void ClearPreviousLayoutInformation()
{
if (framesetter != null)
{
framesetter.Dispose();
framesetter = null;
}
if (frame != null)
{
frame.Dispose();
frame = null;
}
}
public SizeF GetStringSize(string aString, string aFontName, float aFontSize, HorizontalAlignment aHorizontalAlignment, VerticalAlignment aVerticalAlignment)
{
var fontSize = aFontSize;
float factor = 1;
while (fontSize > 10)
{
fontSize /= 10;
factor *= 10;
}
var vPath = new CGPath();
vPath.AddRect(new CGRect(0, 0, 512, 512));
vPath.CloseSubpath();
var vAttributedString = new NSMutableAttributedString(aString);
var vAttributes = new CTStringAttributes();
// Load the font
var vFont = NativeFontService.Instance.LoadFont(aFontName ?? _systemFontName, (float)fontSize);
vAttributes.Font = vFont;
// Set the horizontal alignment
var vParagraphSettings = new CTParagraphStyleSettings();
switch (aHorizontalAlignment)
{
case HorizontalAlignment.Left:
vParagraphSettings.Alignment = CTTextAlignment.Left;
break;
case HorizontalAlignment.Center:
vParagraphSettings.Alignment = CTTextAlignment.Center;
break;
case HorizontalAlignment.Right:
vParagraphSettings.Alignment = CTTextAlignment.Right;
break;
case HorizontalAlignment.Justified:
vParagraphSettings.Alignment = CTTextAlignment.Justified;
break;
}
var vParagraphStyle = new CTParagraphStyle(vParagraphSettings);
vAttributes.ParagraphStyle = vParagraphStyle;
// Set the attributes for the complete length of the string
vAttributedString.SetAttributes(vAttributes, new NSRange(0, aString.Length));
// Create the framesetter with the attributed string.
var vFrameSetter = new CTFramesetter(vAttributedString);
var textBounds = GetTextSize(vFrameSetter, vPath);
//Logger.Debug("{0} {1}",vSize,aString);
vFrameSetter.Dispose();
vAttributedString.Dispose();
vParagraphStyle.Dispose();
//vFont.Dispose();
vPath.Dispose();
textBounds.Width *= factor;
textBounds.Height *= factor;
//vSize.Width = Math.Ceiling(vSize.Width);
//vSize.Height = Math.Ceiling(vSize.Height);
return(textBounds.Size);
}
public SizeF GetStringSize(
string value,
string fontName,
float fontSize,
HorizontalAlignment horizontalAlignment,
VerticalAlignment verticalAlignment)
{
float factor = 1;
while (fontSize > 10)
{
fontSize /= 10;
factor *= 10;
}
var path = new CGPath();
path.AddRect(new Drawing.RectangleF(0, 0, 512, 512));
path.CloseSubpath();
var attributedString = new NSMutableAttributedString(value);
var attributes = new CTStringAttributes();
// Load the font
var font = NativeFontService.Instance.LoadFont(fontName ?? SystemFontName, fontSize);
attributes.Font = font;
// Set the horizontal alignment
var paragraphSettings = new CTParagraphStyleSettings();
switch (horizontalAlignment)
{
case HorizontalAlignment.Left:
paragraphSettings.Alignment = CTTextAlignment.Left;
break;
case HorizontalAlignment.Center:
paragraphSettings.Alignment = CTTextAlignment.Center;
break;
case HorizontalAlignment.Right:
paragraphSettings.Alignment = CTTextAlignment.Right;
break;
case HorizontalAlignment.Justified:
paragraphSettings.Alignment = CTTextAlignment.Justified;
break;
}
var paragraphStyle = new CTParagraphStyle(paragraphSettings);
attributes.ParagraphStyle = paragraphStyle;
// Set the attributes for the complete length of the string
attributedString.SetAttributes(attributes, new NSRange(0, value.Length));
// Create the frame setter with the attributed string.
var frameSetter = new CTFramesetter(attributedString);
var textBounds = GetTextSize(frameSetter, path);
//Logger.Debug("{0} {1}",vSize,aString);
frameSetter.Dispose();
attributedString.Dispose();
paragraphStyle.Dispose();
//font.Dispose();
path.Dispose();
textBounds.Width *= factor;
textBounds.Height *= factor;
//size.Width = Math.Ceiling(vSize.Width);
//size.Height = Math.Ceiling(vSize.Height);
return(textBounds.Size);
}
public override void Draw(CGRect rect)
{
var framesetter = new CTFramesetter(AttributedText);
var path = new CGPath();
path.AddRect(new CGRect(0, 0, Bounds.Size.Width, Bounds.Size.Height));
var totalFrame = framesetter.GetFrame(new NSRange(0, 0), path, null);
var context = UIGraphics.GetCurrentContext();
context.TextMatrix = CGAffineTransform.MakeIdentity();
context.TranslateCTM(0, Bounds.Size.Height);
context.ScaleCTM(1.0f, -1.0f);
var lines = totalFrame.GetLines();
var lineCount = lines.Length;
var origins = new CGPoint[lineCount];
totalFrame.GetLineOrigins(new NSRange(0, 0), origins);
for (var index = 0; index < lineCount; index++)
{
var line = lines[index];
foreach (var run in line.GetGlyphRuns())
{
var attributes = run.GetAttributes();
var borderColor = attributes.Dictionary[RoundedBorders];
var backgroundColor = attributes.Dictionary[RoundedBackground];
if (backgroundColor == null && borderColor == null)
{
continue;
}
var x = line.GetOffsetForStringIndex(run.StringRange.Location, out var _) + whiteSpaceOffset;
var y = origins[index].Y - (tokenHeight * 0.7);
var tokenPath = UIBezierPath.FromRoundedRect(new CGRect(
x: x, y: y,
width: run.GetTypographicBounds(new NSRange(0, 0), out var _, out var _, out var _) - whiteSpaceOffset,
height: tokenHeight
), tokenCornerRadius);
context.AddPath(tokenPath.CGPath);
if (backgroundColor != null)
{
var color = (UIColor)backgroundColor;
context.SetFillColor(color.CGColor);
context.DrawPath(CGPathDrawingMode.Fill);
var circle = UIBezierPath.FromRoundedRect(new CGRect(
x: x + circlePadding,
y: y + circleYOffset,
width: circleDiameter,
height: circleDiameter
), circleRadius);
context.AddPath(circle.CGPath);
context.SetFillColor(color.ColorWithAlpha(1.0f).CGColor);
context.DrawPath(CGPathDrawingMode.Fill);
}
else
{
var color = ((UIColor)borderColor).CGColor;
context.SetStrokeColor(color);
context.DrawPath(CGPathDrawingMode.Stroke);
}
}
}
path.Dispose();
totalFrame.Dispose();
framesetter.Dispose();
}