[modules] Move language modules in source tree and remove modules/

This should complete the kill-modules effort.  What is left is leftover
removal and unbreaking stuff.

Bug 733882 - Kill Pango modules, engines, and config files

1 files changed, 91 insertions, 0 deletions

diff --git a/pango/break-arabic.c b/pango/break-arabic.c
new file mode 100644
index 00000000..5e2f6068
--- /dev/null
+++ b/pango/break-arabic.c
@@ -0,0 +1,91 @@
+/* Pango
+ * break-arabic.c:
+ *
+ * Copyright (C) 2006 Red Hat Software
+ * Copyright (C) 2006 Sharif FarsiWeb, Inc.
+ * Authors: Behdad Esfahbod <besfahbo@redhat.com>
+ *          Roozbeh Pournader <roozbeh@farsiweb.info>
+ *
+ * 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.
+ */
+
+#include "config.h"
+
+#include "pango-break.h"
+
+#define ALEF_WITH_MADDA_ABOVE	0x0622
+#define YEH_WITH_HAMZA_ABOVE	0x0626
+#define ALEF			0x0627
+#define WAW			0x0648
+#define YEH			0x064A
+
+#define MADDAH_ABOVE		0x0653
+#define HAMZA_ABOVE		0x0654
+#define HAMZA_BELOW		0x0655
+
+/*
+ * Arabic characters with canonical decompositions that are not just
+ * ligatures.  The characters U+06C0, U+06C2, and U+06D3 are intentionally
+ * excluded as they are marked as "not an independent letter" in Unicode
+ * Character Database's NamesList.txt
+ */
+#define IS_COMPOSITE(c) (ALEF_WITH_MADDA_ABOVE <= (c) && (c) <= YEH_WITH_HAMZA_ABOVE)
+
+/* If a character is the second part of a composite Arabic character with an Alef */
+#define IS_COMPOSITE_WITH_ALEF(c) (MADDAH_ABOVE <= (c) && (c) <= HAMZA_BELOW)
+
+static void
+break_arabic (const char          *text,
+	      int                  length,
+	      const PangoAnalysis *analysis G_GNUC_UNUSED,
+	      PangoLogAttr        *attrs,
+	      int                  attrs_len G_GNUC_UNUSED)
+{
+  int i;
+  const char *p;
+  gunichar prev_wc, this_wc;
+
+  /* See http://bugzilla.gnome.org/show_bug.cgi?id=350132 for issues this
+   * module tries to solve.
+   */
+
+  for (p = text, i = 0, prev_wc = 0;
+       p < text + length;
+       p = g_utf8_next_char (p), i++, prev_wc = this_wc)
+    {
+      this_wc = g_utf8_get_char (p);
+
+      /*
+       * Unset backspace_deletes_character for various combinations.
+       *
+       * A few more combinations may need to be handled here, but are not
+       * handled yet, as expectations of users is not known or may differ
+       * among different languages or users:
+       * some letters combined with U+0658 ARABIC MARK NOON GHUNNA;
+       * combinations considered one letter in Azerbaijani (WAW+SUKUN and
+       * FARSI_YEH+HAMZA_ABOVE); combinations of YEH and ALEF_MAKSURA with
+       * HAMZA_BELOW (Qur'anic); TATWEEL+HAMZA_ABOVE (Qur'anic).
+       *
+       * FIXME: Ordering these in some other way may lower the time spent here, or not.
+       */
+      if (G_UNLIKELY (
+	   IS_COMPOSITE (this_wc) ||
+	  (prev_wc == ALEF && IS_COMPOSITE_WITH_ALEF (this_wc)) ||
+	  (this_wc == HAMZA_ABOVE && (prev_wc == WAW || prev_wc == YEH))
+	 ))
+	attrs[i+1].backspace_deletes_character = FALSE;
+    }
+}