public LineHeightSpan(TextView view, double lineHeight)
{
_lineHeight = lineHeight;
Paint.FontMetricsInt fm = view.Paint.GetFontMetricsInt();
_ascent = fm.Ascent;
_descent = fm.Descent;
}
public EmojiSpan(EmojiDrawable d, int verticalAlignment, int s, Paint.FontMetricsInt original) :
base(d)
{
fontMetrics = original;
if (original != null)
{
size = System.Math.Abs(fontMetrics.Descent) + System.Math.Abs(fontMetrics.Ascent);
if (size == 0)
{
size = AndroidUtilities.dp(20);
}
}
}
protected override void OnDraw(Canvas canvas)
{
if (null != text)
{
// 画圆
canvas.DrawCircle(Width / 2, Width / 2, Width / 2, mPaintBackground);
// 写字
mPaintText.TextSize = (Width / 2);
mPaintText.StrokeWidth = (3);
mPaintText.GetTextBounds(text, 0, 1, mRect);
// 垂直居中
Paint.FontMetricsInt fontMetrics = mPaintText.GetFontMetricsInt();
int baseline = (MeasuredHeight - fontMetrics.Bottom - fontMetrics.Top) / 2;
// 左右居中
mPaintText.TextAlign = Align.Center;
canvas.DrawText(text, Width / 2, baseline, mPaintText);
}
}
public override int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
Rect rect = drawable.Bounds;
if (fm != null)
{
Paint.FontMetricsInt fmPaint = paint.GetFontMetricsInt();
int fontHeight = fmPaint.Bottom - fmPaint.Top;
int drHeight = rect.Bottom - rect.Top;
int top = drHeight / 2 - fontHeight / 4;
int bottom = drHeight / 2 + fontHeight / 4;
fm.Ascent = -bottom;
fm.Top = -bottom;
fm.Bottom = top;
fm.Descent = top;
}
return(rect.Right);
}
public override int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
if (fm == null)
{
fm = new Paint.FontMetricsInt();
}
if (fontMetrics == null)
{
int sz = base.GetSize(paint, text, start, end, fm);
int offset = AndroidUtilities.dp(8);
int w = AndroidUtilities.dp(10);
fm.Top = -w - offset;
fm.Bottom = w - offset;
fm.Ascent = -w - offset;
fm.Leading = 0;
fm.Descent = w - offset;
return(sz);
}
else
{
if (fm != null)
{
fm.Ascent = fontMetrics.Ascent;
fm.Descent = fontMetrics.Descent;
fm.Top = fontMetrics.Top;
fm.Bottom = fontMetrics.Bottom;
}
if (Drawable != null)
{
Drawable.SetBounds(0, 0, size, size);
}
return(size);
}
}
public static ICharSequence replaceEmoji(ICharSequence cs, Paint.FontMetricsInt fontMetrics, int size)
{
if (cs == null || cs.Length() == 0)
{
return(cs);
}
ISpannable s;
if (cs is ISpannable)
{
s = (ISpannable)cs;
}
else
{
s = SpannableFactory.Instance.NewSpannable(cs);
}
ulong buf = 0;
int emojiCount = 0;
try
{
for (int i = 0; i < cs.Length(); i++)
{
char c = cs.CharAt(i);
if (c == 0xD83C || c == 0xD83D || (buf != 0 && (buf & 0xFFFFFFFF00000000L) == 0 && (c >= 0xDDE6 && c <= 0xDDFA)))
{
buf <<= 16;
buf |= c;
}
else if (buf > 0 && (c & 0xF000) == 0xD000)
{
buf <<= 16;
buf |= c;
EmojiDrawable d = Emoji.getEmojiDrawable(buf);
if (d != null)
{
var span = new EmojiSpan(d, (int)SpanAlign.Bottom, size, fontMetrics);
emojiCount++;
if (c >= 0xDDE6 && c <= 0xDDFA)
{
s.SetSpan(span, i - 3, i + 1, 0);
}
else
{
s.SetSpan(span, i - 1, i + 1, 0);
}
}
buf = 0;
}
else if (c == 0x20E3)
{
if (i > 0)
{
char c2 = cs.CharAt(i - 1);
if ((c2 >= '0' && c2 <= '9') || c2 == '#')
{
buf = c2;
buf <<= 16;
buf |= c;
EmojiDrawable d = Emoji.getEmojiDrawable(buf);
if (d != null)
{
EmojiSpan span = new EmojiSpan(d, (int)SpanAlign.Bottom, size, fontMetrics);
emojiCount++;
s.SetSpan(span, i - 1, i + 1, 0);
}
buf = 0;
}
}
}
else if (inArray(c, emojiChars) == Java.Lang.Boolean.True)
{
EmojiDrawable d = Emoji.getEmojiDrawable(c);
if (d != null)
{
EmojiSpan span = new EmojiSpan(d, (int)SpanAlign.Bottom, size, fontMetrics);
emojiCount++;
s.SetSpan(span, i, i + 1, 0);
}
}
if (emojiCount >= 50)
{
break;
}
}
}
catch (Java.Lang.Exception e)
{
//FileLog.e("tmessages", e);
return(cs);
}
return(s);
}
public override int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm) => (int)(margin + padding + paint.MeasureText(text.SubSequence(start, end)) + padding + margin);
public void ChooseHeight(Java.Lang.ICharSequence text, int start, int end, int spanstartv, int v, Paint.FontMetricsInt fm)
{
fm.Ascent = (int)(_ascent * _lineHeight);
fm.Descent = (int)(_descent * _lineHeight);
}
public override int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
LOCAL_PAINT.Set(paint);
ApplyCustomTypeFace(LOCAL_PAINT, type);
LOCAL_PAINT.GetTextBounds(icon, 0, 1, TEXT_BOUNDS);
if (fm != null)
{
float baselineRatio = baselineAligned ? 0 : BASELINE_RATIO;
fm.Descent = (int)(TEXT_BOUNDS.Height() * baselineRatio);
fm.Ascent = -(TEXT_BOUNDS.Height() - fm.Descent);
fm.Top = fm.Ascent;
fm.Bottom = fm.Descent;
}
return(TEXT_BOUNDS.Width());
}
override public int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
return((int)System.Math.Round(paint.TextSize));
}
public void ChooseHeight(ICharSequence text, int start, int end, int spanstartv, int v, Paint.FontMetricsInt fm)
{
throw new NotImplementedException();
}
override public int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.
FontMetricsInt fm)
{
return(0);
}
public override int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
LocalPaint.Set(paint);
ApplyCustomTypeFace(LocalPaint, _typeface);
LocalPaint.GetTextBounds(_icon, 0, 1, TextBounds);
if (fm != null)
{
fm.Descent = (int)(TextBounds.Height() * BaselineRatio);
fm.Ascent = -(TextBounds.Height() - fm.Descent);
fm.Top = fm.Ascent;
fm.Bottom = fm.Descent;
}
return(TextBounds.Width());
}
