nsresult
nsQueryContentEventHandler::OnQuerySelectedText(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(aEvent->mReply.mString.IsEmpty(),
"The reply string must be empty");
rv = GetFlatTextOffsetOfRange(mFirstSelectedRange, &aEvent->mReply.mOffset);
NS_ENSURE_SUCCESS(rv, rv);
PRBool isCollapsed;
rv = mSelection->GetIsCollapsed(&isCollapsed);
NS_ENSURE_SUCCESS(rv, rv);
if (!isCollapsed) {
nsCOMPtr<nsIDOMRange> domRange;
rv = mSelection->GetRangeAt(0, getter_AddRefs(domRange));
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(domRange, "GetRangeAt succeeded, but the result is null");
nsCOMPtr<nsIRange> range(do_QueryInterface(domRange));
NS_ENSURE_TRUE(range, NS_ERROR_FAILURE);
rv = GenerateFlatTextContent(range, aEvent->mReply.mString);
NS_ENSURE_SUCCESS(rv, rv);
}
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
nsresult
nsContentEventHandler::GetFlatTextOffsetOfRange(nsIContent* aRootContent,
nsIRange* aRange,
PRUint32* aNativeOffset)
{
nsINode* startNode = aRange->GetStartParent();
NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE);
PRInt32 startOffset = aRange->StartOffset();
return GetFlatTextOffsetOfRange(aRootContent, startNode, startOffset,
aNativeOffset);
}
nsresult
nsContentEventHandler::OnQuerySelectedText(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(aEvent->mReply.mString.IsEmpty(),
"The reply string must be empty");
rv = GetFlatTextOffsetOfRange(mRootContent,
mFirstSelectedRange, &aEvent->mReply.mOffset);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> anchorDomNode, focusDomNode;
rv = mSelection->GetAnchorNode(getter_AddRefs(anchorDomNode));
NS_ENSURE_TRUE(anchorDomNode, NS_ERROR_FAILURE);
rv = mSelection->GetFocusNode(getter_AddRefs(focusDomNode));
NS_ENSURE_TRUE(focusDomNode, NS_ERROR_FAILURE);
PRInt32 anchorOffset, focusOffset;
rv = mSelection->GetAnchorOffset(&anchorOffset);
NS_ENSURE_SUCCESS(rv, rv);
rv = mSelection->GetFocusOffset(&focusOffset);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsINode> anchorNode(do_QueryInterface(anchorDomNode));
nsCOMPtr<nsINode> focusNode(do_QueryInterface(focusDomNode));
NS_ENSURE_TRUE(anchorNode && focusNode, NS_ERROR_UNEXPECTED);
PRInt16 compare = nsContentUtils::ComparePoints(anchorNode, anchorOffset,
focusNode, focusOffset);
aEvent->mReply.mReversed = compare > 0;
if (compare) {
nsCOMPtr<nsIRange> range = mFirstSelectedRange;
rv = GenerateFlatTextContent(range, aEvent->mReply.mString);
NS_ENSURE_SUCCESS(rv, rv);
}
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
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::OnQueryCharacterAtPoint(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
nsIFrame* rootFrame = mPresShell->GetRootFrame();
NS_ENSURE_TRUE(rootFrame, NS_ERROR_FAILURE);
nsIWidget* rootWidget = rootFrame->GetNearestWidget();
NS_ENSURE_TRUE(rootWidget, NS_ERROR_FAILURE);
// The root frame's widget might be different, e.g., the event was fired on
// a popup but the rootFrame is the document root.
if (rootWidget != aEvent->widget) {
NS_PRECONDITION(aEvent->widget, "The event must have the widget");
nsIView* view = nsIView::GetViewFor(aEvent->widget);
NS_ENSURE_TRUE(view, NS_ERROR_FAILURE);
rootFrame = nsLayoutUtils::GetFrameFor(view);
NS_ENSURE_TRUE(rootFrame, NS_ERROR_FAILURE);
rootWidget = rootFrame->GetNearestWidget();
NS_ENSURE_TRUE(rootWidget, NS_ERROR_FAILURE);
}
nsQueryContentEvent eventOnRoot(PR_TRUE, NS_QUERY_CHARACTER_AT_POINT,
rootWidget);
eventOnRoot.refPoint = aEvent->refPoint;
if (rootWidget != aEvent->widget) {
eventOnRoot.refPoint += aEvent->widget->WidgetToScreenOffset();
eventOnRoot.refPoint -= rootWidget->WidgetToScreenOffset();
}
nsPoint ptInRoot =
nsLayoutUtils::GetEventCoordinatesRelativeTo(&eventOnRoot, rootFrame);
nsIFrame* targetFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, ptInRoot);
if (!targetFrame || targetFrame->GetType() != nsGkAtoms::textFrame ||
!targetFrame->GetContent() ||
!nsContentUtils::ContentIsDescendantOf(targetFrame->GetContent(),
mRootContent)) {
// there is no character at the point.
aEvent->mReply.mOffset = nsQueryContentEvent::NOT_FOUND;
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
nsPoint ptInTarget = ptInRoot + rootFrame->GetOffsetToCrossDoc(targetFrame);
PRInt32 rootAPD = rootFrame->PresContext()->AppUnitsPerDevPixel();
PRInt32 targetAPD = targetFrame->PresContext()->AppUnitsPerDevPixel();
ptInTarget = ptInTarget.ConvertAppUnits(rootAPD, targetAPD);
nsTextFrame* textframe = static_cast<nsTextFrame*>(targetFrame);
nsIFrame::ContentOffsets offsets =
textframe->GetCharacterOffsetAtFramePoint(ptInTarget);
NS_ENSURE_TRUE(offsets.content, NS_ERROR_FAILURE);
PRUint32 nativeOffset;
rv = GetFlatTextOffsetOfRange(mRootContent, offsets.content, offsets.offset,
&nativeOffset);
NS_ENSURE_SUCCESS(rv, rv);
nsQueryContentEvent textRect(PR_TRUE, NS_QUERY_TEXT_RECT, aEvent->widget);
textRect.InitForQueryTextRect(nativeOffset, 1);
rv = OnQueryTextRect(&textRect);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(textRect.mSucceeded, NS_ERROR_FAILURE);
// currently, we don't need to get the actual text.
aEvent->mReply.mOffset = nativeOffset;
aEvent->mReply.mRect = textRect.mReply.mRect;
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;
}