1 files changed, 74 insertions, 0 deletions
diff --git a/gtk/css/gtkcsslocation.c b/gtk/css/gtkcsslocation.c
new file mode 100644
index 0000000000..4f47501b0b
--- /dev/null
+++ b/gtk/css/gtkcsslocation.c
@@ -0,0 +1,74 @@
+/* GSK - The GIMP Toolkit
+ * Copyright (C) 2019 Benjamin Otte <otte@gnome.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "gtkcsslocationprivate.h"
+
+/**
+ * GtkCssLocation:
+ * @bytes: number of bytes parsed since the beginning
+ * @chars: number of characters parsed since the beginning
+ * @lines: number of full lines that have been parsed
+ *     If you want to display this as a line number, you
+ *     need to add 1 to this.
+ * @line_bytes: Number of bytes parsed since the last line break
+ * @line_chars: Number of characters parsed since the last line
+ *     break
+ *
+ * @GtkCssLocation is used to present a location in a file - or other
+ * source of data parsed by the CSS engine.
+ * 
+ * The @bytes and @line_bytes offsets are meant to be used to
+ * programmatically match data. The @lines and @line_chars offsets
+ * can be used for printing the location in a file.
+ *
+ * Note that the @lines parameter starts from 0 and is increased
+ * whenever a CSS line break is encountered. (CSS defines the C character
+ * sequences "\r\n", "\r", "\n" and "\f" as newlines.)
+ * If your document uses different rules for line breaking, you might want
+ * run into problems here.
+ */
+
+void
+gtk_css_location_init (GtkCssLocation *location)
+{
+  memset (location, 0, sizeof (GtkCssLocation));
+}
+
+void
+gtk_css_location_advance (GtkCssLocation *location,
+                          gsize           bytes,
+                          gsize           chars)
+{
+  location->bytes += bytes;
+  location->chars += chars;
+  location->line_bytes += bytes;
+  location->line_chars += chars;
+}
+
+void
+gtk_css_location_advance_newline (GtkCssLocation *location,
+                                  gboolean        is_windows)
+{
+  gtk_css_location_advance (location, is_windows ? 2 : 1, is_windows ? 2 : 1);
+
+  location->lines++;
+  location->line_bytes = 0;
+  location->line_chars = 0;
+}
+