private RowOrColumnInfo AllocateVisibleSourceToVisibleTargets(RowOrColumnInfo source, RowOrColumnInfo target)
{
RowOrColumnInfo currentTarget = target;
RowOrColumnInfo lastTarget = currentTarget;
if (currentTarget.HeightOrWidth.HasValue)
{
if (source.HeightOrWidth.HasValue)
{
// The amount the source width is over the target width
double remainingSourceHeightOrWidth = source.HeightOrWidth.Value - lastTarget.HeightOrWidth.Value;
if (remainingSourceHeightOrWidth < 0)
{
// Target column is wider than the source
// Create a new row/column for the remaining source width/height, assign target info to this column.
RowOrColumnInfo insertedTarget = RowOrColumnInfo.Create(this.isRowModel);
insertedTarget.HeightOrWidth = -remainingSourceHeightOrWidth;
insertedTarget.AddMaps(lastTarget);
// Truncate the target to the height/width of the source
lastTarget.HeightOrWidth = source.HeightOrWidth;
// Assign source info to truncated target.
lastTarget.MoveMaps(source);
// Link new row/column into chain after original target
insertedTarget.Next = lastTarget.Next;
lastTarget.Next = insertedTarget;
// Update the last row/column if the inserted row/column is now the last.
if (lastTarget == this.last)
{
this.last = insertedTarget;
}
}
else
{
// Source is the same size, or wider, that the target.
if (source.Hidden)
{
lastTarget = AllocateHiddenSourceToTargets(source, lastTarget, remainingSourceHeightOrWidth);
}
else
{
lastTarget = AllocateVisibleSourceToTargets(source, lastTarget, remainingSourceHeightOrWidth);
}
}
}
else
{
// Target row/column has height/width, but source does not, assign source info to target.
currentTarget.MoveMaps(source);
}
}
else
{
// Target row/column has no specified height/width, assign source info to target and set height/width of target to source.
currentTarget.HeightOrWidth = source.HeightOrWidth;
currentTarget.MoveMaps(source);
}
return(lastTarget);
}
private RowOrColumnInfo AllocateHiddenSourceToTargets(RowOrColumnInfo source, RowOrColumnInfo target, double?remainingSourceHeightOrWidth)
{
// First, assign source info to target.
target.AddMaps(source);
// Next allocate source to next targets, until all has been allocated
while (remainingSourceHeightOrWidth == null || remainingSourceHeightOrWidth.Value > 0)
{
// While the target is smaller than the source, allocate new columns
// for the target to accept the source column information.
RowOrColumnInfo nextTarget = target.Next;
if (nextTarget == null)
{
// No 'Next' target.
// Create and link target row/column for the remaining height/width, assign source to new target.
nextTarget = RowOrColumnInfo.Create(this.isRowModel);
nextTarget.HeightOrWidth = remainingSourceHeightOrWidth;
nextTarget.Hidden = source.Hidden;
nextTarget.MoveMaps(source);
target.Next = nextTarget;
// Update the last row/column if the inserted row/column is now the last.
if (target == this.last)
{
this.last = nextTarget;
}
// Set remains to 0 so no more allocating.
target = nextTarget;
remainingSourceHeightOrWidth = 0;
}
else
{
if (!nextTarget.Hidden)
{
// Create and link in a new target for the remaining source.
RowOrColumnInfo insertedTarget = RowOrColumnInfo.Create(this.isRowModel);
insertedTarget.HeightOrWidth = remainingSourceHeightOrWidth;
insertedTarget.Hidden = true;
insertedTarget.MoveMaps(source);
// Link in the newly inserted column before the next
insertedTarget.Next = nextTarget;
target.Next = insertedTarget;
// Set remains to 0 so no more allocating.
target = insertedTarget;
remainingSourceHeightOrWidth = 0;
}
else
{
// We have a 'Next' target column which is hidden
if (nextTarget.HeightOrWidth.HasValue)
{
// It has a fixed height/width
double nextTargetHeightOrWidth = nextTarget.HeightOrWidth.Value;
if (nextTargetHeightOrWidth == remainingSourceHeightOrWidth)
{
// Next target row/column can be fully allocated to the source
nextTarget.MoveMaps(source);
target = nextTarget;
// Set remains to 0 so no more allocating.
remainingSourceHeightOrWidth = 0;
}
else if (nextTargetHeightOrWidth > remainingSourceHeightOrWidth)
{
// Next target row/column is higher/wider than required remaining.
// Create a new target for the remaining height/width + insert before the target
RowOrColumnInfo insertedTarget = RowOrColumnInfo.Create(this.isRowModel);
insertedTarget.HeightOrWidth = remainingSourceHeightOrWidth;
insertedTarget.Hidden = nextTarget.Hidden;
// Assign target + source info to inserted.
insertedTarget.MoveMaps(source);
insertedTarget.AddMaps(nextTarget);
// Truncate the original target and update with source info.
nextTarget.HeightOrWidth = nextTargetHeightOrWidth - remainingSourceHeightOrWidth;
// Link in the newly inserted row/column before the next
insertedTarget.Next = nextTarget;
target.Next = insertedTarget;
// Set remains to 0 so no more allocating.
target = insertedTarget;
remainingSourceHeightOrWidth = 0;
}
else
{
// Next target is smaller than required remaining, assign source info to target,
nextTarget.AddMaps(source);
target = nextTarget;
// Move on to next, reducing remaining.
remainingSourceHeightOrWidth = remainingSourceHeightOrWidth - nextTargetHeightOrWidth;
}
}
else
{
// Next target has no specified height/width, assign source info to target, and set height/width of source.
nextTarget.HeightOrWidth = remainingSourceHeightOrWidth;
nextTarget.MoveMaps(source);
// Set remains to 0 so no more allocating.
remainingSourceHeightOrWidth = 0;
}
}
}
}
return(target);
}
/// <summary>
/// Allocates target <see cref="RowOrColumnInfo"/> to the source <see cref="RowOrColumnInfo"/> until the source row or column is covered.
/// </summary>
/// <param name="lastAllocatedTarget">The target row or column where the source row or column is to be allocated</param>
/// <param name="source">The source row or column to be allocated</param>
/// <returns>The last target that was allocated (target may have been split to accomodate the source)</returns>
private RowOrColumnInfo AllocateTargetToSource(RowOrColumnInfo lastAllocatedTarget, RowOrColumnInfo source)
{
// Determine the next target column to be allocated to the supplied source
RowOrColumnInfo lastTarget = lastAllocatedTarget == null ? this.first : lastAllocatedTarget.Next;;
bool allocateToTargetWidth = lastTarget.HeightOrWidth.HasValue && !source.HeightOrWidth.HasValue;
bool allocateToSourceWidth = source.HeightOrWidth.HasValue && !lastTarget.HeightOrWidth.HasValue;
double?remainingSourceWidth = source.HeightOrWidth - lastTarget.HeightOrWidth;
// Next allocate source to next targets, until all has been allocated
if (allocateToTargetWidth)
{
// Target column has width, but source does not, assign source column info to target.
lastTarget.MoveMaps(source);
}
else if (allocateToSourceWidth)
{
// Target column has no specified width, but the source does, assign source column info to target and set width of target to source.
lastTarget.HeightOrWidth = source.HeightOrWidth;
lastTarget.MoveMaps(source);
}
else if (remainingSourceWidth.HasValue)
{
if (remainingSourceWidth.Value == 0)
{
// Source and target column widths are the same, assign source to target
lastTarget.MoveMaps(source);
}
else if (remainingSourceWidth.Value < 0)
{
// Target column is wider than the source (both have values)
// Create a new column for the remaining source width, assign target column info to this column.
RowOrColumnInfo insertedTargetColumnInfo = RowOrColumnInfo.Create(this.isRowModel);
insertedTargetColumnInfo.HeightOrWidth = -remainingSourceWidth;
insertedTargetColumnInfo.Hidden = source.Hidden;
insertedTargetColumnInfo.AddMaps(lastTarget);
// Truncate the target to the width of the source
lastTarget.HeightOrWidth = source.HeightOrWidth;
// Assign source column info to target.
lastTarget.MoveMaps(source);
// Link new column into chain after original target
insertedTargetColumnInfo.Next = lastTarget.Next;
lastTarget.Next = insertedTargetColumnInfo;
// Update the last column if the inserted column is now the last column.
if (lastTarget == this.last)
{
this.last = insertedTargetColumnInfo;
}
}
else
{
// Source column is wider than the target (both have values)
lastTarget = AllocateVisibleSourceToVisibleTargets(source, lastTarget);
}
}
else
{
lastTarget.MoveMaps(source);
}
// Return the last target column that was allocated
return(lastTarget);
}