/// <summary>
/// Page Text element at the X Y position; multiple lines handled
/// </summary>
/// <returns></returns>
internal void AddText(float x, float y, float height, float width, string[] sa,
StyleInfo si, PdfFonts fonts, float[] tw, bool bWrap, string url, bool bNoClip)
{
// Calculate the RGB colors e.g. RGB(255, 0, 0) = red = 1 0 0 rg
double r = si.Color.R;
double g = si.Color.G;
double b = si.Color.B;
r = Math.Round((r / 255), 3);
g = Math.Round((g / 255), 3);
b = Math.Round((b / 255), 3);
string pdfFont = fonts.GetPdfFont(si); // get the pdf font resource name
// Loop thru the lines of text
for (int i = 0; i < sa.Length; i++)
{
string text = sa[i];
float textwidth = tw[i];
// Calculate the x position
float startX = x + si.PaddingLeft; // TODO: handle tb_rl
float startY = y + si.PaddingTop + (i * si.FontSize); // TODO: handle tb_rl
if (si.WritingMode == WritingModeEnum.lr_tb)
{ // TODO: not sure what alignment means with tb_lr so I'll leave it out for now
switch (si.TextAlign)
{
case TextAlignEnum.Center:
if (width > 0)
{
startX = x + si.PaddingLeft + (width - si.PaddingLeft - si.PaddingRight) / 2 - textwidth / 2;
}
break;
case TextAlignEnum.Right:
if (width > 0)
{
startX = x + width - textwidth - si.PaddingRight;
}
break;
case TextAlignEnum.Left:
default:
break;
}
// Calculate the y position
switch (si.VerticalAlign)
{
case VerticalAlignEnum.Middle:
if (height <= 0)
{
break;
}
// calculate the middle of the region
startY = y + si.PaddingTop + (height - si.PaddingTop - si.PaddingBottom) / 2 - si.FontSize / 2;
// now go up or down depending on which line
if (sa.Length == 1)
{
break;
}
if (sa.Length % 2 == 0) // even number
{
startY = startY - ((sa.Length / 2 - i) * si.FontSize) + si.FontSize / 2;
}
else
{
startY = startY - ((sa.Length / 2 - i) * si.FontSize);
}
break;
case VerticalAlignEnum.Bottom:
if (height <= 0)
{
break;
}
startY = y + height - si.PaddingBottom - (si.FontSize * (sa.Length - i));
break;
case VerticalAlignEnum.Top:
default:
break;
}
}
// Draw background rectangle if needed (only put out on the first line, since we do whole rectangle)
if (!si.BackgroundColor.IsEmpty && height > 0 && width > 0 && i == 0)
{ // background color, height and width are specified
AddFillRect(x, y, width, height, si.BackgroundColor);
}
// Set the clipping path
if (height > 0 && width > 0)
{
if (bNoClip) // no clipping but we still want URL checking
{
elements.Append("\r\nq\t");
}
else
{
elements.AppendFormat(NumberFormatInfo.InvariantInfo,
"\r\nq\t{0} {1} {2} {3} re W n",
x, pSize.yHeight - y - height, width, height);
}
if (url != null)
{
p.AddHyperlink(x, pSize.yHeight - y, height, width, url);
}
}
else
{
elements.Append("\r\nq\t");
}
// Escape the text
string newtext = PdfUtility.UTF16StringQuoter(text);
//string newtext = text.Replace("\\", "\\\\");
//newtext = newtext.Replace("(", "\\(");
//newtext = newtext.Replace(")", "\\)");
if (si.WritingMode == WritingModeEnum.lr_tb)
{
elements.AppendFormat(NumberFormatInfo.InvariantInfo,
"\r\nBT/{0} {1} Tf\t{5} {6} {7} rg\t{2} {3} Td \t({4}) Tj\tET\tQ\t",
pdfFont, si.FontSize, startX, (pSize.yHeight - startY - si.FontSize), newtext, r, g, b);
}
else
{ // Rotate text -90 degrees=-.5 radians (this works for english don't know about true tb-rl language)
// had to play with reader to find best approximation for this rotation; didn't do what I expected
// see pdf spec section 4.2.2 pg 141 "Common Transformations"
elements.AppendFormat(NumberFormatInfo.InvariantInfo,
"\r\nBT/{0} {1} Tf\t{5} {6} {7} rg\t{8} {9} {10} {11} {2} {3} Tm \t({4}) Tj\tET\tQ\t",
pdfFont, si.FontSize, startX, (pSize.yHeight - startY), newtext, r, g, b,
radsCos, radsSin, -radsSin, radsCos);
}
// Handle underlining etc.
float maxX;
switch (si.TextDecoration)
{
case TextDecorationEnum.Underline:
maxX = width > 0? Math.Min(x + width, startX + textwidth): startX + textwidth;
AddLine(startX, startY + si.FontSize + 1, maxX, startY + si.FontSize + 1, 1, si.Color, BorderStyleEnum.Solid);
break;
case TextDecorationEnum.LineThrough:
maxX = width > 0? Math.Min(x + width, startX + textwidth): startX + textwidth;
AddLine(startX, startY + (si.FontSize / 2) + 1, maxX, startY + (si.FontSize / 2) + 1, 1, si.Color, BorderStyleEnum.Solid);
break;
case TextDecorationEnum.Overline:
maxX = width > 0? Math.Min(x + width, startX + textwidth): startX + textwidth;
AddLine(startX, startY + 1, maxX, startY + 1, 1, si.Color, BorderStyleEnum.Solid);
break;
case TextDecorationEnum.None:
default:
break;
}
}
AddBorder(si, x, y, height, width); // add any required border
return;
}
