1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/editor/libeditor/text/nsTextEditRules.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,1374 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "mozilla/Assertions.h"
1.10 +#include "mozilla/LookAndFeel.h"
1.11 +#include "mozilla/Preferences.h"
1.12 +#include "mozilla/dom/Selection.h"
1.13 +#include "mozilla/TextComposition.h"
1.14 +#include "mozilla/dom/Element.h"
1.15 +#include "nsAString.h"
1.16 +#include "nsAutoPtr.h"
1.17 +#include "nsCOMPtr.h"
1.18 +#include "nsCRT.h"
1.19 +#include "nsCRTGlue.h"
1.20 +#include "nsComponentManagerUtils.h"
1.21 +#include "nsContentUtils.h"
1.22 +#include "nsDebug.h"
1.23 +#include "nsEditor.h"
1.24 +#include "nsEditorUtils.h"
1.25 +#include "nsError.h"
1.26 +#include "nsGkAtoms.h"
1.27 +#include "nsIContent.h"
1.28 +#include "nsIDOMCharacterData.h"
1.29 +#include "nsIDOMDocument.h"
1.30 +#include "nsIDOMElement.h"
1.31 +#include "nsIDOMNode.h"
1.32 +#include "nsIDOMNodeFilter.h"
1.33 +#include "nsIDOMNodeIterator.h"
1.34 +#include "nsIDOMNodeList.h"
1.35 +#include "nsIDOMText.h"
1.36 +#include "nsNameSpaceManager.h"
1.37 +#include "nsINode.h"
1.38 +#include "nsIPlaintextEditor.h"
1.39 +#include "nsISelection.h"
1.40 +#include "nsISelectionPrivate.h"
1.41 +#include "nsISupportsBase.h"
1.42 +#include "nsLiteralString.h"
1.43 +#include "mozilla/dom/NodeIterator.h"
1.44 +#include "nsTextEditRules.h"
1.45 +#include "nsTextEditUtils.h"
1.46 +#include "nsUnicharUtils.h"
1.47 +
1.48 +using namespace mozilla;
1.49 +using namespace mozilla::dom;
1.50 +
1.51 +#define CANCEL_OPERATION_IF_READONLY_OR_DISABLED \
1.52 + if (IsReadonly() || IsDisabled()) \
1.53 + { \
1.54 + *aCancel = true; \
1.55 + return NS_OK; \
1.56 + };
1.57 +
1.58 +
1.59 +/********************************************************
1.60 + * Constructor/Destructor
1.61 + ********************************************************/
1.62 +
1.63 +nsTextEditRules::nsTextEditRules()
1.64 +{
1.65 + InitFields();
1.66 +}
1.67 +
1.68 +void
1.69 +nsTextEditRules::InitFields()
1.70 +{
1.71 + mEditor = nullptr;
1.72 + mPasswordText.Truncate();
1.73 + mPasswordIMEText.Truncate();
1.74 + mPasswordIMEIndex = 0;
1.75 + mBogusNode = nullptr;
1.76 + mCachedSelectionNode = nullptr;
1.77 + mCachedSelectionOffset = 0;
1.78 + mActionNesting = 0;
1.79 + mLockRulesSniffing = false;
1.80 + mDidExplicitlySetInterline = false;
1.81 + mDeleteBidiImmediately = false;
1.82 + mTheAction = EditAction::none;
1.83 + mTimer = nullptr;
1.84 + mLastStart = 0;
1.85 + mLastLength = 0;
1.86 +}
1.87 +
1.88 +nsTextEditRules::~nsTextEditRules()
1.89 +{
1.90 + // do NOT delete mEditor here. We do not hold a ref count to mEditor. mEditor owns our lifespan.
1.91 +
1.92 + if (mTimer)
1.93 + mTimer->Cancel();
1.94 +}
1.95 +
1.96 +/********************************************************
1.97 + * XPCOM Cruft
1.98 + ********************************************************/
1.99 +
1.100 +NS_IMPL_CYCLE_COLLECTION(nsTextEditRules, mBogusNode, mCachedSelectionNode)
1.101 +
1.102 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsTextEditRules)
1.103 + NS_INTERFACE_MAP_ENTRY(nsIEditRules)
1.104 + NS_INTERFACE_MAP_ENTRY(nsITimerCallback)
1.105 + NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIEditRules)
1.106 +NS_INTERFACE_MAP_END
1.107 +
1.108 +NS_IMPL_CYCLE_COLLECTING_ADDREF(nsTextEditRules)
1.109 +NS_IMPL_CYCLE_COLLECTING_RELEASE(nsTextEditRules)
1.110 +
1.111 +/********************************************************
1.112 + * Public methods
1.113 + ********************************************************/
1.114 +
1.115 +NS_IMETHODIMP
1.116 +nsTextEditRules::Init(nsPlaintextEditor *aEditor)
1.117 +{
1.118 + if (!aEditor) { return NS_ERROR_NULL_POINTER; }
1.119 +
1.120 + InitFields();
1.121 +
1.122 + mEditor = aEditor; // we hold a non-refcounted reference back to our editor
1.123 + nsCOMPtr<nsISelection> selection;
1.124 + mEditor->GetSelection(getter_AddRefs(selection));
1.125 + NS_WARN_IF_FALSE(selection, "editor cannot get selection");
1.126 +
1.127 + // Put in a magic br if needed. This method handles null selection,
1.128 + // which should never happen anyway
1.129 + nsresult res = CreateBogusNodeIfNeeded(selection);
1.130 + NS_ENSURE_SUCCESS(res, res);
1.131 +
1.132 + // If the selection hasn't been set up yet, set it up collapsed to the end of
1.133 + // our editable content.
1.134 + int32_t rangeCount;
1.135 + res = selection->GetRangeCount(&rangeCount);
1.136 + NS_ENSURE_SUCCESS(res, res);
1.137 + if (!rangeCount) {
1.138 + res = mEditor->EndOfDocument();
1.139 + NS_ENSURE_SUCCESS(res, res);
1.140 + }
1.141 +
1.142 + if (IsPlaintextEditor())
1.143 + {
1.144 + // ensure trailing br node
1.145 + res = CreateTrailingBRIfNeeded();
1.146 + NS_ENSURE_SUCCESS(res, res);
1.147 + }
1.148 +
1.149 + mDeleteBidiImmediately =
1.150 + Preferences::GetBool("bidi.edit.delete_immediately", false);
1.151 +
1.152 + return res;
1.153 +}
1.154 +
1.155 +NS_IMETHODIMP
1.156 +nsTextEditRules::SetInitialValue(const nsAString& aValue)
1.157 +{
1.158 + if (IsPasswordEditor()) {
1.159 + mPasswordText = aValue;
1.160 + }
1.161 + return NS_OK;
1.162 +}
1.163 +
1.164 +NS_IMETHODIMP
1.165 +nsTextEditRules::DetachEditor()
1.166 +{
1.167 + if (mTimer)
1.168 + mTimer->Cancel();
1.169 +
1.170 + mEditor = nullptr;
1.171 + return NS_OK;
1.172 +}
1.173 +
1.174 +NS_IMETHODIMP
1.175 +nsTextEditRules::BeforeEdit(EditAction action,
1.176 + nsIEditor::EDirection aDirection)
1.177 +{
1.178 + if (mLockRulesSniffing) return NS_OK;
1.179 +
1.180 + nsAutoLockRulesSniffing lockIt(this);
1.181 + mDidExplicitlySetInterline = false;
1.182 + if (!mActionNesting)
1.183 + {
1.184 + // let rules remember the top level action
1.185 + mTheAction = action;
1.186 + }
1.187 + mActionNesting++;
1.188 +
1.189 + // get the selection and cache the position before editing
1.190 + nsCOMPtr<nsISelection> selection;
1.191 + NS_ENSURE_STATE(mEditor);
1.192 + nsresult res = mEditor->GetSelection(getter_AddRefs(selection));
1.193 + NS_ENSURE_SUCCESS(res, res);
1.194 +
1.195 + selection->GetAnchorNode(getter_AddRefs(mCachedSelectionNode));
1.196 + selection->GetAnchorOffset(&mCachedSelectionOffset);
1.197 +
1.198 + return NS_OK;
1.199 +}
1.200 +
1.201 +
1.202 +NS_IMETHODIMP
1.203 +nsTextEditRules::AfterEdit(EditAction action,
1.204 + nsIEditor::EDirection aDirection)
1.205 +{
1.206 + if (mLockRulesSniffing) return NS_OK;
1.207 +
1.208 + nsAutoLockRulesSniffing lockIt(this);
1.209 +
1.210 + NS_PRECONDITION(mActionNesting>0, "bad action nesting!");
1.211 + nsresult res = NS_OK;
1.212 + if (!--mActionNesting)
1.213 + {
1.214 + nsCOMPtr<nsISelection>selection;
1.215 + NS_ENSURE_STATE(mEditor);
1.216 + res = mEditor->GetSelection(getter_AddRefs(selection));
1.217 + NS_ENSURE_SUCCESS(res, res);
1.218 +
1.219 + NS_ENSURE_STATE(mEditor);
1.220 + res = mEditor->HandleInlineSpellCheck(action, selection,
1.221 + mCachedSelectionNode, mCachedSelectionOffset,
1.222 + nullptr, 0, nullptr, 0);
1.223 + NS_ENSURE_SUCCESS(res, res);
1.224 +
1.225 + // if only trailing <br> remaining remove it
1.226 + res = RemoveRedundantTrailingBR();
1.227 + if (NS_FAILED(res))
1.228 + return res;
1.229 +
1.230 + // detect empty doc
1.231 + res = CreateBogusNodeIfNeeded(selection);
1.232 + NS_ENSURE_SUCCESS(res, res);
1.233 +
1.234 + // ensure trailing br node
1.235 + res = CreateTrailingBRIfNeeded();
1.236 + NS_ENSURE_SUCCESS(res, res);
1.237 +
1.238 + // collapse the selection to the trailing BR if it's at the end of our text node
1.239 + CollapseSelectionToTrailingBRIfNeeded(selection);
1.240 + }
1.241 + return res;
1.242 +}
1.243 +
1.244 +
1.245 +NS_IMETHODIMP
1.246 +nsTextEditRules::WillDoAction(Selection* aSelection,
1.247 + nsRulesInfo* aInfo,
1.248 + bool* aCancel,
1.249 + bool* aHandled)
1.250 +{
1.251 + // null selection is legal
1.252 + MOZ_ASSERT(aInfo && aCancel && aHandled);
1.253 +
1.254 + *aCancel = false;
1.255 + *aHandled = false;
1.256 +
1.257 + // my kingdom for dynamic cast
1.258 + nsTextRulesInfo *info = static_cast<nsTextRulesInfo*>(aInfo);
1.259 +
1.260 + switch (info->action) {
1.261 + case EditAction::insertBreak:
1.262 + return WillInsertBreak(aSelection, aCancel, aHandled, info->maxLength);
1.263 + case EditAction::insertText:
1.264 + case EditAction::insertIMEText:
1.265 + return WillInsertText(info->action, aSelection, aCancel, aHandled,
1.266 + info->inString, info->outString, info->maxLength);
1.267 + case EditAction::deleteSelection:
1.268 + return WillDeleteSelection(aSelection, info->collapsedAction,
1.269 + aCancel, aHandled);
1.270 + case EditAction::undo:
1.271 + return WillUndo(aSelection, aCancel, aHandled);
1.272 + case EditAction::redo:
1.273 + return WillRedo(aSelection, aCancel, aHandled);
1.274 + case EditAction::setTextProperty:
1.275 + return WillSetTextProperty(aSelection, aCancel, aHandled);
1.276 + case EditAction::removeTextProperty:
1.277 + return WillRemoveTextProperty(aSelection, aCancel, aHandled);
1.278 + case EditAction::outputText:
1.279 + return WillOutputText(aSelection, info->outputFormat, info->outString,
1.280 + aCancel, aHandled);
1.281 + case EditAction::insertElement:
1.282 + // i had thought this would be html rules only. but we put pre elements
1.283 + // into plaintext mail when doing quoting for reply! doh!
1.284 + return WillInsert(aSelection, aCancel);
1.285 + default:
1.286 + return NS_ERROR_FAILURE;
1.287 + }
1.288 +}
1.289 +
1.290 +NS_IMETHODIMP
1.291 +nsTextEditRules::DidDoAction(nsISelection *aSelection,
1.292 + nsRulesInfo *aInfo, nsresult aResult)
1.293 +{
1.294 + NS_ENSURE_STATE(mEditor);
1.295 + // don't let any txns in here move the selection around behind our back.
1.296 + // Note that this won't prevent explicit selection setting from working.
1.297 + nsAutoTxnsConserveSelection dontSpazMySelection(mEditor);
1.298 +
1.299 + NS_ENSURE_TRUE(aSelection && aInfo, NS_ERROR_NULL_POINTER);
1.300 +
1.301 + // my kingdom for dynamic cast
1.302 + nsTextRulesInfo *info = static_cast<nsTextRulesInfo*>(aInfo);
1.303 +
1.304 + switch (info->action)
1.305 + {
1.306 + case EditAction::insertBreak:
1.307 + return DidInsertBreak(aSelection, aResult);
1.308 + case EditAction::insertText:
1.309 + case EditAction::insertIMEText:
1.310 + return DidInsertText(aSelection, aResult);
1.311 + case EditAction::deleteSelection:
1.312 + return DidDeleteSelection(aSelection, info->collapsedAction, aResult);
1.313 + case EditAction::undo:
1.314 + return DidUndo(aSelection, aResult);
1.315 + case EditAction::redo:
1.316 + return DidRedo(aSelection, aResult);
1.317 + case EditAction::setTextProperty:
1.318 + return DidSetTextProperty(aSelection, aResult);
1.319 + case EditAction::removeTextProperty:
1.320 + return DidRemoveTextProperty(aSelection, aResult);
1.321 + case EditAction::outputText:
1.322 + return DidOutputText(aSelection, aResult);
1.323 + default:
1.324 + // Don't fail on transactions we don't handle here!
1.325 + return NS_OK;
1.326 + }
1.327 +}
1.328 +
1.329 +
1.330 +NS_IMETHODIMP
1.331 +nsTextEditRules::DocumentIsEmpty(bool *aDocumentIsEmpty)
1.332 +{
1.333 + NS_ENSURE_TRUE(aDocumentIsEmpty, NS_ERROR_NULL_POINTER);
1.334 +
1.335 + *aDocumentIsEmpty = (mBogusNode != nullptr);
1.336 + return NS_OK;
1.337 +}
1.338 +
1.339 +/********************************************************
1.340 + * Protected methods
1.341 + ********************************************************/
1.342 +
1.343 +
1.344 +nsresult
1.345 +nsTextEditRules::WillInsert(nsISelection *aSelection, bool *aCancel)
1.346 +{
1.347 + NS_ENSURE_TRUE(aSelection && aCancel, NS_ERROR_NULL_POINTER);
1.348 +
1.349 + CANCEL_OPERATION_IF_READONLY_OR_DISABLED
1.350 +
1.351 + // initialize out param
1.352 + *aCancel = false;
1.353 +
1.354 + // check for the magic content node and delete it if it exists
1.355 + if (mBogusNode)
1.356 + {
1.357 + NS_ENSURE_STATE(mEditor);
1.358 + mEditor->DeleteNode(mBogusNode);
1.359 + mBogusNode = nullptr;
1.360 + }
1.361 +
1.362 + return NS_OK;
1.363 +}
1.364 +
1.365 +nsresult
1.366 +nsTextEditRules::DidInsert(nsISelection *aSelection, nsresult aResult)
1.367 +{
1.368 + return NS_OK;
1.369 +}
1.370 +
1.371 +nsresult
1.372 +nsTextEditRules::WillInsertBreak(Selection* aSelection,
1.373 + bool *aCancel,
1.374 + bool *aHandled,
1.375 + int32_t aMaxLength)
1.376 +{
1.377 + if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
1.378 + CANCEL_OPERATION_IF_READONLY_OR_DISABLED
1.379 + *aHandled = false;
1.380 + if (IsSingleLineEditor()) {
1.381 + *aCancel = true;
1.382 + }
1.383 + else
1.384 + {
1.385 + // handle docs with a max length
1.386 + // NOTE, this function copies inString into outString for us.
1.387 + NS_NAMED_LITERAL_STRING(inString, "\n");
1.388 + nsAutoString outString;
1.389 + bool didTruncate;
1.390 + nsresult res = TruncateInsertionIfNeeded(aSelection, &inString, &outString,
1.391 + aMaxLength, &didTruncate);
1.392 + NS_ENSURE_SUCCESS(res, res);
1.393 + if (didTruncate) {
1.394 + *aCancel = true;
1.395 + return NS_OK;
1.396 + }
1.397 +
1.398 + *aCancel = false;
1.399 +
1.400 + // if the selection isn't collapsed, delete it.
1.401 + bool bCollapsed;
1.402 + res = aSelection->GetIsCollapsed(&bCollapsed);
1.403 + NS_ENSURE_SUCCESS(res, res);
1.404 + if (!bCollapsed)
1.405 + {
1.406 + NS_ENSURE_STATE(mEditor);
1.407 + res = mEditor->DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip);
1.408 + NS_ENSURE_SUCCESS(res, res);
1.409 + }
1.410 +
1.411 + res = WillInsert(aSelection, aCancel);
1.412 + NS_ENSURE_SUCCESS(res, res);
1.413 + // initialize out param
1.414 + // we want to ignore result of WillInsert()
1.415 + *aCancel = false;
1.416 +
1.417 + }
1.418 + return NS_OK;
1.419 +}
1.420 +
1.421 +nsresult
1.422 +nsTextEditRules::DidInsertBreak(nsISelection *aSelection, nsresult aResult)
1.423 +{
1.424 + return NS_OK;
1.425 +}
1.426 +
1.427 +nsresult
1.428 +nsTextEditRules::CollapseSelectionToTrailingBRIfNeeded(nsISelection* aSelection)
1.429 +{
1.430 + // we only need to execute the stuff below if we are a plaintext editor.
1.431 + // html editors have a different mechanism for putting in mozBR's
1.432 + // (because there are a bunch more places you have to worry about it in html)
1.433 + if (!IsPlaintextEditor()) {
1.434 + return NS_OK;
1.435 + }
1.436 +
1.437 + // if we are at the end of the textarea, we need to set the
1.438 + // selection to stick to the mozBR at the end of the textarea.
1.439 + int32_t selOffset;
1.440 + nsCOMPtr<nsIDOMNode> selNode;
1.441 + nsresult res;
1.442 + NS_ENSURE_STATE(mEditor);
1.443 + res = mEditor->GetStartNodeAndOffset(aSelection, getter_AddRefs(selNode), &selOffset);
1.444 + NS_ENSURE_SUCCESS(res, res);
1.445 +
1.446 + nsCOMPtr<nsIDOMText> nodeAsText = do_QueryInterface(selNode);
1.447 + if (!nodeAsText) return NS_OK; // nothing to do if we're not at a text node
1.448 +
1.449 + uint32_t length;
1.450 + res = nodeAsText->GetLength(&length);
1.451 + NS_ENSURE_SUCCESS(res, res);
1.452 +
1.453 + // nothing to do if we're not at the end of the text node
1.454 + if (selOffset != int32_t(length))
1.455 + return NS_OK;
1.456 +
1.457 + int32_t parentOffset;
1.458 + nsCOMPtr<nsIDOMNode> parentNode = nsEditor::GetNodeLocation(selNode, &parentOffset);
1.459 +
1.460 + NS_ENSURE_STATE(mEditor);
1.461 + nsCOMPtr<nsIDOMNode> root = do_QueryInterface(mEditor->GetRoot());
1.462 + NS_ENSURE_TRUE(root, NS_ERROR_NULL_POINTER);
1.463 + if (parentNode != root) return NS_OK;
1.464 +
1.465 + nsCOMPtr<nsIDOMNode> nextNode = mEditor->GetChildAt(parentNode,
1.466 + parentOffset + 1);
1.467 + if (nextNode && nsTextEditUtils::IsMozBR(nextNode))
1.468 + {
1.469 + res = aSelection->Collapse(parentNode, parentOffset + 1);
1.470 + NS_ENSURE_SUCCESS(res, res);
1.471 + }
1.472 + return res;
1.473 +}
1.474 +
1.475 +static inline already_AddRefed<nsIDOMNode>
1.476 +GetTextNode(nsISelection *selection, nsEditor *editor) {
1.477 + int32_t selOffset;
1.478 + nsCOMPtr<nsIDOMNode> selNode;
1.479 + nsresult res = editor->GetStartNodeAndOffset(selection, getter_AddRefs(selNode), &selOffset);
1.480 + NS_ENSURE_SUCCESS(res, nullptr);
1.481 + if (!editor->IsTextNode(selNode)) {
1.482 + // Get an nsINode from the nsIDOMNode
1.483 + nsCOMPtr<nsINode> node = do_QueryInterface(selNode);
1.484 + // if node is null, return it to indicate there's no text
1.485 + NS_ENSURE_TRUE(node, nullptr);
1.486 + // This should be the root node, walk the tree looking for text nodes
1.487 + mozilla::dom::NodeFilterHolder filter;
1.488 + mozilla::dom::NodeIterator iter(node, nsIDOMNodeFilter::SHOW_TEXT, filter);
1.489 + while (!editor->IsTextNode(selNode)) {
1.490 + if (NS_FAILED(res = iter.NextNode(getter_AddRefs(selNode))) || !selNode) {
1.491 + return nullptr;
1.492 + }
1.493 + }
1.494 + }
1.495 + return selNode.forget();
1.496 +}
1.497 +#ifdef DEBUG
1.498 +#define ASSERT_PASSWORD_LENGTHS_EQUAL() \
1.499 + if (IsPasswordEditor() && mEditor->GetRoot()) { \
1.500 + int32_t txtLen; \
1.501 + mEditor->GetTextLength(&txtLen); \
1.502 + NS_ASSERTION(mPasswordText.Length() == uint32_t(txtLen), \
1.503 + "password length not equal to number of asterisks"); \
1.504 + }
1.505 +#else
1.506 +#define ASSERT_PASSWORD_LENGTHS_EQUAL()
1.507 +#endif
1.508 +
1.509 +// static
1.510 +void
1.511 +nsTextEditRules::HandleNewLines(nsString &aString,
1.512 + int32_t aNewlineHandling)
1.513 +{
1.514 + if (aNewlineHandling < 0) {
1.515 + int32_t caretStyle;
1.516 + nsPlaintextEditor::GetDefaultEditorPrefs(aNewlineHandling, caretStyle);
1.517 + }
1.518 +
1.519 + switch(aNewlineHandling)
1.520 + {
1.521 + case nsIPlaintextEditor::eNewlinesReplaceWithSpaces:
1.522 + // Strip trailing newlines first so we don't wind up with trailing spaces
1.523 + aString.Trim(CRLF, false, true);
1.524 + aString.ReplaceChar(CRLF, ' ');
1.525 + break;
1.526 + case nsIPlaintextEditor::eNewlinesStrip:
1.527 + aString.StripChars(CRLF);
1.528 + break;
1.529 + case nsIPlaintextEditor::eNewlinesPasteToFirst:
1.530 + default:
1.531 + {
1.532 + int32_t firstCRLF = aString.FindCharInSet(CRLF);
1.533 +
1.534 + // we get first *non-empty* line.
1.535 + int32_t offset = 0;
1.536 + while (firstCRLF == offset)
1.537 + {
1.538 + offset++;
1.539 + firstCRLF = aString.FindCharInSet(CRLF, offset);
1.540 + }
1.541 + if (firstCRLF > 0)
1.542 + aString.Truncate(firstCRLF);
1.543 + if (offset > 0)
1.544 + aString.Cut(0, offset);
1.545 + }
1.546 + break;
1.547 + case nsIPlaintextEditor::eNewlinesReplaceWithCommas:
1.548 + aString.Trim(CRLF, true, true);
1.549 + aString.ReplaceChar(CRLF, ',');
1.550 + break;
1.551 + case nsIPlaintextEditor::eNewlinesStripSurroundingWhitespace:
1.552 + {
1.553 + nsString result;
1.554 + uint32_t offset = 0;
1.555 + while (offset < aString.Length())
1.556 + {
1.557 + int32_t nextCRLF = aString.FindCharInSet(CRLF, offset);
1.558 + if (nextCRLF < 0) {
1.559 + result.Append(nsDependentSubstring(aString, offset));
1.560 + break;
1.561 + }
1.562 + uint32_t wsBegin = nextCRLF;
1.563 + // look backwards for the first non-whitespace char
1.564 + while (wsBegin > offset && NS_IS_SPACE(aString[wsBegin - 1]))
1.565 + --wsBegin;
1.566 + result.Append(nsDependentSubstring(aString, offset, wsBegin - offset));
1.567 + offset = nextCRLF + 1;
1.568 + while (offset < aString.Length() && NS_IS_SPACE(aString[offset]))
1.569 + ++offset;
1.570 + }
1.571 + aString = result;
1.572 + }
1.573 + break;
1.574 + case nsIPlaintextEditor::eNewlinesPasteIntact:
1.575 + // even if we're pasting newlines, don't paste leading/trailing ones
1.576 + aString.Trim(CRLF, true, true);
1.577 + break;
1.578 + }
1.579 +}
1.580 +
1.581 +nsresult
1.582 +nsTextEditRules::WillInsertText(EditAction aAction,
1.583 + Selection* aSelection,
1.584 + bool *aCancel,
1.585 + bool *aHandled,
1.586 + const nsAString *inString,
1.587 + nsAString *outString,
1.588 + int32_t aMaxLength)
1.589 +{
1.590 + if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
1.591 +
1.592 + if (inString->IsEmpty() && aAction != EditAction::insertIMEText) {
1.593 + // HACK: this is a fix for bug 19395
1.594 + // I can't outlaw all empty insertions
1.595 + // because IME transaction depend on them
1.596 + // There is more work to do to make the
1.597 + // world safe for IME.
1.598 + *aCancel = true;
1.599 + *aHandled = false;
1.600 + return NS_OK;
1.601 + }
1.602 +
1.603 + // initialize out param
1.604 + *aCancel = false;
1.605 + *aHandled = true;
1.606 +
1.607 + // handle docs with a max length
1.608 + // NOTE, this function copies inString into outString for us.
1.609 + bool truncated = false;
1.610 + nsresult res = TruncateInsertionIfNeeded(aSelection, inString, outString,
1.611 + aMaxLength, &truncated);
1.612 + NS_ENSURE_SUCCESS(res, res);
1.613 + // If we're exceeding the maxlength when composing IME, we need to clean up
1.614 + // the composing text, so we shouldn't return early.
1.615 + if (truncated && outString->IsEmpty() &&
1.616 + aAction != EditAction::insertIMEText) {
1.617 + *aCancel = true;
1.618 + return NS_OK;
1.619 + }
1.620 +
1.621 + int32_t start = 0;
1.622 + int32_t end = 0;
1.623 +
1.624 + // handle password field docs
1.625 + if (IsPasswordEditor()) {
1.626 + NS_ENSURE_STATE(mEditor);
1.627 + nsContentUtils::GetSelectionInTextControl(aSelection, mEditor->GetRoot(),
1.628 + start, end);
1.629 + }
1.630 +
1.631 + // if the selection isn't collapsed, delete it.
1.632 + bool bCollapsed;
1.633 + res = aSelection->GetIsCollapsed(&bCollapsed);
1.634 + NS_ENSURE_SUCCESS(res, res);
1.635 + if (!bCollapsed)
1.636 + {
1.637 + NS_ENSURE_STATE(mEditor);
1.638 + res = mEditor->DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip);
1.639 + NS_ENSURE_SUCCESS(res, res);
1.640 + }
1.641 +
1.642 + res = WillInsert(aSelection, aCancel);
1.643 + NS_ENSURE_SUCCESS(res, res);
1.644 + // initialize out param
1.645 + // we want to ignore result of WillInsert()
1.646 + *aCancel = false;
1.647 +
1.648 + // handle password field data
1.649 + // this has the side effect of changing all the characters in aOutString
1.650 + // to the replacement character
1.651 + if (IsPasswordEditor())
1.652 + {
1.653 + if (aAction == EditAction::insertIMEText) {
1.654 + RemoveIMETextFromPWBuf(start, outString);
1.655 + }
1.656 + }
1.657 +
1.658 + // People have lots of different ideas about what text fields
1.659 + // should do with multiline pastes. See bugs 21032, 23485, 23485, 50935.
1.660 + // The six possible options are:
1.661 + // 0. paste newlines intact
1.662 + // 1. paste up to the first newline (default)
1.663 + // 2. replace newlines with spaces
1.664 + // 3. strip newlines
1.665 + // 4. replace with commas
1.666 + // 5. strip newlines and surrounding whitespace
1.667 + // So find out what we're expected to do:
1.668 + if (IsSingleLineEditor())
1.669 + {
1.670 + nsAutoString tString(*outString);
1.671 +
1.672 + NS_ENSURE_STATE(mEditor);
1.673 + HandleNewLines(tString, mEditor->mNewlineHandling);
1.674 +
1.675 + outString->Assign(tString);
1.676 + }
1.677 +
1.678 + if (IsPasswordEditor())
1.679 + {
1.680 + // manage the password buffer
1.681 + mPasswordText.Insert(*outString, start);
1.682 +
1.683 + if (LookAndFeel::GetEchoPassword() && !DontEchoPassword()) {
1.684 + HideLastPWInput();
1.685 + mLastStart = start;
1.686 + mLastLength = outString->Length();
1.687 + if (mTimer)
1.688 + {
1.689 + mTimer->Cancel();
1.690 + }
1.691 + else
1.692 + {
1.693 + mTimer = do_CreateInstance("@mozilla.org/timer;1", &res);
1.694 + NS_ENSURE_SUCCESS(res, res);
1.695 + }
1.696 + mTimer->InitWithCallback(this, LookAndFeel::GetPasswordMaskDelay(),
1.697 + nsITimer::TYPE_ONE_SHOT);
1.698 + }
1.699 + else
1.700 + {
1.701 + FillBufWithPWChars(outString, outString->Length());
1.702 + }
1.703 + }
1.704 +
1.705 + // get the (collapsed) selection location
1.706 + nsCOMPtr<nsIDOMNode> selNode;
1.707 + int32_t selOffset;
1.708 + NS_ENSURE_STATE(mEditor);
1.709 + res = mEditor->GetStartNodeAndOffset(aSelection, getter_AddRefs(selNode), &selOffset);
1.710 + NS_ENSURE_SUCCESS(res, res);
1.711 +
1.712 + // don't put text in places that can't have it
1.713 + NS_ENSURE_STATE(mEditor);
1.714 + if (!mEditor->IsTextNode(selNode) &&
1.715 + !mEditor->CanContainTag(selNode, nsGkAtoms::textTagName)) {
1.716 + return NS_ERROR_FAILURE;
1.717 + }
1.718 +
1.719 + // we need to get the doc
1.720 + NS_ENSURE_STATE(mEditor);
1.721 + nsCOMPtr<nsIDOMDocument> doc = mEditor->GetDOMDocument();
1.722 + NS_ENSURE_TRUE(doc, NS_ERROR_NOT_INITIALIZED);
1.723 +
1.724 + if (aAction == EditAction::insertIMEText) {
1.725 + NS_ENSURE_STATE(mEditor);
1.726 + res = mEditor->InsertTextImpl(*outString, address_of(selNode), &selOffset, doc);
1.727 + NS_ENSURE_SUCCESS(res, res);
1.728 + } else {
1.729 + // aAction == EditAction::insertText; find where we are
1.730 + nsCOMPtr<nsIDOMNode> curNode = selNode;
1.731 + int32_t curOffset = selOffset;
1.732 +
1.733 + // don't spaz my selection in subtransactions
1.734 + NS_ENSURE_STATE(mEditor);
1.735 + nsAutoTxnsConserveSelection dontSpazMySelection(mEditor);
1.736 +
1.737 + res = mEditor->InsertTextImpl(*outString, address_of(curNode),
1.738 + &curOffset, doc);
1.739 + NS_ENSURE_SUCCESS(res, res);
1.740 +
1.741 + if (curNode)
1.742 + {
1.743 + // Make the caret attach to the inserted text, unless this text ends with a LF,
1.744 + // in which case make the caret attach to the next line.
1.745 + bool endsWithLF =
1.746 + !outString->IsEmpty() && outString->Last() == nsCRT::LF;
1.747 + aSelection->SetInterlinePosition(endsWithLF);
1.748 +
1.749 + aSelection->Collapse(curNode, curOffset);
1.750 + }
1.751 + }
1.752 + ASSERT_PASSWORD_LENGTHS_EQUAL()
1.753 + return res;
1.754 +}
1.755 +
1.756 +nsresult
1.757 +nsTextEditRules::DidInsertText(nsISelection *aSelection,
1.758 + nsresult aResult)
1.759 +{
1.760 + return DidInsert(aSelection, aResult);
1.761 +}
1.762 +
1.763 +
1.764 +
1.765 +nsresult
1.766 +nsTextEditRules::WillSetTextProperty(nsISelection *aSelection, bool *aCancel, bool *aHandled)
1.767 +{
1.768 + if (!aSelection || !aCancel || !aHandled)
1.769 + { return NS_ERROR_NULL_POINTER; }
1.770 +
1.771 + // XXX: should probably return a success value other than NS_OK that means "not allowed"
1.772 + if (IsPlaintextEditor()) {
1.773 + *aCancel = true;
1.774 + }
1.775 + return NS_OK;
1.776 +}
1.777 +
1.778 +nsresult
1.779 +nsTextEditRules::DidSetTextProperty(nsISelection *aSelection, nsresult aResult)
1.780 +{
1.781 + return NS_OK;
1.782 +}
1.783 +
1.784 +nsresult
1.785 +nsTextEditRules::WillRemoveTextProperty(nsISelection *aSelection, bool *aCancel, bool *aHandled)
1.786 +{
1.787 + if (!aSelection || !aCancel || !aHandled)
1.788 + { return NS_ERROR_NULL_POINTER; }
1.789 +
1.790 + // XXX: should probably return a success value other than NS_OK that means "not allowed"
1.791 + if (IsPlaintextEditor()) {
1.792 + *aCancel = true;
1.793 + }
1.794 + return NS_OK;
1.795 +}
1.796 +
1.797 +nsresult
1.798 +nsTextEditRules::DidRemoveTextProperty(nsISelection *aSelection, nsresult aResult)
1.799 +{
1.800 + return NS_OK;
1.801 +}
1.802 +
1.803 +nsresult
1.804 +nsTextEditRules::WillDeleteSelection(Selection* aSelection,
1.805 + nsIEditor::EDirection aCollapsedAction,
1.806 + bool *aCancel,
1.807 + bool *aHandled)
1.808 +{
1.809 + if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
1.810 + CANCEL_OPERATION_IF_READONLY_OR_DISABLED
1.811 +
1.812 + // initialize out param
1.813 + *aCancel = false;
1.814 + *aHandled = false;
1.815 +
1.816 + // if there is only bogus content, cancel the operation
1.817 + if (mBogusNode) {
1.818 + *aCancel = true;
1.819 + return NS_OK;
1.820 + }
1.821 +
1.822 + nsresult res = NS_OK;
1.823 + nsAutoScriptBlocker scriptBlocker;
1.824 +
1.825 + if (IsPasswordEditor())
1.826 + {
1.827 + NS_ENSURE_STATE(mEditor);
1.828 + res = mEditor->ExtendSelectionForDelete(aSelection, &aCollapsedAction);
1.829 + NS_ENSURE_SUCCESS(res, res);
1.830 +
1.831 + // manage the password buffer
1.832 + int32_t start, end;
1.833 + nsContentUtils::GetSelectionInTextControl(aSelection, mEditor->GetRoot(),
1.834 + start, end);
1.835 +
1.836 + if (LookAndFeel::GetEchoPassword()) {
1.837 + HideLastPWInput();
1.838 + mLastStart = start;
1.839 + mLastLength = 0;
1.840 + if (mTimer)
1.841 + {
1.842 + mTimer->Cancel();
1.843 + }
1.844 + }
1.845 +
1.846 + if (end == start)
1.847 + { // collapsed selection
1.848 + if (nsIEditor::ePrevious==aCollapsedAction && 0<start) { // del back
1.849 + mPasswordText.Cut(start-1, 1);
1.850 + }
1.851 + else if (nsIEditor::eNext==aCollapsedAction) { // del forward
1.852 + mPasswordText.Cut(start, 1);
1.853 + }
1.854 + // otherwise nothing to do for this collapsed selection
1.855 + }
1.856 + else { // extended selection
1.857 + mPasswordText.Cut(start, end-start);
1.858 + }
1.859 + }
1.860 + else
1.861 + {
1.862 + nsCOMPtr<nsIDOMNode> startNode;
1.863 + int32_t startOffset;
1.864 + NS_ENSURE_STATE(mEditor);
1.865 + res = mEditor->GetStartNodeAndOffset(aSelection, getter_AddRefs(startNode), &startOffset);
1.866 + NS_ENSURE_SUCCESS(res, res);
1.867 + NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE);
1.868 +
1.869 + bool bCollapsed;
1.870 + res = aSelection->GetIsCollapsed(&bCollapsed);
1.871 + NS_ENSURE_SUCCESS(res, res);
1.872 +
1.873 + if (!bCollapsed)
1.874 + return NS_OK;
1.875 +
1.876 + // Test for distance between caret and text that will be deleted
1.877 + res = CheckBidiLevelForDeletion(aSelection, startNode, startOffset, aCollapsedAction, aCancel);
1.878 + NS_ENSURE_SUCCESS(res, res);
1.879 + if (*aCancel) return NS_OK;
1.880 +
1.881 + NS_ENSURE_STATE(mEditor);
1.882 + res = mEditor->ExtendSelectionForDelete(aSelection, &aCollapsedAction);
1.883 + NS_ENSURE_SUCCESS(res, res);
1.884 + }
1.885 +
1.886 + NS_ENSURE_STATE(mEditor);
1.887 + res = mEditor->DeleteSelectionImpl(aCollapsedAction, nsIEditor::eStrip);
1.888 + NS_ENSURE_SUCCESS(res, res);
1.889 +
1.890 + *aHandled = true;
1.891 + ASSERT_PASSWORD_LENGTHS_EQUAL()
1.892 + return NS_OK;
1.893 +}
1.894 +
1.895 +nsresult
1.896 +nsTextEditRules::DidDeleteSelection(nsISelection *aSelection,
1.897 + nsIEditor::EDirection aCollapsedAction,
1.898 + nsresult aResult)
1.899 +{
1.900 + nsCOMPtr<nsIDOMNode> startNode;
1.901 + int32_t startOffset;
1.902 + NS_ENSURE_STATE(mEditor);
1.903 + nsresult res = mEditor->GetStartNodeAndOffset(aSelection, getter_AddRefs(startNode), &startOffset);
1.904 + NS_ENSURE_SUCCESS(res, res);
1.905 + NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE);
1.906 +
1.907 + // delete empty text nodes at selection
1.908 + if (mEditor->IsTextNode(startNode))
1.909 + {
1.910 + nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(startNode);
1.911 + uint32_t strLength;
1.912 + res = textNode->GetLength(&strLength);
1.913 + NS_ENSURE_SUCCESS(res, res);
1.914 +
1.915 + // are we in an empty text node?
1.916 + if (!strLength)
1.917 + {
1.918 + res = mEditor->DeleteNode(startNode);
1.919 + NS_ENSURE_SUCCESS(res, res);
1.920 + }
1.921 + }
1.922 + if (!mDidExplicitlySetInterline)
1.923 + {
1.924 + // We prevent the caret from sticking on the left of prior BR
1.925 + // (i.e. the end of previous line) after this deletion. Bug 92124
1.926 + nsCOMPtr<nsISelectionPrivate> selPriv = do_QueryInterface(aSelection);
1.927 + if (selPriv) res = selPriv->SetInterlinePosition(true);
1.928 + }
1.929 + return res;
1.930 +}
1.931 +
1.932 +nsresult
1.933 +nsTextEditRules::WillUndo(nsISelection *aSelection, bool *aCancel, bool *aHandled)
1.934 +{
1.935 + if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
1.936 + CANCEL_OPERATION_IF_READONLY_OR_DISABLED
1.937 + // initialize out param
1.938 + *aCancel = false;
1.939 + *aHandled = false;
1.940 + return NS_OK;
1.941 +}
1.942 +
1.943 +/* the idea here is to see if the magic empty node has suddenly reappeared as the result of the undo.
1.944 + * if it has, set our state so we remember it.
1.945 + * There is a tradeoff between doing here and at redo, or doing it everywhere else that might care.
1.946 + * Since undo and redo are relatively rare, it makes sense to take the (small) performance hit here.
1.947 + */
1.948 +nsresult
1.949 +nsTextEditRules::DidUndo(nsISelection *aSelection, nsresult aResult)
1.950 +{
1.951 + NS_ENSURE_TRUE(aSelection, NS_ERROR_NULL_POINTER);
1.952 + // If aResult is an error, we return it.
1.953 + NS_ENSURE_SUCCESS(aResult, aResult);
1.954 +
1.955 + NS_ENSURE_STATE(mEditor);
1.956 + dom::Element* theRoot = mEditor->GetRoot();
1.957 + NS_ENSURE_TRUE(theRoot, NS_ERROR_FAILURE);
1.958 + nsIContent* node = mEditor->GetLeftmostChild(theRoot);
1.959 + if (node && mEditor->IsMozEditorBogusNode(node)) {
1.960 + mBogusNode = do_QueryInterface(node);
1.961 + } else {
1.962 + mBogusNode = nullptr;
1.963 + }
1.964 + return aResult;
1.965 +}
1.966 +
1.967 +nsresult
1.968 +nsTextEditRules::WillRedo(nsISelection *aSelection, bool *aCancel, bool *aHandled)
1.969 +{
1.970 + if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
1.971 + CANCEL_OPERATION_IF_READONLY_OR_DISABLED
1.972 + // initialize out param
1.973 + *aCancel = false;
1.974 + *aHandled = false;
1.975 + return NS_OK;
1.976 +}
1.977 +
1.978 +nsresult
1.979 +nsTextEditRules::DidRedo(nsISelection *aSelection, nsresult aResult)
1.980 +{
1.981 + nsresult res = aResult; // if aResult is an error, we return it.
1.982 + if (!aSelection) { return NS_ERROR_NULL_POINTER; }
1.983 + if (NS_SUCCEEDED(res))
1.984 + {
1.985 + NS_ENSURE_STATE(mEditor);
1.986 + nsCOMPtr<nsIDOMElement> theRoot = do_QueryInterface(mEditor->GetRoot());
1.987 + NS_ENSURE_TRUE(theRoot, NS_ERROR_FAILURE);
1.988 +
1.989 + nsCOMPtr<nsIDOMHTMLCollection> nodeList;
1.990 + res = theRoot->GetElementsByTagName(NS_LITERAL_STRING("br"),
1.991 + getter_AddRefs(nodeList));
1.992 + NS_ENSURE_SUCCESS(res, res);
1.993 + if (nodeList)
1.994 + {
1.995 + uint32_t len;
1.996 + nodeList->GetLength(&len);
1.997 +
1.998 + if (len != 1) {
1.999 + // only in the case of one br could there be the bogus node
1.1000 + mBogusNode = nullptr;
1.1001 + return NS_OK;
1.1002 + }
1.1003 +
1.1004 + nsCOMPtr<nsIDOMNode> node;
1.1005 + nodeList->Item(0, getter_AddRefs(node));
1.1006 + nsCOMPtr<nsIContent> content = do_QueryInterface(node);
1.1007 + MOZ_ASSERT(content);
1.1008 + if (mEditor->IsMozEditorBogusNode(content)) {
1.1009 + mBogusNode = node;
1.1010 + } else {
1.1011 + mBogusNode = nullptr;
1.1012 + }
1.1013 + }
1.1014 + }
1.1015 + return res;
1.1016 +}
1.1017 +
1.1018 +nsresult
1.1019 +nsTextEditRules::WillOutputText(nsISelection *aSelection,
1.1020 + const nsAString *aOutputFormat,
1.1021 + nsAString *aOutString,
1.1022 + bool *aCancel,
1.1023 + bool *aHandled)
1.1024 +{
1.1025 + // null selection ok
1.1026 + if (!aOutString || !aOutputFormat || !aCancel || !aHandled)
1.1027 + { return NS_ERROR_NULL_POINTER; }
1.1028 +
1.1029 + // initialize out param
1.1030 + *aCancel = false;
1.1031 + *aHandled = false;
1.1032 +
1.1033 + nsAutoString outputFormat(*aOutputFormat);
1.1034 + ToLowerCase(outputFormat);
1.1035 + if (outputFormat.EqualsLiteral("text/plain"))
1.1036 + { // only use these rules for plain text output
1.1037 + if (IsPasswordEditor())
1.1038 + {
1.1039 + *aOutString = mPasswordText;
1.1040 + *aHandled = true;
1.1041 + }
1.1042 + else if (mBogusNode)
1.1043 + { // this means there's no content, so output null string
1.1044 + aOutString->Truncate();
1.1045 + *aHandled = true;
1.1046 + }
1.1047 + }
1.1048 + return NS_OK;
1.1049 +}
1.1050 +
1.1051 +nsresult
1.1052 +nsTextEditRules::DidOutputText(nsISelection *aSelection, nsresult aResult)
1.1053 +{
1.1054 + return NS_OK;
1.1055 +}
1.1056 +
1.1057 +nsresult
1.1058 +nsTextEditRules::RemoveRedundantTrailingBR()
1.1059 +{
1.1060 + // If the bogus node exists, we have no work to do
1.1061 + if (mBogusNode)
1.1062 + return NS_OK;
1.1063 +
1.1064 + // Likewise, nothing to be done if we could never have inserted a trailing br
1.1065 + if (IsSingleLineEditor())
1.1066 + return NS_OK;
1.1067 +
1.1068 + NS_ENSURE_STATE(mEditor);
1.1069 + nsRefPtr<dom::Element> body = mEditor->GetRoot();
1.1070 + if (!body)
1.1071 + return NS_ERROR_NULL_POINTER;
1.1072 +
1.1073 + uint32_t childCount = body->GetChildCount();
1.1074 + if (childCount > 1) {
1.1075 + // The trailing br is redundant if it is the only remaining child node
1.1076 + return NS_OK;
1.1077 + }
1.1078 +
1.1079 + nsRefPtr<nsIContent> child = body->GetFirstChild();
1.1080 + if (!child || !child->IsElement()) {
1.1081 + return NS_OK;
1.1082 + }
1.1083 +
1.1084 + dom::Element* elem = child->AsElement();
1.1085 + if (!nsTextEditUtils::IsMozBR(elem)) {
1.1086 + return NS_OK;
1.1087 + }
1.1088 +
1.1089 + // Rather than deleting this node from the DOM tree we should instead
1.1090 + // morph this br into the bogus node
1.1091 + elem->UnsetAttr(kNameSpaceID_None, nsGkAtoms::type, true);
1.1092 +
1.1093 + // set mBogusNode to be this <br>
1.1094 + mBogusNode = do_QueryInterface(elem);
1.1095 +
1.1096 + // give it the bogus node attribute
1.1097 + elem->SetAttr(kNameSpaceID_None, kMOZEditorBogusNodeAttrAtom,
1.1098 + kMOZEditorBogusNodeValue, false);
1.1099 + return NS_OK;
1.1100 +}
1.1101 +
1.1102 +nsresult
1.1103 +nsTextEditRules::CreateTrailingBRIfNeeded()
1.1104 +{
1.1105 + // but only if we aren't a single line edit field
1.1106 + if (IsSingleLineEditor()) {
1.1107 + return NS_OK;
1.1108 + }
1.1109 +
1.1110 + NS_ENSURE_STATE(mEditor);
1.1111 + dom::Element* body = mEditor->GetRoot();
1.1112 + NS_ENSURE_TRUE(body, NS_ERROR_NULL_POINTER);
1.1113 +
1.1114 + nsIContent* lastChild = body->GetLastChild();
1.1115 + // assuming CreateBogusNodeIfNeeded() has been called first
1.1116 + NS_ENSURE_TRUE(lastChild, NS_ERROR_NULL_POINTER);
1.1117 +
1.1118 + if (!lastChild->IsHTML(nsGkAtoms::br)) {
1.1119 + nsAutoTxnsConserveSelection dontSpazMySelection(mEditor);
1.1120 + nsCOMPtr<nsIDOMNode> domBody = do_QueryInterface(body);
1.1121 + return CreateMozBR(domBody, body->Length());
1.1122 + }
1.1123 +
1.1124 + // Check to see if the trailing BR is a former bogus node - this will have
1.1125 + // stuck around if we previously morphed a trailing node into a bogus node.
1.1126 + if (!mEditor->IsMozEditorBogusNode(lastChild)) {
1.1127 + return NS_OK;
1.1128 + }
1.1129 +
1.1130 + // Morph it back to a mozBR
1.1131 + lastChild->UnsetAttr(kNameSpaceID_None, kMOZEditorBogusNodeAttrAtom, false);
1.1132 + lastChild->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
1.1133 + NS_LITERAL_STRING("_moz"), true);
1.1134 + return NS_OK;
1.1135 +}
1.1136 +
1.1137 +nsresult
1.1138 +nsTextEditRules::CreateBogusNodeIfNeeded(nsISelection *aSelection)
1.1139 +{
1.1140 + NS_ENSURE_TRUE(aSelection, NS_ERROR_NULL_POINTER);
1.1141 + NS_ENSURE_TRUE(mEditor, NS_ERROR_NULL_POINTER);
1.1142 +
1.1143 + if (mBogusNode) {
1.1144 + // Let's not create more than one, ok?
1.1145 + return NS_OK;
1.1146 + }
1.1147 +
1.1148 + // tell rules system to not do any post-processing
1.1149 + nsAutoRules beginRulesSniffing(mEditor, EditAction::ignore, nsIEditor::eNone);
1.1150 +
1.1151 + nsCOMPtr<dom::Element> body = mEditor->GetRoot();
1.1152 + if (!body) {
1.1153 + // We don't even have a body yet, don't insert any bogus nodes at
1.1154 + // this point.
1.1155 + return NS_OK;
1.1156 + }
1.1157 +
1.1158 + // Now we've got the body element. Iterate over the body element's children,
1.1159 + // looking for editable content. If no editable content is found, insert the
1.1160 + // bogus node.
1.1161 + for (nsCOMPtr<nsIContent> bodyChild = body->GetFirstChild();
1.1162 + bodyChild;
1.1163 + bodyChild = bodyChild->GetNextSibling()) {
1.1164 + if (mEditor->IsMozEditorBogusNode(bodyChild) ||
1.1165 + !mEditor->IsEditable(body) || // XXX hoist out of the loop?
1.1166 + mEditor->IsEditable(bodyChild)) {
1.1167 + return NS_OK;
1.1168 + }
1.1169 + }
1.1170 +
1.1171 + // Skip adding the bogus node if body is read-only.
1.1172 + if (!mEditor->IsModifiableNode(body)) {
1.1173 + return NS_OK;
1.1174 + }
1.1175 +
1.1176 + // Create a br.
1.1177 + nsCOMPtr<dom::Element> newContent;
1.1178 + nsresult rv = mEditor->CreateHTMLContent(NS_LITERAL_STRING("br"), getter_AddRefs(newContent));
1.1179 + NS_ENSURE_SUCCESS(rv, rv);
1.1180 +
1.1181 + // set mBogusNode to be the newly created <br>
1.1182 + mBogusNode = do_QueryInterface(newContent);
1.1183 + NS_ENSURE_TRUE(mBogusNode, NS_ERROR_NULL_POINTER);
1.1184 +
1.1185 + // Give it a special attribute.
1.1186 + newContent->SetAttr(kNameSpaceID_None, kMOZEditorBogusNodeAttrAtom,
1.1187 + kMOZEditorBogusNodeValue, false);
1.1188 +
1.1189 + // Put the node in the document.
1.1190 + nsCOMPtr<nsIDOMNode> bodyNode = do_QueryInterface(body);
1.1191 + rv = mEditor->InsertNode(mBogusNode, bodyNode, 0);
1.1192 + NS_ENSURE_SUCCESS(rv, rv);
1.1193 +
1.1194 + // Set selection.
1.1195 + aSelection->CollapseNative(body, 0);
1.1196 + return NS_OK;
1.1197 +}
1.1198 +
1.1199 +
1.1200 +nsresult
1.1201 +nsTextEditRules::TruncateInsertionIfNeeded(Selection* aSelection,
1.1202 + const nsAString *aInString,
1.1203 + nsAString *aOutString,
1.1204 + int32_t aMaxLength,
1.1205 + bool *aTruncated)
1.1206 +{
1.1207 + if (!aSelection || !aInString || !aOutString) {return NS_ERROR_NULL_POINTER;}
1.1208 +
1.1209 + nsresult res = NS_OK;
1.1210 + *aOutString = *aInString;
1.1211 + if (aTruncated) {
1.1212 + *aTruncated = false;
1.1213 + }
1.1214 +
1.1215 + NS_ENSURE_STATE(mEditor);
1.1216 + if ((-1 != aMaxLength) && IsPlaintextEditor() && !mEditor->IsIMEComposing() )
1.1217 + {
1.1218 + // Get the current text length.
1.1219 + // Get the length of inString.
1.1220 + // Get the length of the selection.
1.1221 + // If selection is collapsed, it is length 0.
1.1222 + // Subtract the length of the selection from the len(doc)
1.1223 + // since we'll delete the selection on insert.
1.1224 + // This is resultingDocLength.
1.1225 + // Get old length of IME composing string
1.1226 + // which will be replaced by new one.
1.1227 + // If (resultingDocLength) is at or over max, cancel the insert
1.1228 + // If (resultingDocLength) + (length of input) > max,
1.1229 + // set aOutString to subset of inString so length = max
1.1230 + int32_t docLength;
1.1231 + res = mEditor->GetTextLength(&docLength);
1.1232 + if (NS_FAILED(res)) { return res; }
1.1233 +
1.1234 + int32_t start, end;
1.1235 + nsContentUtils::GetSelectionInTextControl(aSelection, mEditor->GetRoot(),
1.1236 + start, end);
1.1237 +
1.1238 + TextComposition* composition = mEditor->GetComposition();
1.1239 + int32_t oldCompStrLength = composition ? composition->String().Length() : 0;
1.1240 +
1.1241 + const int32_t selectionLength = end - start;
1.1242 + const int32_t resultingDocLength = docLength - selectionLength - oldCompStrLength;
1.1243 + if (resultingDocLength >= aMaxLength)
1.1244 + {
1.1245 + aOutString->Truncate();
1.1246 + if (aTruncated) {
1.1247 + *aTruncated = true;
1.1248 + }
1.1249 + }
1.1250 + else
1.1251 + {
1.1252 + int32_t inCount = aOutString->Length();
1.1253 + if (inCount + resultingDocLength > aMaxLength)
1.1254 + {
1.1255 + aOutString->Truncate(aMaxLength - resultingDocLength);
1.1256 + if (aTruncated) {
1.1257 + *aTruncated = true;
1.1258 + }
1.1259 + }
1.1260 + }
1.1261 + }
1.1262 + return res;
1.1263 +}
1.1264 +
1.1265 +void
1.1266 +nsTextEditRules::ResetIMETextPWBuf()
1.1267 +{
1.1268 + mPasswordIMEText.Truncate();
1.1269 +}
1.1270 +
1.1271 +void
1.1272 +nsTextEditRules::RemoveIMETextFromPWBuf(int32_t &aStart, nsAString *aIMEString)
1.1273 +{
1.1274 + MOZ_ASSERT(aIMEString);
1.1275 +
1.1276 + // initialize PasswordIME
1.1277 + if (mPasswordIMEText.IsEmpty()) {
1.1278 + mPasswordIMEIndex = aStart;
1.1279 + }
1.1280 + else {
1.1281 + // manage the password buffer
1.1282 + mPasswordText.Cut(mPasswordIMEIndex, mPasswordIMEText.Length());
1.1283 + aStart = mPasswordIMEIndex;
1.1284 + }
1.1285 +
1.1286 + mPasswordIMEText.Assign(*aIMEString);
1.1287 +}
1.1288 +
1.1289 +NS_IMETHODIMP nsTextEditRules::Notify(nsITimer *)
1.1290 +{
1.1291 + MOZ_ASSERT(mTimer);
1.1292 +
1.1293 + // Check whether our text editor's password flag was changed before this
1.1294 + // "hide password character" timer actually fires.
1.1295 + nsresult res = IsPasswordEditor() ? HideLastPWInput() : NS_OK;
1.1296 + ASSERT_PASSWORD_LENGTHS_EQUAL();
1.1297 + mLastLength = 0;
1.1298 + return res;
1.1299 +}
1.1300 +
1.1301 +nsresult nsTextEditRules::HideLastPWInput() {
1.1302 + if (!mLastLength) {
1.1303 + // Special case, we're trying to replace a range that no longer exists
1.1304 + return NS_OK;
1.1305 + }
1.1306 +
1.1307 + nsAutoString hiddenText;
1.1308 + FillBufWithPWChars(&hiddenText, mLastLength);
1.1309 +
1.1310 + NS_ENSURE_STATE(mEditor);
1.1311 + nsRefPtr<Selection> selection = mEditor->GetSelection();
1.1312 + NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
1.1313 + int32_t start, end;
1.1314 + nsContentUtils::GetSelectionInTextControl(selection, mEditor->GetRoot(),
1.1315 + start, end);
1.1316 +
1.1317 + nsCOMPtr<nsIDOMNode> selNode = GetTextNode(selection, mEditor);
1.1318 + NS_ENSURE_TRUE(selNode, NS_OK);
1.1319 +
1.1320 + nsCOMPtr<nsIDOMCharacterData> nodeAsText(do_QueryInterface(selNode));
1.1321 + NS_ENSURE_TRUE(nodeAsText, NS_OK);
1.1322 +
1.1323 + nodeAsText->ReplaceData(mLastStart, mLastLength, hiddenText);
1.1324 + selection->Collapse(selNode, start);
1.1325 + if (start != end)
1.1326 + selection->Extend(selNode, end);
1.1327 + return NS_OK;
1.1328 +}
1.1329 +
1.1330 +// static
1.1331 +void
1.1332 +nsTextEditRules::FillBufWithPWChars(nsAString *aOutString, int32_t aLength)
1.1333 +{
1.1334 + MOZ_ASSERT(aOutString);
1.1335 +
1.1336 + // change the output to the platform password character
1.1337 + char16_t passwordChar = LookAndFeel::GetPasswordCharacter();
1.1338 +
1.1339 + int32_t i;
1.1340 + aOutString->Truncate();
1.1341 + for (i=0; i < aLength; i++)
1.1342 + aOutString->Append(passwordChar);
1.1343 +}
1.1344 +
1.1345 +
1.1346 +///////////////////////////////////////////////////////////////////////////
1.1347 +// CreateMozBR: put a BR node with moz attribute at {aNode, aOffset}
1.1348 +//
1.1349 +nsresult
1.1350 +nsTextEditRules::CreateMozBR(nsIDOMNode* inParent, int32_t inOffset,
1.1351 + nsIDOMNode** outBRNode)
1.1352 +{
1.1353 + NS_ENSURE_TRUE(inParent, NS_ERROR_NULL_POINTER);
1.1354 +
1.1355 + nsCOMPtr<nsIDOMNode> brNode;
1.1356 + NS_ENSURE_STATE(mEditor);
1.1357 + nsresult res = mEditor->CreateBR(inParent, inOffset, address_of(brNode));
1.1358 + NS_ENSURE_SUCCESS(res, res);
1.1359 +
1.1360 + // give it special moz attr
1.1361 + nsCOMPtr<nsIDOMElement> brElem = do_QueryInterface(brNode);
1.1362 + if (brElem) {
1.1363 + res = mEditor->SetAttribute(brElem, NS_LITERAL_STRING("type"), NS_LITERAL_STRING("_moz"));
1.1364 + NS_ENSURE_SUCCESS(res, res);
1.1365 + }
1.1366 +
1.1367 + if (outBRNode) {
1.1368 + brNode.forget(outBRNode);
1.1369 + }
1.1370 + return NS_OK;
1.1371 +}
1.1372 +
1.1373 +NS_IMETHODIMP
1.1374 +nsTextEditRules::DocumentModified()
1.1375 +{
1.1376 + return NS_ERROR_NOT_IMPLEMENTED;
1.1377 +}
