From 8a4d88a3ce54ecd6692d66733540fe3dfa957147 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <pj@pehjota.net>
Date: Sat, 07 Oct 2017 13:16:50 -0400
Subject: mq_html_input_select(): New function

---
(limited to 'src')

diff --git a/src/html.c b/src/html.c
index fae9dca..e8f8e4c 100644
--- a/src/html.c
+++ b/src/html.c
@@ -604,3 +604,78 @@ mq_html_input_checkbox(const gchar *name, const gchar *label, gboolean checked)
 		name, label, name, name, name,
 		checked ? " checked=\"checked\"" : "");
 }
+
+gchar *
+mq_html_input_select(const gchar *name, const gchar *label,
+	const gchar *selected,
+	GDestroyNotify destroy_value, GDestroyNotify destroy_label, ...)
+{
+	gsize    len;
+	va_list  ap;
+	gchar   *option_value;
+	gchar   *option_label;
+	gchar   *select;
+	gchar   *ptr;
+
+	g_assert(selected && selected[0]);  /* Would cause buffer overflow */
+
+	/* Calculate length. */
+	len = strlen("<label for=\"");
+	len += strlen(name);
+	len += strlen("\">\n<span>");
+	len += strlen(label);
+	len += strlen("</span>\n<select name=\"");
+	len += strlen(name);
+	len += strlen("\" id=\"");
+	len += strlen(name);
+	len += strlen("\">\n");
+	va_start(ap, destroy_label);
+	while ((option_value = va_arg(ap, gchar *)) && (option_label =
+				va_arg(ap, gchar *))) {
+		len += strlen("<option value=\"");
+		len += strlen(option_value);
+		len += strlen("\"");
+		len += strlen(">");
+		len += strlen(option_label);
+		len += strlen("</option>\n");
+	}
+	va_end(ap);
+	len += strlen(" selected=\"selected\"");
+	len += strlen("</select>\n</label>\n");
+	++len;  /* NUL byte */
+
+	/* Build string. */
+	select = g_new(gchar, len);
+	ptr = g_stpcpy(select, "<label for=\"");
+	ptr = g_stpcpy(ptr, name);
+	ptr = g_stpcpy(ptr, "\">\n<span>");
+	ptr = g_stpcpy(ptr, label);
+	ptr = g_stpcpy(ptr, "</span>\n<select name=\"");
+	ptr = g_stpcpy(ptr, name);
+	ptr = g_stpcpy(ptr, "\" id=\"");
+	ptr = g_stpcpy(ptr, name);
+	ptr = g_stpcpy(ptr, "\">\n");
+	va_start(ap, destroy_label);
+	while ((option_value = va_arg(ap, gchar *)) && (option_label =
+				va_arg(ap, gchar *))) {
+		ptr = g_stpcpy(ptr, "<option value=\"");
+		ptr = g_stpcpy(ptr, option_value);
+		ptr = g_stpcpy(ptr, "\"");
+		if (g_strcmp0(option_value, selected) == 0) {
+			ptr = g_stpcpy(ptr, " selected=\"selected\"");
+		}
+		ptr = g_stpcpy(ptr, ">");
+		ptr = g_stpcpy(ptr, option_label);
+		if (destroy_value) {
+			destroy_value(option_value);
+		}
+		if (destroy_label) {
+			destroy_label(option_label);
+		}
+		ptr = g_stpcpy(ptr, "</option>\n");
+	}
+	va_end(ap);
+	ptr = g_stpcpy(ptr, "</select>\n</label>\n");  /* g_stpcpy() adds NUL */
+
+	return select;
+}
diff --git a/src/html.h b/src/html.h
index 24deb8a..6fe35a8 100644
--- a/src/html.h
+++ b/src/html.h
@@ -71,4 +71,9 @@ mq_html_input_radio(const gchar *name, const gchar *label, gboolean checked);
 gchar *
 mq_html_input_checkbox(const gchar *name, const gchar *label, gboolean checked);
 
+gchar *
+mq_html_input_select(const gchar *name, const gchar *label,
+	const gchar *selected,
+	GDestroyNotify destroy_value, GDestroyNotify destroy_label, ...);
+
 #endif
--
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