private MarkupRange ApplyInlineTag(_ELEMENT_TAG_ID tagId, string attributes, MarkupRange selection)
{
MarkupRange newSelection = _markupServices.CreateMarkupRange();
// If the selection is empty, then just insert the tag
if (selection.IsEmpty())
{
newSelection.MoveToElement(WrapRangeInSpanElement(tagId, attributes, selection), false);
return(newSelection);
}
// Start at the beginning of the selection move forward until you hit a block start/exit context or the end of the selection
bool keepApplying = true;
MarkupContext contextStart = new MarkupContext();
MarkupRange blockFreeRange = _markupServices.CreateMarkupRange(selection.Start.Clone(), selection.Start.Clone());
MarkupPointer currentPointer = _markupServices.CreateMarkupPointer(blockFreeRange.Start);
while (keepApplying)
{
// Check if moving right would be beyond the bounds of the selection.
if (currentPointer.IsRightOfOrEqualTo(selection.End))
{
// We've hit the end of the selection, so we're done.
keepApplying = false;
Debug.Assert(blockFreeRange.Start.IsLeftOfOrEqualTo(selection.End));
blockFreeRange.End.MoveToPointer(selection.End.IsLeftOf(currentPointer) ? selection.End : currentPointer);
if (ShouldApplyInlineTagToBlockFreeSelection(blockFreeRange))
{
newSelection.ExpandToInclude(ApplyInlineTagToBlockFreeSelection(tagId, attributes, blockFreeRange));
}
break;
}
// Check if the next context is entering or exiting a block.
currentPointer.Right(false, contextStart);
if (contextStart.Element != null && ElementFilters.IsBlockElement(contextStart.Element))
{
switch (contextStart.Context)
{
case _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_EnterScope:
case _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_ExitScope:
{
blockFreeRange.End.MoveToPointer(selection.End.IsLeftOf(currentPointer) ? selection.End : currentPointer);
if (ShouldApplyInlineTagToBlockFreeSelection(blockFreeRange))
{
newSelection.ExpandToInclude(ApplyInlineTagToBlockFreeSelection(tagId, attributes, blockFreeRange));
}
if (contextStart.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_EnterScope)
{
blockFreeRange.Start.MoveAdjacentToElement(contextStart.Element, _ELEMENT_ADJACENCY.ELEM_ADJ_AfterBegin);
}
else if (contextStart.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_ExitScope)
{
blockFreeRange.Start.MoveAdjacentToElement(contextStart.Element, _ELEMENT_ADJACENCY.ELEM_ADJ_AfterEnd);
}
blockFreeRange.Collapse(true);
}
break;
case _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_None:
{
keepApplying = false;
blockFreeRange.End.MoveToPointer(selection.End.IsLeftOf(currentPointer) ? selection.End : currentPointer);
if (ShouldApplyInlineTagToBlockFreeSelection(blockFreeRange))
{
newSelection.ExpandToInclude(ApplyInlineTagToBlockFreeSelection(tagId, attributes, blockFreeRange));
}
}
break;
default:
break;
}
}
// Finally, move our pointer
currentPointer.Right(true);
}
if (newSelection.Positioned)
{
newSelection.Trim();
}
return(newSelection);
}