C++ (Cpp) ShadowRoot::InsertSheet示例

void
nsStyleLinkElement::UpdateStyleSheetScopedness(bool aIsNowScoped)
{
  if (!mStyleSheet) {
    return;
  }

  if (mStyleSheet->IsServo()) {
    // XXXheycam ServoStyleSheets don't support <style scoped>.
    NS_ERROR("stylo: ServoStyleSheets don't support <style scoped>");
    return;
  }

  CSSStyleSheet* sheet = mStyleSheet->AsGecko();

  nsCOMPtr<nsIContent> thisContent;
  CallQueryInterface(this, getter_AddRefs(thisContent));

  Element* oldScopeElement = sheet->GetScopeElement();
  Element* newScopeElement = aIsNowScoped ?
                               thisContent->GetParentElement() :
                               nullptr;

  if (oldScopeElement == newScopeElement) {
    return;
  }

  nsIDocument* document = thisContent->GetOwnerDocument();

  if (thisContent->IsInShadowTree()) {
    ShadowRoot* containingShadow = thisContent->GetContainingShadow();
    containingShadow->RemoveSheet(mStyleSheet);

    sheet->SetScopeElement(newScopeElement);

    containingShadow->InsertSheet(mStyleSheet, thisContent);
  } else {
    document->BeginUpdate(UPDATE_STYLE);
    document->RemoveStyleSheet(mStyleSheet);

    sheet->SetScopeElement(newScopeElement);

    document->AddStyleSheet(mStyleSheet);
    document->EndUpdate(UPDATE_STYLE);
  }

  if (oldScopeElement) {
    UpdateIsElementInStyleScopeFlagOnSubtree(oldScopeElement);
  }
  if (newScopeElement) {
    newScopeElement->SetIsElementInStyleScopeFlagOnSubtree(true);
  }
}

示例#2

显示文件

文件： nsStyleLinkElement.cpp 项目： ConradIrwin/gecko-dev

void
nsStyleLinkElement::UpdateStyleSheetScopedness(bool aIsNowScoped)
{
  if (!mStyleSheet) {
    return;
  }

  nsCOMPtr<nsIContent> thisContent;
  CallQueryInterface(this, getter_AddRefs(thisContent));

  Element* oldScopeElement = mStyleSheet->GetScopeElement();
  Element* newScopeElement = aIsNowScoped ?
                               thisContent->GetParentElement() :
                               nullptr;

  if (oldScopeElement == newScopeElement) {
    return;
  }

  nsIDocument* document = thisContent->GetOwnerDocument();

  if (thisContent->HasFlag(NODE_IS_IN_SHADOW_TREE)) {
    ShadowRoot* containingShadow = thisContent->GetContainingShadow();
    containingShadow->RemoveSheet(mStyleSheet);

    mStyleSheet->SetScopeElement(newScopeElement);

    containingShadow->InsertSheet(mStyleSheet, thisContent);
  } else {
    document->BeginUpdate(UPDATE_STYLE);
    document->RemoveStyleSheet(mStyleSheet);

    mStyleSheet->SetScopeElement(newScopeElement);

    document->AddStyleSheet(mStyleSheet);
    document->EndUpdate(UPDATE_STYLE);
  }

  if (oldScopeElement) {
    UpdateIsElementInStyleScopeFlagOnSubtree(oldScopeElement);
  }
  if (newScopeElement) {
    SetIsElementInStyleScopeFlagOnSubtree(newScopeElement);
  }
}