/// <summary>
/// Simplest alignment, just arrange words.
/// </summary>
/// <param name="g"></param>
/// <param name="lineBox"></param>
private static void ApplyLeftAlignment(Graphics g, CssLineBox line)
{
//No alignment needed.
//foreach (LineBoxRectangle r in line.Rectangles)
//{
// float curx = r.Left + (r.Index == 0 ? r.OwnerBox.ActualPaddingLeft + r.OwnerBox.ActualBorderLeftWidth / 2 : 0);
// if (r.SpaceBefore) curx += r.OwnerBox.ActualWordSpacing;
// foreach (BoxWord word in r.Words)
// {
// word.Left = curx;
// word.Top = r.Top;// +r.OwnerBox.ActualPaddingTop + r.OwnerBox.ActualBorderTopWidth / 2;
// curx = word.Right + r.OwnerBox.ActualWordSpacing;
// }
//}
}
/// <summary>
/// Applies centered alignment to the text on the linebox
/// </summary>
/// <param name="g"></param>
/// <param name="lineBox"></param>
private static void ApplyJustifyAlignment(Graphics g, CssLineBox lineBox)
{
if (lineBox.Equals(lineBox.OwnerBox.LineBoxes[lineBox.OwnerBox.LineBoxes.Count - 1]))
{
return;
}
float indent = lineBox.Equals(lineBox.OwnerBox.LineBoxes[0]) ? lineBox.OwnerBox.ActualTextIndent : 0f;
float textSum = 0f;
float words = 0f;
float availWidth = lineBox.OwnerBox.ClientRectangle.Width - indent;
#region Gather text sum
foreach (CssBoxWord w in lineBox.Words)
{
textSum += w.Width;
words += 1f;
}
#endregion
if (words <= 0f)
{
return; //Avoid Zero division
}
float spacing = (availWidth - textSum) / words; //Spacing that will be used
float curx = lineBox.OwnerBox.ClientLeft + indent;
foreach (CssBoxWord word in lineBox.Words)
{
word.Left = curx;
curx = word.Right + spacing;
if (word == lineBox.Words[lineBox.Words.Count - 1])
{
word.Left = lineBox.OwnerBox.ClientRight - word.Width;
}
//TODO: Background rectangles are being deactivated when justifying text.
}
}
/// <summary>
/// Creates line boxes for the specified blockbox
/// </summary>
/// <param name="g"></param>
/// <param name="blockBox"></param>
public static void CreateLineBoxes(Graphics g, CssBox blockBox)
{
blockBox.LineBoxes.Clear();
float maxRight = blockBox.ActualRight - blockBox.ActualPaddingRight - blockBox.ActualBorderRightWidth;
//Get the start x and y of the blockBox
float startx = blockBox.Location.X + blockBox.ActualPaddingLeft - 0 + blockBox.ActualBorderLeftWidth;
//TODO: Check for floats
float starty = blockBox.Location.Y + blockBox.ActualPaddingTop - 0 + blockBox.ActualBorderTopWidth;
float curx = startx + blockBox.ActualTextIndent;
float cury = starty;
//Reminds the maximum bottom reached
float maxBottom = starty;
//Extra amount of spacing that should be applied to lines when breaking them.
float lineSpacing = 0f;
//First line box
var line = new CssLineBox(blockBox);
//Flow words and boxes
FlowBox(g, blockBox, blockBox, maxRight, lineSpacing, startx, ref line, ref curx, ref cury, ref maxBottom);
//Gets the rectangles foreach linebox
foreach (CssLineBox linebox in blockBox.LineBoxes)
{
BubbleRectangles(blockBox, linebox);
linebox.AssignRectanglesToBoxes();
ApplyAlignment(g, linebox);
if (blockBox.Direction == CssConstants.Rtl)
{
ApplyRightToLeft(linebox);
}
//linebox.DrawRectangles(g);
}
blockBox.ActualBottom = maxBottom + blockBox.ActualPaddingBottom + blockBox.ActualBorderBottomWidth;
}
/// <summary>
/// Applies right alignment to the text on the linebox
/// </summary>
/// <param name="g"></param>
/// <param name="lineBox"></param>
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);
}
}
/// <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;
}
