public static XElement DrawImage(MathNode node)
{
//Top-level draw function: prepare the canvas, then call the draw method of the root node
double baseline = 0;
if (node.AlignToAxis)
baseline = node.Axis();
double height = Math.Max(node.Height, node.Ascender);
double depth = Math.Max(node.Depth, node.Descender);
double vsize = height + depth;
Dictionary<string, string> attrs = new Dictionary<string, string>(){
{"width", string.Format("{0:F6}pt", node.Width)},
{"height", string.Format("{0:F6}pt", vsize)},
{"viewBox", string.Format("0 {0:F6} {1:F6} {2:F6}", (-(height+baseline)), node.Width, vsize)}
};
XElement nodeElement = creatElement("svg", attrs);
nodeElement.SetAttributeValue(XNamespace.Xmlns + "svg", SvgNs.NamespaceName);
nodeElement.SetAttributeValue(XNamespace.Xmlns + "svgmath", SvgMathNs.NamespaceName);
XElement metadataElement = creatElement("metadata", null, false);
XElement metricElement = creatElement("metrics", new Dictionary<string, string>(){
{"baseline", string.Format("{0}", depth - baseline)},
{"axis", string.Format("{0}", depth - baseline + node.Axis())},
{"top", string.Format("{0}", depth + node.Height)},
{"bottom", string.Format("{0}", depth - node.Depth)}
}, true);
metadataElement.Add(metricElement);
nodeElement.Add(metadataElement);
DrawTranslatedNode(node, nodeElement, 0, -baseline);
return nodeElement;
}
public static void DefaultContext(MathNode node)
{
if (node.Parent != null)
{
node.MathSize = node.Parent.MathSize;
node.FontSize = node.Parent.FontSize;
node.MetricList = node.Parent.MetricList;
node.ScriptLevel = node.Parent.ScriptLevel;
node.TightSpaces = node.Parent.TightSpaces;
node.DisplayStyle = node.Parent.DisplayStyle;
node.Color = node.Parent.Color;
node.FontFamilies = node.Parent.FontFamilies;
node.FontWeight = node.Parent.FontWeight;
node.FontStyle = node.Parent.FontStyle;
node.NodeDefaults = node.Parent.NodeDefaults;
node.Parent.MakeChildContext(node);
}
else
{
node.MathSize = node.ParseLength(node.NodeDefaults["mathsize"]);
node.FontSize = node.MathSize;
node.MetricList = null;
node.ScriptLevel = int.Parse(node.NodeDefaults["scriptlevel"]);
node.TightSpaces = false;
node.DisplayStyle = (node.NodeDefaults["displaystyle"] == "true");
node.Color = node.NodeDefaults["mathcolor"];
if (!node.Config.Variants.ContainsKey(node.NodeDefaults["mathvariant"]))
throw new InvalidOperationException("Default mathvariant not defined in configuration file: configuration is unusable");
MathVariant defaultVariant = node.Config.Variants[node.NodeDefaults["mathvariant"]];
node.FontWeight = defaultVariant.Weight;
node.FontStyle = defaultVariant.Style;
node.FontFamilies = defaultVariant.Families;
}
node.ProcessFontAttributes();
node.Width = 0;
node.Height = 0;
node.Depth = 0;
node.Ascender = 0;
node.Descender = 0;
node.LeftSpace = 0;
node.RightSpace = 0;
node.AlignToAxis = false;
node.Base = node;
node.Core = node;
node.Stretchy = false;
node.Accent = false;
node.MoveLimits = false;
node.TextShift = 0;
node.TextStretch = 1;
node.LeftBearing = 0;
node.RightBearing = 0;
node.IsSpace = false;
//Reset metrics list to None(so far, we used metrics from the parent)
node.MetricList = null;
node.NominalMetric = null;
}
public XElement MakeSvg()
{
m_mathConfig = new MathConfig(m_configFileName);
MathNode currentNode = new MathNode(
m_mathDocument.Root.Name.LocalName,
m_mathDocument.Root.Attributes().ToDictionary(kvp => kvp.Name.ToString(), kvp => kvp.Value),
m_mathConfig,
null);
ParseMML(m_mathDocument.Root, currentNode, 0);
return currentNode.MakeImage();
}
public RowDescriptor(MathNode node, List<MathNode> childCells, string rowalign, List<string> columnaligns, List<int> busycells)
{
AlignToAxis = (rowalign == "axis");
Height = 0;
Depth = 0;
SpaceAfter = 0;
Cells = new List<CellDescriptor>();
foreach (MathNode c in childCells)
{
// Find first free cell
while (busycells.Count > Cells.Count && busycells[Cells.Count] > 0)
{
Cells.Add(null);
}
string halign = Measurer.GetByIndexOrLast(columnaligns, Cells.Count);
string valign = rowalign;
int colspan = 1;
int rowspan = 1;
if (c.ElementName == "mtd")
{
if (c.Attributes.ContainsKey("columnalign"))
halign = c.Attributes["columnalign"];
if (c.Attributes.ContainsKey("rowalign"))
valign = c.Attributes["rowalign"];
colspan = int.Parse(c.Attributes.ContainsKey("colspan") ? c.Attributes["colspan"] : "1");
rowspan = int.Parse(c.Attributes.ContainsKey("rowspan") ? c.Attributes["rowspan"] : "1");
}
while (Cells.Count >= node.Columns.Count)
node.Columns.Add(new ColumnDescriptor());
Cells.Add(new CellDescriptor(c, halign, valign, colspan, rowspan));
for (int i = 1; i< colspan; i++)
{
Cells.Add(null);
}
while (Cells.Count > node.Columns.Count)
node.Columns.Add(new ColumnDescriptor());
}
}
public static void MakeLimitContext(MathNode node, MathNode child, string accentProperty)
{
child.DisplayStyle = false;
child.TightSpaces = true;
string accentValue = node.GetProperty(accentProperty);
if (accentValue == null)
{
accentValue = GetAccentValue(child);
}
child.Accent = (accentValue == "true");
if (!child.Accent)
{
child.ScriptLevel += 1;
}
}
public static void GMSqrt(MathNode node, XElement output)
{
DrawBox(node, output);
DrawTranslatedNode(node.Base, output, node.Width - node.Base.Width - node.Gap, 0);
// Basic contour
double x1 = node.Width - node.Base.Width - node.RootWidth - 2 * node.Gap;
double y1 = (node.RootDepth - node.RootHeight) / 2;
double x2 = x1 + node.RootWidth * 0.2;
double y2 = y1;
double x3 = x1 + node.RootWidth * 0.6;
double y3 = node.RootDepth;
double x4 = x1 + node.RootWidth;
double y4 = (-node.RootHeight) + node.LineWidth / 2;
double x5 = node.Width;
double y5 = y4;
// Thickening
double slopeA = (x2 - x3) / (y2 - y3);
double slopeB = (x3 - x4) / (y3 - y4);
double x2a = x2 + (node.ThickLineWidth - node.LineWidth);
double y2a = y2;
double x2c = x2 + node.LineWidth * slopeA / 2;
double y2c = y2 + node.LineWidth * 0.9;
double x2b = x2c + (node.ThickLineWidth - node.LineWidth) / 2;
double y2b = y2c;
double ytmp = y3 - node.LineWidth / 2;
double xtmp = x3 - node.LineWidth * (slopeA + slopeB) / 4;
double y3a = (y2a * slopeA - ytmp * slopeB + xtmp - x2a) / (slopeA - slopeB);
double x3a = xtmp + (y3a - ytmp) * slopeB;
double y3b = (y2b * slopeA - ytmp * slopeB + xtmp - x2b) / (slopeA - slopeB);
double x3b = xtmp + (y3b - ytmp) * slopeB;
// Lean the left protrusion down
y1 += (x2 - x1) * slopeA;
Dictionary <string, string> attrs = new Dictionary <string, string>()
{
{ "stroke", node.Color },
{ "fill", "none" },
{ "stroke-width", string.Format(CultureInfo.InvariantCulture, "{0:F6}", node.LineWidth) },
{ "stroke-linecap", "butt" },
{ "stroke-linejoin", "miter" },
{ "stroke-miterlimit", "10" },
{ "d", string.Format(CultureInfo.InvariantCulture, "M {0:F6} {1:F6} L {2:F6} {3:F6} L {4:F6} {5:F6} L {6:F6} {7:F6} L {8:F6} {9:F6} L {10:F6} {11:F6} L {12:F6} {13:F6} L {14:F6} {15:F6} L {16:F6} {17:F6}", x1, y1, x2a, y2a, x3a, y3a, x3b, y3b, x2b, y2b, x2c, y2c, x3, y3, x4, y4, x5, y5) }
};
output.Add(creatElement("path", attrs));
}
public void MakeChildContext(MathNode child)
{
switch (ElementName)
{
case "mfrac":
MathContext.ChildCMFrac(this, child);
break;
case "mroot":
MathContext.ChildCMRoot(this, child);
break;
case "msub":
MathContext.ChildCMSub(this, child);
break;
case "msup":
MathContext.ChildCMSup(this, child);
break;
case "msubsup":
MathContext.ChildCMSubSup(this, child);
break;
case "mmultiscripts":
MathContext.ChildCMMultiScripts(this, child);
break;
case "munder":
MathContext.ChildCMUnder(this, child);
break;
case "mover":
MathContext.ChildCMOver(this, child);
break;
case "munderover":
MathContext.ChildCMUnderOver(this, child);
break;
default:
MathContext.DefaultChildContext(this, child);
break;
}
}
public static void ParseMML(XElement root, MathNode parentNode, MathConfig mc, int depth)
{
int recDepth = depth + 1;
foreach (XElement element in root.Elements())
{
//ToDo: implement namespaces
Console.WriteLine("{0} {1}", new String(' ', recDepth), element.Name);
MathNode mn = new MathNode(
element.Name.LocalName,
element.Attributes().ToDictionary(kvp => kvp.Name.ToString(), kvp => kvp.Value),
mc, parentNode);
element.Nodes()
.Where(x => x.NodeType == System.Xml.XmlNodeType.Text || x.NodeType == System.Xml.XmlNodeType.Whitespace)
.ToList()
.ForEach(x => mn.Text = mn.Text + string.Join(" ", ((XText)x).Value.Split(null)));
ParseMML(element, mn, mc, recDepth);
}
}
public XElement MakeSvg()
{
// need to enforce point as decimal seperator, otherwise it will fail.
CultureInfo customCulture = CultureInfo.CurrentCulture.Clone() as CultureInfo;
customCulture.NumberFormat.NumberDecimalSeparator = ".";
CultureInfo.CurrentCulture = customCulture;
m_mathConfig = new MathConfig(m_configFileName);
MathNode currentNode = new MathNode(
m_mathDocument.Root.Name.LocalName,
m_mathDocument.Root.Attributes().ToDictionary(kvp => kvp.Name.ToString(), kvp => kvp.Value),
m_mathConfig,
null);
ParseMML(m_mathDocument.Root, currentNode, 0);
return(currentNode.MakeImage());
}
public static void CMStyle(MathNode node)
{
DefaultContext(node);
// Avoid redefinition of mathsize - it is inherited anyway.
// This serves to preserve values of 'big', 'small', and 'normal'
// throughout the MathML instance.
if (node.Attributes != null && node.Attributes.ContainsKey("mathsize"))
{
node.Attributes.Remove("mathsize");
}
if (node.Attributes != null)
{
Dictionary <string, string> newDefaults = new Dictionary <string, string>(node.NodeDefaults);
newDefaults.AddRange(node.Attributes);
node.NodeDefaults = newDefaults;
}
}
public static void DrawTranslatedNode(MathNode node, XElement output, double dx, double dy)
{
if (dx != 0 || dy != 0)
{
XElement svge = creatElement("g", new Dictionary <string, string>()
{
{ "transform", string.Format(CultureInfo.InvariantCulture, "translate({0}, {1})", dx, dy) }
});
node.Draw(svge);
output.Add(svge);
}
else
{
node.Draw(output);
}
//ToDo:Check implementation
}
public static void GMRow(MathNode node, XElement output)
{
DrawBox(node, output);
if (node.Children.Count == 0)
return;
double offset = -node.Children.First().LeftSpace;
foreach (MathNode ch in node.Children)
{
offset += ch.LeftSpace;
double baseline = 0;
if (ch.AlignToAxis && !node.AlignToAxis) //ToDo: might not behave the same as Python since aligntoaxis might be none
baseline = -node.Axis();
DrawTranslatedNode(ch, output, offset, baseline);
offset += ch.Width + ch.RightSpace;
}
}
void ParseMML(XElement root, MathNode parentNode, int depth)
{
int recDepth = depth + 1;
foreach (XElement element in root.Elements())
{
MathNode mn = new MathNode(
element.Name.LocalName,
element.Attributes().ToDictionary(kvp => kvp.Name.ToString(), kvp => kvp.Value),
m_mathConfig, parentNode);
element.Nodes()
.Where(x => x.NodeType == System.Xml.XmlNodeType.Text || x.NodeType == System.Xml.XmlNodeType.Whitespace)
.ToList()
.ForEach(x => mn.Text = mn.Text + string.Join(" ", ((XText)x).Value.Split(null)));
ParseMML(element, mn, recDepth);
}
}
public static void DrawSVGText(MathNode node, XElement output)
{
DrawBox(node, output);
List <string> fontFamilies = node.FontPool().Where(x => x.Used == true).Select(x => x.Family).ToList();
if (fontFamilies.Count == 0)
{
fontFamilies = node.FontFamilies;
}
Dictionary <string, string> attrs = new Dictionary <string, string>()
{
{ "fill", node.Color },
{ "font-family", string.Join(", ", fontFamilies) },
{ "font-size", string.Format(CultureInfo.InvariantCulture, "{0}", node.FontSize) },
{ "text-anchor", "middle" },
{ "x", string.Format(CultureInfo.InvariantCulture, "{0}", (node.Width + node.LeftBearing - node.RightBearing) / 2 / node.TextStretch) },
{ "y", string.Format(CultureInfo.InvariantCulture, "{0}", -node.TextShift) }
};
if (node.FontWeight != "normal")
{
attrs["font-weight"] = node.FontWeight;
}
if (node.FontStyle != "normal")
{
attrs["font-style"] = node.FontStyle;
}
if (node.TextStretch != 1)
{
attrs["transform"] = string.Format(CultureInfo.InvariantCulture, "scale({0}, 1)", node.TextStretch);
}
foreach (KeyValuePair <int, char> ch in MathDefaults.SpecialChars)
{
node.Text = node.Text.Replace((char)ch.Key, ch.Value); //ToDo: validate
}
XElement nxe = creatElement("text", attrs);
XText chars = new XText(node.Text);
nxe.Add(chars);
output.Add(nxe);
}
private void ParseMML(XElement root, MathNode parentNode, int depth)
{
int recDepth = depth + 1;
foreach (XElement element in root.Elements())
{
MathNode mn = new MathNode(
element.Name.LocalName,
element.Attributes().ToDictionary(kvp => kvp.Name.ToString(), kvp => kvp.Value),
m_mathConfig, parentNode);
element.Nodes()
.Where(x => x.NodeType == System.Xml.XmlNodeType.Text || x.NodeType == System.Xml.XmlNodeType.Whitespace)
.ToList()
.ForEach(x => mn.Text = mn.Text + string.Join(" ", ((XText)x).Value.Split(null)));
ParseMML(element, mn, recDepth);
}
}
public static void DrawCircleEnclosure(MathNode node, XElement output)
{
string background = GetBackGround(node);
double r = (node.Width - node.BorderWidth) / 2;
double cx = node.Width / 2;
double cy = (node.Depth - node.Height) / 2;
Dictionary <string, string> attrs = new Dictionary <string, string>()
{
{ "fill", background },
{ "stroke", node.Color },
{ "stroke-width", string.Format(CultureInfo.InvariantCulture, "{0}", node.BorderWidth) },
{ "cx", string.Format(CultureInfo.InvariantCulture, "{0}", cx) },
{ "cy", string.Format(CultureInfo.InvariantCulture, "{0}", cy) },
{ "r", string.Format(CultureInfo.InvariantCulture, "{0}", r) }
};
output.Add(creatElement("circle", attrs));
DrawTranslatedNode(node.Base, output, (node.Width - node.Base.Width) / 2, 0);
}
public static XElement DrawImage(MathNode node)
{
//Top-level draw function: prepare the canvas, then call the draw method of the root node
double baseline = 0;
if (node.AlignToAxis)
{
baseline = node.Axis();
}
double height = Math.Max(node.Height, node.Ascender);
double depth = Math.Max(node.Depth, node.Descender);
double vsize = height + depth;
Dictionary <string, string> attrs = new Dictionary <string, string>()
{
{ "width", string.Format(CultureInfo.InvariantCulture, "{0:F6}pt", node.Width) },
{ "height", string.Format(CultureInfo.InvariantCulture, "{0:F6}pt", vsize) },
{ "viewBox", string.Format(CultureInfo.InvariantCulture, "0 {0:F6} {1:F6} {2:F6}", (-(height + baseline)), node.Width, vsize) }
};
XElement nodeElement = creatElement("svg", attrs);
nodeElement.SetAttributeValue(XNamespace.Xmlns + "svg", SvgNs.NamespaceName);
nodeElement.SetAttributeValue(XNamespace.Xmlns + "svgmath", SvgMathNs.NamespaceName);
XElement metadataElement = creatElement("metadata", null, false);
XElement metricElement = creatElement("metrics", new Dictionary <string, string>()
{
{ "baseline", string.Format(CultureInfo.InvariantCulture, "{0}", depth - baseline) },
{ "axis", string.Format(CultureInfo.InvariantCulture, "{0}", depth - baseline + node.Axis()) },
{ "top", string.Format(CultureInfo.InvariantCulture, "{0}", depth + node.Height) },
{ "bottom", string.Format(CultureInfo.InvariantCulture, "{0}", depth - node.Depth) }
}, true);
metadataElement.Add(metricElement);
nodeElement.Add(metadataElement);
DrawTranslatedNode(node, nodeElement, 0, -baseline);
return(nodeElement);
}
public static string GetAccentValue(MathNode node)
{
if (node.ElementName == "mo")
{
if (node.OpDefaults != null)
{
return(node.OpDefaults.Dict()["accent"]);
}
else
{
return("false");
}
}
else if (MathDefaults.Embellishments.Any(x => x == node.ElementName) && node.Children.Count > 0)
{
return(GetAccentValue(node.Children[0]));
}
else
{
return("false");
}
}
public static void CMath(MathNode node)
{
DefaultContext(node);
// Display style: set differently on 'math'
string attr = null;
if (node.Attributes.ContainsKey("display"))
{
attr = node.Attributes["display"];
node.DisplayStyle = (node.Attributes["display"] == "block");
}
else
{
if (node.Attributes.ContainsKey("mode"))
{
attr = node.Attributes["mode"];
node.DisplayStyle = (attr == "display");
}
else
{
node.DisplayStyle = false;
}
}
}
public static void GMRow(MathNode node, XElement output)
{
DrawBox(node, output);
if (node.Children.Count == 0)
{
return;
}
double offset = -node.Children.First().LeftSpace;
foreach (MathNode ch in node.Children)
{
offset += ch.LeftSpace;
double baseline = 0;
if (ch.AlignToAxis && !node.AlignToAxis) //ToDo: might not behave the same as Python since aligntoaxis might be none
{
baseline = -node.Axis();
}
DrawTranslatedNode(ch, output, offset, baseline);
offset += ch.Width + ch.RightSpace;
}
}
public static void DrawBox(MathNode node, XElement output, double?borderWidth = null, string borderColor = null, double borderRadius = 0)
{
string background = GetBackGround(node);
if (background == "none" && (borderWidth == null || borderWidth == 0))
{
return;
}
if (borderColor == null)
{
borderColor = node.Color;
}
Dictionary <string, string> attrs = new Dictionary <string, string>
{
{ "fill", background },
{ "stroke", "none" },
{ "x", string.Format(CultureInfo.InvariantCulture, "{0}", (double)borderWidth / 2) },
{ "y", string.Format(CultureInfo.InvariantCulture, "{0}", (double)borderWidth / 2 - node.Height) },
{ "width", string.Format(CultureInfo.InvariantCulture, "{0}", node.Width - (double)borderWidth) },
{ "height", string.Format(CultureInfo.InvariantCulture, "{0}", node.Height + node.Depth - (double)borderWidth) }
};
if (borderWidth != null && borderColor != null)
{
attrs["stroke"] = borderColor;
attrs["stroke-width"] = string.Format(CultureInfo.InvariantCulture, "{0}", borderWidth);
if (borderRadius != 0)
{
attrs.Add("rx", string.Format(CultureInfo.InvariantCulture, "{0}", borderRadius));
attrs.Add("ry", string.Format(CultureInfo.InvariantCulture, "{0}", borderRadius));
}
}
XElement rect = creatElement("rect", attrs);
output.Add(rect);
}
public MathNode(string elementName, Dictionary <string, string> attributes, MathConfig config, MathNode parent)
{
ElementName = elementName;
Config = config;
Text = "";
Children = new List <MathNode>();
Attributes = attributes;
Parent = parent;
MetricList = null;
FontFamilies = new List <string>();
NominalMetric = null;
if (parent != null)
{
NodeIndex = parent.Children == null ? 0 : parent.Children.Count;
NodeDefaults = parent.NodeDefaults;
Parent.Children.Add(this);
}
else
{
NodeDefaults = MathDefaults.globalDefaults;
Config.Defaults.Keys.ToList().ForEach(x => NodeDefaults[x] = Config.Defaults[x]);
NodeIndex = 0;
}
}
public void MakeChildContext(MathNode child)
{
switch (ElementName)
{
case "mfrac":
MathContext.ChildCMFrac(this, child);
break;
case "mroot":
MathContext.ChildCMRoot(this, child);
break;
case "msub":
MathContext.ChildCMSub(this, child);
break;
case "msup":
MathContext.ChildCMSup(this, child);
break;
case "msubsup":
MathContext.ChildCMSubSup(this, child);
break;
case "mmultiscripts":
MathContext.ChildCMMultiScripts(this, child);
break;
case "munder":
MathContext.ChildCMUnder(this, child);
break;
case "mover":
MathContext.ChildCMOver(this, child);
break;
case "munderover":
MathContext.ChildCMUnderOver(this, child);
break;
default:
MathContext.DefaultChildContext(this, child);
break;
}
}
public MathNode(string elementName, Dictionary<string, string> attributes, MathConfig config, MathNode parent)
{
ElementName = elementName;
Config = config;
Text = "";
Children = new List<MathNode>();
Attributes = attributes;
Parent = parent;
MetricList = null;
FontFamilies = new List<string>();
NominalMetric = null;
if (parent != null)
{
NodeIndex = parent.Children == null ? 0 : parent.Children.Count;
NodeDefaults = parent.NodeDefaults;
Parent.Children.Add(this);
}
else
{
NodeDefaults = MathDefaults.globalDefaults;
Config.Defaults.Keys.ToList().ForEach(x => NodeDefaults[x] = Config.Defaults[x]);
NodeIndex = 0;
}
}
public static void CMath(MathNode node)
{
DefaultContext(node);
// Display style: set differently on 'math'
string attr = null;
if (node.Attributes.ContainsKey("display"))
{
attr = node.Attributes["display"];
node.DisplayStyle = (node.Attributes["display"] == "block");
}
else
{
if (node.Attributes.ContainsKey("mode"))
{
attr = node.Attributes["mode"];
node.DisplayStyle = (attr == "display");
}
else
{
node.DisplayStyle = false;
}
}
}
public static void DrawBordersEnclosure(MathNode node, XElement output)
{
DrawBox(node, output);
double x1 = node.BorderWidth / 2;
double y1 = node.BorderWidth / 2 - node.Height;
double x2 = node.Width - node.BorderWidth / 2;
double y2 = node.Depth - node.BorderWidth / 2;
// Left
if (node.DecorationData[0])
DrawBorder(node, output, x1, y1, x1, y2);
// Right
if (node.DecorationData[1])
DrawBorder(node, output, x2, y1, x2, y2);
// top
if (node.DecorationData[2])
DrawBorder(node, output, x1, y1, x2, y1);
// bottom
if (node.DecorationData[3])
DrawBorder(node, output, x1, y2, x2, y2);
double offset;
//Left
if (node.DecorationData[0])
{
offset = node.Width - node.Base.Width;
//Right
if (node.DecorationData[1])
offset /= 2;
}
else
{
offset = 0;
}
DrawTranslatedNode(node.Base, output, offset, 0);
}
public static void GMAction(MathNode node, XElement output)
{
if (node.Base != null)
node.Base.Draw(output);
}
public static void DrawTranslatedNode(MathNode node, XElement output, double dx, double dy)
{
if (dx != 0 || dy != 0)
{
XElement svge = creatElement("g", new Dictionary<string, string>() { { "transform", string.Format("translate({0}, {1})", dx, dy) } });
node.Draw(svge);
output.Add(svge);
}
else
{
node.Draw(output);
}
//ToDo:Check implementation
}
public static void DefaultDraw(MathNode node, XElement output)
{
//Matching Python
//Pass
}
public static void GMSpace(MathNode node, XElement output)
{
DrawSVGText(node, output);
}
public static void GMError(MathNode node, XElement output)
{
DrawBox(node, output, node.BorderWidth, "red");
DrawTranslatedNode(node.Base, output, node.BorderWidth, 0);
}
public static void DefaultContext(MathNode node)
{
if (node.Parent != null)
{
node.MathSize = node.Parent.MathSize;
node.FontSize = node.Parent.FontSize;
node.MetricList = node.Parent.MetricList;
node.ScriptLevel = node.Parent.ScriptLevel;
node.TightSpaces = node.Parent.TightSpaces;
node.DisplayStyle = node.Parent.DisplayStyle;
node.Color = node.Parent.Color;
node.FontFamilies = node.Parent.FontFamilies;
node.FontWeight = node.Parent.FontWeight;
node.FontStyle = node.Parent.FontStyle;
node.NodeDefaults = node.Parent.NodeDefaults;
node.Parent.MakeChildContext(node);
}
else
{
node.MathSize = node.ParseLength(node.NodeDefaults["mathsize"]);
node.FontSize = node.MathSize;
node.MetricList = null;
node.ScriptLevel = int.Parse(node.NodeDefaults["scriptlevel"]);
node.TightSpaces = false;
node.DisplayStyle = (node.NodeDefaults["displaystyle"] == "true");
node.Color = node.NodeDefaults["mathcolor"];
if (!node.Config.Variants.ContainsKey(node.NodeDefaults["mathvariant"]))
{
throw new InvalidOperationException("Default mathvariant not defined in configuration file: configuration is unusable");
}
MathVariant defaultVariant = node.Config.Variants[node.NodeDefaults["mathvariant"]];
node.FontWeight = defaultVariant.Weight;
node.FontStyle = defaultVariant.Style;
node.FontFamilies = defaultVariant.Families;
}
node.ProcessFontAttributes();
node.Width = 0;
node.Height = 0;
node.Depth = 0;
node.Ascender = 0;
node.Descender = 0;
node.LeftSpace = 0;
node.RightSpace = 0;
node.AlignToAxis = false;
node.Base = node;
node.Core = node;
node.Stretchy = false;
node.Accent = false;
node.MoveLimits = false;
node.TextShift = 0;
node.TextStretch = 1;
node.LeftBearing = 0;
node.RightBearing = 0;
node.IsSpace = false;
//Reset metrics list to None(so far, we used metrics from the parent)
node.MetricList = null;
node.NominalMetric = null;
}
public static void GMError(MathNode node, XElement output)
{
DrawBox(node, output, node.BorderWidth, "red");
DrawTranslatedNode(node.Base, output, node.BorderWidth, 0);
}
public static void GMFenced(MathNode node, XElement output)
{
GMRow(node, output);
}
public static void GMPhantom(MathNode node, XElement output)
{
//Pass
}
public static void DrawScripts(MathNode node, XElement output)
{
//ToDo: figger wat to match python
// if len(node.children) < 2:
// draw_mrow(node); return
double subY = node.SubShift;
double superY = -node.SuperShift;
DrawBox(node, output);
double offset = 0;
foreach (var item in node.PreWidths.Select((value, i) => new { i, value }))
{
offset += node.PreWidths[item.i];
if (item.i < node.PreSubScripts.Count)
{
MathNode presubscript = node.PreSubScripts[item.i];
DrawTranslatedNode(presubscript, output, offset - presubscript.Width, subY - Adjustment(presubscript));
}
if (item.i < node.PreSuperScripts.Count)
{
MathNode presuperscript = node.PreSuperScripts[item.i];
DrawTranslatedNode(presuperscript, output, offset - presuperscript.Width, superY - Adjustment(presuperscript));
}
}
DrawTranslatedNode(node.Base, output, offset, 0);
offset += node.Base.Width;
foreach (var item in node.PostWidths.Select((value, i) => new { i, value }))
{
if (item.i < node.SubScripts.Count)
{
MathNode subscript = node.SubScripts[item.i];
DrawTranslatedNode(subscript, output, offset, subY - Adjustment(subscript));
}
if (item.i < node.SuperScripts.Count)
{
MathNode superscript = node.SuperScripts[item.i];
DrawTranslatedNode(superscript, output, offset, superY - Adjustment(superscript));
}
offset += node.PostWidths[item.i];
}
}
public static void GMNone(MathNode node, XElement output)
{
//Pass
}
public static void DrawStrikesEnclosure(MathNode node, XElement output)
{
DrawBox(node, output);
node.Base.Draw(output);
double mid_x = node.Width / 2;
double mid_y = (node.Depth - node.Height) / 2;
// horizontal
if (node.DecorationData[0])
DrawStrike(node, output, 0, mid_y, node.Width, mid_y);
// vert
if (node.DecorationData[1])
DrawStrike(node, output, mid_x, -node.Height, mid_x, node.Depth);
// updiag
if (node.DecorationData[2])
DrawStrike(node, output, 0, node.Depth, node.Width, -node.Height);
// downdiag
if (node.DecorationData[3])
DrawStrike(node, output, 0, -node.Height, node.Width, node.Depth);
}
public static void DrawSVGText(MathNode node, XElement output)
{
DrawBox(node, output);
List<string> fontFamilies = node.FontPool().Where(x => x.Used == true).Select(x => x.Family).ToList();
if (fontFamilies.Count == 0)
fontFamilies = node.FontFamilies;
Dictionary<string, string> attrs = new Dictionary<string, string>()
{
{ "fill", node.Color },
{ "font-family", string.Join(", ",fontFamilies) },
{ "font-size", node.FontSize.ToString() },
{ "text-anchor", "middle" },
{ "x", string.Format("{0}",(node.Width + node.LeftBearing - node.RightBearing) / 2 / node.TextStretch)},
{ "y", (-node.TextShift).ToString()}
};
if (node.FontWeight != "normal")
attrs["font-weight"] = node.FontWeight;
if (node.FontStyle != "normal")
attrs["font-style"] = node.FontStyle;
if (node.TextStretch != 1)
attrs["transform"] = string.Format("scale({0}, 1)", node.TextStretch);
foreach (KeyValuePair<int, char> ch in MathDefaults.SpecialChars)
{
node.Text = node.Text.Replace((char)ch.Key, ch.Value); //ToDo: validate
}
XElement nxe = creatElement("text", attrs);
XText chars = new XText(node.Text);
nxe.Add(chars);
output.Add(nxe);
}
public static double GetAlign(MathNode node, string attrName)
{
string attrValue = node.GetProperty(attrName, "center");
if (alignKeywords.ContainsKey(attrValue))
{
return alignKeywords[attrValue];
}
else
{
return 0.5;
//ToDO: node.error("Bad value %s for %s", attrValue, attrName)
}
}
public static void GMPrescripts(MathNode node, XElement output)
{
//Pass
}
public static void DrawBoxEnclosure(MathNode node, XElement output, double roundRadius = 0)
{
DrawBox(node, output, node.BorderWidth, null, roundRadius);
DrawTranslatedNode(node.Base, output, (node.Width - node.Base.Width) / 2, 0);
}
public static void GMPAdded(MathNode node, XElement output)
{
DrawBox(node, output);
DrawTranslatedNode(node.Base, output, node.LeftPadding, 0);
}
public static void DrawCircleEnclosure(MathNode node, XElement output)
{
string background = GetBackGround(node);
double r = (node.Width - node.BorderWidth) / 2;
double cx = node.Width / 2;
double cy = (node.Depth - node.Height) / 2;
Dictionary<string, string> attrs = new Dictionary<string, string>()
{
{ "fill", background},
{"stroke", node.Color },
{ "stroke-width", node.BorderWidth.ToString() },
{ "cx", cx.ToString() },
{ "cy", cy.ToString() },
{ "r", r.ToString() }
};
output.Add(creatElement("circle", attrs));
DrawTranslatedNode(node.Base, output, (node.Width - node.Base.Width) / 2, 0);
}
public static void GMTable(MathNode node, XElement output)
{
DrawBox(node, output);
//Draw cells
double vshift = -node.Height + node.FrameSpacings[1];
double hshift;
foreach (var rowItem in node.Rows.Select((value, r) => new { r, value }))
{
RowDescriptor row = rowItem.value;
vshift += row.Height;
hshift = node.FrameSpacings[0];
foreach (var cellItem in row.Cells.Select((value, c) => new { c, value }))
{
ColumnDescriptor column = node.Columns[cellItem.c];
CellDescriptor cell = row.Cells[cellItem.c];
if (cell != null && cell.Content != null)
{
double cellWidth;
// Calculate horizontal alignment
if (cell.ColSpan > 1)
{
cellWidth = node.Columns.Skip(cellItem.c).Take(cellItem.c + cell.ColSpan).Select(x => x.Width).Sum(); //ToDo: verify
cellWidth += node.Columns.Skip(cellItem.c).Take(cellItem.c + cell.ColSpan - 1).Select(x => x.SpaceAfter).Sum(); //ToDo: verify
}
else
{
cellWidth = column.Width;
}
double hadjust = (cellWidth - cell.Content.Width) * (alignKeywords.ContainsKey(cell.HAlign) ? alignKeywords[cell.HAlign] : 0.5);
// Calculate vertical alignment.
double cellHeight;
if (cell.RowSpan > 1)
{
cellHeight = node.Rows.Skip(rowItem.r).Take(rowItem.r + cell.RowSpan).Select(x => x.Height + x.Depth).Sum(); //ToDo: Verify
cellHeight += node.Rows.Skip(rowItem.r).Take(rowItem.r + cell.RowSpan - 1).Select(x => x.SpaceAfter).Sum(); //ToDo: Verify
}
else
{
cellHeight = row.Height + row.Depth;
}
double vadjust;
if (cell.VAlign == "top")
{
vadjust = cell.Content.Height - row.Height;
}
else if (cell.VAlign == "bottom")
{
vadjust = cellHeight - row.Height - cell.Content.Depth;
}
else if ((cell.VAlign == "axis" || cell.VAlign == "baseline") && cell.RowSpan == 1)
{
vadjust = -cell.VShift; // calculated in the measurer
}
else
{
vadjust = (cell.Content.Height - cell.Content.Depth + cellHeight) / 2 - row.Height;
}
DrawTranslatedNode(cell.Content, output, hshift + hadjust, vshift + vadjust);
}
hshift += column.Width + column.SpaceAfter;
}
vshift += row.Depth + row.SpaceAfter;
}
//Draw frame
double x1 = node.LineWidth / 2;
double y1 = node.LineWidth / 2 - node.Height;
double x2 = node.Width - node.LineWidth / 2;
double y2 = node.Depth - node.LineWidth / 2;
DrawBorder(node, output, x1, y1, x1, y2, node.FrameLines[0]);
DrawBorder(node, output, x2, y1, x2, y2, node.FrameLines[0]);
DrawBorder(node, output, x1, y1, x2, y1, node.FrameLines[1]);
DrawBorder(node, output, x1, y2, x2, y2, node.FrameLines[1]);
// Draw intermediate lines
// First, let's make a grid
hshift = node.FrameSpacings[0];
List <double> hoffsets = new List <double>();
foreach (var item in node.Columns.Select((value, c) => new { c, value }))
{
double spacing = item.value.SpaceAfter;
hshift += item.value.Width;
hoffsets.Add(hshift + spacing / 2);
hshift += spacing;
}
hoffsets[hoffsets.Count - 1] = x2;
vshift = -node.Height + node.FrameSpacings[1];
List <double> voffsets = new List <double>();
foreach (var item in node.Rows.Select((value, r) => new { r, value }))
{
double spacing = item.value.SpaceAfter;
vshift += item.value.Height + item.value.Depth;
voffsets.Add(vshift + spacing / 2);
vshift += spacing;
}
voffsets[voffsets.Count - 1] = y2;
List <double> vspans = Enumerable.Repeat <double>(0, node.Columns.Count).ToList();
for (int r = 0; r < node.Rows.Count - 1; r++)
{
RowDescriptor row = node.Rows[r];
if (row.LineAfter == null)
{
continue;
}
foreach (var cellItem in row.Cells.Select((value, c) => new { c, value }))
{
CellDescriptor cell = cellItem.value;
if (cell == null || cell.ColSpan == 0)
{
continue;
}
for (int i = cellItem.c; i < cellItem.c + cell.ColSpan; i++)
{
vspans[i] = cell.RowSpan;
}
}
vspans = vspans.Select(x => Math.Max(0, x - 1)).ToList();
double lineY = voffsets[r];
double startX = x1;
double endX = x1;
foreach (var cellItem in node.Columns.Select((value, c) => new { c, value }))
{
if (vspans[cellItem.c] > 0)
{
DrawBorder(node, output, startX, lineY, endX, lineY, row.LineAfter);
startX = hoffsets[cellItem.c];
}
endX = hoffsets[cellItem.c];
}
DrawBorder(node, output, startX, lineY, endX, lineY, row.LineAfter);
}
List <double> hspans = Enumerable.Repeat <double>(0, node.Columns.Count).ToList();
for (int c = 0; c < node.Columns.Count - 1; c++)
{
ColumnDescriptor column = node.Columns[c];
if (column.LineAfter == null)
{
continue;
}
foreach (var rowItem in node.Rows.Select((value, r) => new { r, value }))
{
RowDescriptor row = rowItem.value;
if (row.Cells.Count <= c)
{
continue;
}
CellDescriptor cell = row.Cells[c];
if (cell == null || cell.Content == null)
{
continue;
}
for (int j = rowItem.r; j < rowItem.r + cell.RowSpan; j++)
{
hspans[j] = cell.ColSpan;
}
}
hspans = hspans.Select(x => Math.Max(0, x - 1)).ToList();
double lineX = hoffsets[c];
double startY = y1;
double endY = y1;
foreach (var item in node.Rows.Select((value, r) => new { r, value }))
{
if (hspans[item.r] > 0)
{
DrawBorder(node, output, lineX, startY, lineX, endY, column.LineAfter);
startY = voffsets[item.r];
}
endY = voffsets[item.r];
}
DrawBorder(node, output, lineX, startY, lineX, endY, column.LineAfter);
}
}
public static void DrawBorder(MathNode node, XElement output, double x1, double y1, double x2, double y2, string lineStyle)
{
if (lineStyle == null)
return;
if (x1 == x2 && y1 == y2)
return;
Dictionary<string, string> extraStyle = null;
if (lineStyle == "dashed")
{
double linelength = Math.Sqrt(Math.Pow(x1 - x2, 2) + Math.Pow(y1 - y2, 2));
double dashoffset = 5 - ((linelength / node.LineWidth + 3) % 10) / 2;
extraStyle = new Dictionary<string, string>()
{
{ "stroke-dasharray", string.Format("{0:F6},{1:F6}", node.LineWidth * 7, node.LineWidth * 3)},
{ "stroke-dashoffset", string.Format("{0:F6}", node.LineWidth * dashoffset) }
};
}
DrawLine(output, node.Color, node.LineWidth, x1, y1, x2, y2, extraStyle);
}
public static void GMath(MathNode node, XElement output)
{
GMRow(node, output);
}
public static void DrawBorder(MathNode node, XElement output, double x1, double y1, double x2, double y2)
{
DrawLine(output, node.Color, node.BorderWidth, x1, y2, x2, y2);
}
public static double Adjustment(MathNode script)
{
if (script.AlignToAxis)
return script.Axis();
else
return 0;
}
public static void DrawLimits(MathNode node, XElement output)
{
if (node.Core.MoveLimits)
{
DrawScripts(node, output);
return;
}
DrawBox(node, output);
DrawTranslatedNode(node.Base, output, (node.Width - node.Base.Width) / 2, 0);
if (node.UnderScript != null)
DrawTranslatedNode(node.UnderScript, output, (node.Width - node.UnderScript.Width) / 2, node.Depth - node.UnderScript.Depth);
if (node.OverScript != null)
DrawTranslatedNode(node.OverScript, output, (node.Width - node.OverScript.Width) / 2, node.OverScript.Height - node.Height);
}
public static void DrawBorder(MathNode node, XElement output, double x1, double y1, double x2, double y2)
{
DrawLine(output, node.Color, node.BorderWidth, x1, y2, x2, y2);
}
public static string GetBackGround(MathNode node)
{
foreach (string attr in m_backgroundAttributes)
{
if (node.Attributes != null && node.Attributes.ContainsKey(attr))
{
if (node.Attributes[attr] == "transparent")
return "none";
else
return node.Attributes[attr];
}
}
return "none";
}
public static void DrawBoxEnclosure(MathNode node, XElement output, double roundRadius = 0)
{
DrawBox(node, output, node.BorderWidth, null, roundRadius);
DrawTranslatedNode(node.Base, output, (node.Width - node.Base.Width) / 2, 0);
}
public static void GMPrescripts(MathNode node, XElement output)
{
//Pass
}
public static void GMPhantom(MathNode node, XElement output)
{
//Pass
}
public static void GMStyle(MathNode node, XElement output)
{
GMRow(node, output);
}