3 files changed, 95 insertions, 1 deletions
diff --git a/src/utils/local.mk b/src/utils/local.mk
index 51cddac..02c0970 100644
--- a/src/utils/local.mk
+++ b/src/utils/local.mk
@@ -1,4 +1,5 @@
 marquee_SOURCES += \
 	%reldir%/html.c \
 	%reldir%/resources.c \
-	%reldir%/string.c
+	%reldir%/string.c \
+	%reldir%/svg.c
diff --git a/src/utils/svg.c b/src/utils/svg.c
new file mode 100644
index 0000000..b52a4f6
--- /dev/null
+++ b/src/utils/svg.c
@@ -0,0 +1,65 @@
+/*
+ * SVG coloring
+ *
+ * Copyright (C) 2017  Patrick McDermott
+ *
+ * This file is part of Marquee.
+ *
+ * Marquee is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Marquee is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Marquee.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "svg.h"
+
+#include <string.h>
+
+#include <glib.h>
+
+gboolean
+mq_svg_is_color_valid(const gchar *color)
+{
+	gsize i;
+
+	if (color[0] != '#') {
+		return FALSE;
+	}
+	for (i = 1; i <= 6; ++i) {
+		if (!g_ascii_isxdigit(color[i])) {
+			return FALSE;
+		}
+	}
+	if (color[7] != '\0') {
+		return FALSE;
+	}
+	return TRUE;
+}
+
+gchar *
+mq_svg_set_color(const gchar *svg, const gchar *color)
+{
+	gchar *colored_svg;
+	gchar *occurrence;
+	gsize  i;
+
+	colored_svg = g_strdup(svg);
+
+	occurrence = colored_svg;
+	while ((occurrence = strstr(occurrence, "@COLOR@"))) {
+		for (i = 0; i < 7; ++i) {
+			occurrence[i] = color[i];
+		}
+		occurrence += i;
+	}
+
+	return colored_svg;
+}
diff --git a/src/utils/svg.h b/src/utils/svg.h
new file mode 100644
index 0000000..b0c2c4d
--- /dev/null
+++ b/src/utils/svg.h
@@ -0,0 +1,28 @@
+/*
+ * SVG coloring
+ *
+ * Copyright (C) 2017  Patrick McDermott
+ *
+ * This file is part of Marquee.
+ *
+ * Marquee is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Marquee is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Marquee.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <glib.h>
+
+gboolean
+mq_svg_is_color_valid(const gchar *color) G_GNUC_PURE;
+
+gchar *
+mq_svg_set_color(const gchar *svg, const gchar *color);