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gecko/editor/libeditor/text/nsPlaintextEditor.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):
* Daniel Glazman <glazman@netscape.com>
* Mats Palmgren <matspal@gmail.com>
*
* 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 "nsPlaintextEditor.h"
#include "nsCaret.h"
#include "nsTextEditUtils.h"
#include "nsTextEditRules.h"
#include "nsIEditActionListener.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsIDocument.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMKeyEvent.h"
#include "nsISelection.h"
#include "nsISelectionPrivate.h"
#include "nsISelectionController.h"
#include "nsGUIEvent.h"
#include "nsCRT.h"
#include "nsIEnumerator.h"
#include "nsIContent.h"
#include "nsIContentIterator.h"
#include "nsIDOMRange.h"
#include "nsISupportsArray.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsIDocumentEncoder.h"
#include "nsIPresShell.h"
#include "nsISupportsPrimitives.h"
#include "nsReadableUtils.h"
// Misc
#include "nsEditorUtils.h" // nsAutoEditBatch, nsAutoRules
#include "nsUnicharUtils.h"
#include "nsContentCID.h"
#include "nsInternetCiter.h"
#include "nsEventDispatcher.h"
#include "nsGkAtoms.h"
#include "nsDebug.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/Element.h"
// Drag & Drop, Clipboard
#include "nsIClipboard.h"
#include "nsITransferable.h"
#include "nsCopySupport.h"
#include "mozilla/FunctionTimer.h"
using namespace mozilla;
nsPlaintextEditor::nsPlaintextEditor()
: nsEditor()
, mRules(nsnull)
, mWrapToWindow(false)
, mWrapColumn(0)
, mMaxTextLength(-1)
, mInitTriggerCounter(0)
, mNewlineHandling(nsIPlaintextEditor::eNewlinesPasteToFirst)
#ifdef XP_WIN
, mCaretStyle(1)
#else
, mCaretStyle(0)
#endif
{
}
nsPlaintextEditor::~nsPlaintextEditor()
{
// Remove event listeners. Note that if we had an HTML editor,
// it installed its own instead of these
RemoveEventListeners();
if (mRules)
mRules->DetachEditor();
}
NS_IMPL_CYCLE_COLLECTION_CLASS(nsPlaintextEditor)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(nsPlaintextEditor, nsEditor)
if (tmp->mRules)
tmp->mRules->DetachEditor();
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mRules)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsPlaintextEditor, nsEditor)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mRules)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_ADDREF_INHERITED(nsPlaintextEditor, nsEditor)
NS_IMPL_RELEASE_INHERITED(nsPlaintextEditor, nsEditor)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsPlaintextEditor)
NS_INTERFACE_MAP_ENTRY(nsIPlaintextEditor)
NS_INTERFACE_MAP_ENTRY(nsIEditorMailSupport)
NS_INTERFACE_MAP_END_INHERITING(nsEditor)
NS_IMETHODIMP nsPlaintextEditor::Init(nsIDOMDocument *aDoc,
nsIContent *aRoot,
nsISelectionController *aSelCon,
PRUint32 aFlags)
{
NS_TIME_FUNCTION;
NS_PRECONDITION(aDoc, "bad arg");
NS_ENSURE_TRUE(aDoc, NS_ERROR_NULL_POINTER);
nsresult res = NS_OK, rulesRes = NS_OK;
if (1)
{
// block to scope nsAutoEditInitRulesTrigger
nsAutoEditInitRulesTrigger rulesTrigger(this, rulesRes);
// Init the base editor
res = nsEditor::Init(aDoc, aRoot, aSelCon, aFlags);
}
// check the "single line editor newline handling"
// and "caret behaviour in selection" prefs
GetDefaultEditorPrefs(mNewlineHandling, mCaretStyle);
NS_ENSURE_SUCCESS(rulesRes, rulesRes);
return res;
}
static PRInt32 sNewlineHandlingPref = -1,
sCaretStylePref = -1;
static int
EditorPrefsChangedCallback(const char *aPrefName, void *)
{
if (nsCRT::strcmp(aPrefName, "editor.singleLine.pasteNewlines") == 0) {
sNewlineHandlingPref =
Preferences::GetInt("editor.singleLine.pasteNewlines",
nsIPlaintextEditor::eNewlinesPasteToFirst);
} else if (nsCRT::strcmp(aPrefName, "layout.selection.caret_style") == 0) {
sCaretStylePref = Preferences::GetInt("layout.selection.caret_style",
#ifdef XP_WIN
1);
if (sCaretStylePref == 0)
sCaretStylePref = 1;
#else
0);
#endif
}
return 0;
}
// static
void
nsPlaintextEditor::GetDefaultEditorPrefs(PRInt32 &aNewlineHandling,
PRInt32 &aCaretStyle)
{
if (sNewlineHandlingPref == -1) {
Preferences::RegisterCallback(EditorPrefsChangedCallback,
"editor.singleLine.pasteNewlines");
EditorPrefsChangedCallback("editor.singleLine.pasteNewlines", nsnull);
Preferences::RegisterCallback(EditorPrefsChangedCallback,
"layout.selection.caret_style");
EditorPrefsChangedCallback("layout.selection.caret_style", nsnull);
}
aNewlineHandling = sNewlineHandlingPref;
aCaretStyle = sCaretStylePref;
}
void
nsPlaintextEditor::BeginEditorInit()
{
mInitTriggerCounter++;
}
nsresult
nsPlaintextEditor::EndEditorInit()
{
nsresult res = NS_OK;
NS_PRECONDITION(mInitTriggerCounter > 0, "ended editor init before we began?");
mInitTriggerCounter--;
if (mInitTriggerCounter == 0)
{
res = InitRules();
if (NS_SUCCEEDED(res)) {
// Throw away the old transaction manager if this is not the first time that
// we're initializing the editor.
EnableUndo(false);
EnableUndo(true);
}
}
return res;
}
NS_IMETHODIMP
nsPlaintextEditor::SetDocumentCharacterSet(const nsACString& characterSet)
{
nsresult rv = nsEditor::SetDocumentCharacterSet(characterSet);
NS_ENSURE_SUCCESS(rv, rv);
// Update META charset element.
nsCOMPtr<nsIDOMDocument> domdoc = GetDOMDocument();
NS_ENSURE_TRUE(domdoc, NS_ERROR_NOT_INITIALIZED);
if (UpdateMetaCharset(domdoc, characterSet)) {
return NS_OK;
}
nsCOMPtr<nsIDOMNodeList> headList;
rv = domdoc->GetElementsByTagName(NS_LITERAL_STRING("head"), getter_AddRefs(headList));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(headList, NS_OK);
nsCOMPtr<nsIDOMNode> headNode;
headList->Item(0, getter_AddRefs(headNode));
NS_ENSURE_TRUE(headNode, NS_OK);
// Create a new meta charset tag
nsCOMPtr<nsIDOMNode> resultNode;
rv = CreateNode(NS_LITERAL_STRING("meta"), headNode, 0, getter_AddRefs(resultNode));
NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
NS_ENSURE_TRUE(resultNode, NS_OK);
// Set attributes to the created element
if (characterSet.IsEmpty()) {
return NS_OK;
}
nsCOMPtr<dom::Element> metaElement = do_QueryInterface(resultNode);
if (!metaElement) {
return NS_OK;
}
// not undoable, undo should undo CreateNode
metaElement->SetAttr(kNameSpaceID_None, nsGkAtoms::httpEquiv,
NS_LITERAL_STRING("Content-Type"), true);
metaElement->SetAttr(kNameSpaceID_None, nsGkAtoms::content,
NS_LITERAL_STRING("text/html;charset=") +
NS_ConvertASCIItoUTF16(characterSet),
true);
return NS_OK;
}
bool
nsPlaintextEditor::UpdateMetaCharset(nsIDOMDocument* aDocument,
const nsACString& aCharacterSet)
{
MOZ_ASSERT(aDocument);
// get a list of META tags
nsCOMPtr<nsIDOMNodeList> metaList;
nsresult rv = aDocument->GetElementsByTagName(NS_LITERAL_STRING("meta"),
getter_AddRefs(metaList));
NS_ENSURE_SUCCESS(rv, false);
NS_ENSURE_TRUE(metaList, false);
PRUint32 listLength = 0;
metaList->GetLength(&listLength);
for (PRUint32 i = 0; i < listLength; ++i) {
nsCOMPtr<nsIContent> metaNode = metaList->GetNodeAt(i);
MOZ_ASSERT(metaNode);
if (!metaNode->IsElement()) {
continue;
}
nsAutoString currentValue;
metaNode->GetAttr(kNameSpaceID_None, nsGkAtoms::httpEquiv, currentValue);
if (!FindInReadable(NS_LITERAL_STRING("content-type"),
currentValue,
nsCaseInsensitiveStringComparator())) {
continue;
}
metaNode->GetAttr(kNameSpaceID_None, nsGkAtoms::content, currentValue);
NS_NAMED_LITERAL_STRING(charsetEquals, "charset=");
nsAString::const_iterator originalStart, start, end;
originalStart = currentValue.BeginReading(start);
currentValue.EndReading(end);
if (!FindInReadable(charsetEquals, start, end,
nsCaseInsensitiveStringComparator())) {
continue;
}
// set attribute to <original prefix> charset=text/html
nsCOMPtr<nsIDOMElement> metaElement = do_QueryInterface(metaNode);
MOZ_ASSERT(metaElement);
rv = nsEditor::SetAttribute(metaElement, NS_LITERAL_STRING("content"),
Substring(originalStart, start) +
charsetEquals +
NS_ConvertASCIItoUTF16(aCharacterSet));
return NS_SUCCEEDED(rv);
}
return false;
}
NS_IMETHODIMP nsPlaintextEditor::InitRules()
{
// instantiate the rules for this text editor
mRules = new nsTextEditRules();
return mRules->Init(this);
}
NS_IMETHODIMP
nsPlaintextEditor::GetIsDocumentEditable(bool *aIsDocumentEditable)
{
NS_ENSURE_ARG_POINTER(aIsDocumentEditable);
nsCOMPtr<nsIDOMDocument> doc = GetDOMDocument();
*aIsDocumentEditable = doc && IsModifiable();
return NS_OK;
}
bool nsPlaintextEditor::IsModifiable()
{
return !IsReadonly();
}
nsresult
nsPlaintextEditor::HandleKeyPressEvent(nsIDOMKeyEvent* aKeyEvent)
{
// NOTE: When you change this method, you should also change:
// * editor/libeditor/text/tests/test_texteditor_keyevent_handling.html
// * editor/libeditor/html/tests/test_htmleditor_keyevent_handling.html
//
// And also when you add new key handling, you need to change the subclass's
// HandleKeyPressEvent()'s switch statement.
if (IsReadonly() || IsDisabled()) {
// When we're not editable, the events handled on nsEditor.
return nsEditor::HandleKeyPressEvent(aKeyEvent);
}
nsKeyEvent* nativeKeyEvent = GetNativeKeyEvent(aKeyEvent);
NS_ENSURE_TRUE(nativeKeyEvent, NS_ERROR_UNEXPECTED);
NS_ASSERTION(nativeKeyEvent->message == NS_KEY_PRESS,
"HandleKeyPressEvent gets non-keypress event");
switch (nativeKeyEvent->keyCode) {
case nsIDOMKeyEvent::DOM_VK_META:
case nsIDOMKeyEvent::DOM_VK_SHIFT:
case nsIDOMKeyEvent::DOM_VK_CONTROL:
case nsIDOMKeyEvent::DOM_VK_ALT:
case nsIDOMKeyEvent::DOM_VK_BACK_SPACE:
case nsIDOMKeyEvent::DOM_VK_DELETE:
// These keys are handled on nsEditor
return nsEditor::HandleKeyPressEvent(aKeyEvent);
case nsIDOMKeyEvent::DOM_VK_TAB: {
if (IsTabbable()) {
return NS_OK; // let it be used for focus switching
}
if (nativeKeyEvent->IsShift() || nativeKeyEvent->IsControl() ||
nativeKeyEvent->IsAlt() || nativeKeyEvent->IsMeta()) {
return NS_OK;
}
// else we insert the tab straight through
aKeyEvent->PreventDefault();
return TypedText(NS_LITERAL_STRING("\t"), eTypedText);
}
case nsIDOMKeyEvent::DOM_VK_RETURN:
case nsIDOMKeyEvent::DOM_VK_ENTER:
if (IsSingleLineEditor() || nativeKeyEvent->IsControl() ||
nativeKeyEvent->IsAlt() || nativeKeyEvent->IsMeta()) {
return NS_OK;
}
aKeyEvent->PreventDefault();
return TypedText(EmptyString(), eTypedBreak);
}
// NOTE: On some keyboard layout, some characters are inputted with Control
// key or Alt key, but at that time, widget sets FALSE to these keys.
if (nativeKeyEvent->charCode == 0 || nativeKeyEvent->IsControl() ||
nativeKeyEvent->IsAlt() || nativeKeyEvent->IsMeta()) {
// we don't PreventDefault() here or keybindings like control-x won't work
return NS_OK;
}
aKeyEvent->PreventDefault();
nsAutoString str(nativeKeyEvent->charCode);
return TypedText(str, eTypedText);
}
/* This routine is needed to provide a bottleneck for typing for logging
purposes. Can't use HandleKeyPress() (above) for that since it takes
a nsIDOMKeyEvent* parameter. So instead we pass enough info through
to TypedText() to determine what action to take, but without passing
an event.
*/
NS_IMETHODIMP nsPlaintextEditor::TypedText(const nsAString& aString,
PRInt32 aAction)
{
nsAutoPlaceHolderBatch batch(this, nsGkAtoms::TypingTxnName);
switch (aAction)
{
case eTypedText:
{
return InsertText(aString);
}
case eTypedBreak:
{
return InsertLineBreak();
}
}
return NS_ERROR_FAILURE;
}
nsresult
nsPlaintextEditor::CreateBRImpl(nsCOMPtr<nsIDOMNode>* aInOutParent,
PRInt32* aInOutOffset,
nsCOMPtr<nsIDOMNode>* outBRNode,
EDirection aSelect)
{
NS_ENSURE_TRUE(aInOutParent && *aInOutParent && aInOutOffset && outBRNode, NS_ERROR_NULL_POINTER);
*outBRNode = nsnull;
nsresult res;
// we need to insert a br. unfortunately, we may have to split a text node to do it.
nsCOMPtr<nsIDOMNode> node = *aInOutParent;
PRInt32 theOffset = *aInOutOffset;
nsCOMPtr<nsIDOMCharacterData> nodeAsText = do_QueryInterface(node);
NS_NAMED_LITERAL_STRING(brType, "br");
nsCOMPtr<nsIDOMNode> brNode;
if (nodeAsText)
{
nsCOMPtr<nsIDOMNode> tmp;
PRInt32 offset;
PRUint32 len;
nodeAsText->GetLength(&len);
GetNodeLocation(node, address_of(tmp), &offset);
NS_ENSURE_TRUE(tmp, NS_ERROR_FAILURE);
if (!theOffset)
{
// we are already set to go
}
else if (theOffset == (PRInt32)len)
{
// update offset to point AFTER the text node
offset++;
}
else
{
// split the text node
res = SplitNode(node, theOffset, getter_AddRefs(tmp));
NS_ENSURE_SUCCESS(res, res);
res = GetNodeLocation(node, address_of(tmp), &offset);
NS_ENSURE_SUCCESS(res, res);
}
// create br
res = CreateNode(brType, tmp, offset, getter_AddRefs(brNode));
NS_ENSURE_SUCCESS(res, res);
*aInOutParent = tmp;
*aInOutOffset = offset+1;
}
else
{
res = CreateNode(brType, node, theOffset, getter_AddRefs(brNode));
NS_ENSURE_SUCCESS(res, res);
(*aInOutOffset)++;
}
*outBRNode = brNode;
if (*outBRNode && (aSelect != eNone))
{
nsCOMPtr<nsIDOMNode> parent;
PRInt32 offset;
res = GetNodeLocation(*outBRNode, address_of(parent), &offset);
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr<nsISelection> selection;
res = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr<nsISelectionPrivate> selPriv(do_QueryInterface(selection));
if (aSelect == eNext)
{
// position selection after br
selPriv->SetInterlinePosition(true);
res = selection->Collapse(parent, offset+1);
}
else if (aSelect == ePrevious)
{
// position selection before br
selPriv->SetInterlinePosition(true);
res = selection->Collapse(parent, offset);
}
}
return NS_OK;
}
NS_IMETHODIMP nsPlaintextEditor::CreateBR(nsIDOMNode *aNode, PRInt32 aOffset, nsCOMPtr<nsIDOMNode> *outBRNode, EDirection aSelect)
{
nsCOMPtr<nsIDOMNode> parent = aNode;
PRInt32 offset = aOffset;
return CreateBRImpl(address_of(parent), &offset, outBRNode, aSelect);
}
nsresult
nsPlaintextEditor::InsertBR(nsCOMPtr<nsIDOMNode>* outBRNode)
{
NS_ENSURE_TRUE(outBRNode, NS_ERROR_NULL_POINTER);
*outBRNode = nsnull;
// calling it text insertion to trigger moz br treatment by rules
nsAutoRules beginRulesSniffing(this, kOpInsertText, nsIEditor::eNext);
nsCOMPtr<nsISelection> selection;
nsresult res = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(res, res);
bool bCollapsed;
res = selection->GetIsCollapsed(&bCollapsed);
NS_ENSURE_SUCCESS(res, res);
if (!bCollapsed)
{
res = DeleteSelection(nsIEditor::eNone);
NS_ENSURE_SUCCESS(res, res);
}
nsCOMPtr<nsIDOMNode> selNode;
PRInt32 selOffset;
res = GetStartNodeAndOffset(selection, getter_AddRefs(selNode), &selOffset);
NS_ENSURE_SUCCESS(res, res);
res = CreateBR(selNode, selOffset, outBRNode);
NS_ENSURE_SUCCESS(res, res);
// position selection after br
res = GetNodeLocation(*outBRNode, address_of(selNode), &selOffset);
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr<nsISelectionPrivate> selPriv(do_QueryInterface(selection));
selPriv->SetInterlinePosition(true);
return selection->Collapse(selNode, selOffset+1);
}
nsresult
nsPlaintextEditor::GetTextSelectionOffsets(nsISelection *aSelection,
PRUint32 &aOutStartOffset,
PRUint32 &aOutEndOffset)
{
NS_ASSERTION(aSelection, "null selection");
nsresult rv;
nsCOMPtr<nsIDOMNode> startNode, endNode;
PRInt32 startNodeOffset, endNodeOffset;
aSelection->GetAnchorNode(getter_AddRefs(startNode));
aSelection->GetAnchorOffset(&startNodeOffset);
aSelection->GetFocusNode(getter_AddRefs(endNode));
aSelection->GetFocusOffset(&endNodeOffset);
dom::Element *rootElement = GetRoot();
nsCOMPtr<nsIDOMNode> rootNode = do_QueryInterface(rootElement);
NS_ENSURE_TRUE(rootNode, NS_ERROR_NULL_POINTER);
PRInt32 startOffset = -1;
PRInt32 endOffset = -1;
nsCOMPtr<nsIContentIterator> iter =
do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
#ifdef NS_DEBUG
PRInt32 nodeCount = 0; // only needed for the assertions below
#endif
PRUint32 totalLength = 0;
iter->Init(rootElement);
for (; !iter->IsDone() && (startOffset == -1 || endOffset == -1); iter->Next()) {
nsCOMPtr<nsIDOMNode> currentNode = do_QueryInterface(iter->GetCurrentNode());
nsCOMPtr<nsIDOMCharacterData> textNode = do_QueryInterface(currentNode);
if (textNode) {
// Note that sometimes we have an empty #text-node as start/endNode,
// which we regard as not editable because the frame width == 0,
// see nsEditor::IsEditable().
bool editable = IsEditable(currentNode);
if (currentNode == startNode) {
startOffset = totalLength + (editable ? startNodeOffset : 0);
}
if (currentNode == endNode) {
endOffset = totalLength + (editable ? endNodeOffset : 0);
}
if (editable) {
PRUint32 length;
textNode->GetLength(&length);
totalLength += length;
}
}
#ifdef NS_DEBUG
// The post content iterator might return the parent node (which is the
// editor's root node) as the last item. Don't count the root node itself
// as one of its children!
if (!SameCOMIdentity(currentNode, rootNode)) {
++nodeCount;
}
#endif
}
if (endOffset == -1) {
NS_ASSERTION(endNode == rootNode, "failed to find the end node");
NS_ASSERTION(IsPasswordEditor() ||
(endNodeOffset == nodeCount-1 || endNodeOffset == 0),
"invalid end node offset");
endOffset = endNodeOffset == 0 ? 0 : totalLength;
}
if (startOffset == -1) {
NS_ASSERTION(startNode == rootNode, "failed to find the start node");
NS_ASSERTION(startNodeOffset == nodeCount-1 || startNodeOffset == 0,
"invalid start node offset");
startOffset = startNodeOffset == 0 ? 0 : totalLength;
}
// Make sure aOutStartOffset <= aOutEndOffset.
if (startOffset <= endOffset) {
aOutStartOffset = startOffset;
aOutEndOffset = endOffset;
}
else {
aOutStartOffset = endOffset;
aOutEndOffset = startOffset;
}
return NS_OK;
}
nsresult
nsPlaintextEditor::ExtendSelectionForDelete(nsISelection *aSelection,
nsIEditor::EDirection *aAction)
{
nsresult result;
bool bCollapsed;
result = aSelection->GetIsCollapsed(&bCollapsed);
NS_ENSURE_SUCCESS(result, result);
if (*aAction == eNextWord || *aAction == ePreviousWord
|| (*aAction == eNext && bCollapsed)
|| (*aAction == ePrevious && bCollapsed)
|| *aAction == eToBeginningOfLine || *aAction == eToEndOfLine)
{
nsCOMPtr<nsISelectionController> selCont;
GetSelectionController(getter_AddRefs(selCont));
NS_ENSURE_TRUE(selCont, NS_ERROR_NO_INTERFACE);
switch (*aAction)
{
case eNextWord:
result = selCont->WordExtendForDelete(true);
// DeleteSelectionImpl doesn't handle these actions
// because it's inside batching, so don't confuse it:
*aAction = eNone;
break;
case ePreviousWord:
result = selCont->WordExtendForDelete(false);
*aAction = eNone;
break;
case eNext:
result = selCont->CharacterExtendForDelete();
// Don't set aAction to eNone (see Bug 502259)
break;
case ePrevious: {
// Only extend the selection where the selection is after a UTF-16
// surrogate pair. For other cases we don't want to do that, in order
// to make sure that pressing backspace will only delete the last
// typed character.
nsCOMPtr<nsIDOMNode> node;
PRInt32 offset;
result = GetStartNodeAndOffset(aSelection, getter_AddRefs(node), &offset);
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(node, NS_ERROR_FAILURE);
if (IsTextNode(node)) {
nsCOMPtr<nsIDOMCharacterData> charData = do_QueryInterface(node);
if (charData) {
nsAutoString data;
result = charData->GetData(data);
NS_ENSURE_SUCCESS(result, result);
if (offset > 1 &&
NS_IS_LOW_SURROGATE(data[offset - 1]) &&
NS_IS_HIGH_SURROGATE(data[offset - 2])) {
result = selCont->CharacterExtendForBackspace();
}
}
}
break;
}
case eToBeginningOfLine:
selCont->IntraLineMove(true, false); // try to move to end
result = selCont->IntraLineMove(false, true); // select to beginning
*aAction = eNone;
break;
case eToEndOfLine:
result = selCont->IntraLineMove(true, true);
*aAction = eNext;
break;
default: // avoid several compiler warnings
result = NS_OK;
break;
}
}
return result;
}
NS_IMETHODIMP nsPlaintextEditor::DeleteSelection(nsIEditor::EDirection aAction)
{
if (!mRules) { return NS_ERROR_NOT_INITIALIZED; }
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
nsresult result;
HandlingTrustedAction trusted(this, aAction != eNone);
// delete placeholder txns merge.
nsAutoPlaceHolderBatch batch(this, nsGkAtoms::DeleteTxnName);
nsAutoRules beginRulesSniffing(this, kOpDeleteSelection, aAction);
// pre-process
nsCOMPtr<nsISelection> selection;
result = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
// If there is an existing selection when an extended delete is requested,
// platforms that use "caret-style" caret positioning collapse the
// selection to the start and then create a new selection.
// Platforms that use "selection-style" caret positioning just delete the
// existing selection without extending it.
bool bCollapsed;
result = selection->GetIsCollapsed(&bCollapsed);
NS_ENSURE_SUCCESS(result, result);
if (!bCollapsed &&
(aAction == eNextWord || aAction == ePreviousWord ||
aAction == eToBeginningOfLine || aAction == eToEndOfLine))
{
if (mCaretStyle == 1)
{
result = selection->CollapseToStart();
NS_ENSURE_SUCCESS(result, result);
}
else
{
aAction = eNone;
}
}
nsTextRulesInfo ruleInfo(nsTextEditRules::kDeleteSelection);
ruleInfo.collapsedAction = aAction;
bool cancel, handled;
result = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
NS_ENSURE_SUCCESS(result, result);
if (!cancel && !handled)
{
result = DeleteSelectionImpl(aAction);
}
if (!cancel)
{
// post-process
result = mRules->DidDoAction(selection, &ruleInfo, result);
}
return result;
}
NS_IMETHODIMP nsPlaintextEditor::InsertText(const nsAString &aStringToInsert)
{
if (!mRules) { return NS_ERROR_NOT_INITIALIZED; }
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
PRInt32 theAction = nsTextEditRules::kInsertText;
PRInt32 opID = kOpInsertText;
if (mInIMEMode)
{
theAction = nsTextEditRules::kInsertTextIME;
opID = kOpInsertIMEText;
}
nsAutoPlaceHolderBatch batch(this, nsnull);
nsAutoRules beginRulesSniffing(this, opID, nsIEditor::eNext);
// pre-process
nsCOMPtr<nsISelection> selection;
nsresult result = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
nsAutoString resultString;
// XXX can we trust instring to outlive ruleInfo,
// XXX and ruleInfo not to refer to instring in its dtor?
//nsAutoString instring(aStringToInsert);
nsTextRulesInfo ruleInfo(theAction);
ruleInfo.inString = &aStringToInsert;
ruleInfo.outString = &resultString;
ruleInfo.maxLength = mMaxTextLength;
bool cancel, handled;
result = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
NS_ENSURE_SUCCESS(result, result);
if (!cancel && !handled)
{
// we rely on rules code for now - no default implementation
}
if (!cancel)
{
// post-process
result = mRules->DidDoAction(selection, &ruleInfo, result);
}
return result;
}
NS_IMETHODIMP nsPlaintextEditor::InsertLineBreak()
{
if (!mRules) { return NS_ERROR_NOT_INITIALIZED; }
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
nsAutoEditBatch beginBatching(this);
nsAutoRules beginRulesSniffing(this, kOpInsertBreak, nsIEditor::eNext);
// pre-process
nsCOMPtr<nsISelection> selection;
nsresult res;
res = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
// Batching the selection and moving nodes out from under the caret causes
// caret turds. Ask the shell to invalidate the caret now to avoid the turds.
nsCOMPtr<nsIPresShell> shell = GetPresShell();
NS_ENSURE_TRUE(shell, NS_ERROR_NOT_INITIALIZED);
shell->MaybeInvalidateCaretPosition();
nsTextRulesInfo ruleInfo(nsTextEditRules::kInsertBreak);
ruleInfo.maxLength = mMaxTextLength;
bool cancel, handled;
res = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
NS_ENSURE_SUCCESS(res, res);
if (!cancel && !handled)
{
// get the (collapsed) selection location
nsCOMPtr<nsIDOMNode> selNode;
PRInt32 selOffset;
res = GetStartNodeAndOffset(selection, getter_AddRefs(selNode), &selOffset);
NS_ENSURE_SUCCESS(res, res);
// don't put text in places that can't have it
if (!IsTextNode(selNode) && !CanContainTag(selNode, nsGkAtoms::textTagName)) {
return NS_ERROR_FAILURE;
}
// we need to get the doc
nsCOMPtr<nsIDOMDocument> doc = GetDOMDocument();
NS_ENSURE_TRUE(doc, NS_ERROR_NOT_INITIALIZED);
// don't spaz my selection in subtransactions
nsAutoTxnsConserveSelection dontSpazMySelection(this);
// insert a linefeed character
res = InsertTextImpl(NS_LITERAL_STRING("\n"), address_of(selNode),
&selOffset, doc);
if (!selNode) res = NS_ERROR_NULL_POINTER; // don't return here, so DidDoAction is called
if (NS_SUCCEEDED(res))
{
// set the selection to the correct location
res = selection->Collapse(selNode, selOffset);
if (NS_SUCCEEDED(res))
{
// see if we're at the end of the editor range
nsCOMPtr<nsIDOMNode> endNode;
PRInt32 endOffset;
res = GetEndNodeAndOffset(selection, getter_AddRefs(endNode), &endOffset);
if (NS_SUCCEEDED(res) && endNode == selNode && endOffset == selOffset)
{
// SetInterlinePosition(true) means we want the caret to stick to the content on the "right".
// We want the caret to stick to whatever is past the break. This is
// because the break is on the same line we were on, but the next content
// will be on the following line.
nsCOMPtr<nsISelectionPrivate> selPriv(do_QueryInterface(selection));
selPriv->SetInterlinePosition(true);
}
}
}
}
if (!cancel)
{
// post-process, always called if WillInsertBreak didn't return cancel==true
res = mRules->DidDoAction(selection, &ruleInfo, res);
}
return res;
}
nsresult
nsPlaintextEditor::BeginIMEComposition()
{
NS_ENSURE_TRUE(!mInIMEMode, NS_OK);
if (IsPasswordEditor()) {
NS_ENSURE_TRUE(mRules, NS_ERROR_NULL_POINTER);
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
nsTextEditRules *textEditRules =
static_cast<nsTextEditRules*>(mRules.get());
textEditRules->ResetIMETextPWBuf();
}
return nsEditor::BeginIMEComposition();
}
nsresult
nsPlaintextEditor::UpdateIMEComposition(const nsAString& aCompositionString,
nsIPrivateTextRangeList* aTextRangeList)
{
NS_ABORT_IF_FALSE(aTextRangeList, "aTextRangeList must not be NULL");
nsCOMPtr<nsIPresShell> ps = GetPresShell();
NS_ENSURE_TRUE(ps, NS_ERROR_NOT_INITIALIZED);
nsCOMPtr<nsISelection> selection;
nsresult rv = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(rv, rv);
nsRefPtr<nsCaret> caretP = ps->GetCaret();
// Update information of clauses in the new composition string.
// This will be refered by followed methods.
mIMETextRangeList = aTextRangeList;
// We set mIsIMEComposing properly.
SetIsIMEComposing();
{
nsAutoPlaceHolderBatch batch(this, nsGkAtoms::IMETxnName);
rv = InsertText(aCompositionString);
mIMEBufferLength = aCompositionString.Length();
if (caretP) {
caretP->SetCaretDOMSelection(selection);
}
}
// If still composing, we should fire input event via observer.
// Note that if committed, we don't need to notify it since it will be
// notified at followed compositionend event.
// NOTE: We must notify after the auto batch will be gone.
if (mIsIMEComposing) {
NotifyEditorObservers();
}
return rv;
}
already_AddRefed<nsIContent>
nsPlaintextEditor::GetInputEventTargetContent()
{
nsCOMPtr<nsIContent> target = do_QueryInterface(mEventTarget);
return target.forget();
}
NS_IMETHODIMP
nsPlaintextEditor::GetDocumentIsEmpty(bool *aDocumentIsEmpty)
{
NS_ENSURE_TRUE(aDocumentIsEmpty, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(mRules, NS_ERROR_NOT_INITIALIZED);
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
return mRules->DocumentIsEmpty(aDocumentIsEmpty);
}
NS_IMETHODIMP
nsPlaintextEditor::GetTextLength(PRInt32 *aCount)
{
NS_ASSERTION(aCount, "null pointer");
// initialize out params
*aCount = 0;
// special-case for empty document, to account for the bogus node
bool docEmpty;
nsresult rv = GetDocumentIsEmpty(&docEmpty);
NS_ENSURE_SUCCESS(rv, rv);
if (docEmpty)
return NS_OK;
dom::Element *rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIContentIterator> iter =
do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 totalLength = 0;
iter->Init(rootElement);
for (; !iter->IsDone(); iter->Next()) {
nsCOMPtr<nsIDOMNode> currentNode = do_QueryInterface(iter->GetCurrentNode());
nsCOMPtr<nsIDOMCharacterData> textNode = do_QueryInterface(currentNode);
if (textNode && IsEditable(currentNode)) {
PRUint32 length;
textNode->GetLength(&length);
totalLength += length;
}
}
*aCount = totalLength;
return NS_OK;
}
NS_IMETHODIMP
nsPlaintextEditor::SetMaxTextLength(PRInt32 aMaxTextLength)
{
mMaxTextLength = aMaxTextLength;
return NS_OK;
}
NS_IMETHODIMP
nsPlaintextEditor::GetMaxTextLength(PRInt32* aMaxTextLength)
{
NS_ENSURE_TRUE(aMaxTextLength, NS_ERROR_INVALID_POINTER);
*aMaxTextLength = mMaxTextLength;
return NS_OK;
}
//
// Get the wrap width
//
NS_IMETHODIMP
nsPlaintextEditor::GetWrapWidth(PRInt32 *aWrapColumn)
{
NS_ENSURE_TRUE( aWrapColumn, NS_ERROR_NULL_POINTER);
*aWrapColumn = mWrapColumn;
return NS_OK;
}
//
// See if the style value includes this attribute, and if it does,
// cut out everything from the attribute to the next semicolon.
//
static void CutStyle(const char* stylename, nsString& styleValue)
{
// Find the current wrapping type:
PRInt32 styleStart = styleValue.Find(stylename, true);
if (styleStart >= 0)
{
PRInt32 styleEnd = styleValue.Find(";", false, styleStart);
if (styleEnd > styleStart)
styleValue.Cut(styleStart, styleEnd - styleStart + 1);
else
styleValue.Cut(styleStart, styleValue.Length() - styleStart);
}
}
//
// Change the wrap width on the root of this document.
//
NS_IMETHODIMP
nsPlaintextEditor::SetWrapWidth(PRInt32 aWrapColumn)
{
SetWrapColumn(aWrapColumn);
// Make sure we're a plaintext editor, otherwise we shouldn't
// do the rest of this.
if (!IsPlaintextEditor())
return NS_OK;
// Ought to set a style sheet here ...
// Probably should keep around an mPlaintextStyleSheet for this purpose.
dom::Element *rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_NULL_POINTER);
// Get the current style for this root element:
nsAutoString styleValue;
nsresult res = rootElement->GetAttr(kNameSpaceID_None, nsGkAtoms::style, styleValue);
NS_ENSURE_SUCCESS(res, res);
// We'll replace styles for these values:
CutStyle("white-space", styleValue);
CutStyle("width", styleValue);
CutStyle("font-family", styleValue);
// If we have other style left, trim off any existing semicolons
// or whitespace, then add a known semicolon-space:
if (!styleValue.IsEmpty())
{
styleValue.Trim("; \t", false, true);
styleValue.AppendLiteral("; ");
}
// Make sure we have fixed-width font. This should be done for us,
// but it isn't, see bug 22502, so we have to add "font: -moz-fixed;".
// Only do this if we're wrapping.
if (IsWrapHackEnabled() && aWrapColumn >= 0)
styleValue.AppendLiteral("font-family: -moz-fixed; ");
// If "mail.compose.wrap_to_window_width" is set, and we're a mail editor,
// then remember our wrap width (for output purposes) but set the visual
// wrapping to window width.
// We may reset mWrapToWindow here, based on the pref's current value.
if (IsMailEditor())
{
mWrapToWindow =
Preferences::GetBool("mail.compose.wrap_to_window_width", mWrapToWindow);
}
// and now we're ready to set the new whitespace/wrapping style.
if (aWrapColumn > 0 && !mWrapToWindow) // Wrap to a fixed column
{
styleValue.AppendLiteral("white-space: pre-wrap; width: ");
styleValue.AppendInt(aWrapColumn);
styleValue.AppendLiteral("ch;");
}
else if (mWrapToWindow || aWrapColumn == 0)
styleValue.AppendLiteral("white-space: pre-wrap;");
else
styleValue.AppendLiteral("white-space: pre;");
return rootElement->SetAttr(kNameSpaceID_None, nsGkAtoms::style, styleValue, true);
}
NS_IMETHODIMP
nsPlaintextEditor::SetWrapColumn(PRInt32 aWrapColumn)
{
mWrapColumn = aWrapColumn;
return NS_OK;
}
//
// Get the newline handling for this editor
//
NS_IMETHODIMP
nsPlaintextEditor::GetNewlineHandling(PRInt32 *aNewlineHandling)
{
NS_ENSURE_ARG_POINTER(aNewlineHandling);
*aNewlineHandling = mNewlineHandling;
return NS_OK;
}
//
// Change the newline handling for this editor
//
NS_IMETHODIMP
nsPlaintextEditor::SetNewlineHandling(PRInt32 aNewlineHandling)
{
mNewlineHandling = aNewlineHandling;
return NS_OK;
}
NS_IMETHODIMP
nsPlaintextEditor::Undo(PRUint32 aCount)
{
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
HandlingTrustedAction trusted(this);
nsAutoUpdateViewBatch beginViewBatching(this);
ForceCompositionEnd();
nsAutoRules beginRulesSniffing(this, kOpUndo, nsIEditor::eNone);
nsTextRulesInfo ruleInfo(nsTextEditRules::kUndo);
nsCOMPtr<nsISelection> selection;
GetSelection(getter_AddRefs(selection));
bool cancel, handled;
nsresult result = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
if (!cancel && NS_SUCCEEDED(result))
{
result = nsEditor::Undo(aCount);
result = mRules->DidDoAction(selection, &ruleInfo, result);
}
NotifyEditorObservers();
return result;
}
NS_IMETHODIMP
nsPlaintextEditor::Redo(PRUint32 aCount)
{
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
HandlingTrustedAction trusted(this);
nsAutoUpdateViewBatch beginViewBatching(this);
ForceCompositionEnd();
nsAutoRules beginRulesSniffing(this, kOpRedo, nsIEditor::eNone);
nsTextRulesInfo ruleInfo(nsTextEditRules::kRedo);
nsCOMPtr<nsISelection> selection;
GetSelection(getter_AddRefs(selection));
bool cancel, handled;
nsresult result = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
if (!cancel && NS_SUCCEEDED(result))
{
result = nsEditor::Redo(aCount);
result = mRules->DidDoAction(selection, &ruleInfo, result);
}
NotifyEditorObservers();
return result;
}
bool
nsPlaintextEditor::CanCutOrCopy()
{
nsCOMPtr<nsISelection> selection;
if (NS_FAILED(GetSelection(getter_AddRefs(selection))))
return false;
bool isCollapsed;
selection->GetIsCollapsed(&isCollapsed);
return !isCollapsed;
}
bool
nsPlaintextEditor::FireClipboardEvent(PRInt32 aType)
{
if (aType == NS_PASTE)
ForceCompositionEnd();
nsCOMPtr<nsIPresShell> presShell = GetPresShell();
NS_ENSURE_TRUE(presShell, false);
nsCOMPtr<nsISelection> selection;
if (NS_FAILED(GetSelection(getter_AddRefs(selection))))
return false;
if (!nsCopySupport::FireClipboardEvent(aType, presShell, selection))
return false;
// If the event handler caused the editor to be destroyed, return false.
// Otherwise return true to indicate that the event was not cancelled.
return !mDidPreDestroy;
}
NS_IMETHODIMP nsPlaintextEditor::Cut()
{
HandlingTrustedAction trusted(this);
if (FireClipboardEvent(NS_CUT))
return DeleteSelection(eNone);
return NS_OK;
}
NS_IMETHODIMP nsPlaintextEditor::CanCut(bool *aCanCut)
{
NS_ENSURE_ARG_POINTER(aCanCut);
*aCanCut = IsModifiable() && CanCutOrCopy();
return NS_OK;
}
NS_IMETHODIMP nsPlaintextEditor::Copy()
{
FireClipboardEvent(NS_COPY);
return NS_OK;
}
NS_IMETHODIMP nsPlaintextEditor::CanCopy(bool *aCanCopy)
{
NS_ENSURE_ARG_POINTER(aCanCopy);
*aCanCopy = CanCutOrCopy();
return NS_OK;
}
// Shared between OutputToString and OutputToStream
NS_IMETHODIMP
nsPlaintextEditor::GetAndInitDocEncoder(const nsAString& aFormatType,
PRUint32 aFlags,
const nsACString& aCharset,
nsIDocumentEncoder** encoder)
{
nsresult rv = NS_OK;
nsCAutoString formatType(NS_DOC_ENCODER_CONTRACTID_BASE);
formatType.AppendWithConversion(aFormatType);
nsCOMPtr<nsIDocumentEncoder> docEncoder (do_CreateInstance(formatType.get(), &rv));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryReferent(mDocWeak);
NS_ASSERTION(domDoc, "Need a document");
rv = docEncoder->Init(domDoc, aFormatType, aFlags);
NS_ENSURE_SUCCESS(rv, rv);
if (!aCharset.IsEmpty() && !aCharset.EqualsLiteral("null")) {
docEncoder->SetCharset(aCharset);
}
PRInt32 wc;
(void) GetWrapWidth(&wc);
if (wc >= 0)
(void) docEncoder->SetWrapColumn(wc);
// Set the selection, if appropriate.
// We do this either if the OutputSelectionOnly flag is set,
// in which case we use our existing selection ...
if (aFlags & nsIDocumentEncoder::OutputSelectionOnly)
{
nsCOMPtr<nsISelection> selection;
rv = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(rv, rv);
if (selection) {
rv = docEncoder->SetSelection(selection);
NS_ENSURE_SUCCESS(rv, rv);
}
}
// ... or if the root element is not a body,
// in which case we set the selection to encompass the root.
else
{
dom::Element* rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_FAILURE);
if (!rootElement->IsHTML(nsGkAtoms::body)) {
rv = docEncoder->SetNativeContainerNode(rootElement);
NS_ENSURE_SUCCESS(rv, rv);
}
}
docEncoder.forget(encoder);
return NS_OK;
}
NS_IMETHODIMP
nsPlaintextEditor::OutputToString(const nsAString& aFormatType,
PRUint32 aFlags,
nsAString& aOutputString)
{
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
nsString resultString;
nsTextRulesInfo ruleInfo(nsTextEditRules::kOutputText);
ruleInfo.outString = &resultString;
// XXX Struct should store a nsAReadable*
nsAutoString str(aFormatType);
ruleInfo.outputFormat = &str;
bool cancel, handled;
nsresult rv = mRules->WillDoAction(nsnull, &ruleInfo, &cancel, &handled);
if (cancel || NS_FAILED(rv)) { return rv; }
if (handled)
{ // this case will get triggered by password fields
aOutputString.Assign(*(ruleInfo.outString));
return rv;
}
nsCAutoString charsetStr;
rv = GetDocumentCharacterSet(charsetStr);
if(NS_FAILED(rv) || charsetStr.IsEmpty())
charsetStr.AssignLiteral("ISO-8859-1");
nsCOMPtr<nsIDocumentEncoder> encoder;
rv = GetAndInitDocEncoder(aFormatType, aFlags, charsetStr, getter_AddRefs(encoder));
NS_ENSURE_SUCCESS(rv, rv);
return encoder->EncodeToString(aOutputString);
}
NS_IMETHODIMP
nsPlaintextEditor::OutputToStream(nsIOutputStream* aOutputStream,
const nsAString& aFormatType,
const nsACString& aCharset,
PRUint32 aFlags)
{
nsresult rv;
// special-case for empty document when requesting plain text,
// to account for the bogus text node.
// XXX Should there be a similar test in OutputToString?
if (aFormatType.EqualsLiteral("text/plain"))
{
bool docEmpty;
rv = GetDocumentIsEmpty(&docEmpty);
NS_ENSURE_SUCCESS(rv, rv);
if (docEmpty)
return NS_OK; // output nothing
}
nsCOMPtr<nsIDocumentEncoder> encoder;
rv = GetAndInitDocEncoder(aFormatType, aFlags, aCharset,
getter_AddRefs(encoder));
NS_ENSURE_SUCCESS(rv, rv);
return encoder->EncodeToStream(aOutputStream);
}
NS_IMETHODIMP
nsPlaintextEditor::InsertTextWithQuotations(const nsAString &aStringToInsert)
{
return InsertText(aStringToInsert);
}
NS_IMETHODIMP
nsPlaintextEditor::PasteAsQuotation(PRInt32 aSelectionType)
{
// Get Clipboard Service
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
NS_ENSURE_SUCCESS(rv, rv);
// Create generic Transferable for getting the data
nsCOMPtr<nsITransferable> trans = do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
if (NS_SUCCEEDED(rv) && trans)
{
// We only handle plaintext pastes here
trans->AddDataFlavor(kUnicodeMime);
// Get the Data from the clipboard
clipboard->GetData(trans, aSelectionType);
// Now we ask the transferable for the data
// it still owns the data, we just have a pointer to it.
// If it can't support a "text" output of the data the call will fail
nsCOMPtr<nsISupports> genericDataObj;
PRUint32 len;
char* flav = nsnull;
rv = trans->GetAnyTransferData(&flav, getter_AddRefs(genericDataObj),
&len);
if (NS_FAILED(rv) || !flav)
{
#ifdef DEBUG_akkana
printf("PasteAsPlaintextQuotation: GetAnyTransferData failed, %d\n", rv);
#endif
return rv;
}
#ifdef DEBUG_clipboard
printf("Got flavor [%s]\n", flav);
#endif
if (0 == nsCRT::strcmp(flav, kUnicodeMime))
{
nsCOMPtr<nsISupportsString> textDataObj ( do_QueryInterface(genericDataObj) );
if (textDataObj && len > 0)
{
nsAutoString stuffToPaste;
textDataObj->GetData ( stuffToPaste );
nsAutoEditBatch beginBatching(this);
rv = InsertAsQuotation(stuffToPaste, 0);
}
}
NS_Free(flav);
}
return rv;
}
NS_IMETHODIMP
nsPlaintextEditor::InsertAsQuotation(const nsAString& aQuotedText,
nsIDOMNode **aNodeInserted)
{
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
// Let the citer quote it for us:
nsString quotedStuff;
nsresult rv = nsInternetCiter::GetCiteString(aQuotedText, quotedStuff);
NS_ENSURE_SUCCESS(rv, rv);
// It's best to put a blank line after the quoted text so that mails
// written without thinking won't be so ugly.
if (!aQuotedText.IsEmpty() && (aQuotedText.Last() != PRUnichar('\n')))
quotedStuff.Append(PRUnichar('\n'));
// get selection
nsCOMPtr<nsISelection> selection;
rv = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
nsAutoEditBatch beginBatching(this);
nsAutoRules beginRulesSniffing(this, kOpInsertText, nsIEditor::eNext);
// give rules a chance to handle or cancel
nsTextRulesInfo ruleInfo(nsTextEditRules::kInsertElement);
bool cancel, handled;
rv = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
NS_ENSURE_SUCCESS(rv, rv);
if (cancel) return NS_OK; // rules canceled the operation
if (!handled)
{
rv = InsertText(quotedStuff);
// XXX Should set *aNodeInserted to the first node inserted
if (aNodeInserted && NS_SUCCEEDED(rv))
{
*aNodeInserted = 0;
//NS_IF_ADDREF(*aNodeInserted);
}
}
return rv;
}
NS_IMETHODIMP
nsPlaintextEditor::PasteAsCitedQuotation(const nsAString& aCitation,
PRInt32 aSelectionType)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsPlaintextEditor::InsertAsCitedQuotation(const nsAString& aQuotedText,
const nsAString& aCitation,
bool aInsertHTML,
nsIDOMNode **aNodeInserted)
{
return InsertAsQuotation(aQuotedText, aNodeInserted);
}
nsresult
nsPlaintextEditor::SharedOutputString(PRUint32 aFlags,
bool* aIsCollapsed,
nsAString& aResult)
{
nsCOMPtr<nsISelection> selection;
nsresult rv = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(selection, NS_ERROR_NOT_INITIALIZED);
rv = selection->GetIsCollapsed(aIsCollapsed);
NS_ENSURE_SUCCESS(rv, rv);
if (!*aIsCollapsed)
aFlags |= nsIDocumentEncoder::OutputSelectionOnly;
// If the selection isn't collapsed, we'll use the whole document.
return OutputToString(NS_LITERAL_STRING("text/plain"), aFlags, aResult);
}
NS_IMETHODIMP
nsPlaintextEditor::Rewrap(bool aRespectNewlines)
{
PRInt32 wrapCol;
nsresult rv = GetWrapWidth(&wrapCol);
NS_ENSURE_SUCCESS(rv, NS_OK);
// Rewrap makes no sense if there's no wrap column; default to 72.
if (wrapCol <= 0)
wrapCol = 72;
#ifdef DEBUG_akkana
printf("nsPlaintextEditor::Rewrap to %ld columns\n", (long)wrapCol);
#endif
nsAutoString current;
bool isCollapsed;
rv = SharedOutputString(nsIDocumentEncoder::OutputFormatted
| nsIDocumentEncoder::OutputLFLineBreak,
&isCollapsed, current);
NS_ENSURE_SUCCESS(rv, rv);
nsString wrapped;
PRUint32 firstLineOffset = 0; // XXX need to reset this if there is a selection
rv = nsInternetCiter::Rewrap(current, wrapCol, firstLineOffset, aRespectNewlines,
wrapped);
NS_ENSURE_SUCCESS(rv, rv);
if (isCollapsed) // rewrap the whole document
SelectAll();
return InsertTextWithQuotations(wrapped);
}
NS_IMETHODIMP
nsPlaintextEditor::StripCites()
{
#ifdef DEBUG_akkana
printf("nsPlaintextEditor::StripCites()\n");
#endif
nsAutoString current;
bool isCollapsed;
nsresult rv = SharedOutputString(nsIDocumentEncoder::OutputFormatted,
&isCollapsed, current);
NS_ENSURE_SUCCESS(rv, rv);
nsString stripped;
rv = nsInternetCiter::StripCites(current, stripped);
NS_ENSURE_SUCCESS(rv, rv);
if (isCollapsed) // rewrap the whole document
{
rv = SelectAll();
NS_ENSURE_SUCCESS(rv, rv);
}
return InsertText(stripped);
}
NS_IMETHODIMP
nsPlaintextEditor::GetEmbeddedObjects(nsISupportsArray** aNodeList)
{
*aNodeList = 0;
return NS_OK;
}
/** All editor operations which alter the doc should be prefaced
* with a call to StartOperation, naming the action and direction */
NS_IMETHODIMP
nsPlaintextEditor::StartOperation(PRInt32 opID, nsIEditor::EDirection aDirection)
{
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
nsEditor::StartOperation(opID, aDirection); // will set mAction, mDirection
if (mRules) return mRules->BeforeEdit(mAction, mDirection);
return NS_OK;
}
/** All editor operations which alter the doc should be followed
* with a call to EndOperation */
NS_IMETHODIMP
nsPlaintextEditor::EndOperation()
{
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
// post processing
nsresult res = NS_OK;
if (mRules) res = mRules->AfterEdit(mAction, mDirection);
nsEditor::EndOperation(); // will clear mAction, mDirection
return res;
}
NS_IMETHODIMP
nsPlaintextEditor::SelectEntireDocument(nsISelection *aSelection)
{
if (!aSelection || !mRules) { return NS_ERROR_NULL_POINTER; }
// Protect the edit rules object from dying
nsCOMPtr<nsIEditRules> kungFuDeathGrip(mRules);
// is doc empty?
bool bDocIsEmpty;
if (NS_SUCCEEDED(mRules->DocumentIsEmpty(&bDocIsEmpty)) && bDocIsEmpty)
{
// get root node
nsCOMPtr<nsIDOMElement> rootElement = do_QueryInterface(GetRoot());
NS_ENSURE_TRUE(rootElement, NS_ERROR_FAILURE);
// if it's empty don't select entire doc - that would select the bogus node
return aSelection->Collapse(rootElement, 0);
}
nsresult rv = nsEditor::SelectEntireDocument(aSelection);
NS_ENSURE_SUCCESS(rv, rv);
// Don't select the trailing BR node if we have one
PRInt32 selOffset;
nsCOMPtr<nsIDOMNode> selNode;
rv = GetEndNodeAndOffset(aSelection, getter_AddRefs(selNode), &selOffset);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> childNode = GetChildAt(selNode, selOffset - 1);
if (childNode && nsTextEditUtils::IsMozBR(childNode)) {
nsCOMPtr<nsIDOMNode> parentNode;
PRInt32 parentOffset;
rv = GetNodeLocation(childNode, address_of(parentNode), &parentOffset);
NS_ENSURE_SUCCESS(rv, rv);
return aSelection->Extend(parentNode, parentOffset);
}
return NS_OK;
}
already_AddRefed<nsIDOMEventTarget>
nsPlaintextEditor::GetDOMEventTarget()
{
nsCOMPtr<nsIDOMEventTarget> copy = mEventTarget;
return copy.forget();
}
nsresult
nsPlaintextEditor::SetAttributeOrEquivalent(nsIDOMElement * aElement,
const nsAString & aAttribute,
const nsAString & aValue,
bool aSuppressTransaction)
{
return nsEditor::SetAttribute(aElement, aAttribute, aValue);
}
nsresult
nsPlaintextEditor::RemoveAttributeOrEquivalent(nsIDOMElement * aElement,
const nsAString & aAttribute,
bool aSuppressTransaction)
{
return nsEditor::RemoveAttribute(aElement, aAttribute);
}
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