public static void ClearBackgroundColor(MshtmlMarkupServices markupServices, MarkupRange selection)
{
HtmlStyleHelper htmlStyleHelper = new HtmlStyleHelper(markupServices);
htmlStyleHelper.SplitInlineTags(selection.Start);
htmlStyleHelper.SplitInlineTags(selection.End);
IHTMLElement[] elements = selection.GetElements(ElementFilters.CreateTagIdFilter("font"), false);
foreach (IHTMLElement element in elements)
{
element.style.backgroundColor = "";
}
// We may now be left with empty font tags, e.g. <font>blah</font>.
// After switching between editors this becomes <font size="+0">blah</font>, which
// causes blah to be rendered differently.
// To avoid that we need to remove any empty-attribute font tags.
selection.RemoveElementsByTagId(_ELEMENT_TAG_ID.TAGID_FONT, true);
}
public static void ChangeElementTagIds(MshtmlMarkupServices markupServices, MarkupRange selection, _ELEMENT_TAG_ID[] tagBefore, _ELEMENT_TAG_ID tagAfter)
{
HtmlStyleHelper htmlStyleHelper = new HtmlStyleHelper(markupServices);
int parentStartDiff = 0;
MarkupRange rangeToChange;
bool selectionStartedEmpty = selection.IsEmpty();
if (selectionStartedEmpty)
{
// Operate on parent block element
rangeToChange = markupServices.CreateMarkupRange(selection.ParentBlockElement());
parentStartDiff = selection.Start.MarkupPosition - rangeToChange.Start.MarkupPosition;
}
else
{
rangeToChange = selection;
// If expanding the selection would not include any new text, then expand it.
// <h1>|abc|</h1> --> |<h1>abc</h1>|
rangeToChange.MoveOutwardIfNoText();
}
IHTMLElementFilter[] filters = new IHTMLElementFilter[tagBefore.Length];
for (int i = 0; i < tagBefore.Length; i++)
{
filters[i] = ElementFilters.CreateTagIdFilter(markupServices.GetNameForTagId(tagBefore[i]));
}
IHTMLElement[] elements = rangeToChange.GetElements(ElementFilters.CreateCompoundElementFilter(filters), false);
foreach (IHTMLElement element in elements)
{
MarkupRange elementRange = markupServices.CreateMarkupRange(element);
int startPositionDiff = rangeToChange.Start.MarkupPosition - elementRange.Start.MarkupPosition;
int endPositionDiff = rangeToChange.End.MarkupPosition - elementRange.End.MarkupPosition;
// @RIBBON TODO: Appropriately preserve element attributes when changing tag ids?
MarkupRange newElementRange = markupServices.CreateMarkupRange(htmlStyleHelper.WrapRangeInSpanElement(tagAfter, null, elementRange));
markupServices.RemoveElement(element);
MarkupPointer startPointer = rangeToChange.Start.Clone();
startPointer.MoveToMarkupPosition(startPointer.Container, newElementRange.Start.MarkupPosition + startPositionDiff);
if (startPointer.IsLeftOf(rangeToChange.Start))
{
rangeToChange.Start.MoveToPointer(startPointer);
}
MarkupPointer endPointer = rangeToChange.End.Clone();
endPointer.MoveToMarkupPosition(endPointer.Container, newElementRange.End.MarkupPosition + endPositionDiff);
if (endPointer.IsLeftOf(elementRange.End))
{
rangeToChange.End.MoveToPointer(endPointer);
}
}
if (selectionStartedEmpty)
{
selection.Start.MoveToMarkupPosition(selection.Start.Container, rangeToChange.Start.MarkupPosition + parentStartDiff);
selection.Collapse(true);
}
}
