EphemeralRange LocalFrame::rangeForPoint(const IntPoint& framePoint) {
const PositionWithAffinity positionWithAffinity =
positionForPoint(framePoint);
if (positionWithAffinity.isNull())
return EphemeralRange();
VisiblePosition position = createVisiblePosition(positionWithAffinity);
VisiblePosition previous = previousPositionOf(position);
if (previous.isNotNull()) {
const EphemeralRange previousCharacterRange = makeRange(previous, position);
IntRect rect = editor().firstRectForRange(previousCharacterRange);
if (rect.contains(framePoint))
return EphemeralRange(previousCharacterRange);
}
VisiblePosition next = nextPositionOf(position);
const EphemeralRange nextCharacterRange = makeRange(position, next);
if (nextCharacterRange.isNotNull()) {
IntRect rect = editor().firstRectForRange(nextCharacterRange);
if (rect.contains(framePoint))
return EphemeralRange(nextCharacterRange);
}
return EphemeralRange();
}
Dart_Handle Paragraph::getPositionForOffset(double dx, double dy) {
LayoutPoint point(dx, dy);
PositionWithAffinity position = m_renderView->positionForPoint(point);
Dart_Handle result = Dart_NewList(2);
Dart_ListSetAt(result, 0, ToDart(absoluteOffsetForPosition(position)));
Dart_ListSetAt(result, 1, ToDart(static_cast<int>(position.affinity())));
return result;
}
// FIXME: We should merge this function with
// ApplyBlockElementCommand::formatSelection
void IndentOutdentCommand::outdentRegion(
const VisiblePosition& startOfSelection,
const VisiblePosition& endOfSelection,
EditingState* editingState) {
VisiblePosition endOfCurrentParagraph = endOfParagraph(startOfSelection);
VisiblePosition endOfLastParagraph = endOfParagraph(endOfSelection);
if (endOfCurrentParagraph.deepEquivalent() ==
endOfLastParagraph.deepEquivalent()) {
outdentParagraph(editingState);
return;
}
Position originalSelectionEnd = endingSelection().end();
Position endAfterSelection =
endOfParagraph(nextPositionOf(endOfLastParagraph)).deepEquivalent();
while (endOfCurrentParagraph.deepEquivalent() != endAfterSelection) {
PositionWithAffinity endOfNextParagraph =
endOfParagraph(nextPositionOf(endOfCurrentParagraph))
.toPositionWithAffinity();
if (endOfCurrentParagraph.deepEquivalent() ==
endOfLastParagraph.deepEquivalent()) {
SelectionInDOMTree::Builder builder;
if (originalSelectionEnd.isNotNull())
builder.collapse(originalSelectionEnd);
setEndingSelection(builder.build());
} else {
setEndingSelection(SelectionInDOMTree::Builder()
.collapse(endOfCurrentParagraph.deepEquivalent())
.build());
}
outdentParagraph(editingState);
if (editingState->isAborted())
return;
// outdentParagraph could move more than one paragraph if the paragraph
// is in a list item. As a result, endAfterSelection and endOfNextParagraph
// could refer to positions no longer in the document.
if (endAfterSelection.isNotNull() && !endAfterSelection.isConnected())
break;
document().updateStyleAndLayoutIgnorePendingStylesheets();
if (endOfNextParagraph.isNotNull() && !endOfNextParagraph.isConnected()) {
endOfCurrentParagraph = createVisiblePosition(endingSelection().end());
endOfNextParagraph = endOfParagraph(nextPositionOf(endOfCurrentParagraph))
.toPositionWithAffinity();
}
endOfCurrentParagraph = createVisiblePosition(endOfNextParagraph);
}
}
PositionWithAffinity LocalFrame::positionForPoint(const IntPoint& framePoint) {
HitTestResult result = eventHandler().hitTestResultAtPoint(framePoint);
Node* node = result.innerNodeOrImageMapImage();
if (!node)
return PositionWithAffinity();
LayoutObject* layoutObject = node->layoutObject();
if (!layoutObject)
return PositionWithAffinity();
const PositionWithAffinity position =
layoutObject->positionForPoint(result.localPoint());
if (position.isNull())
return PositionWithAffinity(firstPositionInOrBeforeNode(node));
return position;
}
int Paragraph::absoluteOffsetForPosition(const PositionWithAffinity& position) {
DCHECK(position.renderer());
unsigned offset = 0;
for (RenderObject* object = m_renderView.get(); object; object = object->nextInPreOrder()) {
if (object == position.renderer())
return offset + position.offset();
if (object->isText()) {
RenderText* text = toRenderText(object);
offset += text->textLength();
}
}
DCHECK(false);
return 0;
}
PassRefPtr<Range> Document::caretRangeFromPoint(int x, int y)
{
if (!renderView())
return nullptr;
HitTestResult result = hitTestInDocument(this, x, y);
RenderObject* renderer = result.renderer();
if (!renderer)
return nullptr;
PositionWithAffinity positionWithAffinity = result.position();
if (positionWithAffinity.position().isNull())
return nullptr;
Position rangeCompliantPosition = positionWithAffinity.position().parentAnchoredEquivalent();
return Range::create(*this, rangeCompliantPosition, rangeCompliantPosition);
}
void FrameCaret::invalidateCaretRect(bool forceInvalidation) {
if (!m_caretRectDirty)
return;
m_caretRectDirty = false;
DCHECK(caretPositionIsValidForDocument(*m_frame->document()));
LayoutObject* layoutObject = nullptr;
LayoutRect newRect;
PositionWithAffinity currentCaretPosition = caretPosition();
if (isActive())
newRect = localCaretRectOfPosition(currentCaretPosition, layoutObject);
Node* newNode = layoutObject ? layoutObject->node() : nullptr;
// The current selected node |newNode| could be a child multiple levels below
// its associated "anchor node" ancestor, so we reference and keep around the
// anchor node for checking editability.
// TODO(wkorman): Consider storing previous Position, rather than Node, and
// making use of EditingUtilies::isEditablePosition() directly.
Node* newAnchorNode =
currentCaretPosition.position().parentAnchoredEquivalent().anchorNode();
if (newNode && newAnchorNode && newNode != newAnchorNode &&
newAnchorNode->layoutObject() && newAnchorNode->layoutObject()->isBox()) {
newNode->layoutObject()->mapToVisualRectInAncestorSpace(
toLayoutBoxModelObject(newAnchorNode->layoutObject()), newRect);
}
// It's possible for the timer to be inactive even though we want to
// invalidate the caret. For example, when running as a layout test the
// caret blink interval could be zero and thus |m_caretBlinkTimer| will
// never be started. We provide |forceInvalidation| for use by paint
// invalidation internals where we need to invalidate the caret regardless
// of timer state.
if (!forceInvalidation && !m_caretBlinkTimer.isActive() &&
newNode == m_previousCaretNode && newRect == m_previousCaretRect &&
m_caretVisibility == m_previousCaretVisibility)
return;
if (m_previousCaretAnchorNode &&
shouldRepaintCaret(*m_previousCaretAnchorNode)) {
invalidateLocalCaretRect(m_previousCaretAnchorNode.get(),
m_previousCaretRect);
}
if (newAnchorNode && shouldRepaintCaret(*newAnchorNode))
invalidateLocalCaretRect(newAnchorNode, newRect);
m_previousCaretNode = newNode;
m_previousCaretAnchorNode = newAnchorNode;
m_previousCaretRect = newRect;
m_previousCaretVisibility = m_caretVisibility;
}
void CaretBase::updateCaretRect(const PositionWithAffinity& caretPosition) {
m_caretLocalRect = LayoutRect();
if (caretPosition.isNull())
return;
DCHECK(caretPosition.anchorNode()->layoutObject());
// First compute a rect local to the layoutObject at the selection start.
LayoutObject* layoutObject;
m_caretLocalRect = localCaretRectOfPosition(caretPosition, layoutObject);
// Get the layoutObject that will be responsible for painting the caret
// (which is either the layoutObject we just found, or one of its containers).
LayoutBlockItem caretPainterItem =
LayoutBlockItem(caretLayoutObject(caretPosition.anchorNode()));
mapCaretRectToCaretPainter(LayoutItem(layoutObject), caretPainterItem,
m_caretLocalRect);
}
bool CaretBase::updateCaretRect(const PositionWithAffinity& caretPosition)
{
m_caretLocalRect = LayoutRect();
if (caretPosition.position().isNull())
return false;
ASSERT(caretPosition.position().anchorNode()->layoutObject());
// First compute a rect local to the layoutObject at the selection start.
LayoutObject* layoutObject;
m_caretLocalRect = localCaretRectOfPosition(caretPosition, layoutObject);
// Get the layoutObject that will be responsible for painting the caret
// (which is either the layoutObject we just found, or one of its containers).
LayoutBlock* caretPainter = caretLayoutObject(caretPosition.position().anchorNode());
mapCaretRectToCaretPainter(layoutObject, caretPainter, m_caretLocalRect);
return true;
}
PassRefPtr<Range> Document::caretRangeFromPoint(int x, int y)
{
if (!renderView())
return nullptr;
HitTestResult result = hitTestInDocument(this, x, y);
RenderObject* renderer = result.renderer();
if (!renderer)
return nullptr;
Node* node = renderer->node();
Node* shadowAncestorNode = ancestorInThisScope(node);
if (shadowAncestorNode != node) {
unsigned offset = shadowAncestorNode->nodeIndex();
ContainerNode* container = shadowAncestorNode->parentNode();
return Range::create(*this, container, offset, container, offset);
}
PositionWithAffinity positionWithAffinity = result.position();
if (positionWithAffinity.position().isNull())
return nullptr;
Position rangeCompliantPosition = positionWithAffinity.position().parentAnchoredEquivalent();
return Range::create(*this, rangeCompliantPosition, rangeCompliantPosition);
}
bool CaretBase::updateCaretRect(Document* document, const PositionWithAffinity& caretPosition)
{
m_caretLocalRect = LayoutRect();
m_caretRectNeedsUpdate = false;
if (caretPosition.position().isNull())
return false;
ASSERT(caretPosition.position().deprecatedNode()->renderer());
// First compute a rect local to the renderer at the selection start.
RenderObject* renderer;
LayoutRect localRect = localCaretRectOfPosition(caretPosition, renderer);
// Get the renderer that will be responsible for painting the caret
// (which is either the renderer we just found, or one of its containers).
RenderBlock* caretPainter = caretRenderer(caretPosition.position().deprecatedNode());
// Compute an offset between the renderer and the caretPainter.
bool unrooted = false;
while (renderer != caretPainter) {
RenderObject* containerObject = renderer->container();
if (!containerObject) {
unrooted = true;
break;
}
localRect.move(renderer->offsetFromContainer(containerObject, localRect.location()));
renderer = containerObject;
}
if (!unrooted)
m_caretLocalRect = localRect;
return true;
}
void InsertListCommand::doApply(EditingState* editingState) {
// Only entry points are Editor::Command::execute and
// IndentOutdentCommand::outdentParagraph, both of which ensure clean layout.
DCHECK(!document().needsLayoutTreeUpdate());
if (!endingSelection().isNonOrphanedCaretOrRange())
return;
if (!endingSelection().rootEditableElement())
return;
VisiblePosition visibleEnd = endingSelection().visibleEnd();
VisiblePosition visibleStart = endingSelection().visibleStart();
// When a selection ends at the start of a paragraph, we rarely paint
// the selection gap before that paragraph, because there often is no gap.
// In a case like this, it's not obvious to the user that the selection
// ends "inside" that paragraph, so it would be confusing if
// InsertUn{Ordered}List operated on that paragraph.
// FIXME: We paint the gap before some paragraphs that are indented with left
// margin/padding, but not others. We should make the gap painting more
// consistent and then use a left margin/padding rule here.
if (visibleEnd.deepEquivalent() != visibleStart.deepEquivalent() &&
isStartOfParagraph(visibleEnd, CanSkipOverEditingBoundary)) {
setEndingSelection(createVisibleSelection(
visibleStart,
previousPositionOf(visibleEnd, CannotCrossEditingBoundary),
endingSelection().isDirectional()));
if (!endingSelection().rootEditableElement())
return;
}
const HTMLQualifiedName& listTag = (m_type == OrderedList) ? olTag : ulTag;
if (endingSelection().isRange()) {
bool forceListCreation = false;
VisibleSelection selection =
selectionForParagraphIteration(endingSelection());
DCHECK(selection.isRange());
VisiblePosition visibleStartOfSelection = selection.visibleStart();
VisiblePosition visibleEndOfSelection = selection.visibleEnd();
PositionWithAffinity startOfSelection =
visibleStartOfSelection.toPositionWithAffinity();
PositionWithAffinity endOfSelection =
visibleEndOfSelection.toPositionWithAffinity();
Position startOfLastParagraph =
startOfParagraph(visibleEndOfSelection, CanSkipOverEditingBoundary)
.deepEquivalent();
Range* currentSelection = firstRangeOf(endingSelection());
ContainerNode* scopeForStartOfSelection = nullptr;
ContainerNode* scopeForEndOfSelection = nullptr;
// FIXME: This is an inefficient way to keep selection alive because
// indexForVisiblePosition walks from the beginning of the document to the
// visibleEndOfSelection everytime this code is executed. But not using
// index is hard because there are so many ways we can lose selection inside
// doApplyForSingleParagraph.
int indexForStartOfSelection = indexForVisiblePosition(
visibleStartOfSelection, scopeForStartOfSelection);
int indexForEndOfSelection =
indexForVisiblePosition(visibleEndOfSelection, scopeForEndOfSelection);
if (startOfParagraph(visibleStartOfSelection, CanSkipOverEditingBoundary)
.deepEquivalent() != startOfLastParagraph) {
forceListCreation = !selectionHasListOfType(selection, listTag);
VisiblePosition startOfCurrentParagraph = visibleStartOfSelection;
while (inSameTreeAndOrdered(startOfCurrentParagraph.deepEquivalent(),
startOfLastParagraph) &&
!inSameParagraph(startOfCurrentParagraph,
createVisiblePosition(startOfLastParagraph),
CanCrossEditingBoundary)) {
// doApply() may operate on and remove the last paragraph of the
// selection from the document if it's in the same list item as
// startOfCurrentParagraph. Return early to avoid an infinite loop and
// because there is no more work to be done.
// FIXME(<rdar://problem/5983974>): The endingSelection() may be
// incorrect here. Compute the new location of visibleEndOfSelection
// and use it as the end of the new selection.
if (!startOfLastParagraph.isConnected())
return;
setEndingSelection(startOfCurrentParagraph);
// Save and restore visibleEndOfSelection and startOfLastParagraph when
// necessary since moveParagraph and movePragraphWithClones can remove
// nodes.
bool singleParagraphResult = doApplyForSingleParagraph(
forceListCreation, listTag, *currentSelection, editingState);
if (editingState->isAborted())
return;
if (!singleParagraphResult)
break;
document().updateStyleAndLayoutIgnorePendingStylesheets();
// Make |visibleEndOfSelection| valid again.
if (!endOfSelection.isConnected() ||
!startOfLastParagraph.isConnected()) {
visibleEndOfSelection = visiblePositionForIndex(
indexForEndOfSelection, scopeForEndOfSelection);
endOfSelection = visibleEndOfSelection.toPositionWithAffinity();
// If visibleEndOfSelection is null, then some contents have been
// deleted from the document. This should never happen and if it did,
// exit early immediately because we've lost the loop invariant.
DCHECK(visibleEndOfSelection.isNotNull());
if (visibleEndOfSelection.isNull() ||
!rootEditableElementOf(visibleEndOfSelection))
return;
startOfLastParagraph = startOfParagraph(visibleEndOfSelection,
CanSkipOverEditingBoundary)
.deepEquivalent();
} else {
visibleEndOfSelection = createVisiblePosition(endOfSelection);
}
startOfCurrentParagraph =
startOfNextParagraph(endingSelection().visibleStart());
}
setEndingSelection(visibleEndOfSelection);
}
doApplyForSingleParagraph(forceListCreation, listTag, *currentSelection,
editingState);
if (editingState->isAborted())
return;
document().updateStyleAndLayoutIgnorePendingStylesheets();
// Fetch the end of the selection, for the reason mentioned above.
if (!endOfSelection.isConnected()) {
visibleEndOfSelection = visiblePositionForIndex(indexForEndOfSelection,
scopeForEndOfSelection);
if (visibleEndOfSelection.isNull())
return;
} else {
visibleEndOfSelection = createVisiblePosition(endOfSelection);
}
if (!startOfSelection.isConnected()) {
visibleStartOfSelection = visiblePositionForIndex(
indexForStartOfSelection, scopeForStartOfSelection);
if (visibleStartOfSelection.isNull())
return;
} else {
visibleStartOfSelection = createVisiblePosition(startOfSelection);
}
setEndingSelection(
createVisibleSelection(visibleStartOfSelection, visibleEndOfSelection,
endingSelection().isDirectional()));
return;
}
DCHECK(firstRangeOf(endingSelection()));
doApplyForSingleParagraph(false, listTag, *firstRangeOf(endingSelection()),
editingState);
}
VisiblePosition::VisiblePosition(const PositionWithAffinity& positionWithAffinity)
{
init(positionWithAffinity.position(), positionWithAffinity.affinity());
}