/// <summary>Analyzes text for bidirectional runs.</summary>
/// <remarks>Analyzes text for bidirectional runs. Allocates working buffers.</remarks>
internal virtual void setPara(java.lang.CharSequence text, int start, int end, android.text.TextDirectionHeuristic
textDir)
{
mText = text;
mTextStart = start;
int len = end - start;
mLen = len;
mPos = 0;
if (mWidths == null || mWidths.Length < len)
{
mWidths = new float[[email protected](len)];
}
if (mChars == null || mChars.Length < len)
{
mChars = new char[[email protected](len)];
}
android.text.TextUtils.getChars(text, start, end, mChars, 0);
if (text is android.text.Spanned)
{
android.text.Spanned spanned = (android.text.Spanned)text;
android.text.style.ReplacementSpan[] spans = spanned.getSpans <android.text.style.ReplacementSpan
>(start, end);
{
for (int i = 0; i < spans.Length; i++)
{
int startInPara = spanned.getSpanStart(spans[i]) - start;
int endInPara = spanned.getSpanEnd(spans[i]) - start;
{
for (int j = startInPara; j < endInPara; j++)
{
mChars[j] = '\uFFFC';
}
}
}
}
}
if ((textDir == android.text.TextDirectionHeuristics.LTR || textDir == android.text.TextDirectionHeuristics
.FIRSTSTRONG_LTR || textDir == android.text.TextDirectionHeuristics.ANYRTL_LTR) &&
android.text.TextUtils.doesNotNeedBidi(mChars, 0, len))
{
mDir = android.text.Layout.DIR_LEFT_TO_RIGHT;
mEasy = true;
}
else
{
if (mLevels == null || mLevels.Length < len)
{
mLevels = new byte[[email protected](len)];
}
int bidiRequest;
if (textDir == android.text.TextDirectionHeuristics.LTR)
{
bidiRequest = android.text.Layout.DIR_REQUEST_LTR;
}
else
{
if (textDir == android.text.TextDirectionHeuristics.RTL)
{
bidiRequest = android.text.Layout.DIR_REQUEST_RTL;
}
else
{
if (textDir == android.text.TextDirectionHeuristics.FIRSTSTRONG_LTR)
{
bidiRequest = android.text.Layout.DIR_REQUEST_DEFAULT_LTR;
}
else
{
if (textDir == android.text.TextDirectionHeuristics.FIRSTSTRONG_RTL)
{
bidiRequest = android.text.Layout.DIR_REQUEST_DEFAULT_RTL;
}
else
{
bool isRtl = textDir.isRtl(mChars, 0, len);
bidiRequest = isRtl ? android.text.Layout.DIR_REQUEST_RTL : android.text.Layout.DIR_REQUEST_LTR;
}
}
}
}
mDir = android.text.AndroidBidi.bidi(bidiRequest, mChars, mLevels, len, false);
mEasy = false;
}
}
/// <summary>
/// Returns null if not boring; the width, ascent, and descent in the
/// provided Metrics object (or a new one if the provided one was null)
/// if boring.
/// </summary>
/// <remarks>
/// Returns null if not boring; the width, ascent, and descent in the
/// provided Metrics object (or a new one if the provided one was null)
/// if boring.
/// </remarks>
/// <hide></hide>
public static android.text.BoringLayout.Metrics isBoring(java.lang.CharSequence text
, android.text.TextPaint paint, android.text.TextDirectionHeuristic textDir, android.text.BoringLayout
.Metrics metrics)
{
char[] temp = android.text.TextUtils.obtain(500);
int length = text.Length;
bool boring = true;
{
for (int i = 0; i < length; i += 500)
{
int j = i + 500;
if (j > length)
{
j = length;
}
android.text.TextUtils.getChars(text, i, j, temp, 0);
int n = j - i;
{
for (int a = 0; a < n; a++)
{
char c = temp[a];
if (c == '\n' || c == '\t' || c >= FIRST_RIGHT_TO_LEFT)
{
boring = false;
goto outer_break;
}
}
}
if (textDir != null && textDir.isRtl(temp, 0, n))
{
boring = false;
goto outer_break;
}
}
outer_continue :;
}
outer_break :;
android.text.TextUtils.recycle(temp);
if (boring && text is android.text.Spanned)
{
android.text.Spanned sp = (android.text.Spanned)text;
object[] styles = sp.getSpans <android.text.style.ParagraphStyle>(0, length);
if (styles.Length > 0)
{
boring = false;
}
}
if (boring)
{
android.text.BoringLayout.Metrics fm = metrics;
if (fm == null)
{
fm = new android.text.BoringLayout.Metrics();
}
android.text.TextLine line = android.text.TextLine.obtain();
line.set(paint, text, 0, length, android.text.Layout.DIR_LEFT_TO_RIGHT, android.text.Layout
.DIRS_ALL_LEFT_TO_RIGHT, false, null);
fm.width = (int)android.util.FloatMath.ceil(line.metrics(fm));
android.text.TextLine.recycle(line);
return(fm);
}
else
{
return(null);
}
}