/**
* private ctor used for fit'ing
*/
private HorizontalArea(Area[] content, Area source) : base(content, source)
{
// calulate bounding box
BoundingBox box = BoundingBox.New();
foreach (Area a in content)
{
box.Append(a.BoundingBox);
}
this.box = box;
}
public override AreaRegion GetEditRegion(IFormattingContext context, float x, float y, int index)
{
// measure horizontal position of char:
BoundingBox horz = BoundingBox.New();
float left, right;
for (int i = 0; i < index && i < content.Length; i++)
{
BoundingBox tmp = BoundingBox.New();
context.MeasureGlyph(font, content[i], out tmp, out left, out right);
horz.Append(tmp);
}
return(new AreaRegion(this, x + horz.Width, y));
}
/**
* create a string area
*/
public StringArea(IFormattingContext context, string content)
{
this.font = context.GetFont();
this.content = content;
box = BoundingBox.New();
float left = 0, right = 0;
for(int i = 0; i < content.Length; i++)
{
BoundingBox tmp = BoundingBox.New();
context.MeasureGlyph(font, content[i], out tmp, out left, out right);
box.Append(tmp);
// left edge of first char
if(i == 0)
{
leftEdge = left;
}
}
// right edge of last char
rightEdge = right;
}
/**
* create a string area
*/
public StringArea(IFormattingContext context, string content)
{
this.font = context.GetFont();
this.content = content;
box = BoundingBox.New();
float left = 0, right = 0;
for (int i = 0; i < content.Length; i++)
{
BoundingBox tmp = BoundingBox.New();
context.MeasureGlyph(font, content[i], out tmp, out left, out right);
box.Append(tmp);
// left edge of first char
if (i == 0)
{
leftEdge = left;
}
}
// right edge of last char
rightEdge = right;
}
object MathML.MathMLVisitor.Visit(MathMLPresentationContainer e, object args)
{
IFormattingContext context = ((IFormattingContext)args).Clone();
MathMLNodeList arguments = e.Arguments;
BoundingBox extent = BoundingBox.New();
int stretchCount = 0;
// save the stretch size because stretch scope can not extend into another
// level of nesting
BoundingBox stretch = context.Stretch;
context.Stretch = BoundingBox.New();
// process all nodes that are not stretchy operators, get thier total
// extents
for (int i = 0; i < arguments.Count; i++)
{
MathMLElement element = (MathMLElement)arguments[i];
MathMLOperatorElement op = element as MathMLOperatorElement;
if (op == null || op.Stretchy == false)
{
//areas[i] = (Area)element.Accept(this, context);
extent.Append((BoundingBox)element.Accept(this, context));
}
if (op != null && op.Stretchy)
{
stretchCount++;
}
}
// if we have any elements that can be stretched, stretch them
if (stretchCount > 0)
{
if (!stretch.Defined)
{
// avail width is epsilon because stretchy glyphs were not counted in the
// width calculation
context.Stretch = BoundingBox.New(Single.Epsilon, extent.Height, extent.Depth);
}
else
{
// set the stretch size back to stretch the child elements
context.Stretch = stretch;
// calculate availible width
context.StretchWidth = context.StretchWidth - extent.Width;
if (context.Stretch.Width < 0)
{
context.StretchWidth = 0;
}
// size to stretch each width equally
context.StretchWidth = context.Stretch.Width / (float)stretchCount;
}
// process all areas that need to be stretched
for (int i = 0; i < arguments.Count; i++)
{
MathMLOperatorElement op = arguments[i] as MathMLOperatorElement;
if (op != null && op.Stretchy)
{
//areas[i] = (Area)op.Accept(this, context);
extent.Append((BoundingBox)op.Accept(this, context));
}
}
}
return(extent);
}
private static void CreateCellSizesAndShifts(MathMLTableCellElement[][] cells,
Row[] rows, Column[] columns, ref BoundingBox[][] sizes, ref PointF[][] shifts)
{
sizes = new BoundingBox[cells.Length][];
shifts = new PointF[cells.Length][];
// init to 1 to skip over first spacing row for frame
int rowIndex = 1;
// y shift, start with upper frame space
float y = rows[0].VerticalExtent;
// outer loop - rows
for (int i = 0; i < cells.Length; i++)
{
// init to 1 to skip over first spacing column for frame
int colIndex = 1;
// start x shift with frame space
float x = columns[0].Width;
sizes[i] = new BoundingBox[cells[i].Length];
shifts[i] = new PointF[cells[i].Length];
// inner loop - columns
for (int j = 0; j < cells[i].Length; j++)
{
if (cells[i][j] != null)
{
BoundingBox box = BoundingBox.New();
for (int k = 0, k2 = 0; k < cells[i][j].ColumnSpan; k++, k2 += 2)
{
if (colIndex + k2 < columns.Length)
{
if (k2 == 0)
{
box.Width = columns[colIndex].Width;
}
else
{
// add content column
box.Append(BoundingBox.New(columns[colIndex + k].Width, 0, 0));
// add space column
box.Append(BoundingBox.New(columns[colIndex + k + 1].Width, 0, 0));
}
}
else
{
Debug.WriteLine("warning, insuffcient columns for spanning");
}
}
for (int k = 0, k2 = 0; k < cells[i][j].RowSpan; k++, k2 += 2)
{
if (rowIndex + k2 < rows.Length)
{
if (k2 == 0)
{
box.Height = rows[rowIndex].Height;
box.Depth = rows[rowIndex].Depth;
}
else
{
// add content row
box.Over(BoundingBox.New(0, rows[rowIndex + k2].Height, rows[rowIndex + k].Depth));
// add space row
box.Over(BoundingBox.New(0, rows[rowIndex + k2 + 1].Height, rows[rowIndex + k + 1].Depth));
}
}
}
Debug.Assert(box.Height == rows[rowIndex].Height);
sizes[i][j] = box;
shifts[i][j] = new PointF(x, y + box.Height);
}
// add width of current column and next column which is a spaceing column
// and set index to next non space column
x += columns[colIndex++].Width;
x += columns[colIndex++].Width;
}
// add vertical extent of current row and next row which is a spaceing row
// and set index to next non space row
y += rows[rowIndex++].VerticalExtent;
y += rows[rowIndex++].VerticalExtent;
}
}