private NameToken GetAddedFont(PdfDocumentBuilder.AddedFont font)
{
if (!documentFonts.TryGetValue(font.Id, out NameToken value))
{
value = NameToken.Create($"F{nextFontId++}");
var resources = pageDictionary.GetOrCreateDict(NameToken.Resources);
var fonts = resources.GetOrCreateDict(NameToken.Font);
while (fonts.ContainsKey(value))
{
value = NameToken.Create($"F{nextFontId++}");
}
documentFonts[font.Id] = value;
fonts[value] = font.Reference;
}
return(value);
}
/// <summary>
/// Draws the text in the provided font at the specified position and returns the letters which will be drawn.
/// </summary>
/// <param name="text">The text to draw to the page.</param>
/// <param name="fontSize">The size of the font in user space units.</param>
/// <param name="position">The position of the baseline (lower-left corner) to start drawing the text from.</param>
/// <param name="font">
/// A font added to the document using <see cref="PdfDocumentBuilder.AddTrueTypeFont"/>
/// or <see cref="PdfDocumentBuilder.AddStandard14Font"/> methods.
/// </param>
/// <returns>The letters from the input text with their corresponding size and position.</returns>
public IReadOnlyList <Letter> AddText(string text, decimal fontSize, PdfPoint position, PdfDocumentBuilder.AddedFont font)
{
if (font == null)
{
throw new ArgumentNullException(nameof(font));
}
if (text == null)
{
throw new ArgumentNullException(nameof(text));
}
if (!documentBuilder.Fonts.TryGetValue(font.Id, out var fontStore))
{
throw new ArgumentException($"No font has been added to the PdfDocumentBuilder with Id: {font.Id}. " +
$"Use {nameof(documentBuilder.AddTrueTypeFont)} to register a font.", nameof(font));
}
if (fontSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(fontSize), "Font size must be greater than 0");
}
var fontName = GetAddedFont(font);
var fontProgram = fontStore.FontProgram;
var fm = fontProgram.GetFontMatrix();
var textMatrix = TransformationMatrix.FromValues(1, 0, 0, 1, position.X, position.Y);
var letters = DrawLetters(fontName, text, fontProgram, fm, fontSize, textMatrix);
currentStream.Add(BeginText.Value);
currentStream.Add(new SetFontAndSize(fontName, fontSize));
currentStream.Add(new MoveToNextLineWithOffset((decimal)position.X, (decimal)position.Y));
var bytesPerShow = new List <byte>();
foreach (var letter in text)
{
if (char.IsWhiteSpace(letter))
{
currentStream.Add(new ShowText(bytesPerShow.ToArray()));
bytesPerShow.Clear();
}
var b = fontProgram.GetValueForCharacter(letter);
bytesPerShow.Add(b);
}
if (bytesPerShow.Count > 0)
{
currentStream.Add(new ShowText(bytesPerShow.ToArray()));
}
currentStream.Add(EndText.Value);
return(letters);
}
public PdfPageBuilder AddText(string text, decimal fontSize, PdfPoint position, PdfDocumentBuilder.AddedFont font)
{
if (font == null)
{
throw new ArgumentNullException(nameof(font));
}
if (text == null)
{
throw new ArgumentNullException(nameof(text));
}
if (!documentBuilder.Fonts.TryGetValue(font.Id, out var fontProgram))
{
throw new ArgumentException($"No font has been added to the PdfDocumentBuilder with Id: {font.Id}. " +
$"Use {nameof(documentBuilder.AddTrueTypeFont)} to register a font.", nameof(font));
}
if (fontSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(fontSize), "Font size must be greater than 0");
}
var width = CalculateGlyphSpaceTextWidth(text, fontProgram);
var fm = TransformationMatrix.FromValues(1 / 1000m, 0, 1 / 1000m, 0, 0, 0);
var widthRect = fm.Transform(new PdfRectangle(0, 0, width, 0));
try
{
var ctm = TransformationMatrix.FromValues(position.X, 0, position.Y, 0, 0, 0);
var realWidth = ctm.Transform(widthRect).Width;
if (realWidth + position.X > PageSize.Width)
{
throw new InvalidOperationException("Text would exceed the bounds.");
}
operations.Add(new ModifyCurrentTransformationMatrix(new[]
{
position.X, 0, position.Y, 0, 0, 0
}));
var beginText = BeginText.Value;
operations.Add(beginText);
operations.Add(new SetFontAndSize(font.Name, fontSize));
operations.Add(new ShowText(text));
operations.Add(EndText.Value);
beginText = null;
}
catch (Exception ex)
{
throw;
}
return(this);
}
/// <summary>
/// Calculates the size and position of each letter in a given string in the provided font without changing the state of the page.
/// </summary>
/// <param name="text">The text to measure each letter of.</param>
/// <param name="fontSize">The size of the font in user space units.</param>
/// <param name="position">The position of the baseline (lower-left corner) to start drawing the text from.</param>
/// <param name="font">
/// A font added to the document using <see cref="PdfDocumentBuilder.AddTrueTypeFont"/>
/// or <see cref="PdfDocumentBuilder.AddStandard14Font"/> methods.
/// </param>
/// <returns>The letters from the input text with their corresponding size and position.</returns>
public IReadOnlyList <Letter> MeasureText(string text, decimal fontSize, PdfPoint position, PdfDocumentBuilder.AddedFont font)
{
if (font == null)
{
throw new ArgumentNullException(nameof(font));
}
if (text == null)
{
throw new ArgumentNullException(nameof(text));
}
if (!documentBuilder.Fonts.TryGetValue(font.Id, out var fontStore))
{
throw new ArgumentException($"No font has been added to the PdfDocumentBuilder with Id: {font.Id}. " +
$"Use {nameof(documentBuilder.AddTrueTypeFont)} to register a font.", nameof(font));
}
if (fontSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(fontSize), "Font size must be greater than 0");
}
var fontProgram = fontStore.FontProgram;
var fm = fontProgram.GetFontMatrix();
var textMatrix = TransformationMatrix.FromValues(1, 0, 0, 1, position.X, position.Y);
var letters = DrawLetters(null, text, fontProgram, fm, fontSize, textMatrix);
return(letters);
}
public List <Letter> AddText(string text, decimal fontSize, PdfPoint position, PdfDocumentBuilder.AddedFont font)
{
if (font == null)
{
throw new ArgumentNullException(nameof(font));
}
if (text == null)
{
throw new ArgumentNullException(nameof(text));
}
if (!documentBuilder.Fonts.TryGetValue(font.Id, out var fontProgram))
{
throw new ArgumentException($"No font has been added to the PdfDocumentBuilder with Id: {font.Id}. " +
$"Use {nameof(documentBuilder.AddTrueTypeFont)} to register a font.", nameof(font));
}
if (fontSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(fontSize), "Font size must be greater than 0");
}
var fm = TransformationMatrix.FromValues(1 / 1000m, 0, 0, 1 / 1000m, 0, 0);
var textMatrix = TransformationMatrix.FromValues(1, 0, 0, 1, position.X, position.Y);
var letters = DrawLetters(text, fontProgram, fm, fontSize, textMatrix);
try
{
//var realWidth = widthRect.Width;
//if (realWidth + position.X > PageSize.Width)
//{
// throw new InvalidOperationException("Text would exceed the bounds.");
//}
var beginText = BeginText.Value;
operations.Add(beginText);
operations.Add(new SetFontAndSize(font.Name, fontSize));
operations.Add(new MoveToNextLineWithOffset(position.X, position.Y));
operations.Add(new ShowText(text));
operations.Add(EndText.Value);
beginText = null;
}
catch (Exception ex)
{
throw;
}
return(letters);
}
