Add Lao support to Thai module. (#156781)

2004-11-28  Theppitak Karoonboonyanan  <thep@linux.thai.net>

	Add Lao support to Thai module. (#156781)

	* modules/thai/Makefile.am modules/thai/thai-shaper.[ch]
	+modules/thai/thai-charprop.[ch]: Split WTT tables into a separate
	source. Extend the tables for Lao. 3 new classes are added (AM for
	SaraAm, AD4 for Nikkhahit, BCON for Lao semivowels). Now the range
	0x00-0x7f in TIS is used to store Lao characters. Rewrite ucs2tis()
	et al macros accordingly.

	* modules/thai/thai-shaper.c (get_next_cluster): Rewrite the
	clusterization code, so it's not specific to Thai-English texts. (Note
	that the special case of SaraAm is now handled by the new WTT character
	class. So, the extra checks are now eliminated.)

	* modules/thai/thai-shaper.c (get_glyphs_list, add_cluster):
	Add glyph calculation for Lao clusters.

	* modules/thai/thai-shaper.c (ThaiShapeTable structs,
	get_adjusted_glyphs_list): Generalize the shaping maps according to
	the new 8-bit internal encoding scheme. Now the character ranges are
	relocatable rather than hard-coded.  Add Lao shaping table.

	* modules/thai/thai-shaper.c (get_adjusted_glyphs_list): Add special
	case for Lao, where clusters can be longer than those of Thai.

	* modules/thai/thai-fc.c (get_glyph_index_tis): Add Lao glyphs lookup.

	* modules/thai/thai-ot.c (thai_ot_shape, +lao_ot_get_ruleset): Add Lao
	OT rulesets retrieval.

	* modules/thai/thai-fc.c (PangoEngineScriptInfo thai_scripts[]):
	Add Lao script entry.

1 files changed, 138 insertions, 0 deletions

diff --git a/modules/thai/thai-charprop.c b/modules/thai/thai-charprop.c
new file mode 100644
index 00000000..a9f7a056
--- /dev/null
+++ b/modules/thai/thai-charprop.c
@@ -0,0 +1,138 @@
+#include "thai-charprop.h"
+
+const gshort thai_char_type[256] = {
+  /*       0,   1,   2,   3,   4,   5,   6,   7,
+           8,   9,   A,   B,   C,   D,   E,   F  */
+
+         /* CL1 */
+  /*00*/ _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+         _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+  /*10*/ _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+         _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+
+         /* Lao zone: [U+0E80..U+0EDF] */
+  /*20*/ _ND, _NC, _NC, _ND, _NC, _ND, _ND, _NC,
+         _NC, _ND, _NC, _ND, _ND, _NC, _ND, _ND,
+  /*30*/ _ND, _ND, _ND, _ND, _NC, _NC, _NC, _NC,
+         _ND, _NC, _NC, _UC, _NC, _UC, _NC, _UC,
+  /*40*/ _ND, _NC, _UC, _NC, _ND, _NC, _ND, _NC,
+         _ND, _ND, _NC, _NC, _ND, _NC, _NC, _ND,
+  /*50*/ _ND, _AV, _ND, _AM, _AV, _AV, _AV, _AV,
+         _BV, _BV, _ND, _AV, _BD, _NC, _ND, _ND,
+  /*60*/ _ND, _ND, _ND, _ND, _ND, _ND, _ND, _AD,
+         _TN, _TN, _TN, _TN, _AD, _AD, _ND, _ND,
+  /*70*/ _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+         _ND, _ND, _ND, _ND, _NC, _NC, _ND, _ND,
+
+         /* CL2 */
+  /*80*/ _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+         _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+  /*90*/ _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+         _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+
+         /* Thai zone: [U+0E00..U+0E5F] */
+  /*A0*/ _ND, _NC, _NC, _NC, _NC, _NC, _NC, _NC,
+         _NC, _NC, _NC, _NC, _NC, _SC, _BC, _BC,
+  /*B0*/ _SC, _NC, _NC, _NC, _NC, _NC, _NC, _NC,
+         _NC, _NC, _NC, _UC, _NC, _UC, _NC, _UC,
+  /*C0*/ _NC, _NC, _NC, _NC, _ND, _NC, _ND, _NC,
+         _NC, _NC, _NC, _NC, _UC, _NC, _NC, _ND,
+  /*D0*/ _ND, _AV, _ND, _AM, _AV, _AV, _AV, _AV,
+         _BV, _BV, _BD, _ND, _ND, _ND, _ND, _ND,
+  /*E0*/ _ND, _ND, _ND, _ND, _ND, _ND, _ND, _AD,
+         _TN, _TN, _TN, _TN, _AD, _AD, _AD, _ND,
+  /*F0*/ _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+         _ND, _ND, _ND, _ND, _ND, _ND, _ND, _ND,
+};
+
+const gshort thai_TAC_char_class[256] = {
+  /*	   0,   1,   2,   3,   4,   5,   6,   7,
+           8,   9,   A,   B,   C,   D,   E,   F  */
+
+         /* CL1 */
+  /*00*/ CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,
+         CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,
+  /*10*/ CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,
+         CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,
+
+         /* Lao zone: [U+0E80..U+0EDF] */
+  /*20*/  NON,CONS,CONS, NON,CONS, NON, NON,CONS,
+         CONS, NON,CONS, NON, NON,CONS, NON, NON,
+  /*30*/  NON, NON, NON, NON,CONS,CONS,CONS,CONS,
+          NON,CONS,CONS,CONS,CONS,CONS,CONS,CONS,
+  /*40*/  NON,CONS,CONS,CONS, NON,CONS, NON,CONS,
+          NON, NON,CONS,CONS, NON,CONS,CONS, NON,
+  /*50*/  FV1, AV2, FV1,  AM, AV1, AV3, AV2, AV3,
+          BV1, BV2, NON, AV2,BCON, FV3, NON, NON,
+  /*60*/   LV,  LV,  LV,  LV,  LV, NON, NON, NON,
+         TONE,TONE,TONE,TONE, AD1, AD4, NON, NON,
+  /*70*/  NON, NON, NON, NON, NON, NON, NON, NON,
+          NON, NON, NON, NON,CONS,CONS, NON,CTRL,
+
+         /* CL2 */
+  /*80*/ CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,
+         CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,
+  /*90*/ CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,
+         CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,CTRL,
+
+         /* Thai zone: [U+0E00..U+0E5F] */
+  /*A0*/  NON,CONS,CONS,CONS,CONS,CONS,CONS,CONS,
+         CONS,CONS,CONS,CONS,CONS,CONS,CONS,CONS,
+  /*B0*/ CONS,CONS,CONS,CONS,CONS,CONS,CONS,CONS,
+         CONS,CONS,CONS,CONS,CONS,CONS,CONS,CONS,
+  /*C0*/ CONS,CONS,CONS,CONS, FV3,CONS, FV3,CONS,
+         CONS,CONS,CONS,CONS,CONS,CONS,CONS, NON,
+  /*D0*/  FV1, AV2, FV1,  AM, AV1, AV3, AV2, AV3,
+          BV1, BV2,  BD, NON, NON, NON, NON, NON,
+  /*E0*/   LV,  LV,  LV,  LV,  LV, FV2, NON, AD2,
+         TONE,TONE,TONE,TONE, AD1, AD4, AD3, NON,
+  /*F0*/  NON, NON, NON, NON, NON, NON, NON, NON,
+          NON, NON, NON, NON, NON, NON, NON,CTRL,
+};
+
+const gchar thai_TAC_compose_input[20][20] = {
+      /* row: Cn-1,  column: Cn */
+      /*CTRL NON CONS LV FV1 FV2 FV3  AM BV1 BV2
+       * BD TONE AD1 AD2 AD3 AD4 AV1 AV2 AV3 BCON*/
+/*CTRL*/{'X','A','A','A','A','A','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*NON */{'X','A','A','A','S','S','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*CONS*/{'X','A','A','A','A','S','A','C','C','C',
+         'C','C','C','C','C','C','C','C','C','C'},
+/*LV  */{'X','S','A','S','S','S','S','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*FV1 */{'X','A','A','A','A','S','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*FV2 */{'X','A','A','A','A','S','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*FV3 */{'X','A','A','A','S','A','S','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*AM  */{'X','A','A','A','S','S','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*BV1 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','C','C','R','R','C','R','R','R','R'},
+/*BV2 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','C','R','R','R','R','R','R','R','R'},
+/*BD  */{'X','A','A','A','S','S','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*TONE*/{'X','A','A','A','A','A','A','C','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*AD1 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*AD2 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*AD3 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','R','R','R','R','R','R','R','R','R'},
+/*AD4 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','C','R','R','R','R','R','R','R','R'},
+/*AV1 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','C','C','R','R','C','R','R','R','R'},
+/*AV2 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','C','R','R','R','R','R','R','R','R'},
+/*AV3 */{'X','A','A','A','S','S','A','R','R','R',
+         'R','C','R','C','R','R','R','R','R','R'},
+/*BCON*/{'X','A','A','A','A','S','A','C','C','C',
+         'R','C','R','R','R','C','C','C','C','R'},
+};
+