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pjs/editor/libeditor/text/nsTextEditRules.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsTextEditRules.h"
#include "nsEditor.h"
#include "nsTextEditUtils.h"
#include "nsCRT.h"
#include "nsCOMPtr.h"
#include "nsIServiceManager.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsIDOMText.h"
#include "nsIDOMNodeList.h"
#include "nsISelection.h"
#include "nsISelectionPrivate.h"
#include "nsISelectionController.h"
#include "nsIDOMRange.h"
#include "nsIDOMNSRange.h"
#include "nsIDOMCharacterData.h"
#include "nsIContent.h"
#include "nsIContentIterator.h"
#include "nsEditorUtils.h"
#include "EditTxn.h"
#include "nsEditProperty.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsUnicharUtils.h"
#include "nsILookAndFeel.h"
#include "nsWidgetsCID.h"
#include "DeleteTextTxn.h"
#include "nsNodeIterator.h"
#include "nsIDOMNodeFilter.h"
// for IBMBIDI
#include "nsFrameSelection.h"
static NS_DEFINE_CID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
#define CANCEL_OPERATION_IF_READONLY_OR_DISABLED \
if (IsReadonly() || IsDisabled()) \
{ \
*aCancel = PR_TRUE; \
return NS_OK; \
};
nsresult
NS_NewTextEditRules(nsIEditRules** aInstancePtrResult)
{
nsTextEditRules * rules = new nsTextEditRules();
if (rules)
return rules->QueryInterface(NS_GET_IID(nsIEditRules), (void**) aInstancePtrResult);
return NS_ERROR_OUT_OF_MEMORY;
}
/********************************************************
* Constructor/Destructor
********************************************************/
nsTextEditRules::nsTextEditRules()
: mEditor(nsnull)
, mPasswordText()
, mPasswordIMEText()
, mPasswordIMEIndex(0)
, mActionNesting(0)
, mLockRulesSniffing(PR_FALSE)
, mDidExplicitlySetInterline(PR_FALSE)
, mTheAction(0)
, mLastStart(0)
, mLastLength(0)
{
}
nsTextEditRules::~nsTextEditRules()
{
// do NOT delete mEditor here. We do not hold a ref count to mEditor. mEditor owns our lifespan.
if (mTimer)
mTimer->Cancel();
}
/********************************************************
* XPCOM Cruft
********************************************************/
NS_IMPL_CYCLE_COLLECTION_2(nsTextEditRules, mBogusNode, mCachedSelectionNode)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsTextEditRules)
NS_INTERFACE_MAP_ENTRY(nsIEditRules)
NS_INTERFACE_MAP_ENTRY(nsITimerCallback)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIEditRules)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsTextEditRules)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsTextEditRules)
/********************************************************
* Public methods
********************************************************/
NS_IMETHODIMP
nsTextEditRules::Init(nsPlaintextEditor *aEditor)
{
if (!aEditor) { return NS_ERROR_NULL_POINTER; }
mEditor = aEditor; // we hold a non-refcounted reference back to our editor
nsCOMPtr<nsISelection> selection;
mEditor->GetSelection(getter_AddRefs(selection));
NS_ASSERTION(selection, "editor cannot get selection");
// Cache our body node, if available.
nsIDOMNode *body = mEditor->GetRoot();
// Put in a magic br if needed. This method handles null selection,
// which should never happen anyway
nsresult res = CreateBogusNodeIfNeeded(selection);
if (NS_FAILED(res)) return res;
// If the selection hasn't been set up yet, set it up collapsed to the end of
// our editable content.
PRInt32 rangeCount;
res = selection->GetRangeCount(&rangeCount);
NS_ENSURE_SUCCESS(res, res);
if (!rangeCount) {
res = mEditor->EndOfDocument();
NS_ENSURE_SUCCESS(res, res);
}
if (IsPlaintextEditor())
{
// ensure trailing br node
res = CreateTrailingBRIfNeeded();
if (NS_FAILED(res)) return res;
}
if (body)
{
// create a range that is the entire body contents
nsCOMPtr<nsIDOMRange> wholeDoc =
do_CreateInstance("@mozilla.org/content/range;1");
if (!wholeDoc) return NS_ERROR_NULL_POINTER;
wholeDoc->SetStart(body,0);
nsCOMPtr<nsIDOMNodeList> list;
res = body->GetChildNodes(getter_AddRefs(list));
if (NS_FAILED(res)) return res;
if (!list) return NS_ERROR_FAILURE;
PRUint32 listCount;
res = list->GetLength(&listCount);
if (NS_FAILED(res)) return res;
res = wholeDoc->SetEnd(body, listCount);
if (NS_FAILED(res)) return res;
// replace newlines in that range with breaks
res = ReplaceNewlines(wholeDoc);
}
PRBool deleteBidiImmediately = PR_FALSE;
nsCOMPtr<nsIPrefBranch> prefBranch =
do_GetService(NS_PREFSERVICE_CONTRACTID, &res);
if (NS_SUCCEEDED(res))
prefBranch->GetBoolPref("bidi.edit.delete_immediately",
&deleteBidiImmediately);
mDeleteBidiImmediately = deleteBidiImmediately;
return res;
}
NS_IMETHODIMP
nsTextEditRules::DetachEditor()
{
if (mTimer)
mTimer->Cancel();
mEditor = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsTextEditRules::BeforeEdit(PRInt32 action, nsIEditor::EDirection aDirection)
{
if (mLockRulesSniffing) return NS_OK;
nsAutoLockRulesSniffing lockIt(this);
mDidExplicitlySetInterline = PR_FALSE;
// get the selection and cache the position before editing
nsCOMPtr<nsISelection> selection;
nsresult res = mEditor->GetSelection(getter_AddRefs(selection));
if (NS_FAILED(res))
return res;
selection->GetAnchorNode(getter_AddRefs(mCachedSelectionNode));
selection->GetAnchorOffset(&mCachedSelectionOffset);
if (!mActionNesting)
{
// let rules remember the top level action
mTheAction = action;
}
mActionNesting++;
return NS_OK;
}
NS_IMETHODIMP
nsTextEditRules::AfterEdit(PRInt32 action, nsIEditor::EDirection aDirection)
{
if (mLockRulesSniffing) return NS_OK;
nsAutoLockRulesSniffing lockIt(this);
NS_PRECONDITION(mActionNesting>0, "bad action nesting!");
nsresult res = NS_OK;
if (!--mActionNesting)
{
nsCOMPtr<nsISelection>selection;
res = mEditor->GetSelection(getter_AddRefs(selection));
if (NS_FAILED(res)) return res;
res = mEditor->HandleInlineSpellCheck(action, selection,
mCachedSelectionNode, mCachedSelectionOffset,
nsnull, 0, nsnull, 0);
if (NS_FAILED(res))
return res;
// detect empty doc
res = CreateBogusNodeIfNeeded(selection);
if (NS_FAILED(res))
return res;
// insure trailing br node
res = CreateTrailingBRIfNeeded();
if (NS_FAILED(res))
return res;
/* After inserting text the cursor Bidi level must be set to the level of the inserted text.
* This is difficult, because we cannot know what the level is until after the Bidi algorithm
* is applied to the whole paragraph.
*
* So we set the cursor Bidi level to UNDEFINED here, and the caret code will set it correctly later
*/
if (action == nsEditor::kOpInsertText
|| action == nsEditor::kOpInsertIMEText) {
nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryInterface(selection));
nsCOMPtr<nsFrameSelection> frameSelection;
privateSelection->GetFrameSelection(getter_AddRefs(frameSelection));
if (frameSelection) {
frameSelection->UndefineCaretBidiLevel();
}
}
}
return res;
}
NS_IMETHODIMP
nsTextEditRules::WillDoAction(nsISelection *aSelection,
nsRulesInfo *aInfo,
PRBool *aCancel,
PRBool *aHandled)
{
// null selection is legal
if (!aInfo || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
#if defined(DEBUG_ftang)
printf("nsTextEditRules::WillDoAction action= %d", aInfo->action);
#endif
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
// my kingdom for dynamic cast
nsTextRulesInfo *info = static_cast<nsTextRulesInfo*>(aInfo);
switch (info->action)
{
case kInsertBreak:
return WillInsertBreak(aSelection, aCancel, aHandled);
case kInsertText:
case kInsertTextIME:
return WillInsertText(info->action,
aSelection,
aCancel,
aHandled,
info->inString,
info->outString,
info->maxLength);
case kDeleteSelection:
return WillDeleteSelection(aSelection, info->collapsedAction, aCancel, aHandled);
case kUndo:
return WillUndo(aSelection, aCancel, aHandled);
case kRedo:
return WillRedo(aSelection, aCancel, aHandled);
case kSetTextProperty:
return WillSetTextProperty(aSelection, aCancel, aHandled);
case kRemoveTextProperty:
return WillRemoveTextProperty(aSelection, aCancel, aHandled);
case kOutputText:
return WillOutputText(aSelection,
info->outputFormat,
info->outString,
aCancel,
aHandled);
case kInsertElement: // 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(aSelection, aCancel);
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsTextEditRules::DidDoAction(nsISelection *aSelection,
nsRulesInfo *aInfo, nsresult aResult)
{
// 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.
nsAutoTxnsConserveSelection dontSpazMySelection(mEditor);
if (!aSelection || !aInfo)
return NS_ERROR_NULL_POINTER;
// my kingdom for dynamic cast
nsTextRulesInfo *info = static_cast<nsTextRulesInfo*>(aInfo);
switch (info->action)
{
case kInsertBreak:
return DidInsertBreak(aSelection, aResult);
case kInsertText:
case kInsertTextIME:
return DidInsertText(aSelection, aResult);
case kDeleteSelection:
return DidDeleteSelection(aSelection, info->collapsedAction, aResult);
case kUndo:
return DidUndo(aSelection, aResult);
case kRedo:
return DidRedo(aSelection, aResult);
case kSetTextProperty:
return DidSetTextProperty(aSelection, aResult);
case kRemoveTextProperty:
return DidRemoveTextProperty(aSelection, aResult);
case kOutputText:
return DidOutputText(aSelection, aResult);
}
// Don't fail on transactions we don't handle here!
return NS_OK;
}
NS_IMETHODIMP
nsTextEditRules::DocumentIsEmpty(PRBool *aDocumentIsEmpty)
{
if (!aDocumentIsEmpty)
return NS_ERROR_NULL_POINTER;
*aDocumentIsEmpty = (mBogusNode != nsnull);
return NS_OK;
}
/********************************************************
* Protected methods
********************************************************/
nsresult
nsTextEditRules::WillInsert(nsISelection *aSelection, PRBool *aCancel)
{
if (!aSelection || !aCancel)
return NS_ERROR_NULL_POINTER;
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
// check for the magic content node and delete it if it exists
if (mBogusNode)
{
mEditor->DeleteNode(mBogusNode);
mBogusNode = nsnull;
}
return NS_OK;
}
nsresult
nsTextEditRules::DidInsert(nsISelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillInsertBreak(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
*aHandled = PR_FALSE;
if (IsSingleLineEditor()) {
*aCancel = PR_TRUE;
}
else
{
*aCancel = PR_FALSE;
// if the selection isn't collapsed, delete it.
PRBool bCollapsed;
nsresult res = aSelection->GetIsCollapsed(&bCollapsed);
if (NS_FAILED(res)) return res;
if (!bCollapsed)
{
res = mEditor->DeleteSelection(nsIEditor::eNone);
if (NS_FAILED(res)) return res;
}
res = WillInsert(aSelection, aCancel);
if (NS_FAILED(res)) return res;
// initialize out param
// we want to ignore result of WillInsert()
*aCancel = PR_FALSE;
}
return NS_OK;
}
nsresult
nsTextEditRules::DidInsertBreak(nsISelection *aSelection, nsresult aResult)
{
// 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 we are at the end of the document, we need to insert
// a special mozBR following the normal br, and then set the
// selection to stick to the mozBR.
PRInt32 selOffset;
nsCOMPtr<nsIDOMNode> selNode;
nsresult res;
res = mEditor->GetStartNodeAndOffset(aSelection, address_of(selNode), &selOffset);
if (NS_FAILED(res)) return res;
// confirm we are at end of document
if (selOffset == 0) return NS_OK; // can't be after a br if we are at offset 0
nsIDOMElement *rootElem = mEditor->GetRoot();
nsCOMPtr<nsIDOMNode> root = do_QueryInterface(rootElem);
if (!root) return NS_ERROR_NULL_POINTER;
if (selNode != root) return NS_OK; // must be inside text node or somewhere other than end of root
nsCOMPtr<nsIDOMNode> temp = mEditor->GetChildAt(selNode, selOffset);
if (temp) return NS_OK; // can't be at end if there is a node after us.
nsCOMPtr<nsIDOMNode> nearNode = mEditor->GetChildAt(selNode, selOffset-1);
if (nearNode && nsTextEditUtils::IsBreak(nearNode) && !nsTextEditUtils::IsMozBR(nearNode))
{
nsCOMPtr<nsISelectionPrivate>selPrivate(do_QueryInterface(aSelection));
// need to insert special moz BR. Why? Because if we don't
// the user will see no new line for the break. Also, things
// like table cells won't grow in height.
nsCOMPtr<nsIDOMNode> brNode;
res = CreateMozBR(selNode, selOffset, address_of(brNode));
if (NS_FAILED(res)) return res;
res = nsEditor::GetNodeLocation(brNode, address_of(selNode), &selOffset);
if (NS_FAILED(res)) return res;
selPrivate->SetInterlinePosition(PR_TRUE);
res = aSelection->Collapse(selNode, selOffset);
if (NS_FAILED(res)) return res;
}
return res;
}
static inline already_AddRefed<nsIDOMNode>
GetTextNode(nsISelection *selection, nsEditor *editor) {
PRInt32 selOffset;
nsCOMPtr<nsIDOMNode> selNode;
nsresult res = editor->GetStartNodeAndOffset(selection, address_of(selNode), &selOffset);
if (NS_FAILED(res)) return nsnull;
if (!editor->IsTextNode(selNode)) {
// Get an nsINode from the nsIDOMNode
nsCOMPtr<nsINode> node = do_QueryInterface(selNode);
// if node is null, return it to indicate there's no text
if (!node) return nsnull;
// This should be the root node, walk the tree looking for text nodes
nsNodeIterator iter(node, nsIDOMNodeFilter::SHOW_TEXT, nsnull, PR_TRUE);
while (!editor->IsTextNode(selNode)) {
if (NS_FAILED(res = iter.NextNode(getter_AddRefs(selNode))) || !selNode) {
return nsnull;
}
}
}
return selNode.forget();
}
#ifdef DEBUG
#define ASSERT_PASSWORD_LENGTHS_EQUAL() \
if (IsPasswordEditor()) { \
PRInt32 txtLen; \
mEditor->GetTextLength(&txtLen); \
NS_ASSERTION(mPasswordText.Length() == txtLen, \
"password length not equal to number of asterisks"); \
}
#else
#define ASSERT_PASSWORD_LENGTHS_EQUAL()
#endif
// static
void
nsTextEditRules::HandleNewLines(nsString &aString,
PRInt32 aNewlineHandling)
{
if (aNewlineHandling < 0) {
PRInt32 caretStyle;
nsPlaintextEditor::GetDefaultEditorPrefs(aNewlineHandling, caretStyle);
}
switch(aNewlineHandling)
{
case nsIPlaintextEditor::eNewlinesReplaceWithSpaces:
// Strip trailing newlines first so we don't wind up with trailing spaces
aString.Trim(CRLF, PR_FALSE, PR_TRUE);
aString.ReplaceChar(CRLF, ' ');
break;
case nsIPlaintextEditor::eNewlinesStrip:
aString.StripChars(CRLF);
break;
case nsIPlaintextEditor::eNewlinesPasteToFirst:
default:
{
PRInt32 firstCRLF = aString.FindCharInSet(CRLF);
// we get first *non-empty* line.
PRInt32 offset = 0;
while (firstCRLF == offset)
{
offset++;
firstCRLF = aString.FindCharInSet(CRLF, offset);
}
if (firstCRLF > 0)
aString.Truncate(firstCRLF);
if (offset > 0)
aString.Cut(0, offset);
}
break;
case nsIPlaintextEditor::eNewlinesReplaceWithCommas:
aString.Trim(CRLF, PR_TRUE, PR_TRUE);
aString.ReplaceChar(CRLF, ',');
break;
case nsIPlaintextEditor::eNewlinesStripSurroundingWhitespace:
{
// find each newline, and strip all the whitespace before
// and after it
PRInt32 firstCRLF = aString.FindCharInSet(CRLF);
while (firstCRLF >= 0)
{
PRUint32 wsBegin = firstCRLF, wsEnd = firstCRLF + 1;
// look backwards for the first non-whitespace char
while (wsBegin > 0 && NS_IS_SPACE(aString[wsBegin - 1]))
--wsBegin;
while (wsEnd < aString.Length() && NS_IS_SPACE(aString[wsEnd]))
++wsEnd;
// now cut this range out of the string
aString.Cut(wsBegin, wsEnd - wsBegin);
// look for another CR or LF
firstCRLF = aString.FindCharInSet(CRLF);
}
}
break;
case nsIPlaintextEditor::eNewlinesPasteIntact:
// even if we're pasting newlines, don't paste leading/trailing ones
aString.Trim(CRLF, PR_TRUE, PR_TRUE);
break;
}
}
nsresult
nsTextEditRules::WillInsertText(PRInt32 aAction,
nsISelection *aSelection,
PRBool *aCancel,
PRBool *aHandled,
const nsAString *inString,
nsAString *outString,
PRInt32 aMaxLength)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
if (inString->IsEmpty() && (aAction != kInsertTextIME))
{
// 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 = PR_TRUE;
*aHandled = PR_FALSE;
return NS_OK;
}
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_TRUE;
// handle docs with a max length
// NOTE, this function copies inString into outString for us.
nsresult res = TruncateInsertionIfNeeded(aSelection, inString, outString, aMaxLength);
if (NS_FAILED(res)) return res;
PRUint32 start = 0;
PRUint32 end = 0;
// handle password field docs
if (IsPasswordEditor())
{
res = mEditor->GetTextSelectionOffsets(aSelection, start, end);
NS_ASSERTION((NS_SUCCEEDED(res)), "getTextSelectionOffsets failed!");
if (NS_FAILED(res)) return res;
}
// if the selection isn't collapsed, delete it.
PRBool bCollapsed;
res = aSelection->GetIsCollapsed(&bCollapsed);
if (NS_FAILED(res)) return res;
if (!bCollapsed)
{
res = mEditor->DeleteSelection(nsIEditor::eNone);
if (NS_FAILED(res)) return res;
}
res = WillInsert(aSelection, aCancel);
if (NS_FAILED(res)) return res;
// initialize out param
// we want to ignore result of WillInsert()
*aCancel = PR_FALSE;
// handle password field data
// this has the side effect of changing all the characters in aOutString
// to the replacement character
if (IsPasswordEditor())
{
if (aAction == kInsertTextIME) {
res = RemoveIMETextFromPWBuf(start, outString);
if (NS_FAILED(res)) return res;
}
}
// 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);
HandleNewLines(tString, mEditor->mNewlineHandling);
outString->Assign(tString);
}
if (IsPasswordEditor())
{
// manage the password buffer
mPasswordText.Insert(*outString, start);
nsCOMPtr<nsILookAndFeel> lookAndFeel = do_GetService(kLookAndFeelCID);
if (lookAndFeel->GetEchoPassword() && !DontEchoPassword()) {
HideLastPWInput();
mLastStart = start;
mLastLength = outString->Length();
if (mTimer)
{
mTimer->Cancel();
}
else
{
mTimer = do_CreateInstance("@mozilla.org/timer;1", &res);
if (NS_FAILED(res)) return res;
}
mTimer->InitWithCallback(this, 600, nsITimer::TYPE_ONE_SHOT);
}
else
{
res = FillBufWithPWChars(outString, outString->Length());
if (NS_FAILED(res)) return res;
}
}
// get the (collapsed) selection location
nsCOMPtr<nsIDOMNode> selNode;
PRInt32 selOffset;
res = mEditor->GetStartNodeAndOffset(aSelection, address_of(selNode), &selOffset);
if (NS_FAILED(res)) return res;
// don't put text in places that can't have it
if (!mEditor->IsTextNode(selNode) && !mEditor->CanContainTag(selNode, NS_LITERAL_STRING("#text")))
return NS_ERROR_FAILURE;
// we need to get the doc
nsCOMPtr<nsIDOMDocument>doc;
res = mEditor->GetDocument(getter_AddRefs(doc));
if (NS_FAILED(res)) return res;
if (!doc) return NS_ERROR_NULL_POINTER;
if (aAction == kInsertTextIME)
{
res = mEditor->InsertTextImpl(*outString, address_of(selNode), &selOffset, doc);
if (NS_FAILED(res)) return res;
}
else // aAction == kInsertText
{
// find where we are
nsCOMPtr<nsIDOMNode> curNode = selNode;
PRInt32 curOffset = selOffset;
// is our text going to be PREformatted?
// We remember this so that we know how to handle tabs.
PRBool isPRE;
res = mEditor->IsPreformatted(selNode, &isPRE);
if (NS_FAILED(res)) return res;
// don't spaz my selection in subtransactions
nsAutoTxnsConserveSelection dontSpazMySelection(mEditor);
nsString tString(*outString);
const PRUnichar *unicodeBuf = tString.get();
nsCOMPtr<nsIDOMNode> unused;
PRInt32 pos = 0;
// for efficiency, break out the pre case separately. This is because
// it's a lot cheaper to search the input string for only newlines than
// it is to search for both tabs and newlines.
if (isPRE)
{
while (unicodeBuf && (pos != -1) && ((PRUint32)pos < tString.Length()))
{
PRInt32 oldPos = pos;
PRInt32 subStrLen;
pos = tString.FindChar(nsCRT::LF, oldPos);
if (pos != -1)
{
subStrLen = pos - oldPos;
// if first char is newline, then use just it
if (subStrLen == 0)
subStrLen = 1;
}
else
{
subStrLen = tString.Length() - oldPos;
pos = tString.Length();
}
nsDependentSubstring subStr(tString, oldPos, subStrLen);
// is it a return?
if (subStr.EqualsLiteral(LFSTR))
{
if (IsSingleLineEditor())
{
NS_ASSERTION((mEditor->mNewlineHandling == nsIPlaintextEditor::eNewlinesPasteIntact),
"Newline improperly getting into single-line edit field!");
res = mEditor->InsertTextImpl(subStr, address_of(curNode), &curOffset, doc);
}
else
{
res = mEditor->CreateBRImpl(address_of(curNode), &curOffset, address_of(unused), nsIEditor::eNone);
// If the newline is the last character in the string, and the BR we
// just inserted is the last node in the content tree, we need to add
// a mozBR so that a blank line is created.
if (NS_SUCCEEDED(res) && curNode && pos == (PRInt32)(tString.Length() - 1))
{
nsCOMPtr<nsIDOMNode> nextChild = mEditor->GetChildAt(curNode, curOffset);
if (!nextChild)
{
// We must be at the end since there isn't a nextChild.
//
// curNode and curOffset should be set to the position after
// the BR we added above, so just create a mozBR at that position.
//
// Note that we don't update curOffset after we've created/inserted
// the mozBR since we never want the selection to be placed after it.
res = CreateMozBR(curNode, curOffset, address_of(unused));
}
}
}
pos++;
}
else
{
res = mEditor->InsertTextImpl(subStr, address_of(curNode), &curOffset, doc);
}
if (NS_FAILED(res)) return res;
}
}
else
{
char specialChars[] = {TAB, nsCRT::LF, 0};
while (unicodeBuf && (pos != -1) && ((PRUint32)pos < tString.Length()))
{
PRInt32 oldPos = pos;
PRInt32 subStrLen;
pos = tString.FindCharInSet(specialChars, oldPos);
if (pos != -1)
{
subStrLen = pos - oldPos;
// if first char is newline, then use just it
if (subStrLen == 0)
subStrLen = 1;
}
else
{
subStrLen = tString.Length() - oldPos;
pos = tString.Length();
}
nsDependentSubstring subStr(tString, oldPos, subStrLen);
// is it a tab?
if (subStr.EqualsLiteral("\t"))
{
res = mEditor->InsertTextImpl(NS_LITERAL_STRING(" "), address_of(curNode), &curOffset, doc);
pos++;
}
// is it a return?
else if (subStr.EqualsLiteral(LFSTR))
{
res = mEditor->CreateBRImpl(address_of(curNode), &curOffset, address_of(unused), nsIEditor::eNone);
pos++;
}
else
{
res = mEditor->InsertTextImpl(subStr, address_of(curNode), &curOffset, doc);
}
if (NS_FAILED(res)) return res;
}
}
outString->Assign(tString);
if (curNode)
{
aSelection->Collapse(curNode, curOffset);
// 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.
PRBool endsWithLF = !tString.IsEmpty() && tString.get()[tString.Length() - 1] == nsCRT::LF;
nsCOMPtr<nsISelectionPrivate>selPrivate(do_QueryInterface(aSelection));
selPrivate->SetInterlinePosition(endsWithLF);
}
}
ASSERT_PASSWORD_LENGTHS_EQUAL()
return res;
}
nsresult
nsTextEditRules::DidInsertText(nsISelection *aSelection,
nsresult aResult)
{
return DidInsert(aSelection, aResult);
}
nsresult
nsTextEditRules::WillSetTextProperty(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled)
{ return NS_ERROR_NULL_POINTER; }
// XXX: should probably return a success value other than NS_OK that means "not allowed"
if (IsPlaintextEditor()) {
*aCancel = PR_TRUE;
}
return NS_OK;
}
nsresult
nsTextEditRules::DidSetTextProperty(nsISelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillRemoveTextProperty(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled)
{ return NS_ERROR_NULL_POINTER; }
// XXX: should probably return a success value other than NS_OK that means "not allowed"
if (IsPlaintextEditor()) {
*aCancel = PR_TRUE;
}
return NS_OK;
}
nsresult
nsTextEditRules::DidRemoveTextProperty(nsISelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillDeleteSelection(nsISelection *aSelection,
nsIEditor::EDirection aCollapsedAction,
PRBool *aCancel,
PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
// if there is only bogus content, cancel the operation
if (mBogusNode) {
*aCancel = PR_TRUE;
return NS_OK;
}
nsresult res = NS_OK;
if (IsPasswordEditor())
{
res = mEditor->ExtendSelectionForDelete(aSelection, &aCollapsedAction);
NS_ENSURE_SUCCESS(res, res);
// manage the password buffer
PRUint32 start, end;
mEditor->GetTextSelectionOffsets(aSelection, start, end);
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr<nsILookAndFeel> lookAndFeel = do_GetService(kLookAndFeelCID);
if (lookAndFeel->GetEchoPassword()) {
HideLastPWInput();
mLastStart = start;
mLastLength = 0;
if (mTimer)
{
mTimer->Cancel();
}
}
if (end == start)
{ // collapsed selection
if (nsIEditor::ePrevious==aCollapsedAction && 0<start) { // del back
mPasswordText.Cut(start-1, 1);
}
else if (nsIEditor::eNext==aCollapsedAction) { // del forward
mPasswordText.Cut(start, 1);
}
// otherwise nothing to do for this collapsed selection
}
else { // extended selection
mPasswordText.Cut(start, end-start);
}
}
else
{
nsCOMPtr<nsIDOMNode> startNode;
PRInt32 startOffset;
res = mEditor->GetStartNodeAndOffset(aSelection, address_of(startNode), &startOffset);
if (NS_FAILED(res)) return res;
if (!startNode) return NS_ERROR_FAILURE;
PRBool bCollapsed;
res = aSelection->GetIsCollapsed(&bCollapsed);
if (NS_FAILED(res)) return res;
if (!bCollapsed) return NS_OK;
// Test for distance between caret and text that will be deleted
res = CheckBidiLevelForDeletion(aSelection, startNode, startOffset, aCollapsedAction, aCancel);
if (NS_FAILED(res)) return res;
if (*aCancel) return NS_OK;
res = mEditor->ExtendSelectionForDelete(aSelection, &aCollapsedAction);
NS_ENSURE_SUCCESS(res, res);
}
res = mEditor->DeleteSelectionImpl(aCollapsedAction);
NS_ENSURE_SUCCESS(res, res);
*aHandled = PR_TRUE;
ASSERT_PASSWORD_LENGTHS_EQUAL()
return NS_OK;
}
nsresult
nsTextEditRules::DidDeleteSelection(nsISelection *aSelection,
nsIEditor::EDirection aCollapsedAction,
nsresult aResult)
{
nsCOMPtr<nsIDOMNode> startNode;
PRInt32 startOffset;
nsresult res = mEditor->GetStartNodeAndOffset(aSelection, address_of(startNode), &startOffset);
if (NS_FAILED(res)) return res;
if (!startNode) return NS_ERROR_FAILURE;
// delete empty text nodes at selection
if (mEditor->IsTextNode(startNode))
{
nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(startNode);
PRUint32 strLength;
res = textNode->GetLength(&strLength);
if (NS_FAILED(res)) return res;
// are we in an empty text node?
if (!strLength)
{
res = mEditor->DeleteNode(startNode);
if (NS_FAILED(res)) return res;
}
}
if (!mDidExplicitlySetInterline)
{
// We prevent the caret from sticking on the left of prior BR
// (i.e. the end of previous line) after this deletion. Bug 92124
nsCOMPtr<nsISelectionPrivate> selPriv = do_QueryInterface(aSelection);
if (selPriv) res = selPriv->SetInterlinePosition(PR_TRUE);
}
return res;
}
nsresult
nsTextEditRules::WillUndo(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
return NS_OK;
}
/* 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.
*/
nsresult
nsTextEditRules:: DidUndo(nsISelection *aSelection, nsresult aResult)
{
nsresult res = aResult; // if aResult is an error, we return it.
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (NS_SUCCEEDED(res))
{
if (mBogusNode) {
mBogusNode = nsnull;
}
else
{
nsIDOMElement *theRoot = mEditor->GetRoot();
if (!theRoot) return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMNode> node = mEditor->GetLeftmostChild(theRoot);
if (node && mEditor->IsMozEditorBogusNode(node))
mBogusNode = node;
}
}
return res;
}
nsresult
nsTextEditRules::WillRedo(nsISelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
return NS_OK;
}
nsresult
nsTextEditRules::DidRedo(nsISelection *aSelection, nsresult aResult)
{
nsresult res = aResult; // if aResult is an error, we return it.
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (NS_SUCCEEDED(res))
{
if (mBogusNode) {
mBogusNode = nsnull;
}
else
{
nsIDOMElement *theRoot = mEditor->GetRoot();
if (!theRoot) return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMNodeList> nodeList;
res = theRoot->GetElementsByTagName(NS_LITERAL_STRING("br"),
getter_AddRefs(nodeList));
if (NS_FAILED(res)) return res;
if (nodeList)
{
PRUint32 len;
nodeList->GetLength(&len);
if (len != 1) return NS_OK; // only in the case of one br could there be the bogus node
nsCOMPtr<nsIDOMNode> node;
nodeList->Item(0, getter_AddRefs(node));
if (!node) return NS_ERROR_NULL_POINTER;
if (mEditor->IsMozEditorBogusNode(node))
mBogusNode = node;
}
}
}
return res;
}
nsresult
nsTextEditRules::WillOutputText(nsISelection *aSelection,
const nsAString *aOutputFormat,
nsAString *aOutString,
PRBool *aCancel,
PRBool *aHandled)
{
// null selection ok
if (!aOutString || !aOutputFormat || !aCancel || !aHandled)
{ return NS_ERROR_NULL_POINTER; }
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
nsAutoString outputFormat(*aOutputFormat);
ToLowerCase(outputFormat);
if (outputFormat.EqualsLiteral("text/plain"))
{ // only use these rules for plain text output
if (IsPasswordEditor())
{
*aOutString = mPasswordText;
*aHandled = PR_TRUE;
}
else if (mBogusNode)
{ // this means there's no content, so output null string
aOutString->Truncate();
*aHandled = PR_TRUE;
}
}
return NS_OK;
}
nsresult
nsTextEditRules::DidOutputText(nsISelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::ReplaceNewlines(nsIDOMRange *aRange)
{
if (!aRange) return NS_ERROR_NULL_POINTER;
// convert any newlines in editable, preformatted text nodes
// into normal breaks. this is because layout won't give us a place
// to put the cursor on empty lines otherwise.
nsresult res;
nsCOMPtr<nsIContentIterator> iter =
do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res);
if (NS_FAILED(res)) return res;
res = iter->Init(aRange);
if (NS_FAILED(res)) return res;
nsCOMArray<nsIDOMCharacterData> arrayOfNodes;
// gather up a list of editable preformatted text nodes
while (!iter->IsDone())
{
nsCOMPtr<nsIDOMNode> node = do_QueryInterface(iter->GetCurrentNode());
if (!node)
return NS_ERROR_FAILURE;
if (mEditor->IsTextNode(node) && mEditor->IsEditable(node))
{
PRBool isPRE;
res = mEditor->IsPreformatted(node, &isPRE);
if (NS_FAILED(res)) return res;
if (isPRE)
{
nsCOMPtr<nsIDOMCharacterData> data = do_QueryInterface(node);
arrayOfNodes.AppendObject(data);
}
}
iter->Next();
}
// replace newlines with breaks. have to do this left to right,
// since inserting the break can split the text node, and the
// original node becomes the righthand node.
PRInt32 j, nodeCount = arrayOfNodes.Count();
for (j = 0; j < nodeCount; j++)
{
nsCOMPtr<nsIDOMNode> brNode;
nsCOMPtr<nsIDOMCharacterData> textNode = arrayOfNodes[0];
arrayOfNodes.RemoveObjectAt(0);
// find the newline
PRInt32 offset;
nsAutoString tempString;
do
{
textNode->GetData(tempString);
offset = tempString.FindChar(nsCRT::LF);
if (offset == -1) break; // done with this node
// delete the newline
nsRefPtr<DeleteTextTxn> txn;
// note 1: we are not telling edit listeners about these because they don't care
// note 2: we are not wrapping these in a placeholder because we know they already are,
// or, failing that, undo is disabled
res = mEditor->CreateTxnForDeleteText(textNode, offset, 1,
getter_AddRefs(txn));
if (NS_FAILED(res)) return res;
if (!txn) return NS_ERROR_OUT_OF_MEMORY;
res = mEditor->DoTransaction(txn);
if (NS_FAILED(res)) return res;
// insert a break
res = mEditor->CreateBR(textNode, offset, address_of(brNode));
if (NS_FAILED(res)) return res;
} while (1); // break used to exit while loop
}
return res;
}
nsresult
nsTextEditRules::CreateTrailingBRIfNeeded()
{
// but only if we aren't a single line edit field
if (IsSingleLineEditor())
return NS_OK;
nsIDOMNode *body = mEditor->GetRoot();
if (!body)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMNode> lastChild;
nsresult res = body->GetLastChild(getter_AddRefs(lastChild));
// assuming CreateBogusNodeIfNeeded() has been called first
if (NS_FAILED(res)) return res;
if (!lastChild) return NS_ERROR_NULL_POINTER;
if (!nsTextEditUtils::IsBreak(lastChild))
{
nsAutoTxnsConserveSelection dontSpazMySelection(mEditor);
PRUint32 rootLen;
res = mEditor->GetLengthOfDOMNode(body, rootLen);
if (NS_FAILED(res)) return res;
nsCOMPtr<nsIDOMNode> unused;
res = CreateMozBR(body, rootLen, address_of(unused));
}
return res;
}
nsresult
nsTextEditRules::CreateBogusNodeIfNeeded(nsISelection *aSelection)
{
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (!mEditor) { return NS_ERROR_NULL_POINTER; }
if (mBogusNode) return NS_OK; // let's not create more than one, ok?
// tell rules system to not do any post-processing
nsAutoRules beginRulesSniffing(mEditor, nsEditor::kOpIgnore, nsIEditor::eNone);
nsIDOMNode* body = mEditor->GetRoot();
if (!body)
{
// 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 tag.
// iterate the body tag, looking for editable content
// if no editable content is found, insert the bogus node
PRBool needsBogusContent=PR_TRUE;
nsCOMPtr<nsIDOMNode> bodyChild;
nsresult res = body->GetFirstChild(getter_AddRefs(bodyChild));
while ((NS_SUCCEEDED(res)) && bodyChild)
{
if (mEditor->IsMozEditorBogusNode(bodyChild) ||
!mEditor->IsEditable(body) ||
mEditor->IsEditable(bodyChild))
{
needsBogusContent = PR_FALSE;
break;
}
nsCOMPtr<nsIDOMNode>temp;
bodyChild->GetNextSibling(getter_AddRefs(temp));
bodyChild = do_QueryInterface(temp);
}
if (needsBogusContent)
{
// create a br
nsCOMPtr<nsIContent> newContent;
res = mEditor->CreateHTMLContent(NS_LITERAL_STRING("br"), getter_AddRefs(newContent));
if (NS_FAILED(res)) return res;
nsCOMPtr<nsIDOMElement>brElement = do_QueryInterface(newContent);
// set mBogusNode to be the newly created <br>
mBogusNode = brElement;
if (!mBogusNode) return NS_ERROR_NULL_POINTER;
// give it a special attribute
newContent->SetAttr(kNameSpaceID_None, kMOZEditorBogusNodeAttrAtom,
kMOZEditorBogusNodeValue, PR_FALSE);
// put the node in the document
res = mEditor->InsertNode(mBogusNode, body, 0);
if (NS_FAILED(res)) return res;
// set selection
aSelection->Collapse(body, 0);
}
return res;
}
nsresult
nsTextEditRules::TruncateInsertionIfNeeded(nsISelection *aSelection,
const nsAString *aInString,
nsAString *aOutString,
PRInt32 aMaxLength)
{
if (!aSelection || !aInString || !aOutString) {return NS_ERROR_NULL_POINTER;}
nsresult res = NS_OK;
*aOutString = *aInString;
if ((-1 != aMaxLength) && IsPlaintextEditor() && !mEditor->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
PRInt32 docLength;
res = mEditor->GetTextLength(&docLength);
if (NS_FAILED(res)) { return res; }
PRUint32 start, end;
res = mEditor->GetTextSelectionOffsets(aSelection, start, end);
if (NS_FAILED(res)) { return res; }
PRInt32 oldCompStrLength;
res = mEditor->GetIMEBufferLength(&oldCompStrLength);
if (NS_FAILED(res)) { return res; }
const PRInt32 selectionLength = end - start;
const PRInt32 resultingDocLength = docLength - selectionLength - oldCompStrLength;
if (resultingDocLength >= aMaxLength)
{
aOutString->Truncate();
}
else
{
PRInt32 inCount = aOutString->Length();
if (inCount + resultingDocLength > aMaxLength)
{
aOutString->Truncate(aMaxLength - resultingDocLength);
}
}
}
return res;
}
nsresult
nsTextEditRules::ResetIMETextPWBuf()
{
mPasswordIMEText.Truncate();
return NS_OK;
}
nsresult
nsTextEditRules::RemoveIMETextFromPWBuf(PRUint32 &aStart, nsAString *aIMEString)
{
if (!aIMEString) {
return NS_ERROR_NULL_POINTER;
}
// initialize PasswordIME
if (mPasswordIMEText.IsEmpty()) {
mPasswordIMEIndex = aStart;
}
else {
// manage the password buffer
mPasswordText.Cut(mPasswordIMEIndex, mPasswordIMEText.Length());
aStart = mPasswordIMEIndex;
}
mPasswordIMEText.Assign(*aIMEString);
return NS_OK;
}
NS_IMETHODIMP nsTextEditRules::Notify(class nsITimer *) {
nsresult res = HideLastPWInput();
ASSERT_PASSWORD_LENGTHS_EQUAL();
mLastLength = 0;
return res;
}
nsresult nsTextEditRules::HideLastPWInput() {
if (!mLastLength) {
// Special case, we're trying to replace a range that no longer exists
return NS_OK;
}
nsAutoString hiddenText;
FillBufWithPWChars(&hiddenText, mLastLength);
nsCOMPtr<nsISelection> selection;
PRUint32 start, end;
nsresult res = mEditor->GetSelection(getter_AddRefs(selection));
if (NS_FAILED(res)) return res;
res = mEditor->GetTextSelectionOffsets(selection, start, end);
if (NS_FAILED(res)) return res;
nsCOMPtr<nsIDOMNode> selNode = GetTextNode(selection, mEditor);
if (!selNode)
return NS_OK;
nsCOMPtr<nsIDOMCharacterData> nodeAsText(do_QueryInterface(selNode));
if (!nodeAsText)
return NS_OK;
nodeAsText->ReplaceData(mLastStart, mLastLength, hiddenText);
selection->Collapse(selNode, start);
if (start != end)
selection->Extend(selNode, end);
return NS_OK;
}
// static
nsresult
nsTextEditRules::FillBufWithPWChars(nsAString *aOutString, PRInt32 aLength)
{
if (!aOutString) {return NS_ERROR_NULL_POINTER;}
// change the output to the platform password character
PRUnichar passwordChar = PRUnichar('*');
nsCOMPtr<nsILookAndFeel> lookAndFeel = do_GetService(kLookAndFeelCID);
if (lookAndFeel)
{
passwordChar = lookAndFeel->GetPasswordCharacter();
}
PRInt32 i;
aOutString->Truncate();
for (i=0; i < aLength; i++)
aOutString->Append(passwordChar);
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////
// CreateMozBR: put a BR node with moz attribute at {aNode, aOffset}
//
nsresult
nsTextEditRules::CreateMozBR(nsIDOMNode *inParent, PRInt32 inOffset, nsCOMPtr<nsIDOMNode> *outBRNode)
{
if (!inParent || !outBRNode) return NS_ERROR_NULL_POINTER;
nsresult res = mEditor->CreateBR(inParent, inOffset, outBRNode);
if (NS_FAILED(res)) return res;
// give it special moz attr
nsCOMPtr<nsIDOMElement> brElem = do_QueryInterface(*outBRNode);
if (brElem)
{
res = mEditor->SetAttribute(brElem, NS_LITERAL_STRING("type"), NS_LITERAL_STRING("_moz"));
if (NS_FAILED(res)) return res;
}
return res;
}
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