mirror of
git://source.winehq.org/git/wine.git
synced 2024-09-01 14:47:44 +00:00
1107 lines
34 KiB
C
1107 lines
34 KiB
C
/*
|
|
* Unicode Bidirectional Algorithm implementation
|
|
*
|
|
* Copyright 2003 Shachar Shemesh
|
|
* Copyright 2007 Maarten Lankhorst
|
|
* Copyright 2010 CodeWeavers, Aric Stewart
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*
|
|
* Code derived from the modified reference implementation
|
|
* that was found in revision 17 of http://unicode.org/reports/tr9/
|
|
* "Unicode Standard Annex #9: THE BIDIRECTIONAL ALGORITHM"
|
|
*
|
|
* -- Copyright (C) 1999-2005, ASMUS, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of the Unicode data files and any associated documentation (the
|
|
* "Data Files") or Unicode software and any associated documentation (the
|
|
* "Software") to deal in the Data Files or Software without restriction,
|
|
* including without limitation the rights to use, copy, modify, merge,
|
|
* publish, distribute, and/or sell copies of the Data Files or Software,
|
|
* and to permit persons to whom the Data Files or Software are furnished
|
|
* to do so, provided that (a) the above copyright notice(s) and this
|
|
* permission notice appear with all copies of the Data Files or Software,
|
|
* (b) both the above copyright notice(s) and this permission notice appear
|
|
* in associated documentation, and (c) there is clear notice in each
|
|
* modified Data File or in the Software as well as in the documentation
|
|
* associated with the Data File(s) or Software that the data or software
|
|
* has been modified.
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
|
|
#include "windef.h"
|
|
#include "winbase.h"
|
|
#include "wine/debug.h"
|
|
|
|
#include "dwrite_private.h"
|
|
|
|
WINE_DEFAULT_DEBUG_CHANNEL(bidi);
|
|
|
|
extern const unsigned short bidi_bracket_table[] DECLSPEC_HIDDEN;
|
|
extern const unsigned short bidi_direction_table[] DECLSPEC_HIDDEN;
|
|
|
|
#define ASSERT(x) do { if (!(x)) FIXME("assert failed: %s\n", #x); } while(0)
|
|
#define MAX_DEPTH 125
|
|
|
|
#define odd(x) ((x) & 1)
|
|
|
|
/*------------------------------------------------------------------------
|
|
Bidirectional Character Types
|
|
|
|
as defined by the Unicode Bidirectional Algorithm Table 3-7.
|
|
|
|
Note:
|
|
|
|
The list of bidirectional character types here is not grouped the
|
|
same way as the table 3-7, since the numeric values for the types
|
|
are chosen to keep the state and action tables compact.
|
|
------------------------------------------------------------------------*/
|
|
enum directions
|
|
{
|
|
/* input types */
|
|
/* ON MUST be zero, code relies on ON = NI = 0 */
|
|
ON = 0, /* Other Neutral */
|
|
L, /* Left Letter */
|
|
R, /* Right Letter */
|
|
AN, /* Arabic Number */
|
|
EN, /* European Number */
|
|
AL, /* Arabic Letter (Right-to-left) */
|
|
NSM, /* Non-spacing Mark */
|
|
CS, /* Common Separator */
|
|
ES, /* European Separator */
|
|
ET, /* European Terminator (post/prefix e.g. $ and %) */
|
|
|
|
/* resolved types */
|
|
BN, /* Boundary neutral (type of RLE etc after explicit levels) */
|
|
|
|
/* input types, */
|
|
S, /* Segment Separator (TAB) // used only in L1 */
|
|
WS, /* White space // used only in L1 */
|
|
B, /* Paragraph Separator (aka as PS) */
|
|
|
|
/* types for explicit controls */
|
|
RLO, /* these are used only in X1-X9 */
|
|
RLE,
|
|
LRO,
|
|
LRE,
|
|
PDF,
|
|
|
|
LRI, /* Isolate formatting characters new with 6.3 */
|
|
RLI,
|
|
FSI,
|
|
PDI,
|
|
|
|
/* resolved types, also resolved directions */
|
|
NI = ON, /* alias, where ON, WS, S and Isolates are treated the same */
|
|
};
|
|
|
|
static const char debug_type[][4] =
|
|
{
|
|
"ON", /* Other Neutral */
|
|
"L", /* Left Letter */
|
|
"R", /* Right Letter */
|
|
"AN", /* Arabic Number */
|
|
"EN", /* European Number */
|
|
"AL", /* Arabic Letter (Right-to-left) */
|
|
"NSM", /* Non-spacing Mark */
|
|
"CS", /* Common Separator */
|
|
"ES", /* European Separator */
|
|
"ET", /* European Terminator (post/prefix e.g. $ and %) */
|
|
"BN", /* Boundary neutral (type of RLE etc after explicit levels) */
|
|
"S", /* Segment Separator (TAB) used only in L1 */
|
|
"WS", /* White space used only in L1 */
|
|
"B", /* Paragraph Separator (aka as PS) */
|
|
"RLO", /* these are used only in X1-X9 */
|
|
"RLE",
|
|
"LRO",
|
|
"LRE",
|
|
"PDF",
|
|
"LRI", /* Isolate formatting characters new with 6.3 */
|
|
"RLI",
|
|
"FSI",
|
|
"PDI",
|
|
};
|
|
|
|
static inline void bidi_dump_types(const char* header, const struct bidi_char *chars, UINT32 start, UINT32 end)
|
|
{
|
|
int i, len = 0;
|
|
TRACE("%s:", header);
|
|
for (i = start; i < end && len < 200; i++) {
|
|
TRACE(" %s", debug_type[chars[i].bidi_class]);
|
|
len += strlen(debug_type[chars[i].bidi_class]) + 1;
|
|
}
|
|
if (i != end)
|
|
TRACE("...");
|
|
TRACE("\n");
|
|
}
|
|
|
|
/* RESOLVE EXPLICIT */
|
|
|
|
static inline UINT8 get_greater_even_level(UINT8 level)
|
|
{
|
|
return odd(level) ? level + 1 : level + 2;
|
|
}
|
|
|
|
static inline UINT8 get_greater_odd_level(UINT8 level)
|
|
{
|
|
return odd(level) ? level + 2 : level + 1;
|
|
}
|
|
|
|
static inline UINT8 get_embedding_direction(UINT8 level)
|
|
{
|
|
return odd(level) ? R : L;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------
|
|
Function: bidi_resolve_explicit
|
|
|
|
Recursively resolves explicit embedding levels and overrides.
|
|
Implements rules X1-X9, of the Unicode Bidirectional Algorithm.
|
|
|
|
Note: The function uses two simple counters to keep track of
|
|
matching explicit codes and PDF. Use the default argument for
|
|
the outermost call. The nesting counter counts the recursion
|
|
depth and not the embedding level.
|
|
------------------------------------------------------------------------*/
|
|
typedef struct tagStackItem
|
|
{
|
|
UINT8 level;
|
|
UINT8 override;
|
|
BOOL isolate;
|
|
} StackItem;
|
|
|
|
#define push_stack(l,o,i) \
|
|
do { stack_top--; \
|
|
stack[stack_top].level = l; \
|
|
stack[stack_top].override = o; \
|
|
stack[stack_top].isolate = i;} while(0)
|
|
|
|
#define pop_stack() do { stack_top++; } while(0)
|
|
|
|
#define valid_level(x) (x <= MAX_DEPTH && overflow_isolate_count == 0 && overflow_embedding_count == 0)
|
|
|
|
static void bidi_resolve_explicit(struct bidi_char *chars, unsigned int count, UINT8 baselevel)
|
|
{
|
|
/* X1 */
|
|
int overflow_isolate_count = 0;
|
|
int overflow_embedding_count = 0;
|
|
int valid_isolate_count = 0;
|
|
unsigned int i;
|
|
|
|
StackItem stack[MAX_DEPTH+2];
|
|
int stack_top = MAX_DEPTH+1;
|
|
|
|
stack[stack_top].level = baselevel;
|
|
stack[stack_top].override = NI;
|
|
stack[stack_top].isolate = FALSE;
|
|
|
|
for (i = 0; i < count; ++i)
|
|
{
|
|
struct bidi_char *c = &chars[i];
|
|
UINT8 least_odd, least_even;
|
|
|
|
switch (c->bidi_class)
|
|
{
|
|
|
|
/* X2 */
|
|
case RLE:
|
|
least_odd = get_greater_odd_level(stack[stack_top].level);
|
|
c->resolved = valid_level(least_odd) ? least_odd : stack[stack_top].level;
|
|
if (valid_level(least_odd))
|
|
push_stack(least_odd, NI, FALSE);
|
|
else if (overflow_isolate_count == 0)
|
|
overflow_embedding_count++;
|
|
break;
|
|
|
|
/* X3 */
|
|
case LRE:
|
|
least_even = get_greater_even_level(stack[stack_top].level);
|
|
c->resolved = valid_level(least_even) ? least_even : stack[stack_top].level;
|
|
if (valid_level(least_even))
|
|
push_stack(least_even, NI, FALSE);
|
|
else if (overflow_isolate_count == 0)
|
|
overflow_embedding_count++;
|
|
break;
|
|
|
|
/* X4 */
|
|
case RLO:
|
|
least_odd = get_greater_odd_level(stack[stack_top].level);
|
|
c->resolved = stack[stack_top].level;
|
|
if (valid_level(least_odd))
|
|
push_stack(least_odd, R, FALSE);
|
|
else if (overflow_isolate_count == 0)
|
|
overflow_embedding_count++;
|
|
break;
|
|
|
|
/* X5 */
|
|
case LRO:
|
|
least_even = get_greater_even_level(stack[stack_top].level);
|
|
c->resolved = stack[stack_top].level;
|
|
if (valid_level(least_even))
|
|
push_stack(least_even, L, FALSE);
|
|
else if (overflow_isolate_count == 0)
|
|
overflow_embedding_count++;
|
|
break;
|
|
|
|
/* X5a */
|
|
case RLI:
|
|
least_odd = get_greater_odd_level(stack[stack_top].level);
|
|
c->resolved = stack[stack_top].level;
|
|
if (valid_level(least_odd))
|
|
{
|
|
valid_isolate_count++;
|
|
push_stack(least_odd, NI, TRUE);
|
|
}
|
|
else
|
|
overflow_isolate_count++;
|
|
break;
|
|
|
|
/* X5b */
|
|
case LRI:
|
|
least_even = get_greater_even_level(stack[stack_top].level);
|
|
c->resolved = stack[stack_top].level;
|
|
if (valid_level(least_even))
|
|
{
|
|
valid_isolate_count++;
|
|
push_stack(least_even, NI, TRUE);
|
|
}
|
|
else
|
|
overflow_isolate_count++;
|
|
break;
|
|
|
|
/* X5c */
|
|
case FSI:
|
|
{
|
|
UINT8 new_level = 0;
|
|
int skipping = 0;
|
|
int j;
|
|
|
|
c->resolved = stack[stack_top].level;
|
|
for (j = i+1; j < count; j++)
|
|
{
|
|
const struct bidi_char *p = &chars[j];
|
|
|
|
if (p->bidi_class == LRI || p->bidi_class == RLI || p->bidi_class == FSI)
|
|
{
|
|
skipping++;
|
|
continue;
|
|
}
|
|
else if (p->bidi_class == PDI)
|
|
{
|
|
if (skipping)
|
|
skipping --;
|
|
else
|
|
break;
|
|
continue;
|
|
}
|
|
|
|
if (skipping) continue;
|
|
|
|
if (p->bidi_class == L)
|
|
{
|
|
new_level = 0;
|
|
break;
|
|
}
|
|
else if (p->bidi_class == R || p->bidi_class == AL)
|
|
{
|
|
new_level = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (odd(new_level))
|
|
{
|
|
least_odd = get_greater_odd_level(stack[stack_top].level);
|
|
if (valid_level(least_odd))
|
|
{
|
|
valid_isolate_count++;
|
|
push_stack(least_odd, NI, TRUE);
|
|
}
|
|
else
|
|
overflow_isolate_count++;
|
|
}
|
|
else
|
|
{
|
|
least_even = get_greater_even_level(stack[stack_top].level);
|
|
if (valid_level(least_even))
|
|
{
|
|
valid_isolate_count++;
|
|
push_stack(least_even, NI, TRUE);
|
|
}
|
|
else
|
|
overflow_isolate_count++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* X6 */
|
|
case ON:
|
|
case L:
|
|
case R:
|
|
case AN:
|
|
case EN:
|
|
case AL:
|
|
case NSM:
|
|
case CS:
|
|
case ES:
|
|
case ET:
|
|
case S:
|
|
case WS:
|
|
c->resolved = stack[stack_top].level;
|
|
if (stack[stack_top].override != NI)
|
|
c->resolved = stack[stack_top].override;
|
|
break;
|
|
|
|
/* X6a */
|
|
case PDI:
|
|
if (overflow_isolate_count) overflow_isolate_count--;
|
|
else if (!valid_isolate_count) {/* do nothing */}
|
|
else
|
|
{
|
|
overflow_embedding_count = 0;
|
|
while (!stack[stack_top].isolate) pop_stack();
|
|
pop_stack();
|
|
valid_isolate_count--;
|
|
}
|
|
c->resolved = stack[stack_top].level;
|
|
break;
|
|
|
|
/* X7 */
|
|
case PDF:
|
|
c->resolved = stack[stack_top].level;
|
|
if (overflow_isolate_count) {/* do nothing */}
|
|
else if (overflow_embedding_count) overflow_embedding_count--;
|
|
else if (!stack[stack_top].isolate && stack_top < (MAX_DEPTH+1))
|
|
pop_stack();
|
|
break;
|
|
|
|
/* X8 */
|
|
default:
|
|
c->resolved = baselevel;
|
|
break;
|
|
}
|
|
|
|
c->explicit = c->resolved;
|
|
}
|
|
|
|
/* X9: Based on 5.2 Retaining Explicit Formatting Characters */
|
|
for (i = 0; i < count; ++i)
|
|
{
|
|
switch (chars[i].bidi_class)
|
|
{
|
|
case RLE:
|
|
case LRE:
|
|
case RLO:
|
|
case LRO:
|
|
case PDF:
|
|
chars[i].bidi_class = BN;
|
|
break;
|
|
default:
|
|
;
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline int get_prev_valid_char_index(const struct bidi_char *chars, int index, int back_fence)
|
|
{
|
|
if (index == -1 || index == back_fence) return index;
|
|
index--;
|
|
while (index > back_fence && chars[index].bidi_class == BN) index--;
|
|
return index;
|
|
}
|
|
|
|
static inline int get_next_valid_char_index(const struct bidi_char *chars, int index, int front_fence)
|
|
{
|
|
if (index == front_fence) return index;
|
|
index++;
|
|
while (index < front_fence && chars[index].bidi_class == BN) index++;
|
|
return index;
|
|
}
|
|
|
|
typedef struct tagRun
|
|
{
|
|
int start;
|
|
int end;
|
|
UINT8 e;
|
|
} Run;
|
|
|
|
typedef struct tagRunChar
|
|
{
|
|
WCHAR ch;
|
|
UINT8 *class;
|
|
} RunChar;
|
|
|
|
typedef struct tagIsolatedRun
|
|
{
|
|
struct list entry;
|
|
int length;
|
|
UINT8 sos;
|
|
UINT8 eos;
|
|
UINT8 e;
|
|
|
|
RunChar item[1];
|
|
} IsolatedRun;
|
|
|
|
static inline int get_next_valid_char_from_run(IsolatedRun *run, int index)
|
|
{
|
|
if (index >= (run->length-1)) return -1;
|
|
index++;
|
|
while (index < run->length && *run->item[index].class == BN) index++;
|
|
if (index == run->length) return -1;
|
|
return index;
|
|
}
|
|
|
|
static inline int get_prev_valid_char_from_run(IsolatedRun *run, int index)
|
|
{
|
|
if (index <= 0) return -1;
|
|
index--;
|
|
while (index > -1 && *run->item[index].class == BN) index--;
|
|
return index;
|
|
}
|
|
|
|
static inline void iso_dump_types(const char* header, IsolatedRun *run)
|
|
{
|
|
int i, len = 0;
|
|
TRACE("%s:",header);
|
|
TRACE("[ ");
|
|
for (i = 0; i < run->length && len < 200; i++) {
|
|
TRACE(" %s", debug_type[*run->item[i].class]);
|
|
len += strlen(debug_type[*run->item[i].class])+1;
|
|
}
|
|
if (i != run->length)
|
|
TRACE("...");
|
|
TRACE(" ]\n");
|
|
}
|
|
|
|
/*------------------------------------------------------------------------
|
|
Function: bidi_resolve_weak
|
|
|
|
Resolves the directionality of numeric and other weak character types
|
|
|
|
Implements rules X10 and W1-W6 of the Unicode Bidirectional Algorithm.
|
|
|
|
Input: Array of embedding levels
|
|
Character count
|
|
|
|
In/Out: Array of directional classes
|
|
|
|
Note: On input only these directional classes are expected
|
|
AL, HL, R, L, ON, BN, NSM, AN, EN, ES, ET, CS,
|
|
------------------------------------------------------------------------*/
|
|
static BOOL bidi_is_isolate(UINT8 class)
|
|
{
|
|
return class == LRI || class == RLI || class == FSI || class == PDI;
|
|
}
|
|
|
|
static void bidi_resolve_weak(IsolatedRun *iso_run)
|
|
{
|
|
int i;
|
|
|
|
/* W1 */
|
|
for (i=0; i < iso_run->length; i++) {
|
|
if (*iso_run->item[i].class == NSM) {
|
|
int j = get_prev_valid_char_from_run(iso_run, i);
|
|
if (j == -1)
|
|
*iso_run->item[i].class = iso_run->sos;
|
|
else if (bidi_is_isolate(*iso_run->item[j].class))
|
|
*iso_run->item[i].class = ON;
|
|
else
|
|
*iso_run->item[i].class = *iso_run->item[j].class;
|
|
}
|
|
}
|
|
|
|
/* W2 */
|
|
for (i = 0; i < iso_run->length; i++) {
|
|
if (*iso_run->item[i].class == EN) {
|
|
int j = get_prev_valid_char_from_run(iso_run, i);
|
|
while (j > -1) {
|
|
if (*iso_run->item[j].class == R || *iso_run->item[j].class == L || *iso_run->item[j].class == AL) {
|
|
if (*iso_run->item[j].class == AL)
|
|
*iso_run->item[i].class = AN;
|
|
break;
|
|
}
|
|
j = get_prev_valid_char_from_run(iso_run, j);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* W3 */
|
|
for (i = 0; i < iso_run->length; i++) {
|
|
if (*iso_run->item[i].class == AL)
|
|
*iso_run->item[i].class = R;
|
|
}
|
|
|
|
/* W4 */
|
|
for (i = 0; i < iso_run->length; i++) {
|
|
if (*iso_run->item[i].class == ES) {
|
|
int b = get_prev_valid_char_from_run(iso_run, i);
|
|
int f = get_next_valid_char_from_run(iso_run, i);
|
|
|
|
if (b > -1 && f > -1 && *iso_run->item[b].class == EN && *iso_run->item[f].class == EN)
|
|
*iso_run->item[i].class = EN;
|
|
}
|
|
else if (*iso_run->item[i].class == CS) {
|
|
int b = get_prev_valid_char_from_run(iso_run, i);
|
|
int f = get_next_valid_char_from_run(iso_run, i);
|
|
|
|
if (b > -1 && f > -1 && *iso_run->item[b].class == EN && *iso_run->item[f].class == EN)
|
|
*iso_run->item[i].class = EN;
|
|
else if (b > -1 && f > -1 && *iso_run->item[b].class == AN && *iso_run->item[f].class == AN)
|
|
*iso_run->item[i].class = AN;
|
|
}
|
|
}
|
|
|
|
/* W5 */
|
|
for (i = 0; i < iso_run->length; i++) {
|
|
if (*iso_run->item[i].class == ET) {
|
|
int j;
|
|
for (j = i-1 ; j > -1; j--) {
|
|
if (*iso_run->item[j].class == BN) continue;
|
|
if (*iso_run->item[j].class == ET) continue;
|
|
else if (*iso_run->item[j].class == EN) *iso_run->item[i].class = EN;
|
|
else break;
|
|
}
|
|
if (*iso_run->item[i].class == ET) {
|
|
for (j = i+1; j < iso_run->length; j++) {
|
|
if (*iso_run->item[j].class == BN) continue;
|
|
if (*iso_run->item[j].class == ET) continue;
|
|
else if (*iso_run->item[j].class == EN) *iso_run->item[i].class = EN;
|
|
else break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* W6 */
|
|
for (i = 0; i < iso_run->length; i++) {
|
|
if (*iso_run->item[i].class == ET || *iso_run->item[i].class == ES || *iso_run->item[i].class == CS || *iso_run->item[i].class == ON)
|
|
{
|
|
int b = i-1;
|
|
int f = i+1;
|
|
if (b > -1 && *iso_run->item[b].class == BN)
|
|
*iso_run->item[b].class = ON;
|
|
if (f < iso_run->length && *iso_run->item[f].class == BN)
|
|
*iso_run->item[f].class = ON;
|
|
|
|
*iso_run->item[i].class = ON;
|
|
}
|
|
}
|
|
|
|
/* W7 */
|
|
for (i = 0; i < iso_run->length; i++) {
|
|
if (*iso_run->item[i].class == EN) {
|
|
int j;
|
|
for (j = get_prev_valid_char_from_run(iso_run, i); j > -1; j = get_prev_valid_char_from_run(iso_run, j))
|
|
if (*iso_run->item[j].class == R || *iso_run->item[j].class == L) {
|
|
if (*iso_run->item[j].class == L)
|
|
*iso_run->item[i].class = L;
|
|
break;
|
|
}
|
|
if (iso_run->sos == L && j == -1)
|
|
*iso_run->item[i].class = L;
|
|
}
|
|
}
|
|
}
|
|
|
|
typedef struct tagBracketPair
|
|
{
|
|
int start;
|
|
int end;
|
|
} BracketPair;
|
|
|
|
static int __cdecl bracketpair_compr(const void *a, const void* b)
|
|
{
|
|
return ((BracketPair*)a)->start - ((BracketPair*)b)->start;
|
|
}
|
|
|
|
static BracketPair *bidi_compute_bracket_pairs(IsolatedRun *iso_run)
|
|
{
|
|
WCHAR *open_stack;
|
|
int *stack_index;
|
|
int stack_top = iso_run->length;
|
|
BracketPair *out = NULL;
|
|
int pair_count = 0;
|
|
int i;
|
|
|
|
open_stack = malloc(sizeof(WCHAR) * iso_run->length);
|
|
stack_index = malloc(sizeof(int) * iso_run->length);
|
|
|
|
for (i = 0; i < iso_run->length; i++) {
|
|
unsigned short ubv = get_table_entry_16(bidi_bracket_table, iso_run->item[i].ch);
|
|
if (ubv)
|
|
{
|
|
if (!out)
|
|
{
|
|
out = malloc(sizeof(BracketPair));
|
|
out[0].start = -1;
|
|
}
|
|
|
|
if ((ubv >> 8) == 0) {
|
|
stack_top--;
|
|
open_stack[stack_top] = iso_run->item[i].ch + (signed char)(ubv & 0xff);
|
|
/* deal with canonical equivalent U+2329/232A and U+3008/3009 */
|
|
if (open_stack[stack_top] == 0x232A)
|
|
open_stack[stack_top] = 0x3009;
|
|
stack_index[stack_top] = i;
|
|
}
|
|
else if ((ubv >> 8) == 1) {
|
|
int j;
|
|
|
|
if (stack_top == iso_run->length) continue;
|
|
for (j = stack_top; j < iso_run->length; j++) {
|
|
WCHAR c = iso_run->item[i].ch;
|
|
if (c == 0x232A) c = 0x3009;
|
|
if (c == open_stack[j]) {
|
|
out[pair_count].start = stack_index[j];
|
|
out[pair_count].end = i;
|
|
pair_count++;
|
|
out = realloc(out, sizeof(BracketPair) * (pair_count+1));
|
|
out[pair_count].start = -1;
|
|
stack_top = j+1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (pair_count == 0)
|
|
{
|
|
free(out);
|
|
out = NULL;
|
|
}
|
|
else if (pair_count > 1)
|
|
qsort(out, pair_count, sizeof(BracketPair), bracketpair_compr);
|
|
|
|
free(open_stack);
|
|
free(stack_index);
|
|
return out;
|
|
}
|
|
|
|
static inline UINT8 get_rule_N0_class(UINT8 class)
|
|
{
|
|
return (class == AN || class == EN) ? R : class;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------
|
|
Function: bidi_resolve_neutrals
|
|
|
|
Resolves the directionality of neutral character types.
|
|
|
|
Implements rules N1 and N2 of the Unicode Bidi Algorithm.
|
|
|
|
Input: Array of embedding levels
|
|
Character count
|
|
Baselevel
|
|
|
|
In/Out: Array of directional classes
|
|
|
|
Note: On input only these directional classes are expected
|
|
R, L, NI, AN, EN and BN
|
|
|
|
W8 resolves a number of ENs to L
|
|
------------------------------------------------------------------------*/
|
|
static void bidi_resolve_neutrals(IsolatedRun *run)
|
|
{
|
|
BracketPair *pairs;
|
|
int i;
|
|
|
|
/* Translate isolates into NI */
|
|
for (i = 0; i < run->length; i++) {
|
|
switch (*run->item[i].class) {
|
|
case B:
|
|
case S:
|
|
case WS:
|
|
case FSI:
|
|
case LRI:
|
|
case RLI:
|
|
case PDI: *run->item[i].class = NI;
|
|
}
|
|
|
|
/* "Only NI, L, R, AN, EN and BN are allowed" */
|
|
ASSERT(*run->item[i].class <= EN || *run->item[i].class == BN);
|
|
}
|
|
|
|
/* N0: Skipping bracketed pairs for now */
|
|
pairs = bidi_compute_bracket_pairs(run);
|
|
if (pairs) {
|
|
BracketPair *p = pairs;
|
|
int i = 0;
|
|
while (p->start >= 0) {
|
|
UINT8 e = get_embedding_direction(run->e);
|
|
UINT8 o = get_embedding_direction(run->e + 1);
|
|
BOOL flag_o = FALSE;
|
|
int j;
|
|
|
|
TRACE("Bracket Pair [%i - %i]\n", p->start, p->end);
|
|
|
|
/* N0.b */
|
|
for (j = p->start+1; j < p->end; j++) {
|
|
if (get_rule_N0_class(*run->item[j].class) == e) {
|
|
*run->item[p->start].class = e;
|
|
*run->item[p->end].class = e;
|
|
break;
|
|
}
|
|
else if (get_rule_N0_class(*run->item[j].class) == o)
|
|
flag_o = TRUE;
|
|
}
|
|
/* N0.c */
|
|
if (j == p->end && flag_o) {
|
|
for (j = p->start; j >= 0; j--) {
|
|
if (get_rule_N0_class(*run->item[j].class) == o) {
|
|
*run->item[p->start].class = o;
|
|
*run->item[p->end].class = o;
|
|
break;
|
|
}
|
|
else if (get_rule_N0_class(*run->item[j].class) == e) {
|
|
*run->item[p->start].class = e;
|
|
*run->item[p->end].class = e;
|
|
break;
|
|
}
|
|
}
|
|
if (j < 0) {
|
|
*run->item[p->start].class = run->sos;
|
|
*run->item[p->end].class = run->sos;
|
|
}
|
|
}
|
|
|
|
i++;
|
|
p = &pairs[i];
|
|
}
|
|
free(pairs);
|
|
}
|
|
|
|
/* N1 */
|
|
for (i = 0; i < run->length; i++) {
|
|
UINT8 l, r;
|
|
|
|
if (*run->item[i].class == NI) {
|
|
int b = get_prev_valid_char_from_run(run, i);
|
|
int j;
|
|
|
|
if (b == -1) {
|
|
l = run->sos;
|
|
b = 0;
|
|
}
|
|
else {
|
|
if (*run->item[b].class == R || *run->item[b].class == AN || *run->item[b].class == EN)
|
|
l = R;
|
|
else if (*run->item[b].class == L)
|
|
l = L;
|
|
else /* No string type */
|
|
continue;
|
|
}
|
|
j = get_next_valid_char_from_run(run, i);
|
|
while (j > -1 && *run->item[j].class == NI) j = get_next_valid_char_from_run(run, j);
|
|
if (j == -1) {
|
|
r = run->eos;
|
|
j = run->length;
|
|
}
|
|
else if (*run->item[j].class == R || *run->item[j].class == AN || *run->item[j].class == EN)
|
|
r = R;
|
|
else if (*run->item[j].class == L)
|
|
r = L;
|
|
else /* No string type */
|
|
continue;
|
|
|
|
if (r == l) {
|
|
for (b = i; b < j && b < run->length; b++)
|
|
*run->item[b].class = r;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* N2 */
|
|
for (i = 0; i < run->length; i++) {
|
|
if (*run->item[i].class == NI) {
|
|
int b = i-1;
|
|
int f = i+1;
|
|
|
|
*run->item[i].class = get_embedding_direction(run->e);
|
|
if (b > -1 && *run->item[b].class == BN)
|
|
*run->item[b].class = get_embedding_direction(run->e);
|
|
if (f < run->length && *run->item[f].class == BN)
|
|
*run->item[f].class = get_embedding_direction(run->e);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*------------------------------------------------------------------------
|
|
Function: bidi_resolve_implicit
|
|
|
|
Recursively resolves implicit embedding levels.
|
|
Implements rules I1 and I2 of the Unicode Bidirectional Algorithm.
|
|
|
|
Note: levels may exceed 15 on output.
|
|
Accepted subset of direction classes
|
|
R, L, AN, EN
|
|
------------------------------------------------------------------------*/
|
|
static void bidi_resolve_implicit(struct bidi_char *chars, unsigned int count)
|
|
{
|
|
unsigned int i;
|
|
|
|
/* I1/2 */
|
|
for (i = 0; i < count; ++i)
|
|
{
|
|
struct bidi_char *c = &chars[i];
|
|
|
|
if (c->bidi_class == BN)
|
|
continue;
|
|
|
|
ASSERT(c->bidi_class != ON); /* "No Neutrals allowed to survive here." */
|
|
ASSERT(c->bidi_class <= EN); /* "Out of range." */
|
|
|
|
if (odd(c->resolved) && (c->bidi_class == L || c->bidi_class == EN || c->bidi_class == AN))
|
|
c->resolved++;
|
|
else if (!odd(c->resolved) && c->bidi_class == R)
|
|
c->resolved++;
|
|
else if (!odd(c->resolved) && (c->bidi_class == EN || c->bidi_class == AN))
|
|
c->resolved += 2;
|
|
}
|
|
}
|
|
|
|
static inline BOOL is_rule_L1_reset_class(UINT8 class)
|
|
{
|
|
switch (class) {
|
|
case WS:
|
|
case FSI:
|
|
case LRI:
|
|
case RLI:
|
|
case PDI:
|
|
case LRE:
|
|
case RLE:
|
|
case LRO:
|
|
case RLO:
|
|
case PDF:
|
|
case BN:
|
|
return TRUE;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void bidi_resolve_resolved(struct bidi_char *chars, unsigned int count, UINT8 baselevel)
|
|
{
|
|
int i, sos = 0, eos = count - 1;
|
|
|
|
/* L1 */
|
|
for (i = sos; i <= eos; i++)
|
|
{
|
|
switch (chars[i].nominal_bidi_class)
|
|
{
|
|
case B:
|
|
case S:
|
|
{
|
|
int j = i - 1;
|
|
while (i > sos && j >= sos && is_rule_L1_reset_class(chars[j].nominal_bidi_class))
|
|
chars[j--].resolved = baselevel;
|
|
chars[i].resolved = baselevel;
|
|
}
|
|
break;
|
|
case LRE: case RLE: case LRO: case RLO: case PDF: case BN:
|
|
chars[i].resolved = i ? chars[i - 1].resolved : baselevel;
|
|
break;
|
|
default:
|
|
;
|
|
}
|
|
|
|
if (i == eos && is_rule_L1_reset_class(chars[i].nominal_bidi_class))
|
|
{
|
|
int j = i;
|
|
while (j >= sos && is_rule_L1_reset_class(chars[j].nominal_bidi_class))
|
|
chars[j--].resolved = baselevel;
|
|
}
|
|
}
|
|
}
|
|
|
|
static HRESULT bidi_compute_isolating_runs_set(struct bidi_char *chars, unsigned int count, UINT8 baselevel, struct list *set)
|
|
{
|
|
int run_start, run_end, i;
|
|
int run_count = 0;
|
|
HRESULT hr = S_OK;
|
|
Run *runs;
|
|
|
|
if (!(runs = calloc(count, sizeof(*runs))))
|
|
return E_OUTOFMEMORY;
|
|
|
|
list_init(set);
|
|
|
|
/* Build Runs */
|
|
run_start = 0;
|
|
while (run_start < count)
|
|
{
|
|
run_end = get_next_valid_char_index(chars, run_start, count);
|
|
while (run_end < count && chars[run_end].resolved == chars[run_start].resolved)
|
|
run_end = get_next_valid_char_index(chars, run_end, count);
|
|
run_end--;
|
|
runs[run_count].start = run_start;
|
|
runs[run_count].end = run_end;
|
|
runs[run_count].e = chars[run_start].resolved;
|
|
run_start = get_next_valid_char_index(chars, run_end, count);
|
|
run_count++;
|
|
}
|
|
|
|
/* Build Isolating Runs */
|
|
i = 0;
|
|
while (i < run_count)
|
|
{
|
|
int k = i;
|
|
if (runs[k].start >= 0)
|
|
{
|
|
IsolatedRun *current_isolated;
|
|
int type_fence, real_end;
|
|
int j;
|
|
|
|
if (!(current_isolated = malloc(sizeof(IsolatedRun) + sizeof(RunChar)*count)))
|
|
{
|
|
hr = E_OUTOFMEMORY;
|
|
break;
|
|
}
|
|
|
|
run_start = runs[k].start;
|
|
current_isolated->e = runs[k].e;
|
|
current_isolated->length = (runs[k].end - runs[k].start)+1;
|
|
|
|
for (j = 0; j < current_isolated->length; ++j)
|
|
{
|
|
current_isolated->item[j].class = &chars[runs[k].start+j].bidi_class;
|
|
current_isolated->item[j].ch = chars[runs[k].start+j].ch;
|
|
}
|
|
|
|
run_end = runs[k].end;
|
|
|
|
TRACE("{ [%i -- %i]",run_start, run_end);
|
|
|
|
if (chars[run_end].bidi_class == BN)
|
|
run_end = get_prev_valid_char_index(chars, run_end, runs[k].start);
|
|
|
|
while (run_end < count && (chars[run_end].bidi_class == RLI || chars[run_end].bidi_class == LRI || chars[run_end].bidi_class == FSI))
|
|
{
|
|
j = k+1;
|
|
search:
|
|
while (j < run_count && chars[runs[j].start].bidi_class != PDI) j++;
|
|
if (j < run_count && runs[i].e != runs[j].e) {
|
|
j++;
|
|
goto search;
|
|
}
|
|
|
|
if (j != run_count)
|
|
{
|
|
int l = current_isolated->length;
|
|
int m;
|
|
|
|
current_isolated->length += (runs[j].end - runs[j].start)+1;
|
|
for (m = 0; l < current_isolated->length; l++, m++) {
|
|
current_isolated->item[l].class = &chars[runs[j].start + m].bidi_class;
|
|
current_isolated->item[l].ch = chars[runs[j].start + m].ch;
|
|
}
|
|
|
|
TRACE("[%i -- %i]", runs[j].start, runs[j].end);
|
|
|
|
run_end = runs[j].end;
|
|
if (chars[run_end].bidi_class == BN)
|
|
run_end = get_prev_valid_char_index(chars, run_end, runs[i].start);
|
|
runs[j].start = -1;
|
|
k = j;
|
|
}
|
|
else {
|
|
run_end = count;
|
|
break;
|
|
}
|
|
}
|
|
|
|
type_fence = get_prev_valid_char_index(chars, run_start, -1);
|
|
|
|
if (type_fence == -1)
|
|
current_isolated->sos = max(baselevel, chars[run_start].resolved);
|
|
else
|
|
current_isolated->sos = max(chars[type_fence].resolved, chars[run_start].resolved);
|
|
|
|
current_isolated->sos = get_embedding_direction(current_isolated->sos);
|
|
|
|
if (run_end == count)
|
|
current_isolated->eos = current_isolated->sos;
|
|
else
|
|
{
|
|
/* eos could be an BN */
|
|
if (chars[run_end].resolved == BN)
|
|
{
|
|
real_end = get_prev_valid_char_index(chars, run_end, run_start - 1);
|
|
if (real_end < run_start)
|
|
real_end = run_start;
|
|
}
|
|
else
|
|
real_end = run_end;
|
|
|
|
type_fence = get_next_valid_char_index(chars, run_end, count);
|
|
if (type_fence == count)
|
|
current_isolated->eos = max(baselevel, chars[real_end].resolved);
|
|
else
|
|
current_isolated->eos = max(chars[type_fence].resolved, chars[real_end].resolved);
|
|
|
|
current_isolated->eos = get_embedding_direction(current_isolated->eos);
|
|
}
|
|
|
|
list_add_tail(set, ¤t_isolated->entry);
|
|
TRACE(" } level %i {%s <--> %s}\n", current_isolated->e, debug_type[current_isolated->sos], debug_type[current_isolated->eos]);
|
|
}
|
|
i++;
|
|
}
|
|
|
|
free(runs);
|
|
return hr;
|
|
}
|
|
|
|
HRESULT bidi_computelevels(struct bidi_char *chars, unsigned int count, UINT8 baselevel)
|
|
{
|
|
IsolatedRun *iso_run, *next;
|
|
struct list IsolatingRuns;
|
|
HRESULT hr;
|
|
|
|
if (TRACE_ON(bidi)) bidi_dump_types("start ", chars, 0, count);
|
|
|
|
bidi_resolve_explicit(chars, count, baselevel);
|
|
|
|
if (TRACE_ON(bidi)) bidi_dump_types("after explicit", chars, 0, count);
|
|
|
|
/* X10/BD13: Compute Isolating runs */
|
|
if (FAILED(hr = bidi_compute_isolating_runs_set(chars, count, baselevel, &IsolatingRuns)))
|
|
{
|
|
WARN("Failed to compute isolating runs set, hr %#lx.\n", hr);
|
|
return hr;
|
|
}
|
|
|
|
LIST_FOR_EACH_ENTRY_SAFE(iso_run, next, &IsolatingRuns, IsolatedRun, entry)
|
|
{
|
|
if (TRACE_ON(bidi)) iso_dump_types("run", iso_run);
|
|
|
|
bidi_resolve_weak(iso_run);
|
|
if (TRACE_ON(bidi)) iso_dump_types("after weak", iso_run);
|
|
|
|
bidi_resolve_neutrals(iso_run);
|
|
if (TRACE_ON(bidi)) iso_dump_types("after neutrals", iso_run);
|
|
|
|
list_remove(&iso_run->entry);
|
|
free(iso_run);
|
|
}
|
|
|
|
if (TRACE_ON(bidi)) bidi_dump_types("before implicit", chars, 0, count);
|
|
bidi_resolve_implicit(chars, count);
|
|
|
|
bidi_resolve_resolved(chars, count, baselevel);
|
|
|
|
return S_OK;
|
|
}
|