/// <summary>
/// Copy the content of a BidiRun instance
/// </summary>
///
/// @draft ICU 3.8
internal void CopyFrom(BidiRun run)
{
this.start = run.start;
this.limit = run.limit;
this.level = run.level;
this.insertRemove = run.insertRemove;
}
static internal String WriteReordered(Bidi bidi, int options)
{
int run, runCount;
StringBuilder dest;
char[] text = bidi.text;
runCount = bidi.CountRuns();
/*
* Option "insert marks" implies Bidi.INSERT_LRM_FOR_NUMERIC if the
* reordering mode (checked below) is appropriate.
*/
if ((bidi.reorderingOptions & IBM.ICU.Text.Bidi.OPTION_INSERT_MARKS) != 0)
{
options |= IBM.ICU.Text.Bidi.INSERT_LRM_FOR_NUMERIC;
options &= ~IBM.ICU.Text.Bidi.REMOVE_BIDI_CONTROLS;
}
/*
* Option "remove controls" implies Bidi.REMOVE_BIDI_CONTROLS and
* cancels Bidi.INSERT_LRM_FOR_NUMERIC.
*/
if ((bidi.reorderingOptions & IBM.ICU.Text.Bidi.OPTION_REMOVE_CONTROLS) != 0)
{
options |= IBM.ICU.Text.Bidi.REMOVE_BIDI_CONTROLS;
options &= ~IBM.ICU.Text.Bidi.INSERT_LRM_FOR_NUMERIC;
}
/*
* If we do not perform the "inverse Bidi" algorithm, then we don't need
* to insert any LRMs, and don't need to test for it.
*/
if ((bidi.reorderingMode != IBM.ICU.Text.Bidi.REORDER_INVERSE_NUMBERS_AS_L) &&
(bidi.reorderingMode != IBM.ICU.Text.Bidi.REORDER_INVERSE_LIKE_DIRECT) &&
(bidi.reorderingMode != IBM.ICU.Text.Bidi.REORDER_INVERSE_FOR_NUMBERS_SPECIAL) &&
(bidi.reorderingMode != IBM.ICU.Text.Bidi.REORDER_RUNS_ONLY))
{
options &= ~IBM.ICU.Text.Bidi.INSERT_LRM_FOR_NUMERIC;
}
dest = new StringBuilder(
((options & IBM.ICU.Text.Bidi.INSERT_LRM_FOR_NUMERIC) != 0) ? bidi.length * 2
: bidi.length);
/*
* Iterate through all visual runs and copy the run text segments to the
* destination, according to the options.
*
* The tests for where to insert LRMs ignore the fact that there may be
* BN codes or non-BMP code points at the beginning and end of a run;
* they may insert LRMs unnecessarily but the tests are faster this way
* (this would have to be improved for UTF-8).
*/
if ((options & IBM.ICU.Text.Bidi.OUTPUT_REVERSE) == 0)
{
/* forward output */
if ((options & IBM.ICU.Text.Bidi.INSERT_LRM_FOR_NUMERIC) == 0)
{
/* do not insert Bidi controls */
for (run = 0; run < runCount; ++run)
{
BidiRun bidiRun = bidi.GetVisualRun(run);
if (bidiRun.IsEvenRun())
{
dest.Append(DoWriteForward(text, bidiRun.start,
bidiRun.limit, options & ~IBM.ICU.Text.Bidi.DO_MIRRORING));
}
else
{
dest.Append(DoWriteReverse(text, bidiRun.start,
bidiRun.limit, options));
}
}
}
else
{
/* insert Bidi controls for "inverse Bidi" */
sbyte[] dirProps = bidi.dirProps;
char uc;
int markFlag;
for (run = 0; run < runCount; ++run)
{
BidiRun bidiRun_0 = bidi.GetVisualRun(run);
markFlag = 0;
/* check if something relevant in insertPoints */
markFlag = bidi.runs[run].insertRemove;
if (markFlag < 0) /* bidi controls count */
{
markFlag = 0;
}
if (bidiRun_0.IsEvenRun())
{
if (bidi.IsInverse() &&
dirProps[bidiRun_0.start] != IBM.ICU.Text.Bidi.L)
{
markFlag |= IBM.ICU.Text.Bidi.LRM_BEFORE;
}
if ((markFlag & IBM.ICU.Text.Bidi.LRM_BEFORE) != 0)
{
uc = LRM_CHAR;
}
else if ((markFlag & IBM.ICU.Text.Bidi.RLM_BEFORE) != 0)
{
uc = RLM_CHAR;
}
else
{
uc = ((Char)0);
}
if (uc != 0)
{
dest.Append(uc);
}
dest.Append(DoWriteForward(text, bidiRun_0.start,
bidiRun_0.limit, options & ~IBM.ICU.Text.Bidi.DO_MIRRORING));
if (bidi.IsInverse() &&
dirProps[bidiRun_0.limit - 1] != IBM.ICU.Text.Bidi.L)
{
markFlag |= IBM.ICU.Text.Bidi.LRM_AFTER;
}
if ((markFlag & IBM.ICU.Text.Bidi.LRM_AFTER) != 0)
{
uc = LRM_CHAR;
}
else if ((markFlag & IBM.ICU.Text.Bidi.RLM_AFTER) != 0)
{
uc = RLM_CHAR;
}
else
{
uc = ((Char)0);
}
if (uc != 0)
{
dest.Append(uc);
}
}
else /* RTL run */
{
if (bidi.IsInverse() &&
!bidi.TestDirPropFlagAt(MASK_R_AL,
bidiRun_0.limit - 1))
{
markFlag |= IBM.ICU.Text.Bidi.RLM_BEFORE;
}
if ((markFlag & IBM.ICU.Text.Bidi.LRM_BEFORE) != 0)
{
uc = LRM_CHAR;
}
else if ((markFlag & IBM.ICU.Text.Bidi.RLM_BEFORE) != 0)
{
uc = RLM_CHAR;
}
else
{
uc = ((Char)0);
}
if (uc != 0)
{
dest.Append(uc);
}
dest.Append(DoWriteReverse(text, bidiRun_0.start,
bidiRun_0.limit, options));
if (bidi.IsInverse() &&
(MASK_R_AL & IBM.ICU.Text.Bidi
.DirPropFlag(dirProps[bidiRun_0.start])) == 0)
{
markFlag |= IBM.ICU.Text.Bidi.RLM_AFTER;
}
if ((markFlag & IBM.ICU.Text.Bidi.LRM_AFTER) != 0)
{
uc = LRM_CHAR;
}
else if ((markFlag & IBM.ICU.Text.Bidi.RLM_AFTER) != 0)
{
uc = RLM_CHAR;
}
else
{
uc = ((Char)0);
}
if (uc != 0)
{
dest.Append(uc);
}
}
}
}
}
else
{
/* reverse output */
if ((options & IBM.ICU.Text.Bidi.INSERT_LRM_FOR_NUMERIC) == 0)
{
/* do not insert Bidi controls */
for (run = runCount; --run >= 0;)
{
BidiRun bidiRun_1 = bidi.GetVisualRun(run);
if (bidiRun_1.IsEvenRun())
{
dest.Append(DoWriteReverse(text, bidiRun_1.start,
bidiRun_1.limit, options & ~IBM.ICU.Text.Bidi.DO_MIRRORING));
}
else
{
dest.Append(DoWriteForward(text, bidiRun_1.start,
bidiRun_1.limit, options));
}
}
}
else
{
/* insert Bidi controls for "inverse Bidi" */
sbyte[] dirProps_2 = bidi.dirProps;
for (run = runCount; --run >= 0;)
{
/* reverse output */
BidiRun bidiRun_3 = bidi.GetVisualRun(run);
if (bidiRun_3.IsEvenRun())
{
if (dirProps_2[bidiRun_3.limit - 1] != IBM.ICU.Text.Bidi.L)
{
dest.Append(LRM_CHAR);
}
dest.Append(DoWriteReverse(text, bidiRun_3.start,
bidiRun_3.limit, options & ~IBM.ICU.Text.Bidi.DO_MIRRORING));
if (dirProps_2[bidiRun_3.start] != IBM.ICU.Text.Bidi.L)
{
dest.Append(LRM_CHAR);
}
}
else
{
if ((MASK_R_AL & IBM.ICU.Text.Bidi
.DirPropFlag(dirProps_2[bidiRun_3.start])) == 0)
{
dest.Append(RLM_CHAR);
}
dest.Append(DoWriteForward(text, bidiRun_3.start,
bidiRun_3.limit, options));
if ((MASK_R_AL & IBM.ICU.Text.Bidi
.DirPropFlag(dirProps_2[bidiRun_3.limit - 1])) == 0)
{
dest.Append(RLM_CHAR);
}
}
}
}
}
return(dest.ToString());
}