private void BreakLine()
{
// break segment at line break seg index into two segments
TextBoxSeg BreakSeg = SegArray[BreakSegIndex];
// add extra segment to segment array
if(BreakPtr != 0)
{
TextBoxSeg ExtraSeg = new TextBoxSeg(BreakSeg);
ExtraSeg.SegWidth = BreakWidth;
ExtraSeg.Text = BreakSeg.Text.Substring(0, BreakPtr);
SegArray.Insert(BreakSegIndex, ExtraSeg);
BreakSegIndex++;
}
// remove blanks from the area between the two sides of the segment
for(; BreakPtr < BreakSeg.Text.Length && BreakSeg.Text[BreakPtr] == ' '; BreakPtr++);
// save the area after the first line
if(BreakPtr < BreakSeg.Text.Length)
{
BreakSeg.Text = BreakSeg.Text.Substring(BreakPtr);
BreakSeg.SegWidth = BreakSeg.Font.TextWidth(BreakSeg.FontSize, BreakSeg.Text);
}
else
{
BreakSeg.Text = String.Empty;
BreakSeg.SegWidth = 0.0;
}
BreakPtr = 0;
BreakWidth = 0.0;
return;
}
/// <summary>
/// TextBox segment copy constructor.
/// </summary>
/// <param name="CopySeg">Source TextBox segment.</param>
public TextBoxSeg(
TextBoxSeg CopySeg
)
{
this.Font = CopySeg.Font;
this.FontSize = CopySeg.FontSize;
this.DrawStyle = CopySeg.DrawStyle;
this.FontColor = CopySeg.FontColor;
Text = String.Empty;
this.WebLink = CopySeg.WebLink;
return;
}
/// <summary>
/// TextBox segment copy constructor.
/// </summary>
/// <param name="CopySeg">Source TextBox segment.</param>
internal TextBoxSeg
(
TextBoxSeg CopySeg
)
{
Font = CopySeg.Font;
FontSize = CopySeg.FontSize;
DrawStyle = CopySeg.DrawStyle;
FontColor = CopySeg.FontColor;
Text = string.Empty;
AnnotAction = CopySeg.AnnotAction;
}
/// <summary>
/// TextBox segment copy constructor.
/// </summary>
/// <param name="CopySeg">Source TextBox segment.</param>
internal TextBoxSeg
(
TextBoxSeg CopySeg
)
{
this.Font = CopySeg.Font;
this.FontSize = CopySeg.FontSize;
this.DrawStyle = CopySeg.DrawStyle;
this.FontColor = CopySeg.FontColor;
Text = String.Empty;
this.AnnotAction = CopySeg.AnnotAction;
return;
}
/// <summary>
/// TextBox segment copy constructor.
/// </summary>
/// <param name="CopySeg">Source TextBox segment.</param>
public TextBoxSeg(
TextBoxSeg CopySeg
)
{
this.Font = CopySeg.Font;
this.FontSize = CopySeg.FontSize;
this.DrawStyle = CopySeg.DrawStyle;
this.FontColor = CopySeg.FontColor;
Text = String.Empty;
this.WebLink = CopySeg.WebLink;
return;
}
/// <summary>
/// TextBoxLine constructor.
/// </summary>
/// <param name="Ascent">Line ascent.</param>
/// <param name="Descent">Line descent.</param>
/// <param name="EndOfParagraph">Line is end of paragraph.</param>
/// <param name="SegArray">Segments' array.</param>
public TextBoxLine(
Double Ascent,
Double Descent,
Boolean EndOfParagraph,
TextBoxSeg[] SegArray
)
{
this.Ascent = Ascent;
this.Descent = Descent;
this.EndOfParagraph = EndOfParagraph;
this.SegArray = SegArray;
return;
}
private void BreakLine()
{
// break segment at line break seg index into two segments
TextBoxSeg BreakSeg = SegArray[BreakSegIndex];
// add extra segment to segment array
if(BreakPtr != 0)
{
TextBoxSeg ExtraSeg = new TextBoxSeg(BreakSeg);
ExtraSeg.SegWidth = BreakWidth;
ExtraSeg.Text = BreakSeg.Text.Substring(0, BreakPtr);
SegArray.Insert(BreakSegIndex, ExtraSeg);
BreakSegIndex++;
}
// remove blanks from the area between the two sides of the segment
for(; BreakPtr < BreakSeg.Text.Length && BreakSeg.Text[BreakPtr] == ' '; BreakPtr++);
// save the area after the first line
if(BreakPtr < BreakSeg.Text.Length)
{
BreakSeg.Text = BreakSeg.Text.Substring(BreakPtr);
BreakSeg.SegWidth = BreakSeg.Font.TextWidth(BreakSeg.FontSize, BreakSeg.Text);
}
else
{
BreakSeg.Text = String.Empty;
BreakSeg.SegWidth = 0.0;
}
BreakPtr = 0;
BreakWidth = 0.0;
return;
}
private void AddLine(
Boolean EndOfParagraph
)
{
// end of paragraph
if(EndOfParagraph) BreakSegIndex = SegArray.Count;
// test for box too narrow
if(BreakSegIndex < 1) throw new ApplicationException("TextBox is too narrow.");
// test for possible trailing blanks
if(SegArray[BreakSegIndex - 1].Text.EndsWith(" "))
{
// remove trailing blanks
while(BreakSegIndex > 0)
{
TextBoxSeg TempSeg = SegArray[BreakSegIndex - 1];
TempSeg.Text = TempSeg.Text.TrimEnd(new Char[] {' '});
TempSeg.SegWidth = TempSeg.Font.TextWidth(TempSeg.FontSize, TempSeg.Text);
if(TempSeg.Text.Length != 0 || BreakSegIndex == 1 && EndOfParagraph) break;
BreakSegIndex--;
SegArray.RemoveAt(BreakSegIndex);
}
}
// test for abnormal case of a blank line and not end of paragraph
if(BreakSegIndex > 0)
{
// allocate segment array
TextBoxSeg[] LineSegArray = new TextBoxSeg[BreakSegIndex];
// copy segments
SegArray.CopyTo(0, LineSegArray, 0, BreakSegIndex);
// line ascent and descent
Double LineAscent = 0;
Double LineDescent = 0;
// loop for segments until line break segment index
foreach(TextBoxSeg Seg in LineSegArray)
{
Double Ascent = Seg.Font.AscentPlusLeading(Seg.FontSize);
if(Ascent > LineAscent) LineAscent = Ascent;
Double Descent = Seg.Font.DescentPlusLeading(Seg.FontSize);
if(Descent > LineDescent) LineDescent = Descent;
Int32 SpaceCount = 0;
foreach(Char Chr in Seg.Text) if(Chr == ' ') SpaceCount++;
Seg.SpaceCount = SpaceCount;
}
// add line
LineArray.Add(new TextBoxLine(LineAscent, LineDescent, EndOfParagraph, LineSegArray));
// update column height
BoxHeight += LineAscent + LineDescent;
// update paragraph count
if(EndOfParagraph) ParagraphCount++;
// remove segments
SegArray.RemoveRange(0, BreakSegIndex);
}
// switch to next line
LineBreakWidth = 0.0;
BreakSegIndex = 0;
// new line width
LineWidth = 0.0;
foreach(TextBoxSeg Seg in SegArray) LineWidth += Seg.SegWidth;
return;
}
/// <summary>
/// Add text to text box.
/// </summary>
/// <param name="Font">Font</param>
/// <param name="FontSize">Font size</param>
/// <param name="DrawStyle">Drawing style</param>
/// <param name="FontColor">Text color</param>
/// <param name="Text">Text</param>
/// <param name="WebLink">Web link</param>
public void AddText(
PdfFont Font,
Double FontSize,
DrawStyle DrawStyle,
Color FontColor,
String Text,
String WebLink = null
)
{
// text is null or empty
if(String.IsNullOrEmpty(Text)) return;
// create new text segment
TextBoxSeg Seg;
// segment array is empty or new segment is different than last one
if(SegArray.Count == 0 || !SegArray[SegArray.Count - 1].IsEqual(Font, FontSize, DrawStyle, FontColor, WebLink))
{
Seg = new TextBoxSeg(Font, FontSize, DrawStyle, FontColor, WebLink);
SegArray.Add(Seg);
}
// add new text to most recent text segment
else
{
Seg = SegArray[SegArray.Count - 1];
}
// save text start pointer
Int32 TextStart = 0;
// loop for characters
for(Int32 TextPtr = 0; TextPtr < Text.Length; TextPtr++)
{
// shortcut to current character
Char CurChar = Text[TextPtr];
// end of paragraph
if(CurChar == '\n' || CurChar == '\r')
{
// append text to current segemnt
Seg.Text += Text.Substring(TextStart, TextPtr - TextStart);
// test for new line after carriage return
if(CurChar == '\r' && TextPtr + 1 < Text.Length && Text[TextPtr + 1] == '\n') TextPtr++;
// move pointer to one after the eol
TextStart = TextPtr + 1;
// add line
AddLine(true);
// update last character
PrevChar = ' ';
// end of text
if(TextPtr + 1 == Text.Length) return;
// add new empty segment
Seg = new TextBoxSeg(Font, FontSize, DrawStyle, FontColor, WebLink);
SegArray.Add(Seg);
continue;
}
// validate character
Font.ValidateChar(CurChar);
// character width
Double CharWidth = Font.CharWidth(FontSize, Seg.DrawStyle, CurChar);
// space
if(CurChar == ' ')
{
// test for transition from non space to space
// this is a potential line break point
if(PrevChar != ' ')
{
// save potential line break information
LineBreakWidth = LineWidth;
BreakSegIndex = SegArray.Count - 1;
BreakPtr = Seg.Text.Length + TextPtr - TextStart;
BreakWidth = Seg.SegWidth;
}
// add to line width
LineWidth += CharWidth;
Seg.SegWidth += CharWidth;
// update last character
PrevChar = CurChar;
continue;
}
// add current segment width and to overall line width
Seg.SegWidth += CharWidth;
LineWidth += CharWidth;
// for next loop set last character
PrevChar = CurChar;
Double Width = BoxWidth;
if(FirstLineIndent != 0 && (LineArray.Count == 0 || LineArray[LineArray.Count - 1].EndOfParagraph)) Width -= FirstLineIndent;
// current line width is less than or equal box width
if(LineWidth <= Width) continue;
// append text to current segemnt
Seg.Text += Text.Substring(TextStart, TextPtr - TextStart + 1);
TextStart = TextPtr + 1;
// there are no breaks in this line or last segment is too long
if(LineBreakWidth < LineBreakFactor * Width)
{
BreakSegIndex = SegArray.Count - 1;
BreakPtr = Seg.Text.Length - 1;
BreakWidth = Seg.SegWidth - CharWidth;
}
// break line
BreakLine();
// add line up to break point
AddLine(false);
}
// save text
Seg.Text += Text.Substring(TextStart);
// exit
return;
}
private void AddLine
(
bool EndOfParagraph
)
{
// end of paragraph
if (EndOfParagraph)
{
BreakSegIndex = SegArray.Count;
}
// test for box too narrow
if (BreakSegIndex < 1)
{
throw new ApplicationException("TextBox is too narrow.");
}
// test for possible trailing blanks
if (SegArray[BreakSegIndex - 1].Text.EndsWith(" "))
{
// remove trailing blanks
while (BreakSegIndex > 0)
{
TextBoxSeg TempSeg = SegArray[BreakSegIndex - 1];
TempSeg.Text = TempSeg.Text.TrimEnd(new char[] { ' ' });
TempSeg.SegWidth = TempSeg.Font.TextWidth(TempSeg.FontSize, TempSeg.Text);
if (TempSeg.Text.Length != 0 || BreakSegIndex == 1 && EndOfParagraph)
{
break;
}
BreakSegIndex--;
SegArray.RemoveAt(BreakSegIndex);
}
}
// test for abnormal case of a blank line and not end of paragraph
if (BreakSegIndex > 0)
{
// allocate segment array
TextBoxSeg[] LineSegArray = new TextBoxSeg[BreakSegIndex];
// copy segments
SegArray.CopyTo(0, LineSegArray, 0, BreakSegIndex);
// line ascent and descent
double LineAscent = 0;
double LineDescent = 0;
// loop for segments until line break segment index
foreach (TextBoxSeg Seg in LineSegArray)
{
double Ascent = Seg.Font.AscentPlusLeading(Seg.FontSize);
if (Ascent > LineAscent)
{
LineAscent = Ascent;
}
double Descent = Seg.Font.DescentPlusLeading(Seg.FontSize);
if (Descent > LineDescent)
{
LineDescent = Descent;
}
int SpaceCount = 0;
foreach (char Chr in Seg.Text)
{
if (Chr == ' ')
{
SpaceCount++;
}
}
Seg.SpaceCount = SpaceCount;
}
// add line
LineArray.Add(new TextBoxLine(LineAscent, LineDescent, EndOfParagraph, LineSegArray));
// update column height
BoxHeight += LineAscent + LineDescent;
// update paragraph count
if (EndOfParagraph)
{
ParagraphCount++;
}
// remove segments
SegArray.RemoveRange(0, BreakSegIndex);
}
// switch to next line
LineBreakWidth = 0.0;
BreakSegIndex = 0;
// new line width
LineWidth = 0.0;
foreach (TextBoxSeg Seg in SegArray)
{
LineWidth += Seg.SegWidth;
}
return;
}
/// <summary>
/// Add text to text box.
/// </summary>
/// <param name="Font">Font</param>
/// <param name="FontSize">Font size</param>
/// <param name="DrawStyle">Drawing style</param>
/// <param name="FontColor">Text color</param>
/// <param name="Text">Text</param>
/// <param name="AnnotAction">Web link</param>
public void AddText
(
PdfFont Font,
double FontSize,
DrawStyle DrawStyle,
Color FontColor,
string Text,
AnnotAction AnnotAction
)
{
// text is null or empty
if (string.IsNullOrEmpty(Text))
{
return;
}
// create new text segment
TextBoxSeg Seg;
// segment array is empty or new segment is different than last one
if (SegArray.Count == 0 || !SegArray[SegArray.Count - 1].IsEqual(Font, FontSize, DrawStyle, FontColor, AnnotAction))
{
Seg = new TextBoxSeg(Font, FontSize, DrawStyle, FontColor, AnnotAction);
SegArray.Add(Seg);
}
// add new text to most recent text segment
else
{
Seg = SegArray[SegArray.Count - 1];
}
// save text start pointer
int TextStart = 0;
// loop for characters
for (int TextPtr = 0; TextPtr < Text.Length; TextPtr++)
{
// shortcut to current character
char CurChar = Text[TextPtr];
// end of paragraph
if (CurChar == '\n' || CurChar == '\r')
{
// append text to current segemnt
Seg.Text += Text.Substring(TextStart, TextPtr - TextStart);
// test for new line after carriage return
if (CurChar == '\r' && TextPtr + 1 < Text.Length && Text[TextPtr + 1] == '\n')
{
TextPtr++;
}
// move pointer to one after the eol
TextStart = TextPtr + 1;
// add line
AddLine(true);
// update last character
PrevChar = ' ';
// end of text
if (TextPtr + 1 == Text.Length)
{
return;
}
// add new empty segment
Seg = new TextBoxSeg(Font, FontSize, DrawStyle, FontColor, AnnotAction);
SegArray.Add(Seg);
continue;
}
// character width
double CharWidth = Font.CharWidth(FontSize, Seg.DrawStyle, CurChar);
// space
if (CurChar == ' ')
{
// test for transition from non space to space
// this is a potential line break point
if (PrevChar != ' ')
{
// save potential line break information
LineBreakWidth = LineWidth;
BreakSegIndex = SegArray.Count - 1;
BreakPtr = Seg.Text.Length + TextPtr - TextStart;
BreakWidth = Seg.SegWidth;
}
// add to line width
LineWidth += CharWidth;
Seg.SegWidth += CharWidth;
// update last character
PrevChar = CurChar;
continue;
}
// add current segment width and to overall line width
Seg.SegWidth += CharWidth;
LineWidth += CharWidth;
// for next loop set last character
PrevChar = CurChar;
// box width
double Width = BoxWidth;
if (FirstLineIndent != 0 && (LineArray.Count == 0 || LineArray[LineArray.Count - 1].EndOfParagraph))
{
Width -= FirstLineIndent;
}
// current line width is less than or equal box width
if (LineWidth <= Width)
{
continue;
}
// append text to current segemnt
Seg.Text += Text.Substring(TextStart, TextPtr - TextStart + 1);
TextStart = TextPtr + 1;
// there are no breaks in this line or last segment is too long
if (LineBreakWidth < LineBreakFactor * Width)
{
BreakSegIndex = SegArray.Count - 1;
BreakPtr = Seg.Text.Length - 1;
BreakWidth = Seg.SegWidth - CharWidth;
}
// break line
BreakLine();
// add line up to break point
AddLine(false);
}
// save text
Seg.Text += Text.Substring(TextStart);
// exit
return;
}
