/// <summary>
/// Walk through the markup range in reverse, letting the walker visit each position.
/// </summary>
/// <param name="walker">the delegate walking navigating the the markup range</param>
/// <param name="inScopeElementsOnly">if true, enter/exit notifications about out-of-scope elements will be suppressed.</param>
/// <returns></returns>
public void WalkRangeReverse(MarkupRangeWalker walker, bool inScopeContextsOnly)
{
MarkupPointer p1 = MarkupServices.CreateMarkupPointer(End);
MarkupPointer p2 = MarkupServices.CreateMarkupPointer(End);
p1.Cling = false;
p2.Cling = false;
MarkupContext context = new MarkupContext();
bool continueWalking = true;
MarkupRange currentRange = null;
while (continueWalking && p2.IsRightOf(Start))
{
string text = null;
bool isInScope = true;
p2.Left(true, context);
currentRange = new MarkupRange(p2.Clone(), p1.Clone(), MarkupServices);
if (inScopeContextsOnly)
{
if (context.Element != null)
{
if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_EnterScope)
{
p1.MoveAdjacentToElement(context.Element, _ELEMENT_ADJACENCY.ELEM_ADJ_AfterEnd);
isInScope = InRange(p1);
}
else if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_ExitScope)
{
p1.MoveAdjacentToElement(context.Element, _ELEMENT_ADJACENCY.ELEM_ADJ_BeforeBegin);
isInScope = InRange(p1);
}
}
else if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_Text)
{
// It's possible part of the text is out of scope, so only return the in-scope text.
if (currentRange.Start.IsLeftOf(Start))
{
currentRange.Start.MoveToPointer(Start);
}
}
}
if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_Text)
{
text = currentRange.Text;
}
if (!inScopeContextsOnly || isInScope)
{
continueWalking = walker(currentRange, context, text);
}
p1.MoveToPointer(p2);
}
}
/// <summary>
/// Walk through the markup range in reverse, letting the walker visit each position.
/// </summary>
/// <param name="walker">the delegate walking navigating the the markup range</param>
/// <param name="inScopeElementsOnly">if true, enter/exit notifications about out-of-scope elements will be suppressed.</param>
/// <returns></returns>
public void WalkRangeReverse(MarkupRangeWalker walker, bool inScopeContextsOnly)
{
MarkupPointer p1 = MarkupServices.CreateMarkupPointer(End);
MarkupPointer p2 = MarkupServices.CreateMarkupPointer(End);
p1.Cling = false;
p2.Cling = false;
MarkupContext context = new MarkupContext();
bool continueWalking = true;
MarkupRange currentRange = null;
while (continueWalking && p2.IsRightOf(Start))
{
string text = null;
bool isInScope = true;
p2.Left(true, context);
currentRange = new MarkupRange(p2.Clone(), p1.Clone(), MarkupServices);
if (inScopeContextsOnly)
{
if (context.Element != null)
{
if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_EnterScope)
{
p1.MoveAdjacentToElement(context.Element, _ELEMENT_ADJACENCY.ELEM_ADJ_AfterEnd);
isInScope = InRange(p1);
}
else if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_ExitScope)
{
p1.MoveAdjacentToElement(context.Element, _ELEMENT_ADJACENCY.ELEM_ADJ_BeforeBegin);
isInScope = InRange(p1);
}
}
else if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_Text)
{
// It's possible part of the text is out of scope, so only return the in-scope text.
if (currentRange.Start.IsLeftOf(Start))
{
currentRange.Start.MoveToPointer(Start);
}
}
}
if (context.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_Text)
{
text = currentRange.Text;
}
if (!inScopeContextsOnly || isInScope)
{
continueWalking = walker(currentRange, context, text);
}
p1.MoveToPointer(p2);
}
}
/// <summary>
/// Walk through the markup range letting the walker visit each position.
/// </summary>
/// <param name="walker">the delegate walking navigating the the markup range</param>
/// <returns></returns>
public void WalkRange(MarkupRangeWalker walker)
{
WalkRange(walker, false);
}
/// <summary>
/// Walk through the markup range letting the walker visit each position.
/// </summary>
/// <param name="walker">the delegate walking navigating the the markup range</param>
/// <returns></returns>
public void WalkRange(MarkupRangeWalker walker)
{
WalkRange(walker, false);
}