/// <summary>
/// Paints the text decoration
/// </summary>
/// <param name="g"></param>
/// <param name="rectangle"> </param>
/// <param name="isFirst"> </param>
/// <param name="isLast"> </param>
private void PaintDecoration(Graphics g, RectangleF rectangle, bool isFirst, bool isLast)
{
if (string.IsNullOrEmpty(TextDecoration) || TextDecoration == CssConstants.None || IsImage)
{
return;
}
float desc = CssUtils.GetDescent(ActualFont);
float asc = CssUtils.GetAscent(ActualFont);
float y = 0f;
if (TextDecoration == CssConstants.Underline)
{
y = rectangle.Bottom - desc + 0.6f;
}
else if (TextDecoration == CssConstants.LineThrough)
{
y = rectangle.Bottom - desc - asc / 2;
}
else if (TextDecoration == CssConstants.Overline)
{
y = rectangle.Bottom - desc - asc - 2;
}
y -= ActualPaddingBottom - ActualBorderBottomWidth;
float x1 = rectangle.X;
float x2 = rectangle.Right;
if (isFirst)
{
x1 += ActualPaddingLeft + ActualBorderLeftWidth;
}
if (isLast)
{
x2 -= ActualPaddingRight + ActualBorderRightWidth;
x2 -= ActualWordSpacing + 0.8f * CssUtils.GetWordEndWhitespace(ActualFont);
}
g.DrawLine(new Pen(ActualColor), x1, y, x2, y);
}
/// <summary>
/// Recursively flows the content of the box using the inline model
/// </summary>
/// <param name="g">Device Info</param>
/// <param name="blockbox">Blockbox that contains the text flow</param>
/// <param name="box">Current box to flow its content</param>
/// <param name="maxright">Maximum reached right</param>
/// <param name="linespacing">Space to use between rows of text</param>
/// <param name="startx">x starting coordinate for when breaking lines of text</param>
/// <param name="line">Current linebox being used</param>
/// <param name="curx">Current x coordinate that will be the left of the next word</param>
/// <param name="cury">Current y coordinate that will be the top of the next word</param>
/// <param name="maxbottom">Maximum bottom reached so far</param>
private static void FlowBox(Graphics g, CssBox blockbox, CssBox box, float maxright, float linespacing, float startx, ref CssLineBox line, ref float curx, ref float cury, ref float maxbottom)
{
var startY = cury;
box.FirstHostingLineBox = line;
foreach (CssBox b in box.Boxes)
{
float leftspacing = b.ActualMarginLeft + b.ActualBorderLeftWidth + b.ActualPaddingLeft;
float rightspacing = b.ActualMarginRight + b.ActualBorderRightWidth + b.ActualPaddingRight;
b.RectanglesReset();
b.MeasureWordsSize(g);
curx += leftspacing;
if (b.Words.Count > 0)
{
// fix word space for first word in inline tag
if (!b.Words[0].IsImage && b.Words[0].HasSpaceBefore && b.Display == CssConstants.Inline)
{
var sib = DomUtils.GetPreviousContainingBlockSibling(b);
if (sib != null && sib.Display == CssConstants.Inline)
{
curx += b.ActualWordSpacing;
}
}
foreach (var word in b.Words)
{
if (maxbottom - cury < box.ActualLineHeight)
{
maxbottom += box.ActualLineHeight - (maxbottom - cury);
}
if ((b.WhiteSpace != CssConstants.Nowrap && curx + word.Width + rightspacing > maxright) || word.IsLineBreak)
{
curx = startx;
cury = maxbottom + linespacing;
line = new CssLineBox(blockbox);
if (word.IsImage || word.Equals(b.FirstWord))
{
curx += leftspacing;
}
}
// atodo: why?
line.ReportExistanceOf(word);
word.Left = curx; // -word.LastMeasureOffset.X + 1;
word.Top = cury; // - word.LastMeasureOffset.Y;
curx = word.Right + (word.IsImage ? b.ActualWordSpacing : 0); // +word.SpacesAfterWidth;
maxbottom = Math.Max(maxbottom, word.Bottom); //+ (word.IsImage ? topspacing + bottomspacing : 0));
}
// fix word space for last word that is right before inline tag
var lastWord = b.Words[b.Words.Count - 1];
if (!lastWord.IsImage && !lastWord.HasSpaceAfter)
{
var next = DomUtils.GetNextSibling(b);
if (next == null || next.Display == CssConstants.Inline)
{
curx -= b.ActualWordSpacing + CssUtils.GetWordEndWhitespace(b.ActualFont);
}
}
}
else
{
FlowBox(g, blockbox, b, maxright, linespacing, startx, ref line, ref curx, ref cury, ref maxbottom);
}
curx += rightspacing;
}
// handle height setting
if (maxbottom - startY < box.ActualHeight)
{
maxbottom += box.ActualHeight - (maxbottom - startY);
}
// handle box that is only a whitespace
if (box.Text == " " && !box.IsImage && box.IsInline && box.Boxes.Count == 0 && box.Words.Count == 0)
{
curx += box.ActualWordSpacing;
}
box.LastHostingLineBox = line;
}