From d9a15e56d42e45f021c01d527df67863100840a7 Mon Sep 17 00:00:00 2001
From: Peter Mikkelsen <petermikkelsen10@gmail.com>
Date: Sat, 17 Feb 2024 16:42:00 +0000
Subject: Implement scroll bar (not clickable yet) and sam-scrolling

---
 props.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 64 insertions(+), 13 deletions(-)

(limited to 'props.c')

diff --git a/props.c b/props.c
index df61782..f31270a 100644
--- a/props.c
+++ b/props.c
@@ -10,6 +10,7 @@
 #include "guifs.h"
 
 #define Eparse "could not parse property"
+#define Eoffset "cannot parse this property when writing at a non-zero offset"
 
 int
 allspace(char *r)
@@ -120,6 +121,17 @@ defmenus(int gtag, int ptag)
 	return v;
 }
 
+PropVal
+defscroll(int gtag, int ptag)
+{
+	USED(gtag);
+	USED(ptag);
+
+	PropVal v;
+	v.scroll = 0;
+	return v;
+}
+
 char *
 printcolour(PropVal p)
 {
@@ -196,20 +208,31 @@ printmenus(PropVal p)
 }
 
 char *
-parsecolour(char *str, PropVal *p)
+printscroll(PropVal p)
 {
+	return smprint("%d\n", p.scroll);
+}
+
+char *
+parsecolour(char *str, int offset, PropVal *p)
+{
+	if(offset != 0)
+		return Eoffset;
+
 	char *r;
 	ulong c = strtoul(str, &r, 16);
 	if((r - str) != 8 || !allspace(r))
 		return Eparse;
-	(*p).colour = mkcolour(c);
+	p->colour = mkcolour(c);
 	return nil;
 }
 
 char *
-parsespacing(char *str, PropVal *p)
+parsespacing(char *str, int offset, PropVal *p)
 {
-	USED(p);
+	if(offset != 0)
+		return Eoffset;
+
 	char *fields[5];
 	int spacings[4];
 
@@ -240,36 +263,50 @@ parsespacing(char *str, PropVal *p)
 		s->left = spacings[3];
 		break;
 	}
-	(*p).spacing = s;
+	p->spacing = s;
 
 	return nil;
 }
 
 char *
-parseorientation(char *str, PropVal *p)
+parseorientation(char *str, int offset, PropVal *p)
 {
+	if(offset != 0)
+		return Eoffset;
+
 	if(strncmp(str, "horizontal", 10) == 0 && allspace(str+10))
-		(*p).orientation = Horizontal;
+		p->orientation = Horizontal;
 	else if(strncmp(str, "vertical", 8) == 0 && allspace(str+8))
-		(*p).orientation = Vertical;
+		p->orientation = Vertical;
 	else
 		return Eparse;
 	return nil;
 }
 
 char *
-parsetext(char *str, PropVal *p)
+parsetext(char *str, int offset, PropVal *p)
 {
-	Rune *rstr = runesmprint("%s", str);
+	char *old = smprint("%S", p->text);
+	long oldlen = strlen(old);
+
+	if(offset > oldlen)
+		return Eparse;
+
+	old[offset] = 0;
+	Rune *rstr = runesmprint("%s%s", old, str);
+	free(old);
 	if(rstr == nil)
 		sysfatal("runesmprint failed");
-	(*p).text = rstr;
+	p->text = rstr;
 	return nil;
 }
 
 char *
-parsemenus(char *str, PropVal *p)
+parsemenus(char *str, int offset, PropVal *p)
 {
+	if(offset != 0)
+		return Eoffset;
+
 	char *err = nil;
 	int n = 0;
 	for(int i = 0; str[i] != 0; i++)
@@ -327,7 +364,6 @@ parsemenus(char *str, PropVal *p)
 			}
 		}
 		spec->menus[which]->item[count] = nil;
-		print("count: %d\n", count);
 	}
 
 Lend:
@@ -335,6 +371,20 @@ Lend:
 	return err;
 }
 
+char *
+parsescroll(char *str, int offset, PropVal *p)
+{
+	if(offset != 0)
+		return Eoffset;
+
+	char *r;
+	ulong s = strtoul(str, &r, 10);
+	if(!allspace(r))
+		return Eparse;
+	p->scroll = (int)s;
+	return nil;
+}
+
 PropVal
 getprop(GuiElement *g, int tag, int lock)
 {
@@ -378,6 +428,7 @@ PropSpec propspecs[Pmax] = {
 	[Ptext] = {"text",	deftext,	printtext,	parsetext},
 	[Ptextcolour] = {"textcolour",	defcolour,	printcolour,	parsecolour},
 	[Pmenus] = {"menus",	defmenus,	printmenus,	parsemenus},
+	[Pscroll] = {"scroll",	defscroll,	printscroll,	parsescroll},
 };
 
 int baseprops[nbaseprops] = {Pbackground, Pborder, Pmargin, Ppadding, Pbordercolour, Pmenus};
\ No newline at end of file
-- 
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