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gecko-dev/editor/libeditor/TextEditRules.cpp

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/* -*- 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 "mozilla/TextEditRules.h"
#include "HTMLEditRules.h"
#include "TextEditUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/EditAction.h"
#include "mozilla/EditorDOMPoint.h"
#include "mozilla/EditorUtils.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/Preferences.h"
#include "mozilla/TextComposition.h"
#include "mozilla/TextEditor.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/NodeFilterBinding.h"
#include "mozilla/dom/NodeIterator.h"
#include "mozilla/dom/Selection.h"
#include "nsAString.h"
#include "nsCOMPtr.h"
#include "nsCRT.h"
#include "nsCRTGlue.h"
#include "nsComponentManagerUtils.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsGkAtoms.h"
#include "nsIContent.h"
#include "nsIDocumentEncoder.h"
#include "nsNameSpaceManager.h"
#include "nsINode.h"
#include "nsIPlaintextEditor.h"
#include "nsISupportsBase.h"
#include "nsLiteralString.h"
#include "nsTextNode.h"
#include "nsUnicharUtils.h"
#include "nsIHTMLCollection.h"
#include "nsPrintfCString.h"
namespace mozilla {
using namespace dom;
template CreateElementResult
TextEditRules::CreateBRInternal(const EditorDOMPoint& aPointToInsert,
bool aCreateMozBR);
template CreateElementResult
TextEditRules::CreateBRInternal(const EditorRawDOMPoint& aPointToInsert,
bool aCreateMozBR);
#define CANCEL_OPERATION_IF_READONLY_OR_DISABLED \
if (IsReadonly() || IsDisabled()) \
{ \
*aCancel = true; \
return NS_OK; \
};
/********************************************************
* mozilla::TextEditRules
********************************************************/
TextEditRules::TextEditRules()
: mTextEditor(nullptr)
, mData(nullptr)
, mPasswordIMEIndex(0)
, mCachedSelectionOffset(0)
, mActionNesting(0)
, mLockRulesSniffing(false)
, mDidExplicitlySetInterline(false)
, mDeleteBidiImmediately(false)
, mIsHTMLEditRules(false)
, mTopLevelEditSubAction(EditSubAction::eNone)
, mLastStart(0)
, mLastLength(0)
{
InitFields();
}
void
TextEditRules::InitFields()
{
mTextEditor = nullptr;
mPasswordText.Truncate();
mPasswordIMEText.Truncate();
mPasswordIMEIndex = 0;
mBogusNode = nullptr;
mCachedSelectionNode = nullptr;
mCachedSelectionOffset = 0;
mActionNesting = 0;
mLockRulesSniffing = false;
mDidExplicitlySetInterline = false;
mDeleteBidiImmediately = false;
mTopLevelEditSubAction = EditSubAction::eNone;
mTimer = nullptr;
mLastStart = 0;
mLastLength = 0;
}
TextEditRules::~TextEditRules()
{
// do NOT delete mTextEditor here. We do not hold a ref count to
// mTextEditor. mTextEditor owns our lifespan.
if (mTimer) {
mTimer->Cancel();
}
}
HTMLEditRules*
TextEditRules::AsHTMLEditRules()
{
return mIsHTMLEditRules ? static_cast<HTMLEditRules*>(this) : nullptr;
}
const HTMLEditRules*
TextEditRules::AsHTMLEditRules() const
{
return mIsHTMLEditRules ? static_cast<const HTMLEditRules*>(this) : nullptr;
}
NS_IMPL_CYCLE_COLLECTION(TextEditRules, mBogusNode, mCachedSelectionNode)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TextEditRules)
NS_INTERFACE_MAP_ENTRY(nsITimerCallback)
NS_INTERFACE_MAP_ENTRY(nsINamed)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsITimerCallback)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(TextEditRules)
NS_IMPL_CYCLE_COLLECTING_RELEASE(TextEditRules)
nsresult
TextEditRules::Init(TextEditor* aTextEditor)
{
if (NS_WARN_IF(!aTextEditor)) {
return NS_ERROR_INVALID_ARG;
}
Selection* selection = aTextEditor->GetSelection();
if (NS_WARN_IF(!selection)) {
return NS_ERROR_FAILURE;
}
InitFields();
// We hold a non-refcounted reference back to our editor.
mTextEditor = aTextEditor;
AutoSafeEditorData setData(*this, *mTextEditor);
// Put in a magic <br> if needed. This method handles null selection,
// which should never happen anyway
nsresult rv = CreateBogusNodeIfNeeded();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// If the selection hasn't been set up yet, set it up collapsed to the end of
// our editable content.
if (!SelectionRefPtr()->RangeCount()) {
rv = TextEditorRef().CollapseSelectionToEnd();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
if (IsPlaintextEditor()) {
// ensure trailing br node
rv = CreateTrailingBRIfNeeded();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// XXX We should use AddBoolVarCache and use "current" value at initializing.
mDeleteBidiImmediately =
Preferences::GetBool("bidi.edit.delete_immediately", false);
return NS_OK;
}
nsresult
TextEditRules::SetInitialValue(const nsAString& aValue)
{
if (IsPasswordEditor()) {
mPasswordText = aValue;
}
return NS_OK;
}
nsresult
TextEditRules::DetachEditor()
{
if (mTimer) {
mTimer->Cancel();
}
mTextEditor = nullptr;
return NS_OK;
}
nsresult
TextEditRules::BeforeEdit(EditSubAction aEditSubAction,
nsIEditor::EDirection aDirection)
{
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (mLockRulesSniffing) {
return NS_OK;
}
AutoLockRulesSniffing lockIt(this);
mDidExplicitlySetInterline = false;
if (!mActionNesting) {
// let rules remember the top level action
mTopLevelEditSubAction = aEditSubAction;
}
mActionNesting++;
if (aEditSubAction == EditSubAction::eSetText) {
// setText replaces all text, so mCachedSelectionNode might be invalid on
// AfterEdit.
// Since this will be used as start position of spellchecker, we should
// use root instead.
mCachedSelectionNode = mTextEditor->GetRoot();
mCachedSelectionOffset = 0;
} else {
Selection* selection = mTextEditor->GetSelection();
if (NS_WARN_IF(!selection)) {
return NS_ERROR_FAILURE;
}
mCachedSelectionNode = selection->GetAnchorNode();
mCachedSelectionOffset = selection->AnchorOffset();
}
return NS_OK;
}
nsresult
TextEditRules::AfterEdit(EditSubAction aEditSubAction,
nsIEditor::EDirection aDirection)
{
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (mLockRulesSniffing) {
return NS_OK;
}
AutoLockRulesSniffing lockIt(this);
MOZ_ASSERT(mActionNesting>0, "bad action nesting!");
if (!--mActionNesting) {
AutoSafeEditorData setData(*this, *mTextEditor);
nsresult rv =
TextEditorRef().HandleInlineSpellCheck(aEditSubAction,
mCachedSelectionNode,
mCachedSelectionOffset,
nullptr, 0, nullptr, 0);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// no longer uses mCachedSelectionNode, so release it.
mCachedSelectionNode = nullptr;
// if only trailing <br> remaining remove it
rv = RemoveRedundantTrailingBR();
if (NS_FAILED(rv)) {
return rv;
}
// detect empty doc
rv = CreateBogusNodeIfNeeded();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// ensure trailing br node
rv = CreateTrailingBRIfNeeded();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Collapse the selection to the trailing moz-<br> if it's at the end of
// our text node.
rv = CollapseSelectionToTrailingBRIfNeeded();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Failed to selection to after the text node in TextEditor");
}
return NS_OK;
}
nsresult
TextEditRules::WillDoAction(EditSubActionInfo& aInfo,
bool* aCancel,
bool* aHandled)
{
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
MOZ_ASSERT(aCancel);
MOZ_ASSERT(aHandled);
*aCancel = false;
*aHandled = false;
AutoSafeEditorData setData(*this, *mTextEditor);
// my kingdom for dynamic cast
switch (aInfo.mEditSubAction) {
case EditSubAction::eInsertParagraphSeparator:
UndefineCaretBidiLevel();
return WillInsertBreak(aCancel, aHandled, aInfo.maxLength);
case EditSubAction::eInsertText:
case EditSubAction::eInsertTextComingFromIME:
UndefineCaretBidiLevel();
return WillInsertText(aInfo.mEditSubAction, aCancel, aHandled,
aInfo.inString, aInfo.outString,
aInfo.maxLength);
case EditSubAction::eSetText:
UndefineCaretBidiLevel();
return WillSetText(aCancel, aHandled, aInfo.inString,
aInfo.maxLength);
case EditSubAction::eDeleteSelectedContent:
return WillDeleteSelection(aInfo.collapsedAction, aCancel, aHandled);
case EditSubAction::eUndo:
return WillUndo(aCancel, aHandled);
case EditSubAction::eRedo:
return WillRedo(aCancel, aHandled);
case EditSubAction::eSetTextProperty:
return WillSetTextProperty(aCancel, aHandled);
case EditSubAction::eRemoveTextProperty:
return WillRemoveTextProperty(aCancel, aHandled);
case EditSubAction::eComputeTextToOutput:
return WillOutputText(aInfo.outputFormat, aInfo.outString, aInfo.flags,
aCancel, aHandled);
case EditSubAction::eInsertElement:
// i had thought this would be html rules only. but we put pre elements
// into plaintext mail when doing quoting for reply! doh!
return WillInsert(aCancel);
default:
return NS_ERROR_FAILURE;
}
}
nsresult
TextEditRules::DidDoAction(EditSubActionInfo& aInfo,
nsresult aResult)
{
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
AutoSafeEditorData setData(*this, *mTextEditor);
// don't let any txns in here move the selection around behind our back.
// Note that this won't prevent explicit selection setting from working.
AutoTransactionsConserveSelection dontChangeMySelection(TextEditorRef());
switch (aInfo.mEditSubAction) {
case EditSubAction::eDeleteSelectedContent:
return DidDeleteSelection();
case EditSubAction::eUndo:
return DidUndo(aResult);
case EditSubAction::eRedo:
return DidRedo(aResult);
default:
// Don't fail on transactions we don't handle here!
return NS_OK;
}
}
bool
TextEditRules::DocumentIsEmpty()
{
bool retVal = false;
if (!mTextEditor || NS_FAILED(mTextEditor->IsEmpty(&retVal))) {
retVal = true;
}
return retVal;
}
nsresult
TextEditRules::WillInsert(bool* aCancel)
{
MOZ_ASSERT(IsEditorDataAvailable());
if (IsReadonly() || IsDisabled()) {
if (aCancel) {
*aCancel = true;
}
return NS_OK;
}
// initialize out param
if (aCancel) {
*aCancel = false;
}
// check for the magic content node and delete it if it exists
if (!mBogusNode) {
return NS_OK;
}
DebugOnly<nsresult> rv =
TextEditorRef().DeleteNodeWithTransaction(*mBogusNode);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Failed to remove the bogus node");
mBogusNode = nullptr;
return NS_OK;
}
nsresult
TextEditRules::WillInsertBreak(bool* aCancel,
bool* aHandled,
int32_t aMaxLength)
{
MOZ_ASSERT(IsEditorDataAvailable());
if (NS_WARN_IF(!aCancel) || NS_WARN_IF(!aHandled)) {
return NS_ERROR_INVALID_ARG;
}
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
*aHandled = false;
if (IsSingleLineEditor()) {
*aCancel = true;
} else {
// handle docs with a max length
// NOTE, this function copies inString into outString for us.
NS_NAMED_LITERAL_STRING(inString, "\n");
nsAutoString outString;
bool didTruncate;
nsresult rv =
TruncateInsertionIfNeeded(&inString.AsString(),
&outString, aMaxLength, &didTruncate);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (didTruncate) {
*aCancel = true;
return NS_OK;
}
*aCancel = false;
// if the selection isn't collapsed, delete it.
if (!SelectionRefPtr()->IsCollapsed()) {
rv = TextEditorRef().DeleteSelectionAsSubAction(nsIEditor::eNone,
nsIEditor::eStrip);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
rv = WillInsert();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return NS_OK;
}
nsresult
TextEditRules::CollapseSelectionToTrailingBRIfNeeded()
{
MOZ_ASSERT(IsEditorDataAvailable());
// we only need to execute the stuff below if we are a plaintext editor.
// html editors have a different mechanism for putting in mozBR's
// (because there are a bunch more places you have to worry about it in html)
if (!IsPlaintextEditor()) {
return NS_OK;
}
// If there is no selection ranges, we should set to the end of the editor.
// This is usually performed in TextEditRules::Init(), however, if the
// editor is reframed, this may be called by AfterEdit().
if (!SelectionRefPtr()->RangeCount()) {
TextEditorRef().CollapseSelectionToEnd();
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
}
// If we are at the end of the <textarea> element, we need to set the
// selection to stick to the moz-<br> at the end of the <textarea>.
EditorRawDOMPoint selectionStartPoint(
EditorBase::GetStartPoint(*SelectionRefPtr()));
if (NS_WARN_IF(!selectionStartPoint.IsSet())) {
return NS_ERROR_FAILURE;
}
// Nothing to do if we're not at the end of the text node.
if (!selectionStartPoint.IsInTextNode() ||
!selectionStartPoint.IsEndOfContainer()) {
return NS_OK;
}
Element* rootElement = TextEditorRef().GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_NULL_POINTER;
}
nsINode* parentNode = selectionStartPoint.GetContainer()->GetParentNode();
if (parentNode != rootElement) {
return NS_OK;
}
nsINode* nextNode = selectionStartPoint.GetContainer()->GetNextSibling();
if (!nextNode || !TextEditUtils::IsMozBR(nextNode)) {
return NS_OK;
}
EditorRawDOMPoint afterStartContainer(selectionStartPoint.GetContainer());
if (NS_WARN_IF(!afterStartContainer.AdvanceOffset())) {
return NS_ERROR_FAILURE;
}
ErrorResult error;
SelectionRefPtr()->Collapse(afterStartContainer, error);
if (NS_WARN_IF(!CanHandleEditAction())) {
error.SuppressException();
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
return NS_OK;
}
already_AddRefed<nsINode>
TextEditRules::GetTextNodeAroundSelectionStartContainer()
{
MOZ_ASSERT(IsEditorDataAvailable());
EditorRawDOMPoint selectionStartPoint(
EditorBase::GetStartPoint(*SelectionRefPtr()));
if (NS_WARN_IF(!selectionStartPoint.IsSet())) {
return nullptr;
}
if (selectionStartPoint.IsInTextNode()) {
nsCOMPtr<nsINode> node = selectionStartPoint.GetContainer();
return node.forget();
}
// This should be the root node, walk the tree looking for text nodes.
// XXX NodeIterator sets mutation observer even for this temporary use.
// It's too expensive if this is called from a hot path.
nsCOMPtr<nsINode> node = selectionStartPoint.GetContainer();
RefPtr<NodeIterator> iter =
new NodeIterator(node, NodeFilter_Binding::SHOW_TEXT, nullptr);
while (!EditorBase::IsTextNode(node)) {
node = iter->NextNode(IgnoreErrors());
if (!node) {
return nullptr;
}
}
return node.forget();
}
#ifdef DEBUG
#define ASSERT_PASSWORD_LENGTHS_EQUAL() \
if (IsPasswordEditor() && mTextEditor->GetRoot()) { \
int32_t txtLen; \
mTextEditor->GetTextLength(&txtLen); \
NS_ASSERTION(mPasswordText.Length() == uint32_t(txtLen), \
"password length not equal to number of asterisks"); \
}
#else
#define ASSERT_PASSWORD_LENGTHS_EQUAL()
#endif
void
TextEditRules::HandleNewLines(nsString& aString)
{
static const char16_t kLF = static_cast<char16_t>('\n');
MOZ_ASSERT(IsEditorDataAvailable());
MOZ_ASSERT(aString.FindChar(static_cast<uint16_t>('\r')) == kNotFound);
// First of all, check if aString contains '\n' since if the string
// does not include it, we don't need to do nothing here.
int32_t firstLF = aString.FindChar(kLF, 0);
if (firstLF == kNotFound) {
return;
}
switch(TextEditorRef().mNewlineHandling) {
case nsIPlaintextEditor::eNewlinesReplaceWithSpaces:
// Default of Firefox:
// Strip trailing newlines first so we don't wind up with trailing spaces
aString.Trim(LFSTR, false, true);
aString.ReplaceChar(kLF, ' ');
break;
case nsIPlaintextEditor::eNewlinesStrip:
aString.StripChar(kLF);
break;
case nsIPlaintextEditor::eNewlinesPasteToFirst:
default: {
// we get first *non-empty* line.
int32_t offset = 0;
while (firstLF == offset) {
offset++;
firstLF = aString.FindChar(kLF, offset);
}
if (firstLF > 0) {
aString.Truncate(firstLF);
}
if (offset > 0) {
aString.Cut(0, offset);
}
break;
}
case nsIPlaintextEditor::eNewlinesReplaceWithCommas:
// Default of Thunderbird:
aString.Trim(LFSTR, true, true);
aString.ReplaceChar(kLF, ',');
break;
case nsIPlaintextEditor::eNewlinesStripSurroundingWhitespace: {
nsAutoString result;
uint32_t offset = 0;
while (offset < aString.Length()) {
int32_t nextLF =
!offset ? firstLF : aString.FindChar(kLF, offset);
if (nextLF < 0) {
result.Append(nsDependentSubstring(aString, offset));
break;
}
uint32_t wsBegin = nextLF;
// look backwards for the first non-whitespace char
while (wsBegin > offset && NS_IS_SPACE(aString[wsBegin - 1])) {
--wsBegin;
}
result.Append(nsDependentSubstring(aString, offset, wsBegin - offset));
offset = nextLF + 1;
while (offset < aString.Length() && NS_IS_SPACE(aString[offset])) {
++offset;
}
}
aString = result;
break;
}
case nsIPlaintextEditor::eNewlinesPasteIntact:
// even if we're pasting newlines, don't paste leading/trailing ones
aString.Trim(LFSTR, true, true);
break;
}
}
nsresult
TextEditRules::WillInsertText(EditSubAction aEditSubAction,
bool* aCancel,
bool* aHandled,
const nsAString* inString,
nsAString* outString,
int32_t aMaxLength)
{
MOZ_ASSERT(IsEditorDataAvailable());
if (NS_WARN_IF(!aCancel) || NS_WARN_IF(!aHandled)) {
return NS_ERROR_INVALID_ARG;
}
if (inString->IsEmpty() &&
aEditSubAction != EditSubAction::eInsertTextComingFromIME) {
// HACK: this is a fix for bug 19395
// I can't outlaw all empty insertions
// because IME transaction depend on them
// There is more work to do to make the
// world safe for IME.
*aCancel = true;
*aHandled = false;
return NS_OK;
}
// initialize out param
*aCancel = false;
*aHandled = true;
// handle docs with a max length
// NOTE, this function copies inString into outString for us.
bool truncated = false;
nsresult rv =
TruncateInsertionIfNeeded(inString, outString, aMaxLength, &truncated);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// If we're exceeding the maxlength when composing IME, we need to clean up
// the composing text, so we shouldn't return early.
if (truncated && outString->IsEmpty() &&
aEditSubAction != EditSubAction::eInsertTextComingFromIME) {
*aCancel = true;
return NS_OK;
}
uint32_t start = 0;
uint32_t end = 0;
// handle password field docs
if (IsPasswordEditor()) {
nsContentUtils::GetSelectionInTextControl(SelectionRefPtr(),
TextEditorRef().GetRoot(),
start, end);
}
// if the selection isn't collapsed, delete it.
if (!SelectionRefPtr()->IsCollapsed()) {
rv = TextEditorRef().DeleteSelectionAsSubAction(nsIEditor::eNone,
nsIEditor::eStrip);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
rv = WillInsert(aCancel);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// handle password field data
// this has the side effect of changing all the characters in aOutString
// to the replacement character
if (IsPasswordEditor() &&
aEditSubAction == EditSubAction::eInsertTextComingFromIME) {
RemoveIMETextFromPWBuf(start, outString);
}
// People have lots of different ideas about what text fields
// should do with multiline pastes. See bugs 21032, 23485, 23485, 50935.
// The six possible options are:
// 0. paste newlines intact
// 1. paste up to the first newline (default)
// 2. replace newlines with spaces
// 3. strip newlines
// 4. replace with commas
// 5. strip newlines and surrounding whitespace
// So find out what we're expected to do:
if (IsSingleLineEditor()) {
nsAutoString tString(*outString);
// XXX Some callers of TextEditor::InsertTextAsAction() already make the
// string use only \n as a linebreaker. However, they are not hot
// path and nsContentUtils::PlatformToDOMLineBreaks() does nothing
// if the string doesn't include \r. So, let's convert linebreakers
// here. Note that there are too many callers of
// TextEditor::InsertTextAsAction(). So, it's difficult to keep
// maintaining all of them won't reach here without \r nor \r\n.
nsContentUtils::PlatformToDOMLineBreaks(tString);
HandleNewLines(tString);
outString->Assign(tString);
}
if (IsPasswordEditor()) {
// manage the password buffer
mPasswordText.Insert(*outString, start);
if (LookAndFeel::GetEchoPassword() && !DontEchoPassword()) {
nsresult rv = HideLastPasswordInputInternal();
mLastStart = start;
mLastLength = outString->Length();
if (mTimer) {
mTimer->Cancel();
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!mTimer) {
mTimer = NS_NewTimer();
}
mTimer->InitWithCallback(this, LookAndFeel::GetPasswordMaskDelay(),
nsITimer::TYPE_ONE_SHOT);
} else {
FillBufWithPWChars(outString, outString->Length());
}
}
// get the (collapsed) selection location
nsRange* firstRange = SelectionRefPtr()->GetRangeAt(0);
if (NS_WARN_IF(!firstRange)) {
return NS_ERROR_FAILURE;
}
EditorRawDOMPoint atStartOfSelection(firstRange->StartRef());
if (NS_WARN_IF(!atStartOfSelection.IsSetAndValid())) {
return NS_ERROR_FAILURE;
}
// don't put text in places that can't have it
if (!atStartOfSelection.IsInTextNode() &&
!TextEditorRef().CanContainTag(*atStartOfSelection.GetContainer(),
*nsGkAtoms::textTagName)) {
return NS_ERROR_FAILURE;
}
// we need to get the doc
nsCOMPtr<nsIDocument> doc = TextEditorRef().GetDocument();
if (NS_WARN_IF(!doc)) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aEditSubAction == EditSubAction::eInsertTextComingFromIME) {
// Find better insertion point to insert text.
EditorRawDOMPoint betterInsertionPoint =
TextEditorRef().FindBetterInsertionPoint(atStartOfSelection);
// If there is one or more IME selections, its minimum offset should be
// the insertion point.
int32_t IMESelectionOffset =
TextEditorRef().GetIMESelectionStartOffsetIn(
betterInsertionPoint.GetContainer());
if (IMESelectionOffset >= 0) {
betterInsertionPoint.Set(betterInsertionPoint.GetContainer(),
IMESelectionOffset);
}
rv = TextEditorRef().InsertTextWithTransaction(*doc, *outString,
betterInsertionPoint);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
} else {
// aEditSubAction == EditSubAction::eInsertText
// don't change my selection in subtransactions
AutoTransactionsConserveSelection dontChangeMySelection(TextEditorRef());
EditorRawDOMPoint pointAfterStringInserted;
rv = TextEditorRef().InsertTextWithTransaction(*doc, *outString,
atStartOfSelection,
&pointAfterStringInserted);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (pointAfterStringInserted.IsSet()) {
// Make the caret attach to the inserted text, unless this text ends with a LF,
// in which case make the caret attach to the next line.
bool endsWithLF =
!outString->IsEmpty() && outString->Last() == nsCRT::LF;
IgnoredErrorResult error;
SelectionRefPtr()->SetInterlinePosition(endsWithLF, error);
NS_WARNING_ASSERTION(!error.Failed(),
"Failed to set or unset interline position");
MOZ_ASSERT(!pointAfterStringInserted.GetChild(),
"After inserting text into a text node, pointAfterStringInserted."
"GetChild() should be nullptr");
error = IgnoredErrorResult();
SelectionRefPtr()->Collapse(pointAfterStringInserted, error);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(!error.Failed(),
"Failed to collapse selection after inserting string");
}
}
ASSERT_PASSWORD_LENGTHS_EQUAL()
return NS_OK;
}
nsresult
TextEditRules::WillSetText(bool* aCancel,
bool* aHandled,
const nsAString* aString,
int32_t aMaxLength)
{
MOZ_ASSERT(IsEditorDataAvailable());
MOZ_ASSERT(aCancel);
MOZ_ASSERT(aHandled);
MOZ_ASSERT(aString);
MOZ_ASSERT(aString->FindChar(static_cast<char16_t>('\r')) == kNotFound);
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
*aHandled = false;
*aCancel = false;
if (!IsPlaintextEditor() ||
TextEditorRef().IsIMEComposing() ||
TextEditorRef().IsUndoRedoEnabled() ||
aMaxLength != -1) {
// SetTextImpl only supports plain text editor without IME and
// when we don't need to make it undoable.
return NS_OK;
}
if (IsPasswordEditor() && LookAndFeel::GetEchoPassword() &&
!DontEchoPassword()) {
// Echo password timer will implement on InsertText.
return NS_OK;
}
nsresult rv = WillInsert(aCancel);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
RefPtr<Element> rootElement = TextEditorRef().GetRoot();
uint32_t count = rootElement->GetChildCount();
// handles only when there is only one node and it's a text node, or empty.
if (count > 1) {
return NS_OK;
}
nsAutoString tString(*aString);
if (IsPasswordEditor()) {
mPasswordText.Assign(tString);
FillBufWithPWChars(&tString, tString.Length());
} else if (IsSingleLineEditor()) {
HandleNewLines(tString);
}
if (!count) {
if (tString.IsEmpty()) {
*aHandled = true;
return NS_OK;
}
RefPtr<nsIDocument> doc = TextEditorRef().GetDocument();
if (NS_WARN_IF(!doc)) {
return NS_OK;
}
RefPtr<nsTextNode> newNode = EditorBase::CreateTextNode(*doc, tString);
if (NS_WARN_IF(!newNode)) {
return NS_OK;
}
nsresult rv =
TextEditorRef().InsertNodeWithTransaction(
*newNode, EditorRawDOMPoint(rootElement, 0));
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
*aHandled = true;
ASSERT_PASSWORD_LENGTHS_EQUAL();
return NS_OK;
}
nsINode* curNode = rootElement->GetFirstChild();
if (NS_WARN_IF(!EditorBase::IsTextNode(curNode))) {
return NS_OK;
}
// Even if empty text, we don't remove text node and set empty text
// for performance
rv = TextEditorRef().SetTextImpl(tString, *curNode->GetAsText());
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
*aHandled = true;
ASSERT_PASSWORD_LENGTHS_EQUAL();
return NS_OK;
}
nsresult
TextEditRules::WillSetTextProperty(bool* aCancel,
bool* aHandled)
{
if (NS_WARN_IF(!aCancel) || NS_WARN_IF(!aHandled)) {
return NS_ERROR_INVALID_ARG;
}
// XXX: should probably return a success value other than NS_OK that means "not allowed"
if (IsPlaintextEditor()) {
*aCancel = true;
}
return NS_OK;
}
nsresult
TextEditRules::WillRemoveTextProperty(bool* aCancel,
bool* aHandled)
{
if (NS_WARN_IF(!aCancel) || NS_WARN_IF(!aHandled)) {
return NS_ERROR_INVALID_ARG;
}
// XXX: should probably return a success value other than NS_OK that means "not allowed"
if (IsPlaintextEditor()) {
*aCancel = true;
}
return NS_OK;
}
nsresult
TextEditRules::WillDeleteSelection(nsIEditor::EDirection aCollapsedAction,
bool* aCancel,
bool* aHandled)
{
MOZ_ASSERT(IsEditorDataAvailable());
if (NS_WARN_IF(!aCancel) || NS_WARN_IF(!aHandled)) {
return NS_ERROR_INVALID_ARG;
}
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = false;
*aHandled = false;
// if there is only bogus content, cancel the operation
if (mBogusNode) {
*aCancel = true;
return NS_OK;
}
nsresult rv =
DeleteSelectionWithTransaction(aCollapsedAction, aCancel, aHandled);
// DeleteSelectionWithTransaction() creates SelectionBatcher. Therefore,
// quitting from it might cause having destroyed the editor.
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult
TextEditRules::DeleteSelectionWithTransaction(
nsIEditor::EDirection aCollapsedAction,
bool* aCancel,
bool* aHandled)
{
MOZ_ASSERT(IsEditorDataAvailable());
MOZ_ASSERT(aCancel);
MOZ_ASSERT(aHandled);
// If the current selection is empty (e.g the user presses backspace with
// a collapsed selection), then we want to avoid sending the selectstart
// event to the user, so we hide selection changes. However, we still
// want to send a single selectionchange event to the document, so we
// batch the selectionchange events, such that a single event fires after
// the AutoHideSelectionChanges destructor has been run.
SelectionBatcher selectionBatcher(SelectionRefPtr());
AutoHideSelectionChanges hideSelection(SelectionRefPtr());
nsAutoScriptBlocker scriptBlocker;
if (IsPasswordEditor()) {
nsresult rv = TextEditorRef().ExtendSelectionForDelete(&aCollapsedAction);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// manage the password buffer
uint32_t start, end;
nsContentUtils::GetSelectionInTextControl(SelectionRefPtr(),
TextEditorRef().GetRoot(),
start, end);
if (LookAndFeel::GetEchoPassword()) {
rv = HideLastPasswordInputInternal();
mLastStart = start;
mLastLength = 0;
if (mTimer) {
mTimer->Cancel();
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// Collapsed selection.
if (end == start) {
// Deleting back.
if (nsIEditor::ePrevious == aCollapsedAction && start > 0) {
mPasswordText.Cut(start-1, 1);
}
// Deleting forward.
else if (nsIEditor::eNext == aCollapsedAction) {
mPasswordText.Cut(start, 1);
}
// Otherwise nothing to do for this collapsed selection.
}
// Extended selection.
else {
mPasswordText.Cut(start, end-start);
}
} else {
EditorRawDOMPoint selectionStartPoint(
EditorBase::GetStartPoint(*SelectionRefPtr()));
if (NS_WARN_IF(!selectionStartPoint.IsSet())) {
return NS_ERROR_FAILURE;
}
if (!SelectionRefPtr()->IsCollapsed()) {
return NS_OK;
}
// Test for distance between caret and text that will be deleted
nsresult rv =
CheckBidiLevelForDeletion(selectionStartPoint, aCollapsedAction, aCancel);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (*aCancel) {
return NS_OK;
}
rv = TextEditorRef().ExtendSelectionForDelete(&aCollapsedAction);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
nsresult rv =
TextEditorRef().DeleteSelectionWithTransaction(aCollapsedAction,
nsIEditor::eStrip);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
*aHandled = true;
ASSERT_PASSWORD_LENGTHS_EQUAL()
return NS_OK;
}
nsresult
TextEditRules::DidDeleteSelection()
{
MOZ_ASSERT(IsEditorDataAvailable());
EditorRawDOMPoint selectionStartPoint(
EditorBase::GetStartPoint(*SelectionRefPtr()));
if (NS_WARN_IF(!selectionStartPoint.IsSet())) {
return NS_ERROR_FAILURE;
}
// Delete empty text nodes at selection.
if (selectionStartPoint.IsInTextNode() &&
!selectionStartPoint.GetContainer()->Length()) {
nsresult rv =
TextEditorRef().DeleteNodeWithTransaction(
*selectionStartPoint.GetContainer());
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
if (mDidExplicitlySetInterline) {
return NS_OK;
}
// We prevent the caret from sticking on the left of prior BR
// (i.e. the end of previous line) after this deletion. Bug 92124
ErrorResult err;
SelectionRefPtr()->SetInterlinePosition(true, err);
NS_WARNING_ASSERTION(!err.Failed(), "Failed to set interline position");
return err.StealNSResult();
}
nsresult
TextEditRules::WillUndo(bool* aCancel,
bool* aHandled)
{
if (NS_WARN_IF(!aCancel) || NS_WARN_IF(!aHandled)) {
return NS_ERROR_INVALID_ARG;
}
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = false;
*aHandled = false;
return NS_OK;
}
nsresult
TextEditRules::DidUndo(nsresult aResult)
{
MOZ_ASSERT(IsEditorDataAvailable());
// If aResult is an error, we return it.
if (NS_WARN_IF(NS_FAILED(aResult))) {
return aResult;
}
Element* rootElement = TextEditorRef().GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_FAILURE;
}
// The idea here is to see if the magic empty node has suddenly reappeared as
// the result of the undo. If it has, set our state so we remember it.
// There is a tradeoff between doing here and at redo, or doing it everywhere
// else that might care. Since undo and redo are relatively rare, it makes
// sense to take the (small) performance hit here.
nsIContent* node = TextEditorRef().GetLeftmostChild(rootElement);
if (node && TextEditorRef().IsMozEditorBogusNode(node)) {
mBogusNode = node;
} else {
mBogusNode = nullptr;
}
return aResult;
}
nsresult
TextEditRules::WillRedo(bool* aCancel,
bool* aHandled)
{
if (NS_WARN_IF(!aCancel) || NS_WARN_IF(!aHandled)) {
return NS_ERROR_INVALID_ARG;
}
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = false;
*aHandled = false;
return NS_OK;
}
nsresult
TextEditRules::DidRedo(nsresult aResult)
{
MOZ_ASSERT(IsEditorDataAvailable());
if (NS_FAILED(aResult)) {
return aResult; // if aResult is an error, we return it.
}
Element* rootElement = TextEditorRef().GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIHTMLCollection> nodeList =
rootElement->GetElementsByTagName(NS_LITERAL_STRING("br"));
MOZ_ASSERT(nodeList);
uint32_t len = nodeList->Length();
if (len != 1) {
// only in the case of one br could there be the bogus node
mBogusNode = nullptr;
return NS_OK;
}
Element* brElement = nodeList->Item(0);
if (TextEditorRef().IsMozEditorBogusNode(brElement)) {
mBogusNode = brElement;
} else {
mBogusNode = nullptr;
}
return NS_OK;
}
nsresult
TextEditRules::WillOutputText(const nsAString* aOutputFormat,
nsAString* aOutString,
uint32_t aFlags,
bool* aCancel,
bool* aHandled)
{
MOZ_ASSERT(IsEditorDataAvailable());
// null selection ok
if (NS_WARN_IF(!aOutString) || NS_WARN_IF(!aOutputFormat) ||
NS_WARN_IF(!aCancel) || NS_WARN_IF(!aHandled)) {
return NS_ERROR_NULL_POINTER;
}
// initialize out param
*aCancel = false;
*aHandled = false;
if (!aOutputFormat->LowerCaseEqualsLiteral("text/plain")) {
return NS_OK;
}
// XXX Looks like that even if it's password field, we need to use the
// expensive path if the caller requests some complicated handling.
// However, changing the behavior for password field might cause
// security issue. So, be careful when you touch here.
if (IsPasswordEditor()) {
*aOutString = mPasswordText;
*aHandled = true;
return NS_OK;
}
// If there is a bogus node, there's no content. So output empty string.
if (mBogusNode) {
aOutString->Truncate();
*aHandled = true;
return NS_OK;
}
// If it's necessary to check selection range or the editor wraps hard,
// we need some complicated handling. In such case, we need to use the
// expensive path.
// XXX Anything else what we cannot return plain text simply?
if (aFlags & nsIDocumentEncoder::OutputSelectionOnly ||
aFlags & nsIDocumentEncoder::OutputWrap) {
return NS_OK;
}
// If it's neither <input type="text"> nor <textarea>, e.g., an HTML editor
// which is in plaintext mode (e.g., plaintext email composer on Thunderbird),
// it should be handled by the expensive path.
if (TextEditorRef().AsHTMLEditor()) {
return NS_OK;
}
Element* root = TextEditorRef().GetRoot();
if (!root) { // Don't warn it, this is possible, e.g., 997805.html
aOutString->Truncate();
*aHandled = true;
return NS_OK;
}
nsIContent* firstChild = root->GetFirstChild();
if (!firstChild) {
aOutString->Truncate();
*aHandled = true;
return NS_OK;
}
// If it's an <input type="text"> element, the DOM tree should be:
// <div class="anonymous-div">
// #text
// </div>
//
// If it's a <textarea> element, the DOM tree should be:
// <div class="anonymous-div">
// #text (if there is)
// <br type="_moz">
// <scrollbar orient="horizontal">
// ...
// </div>
Text* text = firstChild->GetAsText();
nsIContent* firstChildExceptText =
text ? firstChild->GetNextSibling() : firstChild;
// If the DOM tree is unexpected, fall back to the expensive path.
bool isInput = IsSingleLineEditor();
bool isTextarea = !isInput;
if (NS_WARN_IF(isInput && firstChildExceptText) ||
NS_WARN_IF(isTextarea && !firstChildExceptText) ||
NS_WARN_IF(isTextarea &&
!TextEditUtils::IsMozBR(firstChildExceptText) &&
!firstChildExceptText->IsXULElement(nsGkAtoms::scrollbar))) {
return NS_OK;
}
// If there is no text node in the expected DOM tree, we can say that it's
// just empty.
if (!text) {
aOutString->Truncate();
*aHandled = true;
return NS_OK;
}
// Otherwise, the text is the value.
text->GetData(*aOutString);
*aHandled = true;
return NS_OK;
}
nsresult
TextEditRules::RemoveRedundantTrailingBR()
{
MOZ_ASSERT(IsEditorDataAvailable());
// If the bogus node exists, we have no work to do
if (mBogusNode) {
return NS_OK;
}
// Likewise, nothing to be done if we could never have inserted a trailing br
if (IsSingleLineEditor()) {
return NS_OK;
}
Element* rootElement = TextEditorRef().GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_NULL_POINTER;
}
uint32_t childCount = rootElement->GetChildCount();
if (childCount > 1) {
// The trailing br is redundant if it is the only remaining child node
return NS_OK;
}
RefPtr<nsIContent> child = rootElement->GetFirstChild();
if (!child || !child->IsElement()) {
return NS_OK;
}
RefPtr<Element> childElement = child->AsElement();
if (!TextEditUtils::IsMozBR(childElement)) {
return NS_OK;
}
// Rather than deleting this node from the DOM tree we should instead
// morph this br into the bogus node
childElement->UnsetAttr(kNameSpaceID_None, nsGkAtoms::type, true);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
// set mBogusNode to be this <br>
mBogusNode = childElement;
// give it the bogus node attribute
childElement->SetAttr(kNameSpaceID_None, kMOZEditorBogusNodeAttrAtom,
kMOZEditorBogusNodeValue, false);
return NS_OK;
}
nsresult
TextEditRules::CreateTrailingBRIfNeeded()
{
MOZ_ASSERT(IsEditorDataAvailable());
// but only if we aren't a single line edit field
if (IsSingleLineEditor()) {
return NS_OK;
}
Element* rootElement = TextEditorRef().GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIContent> lastChild = rootElement->GetLastChild();
// assuming CreateBogusNodeIfNeeded() has been called first
if (NS_WARN_IF(!lastChild)) {
return NS_ERROR_FAILURE;
}
if (!lastChild->IsHTMLElement(nsGkAtoms::br)) {
AutoTransactionsConserveSelection dontChangeMySelection(TextEditorRef());
EditorRawDOMPoint endOfRoot;
endOfRoot.SetToEndOf(rootElement);
CreateElementResult createMozBrResult = CreateMozBR(endOfRoot);
if (NS_WARN_IF(createMozBrResult.Failed())) {
return createMozBrResult.Rv();
}
return NS_OK;
}
// Check to see if the trailing BR is a former bogus node - this will have
// stuck around if we previously morphed a trailing node into a bogus node.
if (!TextEditorRef().IsMozEditorBogusNode(lastChild)) {
return NS_OK;
}
// Morph it back to a mozBR
lastChild->AsElement()->UnsetAttr(kNameSpaceID_None,
kMOZEditorBogusNodeAttrAtom,
false);
lastChild->AsElement()->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("_moz"),
true);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
return NS_OK;
}
nsresult
TextEditRules::CreateBogusNodeIfNeeded()
{
MOZ_ASSERT(IsEditorDataAvailable());
if (mBogusNode) {
// Let's not create more than one, ok?
return NS_OK;
}
// tell rules system to not do any post-processing
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
TextEditorRef(),
EditSubAction::eCreateBogusNode,
nsIEditor::eNone);
RefPtr<Element> rootElement = TextEditorRef().GetRoot();
if (!rootElement) {
// We don't even have a body yet, don't insert any bogus nodes at
// this point.
return NS_OK;
}
// Now we've got the body element. Iterate over the body element's children,
// looking for editable content. If no editable content is found, insert the
// bogus node.
bool isRootEditable = TextEditorRef().IsEditable(rootElement);
for (nsIContent* rootChild = rootElement->GetFirstChild();
rootChild;
rootChild = rootChild->GetNextSibling()) {
if (TextEditorRef().IsMozEditorBogusNode(rootChild) ||
!isRootEditable ||
TextEditorRef().IsEditable(rootChild) ||
TextEditorRef().IsBlockNode(rootChild)) {
return NS_OK;
}
}
// Skip adding the bogus node if body is read-only.
if (!TextEditorRef().IsModifiableNode(*rootElement)) {
return NS_OK;
}
// Create a br.
RefPtr<Element> newBrElement =
TextEditorRef().CreateHTMLContent(nsGkAtoms::br);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(!newBrElement)) {
return NS_ERROR_FAILURE;
}
// set mBogusNode to be the newly created <br>
mBogusNode = newBrElement;
// Give it a special attribute.
newBrElement->SetAttr(kNameSpaceID_None, kMOZEditorBogusNodeAttrAtom,
kMOZEditorBogusNodeValue, false);
// Put the node in the document.
nsresult rv =
TextEditorRef().InsertNodeWithTransaction(
*mBogusNode, EditorRawDOMPoint(rootElement, 0));
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Set selection.
IgnoredErrorResult error;
SelectionRefPtr()->Collapse(EditorRawDOMPoint(rootElement, 0), error);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(!error.Failed(),
"Failed to collapse selection at start of the root element");
return NS_OK;
}
nsresult
TextEditRules::TruncateInsertionIfNeeded(const nsAString* aInString,
nsAString* aOutString,
int32_t aMaxLength,
bool* aTruncated)
{
MOZ_ASSERT(IsEditorDataAvailable());
if (NS_WARN_IF(!aInString) || NS_WARN_IF(!aOutString)) {
return NS_ERROR_INVALID_ARG;
}
if (!aOutString->Assign(*aInString, mozilla::fallible)) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (aTruncated) {
*aTruncated = false;
}
if (-1 != aMaxLength && IsPlaintextEditor() &&
!TextEditorRef().IsIMEComposing()) {
// Get the current text length.
// Get the length of inString.
// Get the length of the selection.
// If selection is collapsed, it is length 0.
// Subtract the length of the selection from the len(doc)
// since we'll delete the selection on insert.
// This is resultingDocLength.
// Get old length of IME composing string
// which will be replaced by new one.
// If (resultingDocLength) is at or over max, cancel the insert
// If (resultingDocLength) + (length of input) > max,
// set aOutString to subset of inString so length = max
int32_t docLength;
nsresult rv = TextEditorRef().GetTextLength(&docLength);
if (NS_FAILED(rv)) {
return rv;
}
uint32_t start, end;
nsContentUtils::GetSelectionInTextControl(SelectionRefPtr(),
TextEditorRef().GetRoot(),
start, end);
TextComposition* composition = TextEditorRef().GetComposition();
uint32_t oldCompStrLength = composition ? composition->String().Length() : 0;
const uint32_t selectionLength = end - start;
const int32_t resultingDocLength = docLength - selectionLength - oldCompStrLength;
if (resultingDocLength >= aMaxLength) {
// This call is guaranteed to reduce the capacity of the string, so it
// cannot cause an OOM.
aOutString->Truncate();
if (aTruncated) {
*aTruncated = true;
}
} else {
int32_t oldLength = aOutString->Length();
if (oldLength + resultingDocLength > aMaxLength) {
int32_t newLength = aMaxLength - resultingDocLength;
MOZ_ASSERT(newLength > 0);
char16_t newLastChar = aOutString->CharAt(newLength - 1);
char16_t removingFirstChar = aOutString->CharAt(newLength);
// Don't separate the string between a surrogate pair.
if (NS_IS_HIGH_SURROGATE(newLastChar) &&
NS_IS_LOW_SURROGATE(removingFirstChar)) {
newLength--;
}
// XXX What should we do if we're removing IVS and its preceding
// character won't be removed?
// This call is guaranteed to reduce the capacity of the string, so it
// cannot cause an OOM.
aOutString->Truncate(newLength);
if (aTruncated) {
*aTruncated = true;
}
}
}
}
return NS_OK;
}
void
TextEditRules::ResetIMETextPWBuf()
{
mPasswordIMEText.Truncate();
}
void
TextEditRules::RemoveIMETextFromPWBuf(uint32_t& aStart,
nsAString* aIMEString)
{
MOZ_ASSERT(aIMEString);
// initialize PasswordIME
if (mPasswordIMEText.IsEmpty()) {
mPasswordIMEIndex = aStart;
} else {
// manage the password buffer
mPasswordText.Cut(mPasswordIMEIndex, mPasswordIMEText.Length());
aStart = mPasswordIMEIndex;
}
mPasswordIMEText.Assign(*aIMEString);
}
NS_IMETHODIMP
TextEditRules::Notify(nsITimer* aTimer)
{
MOZ_ASSERT(mTimer);
if (NS_WARN_IF(!mTextEditor)) {
return NS_ERROR_NOT_AVAILABLE;
}
// Check whether our text editor's password flag was changed before this
// "hide password character" timer actually fires.
if (!IsPasswordEditor()) {
return NS_OK;
}
RefPtr<TextEditor> textEditor(mTextEditor);
nsresult rv = textEditor->HideLastPasswordInput();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult
TextEditRules::HideLastPasswordInput()
{
MOZ_ASSERT(mTextEditor);
MOZ_ASSERT(IsPasswordEditor());
AutoSafeEditorData setData(*this, *mTextEditor);
nsresult rv = HideLastPasswordInputInternal();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
ASSERT_PASSWORD_LENGTHS_EQUAL();
mLastLength = 0;
return NS_OK;
}
NS_IMETHODIMP
TextEditRules::GetName(nsACString& aName)
{
aName.AssignLiteral("TextEditRules");
return NS_OK;
}
nsresult
TextEditRules::HideLastPasswordInputInternal()
{
MOZ_ASSERT(IsEditorDataAvailable());
if (!mLastLength) {
// Special case, we're trying to replace a range that no longer exists
return NS_OK;
}
nsAutoString hiddenText;
FillBufWithPWChars(&hiddenText, mLastLength);
uint32_t start, end;
nsContentUtils::GetSelectionInTextControl(SelectionRefPtr(),
TextEditorRef().GetRoot(),
start, end);
nsCOMPtr<nsINode> selNode = GetTextNodeAroundSelectionStartContainer();
if (NS_WARN_IF(!selNode)) {
return NS_OK;
}
selNode->GetAsText()->ReplaceData(mLastStart, mLastLength, hiddenText,
IgnoreErrors());
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
// XXXbz Selection::Collapse/Extend take int32_t, but there are tons of
// callsites... Converting all that is a battle for another day.
DebugOnly<nsresult> rv = SelectionRefPtr()->Collapse(selNode, start);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to collapse selection");
if (start != end) {
rv = SelectionRefPtr()->Extend(selNode, end);
if (NS_WARN_IF(!CanHandleEditAction())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to extend selection");
}
return NS_OK;
}
// static
void
TextEditRules::FillBufWithPWChars(nsAString* aOutString,
int32_t aLength)
{
MOZ_ASSERT(aOutString);
// change the output to the platform password character
char16_t passwordChar = LookAndFeel::GetPasswordCharacter();
aOutString->Truncate();
for (int32_t i = 0; i < aLength; i++) {
aOutString->Append(passwordChar);
}
}
template<typename PT, typename CT>
CreateElementResult
TextEditRules::CreateBRInternal(
const EditorDOMPointBase<PT, CT>& aPointToInsert,
bool aCreateMozBR)
{
MOZ_ASSERT(IsEditorDataAvailable());
if (NS_WARN_IF(!aPointToInsert.IsSet())) {
return CreateElementResult(NS_ERROR_FAILURE);
}
RefPtr<Element> brElement =
TextEditorRef().InsertBrElementWithTransaction(aPointToInsert);
if (NS_WARN_IF(!CanHandleEditAction())) {
return CreateElementResult(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_WARN_IF(!brElement)) {
return CreateElementResult(NS_ERROR_FAILURE);
}
// give it special moz attr
if (!aCreateMozBR) {
return CreateElementResult(brElement.forget());
}
// XXX Why do we need to set this attribute with transaction?
nsresult rv =
TextEditorRef().SetAttributeWithTransaction(*brElement, *nsGkAtoms::type,
NS_LITERAL_STRING("_moz"));
// XXX Don't we need to remove the new <br> element from the DOM tree
// in these case?
if (NS_WARN_IF(!CanHandleEditAction())) {
return CreateElementResult(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return CreateElementResult(NS_ERROR_FAILURE);
}
return CreateElementResult(brElement.forget());
}
bool
TextEditRules::IsPasswordEditor() const
{
return mTextEditor ? mTextEditor->IsPasswordEditor() : false;
}
bool
TextEditRules::IsSingleLineEditor() const
{
return mTextEditor ? mTextEditor->IsSingleLineEditor() : false;
}
bool
TextEditRules::IsPlaintextEditor() const
{
return mTextEditor ? mTextEditor->IsPlaintextEditor() : false;
}
bool
TextEditRules::IsReadonly() const
{
return mTextEditor ? mTextEditor->IsReadonly() : false;
}
bool
TextEditRules::IsDisabled() const
{
return mTextEditor ? mTextEditor->IsDisabled() : false;
}
bool
TextEditRules::IsMailEditor() const
{
return mTextEditor ? mTextEditor->IsMailEditor() : false;
}
bool
TextEditRules::DontEchoPassword() const
{
return mTextEditor ? mTextEditor->DontEchoPassword() : false;
}
} // namespace mozilla
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