Bug 515432 – Add function to get bidirectional character type of a

2008-04-21  Behdad Esfahbod  <behdad@gnome.org>

        Bug 515432 – Add function to get bidirectional character type of a
        unicode character
        Patch from Jürg Billeter

        * docs/pango-sections.txt:
        * docs/tmpl/layout.sgml:
        * docs/tmpl/main.sgml:
        * docs/tmpl/pangocairo.sgml:
        * pango/Makefile.am:
        * pango/pango-bidi-type.c (pango_bidi_type_for_unichar):
        * pango/pango-bidi-type.h:
        * pango/pango-types.h:
        * pango/pango-utils.c (pango_log2vis_get_embedding_levels),
        (pango_unichar_direction):
        * pango/pango.def:
        * pango/pango.h:
        New public API:

                enum PangoBidiType;
                pango_bidi_type_get_type()
                pango_bidi_type_for_unichar()


svn path=/trunk/; revision=2607

1 files changed, 88 insertions, 0 deletions

diff --git a/pango/pango-bidi-type.h b/pango/pango-bidi-type.h
new file mode 100644
index 00000000..a86dd587
--- /dev/null
+++ b/pango/pango-bidi-type.h
@@ -0,0 +1,88 @@
+/* Pango
+ * pango-bidi-type.h: Bidirectional Character Types
+ *
+ * Copyright (C) 2008 Jürg Billeter <j@bitron.ch>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __PANGO_BIDI_TYPE_H__
+#define __PANGO_BIDI_TYPE_H__
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+/**
+ * PangoBidiType:
+ * @PANGO_BIDI_TYPE_L: Left-to-Right
+ * @PANGO_BIDI_TYPE_LRE: Left-to-Right Embedding
+ * @PANGO_BIDI_TYPE_LRO: Left-to-Right Override
+ * @PANGO_BIDI_TYPE_R: Right-to-Left
+ * @PANGO_BIDI_TYPE_AL: Right-to-Left Arabic
+ * @PANGO_BIDI_TYPE_RLE: Right-to-Left Embedding
+ * @PANGO_BIDI_TYPE_RLO: Right-to-Left Override
+ * @PANGO_BIDI_TYPE_PDF: Pop Directional Format
+ * @PANGO_BIDI_TYPE_EN: European Number
+ * @PANGO_BIDI_TYPE_ES: European Number Separator
+ * @PANGO_BIDI_TYPE_ET: European Number Terminator
+ * @PANGO_BIDI_TYPE_AN: Arabic Number
+ * @PANGO_BIDI_TYPE_CS: Common Number Separator
+ * @PANGO_BIDI_TYPE_NSM: Nonspacing Mark
+ * @PANGO_BIDI_TYPE_BN: Boundary Neutral
+ * @PANGO_BIDI_TYPE_B: Paragraph Separator
+ * @PANGO_BIDI_TYPE_S: Segment Separator
+ * @PANGO_BIDI_TYPE_WS: Whitespace
+ * @PANGO_BIDI_TYPE_ON: Other Neutrals
+ *
+ * The #PangoBidiType type represents the bidirectional character
+ * type of a Unicode character as specified by the
+ * <ulink url="http://www.unicode.org/reports/tr9/">Unicode bidirectional algorithm</ulink>.
+ *
+ * Since: 1.22
+ **/
+typedef enum {
+  /* Strong types */
+  PANGO_BIDI_TYPE_L,
+  PANGO_BIDI_TYPE_LRE,
+  PANGO_BIDI_TYPE_LRO,
+  PANGO_BIDI_TYPE_R,
+  PANGO_BIDI_TYPE_AL,
+  PANGO_BIDI_TYPE_RLE,
+  PANGO_BIDI_TYPE_RLO,
+
+  /* Weak types */
+  PANGO_BIDI_TYPE_PDF,
+  PANGO_BIDI_TYPE_EN,
+  PANGO_BIDI_TYPE_ES,
+  PANGO_BIDI_TYPE_ET,
+  PANGO_BIDI_TYPE_AN,
+  PANGO_BIDI_TYPE_CS,
+  PANGO_BIDI_TYPE_NSM,
+  PANGO_BIDI_TYPE_BN,
+
+  /* Neutral types */
+  PANGO_BIDI_TYPE_B,
+  PANGO_BIDI_TYPE_S,
+  PANGO_BIDI_TYPE_WS,
+  PANGO_BIDI_TYPE_ON
+} PangoBidiType;
+
+PangoBidiType pango_bidi_type_for_unichar (gunichar ch) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* __PANGO_BIDI_TYPE_H__ */