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Improve bidi handling in entry editor.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-01-16 13:41:16 +01:00
parent 4542e71b8b
commit 34f71cb866
8 changed files with 453 additions and 267 deletions
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22
include/grub/unicode.h
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@ -139,6 +139,7 @@ struct grub_unicode_glyph
grub_uint16_t variant:9;
grub_uint8_t attributes:5;
grub_size_t ncomb;
grub_size_t orig_pos;
struct grub_unicode_combining {
grub_uint32_t code;
enum grub_comb_type type;
@ -186,6 +187,13 @@ enum
GRUB_UNICODE_THAANA_SUKUN = 0x07b0,
GRUB_UNICODE_ZWNJ = 0x200c,
GRUB_UNICODE_ZWJ = 0x200d,
GRUB_UNICODE_LRM = 0x200e,
GRUB_UNICODE_RLM = 0x200f,
GRUB_UNICODE_LRE = 0x202a,
GRUB_UNICODE_RLE = 0x202b,
GRUB_UNICODE_PDF = 0x202c,
GRUB_UNICODE_LRO = 0x202d,
GRUB_UNICODE_RLO = 0x202e,
GRUB_UNICODE_LEFTARROW = 0x2190,
GRUB_UNICODE_UPARROW = 0x2191,
GRUB_UNICODE_RIGHTARROW = 0x2192,
@ -222,13 +230,21 @@ extern struct grub_unicode_bidi_pair grub_unicode_bidi_pairs[];
/* Unicode mandates an arbitrary limit. */
#define GRUB_BIDI_MAX_EXPLICIT_LEVEL 61
struct grub_term_pos
{
unsigned valid:1;
unsigned x:15, y:16;
};
grub_ssize_t
grub_bidi_logical_to_visual (const grub_uint32_t *logical,
grub_size_t logical_len,
struct grub_unicode_glyph **visual_out,
grub_ssize_t (*getcharwidth) (const struct grub_unicode_glyph *visual),
grub_size_t max_width,
grub_size_t start_width);
grub_size_t start_width, grub_uint32_t codechar,
struct grub_term_pos *pos,
int primitive_wrap);
enum grub_comb_type
grub_unicode_get_comb_type (grub_uint32_t c);
@ -275,4 +291,8 @@ grub_unicode_mirror_code (grub_uint32_t in);
grub_uint32_t
grub_unicode_shape_code (grub_uint32_t in, grub_uint8_t attr);
const grub_uint32_t *
grub_unicode_get_comb_end (const grub_uint32_t *end,
const grub_uint32_t *cur);
#endif