Source code

Revision control

Other Tools

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CompositionTransaction.h"
#include "mozilla/EditorBase.h" // mEditorBase
#include "mozilla/Logging.h"
#include "mozilla/SelectionState.h" // RangeUpdater
#include "mozilla/TextComposition.h" // TextComposition
#include "mozilla/ToString.h"
#include "mozilla/dom/Selection.h" // local var
#include "mozilla/dom/Text.h" // mTextNode
#include "nsAString.h" // params
#include "nsDebug.h" // for NS_ASSERTION, etc
#include "nsError.h" // for NS_SUCCEEDED, NS_FAILED, etc
#include "nsRange.h" // local var
#include "nsISelectionController.h" // for nsISelectionController constants
#include "nsQueryObject.h" // for do_QueryObject
namespace mozilla {
using namespace dom;
// static
already_AddRefed<CompositionTransaction> CompositionTransaction::Create(
EditorBase& aEditorBase, const nsAString& aStringToInsert,
const EditorDOMPointInText& aPointToInsert) {
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
TextComposition* composition = aEditorBase.GetComposition();
MOZ_RELEASE_ASSERT(composition);
// XXX Actually, we get different text node and offset from editor in some
// cases. If composition stores text node, we should use it and offset
// in it.
EditorDOMPointInText pointToInsert;
if (Text* textNode = composition->GetContainerTextNode()) {
pointToInsert.Set(textNode, composition->XPOffsetInTextNode());
NS_WARNING_ASSERTION(
pointToInsert.GetContainerAsText() ==
composition->GetContainerTextNode(),
"The editor tries to insert composition string into different node");
NS_WARNING_ASSERTION(
pointToInsert.Offset() == composition->XPOffsetInTextNode(),
"The editor tries to insert composition string into different offset");
} else {
pointToInsert = aPointToInsert;
}
RefPtr<CompositionTransaction> transaction =
new CompositionTransaction(aEditorBase, aStringToInsert, pointToInsert);
// XXX Now, it might be better to modify the text node information of
// the TextComposition instance in DoTransaction() because updating
// the information before changing actual DOM tree is pretty odd.
composition->OnCreateCompositionTransaction(
aStringToInsert, pointToInsert.ContainerAsText(), pointToInsert.Offset());
return transaction.forget();
}
CompositionTransaction::CompositionTransaction(
EditorBase& aEditorBase, const nsAString& aStringToInsert,
const EditorDOMPointInText& aPointToInsert)
: mTextNode(aPointToInsert.ContainerAsText()),
mOffset(aPointToInsert.Offset()),
mReplaceLength(aEditorBase.GetComposition()->XPLengthInTextNode()),
mRanges(aEditorBase.GetComposition()->GetRanges()),
mStringToInsert(aStringToInsert),
mEditorBase(&aEditorBase),
mFixed(false) {
MOZ_ASSERT(mTextNode->TextLength() >= mOffset);
}
std::ostream& operator<<(std::ostream& aStream,
const CompositionTransaction& aTransaction) {
aStream << "{ mTextNode=" << aTransaction.mTextNode.get();
if (aTransaction.mTextNode) {
aStream << " (" << *aTransaction.mTextNode << ")";
}
aStream << ", mOffset=" << aTransaction.mOffset
<< ", mReplaceLength=" << aTransaction.mReplaceLength
<< ", mRanges={ Length()=" << aTransaction.mRanges->Length() << " }"
<< ", mStringToInsert=\""
<< NS_ConvertUTF16toUTF8(aTransaction.mStringToInsert).get() << "\""
<< ", mEditorBase=" << aTransaction.mEditorBase.get() << " }";
return aStream;
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(CompositionTransaction, EditTransactionBase,
mEditorBase, mTextNode)
// mRangeList can't lead to cycles
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CompositionTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
NS_IMPL_ADDREF_INHERITED(CompositionTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(CompositionTransaction, EditTransactionBase)
NS_IMETHODIMP CompositionTransaction::DoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p CompositionTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
return NS_ERROR_NOT_AVAILABLE;
}
// Fail before making any changes if there's no selection controller
if (NS_WARN_IF(!mEditorBase->GetSelectionController())) {
return NS_ERROR_NOT_AVAILABLE;
}
OwningNonNull<EditorBase> editorBase = *mEditorBase;
OwningNonNull<Text> textNode = *mTextNode;
// Advance caret: This requires the presentation shell to get the selection.
if (mReplaceLength == 0) {
ErrorResult error;
editorBase->DoInsertText(textNode, mOffset, mStringToInsert, error);
if (error.Failed()) {
NS_WARNING("EditorBase::DoInsertText() failed");
return error.StealNSResult();
}
editorBase->RangeUpdaterRef().SelAdjInsertText(textNode, mOffset,
mStringToInsert.Length());
} else {
// If composition string is split to multiple text nodes, we should put
// whole new composition string to the first text node and remove the
// compostion string in other nodes.
uint32_t replaceableLength = textNode->TextLength() - mOffset;
ErrorResult error;
editorBase->DoReplaceText(textNode, mOffset, mReplaceLength,
mStringToInsert, error);
if (error.Failed()) {
NS_WARNING("EditorBase::DoReplaceText() failed");
return error.StealNSResult();
}
// Don't use RangeUpdaterRef().SelAdjReplaceText() here because undoing
// this transaction will remove whole composition string. Therefore,
// selection should be restored at start of composition string.
// XXX Perhaps, this is a bug of our selection managemnt at undoing.
editorBase->RangeUpdaterRef().SelAdjDeleteText(textNode, mOffset,
replaceableLength);
// But some ranges which after the composition string should be restored
// as-is.
editorBase->RangeUpdaterRef().SelAdjInsertText(textNode, mOffset,
mStringToInsert.Length());
if (replaceableLength < mReplaceLength) {
// XXX Perhaps, scanning following sibling text nodes with composition
// string length which we know is wrong because there may be
// non-empty text nodes which are inserted by JS. Instead, we
// should remove all text in the ranges of IME selections.
uint32_t remainLength = mReplaceLength - replaceableLength;
IgnoredErrorResult ignoredError;
for (nsIContent* nextSibling = textNode->GetNextSibling();
nextSibling && nextSibling->IsText() && remainLength;
nextSibling = nextSibling->GetNextSibling()) {
OwningNonNull<Text> followingTextNode =
*static_cast<Text*>(nextSibling);
uint32_t textLength = followingTextNode->TextLength();
editorBase->DoDeleteText(followingTextNode, 0, remainLength,
ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"EditorBase::DoDeleteText() failed, but ignored");
ignoredError.SuppressException();
// XXX Needs to check whether the text is deleted as expected.
editorBase->RangeUpdaterRef().SelAdjDeleteText(followingTextNode, 0,
remainLength);
remainLength -= textLength;
}
}
}
nsresult rv = SetSelectionForRanges();
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"CompositionTransaction::SetSelectionForRanges() failed");
return rv;
}
NS_IMETHODIMP CompositionTransaction::UndoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p CompositionTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
return NS_ERROR_NOT_AVAILABLE;
}
// Get the selection first so we'll fail before making any changes if we
// can't get it
RefPtr<Selection> selection = mEditorBase->GetSelection();
if (NS_WARN_IF(!selection)) {
return NS_ERROR_NOT_AVAILABLE;
}
OwningNonNull<EditorBase> editorBase = *mEditorBase;
OwningNonNull<Text> textNode = *mTextNode;
ErrorResult error;
editorBase->DoDeleteText(textNode, mOffset, mStringToInsert.Length(), error);
if (error.Failed()) {
NS_WARNING("EditorBase::DoDeleteText() failed");
return error.StealNSResult();
}
// set the selection to the insertion point where the string was removed
nsresult rv = selection->CollapseInLimiter(textNode, mOffset);
NS_ASSERTION(NS_SUCCEEDED(rv), "Selection::CollapseInLimiter() failed");
return rv;
}
NS_IMETHODIMP CompositionTransaction::RedoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p CompositionTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
return DoTransaction();
}
NS_IMETHODIMP CompositionTransaction::Merge(nsITransaction* aOtherTransaction,
bool* aDidMerge) {
MOZ_LOG(GetLogModule(), LogLevel::Debug,
("%p CompositionTransaction::%s(aOtherTransaction=%p) this=%s", this,
__FUNCTION__, aOtherTransaction, ToString(*this).c_str()));
if (NS_WARN_IF(!aOtherTransaction) || NS_WARN_IF(!aDidMerge)) {
return NS_ERROR_INVALID_ARG;
}
*aDidMerge = false;
// Check to make sure we aren't fixed, if we are then nothing gets merged.
if (mFixed) {
MOZ_LOG(GetLogModule(), LogLevel::Debug,
("%p CompositionTransaction::%s returned false due to fixed", this,
__FUNCTION__));
return NS_OK;
}
RefPtr<EditTransactionBase> otherTransactionBase =
aOtherTransaction->GetAsEditTransactionBase();
if (!otherTransactionBase) {
MOZ_LOG(GetLogModule(), LogLevel::Debug,
("%p CompositionTransaction::%s returned false due to not edit "
"transaction",
this, __FUNCTION__));
return NS_OK;
}
// If aTransaction is another CompositionTransaction then merge it
CompositionTransaction* otherCompositionTransaction =
otherTransactionBase->GetAsCompositionTransaction();
if (!otherCompositionTransaction) {
return NS_OK;
}
// We merge the next IME transaction by adopting its insert string.
mStringToInsert = otherCompositionTransaction->mStringToInsert;
mRanges = otherCompositionTransaction->mRanges;
*aDidMerge = true;
MOZ_LOG(GetLogModule(), LogLevel::Debug,
("%p CompositionTransaction::%s returned true", this, __FUNCTION__));
return NS_OK;
}
void CompositionTransaction::MarkFixed() { mFixed = true; }
/* ============ private methods ================== */
nsresult CompositionTransaction::SetSelectionForRanges() {
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
return NS_ERROR_NOT_AVAILABLE;
}
OwningNonNull<EditorBase> editorBase = *mEditorBase;
OwningNonNull<Text> textNode = *mTextNode;
RefPtr<TextRangeArray> ranges = mRanges;
nsresult rv = SetIMESelection(editorBase, textNode, mOffset,
mStringToInsert.Length(), ranges);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"CompositionTransaction::SetIMESelection() failed");
return rv;
}
// static
nsresult CompositionTransaction::SetIMESelection(
EditorBase& aEditorBase, Text* aTextNode, uint32_t aOffsetInNode,
uint32_t aLengthOfCompositionString, const TextRangeArray* aRanges) {
RefPtr<Selection> selection = aEditorBase.GetSelection();
if (NS_WARN_IF(!selection)) {
return NS_ERROR_NOT_INITIALIZED;
}
SelectionBatcher selectionBatcher(selection);
// First, remove all selections of IME composition.
static const RawSelectionType kIMESelections[] = {
nsISelectionController::SELECTION_IME_RAWINPUT,
nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT,
nsISelectionController::SELECTION_IME_CONVERTEDTEXT,
nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT};
nsCOMPtr<nsISelectionController> selectionController =
aEditorBase.GetSelectionController();
if (NS_WARN_IF(!selectionController)) {
return NS_ERROR_NOT_INITIALIZED;
}
IgnoredErrorResult ignoredError;
for (uint32_t i = 0; i < ArrayLength(kIMESelections); ++i) {
RefPtr<Selection> selectionOfIME =
selectionController->GetSelection(kIMESelections[i]);
if (!selectionOfIME) {
NS_WARNING("nsISelectionController::GetSelection() failed");
continue;
}
selectionOfIME->RemoveAllRanges(ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"Selection::RemoveAllRanges() failed, but ignored");
ignoredError.SuppressException();
}
// Set caret position and selection of IME composition with TextRangeArray.
bool setCaret = false;
uint32_t countOfRanges = aRanges ? aRanges->Length() : 0;
#ifdef DEBUG
// Bounds-checking on debug builds
uint32_t maxOffset = aTextNode->Length();
#endif
// NOTE: composition string may be truncated when it's committed and
// maxlength attribute value doesn't allow input of all text of this
// composition.
nsresult rv = NS_OK;
for (uint32_t i = 0; i < countOfRanges; ++i) {
const TextRange& textRange = aRanges->ElementAt(i);
// Caret needs special handling since its length may be 0 and if it's not
// specified explicitly, we need to handle it ourselves later.
if (textRange.mRangeType == TextRangeType::eCaret) {
NS_ASSERTION(!setCaret, "The ranges already has caret position");
NS_ASSERTION(!textRange.Length(),
"EditorBase doesn't support wide caret");
CheckedUint32 caretOffset(aOffsetInNode);
caretOffset +=
std::min(textRange.mStartOffset, aLengthOfCompositionString);
MOZ_ASSERT(caretOffset.isValid());
MOZ_ASSERT(caretOffset.value() <= maxOffset);
rv = selection->CollapseInLimiter(aTextNode, caretOffset.value());
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"Selection::CollapseInLimiter() failed, but might be ignored");
setCaret = setCaret || NS_SUCCEEDED(rv);
if (!setCaret) {
continue;
}
// If caret range is specified explicitly, we should show the caret if
// it should be so.
aEditorBase.HideCaret(false);
continue;
}
// If the clause length is 0, it should be a bug.
if (!textRange.Length()) {
NS_WARNING("Any clauses must not be empty");
continue;
}
RefPtr<nsRange> clauseRange;
CheckedUint32 startOffset = aOffsetInNode;
startOffset += std::min(textRange.mStartOffset, aLengthOfCompositionString);
MOZ_ASSERT(startOffset.isValid());
MOZ_ASSERT(startOffset.value() <= maxOffset);
CheckedUint32 endOffset = aOffsetInNode;
endOffset += std::min(textRange.mEndOffset, aLengthOfCompositionString);
MOZ_ASSERT(endOffset.isValid());
MOZ_ASSERT(endOffset.value() >= startOffset.value());
MOZ_ASSERT(endOffset.value() <= maxOffset);
clauseRange = nsRange::Create(aTextNode, startOffset.value(), aTextNode,
endOffset.value(), IgnoreErrors());
if (!clauseRange) {
NS_WARNING("nsRange::Create() failed, but might be ignored");
break;
}
// Set the range of the clause to selection.
RefPtr<Selection> selectionOfIME = selectionController->GetSelection(
ToRawSelectionType(textRange.mRangeType));
if (!selectionOfIME) {
NS_WARNING(
"nsISelectionController::GetSelection() failed, but might be "
"ignored");
break;
}
IgnoredErrorResult ignoredError;
selectionOfIME->AddRangeAndSelectFramesAndNotifyListeners(*clauseRange,
ignoredError);
if (ignoredError.Failed()) {
NS_WARNING(
"Selection::AddRangeAndSelectFramesAndNotifyListeners() failed, but "
"might be ignored");
break;
}
// Set the style of the clause.
rv = selectionOfIME->SetTextRangeStyle(clauseRange, textRange.mRangeStyle);
if (NS_FAILED(rv)) {
NS_WARNING("Selection::SetTextRangeStyle() failed, but might be ignored");
break; // but this is unexpected...
}
}
// If the ranges doesn't include explicit caret position, let's set the
// caret to the end of composition string.
if (!setCaret) {
CheckedUint32 caretOffset = aOffsetInNode;
caretOffset += aLengthOfCompositionString;
MOZ_ASSERT(caretOffset.isValid());
MOZ_ASSERT(caretOffset.value() <= maxOffset);
rv = selection->CollapseInLimiter(aTextNode, caretOffset.value());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Selection::CollapseInLimiter() failed");
// If caret range isn't specified explicitly, we should hide the caret.
// Hiding the caret benefits a Windows build (see bug 555642 comment #6).
// However, when there is no range, we should keep showing caret.
if (countOfRanges) {
aEditorBase.HideCaret(true);
}
}
return rv;
}
} // namespace mozilla