nsresult
nsQueryContentEventHandler::OnQueryCharacterRect(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIRange> range = new nsRange();
NS_ENSURE_TRUE(range, NS_ERROR_OUT_OF_MEMORY);
rv = SetRangeFromFlatTextOffset(range, aEvent->mInput.mOffset, 1, PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
if (range->Collapsed()) {
// There is no character at the offset.
return NS_OK;
}
return QueryRectFor(aEvent, range, nsnull);
}
nsresult
nsQueryContentEventHandler::OnQueryCaretRect(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsICaret> caret;
rv = mPresShell->GetCaret(getter_AddRefs(caret));
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(caret, "GetCaret succeeded, but the result is null");
// When the selection is collapsed and the queried offset is current caret
// position, we should return the "real" caret rect.
PRBool selectionIsCollapsed;
rv = mSelection->GetIsCollapsed(&selectionIsCollapsed);
NS_ENSURE_SUCCESS(rv, rv);
if (selectionIsCollapsed) {
PRUint32 offset;
rv = GetFlatTextOffsetOfRange(mFirstSelectedRange, &offset);
NS_ENSURE_SUCCESS(rv, rv);
if (offset == aEvent->mInput.mOffset) {
PRBool isCollapsed;
rv = caret->GetCaretCoordinates(nsICaret::eTopLevelWindowCoordinates,
mSelection, &aEvent->mReply.mRect,
&isCollapsed, nsnull);
NS_ENSURE_SUCCESS(rv, rv);
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
}
// Otherwise, we should set the guessed caret rect.
nsCOMPtr<nsIRange> range = new nsRange();
NS_ENSURE_TRUE(range, NS_ERROR_OUT_OF_MEMORY);
rv = SetRangeFromFlatTextOffset(range, aEvent->mInput.mOffset, 0, PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
return QueryRectFor(aEvent, range, caret);
}
nsresult
nsContentEventHandler::OnQueryTextContent(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(aEvent->mReply.mString.IsEmpty(),
"The reply string must be empty");
nsRefPtr<nsRange> range = new nsRange();
rv = SetRangeFromFlatTextOffset(range, aEvent->mInput.mOffset,
aEvent->mInput.mLength, false);
NS_ENSURE_SUCCESS(rv, rv);
rv = GenerateFlatTextContent(range, aEvent->mReply.mString);
NS_ENSURE_SUCCESS(rv, rv);
aEvent->mSucceeded = true;
return NS_OK;
}
nsresult
nsContentEventHandler::OnSelectionEvent(nsSelectionEvent* aEvent)
{
aEvent->mSucceeded = PR_FALSE;
// Get selection to manipulate
// XXX why do we need to get them from ISM? This method should work fine
// without ISM.
nsresult rv = nsIMEStateManager::
GetFocusSelectionAndRoot(getter_AddRefs(mSelection),
getter_AddRefs(mRootContent));
if (rv != NS_ERROR_NOT_AVAILABLE) {
NS_ENSURE_SUCCESS(rv, rv);
} else {
rv = Init(aEvent);
NS_ENSURE_SUCCESS(rv, rv);
}
// Get range from offset and length
nsRefPtr<nsRange> range = new nsRange();
NS_ENSURE_TRUE(range, NS_ERROR_OUT_OF_MEMORY);
rv = SetRangeFromFlatTextOffset(range, aEvent->mOffset, aEvent->mLength,
aEvent->mExpandToClusterBoundary);
NS_ENSURE_SUCCESS(rv, rv);
nsINode* startNode = range->GetStartParent();
nsINode* endNode = range->GetEndParent();
PRInt32 startOffset = range->StartOffset();
PRInt32 endOffset = range->EndOffset();
AdjustRangeForSelection(mRootContent, &startNode, &startOffset);
AdjustRangeForSelection(mRootContent, &endNode, &endOffset);
nsCOMPtr<nsIDOMNode> startDomNode(do_QueryInterface(startNode));
nsCOMPtr<nsIDOMNode> endDomNode(do_QueryInterface(endNode));
NS_ENSURE_TRUE(startDomNode && endDomNode, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsISelectionPrivate> selPrivate = do_QueryInterface(mSelection);
NS_ENSURE_TRUE(selPrivate, NS_ERROR_UNEXPECTED);
selPrivate->StartBatchChanges();
// Clear selection first before setting
rv = mSelection->RemoveAllRanges();
// Need to call EndBatchChanges at the end even if call failed
if (NS_SUCCEEDED(rv)) {
if (aEvent->mReversed) {
rv = mSelection->Collapse(endDomNode, endOffset);
} else {
rv = mSelection->Collapse(startDomNode, startOffset);
}
if (NS_SUCCEEDED(rv) &&
(startDomNode != endDomNode || startOffset != endOffset)) {
if (aEvent->mReversed) {
rv = mSelection->Extend(startDomNode, startOffset);
} else {
rv = mSelection->Extend(endDomNode, endOffset);
}
}
}
selPrivate->EndBatchChanges();
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsISelection2>(do_QueryInterface(mSelection))->ScrollIntoView(
nsISelectionController::SELECTION_FOCUS_REGION, PR_FALSE, -1, -1);
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
nsresult
nsContentEventHandler::OnQueryCaretRect(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
nsRefPtr<nsCaret> caret = mPresShell->GetCaret();
NS_ASSERTION(caret, "GetCaret returned null");
// When the selection is collapsed and the queried offset is current caret
// position, we should return the "real" caret rect.
PRBool selectionIsCollapsed;
rv = mSelection->GetIsCollapsed(&selectionIsCollapsed);
NS_ENSURE_SUCCESS(rv, rv);
if (selectionIsCollapsed) {
PRUint32 offset;
rv = GetFlatTextOffsetOfRange(mRootContent, mFirstSelectedRange, &offset);
NS_ENSURE_SUCCESS(rv, rv);
if (offset == aEvent->mInput.mOffset) {
nsRect rect;
nsIFrame* caretFrame = caret->GetGeometry(mSelection, &rect);
if (!caretFrame)
return NS_ERROR_FAILURE;
rv = ConvertToRootViewRelativeOffset(caretFrame, rect);
NS_ENSURE_SUCCESS(rv, rv);
aEvent->mReply.mRect =
rect.ToOutsidePixels(caretFrame->PresContext()->AppUnitsPerDevPixel());
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
}
// Otherwise, we should set the guessed caret rect.
nsCOMPtr<nsIRange> range = new nsRange();
NS_ENSURE_TRUE(range, NS_ERROR_OUT_OF_MEMORY);
rv = SetRangeFromFlatTextOffset(range, aEvent->mInput.mOffset, 0, PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
PRInt32 offsetInFrame;
nsIFrame* frame;
rv = GetStartFrameAndOffset(range, &frame, &offsetInFrame);
NS_ENSURE_SUCCESS(rv, rv);
nsPoint posInFrame;
rv = frame->GetPointFromOffset(range->StartOffset(), &posInFrame);
NS_ENSURE_SUCCESS(rv, rv);
nsRect rect;
rect.x = posInFrame.x;
rect.y = posInFrame.y;
rect.width = caret->GetCaretRect().width;
rect.height = frame->GetSize().height;
rv = ConvertToRootViewRelativeOffset(frame, rect);
NS_ENSURE_SUCCESS(rv, rv);
aEvent->mReply.mRect =
rect.ToOutsidePixels(mPresContext->AppUnitsPerDevPixel());
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
nsresult
nsContentEventHandler::OnQueryTextRect(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIRange> range = new nsRange();
if (!range) {
return NS_ERROR_OUT_OF_MEMORY;
}
rv = SetRangeFromFlatTextOffset(range, aEvent->mInput.mOffset,
aEvent->mInput.mLength, PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
// used to iterate over all contents and their frames
nsCOMPtr<nsIContentIterator> iter;
rv = NS_NewContentIterator(getter_AddRefs(iter));
NS_ENSURE_SUCCESS(rv, rv);
iter->Init(range);
NS_ENSURE_SUCCESS(rv, rv);
// get the starting frame
PRInt32 offset = range->StartOffset();
nsINode* node = iter->GetCurrentNode();
if (!node) {
node = AdjustTextRectNode(range->GetStartParent(), offset);
}
nsIFrame* firstFrame = nsnull;
rv = GetFrameForTextRect(node, offset, PR_TRUE, &firstFrame);
NS_ENSURE_SUCCESS(rv, rv);
// get the starting frame rect
nsRect rect(nsPoint(0, 0), firstFrame->GetRect().Size());
rv = ConvertToRootViewRelativeOffset(firstFrame, rect);
NS_ENSURE_SUCCESS(rv, rv);
nsRect frameRect = rect;
nsPoint ptOffset;
firstFrame->GetPointFromOffset(offset, &ptOffset);
// minus 1 to avoid creating an empty rect
rect.x += ptOffset.x - 1;
rect.width -= ptOffset.x - 1;
// get the ending frame
offset = range->EndOffset();
node = AdjustTextRectNode(range->GetEndParent(), offset);
nsIFrame* lastFrame = nsnull;
rv = GetFrameForTextRect(node, offset, range->Collapsed(), &lastFrame);
NS_ENSURE_SUCCESS(rv, rv);
// iterate over all covered frames
for (nsIFrame* frame = firstFrame; frame != lastFrame;) {
frame = frame->GetNextContinuation();
if (!frame) {
do {
iter->Next();
node = iter->GetCurrentNode();
if (!node || !node->IsNodeOfType(nsINode::eCONTENT))
continue;
frame = static_cast<nsIContent*>(node)->GetPrimaryFrame();
} while (!frame && !iter->IsDone());
if (!frame) {
// this can happen when the end offset of the range is 0.
frame = lastFrame;
}
}
frameRect.SetRect(nsPoint(0, 0), frame->GetRect().Size());
rv = ConvertToRootViewRelativeOffset(frame, frameRect);
NS_ENSURE_SUCCESS(rv, rv);
if (frame != lastFrame) {
// not last frame, so just add rect to previous result
rect.UnionRect(rect, frameRect);
}
}
// get the ending frame rect
lastFrame->GetPointFromOffset(offset, &ptOffset);
// minus 1 to avoid creating an empty rect
frameRect.width -= lastFrame->GetRect().width - ptOffset.x - 1;
if (firstFrame == lastFrame) {
rect.IntersectRect(rect, frameRect);
} else {
rect.UnionRect(rect, frameRect);
}
aEvent->mReply.mRect =
rect.ToOutsidePixels(mPresContext->AppUnitsPerDevPixel());
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
