private void resizeAndParse(string textToRender, int maxWidth, bool parseHTML)
{
if (m_reader != null)
m_reader = null;
m_reader = new Parser(textToRender, parseHTML);
m_href.Clear();
m_images.Clear();
if (maxWidth < 0)
{
m_width = 0;
}
else
{
if (maxWidth == 0)
{
getTextDimensions(m_reader, ASCIIText.MaxWidth, 0, out m_width, out m_height);
}
else
{
getTextDimensions(m_reader, maxWidth, 0, out m_width, out m_height);
}
}
if (m_texture != null)
{
m_texture.Dispose();
m_texture = null;
}
}
Texture2D writeTexture(GraphicsDevice graphics, Parser reader, int width, int height)
{
if (m_width == 0) // empty text string
return new Texture2D(graphics, 1, 1);
Color[] resultData = new Color[width * height];
// for (int i = 0; i < resultData.Length; i++)
// resultData[i] = Color.LimeGreen;
int dy = 0, lineheight = 0;
unsafe
{
fixed (Color* rPtr = resultData)
{
int[] alignedTextX = new int[3];
List<AHTMLAtom>[] alignedAtoms = new List<AHTMLAtom>[3];
for (int i = 0; i < 3; i++)
alignedAtoms[i] = new List<AHTMLAtom>();
for (int i = 0; i < reader.Length; i++)
{
AHTMLAtom atom = reader.Atoms[i];
alignedAtoms[(int)atom.Alignment].Add(atom);
if (atom.IsThisAtomALineBreak || (i == reader.Length - 1))
{
// write left aligned text.
int dx;
if (alignedAtoms[0].Count > 0)
{
alignedTextX[0] = dx = 0;
writeTexture_Line(alignedAtoms[0], rPtr, ref dx, dy, width, height, ref lineheight, true);
}
// centered text. We need to get the width first. Do this by drawing the line with var draw = false.
if (alignedAtoms[1].Count > 0)
{
dx = 0;
writeTexture_Line(alignedAtoms[1], rPtr, ref dx, dy, width, height, ref lineheight, false);
alignedTextX[1] = dx = width / 2 - dx / 2;
writeTexture_Line(alignedAtoms[1], rPtr, ref dx, dy, width, height, ref lineheight, true);
}
// right aligned text.
if (alignedAtoms[2].Count > 0)
{
dx = 0;
writeTexture_Line(alignedAtoms[2], rPtr, ref dx, dy, width, height, ref lineheight, false);
alignedTextX[2] = dx = width - dx;
writeTexture_Line(alignedAtoms[2], rPtr, ref dx, dy, width, height,ref lineheight, true);
}
// get HREF regions for html.
getHREFRegions(m_href, alignedAtoms, alignedTextX, dy);
// clear the aligned text lists so we can fill them up in our next pass.
for (int j = 0; j < 3; j++)
{
alignedAtoms[j].Clear();
}
dy += lineheight;
}
}
}
}
Texture2D result = new Texture2D(graphics, width, height, false, SurfaceFormat.Color);
result.SetData<Color>(resultData);
return result;
}
void getTextDimensions(Parser reader, int maxwidth, int maxheight, out int width, out int height)
{
width = 0; height = 0;
int lineheight = 0;
int widestline = 0;
int descenderheight = 0;
List<AHTMLAtom> word = new List<AHTMLAtom>();
int additionalwidth = 0; // for italic + outlined characters, which need a little more room for their slant/outline.
int word_width = 0;
for (int i = 0; i < reader.Length; ++i)
{
word_width += reader.Atoms[i].Width;
additionalwidth -= reader.Atoms[i].Width;
if (additionalwidth < 0)
additionalwidth = 0;
if (lineheight < reader.Atoms[i].Height)
lineheight = reader.Atoms[i].Height;
if (reader.Atoms[i].IsThisAtomALineBreak)
{
if (width + additionalwidth > widestline)
widestline = width + additionalwidth;
height += lineheight;
descenderheight = 0;
lineheight = 0;
width = 0;
}
else
{
word.Add(reader.Atoms[i]);
// we may need to add additional width for special style characters.
if (reader.Atoms[i] is HTMLAtomCharacter)
{
HTMLAtomCharacter atom = (HTMLAtomCharacter)reader.Atoms[i];
UniFont font = UniText.Fonts[(int)atom.Font];
UniCharacter ch = UniText.Fonts[(int)atom.Font].GetCharacter(atom.Character);
// italic characters need a little extra width if they are at the end of the line.
if (atom.Style_IsItalic)
additionalwidth = font.Height / 2;
if (atom.Style_IsOutlined)
additionalwidth += 1;
if (ch.YOffset + ch.Height - lineheight > descenderheight)
descenderheight = ch.YOffset + ch.Height - lineheight;
}
if (reader.Atoms[i].Alignment != Alignments.Left)
widestline = maxwidth;
if (i == reader.Length - 1 || reader.Atoms[i + 1].CanBreakAtThisAtom)
{
// Now make sure this line can fit the word.
if (width + word_width + additionalwidth <= maxwidth)
{
// it can fit!
width += word_width + additionalwidth;
word_width = 0;
word.Clear();
// if this word is followed by a space, does it fit? If not, drop it entirely and insert \n after the word.
if (!(i == reader.Length - 1) && reader.Atoms[i + 1].IsThisAtomABreakingSpace)
{
int charwidth = reader.Atoms[i + 1].Width;
if (width + charwidth <= maxwidth)
{
// we can fit an extra space here.
width += charwidth;
i++;
}
else
{
// can't fit an extra space on the end of the line. replace the space with a \n.
((HTMLAtomCharacter)reader.Atoms[i + 1]).Character = '\n';
}
}
}
else
{
// this word cannot fit in the current line.
if ((width > 0) && (i - word.Count >= 0))
{
// if this is the last word in a line. Replace the last space character with a line break
// and back up to the beginning of this word.
if (reader.Atoms[i - word.Count].IsThisAtomABreakingSpace)
{
((HTMLAtomCharacter)reader.Atoms[i - word.Count]).Character = '\n';
i = i - word.Count - 1;
}
else
{
reader.Atoms.Insert(i - word.Count, new HTMLAtomCharacter('\n'));
i = i - word.Count;
}
word.Clear();
word_width = 0;
}
else
{
// this is the only word on the line and we will need to split it.
// first back up until we've reached the reduced the size of the word
// so that it fits on one line, and split it there.
int iWordWidth = word_width;
for (int j = word.Count - 1; j >= 1; j--)
{
int iDashWidth = UniText.Fonts[(int)word[j].Font].GetCharacter('-').Width;
if (iWordWidth + iDashWidth <= maxwidth)
{
reader.Atoms.Insert(i - (word.Count - j) + 1, new HTMLAtomCharacter('\n'));
reader.Atoms.Insert(i - (word.Count - j) + 1, new HTMLAtomCharacter('-'));
break;
}
iWordWidth -= word[j].Width;
}
i -= word.Count + 2;
if (i < 0)
i = -1;
word.Clear();
width = 0;
word_width = 0;
}
}
}
}
}
width += additionalwidth;
height += lineheight + descenderheight;
if (widestline > width)
width = widestline;
}
