	char *r;
+	ulong c = strtoul(str, &r, 16);
+	if((r - str) != 8)
+		return Eparse;
+	(*p).colour = mkcolour(c);
+	return nil;
+}
+
+PropVal
+getprop(GuiElement *g, int tag)
+{
+	for(int i = 0; i < g->nprops; i++)
+		if(g->props[i].tag == tag)
+			return g->props[i].val;
+	sysfatal("invalid prop for this gui element");
+}
+
+void
+setprop(GuiElement *g, int tag, PropVal val)
+{
+	/* TODO: free old propval */
+	for(int i = 0; i < g->nprops; i++)
+		if(g->props[i].tag == tag){
+			g->props[i].val = val;
+			updategui(0);
+			return;
+		}
+}
+
+PropSpec propspecs[Pmax] = {
+	[Pbackground] = {"background",	defbackground,	printcolour,	parsecolour},
+};
\ No newline at end of file