void
IMEContentObserver::CharacterDataWillChange(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
NS_ASSERTION(aContent->IsNodeOfType(nsINode::eTEXT),
"character data changed for non-text node");
MOZ_ASSERT(mPreCharacterDataChangeLength < 0,
"CharacterDataChanged() should've reset "
"mPreCharacterDataChangeLength");
mEndOfAddedTextCache.Clear();
mStartOfRemovingTextRangeCache.Clear();
bool causedByComposition = IsEditorHandlingEventForComposition();
if (!mTextChangeData.IsValid() && causedByComposition &&
!mUpdatePreference.WantChangesCausedByComposition()) {
return;
}
mPreCharacterDataChangeLength =
ContentEventHandler::GetNativeTextLength(aContent, aInfo->mChangeStart,
aInfo->mChangeEnd);
MOZ_ASSERT(mPreCharacterDataChangeLength >=
aInfo->mChangeEnd - aInfo->mChangeStart,
"The computed length must be same as or larger than XP length");
}
void
IMEContentObserver::ContentRemoved(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
int32_t aIndexInContainer,
nsIContent* aPreviousSibling)
{
mEndOfAddedTextCache.Clear();
bool causedByComposition = IsEditorHandlingEventForComposition();
if (!mTextChangeData.IsValid() && causedByComposition &&
!mUpdatePreference.WantChangesCausedByComposition()) {
return;
}
nsINode* containerNode = NODE_FROM(aContainer, aDocument);
uint32_t offset = 0;
nsresult rv = NS_OK;
if (!mStartOfRemovingTextRangeCache.Match(containerNode, aIndexInContainer)) {
rv =
ContentEventHandler::GetFlatTextOffsetOfRange(mRootContent, containerNode,
aIndexInContainer, &offset,
LINE_BREAK_TYPE_NATIVE);
if (NS_WARN_IF(NS_FAILED(rv))) {
mStartOfRemovingTextRangeCache.Clear();
return;
}
mStartOfRemovingTextRangeCache.Cache(containerNode, aIndexInContainer,
offset);
} else {
offset = mStartOfRemovingTextRangeCache.mFlatTextLength;
}
// get offset at the end of the deleted node
int32_t nodeLength =
aChild->IsNodeOfType(nsINode::eTEXT) ?
static_cast<int32_t>(aChild->TextLength()) :
std::max(static_cast<int32_t>(aChild->GetChildCount()), 1);
MOZ_ASSERT(nodeLength >= 0, "The node length is out of range");
uint32_t textLength = 0;
rv = ContentEventHandler::GetFlatTextOffsetOfRange(aChild, aChild,
nodeLength, &textLength,
LINE_BREAK_TYPE_NATIVE);
if (NS_WARN_IF(NS_FAILED(rv))) {
mStartOfRemovingTextRangeCache.Clear();
return;
}
if (!textLength) {
return;
}
TextChangeData data(offset, offset + textLength, offset, causedByComposition);
MaybeNotifyIMEOfTextChange(data);
}
void
IMEContentObserver::NotifyContentAdded(nsINode* aContainer,
int32_t aStartIndex,
int32_t aEndIndex)
{
mStartOfRemovingTextRangeCache.Clear();
bool causedByComposition = IsEditorHandlingEventForComposition();
if (!mTextChangeData.IsValid() && causedByComposition &&
!mUpdatePreference.WantChangesCausedByComposition()) {
return;
}
uint32_t offset = 0;
nsresult rv = NS_OK;
if (!mEndOfAddedTextCache.Match(aContainer, aStartIndex)) {
mEndOfAddedTextCache.Clear();
rv = ContentEventHandler::GetFlatTextOffsetOfRange(mRootContent, aContainer,
aStartIndex, &offset,
LINE_BREAK_TYPE_NATIVE);
if (NS_WARN_IF(NS_FAILED((rv)))) {
return;
}
} else {
offset = mEndOfAddedTextCache.mFlatTextLength;
}
// get offset at the end of the last added node
nsIContent* childAtStart = aContainer->GetChildAt(aStartIndex);
uint32_t addingLength = 0;
rv = ContentEventHandler::GetFlatTextOffsetOfRange(childAtStart, aContainer,
aEndIndex, &addingLength,
LINE_BREAK_TYPE_NATIVE);
if (NS_WARN_IF(NS_FAILED((rv)))) {
mEndOfAddedTextCache.Clear();
return;
}
// If multiple lines are being inserted in an HTML editor, next call of
// NotifyContentAdded() is for adding next node. Therefore, caching the text
// length can skip to compute the text length before the adding node and
// before of it.
mEndOfAddedTextCache.Cache(aContainer, aEndIndex, offset + addingLength);
if (!addingLength) {
return;
}
TextChangeData data(offset, offset, offset + addingLength,
causedByComposition);
MaybeNotifyIMEOfTextChange(data);
}
void
IMEContentObserver::CharacterDataChanged(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
NS_ASSERTION(aContent->IsNodeOfType(nsINode::eTEXT),
"character data changed for non-text node");
mEndOfAddedTextCache.Clear();
mStartOfRemovingTextRangeCache.Clear();
int64_t removedLength = mPreCharacterDataChangeLength;
mPreCharacterDataChangeLength = -1;
bool causedByComposition = IsEditorHandlingEventForComposition();
if (!mTextChangeData.IsValid() && causedByComposition &&
!mUpdatePreference.WantChangesCausedByComposition()) {
return;
}
MOZ_ASSERT(removedLength >= 0,
"mPreCharacterDataChangeLength should've been set by "
"CharacterDataWillChange()");
uint32_t offset = 0;
// get offsets of change and fire notification
nsresult rv =
ContentEventHandler::GetFlatTextOffsetOfRange(mRootContent, aContent,
aInfo->mChangeStart,
&offset,
LINE_BREAK_TYPE_NATIVE);
NS_ENSURE_SUCCESS_VOID(rv);
uint32_t newLength =
ContentEventHandler::GetNativeTextLength(aContent, aInfo->mChangeStart,
aInfo->mChangeStart +
aInfo->mReplaceLength);
uint32_t oldEnd = offset + static_cast<uint32_t>(removedLength);
uint32_t newEnd = offset + newLength;
TextChangeData data(offset, oldEnd, newEnd, causedByComposition);
MaybeNotifyIMEOfTextChange(data);
}
nsresult
IMEContentObserver::NotifySelectionChanged(nsIDOMDocument* aDOMDocument,
nsISelection* aSelection,
int16_t aReason)
{
bool causedByComposition = IsEditorHandlingEventForComposition();
if (causedByComposition &&
!mUpdatePreference.WantChangesCausedByComposition()) {
return NS_OK;
}
int32_t count = 0;
nsresult rv = aSelection->GetRangeCount(&count);
NS_ENSURE_SUCCESS(rv, rv);
if (count > 0 && mWidget) {
nsContentUtils::AddScriptRunner(
new SelectionChangeEvent(this, causedByComposition));
}
return NS_OK;
}
nsresult
IMEContentObserver::NotifySelectionChanged(nsIDOMDocument* aDOMDocument,
nsISelection* aSelection,
int16_t aReason)
{
bool causedByComposition = IsEditorHandlingEventForComposition();
if (causedByComposition &&
!mUpdatePreference.WantChangesCausedByComposition()) {
return NS_OK;
}
int32_t count = 0;
nsresult rv = aSelection->GetRangeCount(&count);
NS_ENSURE_SUCCESS(rv, rv);
if (count > 0 && mWidget) {
bool causedBySelectionEvent = TextComposition::IsHandlingSelectionEvent();
MaybeNotifyIMEOfSelectionChange(causedByComposition,
causedBySelectionEvent);
}
return NS_OK;
}
void
IMEContentObserver::AttributeChanged(nsIDocument* aDocument,
dom::Element* aElement,
int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType,
const nsAttrValue* aOldValue)
{
mEndOfAddedTextCache.Clear();
mStartOfRemovingTextRangeCache.Clear();
bool causedByComposition = IsEditorHandlingEventForComposition();
if (!mTextChangeData.IsValid() && causedByComposition &&
!mUpdatePreference.WantChangesCausedByComposition()) {
return;
}
nsIContent *content = GetContentBR(aElement);
if (!content) {
return;
}
uint32_t postAttrChangeLength =
ContentEventHandler::GetNativeTextLength(content);
if (postAttrChangeLength == mPreAttrChangeLength) {
return;
}
uint32_t start;
nsresult rv =
ContentEventHandler::GetFlatTextOffsetOfRange(mRootContent, content,
0, &start,
LINE_BREAK_TYPE_NATIVE);
NS_ENSURE_SUCCESS_VOID(rv);
TextChangeData data(start, start + mPreAttrChangeLength,
start + postAttrChangeLength, causedByComposition);
MaybeNotifyIMEOfTextChange(data);
}