/// <summary>
/// Splits the text on words using rules of the specified box
/// </summary>
/// <returns></returns>
public void SplitWords()
{
if (string.IsNullOrEmpty(Text)) return;
_curword = new BoxWord(Box);
var onspace = IsSpace(Text[0]);
for (var i = 0; i < Text.Length; i++)
{
if (IsSpace(Text[i]))
{
if (!onspace) CutWord();
if (IsLineBreak(Text[i]))
{
_curword.AppendChar('\n');
CutWord();
}
else if (IsTab(Text[i]))
{
_curword.AppendChar('\t');
CutWord();
}
else
{
_curword.AppendChar(' ');
}
onspace = true;
}
else
{
if (onspace) CutWord();
_curword.AppendChar(Text[i]);
onspace = false;
}
}
CutWord();
}
/// <summary>
/// Gets the longest word (in width) inside the box, deeply.
/// </summary>
/// <param name="b"></param>
/// <param name="maxw"></param>
/// <param name="word"></param>
/// <returns></returns>
private void GetMinimumWidth_LongestWord(Box b, ref float maxw, ref BoxWord word)
{
if (b.Words.Count > 0)
{
foreach (var w in b.Words)
{
if (!(w.FullWidth > maxw)) continue;
maxw = w.FullWidth;
word = w;
}
}
else
{
foreach (var bb in b.Boxes)
GetMinimumWidth_LongestWord(bb, ref maxw, ref word);
}
}
/// <summary>
/// Assigns words its width and height
/// </summary>
/// <param name="g"></param>
internal void MeasureWordsSize(Graphics g)
{
if (_wordsSizeMeasured) return;
//Measure white space if not yet done
if (float.IsNaN(_actualWordSpacing))
MeasureWordSpacing(g);
if (HtmlTag != null && HtmlTag.TagName.Equals("img", StringComparison.CurrentCultureIgnoreCase))
{
#region Measure image
var word = new BoxWord(this, Value.GetImage(GetAttribute("src")));
Words.Clear();
Words.Add(word);
#endregion
}
else
{
#region Measure text words
var lastWasSpace = false;
foreach (var b in Words)
{
var collapse = BoxWordSplitter.CollapsesWhiteSpaces(this);
if (BoxWordSplitter.EliminatesLineBreaks(this)) b.ReplaceLineBreaksAndTabs();
if (b.IsSpaces)
{
b.Height = FontLineSpacing;
if (b.IsTab)
{
b.Width = ActualWordSpacing*4; //TODO: Configure tab size
}
else if (b.IsLineBreak)
{
b.Width = 0;
}
else
{
if (!(lastWasSpace && collapse))
{
b.Width = ActualWordSpacing*(collapse ? 1 : b.Text.Length);
}
}
lastWasSpace = true;
}
else
{
var word = b.Text;
CharacterRange[] measurable = {new CharacterRange(0, word.Length)};
var sf = new StringFormat();
sf.SetMeasurableCharacterRanges(measurable);
var regions = g.MeasureCharacterRanges(word, ActualFont,
new RectangleF(0, 0, float.MaxValue, float.MaxValue),
sf);
var s = regions[0].GetBounds(g).Size;
var p = regions[0].GetBounds(g).Location;
b.LastMeasureOffset = new PointF(p.X, p.Y);
b.Width = s.Width; // +p.X;
b.Height = s.Height; // +p.Y;
lastWasSpace = false;
}
}
#endregion
}
_wordsSizeMeasured = true;
}
/// <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, Box blockbox, Box box, float maxright, float linespacing,
float startx, ref LineBox line, ref float curx, ref float cury, ref float maxbottom)
{
box.FirstHostingLineBox = line;
foreach (var b in box.Boxes)
{
var leftspacing = b.ActualMarginLeft + b.ActualBorderLeftWidth + b.ActualPaddingLeft;
var rightspacing = b.ActualMarginRight + b.ActualBorderRightWidth + b.ActualPaddingRight;
var topspacing = b.ActualBorderTopWidth + b.ActualPaddingTop;
var bottomspacing = b.ActualBorderBottomWidth + b.ActualPaddingTop;
b.RectanglesReset();
b.MeasureWordsSize(g);
curx += leftspacing;
if (b.Words.Count > 0)
{
#region Flow words
foreach (var word in b.Words)
{
//curx += word.SpacesBeforeWidth;
if ((b.WhiteSpace != Constants.Nowrap && curx + word.Width + rightspacing > maxright) ||
word.IsLineBreak)
{
#region Break line
curx = startx;
cury = maxbottom + linespacing;
line = new LineBox(blockbox);
if (word.IsImage || word.Equals(b.FirstWord))
{
curx += leftspacing;
}
#endregion
}
line.ReportExistanceOf(word);
word.Left = curx; // -word.LastMeasureOffset.X + 1;
word.Top = cury; // - word.LastMeasureOffset.Y;
curx = word.Right; // +word.SpacesAfterWidth;
maxbottom = Math.Max(maxbottom, word.Bottom);
//+ (word.IsImage ? topspacing + bottomspacing : 0));
_lastTreatedWord = word;
}
#endregion
}
else
{
FlowBox(g, blockbox, b, maxright, linespacing, startx, ref line, ref curx, ref cury, ref maxbottom);
}
curx += rightspacing;
}
box.LastHostingLineBox = line;
}
/// <summary>
/// Lets the linebox add the word an its box to their lists if necessary.
/// </summary>
/// <param name="word"></param>
internal void ReportExistanceOf(BoxWord word)
{
if (!Words.Contains(word))
{
Words.Add(word);
}
if (!RelatedBoxes.Contains(word.OwnerBox))
{
RelatedBoxes.Add(word.OwnerBox);
}
}
private BoxWordSplitter()
{
Words = new List<BoxWord>();
_curword = null;
}
private void CutWord()
{
if (_curword.Text.Length > 0)
Words.Add(_curword);
_curword = new BoxWord(Box);
}