/// <summary>
/// Applies right alignment to the text on the linebox
/// </summary>
private static void ApplyRightAlignment(Graphics g, CssLineBox line)
{
if (line.Words.Count == 0)
{
return;
}
CssBoxWord lastWord = line.Words[line.Words.Count - 1];
float right = line.OwnerBox.ActualRight - line.OwnerBox.ActualPaddingRight - line.OwnerBox.ActualBorderRightWidth;
float diff = right - lastWord.Right - lastWord.LastMeasureOffset.X - lastWord.OwnerBox.ActualBorderRightWidth - lastWord.OwnerBox.ActualPaddingRight;
if (diff <= 0)
{
return;
}
//if (line.OwnerBox.Direction == CssConstants.Rtl)
//{
//}
foreach (CssBoxWord word in line.Words)
{
word.Left += diff;
}
foreach (CssBox b in line.Rectangles.Keys)
{
RectangleF r = b.Rectangles[line];
b.Rectangles[line] = new RectangleF(r.X + diff, r.Y, r.Width, r.Height);
}
}
private void CutWord()
{
if (_curword.Text.Length > 0)
{
Words.Add(_curword);
}
_curword = new CssBoxWord(Box);
}
/// <summary>
/// Lets the linebox add the word an its box to their lists if necessary.
/// </summary>
/// <param name="word"></param>
internal void ReportExistanceOf(CssBoxWord word)
{
if (!Words.Contains(word))
{
Words.Add(word);
}
if (!RelatedBoxes.Contains(word.OwnerBox))
{
RelatedBoxes.Add(word.OwnerBox);
}
}
/// <summary>
/// Splits the text on words using rules of the specified box
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public void SplitWords()
{
if (string.IsNullOrEmpty(Text))
{
return;
}
_curword = new CssBoxWord(Box);
bool onspace = IsSpace(Text[0]);
for (int 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>
/// Sets the baseline of the words of the specified box to certain height
/// </summary>
/// <param name="g">Device info</param>
/// <param name="b">box to check words</param>
/// <param name="baseline">baseline</param>
internal void SetBaseLine(Graphics g, CssBox b, float baseline)
{
//TODO: Aqui me quede, checar poniendo "by the" con un font-size de 3em
List <CssBoxWord> ws = WordsOf(b);
if (!Rectangles.ContainsKey(b))
{
return;
}
RectangleF r = Rectangles[b];
//Save top of words related to the top of rectangle
float gap = 0f;
if (ws.Count > 0)
{
gap = ws[0].Top - r.Top;
}
else
{
CssBoxWord firstw = b.FirstWordOccourence(b, this);
if (firstw != null)
{
gap = firstw.Top - r.Top;
}
}
//New top that words will have
//float newtop = baseline - (Height - OwnerBox.FontDescent - 3); //OLD
float newtop = baseline - GetBaseLineHeight(b, g); //OLD
if (b.ParentBox != null &&
b.ParentBox.Rectangles.ContainsKey(this) &&
r.Height < b.ParentBox.Rectangles[this].Height)
{
//Do this only if rectangle is shorter than parent's
float recttop = newtop - gap;
RectangleF newr = new RectangleF(r.X, recttop, r.Width, r.Height);
Rectangles[b] = newr;
b.OffsetRectangle(this, gap);
}
foreach (CssBoxWord w in ws)
{
if (!w.IsImage)
{
w.Top = newtop;
}
}
}
private CssBoxWordSplitter()
{
_words = new List <CssBoxWord>();
_curword = null;
}
/// <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
CssBoxWord word = new CssBoxWord(this, CssValue.GetImage(GetAttribute("src")));
Words.Clear();
Words.Add(word);
#endregion
}
else
{
#region Measure text words
bool lastWasSpace = false;
foreach (CssBoxWord b in Words)
{
bool collapse = CssBoxWordSplitter.CollapsesWhiteSpaces(this);
if (CssBoxWordSplitter.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
{
string word = b.Text;
CharacterRange[] measurable = { new CharacterRange(0, word.Length) };
StringFormat sf = new StringFormat();
sf.SetMeasurableCharacterRanges(measurable);
Region[] regions = g.MeasureCharacterRanges(word, ActualFont,
new RectangleF(0, 0, float.MaxValue, float.MaxValue),
sf);
SizeF s = regions[0].GetBounds(g).Size;
PointF 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>
/// Gets the longest word (in width) inside the box, deeply.
/// </summary>
/// <param name="b"></param>
/// <returns></returns>
private void GetMinimumWidth_LongestWord(CssBox b, ref float maxw, ref CssBoxWord word)
{
if (b.Words.Count > 0)
{
foreach (CssBoxWord w in b.Words)
{
if (w.FullWidth > maxw)
{
maxw = w.FullWidth;
word = w;
}
}
}
else
{
foreach(CssBox bb in b.Boxes)
GetMinimumWidth_LongestWord(bb, ref maxw,ref word);
}
}
/// <summary>
/// Splits the text into words and saves the result
/// </summary>
private void UpdateWords()
{
Words.Clear();
if (WhiteSpace == CssConstants.Nowrap)
{
CssBoxWord b = new CssBoxWord(this);
b.Text = Text;
Words.Add(b);
}
else
{
CssBoxWordSplitter splitter = new CssBoxWordSplitter(this, Text);
splitter.SplitWords();
Words.AddRange(splitter.Words);
}
}
/// <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)
{
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;
float topspacing = b.ActualBorderTopWidth + b.ActualPaddingTop;
float bottomspacing = b.ActualBorderBottomWidth + b.ActualPaddingTop;
b.RectanglesReset();
b.MeasureWordsSize(g);
curx += leftspacing;
if (b.Words.Count > 0)
{
#region Flow words
foreach (CssBoxWord word in b.Words)
{
//curx += word.SpacesBeforeWidth;
if ((b.WhiteSpace != CssConstants.Nowrap && curx + word.Width + rightspacing > maxright) ||
word.IsLineBreak)
{
#region Break line
curx = startx;
cury = maxbottom + linespacing;
line = new CssLineBox(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(CssBoxWord word)
{
if (!Words.Contains(word))
{
Words.Add(word);
}
if (!RelatedBoxes.Contains(word.OwnerBox))
{
RelatedBoxes.Add(word.OwnerBox);
}
}
/// <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)
{
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;
float topspacing = b.ActualBorderTopWidth + b.ActualPaddingTop;
float bottomspacing = b.ActualBorderBottomWidth + b.ActualPaddingTop;
b.RectanglesReset();
b.MeasureWordsSize(g);
curx += leftspacing;
if (b.Words.Count > 0)
{
#region Flow words
foreach (CssBoxWord word in b.Words)
{
//curx += word.SpacesBeforeWidth;
if ((b.WhiteSpace != CssConstants.Nowrap && curx + word.Width + rightspacing > maxright) ||
word.IsLineBreak)
{
#region Break line
curx = startx;
cury = maxbottom + linespacing;
line = new CssLineBox(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>
/// Splits the text on words using rules of the specified box
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public void SplitWords()
{
if (string.IsNullOrEmpty(Text)) return;
_curword = new CssBoxWord(Box);
bool onspace = IsSpace(Text[0]);
for (int 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();
}
private CssBoxWordSplitter()
{
_words = new List<CssBoxWord>();
_curword = null;
}
private void CutWord()
{
if(_curword.Text.Length > 0)
Words.Add(_curword);
_curword = new CssBoxWord(Box);
}