public bool IsInputable(int position)
{
if (position == 0 || position == ProfileText.Length)
{
return(true);
}
var pos = ProfileTextPostionList.FindAtPosition(position);
if (pos.Position.Offset == position)
{
return(true);
}
if (pos.Position.Offset + pos.Position.Length == position)
{
return(true);
}
if (pos.Fragment.FragmentType == FragmentType.Text)
{
return(true);
}
return(false);
}
public void GetFragmentsAt(out Fragment before, out Fragment after, int position)
{
var pos = ProfileTextPostionList.FindAtPosition(position);
if (pos == null)
{
before = Profile;
after = null;
return;
}
if (pos.Position.Offset + pos.Position.Length == position)
{
before = pos.Fragment;
after = null;
return;
}
if (pos.Position.Offset != position && pos.Position.Offset + pos.Position.Length != position)
{
before = pos.Fragment;
after = pos.Fragment;
return;
}
after = pos.Fragment;
var fragments = ((FragmentBody)after.Parent).FragmentList;
var i = fragments.IndexOf(after);
if (i == 0 && after.ParentFragment.FragmentType == FragmentType.TextBlock)
{
fragments = ((FragmentBody)after.ParentFragment.Parent).FragmentList;
i = fragments.IndexOf(after.ParentFragment);
}
before = i == 0 ? null : fragments[i - 1];
}
public FragmentSelection GetSelection(int start, int end)
{
Contract.Requires(IsSelectable(start, end, false));
var fragmentSelection = new FragmentSelection(start, end);
Fragment beforeStart, afterStart, beforeEnd, afterEnd;
GetFragmentsAt(out beforeStart, out afterStart, start);
GetFragmentsAt(out beforeEnd, out afterEnd, end);
if (beforeStart != afterStart && beforeEnd != afterEnd)
{
if (afterStart == beforeEnd)
{
fragmentSelection.Fragments.Add(afterStart);
}
else if (afterStart.ParentFragment == beforeEnd.ParentFragment)
{
var fragments = ((FragmentBody)afterStart.Parent).FragmentList;
CopySelectionFragments(fragments, fragmentSelection.Fragments, fragments.IndexOf(afterStart),
fragments.IndexOf(beforeEnd));
}
else
{
var prefixText = afterStart.ParentFragment is TextBlock;
var suffixText = beforeEnd.ParentFragment is TextBlock;
var fragments = prefixText
? ((FragmentBody)afterStart.ParentFragment.Parent).FragmentList
: ((FragmentBody)afterStart.Parent).FragmentList;
int i;
if (prefixText)
{
i = fragments.IndexOf(afterStart.ParentFragment) + 1;
var textFragments = ((FragmentBody)afterStart.Parent).FragmentList;
CopySelectionFragments(textFragments, fragmentSelection.Fragments,
textFragments.IndexOf(afterStart), textFragments.Count - 1);
}
else
{
i = fragments.IndexOf(afterStart);
}
var j = suffixText ? fragments.IndexOf(beforeEnd.ParentFragment) - 1 : fragments.IndexOf(beforeEnd);
CopySelectionFragments(fragments, fragmentSelection.Fragments, i, j);
if (suffixText)
{
var textFragments = ((FragmentBody)beforeEnd.Parent).FragmentList;
CopySelectionFragments(textFragments, fragmentSelection.Fragments, 0,
textFragments.IndexOf(beforeEnd));
}
}
}
else if (beforeStart == afterStart && beforeEnd != afterEnd)
{
Contract.Assert(beforeStart is Text);
var pos = ProfileTextPostionList.GetFragmentPosition(afterStart);
fragmentSelection.SetPrefix((Text)afterStart, start - pos.Position.Offset);
if (afterStart != beforeEnd)
{
var fragments = ((FragmentBody)afterStart.Parent).FragmentList;
var n = fragments.Count;
var i = fragments.IndexOf(afterStart);
CopySelectionFragments(fragments, fragmentSelection.Fragments, i + 1, n - 1);
fragmentSelection.Fragments.Add(beforeEnd);
}
}
else if (beforeStart != afterStart && beforeEnd == afterEnd)
{
Contract.Assert(afterEnd is Text);
var pos = ProfileTextPostionList.GetFragmentPosition(beforeEnd);
fragmentSelection.SetSuffix((Text)beforeEnd, end - pos.Position.Offset);
if (beforeEnd != afterStart)
{
fragmentSelection.Fragments.Add(afterStart);
}
}
else if (beforeStart == afterStart && beforeEnd == afterEnd)
{
Contract.Assert(afterEnd is Text);
var pos = ProfileTextPostionList.GetFragmentPosition(beforeEnd);
fragmentSelection.SetInfix((Text)beforeEnd, start - pos.Position.Offset, end - pos.Position.Offset);
}
fragmentSelection.ProfileText = ProfileText.Substring(start, end - start);
return(fragmentSelection);
}
