[gtk] cssparser: Add gtk_css_parser_try_at_keyword()

[Benjamin Otte <otte src gnome org>]

commit e7b9ecc99ad836fd5eaf4903c30c570f6c9e8c39
Author: Benjamin Otte <otte redhat com>
Date:   Tue Apr 2 00:21:02 2019 +0200

    cssparser: Add gtk_css_parser_try_at_keyword()

 gtk/gtkcssparser.c        | 22 ++++++++++++++++++++++
 gtk/gtkcssparserprivate.h |  2 ++
 gtk/gtkcssprovider.c      |  6 +++---
 3 files changed, 27 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkcssparser.c b/gtk/gtkcssparser.c
index c9412e26bf..774b1dbdfa 100644
--- a/gtk/gtkcssparser.c
+++ b/gtk/gtkcssparser.c
@@ -276,6 +276,28 @@ _gtk_css_parser_try (GtkCssParser *parser,
   return TRUE;
 }
 
+gboolean
+gtk_css_parser_try_at_keyword (GtkCssParser *parser,
+                               const char   *keyword)
+{
+  gsize len;
+
+  g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
+  g_return_val_if_fail (keyword != NULL, FALSE);
+
+  len = strlen (keyword);
+
+  if (parser->data[0] != '@' ||
+      g_ascii_strncasecmp (&parser->data[1], keyword, len) != 0)
+    return FALSE;
+
+  parser->data += len + 1;
+
+  _gtk_css_parser_skip_whitespace (parser);
+
+  return TRUE;
+}
+
 gboolean
 gtk_css_parser_try_ident (GtkCssParser *parser,
                           const char   *ident)
diff --git a/gtk/gtkcssparserprivate.h b/gtk/gtkcssparserprivate.h
index 1611dea07c..1a77c58cd3 100644
--- a/gtk/gtkcssparserprivate.h
+++ b/gtk/gtkcssparserprivate.h
@@ -79,6 +79,8 @@ gboolean        gtk_css_parser_has_function       (GtkCssParser          *parser
  */
 gboolean        gtk_css_parser_try_ident          (GtkCssParser          *parser,
                                                    const char            *ident);
+gboolean        gtk_css_parser_try_at_keyword     (GtkCssParser          *parser,
+                                                   const char            *keyword);
 gboolean        gtk_css_parser_try_token          (GtkCssParser          *parser,
                                                    GtkCssTokenType        token_type);
 gboolean        _gtk_css_parser_try               (GtkCssParser          *parser,
diff --git a/gtk/gtkcssprovider.c b/gtk/gtkcssprovider.c
index 3658b18d1e..f7a611d369 100644
--- a/gtk/gtkcssprovider.c
+++ b/gtk/gtkcssprovider.c
@@ -776,7 +776,7 @@ parse_import (GtkCssScanner *scanner)
 
   gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_IMPORT);
 
-  if (!_gtk_css_parser_try (scanner->parser, "@import", TRUE))
+  if (!gtk_css_parser_try_at_keyword (scanner->parser, "import"))
     {
       gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_IMPORT);
       return FALSE;
@@ -843,7 +843,7 @@ parse_color_definition (GtkCssScanner *scanner)
 
   gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
 
-  if (!_gtk_css_parser_try (scanner->parser, "@define-color", TRUE))
+  if (!gtk_css_parser_try_at_keyword (scanner->parser, "define-color"))
     {
       gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
       return FALSE;
@@ -901,7 +901,7 @@ parse_keyframes (GtkCssScanner *scanner)
 
   gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_KEYFRAMES);
 
-  if (!_gtk_css_parser_try (scanner->parser, "@keyframes", TRUE))
+  if (!gtk_css_parser_try_at_keyword (scanner->parser, "keyframes"))
     {
       gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_KEYFRAMES);
       return FALSE;