public void DrawString(string value)
{
// Get any defined anchors
var xAnchors = GetValues(value.Length, e => e._x, UnitRenderingType.HorizontalOffset);
var yAnchors = GetValues(value.Length, e => e._y, UnitRenderingType.VerticalOffset);
using (var font = this.Element.GetFont(this.Renderer))
{
var fontBaselineHeight = font.Ascent(this.Renderer);
PathStatistics pathStats = null;
var pathScale = 1.0;
if (BaselinePath != null)
{
pathStats = new PathStatistics(BaselinePath.PathData);
if (_authorPathLength > 0) pathScale = _authorPathLength / pathStats.TotalLength;
}
// Get all of the offsets (explicit and defined by spacing)
IList<float> xOffsets;
IList<float> yOffsets;
IList<float> rotations;
float baselineShift = 0.0f;
try
{
this.Renderer.SetBoundable(new FontBoundable(font, (float)(pathStats == null ? 1 : pathStats.TotalLength)));
xOffsets = GetValues(value.Length, e => e._dx, UnitRenderingType.Horizontal);
yOffsets = GetValues(value.Length, e => e._dy, UnitRenderingType.Vertical);
if (StartOffsetAdjust != 0.0f)
{
if (xOffsets.Count < 1)
{
xOffsets.Add(StartOffsetAdjust);
}
else
{
xOffsets[0] += StartOffsetAdjust;
}
}
if (this.Element.LetterSpacing.Value != 0.0f || this.Element.WordSpacing.Value != 0.0f || this.LetterSpacingAdjust != 0.0f)
{
var spacing = this.Element.LetterSpacing.ToDeviceValue(this.Renderer, UnitRenderingType.Horizontal, this.Element) + this.LetterSpacingAdjust;
var wordSpacing = this.Element.WordSpacing.ToDeviceValue(this.Renderer, UnitRenderingType.Horizontal, this.Element);
if (this.Parent == null && this.NumChars == 0 && xOffsets.Count < 1) xOffsets.Add(0);
for (int i = (this.Parent == null && this.NumChars == 0 ? 1 : 0); i < value.Length; i++)
{
if (i >= xOffsets.Count)
{
xOffsets.Add(spacing + (char.IsWhiteSpace(value[i]) ? wordSpacing : 0));
}
else
{
xOffsets[i] += spacing + (char.IsWhiteSpace(value[i]) ? wordSpacing : 0);
}
}
}
rotations = GetValues(value.Length, e => e._rotations);
// Calculate Y-offset due to baseline shift. Don't inherit the value so that it is not accumulated multiple times.
var baselineShiftText = this.Element.Attributes.GetAttribute<string>("baseline-shift");
switch (baselineShiftText)
{
case null:
case "":
case "baseline":
case "inherit":
// do nothing
break;
case "sub":
baselineShift = new SvgUnit(SvgUnitType.Ex, 1).ToDeviceValue(this.Renderer, UnitRenderingType.Vertical, this.Element);
break;
case "super":
baselineShift = -1 * new SvgUnit(SvgUnitType.Ex, 1).ToDeviceValue(this.Renderer, UnitRenderingType.Vertical, this.Element);
break;
default:
var convert = new SvgUnitConverter();
var shiftUnit = (SvgUnit)convert.ConvertFromInvariantString(baselineShiftText);
baselineShift = -1 * shiftUnit.ToDeviceValue(this.Renderer, UnitRenderingType.Vertical, this.Element);
break;
}
if (baselineShift != 0.0f)
{
if (yOffsets.Any())
{
yOffsets[0] += baselineShift;
}
else
{
yOffsets.Add(baselineShift);
}
}
}
finally
{
this.Renderer.PopBoundable();
}
// NOTE: Assuming a horizontal left-to-right font
// Render absolutely positioned items in the horizontal direction
var yPos = Current.Y;
for (int i = 0; i < xAnchors.Count - 1; i++)
{
FlushPath();
_xAnchor = xAnchors[i] + (xOffsets.Count > i ? xOffsets[i] : 0);
EnsurePath();
yPos = (yAnchors.Count > i ? yAnchors[i] : yPos) + (yOffsets.Count > i ? yOffsets[i] : 0);
DrawStringOnCurrPath(value[i].ToString(), font, new PointF(_xAnchor, yPos),
fontBaselineHeight, (rotations.Count > i ? rotations[i] : rotations.LastOrDefault()));
}
// Render any remaining characters
var renderChar = 0;
var xPos = this.Current.X;
if (xAnchors.Any())
{
FlushPath();
renderChar = xAnchors.Count - 1;
xPos = xAnchors.Last();
_xAnchor = xPos;
}
EnsurePath();
// Render individual characters as necessary
var lastIndividualChar = renderChar + Math.Max(Math.Max(Math.Max(Math.Max(xOffsets.Count, yOffsets.Count), yAnchors.Count), rotations.Count) - renderChar - 1, 0);
if (rotations.LastOrDefault() != 0.0f || pathStats != null) lastIndividualChar = value.Length;
if (lastIndividualChar > renderChar)
{
var charBounds = font.MeasureCharacters(this.Renderer, value.Substring(renderChar, Math.Min(lastIndividualChar + 1, value.Length) - renderChar));
PointF pathPoint;
float rotation;
float halfWidth;
for (int i = renderChar; i < lastIndividualChar; i++)
{
xPos += (float)pathScale * (xOffsets.Count > i ? xOffsets[i] : 0) + (charBounds[i - renderChar].X - (i == renderChar ? 0 : charBounds[i - renderChar - 1].X));
yPos = (yAnchors.Count > i ? yAnchors[i] : yPos) + (yOffsets.Count > i ? yOffsets[i] : 0);
if (pathStats == null)
{
DrawStringOnCurrPath(value[i].ToString(), font, new PointF(xPos, yPos),
fontBaselineHeight, (rotations.Count > i ? rotations[i] : rotations.LastOrDefault()));
}
else
{
xPos = Math.Max(xPos, 0);
halfWidth = charBounds[i - renderChar].Width / 2;
if (pathStats.OffsetOnPath(xPos + halfWidth))
{
pathStats.LocationAngleAtOffset(xPos + halfWidth, out pathPoint, out rotation);
pathPoint = new PointF((float)(pathPoint.X - halfWidth * Math.Cos(rotation * Math.PI / 180) - (float)pathScale * yPos * Math.Sin(rotation * Math.PI / 180)),
(float)(pathPoint.Y - halfWidth * Math.Sin(rotation * Math.PI / 180) + (float)pathScale * yPos * Math.Cos(rotation * Math.PI / 180)));
DrawStringOnCurrPath(value[i].ToString(), font, pathPoint, fontBaselineHeight, rotation);
}
}
}
// Add the kerning to the next character
if (lastIndividualChar < value.Length)
{
xPos += charBounds[charBounds.Count - 1].X - charBounds[charBounds.Count - 2].X;
}
else
{
xPos += charBounds.Last().Width;
}
}
// Render the string normally
if (lastIndividualChar < value.Length)
{
xPos += (xOffsets.Count > lastIndividualChar ? xOffsets[lastIndividualChar] : 0);
yPos = (yAnchors.Count > lastIndividualChar ? yAnchors[lastIndividualChar] : yPos) +
(yOffsets.Count > lastIndividualChar ? yOffsets[lastIndividualChar] : 0);
DrawStringOnCurrPath(value.Substring(lastIndividualChar), font, new PointF(xPos, yPos),
fontBaselineHeight, rotations.LastOrDefault());
var bounds = font.MeasureString(this.Renderer, value.Substring(lastIndividualChar));
xPos += bounds.Width;
}
NumChars += value.Length;
// Undo any baseline shift. This is not persisted, unlike normal vertical offsets.
this.Current = new PointF(xPos, yPos - baselineShift);
}
}
public void DrawString(string value)
{
// Get any defined anchors
var xAnchors = GetValues(value.Length, e => e._x, UnitRenderingType.HorizontalOffset);
var yAnchors = GetValues(value.Length, e => e._y, UnitRenderingType.VerticalOffset);
using (var font = this.Element.GetFont(this.Renderer))
{
var fontBaselineHeight = font.Ascent(this.Renderer);
PathStatistics pathStats = null;
var pathScale = 1.0;
if (BaselinePath != null)
{
pathStats = new PathStatistics(BaselinePath.PathData);
if (_authorPathLength > 0)
{
pathScale = _authorPathLength / pathStats.TotalLength;
}
}
// Get all of the offsets (explicit and defined by spacing)
IList <float> xOffsets;
IList <float> yOffsets;
IList <float> rotations;
float baselineShift = 0.0f;
try
{
this.Renderer.SetBoundable(new FontBoundable(font, (float)(pathStats == null ? 1 : pathStats.TotalLength)));
xOffsets = GetValues(value.Length, e => e._dx, UnitRenderingType.Horizontal);
yOffsets = GetValues(value.Length, e => e._dy, UnitRenderingType.Vertical);
if (StartOffsetAdjust != 0.0f)
{
if (xOffsets.Count < 1)
{
xOffsets.Add(StartOffsetAdjust);
}
else
{
xOffsets[0] += StartOffsetAdjust;
}
}
if (this.Element.LetterSpacing.Value != 0.0f || this.Element.WordSpacing.Value != 0.0f || this.LetterSpacingAdjust != 0.0f)
{
var spacing = this.Element.LetterSpacing.ToDeviceValue(this.Renderer, UnitRenderingType.Horizontal, this.Element) + this.LetterSpacingAdjust;
var wordSpacing = this.Element.WordSpacing.ToDeviceValue(this.Renderer, UnitRenderingType.Horizontal, this.Element);
if (this.Parent == null && this.NumChars == 0 && xOffsets.Count < 1)
{
xOffsets.Add(0);
}
for (int i = (this.Parent == null && this.NumChars == 0 ? 1 : 0); i < value.Length; i++)
{
if (i >= xOffsets.Count)
{
xOffsets.Add(spacing + (char.IsWhiteSpace(value[i]) ? wordSpacing : 0));
}
else
{
xOffsets[i] += spacing + (char.IsWhiteSpace(value[i]) ? wordSpacing : 0);
}
}
}
rotations = GetValues(value.Length, e => e._rotations);
// Calculate Y-offset due to baseline shift. Don't inherit the value so that it is not accumulated multiple times.
var baselineShiftText = Element.BaselineShift.Trim().ToLower();
if (string.IsNullOrEmpty(baselineShiftText))
{
baselineShiftText = "baseline";
}
switch (baselineShiftText)
{
case "baseline":
// do nothing
break;
case "sub":
baselineShift = new SvgUnit(SvgUnitType.Ex, 1).ToDeviceValue(this.Renderer, UnitRenderingType.Vertical, this.Element);
break;
case "super":
baselineShift = -1f * new SvgUnit(SvgUnitType.Ex, 1).ToDeviceValue(this.Renderer, UnitRenderingType.Vertical, this.Element);
break;
default:
var convert = new SvgUnitConverter();
var shiftUnit = (SvgUnit)convert.ConvertFromInvariantString(baselineShiftText);
baselineShift = -1f * shiftUnit.ToDeviceValue(this.Renderer, UnitRenderingType.Vertical, this.Element);
break;
}
if (baselineShift != 0.0f)
{
if (yOffsets.Any())
{
yOffsets[0] += baselineShift;
}
else
{
yOffsets.Add(baselineShift);
}
}
}
finally
{
this.Renderer.PopBoundable();
}
var xTextStart = Current.X;
// NOTE: Assuming a horizontal left-to-right font
// Render absolutely positioned items in the horizontal direction
var yPos = Current.Y;
for (int i = 0; i < xAnchors.Count - 1; i++)
{
FlushPath();
_xAnchor = xAnchors[i] + (xOffsets.Count > i ? xOffsets[i] : 0);
EnsurePath();
yPos = (yAnchors.Count > i ? yAnchors[i] : yPos) + (yOffsets.Count > i ? yOffsets[i] : 0);
xTextStart = xTextStart.Equals(Current.X) ? _xAnchor : xTextStart;
DrawStringOnCurrPath(value[i].ToString(), font, new PointF(_xAnchor, yPos),
fontBaselineHeight, (rotations.Count > i ? rotations[i] : rotations.LastOrDefault()));
}
// Render any remaining characters
var renderChar = 0;
var xPos = this.Current.X;
if (xAnchors.Any())
{
FlushPath();
renderChar = xAnchors.Count - 1;
xPos = xAnchors.Last();
_xAnchor = xPos;
}
EnsurePath();
// Render individual characters as necessary
var lastIndividualChar = renderChar + Math.Max(Math.Max(Math.Max(Math.Max(xOffsets.Count, yOffsets.Count), yAnchors.Count), rotations.Count) - renderChar - 1, 0);
if (rotations.LastOrDefault() != 0.0f || pathStats != null)
{
lastIndividualChar = value.Length;
}
if (lastIndividualChar > renderChar)
{
var charBounds = font.MeasureCharacters(this.Renderer, value.Substring(renderChar, Math.Min(lastIndividualChar + 1, value.Length) - renderChar));
PointF pathPoint;
float rotation;
float halfWidth;
for (int i = renderChar; i < lastIndividualChar; i++)
{
xPos += (float)pathScale * (xOffsets.Count > i ? xOffsets[i] : 0) + (charBounds[i - renderChar].X - (i == renderChar ? 0 : charBounds[i - renderChar - 1].X));
yPos = (yAnchors.Count > i ? yAnchors[i] : yPos) + (yOffsets.Count > i ? yOffsets[i] : 0);
if (pathStats == null)
{
xTextStart = xTextStart.Equals(Current.X) ? xPos : xTextStart;
DrawStringOnCurrPath(value[i].ToString(), font, new PointF(xPos, yPos),
fontBaselineHeight, (rotations.Count > i ? rotations[i] : rotations.LastOrDefault()));
}
else
{
xPos = Math.Max(xPos, 0);
halfWidth = charBounds[i - renderChar].Width / 2;
if (pathStats.OffsetOnPath(xPos + halfWidth))
{
pathStats.LocationAngleAtOffset(xPos + halfWidth, out pathPoint, out rotation);
pathPoint = new PointF((float)(pathPoint.X - halfWidth * Math.Cos(rotation * Math.PI / 180) - (float)pathScale * yPos * Math.Sin(rotation * Math.PI / 180)),
(float)(pathPoint.Y - halfWidth * Math.Sin(rotation * Math.PI / 180) + (float)pathScale * yPos * Math.Cos(rotation * Math.PI / 180)));
xTextStart = xTextStart.Equals(Current.X) ? pathPoint.X : xTextStart;
DrawStringOnCurrPath(value[i].ToString(), font, pathPoint, fontBaselineHeight, rotation);
}
}
}
// Add the kerning to the next character
if (lastIndividualChar < value.Length)
{
xPos += charBounds[charBounds.Count - 1].X - charBounds[charBounds.Count - 2].X;
}
else
{
xPos += charBounds.Last().Width;
}
}
// Render the string normally
if (lastIndividualChar < value.Length)
{
xPos += (xOffsets.Count > lastIndividualChar ? xOffsets[lastIndividualChar] : 0);
yPos = (yAnchors.Count > lastIndividualChar ? yAnchors[lastIndividualChar] : yPos) +
(yOffsets.Count > lastIndividualChar ? yOffsets[lastIndividualChar] : 0);
xTextStart = xTextStart.Equals(Current.X) ? xPos : xTextStart;
DrawStringOnCurrPath(value.Substring(lastIndividualChar), font, new PointF(xPos, yPos),
fontBaselineHeight, rotations.LastOrDefault());
var bounds = font.MeasureString(this.Renderer, value.Substring(lastIndividualChar));
xPos += bounds.Width;
}
NumChars += value.Length;
// Undo any baseline shift. This is not persisted, unlike normal vertical offsets.
this.Current = new PointF(xPos, yPos - baselineShift);
this.TextBounds = new RectangleF(xTextStart, 0, this.Current.X - xTextStart, 0);
}
}
/// <summary>
/// Gets the <see cref="GraphicsPath"/> for this element.
/// </summary>
/// <value></value>
public override System.Drawing.Drawing2D.GraphicsPath Path(SvgRenderer renderer)
{
// Make sure the path is always null if there is no text
//if there is a TSpan inside of this text element then path should not be null (even if this text is empty!)
if ((string.IsNullOrEmpty(this.Text) || this.Text.Trim().Length < 1) && this.Children.Where(x => x is SvgTextSpan).Select(x => x as SvgTextSpan).Count() == 0)
{
return(_path = null);
}
//NOT SURE WHAT THIS IS ABOUT - Path gets created again anyway - WTF?
// When an empty string is passed to GraphicsPath, it rises an InvalidArgumentException...
if (_path == null || this.IsPathDirty)
{
renderer = (renderer ?? SvgRenderer.FromNull());
// Measure the overall bounds of all the text
var boundsData = GetTextBounds(renderer);
var font = GetFont(renderer);
SvgTextBase innerText;
float x = (_x.Count < 1 ? _calcX : _x[0].ToDeviceValue(renderer, UnitRenderingType.HorizontalOffset, this)) +
(_dx.Count < 1 ? 0 : _dx[0].ToDeviceValue(renderer, UnitRenderingType.Horizontal, this));
float y = (_y.Count < 1 ? _calcY : _y[0].ToDeviceValue(renderer, UnitRenderingType.VerticalOffset, this)) +
(_dy.Count < 1 ? 0 : _dy[0].ToDeviceValue(renderer, UnitRenderingType.Vertical, this));
_path = new GraphicsPath();
_path.StartFigure();
// Determine the location of the start point
switch (this.TextAnchor)
{
case SvgTextAnchor.Middle:
x -= (boundsData.Bounds.Width / 2);
break;
case SvgTextAnchor.End:
x -= boundsData.Bounds.Width;
break;
}
try
{
renderer.Boundable(new FontBoundable(font));
switch (this.BaselineShift)
{
case null:
case "":
case "baseline":
case "inherit":
// do nothing
break;
case "sub":
y += new SvgUnit(SvgUnitType.Ex, 1).ToDeviceValue(renderer, UnitRenderingType.Vertical, this);
break;
case "super":
y -= new SvgUnit(SvgUnitType.Ex, 1).ToDeviceValue(renderer, UnitRenderingType.Vertical, this);
break;
default:
var convert = new SvgUnitConverter();
var shift = (SvgUnit)convert.ConvertFromInvariantString(this.BaselineShift);
y -= shift.ToDeviceValue(renderer, UnitRenderingType.Vertical, this);
break;
}
}
finally
{
renderer.PopBoundable();
}
NodeBounds data;
var yCummOffset = 0.0f;
for (var i = 0; i < boundsData.Nodes.Count; i++)
{
data = boundsData.Nodes[i];
innerText = data.Node as SvgTextBase;
if (innerText == null)
{
// Minus FontSize because the x/y coords mark the bottom left, not bottom top.
DrawString(renderer, _path, x + data.xOffset, y - boundsData.Bounds.Height, font,
PrepareText(data.Node.Content, i > 0 && boundsData.Nodes[i - 1].Node is SvgTextBase,
i < boundsData.Nodes.Count - 1 && boundsData.Nodes[i + 1].Node is SvgTextBase));
}
else
{
innerText._calcX = x + data.xOffset;
innerText._calcY = y + yCummOffset;
if (innerText.Dy.Count == 1)
{
yCummOffset += innerText.Dy[0].ToDeviceValue(renderer, UnitRenderingType.Vertical, this);
}
}
}
_path.CloseFigure();
this.IsPathDirty = false;
}
return(_path);
}