private void Parse_MouseDown(object sender, MouseButtonEventArgs e)
{
canvasString = InputTextBox.Text;
canvasString = canvasString.Replace(" ", "");
if (canvasString == "")
{
imageCanvas.Source = null;
return;
}
if (ParseFormula())
{
imageCanvas.Source = null;
return;
}
TexFormula formula = Parse_Formula(canvasString);
if (formula == null)
{
return;
}
TexRenderer renderer = formula.GetRenderer(TexStyle.Display, 20.0, "Arial");
savePng = renderer.RenderToBitmap(0.0, 0.0);
imageCanvas.Source = savePng;
}
private void Render()
{
// Create formula object from input text.
if (texFormula == null)
{
formulaContainerElement.Visual = null;
return;
}
// Render formula to visual.
var visual = new DrawingVisual();
var renderer = texFormula.GetRenderer(TexStyle.Display, Scale);
using (var drawingContext = visual.RenderOpen())
{
renderer.Render(drawingContext, 0, 0);
}
formulaContainerElement.Visual = visual;
}
protected override void Write([NotNull] WpfRenderer renderer, [NotNull] MathInline obj)
{
var text = obj.Content.Text.Substring(obj.Content.Start, obj.Content.Length);
TexFormula formula = null;
try
{
formula = formulaParser.Parse(text);
}
catch (Exception)
{
renderer.WriteInline(new Run("[!!FORMULA PARSE ERROR!!]")
{
Tag = obj
});
return;
}
var fontSize = renderer.CurrentFontSize();
var formulaRenderer = formula.GetRenderer(TexStyle.Display, fontSize, "Arial");
var geo = formulaRenderer.RenderToGeometry(0, 0);
var geoD = new System.Windows.Media.GeometryDrawing(Brushes.Black, null, geo);
var di = new DrawingImage(geoD);
var uiImage = new System.Windows.Controls.Image()
{
Source = di
};
uiImage.Height = formulaRenderer.RenderSize.Height; // size image to match rendersize -> get a zoom of 100%
uiImage.Margin = new System.Windows.Thickness(0, 0, 0, -formulaRenderer.RenderSize.Height * formulaRenderer.RelativeDepth); // Move image so that baseline matches that of text
var uiInline = new System.Windows.Documents.InlineUIContainer()
{
Child = uiImage,
Background = Brushes.Yellow,
BaselineAlignment = System.Windows.BaselineAlignment.Baseline,
Tag = obj,
};
renderer.WriteInline(uiInline);
}
public void SaveGeometry(string filename)
{
TexFormulaParser formulaParser = new TexFormulaParser();
if (filename == null)
{
return;
}
// Create formula object from input text.
TexFormula formula = null;
try
{
formula = formulaParser.Parse(Formula);
}
catch (Exception ex)
{
MessageBox.Show("An error occurred while parsing the given input:" + Environment.NewLine +
Environment.NewLine + ex.Message, "WPF-Math Example", MessageBoxButton.OK, MessageBoxImage.Error);
}
// Create formula object from input text.
if (formula == null)
{
return;
}
var renderer = formula.GetRenderer(TexStyle.Display, Scale, SystemTextFontName);
using (var fs = new FileStream(filename, FileMode.Create, FileAccess.Write))
{
var geometry = renderer.RenderToGeometry(0, 0);
var svgPathText = ConvertGeometry(geometry);
var svgText = AddSVGHeader(svgPathText);
using (var writer = new StreamWriter(fs))
writer.WriteLine(svgText);
}
}
/// <inheritdoc/>
public (Stream bitmapStream, string placement, int yoffset, int width96thInch, int height96thInch) Parse(string text, string fontFamily, double fontSize, double dpiResolution, bool isIntendedForHelp1File)
{
TexFormula formula = null;
try
{
formula = _formulaParser.Parse(text);
}
catch (Exception)
{
return(null, null, 0, 0, 0);
}
double cyAscent;
double cyDescent;
double cyMiddle;
{
var gdiFont = new System.Drawing.Font(fontFamily, (float)fontSize, System.Drawing.FontStyle.Regular);
int iCellSpace = gdiFont.FontFamily.GetLineSpacing(gdiFont.Style);
int iEmHeight = gdiFont.FontFamily.GetEmHeight(gdiFont.Style);
int iCellAscent = gdiFont.FontFamily.GetCellAscent(gdiFont.Style);
int iCellDescent = gdiFont.FontFamily.GetCellDescent(gdiFont.Style);
cyAscent = fontSize * iCellAscent / iEmHeight;
cyDescent = fontSize * iCellDescent / iEmHeight;
cyMiddle = cyAscent / 3; // is only a first guess, details coming from the Wpf font
gdiFont.Dispose();
var ff = new FontFamily(fontFamily);
var tf = new Typeface(ff, System.Windows.FontStyles.Normal, System.Windows.FontWeights.Normal, System.Windows.FontStretches.Normal);
if (tf.TryGetGlyphTypeface(out var gtf))
{
cyMiddle = Math.Floor(fontSize * gtf.Height * gtf.StrikethroughPosition);
}
}
var formulaRenderer = formula.GetRenderer(TexStyle.Display, fontSize, fontFamily);
// the placement of the image depends on the depth value
var absoluteDepth = formulaRenderer.RenderSize.Height * formulaRenderer.RelativeDepth;
var absoluteAscent = formulaRenderer.RenderSize.Height * (1 - formulaRenderer.RelativeDepth);
double yoffset = 0;
BitmapSource bmp;
int width96thInch, height96thInch;
string alignment;
if (isIntendedForHelp1File)
{
// dictionary that holds the number of additional pixels neccessary to exactly align the formula, and the value is the alignment
var sort = new SortedDictionary <double, (double, string)>();
if (formulaRenderer.RelativeDepth < (1 / 16.0)) // if the formulas baseline is almost at the bottom of the image
{
sort.Add(0, (0.0, "baseline")); // then we can use baseline as vertical alight
}
if (absoluteAscent <= cyAscent) // if our formula is higher than the top of the text
{
yoffset = cyAscent - absoluteAscent;
sort.Add(Math.Abs(yoffset), (yoffset, "texttop")); // then we can use texttop alignment, and we shift the formula downwards (positive offset)
}
if (absoluteDepth <= cyDescent) // then we can use bottom alignment, and we shift the formula upwards (negative offset)
{
yoffset = absoluteDepth - cyDescent;
sort.Add(Math.Abs(yoffset), (yoffset, "bottom"));
}
{
// Alignment: middle
// Note that this is a moving target: we must change the vertical size of the image, but by that
// we change the middle of the image, which changes again the offset...
if (isIntendedForHelp1File)
{
yoffset = absoluteDepth - absoluteAscent; // in help1 file, the baseline of text is aligned with the middle of the image
}
else
{
yoffset = 2 * cyMiddle + absoluteDepth - absoluteAscent; // if yoffset is negative, then pad at the bottom, else pad at the top
}
sort.Add(Math.Abs(yoffset), (yoffset, "middle"));
}
var firstEntry = sort.First();
(bmp, width96thInch, height96thInch) = RenderToBitmap(formulaRenderer, 0, firstEntry.Value.Item1, dpiResolution);
alignment = firstEntry.Value.Item2;
yoffset = 0; // 0 as return value
}
else // MAML is intended for HTML help (so we can use HTML5 alignment with pixel accuracy )
{
alignment = "baseline";
var yshift = Math.Ceiling(absoluteAscent) - absoluteAscent; // we shift the formula downwards, so that the new absoluteAscent is Math.Ceiling(absoluteAscent)
// by providing a positive offset in arg2, the image is lowered compared to the baseline
(bmp, width96thInch, height96thInch) = RenderToBitmap(formulaRenderer, 0, yshift, dpiResolution);
yoffset = Math.Ceiling(absoluteAscent) - height96thInch; // number of pixels from image bottom to baseline (negative sign)
}
var fileStream = new MemoryStream();
BitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
encoder.Save(fileStream);
fileStream.Seek(0, SeekOrigin.Begin);
return(fileStream, alignment, (int)Math.Round(yoffset), width96thInch, height96thInch);
}
protected override void Write([NotNull] WpfRenderer renderer, [NotNull] MathBlock obj)
{
string text = string.Empty; // obj.Content.Text.Substring(obj.Content.Start, obj.Content.Length);
for (int i = 0; i < obj.Lines.Count; ++i)
{
var l = obj.Lines.Lines[i];
text += l.Slice.Text.Substring(l.Slice.Start, l.Slice.Length);
}
if (string.IsNullOrEmpty(text))
{
return;
}
TexFormula formula = null;
try
{
formula = formulaParser.Parse(text);
}
catch (Exception)
{
var paragraph = new Paragraph()
{
Tag = obj
};
renderer.Push(paragraph);
renderer.WriteInline(new Run("[!!FORMULA PARSE ERROR!!]")
{
Tag = obj
});
renderer.Pop();
return;
}
var fontSize = renderer.CurrentFontSize();
if (fontSize <= 0)
{
throw new InvalidProgramException();
}
var formulaRenderer = formula.GetRenderer(TexStyle.Display, fontSize, "Arial");
var geo = formulaRenderer.RenderToGeometry(0, 0);
var geoD = new System.Windows.Media.GeometryDrawing(Brushes.Black, null, geo);
var di = new DrawingImage(geoD);
var uiImage = new System.Windows.Controls.Image()
{
Source = di
};
uiImage.Height = formulaRenderer.RenderSize.Height; // size image to match rendersize -> get a zoom of 100%
// uiImage.Margin = new System.Windows.Thickness(0, 0, 0, -formulaRenderer.RenderSize.Height * formulaRenderer.RelativeDepth); // Move image so that baseline matches that of text
var uiBlock = new System.Windows.Documents.BlockUIContainer()
{
Child = uiImage,
Tag = obj,
};
renderer.WriteBlock(uiBlock);
}
private static Table genFormulaeTable(List <Formula> formulae, MainDocumentPart mainPart)
{
Table tableOfInputs = new Table();
var tableGrid = new TableGrid();
tableGrid.AppendChild(new GridColumn());
tableGrid.AppendChild(new GridColumn());
tableGrid.AppendChild(new GridColumn());
tableOfInputs.AppendChild(tableGrid);
var tableProps = new TableProperties();
tableProps.AppendChild(new TableLayout()
{
Type = TableLayoutValues.Fixed
});
tableProps.AppendChild(new TableWidth()
{
Width = "9000", Type = TableWidthUnitValues.Dxa
});
tableProps.AppendChild(new TableBorders()
{
InsideHorizontalBorder = new InsideHorizontalBorder()
{
Color = "c0c0c0", Size = 4, Val = BorderValues.Single
}
});
tableProps.AppendChild(new TableBorders()
{
BottomBorder = new BottomBorder()
{
Color = "c0c0c0", Size = 4, Val = BorderValues.Single
}
});
tableProps.AppendChild(new TableBorders()
{
TopBorder = new TopBorder()
{
Color = "c0c0c0", Size = 4, Val = BorderValues.Single
}
});
//tableProps.AppendChild(new TableBorders() { LeftBorder = new LeftBorder() { Color = "c0c0c0", Size = 4, Val = BorderValues.Single } });
//tableProps.AppendChild(new TableBorders() { InsideVerticalBorder = new InsideVerticalBorder() { Color = "c0c0c0", Size = 4, Val = BorderValues.Single } });
//tableProps.AppendChild(new TableBorders() { RightBorder = new RightBorder() { Color = "c0c0c0", Size = 4, Val = BorderValues.Single } });
tableOfInputs.AppendChild(tableProps);
foreach (var item in formulae)
{
TableRow row = new TableRow();
var para = new Paragraph();
para.AppendChild((new Run(new Text(item.Ref))));
TableCell cell1 = new TableCell();
cell1.Append(para);
cell1.Append(new TableCellProperties(new TableCellWidth()
{
Type = TableWidthUnitValues.Dxa, Width = "1200"
}));
TableCell cell2 = new TableCell();
cell2.Append(new TableCellProperties(new TableCellWidth()
{
Type = TableWidthUnitValues.Dxa, Width = "6100"
}));
cell2.AppendChild(new Paragraph(new Run(new Text(item.Narrative))));
//foreach (var formula in item.Expression)
//{
// var mathPara = new Paragraph();
// var myMath = new M.OfficeMath(new M.Run(new M.Text(formula + Environment.NewLine) { Space = SpaceProcessingModeValues.Preserve }));
// mathPara.AppendChild(myMath);
// mathPara.AppendChild(new Run(new Text(" ") { Space = SpaceProcessingModeValues.Preserve }));
// cell2.AppendChild(mathPara);
//}
foreach (var formula in item.Expression)
{
if (formula != "")
{
TexFormula formulaToParse = new TexFormula();
try
{
var parser = new TexFormulaParser();
formulaToParse = parser.Parse(formula);
}
catch (Exception)
{
var parser = new TexFormulaParser();
formulaToParse = parser.Parse("Error in LaTeX string...");
}
var test = formulaToParse.GetRenderer(TexStyle.Script, 100, "Franklin Gothic Book");
if (test.RenderSize.Width > 0 && test.RenderSize.Height > 0)
{
var formulaImage = formulaToParse.RenderToPng(100, 0, 0, "Franklin Gothic Book");
ImagePart imagePart = mainPart.AddImagePart(ImagePartType.Png);
using (var stream = new MemoryStream(formulaImage))
{
imagePart.FeedData(stream);
var img = new BitmapImage();
img.BeginInit();
img.StreamSource = stream;
img.CacheOption = BitmapCacheOption.OnLoad;
img.EndInit();
img.Freeze();
var paraImage = AddImageToBody(mainPart.GetIdOfPart(imagePart), img.Width * 2.54 / 600, img.Height * 2.54 / 600);
cell2.AppendChild(new Paragraph(new Run(paraImage)));
}
}
GC.WaitForPendingFinalizers();
}
//var myMath = new M.OfficeMath(new M.Run(new M.Text(formula + Environment.NewLine) { Space = SpaceProcessingModeValues.Preserve }));
//mathPara.AppendChild(myMath);
//mathPara.AppendChild(new Run(new Text(" ") { Space = SpaceProcessingModeValues.Preserve }));
//cell2.AppendChild(mathPara);
}
if (item.Image != null)
{
ImagePart imagePart = mainPart.AddImagePart(ImagePartType.Png);
var tempFile = Path.GetTempFileName();
PngBitmapEncoder png = new PngBitmapEncoder();
//CHANGEBITMAP
//png.Frames.Add(BitmapFrame.Create(item.Image));
var width = Math.Min(10d, item.Image.Width * 2.54 / 96);
var height = ((double)item.Image.Height / (double)item.Image.Width) * width;
using (SkiaSharp.SKWStream stm = new SkiaSharp.SKFileWStream(tempFile))
{
item.Image.Encode(stm, SkiaSharp.SKEncodedImageFormat.Png, 0);
}
using (FileStream stream = new FileStream(tempFile, FileMode.Open))
{
imagePart.FeedData(stream);
}
var paraImage = AddImageToBody(mainPart.GetIdOfPart(imagePart), width, height);
cell2.AppendChild(new Paragraph(new Run(paraImage)));
}
TableCell cell3 = new TableCell();
cell3.Append(new Paragraph(new Run(new Text(item.Conclusion))));
cell3.Append(new TableCellProperties(new TableCellWidth()
{
Type = TableWidthUnitValues.Dxa, Width = "1700"
}));
row.Append(cell1, cell2, cell3);
tableOfInputs.AppendChild(row);
}
return(tableOfInputs);
}
