void TextService::setCompositionString(EditSession* session, const wchar_t* str, int len) {
ITfContext* context = session->context();
if(context) {
TfEditCookie editCookie = session->editCookie();
TF_SELECTION selection;
ULONG selectionNum;
// get current selection/insertion point
if(context->GetSelection(editCookie, TF_DEFAULT_SELECTION, 1, &selection, &selectionNum) == S_OK) {
ComPtr<ITfRange> compositionRange;
if(composition_->GetRange(&compositionRange) == S_OK) {
bool selPosInComposition = true;
// if current insertion point is not covered by composition, we cannot insert text here.
if(selPosInComposition) {
// replace context of composion area with the new string.
compositionRange->SetText(editCookie, TF_ST_CORRECTION, str, len);
// move the insertion point to end of the composition string
selection.range->Collapse(editCookie, TF_ANCHOR_END);
context->SetSelection(editCookie, 1, &selection);
}
// set display attribute to the composition range
ComPtr<ITfProperty> dispAttrProp;
if(context->GetProperty(GUID_PROP_ATTRIBUTE, &dispAttrProp) == S_OK) {
VARIANT val;
val.vt = VT_I4;
val.lVal = module_->inputAttrib()->atom();
dispAttrProp->SetValue(editCookie, compositionRange, &val);
}
}
selection.range->Release();
}
}
}
