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gecko/editor/libeditor/text/nsPlaintextEditor.cpp
liucougar@gmail.com cc07460944 Bug 502259. Make delete at end of paragraph work. r=cpearce
2009-08-04 09:46:48 +12:00

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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 <mats.palmgren@bredband.net>
*
* 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 "nsEditorEventListeners.h"
#include "nsIEditActionListener.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsIDocument.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOM3EventTarget.h"
#include "nsIDOMKeyEvent.h"
#include "nsIDOMMouseListener.h"
#include "nsISelection.h"
#include "nsISelectionPrivate.h"
#include "nsISelectionController.h"
#include "nsGUIEvent.h"
#include "nsIDOMEventGroup.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 "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsUnicharUtils.h"
#include "nsContentCID.h"
#include "nsInternetCiter.h"
#include "nsEventDispatcher.h"
#include "nsGkAtoms.h"
// Drag & Drop, Clipboard
#include "nsIClipboard.h"
#include "nsITransferable.h"
#include "nsCopySupport.h"
// prototype for rules creation shortcut
nsresult NS_NewTextEditRules(nsIEditRules** aInstancePtrResult);
nsPlaintextEditor::nsPlaintextEditor()
: nsEditor()
, mIgnoreSpuriousDragEvent(PR_FALSE)
, mRules(nsnull)
, mWrapToWindow(PR_FALSE)
, mWrapColumn(0)
, mMaxTextLength(-1)
, mInitTriggerCounter(0)
, mNewlineHandling(nsIPlaintextEditor::eNewlinesPasteToFirst)
#ifdef XP_WIN
, mCaretStyle(1)
#else
, mCaretStyle(0)
#endif
{
}
nsPlaintextEditor::~nsPlaintextEditor()
{
// remove the rules as an action listener. Else we get a bad ownership loop later on.
// it's ok if the rules aren't a listener; we ignore the error.
nsCOMPtr<nsIEditActionListener> mListener = do_QueryInterface(mRules);
RemoveEditActionListener(mListener);
// 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,
nsIPresShell *aPresShell, nsIContent *aRoot, nsISelectionController *aSelCon, PRUint32 aFlags)
{
NS_PRECONDITION(aDoc && aPresShell, "bad arg");
if (!aDoc || !aPresShell)
return 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, aPresShell, aRoot, aSelCon, aFlags);
}
// check the "single line editor newline handling"
// and "caret behaviour in selection" prefs
nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
if (prefBranch)
{
prefBranch->GetIntPref("editor.singleLine.pasteNewlines",
&mNewlineHandling);
prefBranch->GetIntPref("layout.selection.caret_style", &mCaretStyle);
#ifdef XP_WIN
if (mCaretStyle == 0)
mCaretStyle = 1;
#endif
}
if (NS_FAILED(rulesRes)) return rulesRes;
return res;
}
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))
EnableUndo(PR_TRUE);
}
return res;
}
NS_IMETHODIMP
nsPlaintextEditor::SetDocumentCharacterSet(const nsACString & characterSet)
{
nsresult result;
result = nsEditor::SetDocumentCharacterSet(characterSet);
// update META charset tag
if (NS_SUCCEEDED(result)) {
nsCOMPtr<nsIDOMDocument>domdoc;
result = GetDocument(getter_AddRefs(domdoc));
if (NS_SUCCEEDED(result) && domdoc) {
nsCOMPtr<nsIDOMNodeList>metaList;
nsCOMPtr<nsIDOMElement>metaElement;
PRBool newMetaCharset = PR_TRUE;
// get a list of META tags
result = domdoc->GetElementsByTagName(NS_LITERAL_STRING("meta"), getter_AddRefs(metaList));
if (NS_SUCCEEDED(result) && metaList) {
PRUint32 listLength = 0;
(void) metaList->GetLength(&listLength);
nsCOMPtr<nsIDOMNode>metaNode;
for (PRUint32 i = 0; i < listLength; i++) {
metaList->Item(i, getter_AddRefs(metaNode));
if (!metaNode) continue;
metaElement = do_QueryInterface(metaNode);
if (!metaElement) continue;
nsAutoString currentValue;
if (NS_FAILED(metaElement->GetAttribute(NS_LITERAL_STRING("http-equiv"), currentValue))) continue;
if (FindInReadable(NS_LITERAL_STRING("content-type"),
currentValue,
nsCaseInsensitiveStringComparator())) {
NS_NAMED_LITERAL_STRING(content, "content");
if (NS_FAILED(metaElement->GetAttribute(content, currentValue))) continue;
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())) {
// set attribute to <original prefix> charset=text/html
result = nsEditor::SetAttribute(metaElement, content,
Substring(originalStart, start) +
charsetEquals + NS_ConvertASCIItoUTF16(characterSet));
if (NS_SUCCEEDED(result))
newMetaCharset = PR_FALSE;
break;
}
}
}
}
if (newMetaCharset) {
nsCOMPtr<nsIDOMNodeList>headList;
result = domdoc->GetElementsByTagName(NS_LITERAL_STRING("head"),getter_AddRefs(headList));
if (NS_SUCCEEDED(result) && headList) {
nsCOMPtr<nsIDOMNode>headNode;
headList->Item(0, getter_AddRefs(headNode));
if (headNode) {
nsCOMPtr<nsIDOMNode>resultNode;
// Create a new meta charset tag
result = CreateNode(NS_LITERAL_STRING("meta"), headNode, 0, getter_AddRefs(resultNode));
if (NS_FAILED(result))
return NS_ERROR_FAILURE;
// Set attributes to the created element
if (resultNode && !characterSet.IsEmpty()) {
metaElement = do_QueryInterface(resultNode);
if (metaElement) {
// not undoable, undo should undo CreateNode
result = metaElement->SetAttribute(NS_LITERAL_STRING("http-equiv"), NS_LITERAL_STRING("Content-Type"));
if (NS_SUCCEEDED(result)) {
// not undoable, undo should undo CreateNode
result = metaElement->SetAttribute(NS_LITERAL_STRING("content"),
NS_LITERAL_STRING("text/html;charset=") + NS_ConvertASCIItoUTF16(characterSet));
}
}
}
}
}
}
}
}
return result;
}
nsresult
nsPlaintextEditor::CreateEventListeners()
{
nsresult rv = NS_OK;
if (!mMouseListenerP) {
// get a mouse listener
rv |= NS_NewEditorMouseListener(getter_AddRefs(mMouseListenerP), this);
}
if (!mKeyListenerP) {
// get a key listener
rv |= NS_NewEditorKeyListener(getter_AddRefs(mKeyListenerP), this);
}
if (!mTextListenerP) {
// get a text listener
rv |= NS_NewEditorTextListener(getter_AddRefs(mTextListenerP), this);
}
if (!mCompositionListenerP) {
// get a composition listener
rv |=
NS_NewEditorCompositionListener(getter_AddRefs(mCompositionListenerP),
this);
}
nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShellWeak);
if (!mDragListenerP) {
// get a drag listener
rv |= NS_NewEditorDragListener(getter_AddRefs(mDragListenerP), presShell,
this);
}
if (!mFocusListenerP) {
// get a focus listener
rv |= NS_NewEditorFocusListener(getter_AddRefs(mFocusListenerP),
this, presShell);
}
return rv;
}
NS_IMETHODIMP
nsPlaintextEditor::GetFlags(PRUint32 *aFlags)
{
if (!mRules || !aFlags) { return NS_ERROR_NULL_POINTER; }
return mRules->GetFlags(aFlags);
}
NS_IMETHODIMP
nsPlaintextEditor::SetFlags(PRUint32 aFlags)
{
if (!mRules) { return NS_ERROR_NULL_POINTER; }
return mRules->SetFlags(aFlags);
}
NS_IMETHODIMP nsPlaintextEditor::InitRules()
{
// instantiate the rules for this text editor
nsresult res = NS_NewTextEditRules(getter_AddRefs(mRules));
if (NS_FAILED(res)) return res;
if (!mRules) return NS_ERROR_UNEXPECTED;
return mRules->Init(this, mFlags);
}
NS_IMETHODIMP
nsPlaintextEditor::GetIsDocumentEditable(PRBool *aIsDocumentEditable)
{
NS_ENSURE_ARG_POINTER(aIsDocumentEditable);
nsCOMPtr<nsIDOMDocument> doc;
GetDocument(getter_AddRefs(doc));
*aIsDocumentEditable = doc ? IsModifiable() : PR_FALSE;
return NS_OK;
}
PRBool nsPlaintextEditor::IsModifiable()
{
PRUint32 flags;
if (NS_SUCCEEDED(GetFlags(&flags)))
return ((flags & eEditorReadonlyMask) == 0);
return PR_FALSE;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark nsIHTMLEditor methods
#pragma mark -
#endif
NS_IMETHODIMP nsPlaintextEditor::HandleKeyPress(nsIDOMKeyEvent* aKeyEvent)
{
PRUint32 keyCode, character;
PRBool ctrlKey, altKey, metaKey;
if (!aKeyEvent) return NS_ERROR_NULL_POINTER;
if (NS_SUCCEEDED(aKeyEvent->GetKeyCode(&keyCode)) &&
NS_SUCCEEDED(aKeyEvent->GetCtrlKey(&ctrlKey)) &&
NS_SUCCEEDED(aKeyEvent->GetAltKey(&altKey)) &&
NS_SUCCEEDED(aKeyEvent->GetMetaKey(&metaKey)))
{
aKeyEvent->GetCharCode(&character);
if (keyCode == nsIDOMKeyEvent::DOM_VK_RETURN
|| keyCode == nsIDOMKeyEvent::DOM_VK_ENTER)
{
nsString empty;
return TypedText(empty, eTypedBreak);
}
else if (keyCode == nsIDOMKeyEvent::DOM_VK_ESCAPE)
{
// pass escape keypresses through as empty strings: needed for ime support
nsString empty;
return TypedText(empty, eTypedText);
}
if (character && !altKey && !ctrlKey && !metaKey)
{
aKeyEvent->PreventDefault();
nsAutoString key(character);
return TypedText(key, eTypedText);
}
}
return NS_ERROR_FAILURE;
}
/* 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;
}
NS_IMETHODIMP nsPlaintextEditor::CreateBRImpl(nsCOMPtr<nsIDOMNode> *aInOutParent, PRInt32 *aInOutOffset, nsCOMPtr<nsIDOMNode> *outBRNode, EDirection aSelect)
{
if (!aInOutParent || !*aInOutParent || !aInOutOffset || !outBRNode) return 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);
if (!tmp) return 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));
if (NS_FAILED(res)) return res;
res = GetNodeLocation(node, address_of(tmp), &offset);
if (NS_FAILED(res)) return res;
}
// create br
res = CreateNode(brType, tmp, offset, getter_AddRefs(brNode));
if (NS_FAILED(res)) return res;
*aInOutParent = tmp;
*aInOutOffset = offset+1;
}
else
{
res = CreateNode(brType, node, theOffset, getter_AddRefs(brNode));
if (NS_FAILED(res)) return res;
(*aInOutOffset)++;
}
*outBRNode = brNode;
if (*outBRNode && (aSelect != eNone))
{
nsCOMPtr<nsIDOMNode> parent;
PRInt32 offset;
res = GetNodeLocation(*outBRNode, address_of(parent), &offset);
if (NS_FAILED(res)) return res;
nsCOMPtr<nsISelection> selection;
res = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(res)) return res;
nsCOMPtr<nsISelectionPrivate> selPriv(do_QueryInterface(selection));
if (aSelect == eNext)
{
// position selection after br
selPriv->SetInterlinePosition(PR_TRUE);
res = selection->Collapse(parent, offset+1);
}
else if (aSelect == ePrevious)
{
// position selection before br
selPriv->SetInterlinePosition(PR_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);
}
NS_IMETHODIMP nsPlaintextEditor::InsertBR(nsCOMPtr<nsIDOMNode> *outBRNode)
{
if (!outBRNode) return 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));
if (NS_FAILED(res)) return res;
PRBool bCollapsed;
res = selection->GetIsCollapsed(&bCollapsed);
if (NS_FAILED(res)) return res;
if (!bCollapsed)
{
res = DeleteSelection(nsIEditor::eNone);
if (NS_FAILED(res)) return res;
}
nsCOMPtr<nsIDOMNode> selNode;
PRInt32 selOffset;
res = GetStartNodeAndOffset(selection, address_of(selNode), &selOffset);
if (NS_FAILED(res)) return res;
res = CreateBR(selNode, selOffset, outBRNode);
if (NS_FAILED(res)) return res;
// position selection after br
res = GetNodeLocation(*outBRNode, address_of(selNode), &selOffset);
if (NS_FAILED(res)) return res;
nsCOMPtr<nsISelectionPrivate> selPriv(do_QueryInterface(selection));
selPriv->SetInterlinePosition(PR_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);
nsIDOMElement* rootNode = GetRoot();
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;
nsCOMPtr<nsIContent> rootContent = do_QueryInterface(rootNode);
iter->Init(rootContent);
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().
PRBool 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
++nodeCount;
#endif
}
if (endOffset == -1) {
NS_ASSERTION(endNode == rootNode, "failed to find the end node");
NS_ASSERTION(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;
PRBool bCollapsed;
result = aSelection->GetIsCollapsed(&bCollapsed);
if (NS_FAILED(result)) return result;
if (*aAction == eNextWord || *aAction == ePreviousWord
|| (*aAction == eNext && bCollapsed)
|| *aAction == eToBeginningOfLine || *aAction == eToEndOfLine)
{
nsCOMPtr<nsISelectionController> selCont (do_QueryReferent(mSelConWeak));
if (!selCont)
return NS_ERROR_NO_INTERFACE;
switch (*aAction)
{
case eNextWord:
result = selCont->WordExtendForDelete(PR_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(PR_FALSE);
*aAction = eNone;
break;
case eNext:
result = selCont->CharacterExtendForDelete();
// Don't set aAction to eNone (see Bug 502259)
break;
case ePrevious:
/* FIXME: extend selection over UTF-16 surrogates for Bug #332636
* and set *aAction = eNone
*/
result = NS_OK;
break;
case eToBeginningOfLine:
selCont->IntraLineMove(PR_TRUE, PR_FALSE); // try to move to end
result = selCont->IntraLineMove(PR_FALSE, PR_TRUE); // select to beginning
*aAction = eNone;
break;
case eToEndOfLine:
result = selCont->IntraLineMove(PR_TRUE, PR_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; }
nsresult result;
// delete placeholder txns merge.
nsAutoPlaceHolderBatch batch(this, nsGkAtoms::DeleteTxnName);
nsAutoRules beginRulesSniffing(this, kOpDeleteSelection, aAction);
// pre-process
nsCOMPtr<nsISelection> selection;
result = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) return result;
if (!selection) return 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.
PRBool bCollapsed;
result = selection->GetIsCollapsed(&bCollapsed);
if (NS_FAILED(result)) return result;
if (!bCollapsed &&
(aAction == eNextWord || aAction == ePreviousWord ||
aAction == eToBeginningOfLine || aAction == eToEndOfLine))
{
if (mCaretStyle == 1)
{
result = selection->CollapseToStart();
if (NS_FAILED(result)) return result;
}
else
{
aAction = eNone;
}
}
nsTextRulesInfo ruleInfo(nsTextEditRules::kDeleteSelection);
ruleInfo.collapsedAction = aAction;
PRBool cancel, handled;
result = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
if (NS_FAILED(result)) return 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; }
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));
if (NS_FAILED(result)) return result;
if (!selection) return 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;
PRBool cancel, handled;
result = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
if (NS_FAILED(result)) return 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; }
nsAutoEditBatch beginBatching(this);
nsAutoRules beginRulesSniffing(this, kOpInsertBreak, nsIEditor::eNext);
// pre-process
nsCOMPtr<nsISelection> selection;
nsresult res;
res = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(res)) return res;
if (!selection) return 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;
res = GetPresShell(getter_AddRefs(shell));
if (NS_FAILED(res)) return res;
shell->MaybeInvalidateCaretPosition();
nsTextRulesInfo ruleInfo(nsTextEditRules::kInsertBreak);
PRBool cancel, handled;
res = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
if (NS_FAILED(res)) return res;
if (!cancel && !handled)
{
// create the new BR node
nsCOMPtr<nsIDOMNode> newNode;
res = DeleteSelectionAndCreateNode(NS_LITERAL_STRING("br"), getter_AddRefs(newNode));
if (!newNode) res = NS_ERROR_NULL_POINTER; // don't return here, so DidDoAction is called
if (NS_SUCCEEDED(res))
{
// set the selection to the new node
nsCOMPtr<nsIDOMNode>parent;
res = newNode->GetParentNode(getter_AddRefs(parent));
if (!parent) res = NS_ERROR_NULL_POINTER; // don't return here, so DidDoAction is called
if (NS_SUCCEEDED(res))
{
PRInt32 offsetInParent=-1; // we use the -1 as a marker to see if we need to compute this or not
nsCOMPtr<nsIDOMNode>nextNode;
newNode->GetNextSibling(getter_AddRefs(nextNode));
if (nextNode)
{
nsCOMPtr<nsIDOMCharacterData>nextTextNode = do_QueryInterface(nextNode);
if (!nextTextNode) {
nextNode = do_QueryInterface(newNode); // is this QI needed?
}
else {
offsetInParent=0;
}
}
else {
nextNode = do_QueryInterface(newNode); // is this QI needed?
}
if (-1==offsetInParent)
{
nextNode->GetParentNode(getter_AddRefs(parent));
res = GetChildOffset(nextNode, parent, offsetInParent);
if (NS_SUCCEEDED(res)) {
// SetInterlinePosition(PR_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(PR_TRUE);
res = selection->Collapse(parent, offsetInParent+1); // +1 to insert just after the break
}
}
else
{
res = selection->Collapse(nextNode, offsetInParent);
}
}
}
}
if (!cancel)
{
// post-process, always called if WillInsertBreak didn't return cancel==PR_TRUE
res = mRules->DidDoAction(selection, &ruleInfo, res);
}
return res;
}
NS_IMETHODIMP
nsPlaintextEditor::BeginComposition(nsTextEventReply* aReply)
{
NS_ENSURE_TRUE(!mInIMEMode, NS_OK);
if(mFlags & nsIPlaintextEditor::eEditorPasswordMask) {
if (mRules) {
nsIEditRules *p = mRules.get();
nsTextEditRules *textEditRules = static_cast<nsTextEditRules *>(p);
textEditRules->ResetIMETextPWBuf();
}
else {
return NS_ERROR_NULL_POINTER;
}
}
return nsEditor::BeginComposition(aReply);
}
NS_IMETHODIMP
nsPlaintextEditor::GetDocumentIsEmpty(PRBool *aDocumentIsEmpty)
{
if (!aDocumentIsEmpty)
return NS_ERROR_NULL_POINTER;
if (!mRules)
return NS_ERROR_NOT_INITIALIZED;
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
PRBool docEmpty;
nsresult rv = GetDocumentIsEmpty(&docEmpty);
NS_ENSURE_SUCCESS(rv, rv);
if (docEmpty)
return NS_OK;
nsIDOMElement* rootNode = GetRoot();
NS_ENSURE_TRUE(rootNode, 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;
nsCOMPtr<nsIContent> rootContent = do_QueryInterface(rootNode);
iter->Init(rootContent);
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)
{
if (!aMaxTextLength)
return NS_ERROR_INVALID_POINTER;
*aMaxTextLength = mMaxTextLength;
return NS_OK;
}
//
// Get the wrap width
//
NS_IMETHODIMP
nsPlaintextEditor::GetWrapWidth(PRInt32 *aWrapColumn)
{
if (! aWrapColumn)
return 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, PR_TRUE);
if (styleStart >= 0)
{
PRInt32 styleEnd = styleValue.Find(";", PR_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.
PRUint32 flags = 0;
GetFlags(&flags);
if (!(flags & eEditorPlaintextMask))
return NS_OK;
// Ought to set a style sheet here ...
// Probably should keep around an mPlaintextStyleSheet for this purpose.
nsIDOMElement *rootElement = GetRoot();
if (!rootElement)
return NS_ERROR_NULL_POINTER;
// Get the current style for this root element:
NS_NAMED_LITERAL_STRING(styleName, "style");
nsAutoString styleValue;
nsresult res = rootElement->GetAttribute(styleName, styleValue);
if (NS_FAILED(res)) return 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", PR_FALSE, PR_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 ((flags & eEditorEnableWrapHackMask) && 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 (flags & eEditorMailMask)
{
nsresult rv;
nsCOMPtr<nsIPrefBranch> prefBranch =
do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv))
prefBranch->GetBoolPref("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->SetAttribute(styleName, styleValue);
}
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;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark nsIEditor overrides
#pragma mark -
#endif
NS_IMETHODIMP
nsPlaintextEditor::Undo(PRUint32 aCount)
{
nsAutoUpdateViewBatch beginViewBatching(this);
ForceCompositionEnd();
nsAutoRules beginRulesSniffing(this, kOpUndo, nsIEditor::eNone);
nsTextRulesInfo ruleInfo(nsTextEditRules::kUndo);
nsCOMPtr<nsISelection> selection;
GetSelection(getter_AddRefs(selection));
PRBool 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);
}
return result;
}
NS_IMETHODIMP
nsPlaintextEditor::Redo(PRUint32 aCount)
{
nsAutoUpdateViewBatch beginViewBatching(this);
ForceCompositionEnd();
nsAutoRules beginRulesSniffing(this, kOpRedo, nsIEditor::eNone);
nsTextRulesInfo ruleInfo(nsTextEditRules::kRedo);
nsCOMPtr<nsISelection> selection;
GetSelection(getter_AddRefs(selection));
PRBool 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);
}
return result;
}
nsresult nsPlaintextEditor::GetClipboardEventTarget(nsIDOMNode** aEventTarget)
{
NS_ENSURE_ARG_POINTER(aEventTarget);
*aEventTarget = nsnull;
nsCOMPtr<nsISelection> selection;
nsresult res = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(res))
return res;
return nsCopySupport::GetClipboardEventTarget(selection, aEventTarget);
}
nsresult nsPlaintextEditor::FireClipboardEvent(PRUint32 msg,
PRBool* aPreventDefault)
{
*aPreventDefault = PR_FALSE;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps)
return NS_ERROR_NOT_INITIALIZED;
// Unsafe to fire event during reflow (bug 396108)
PRBool isReflowing = PR_TRUE;
nsresult rv = ps->IsReflowLocked(&isReflowing);
if (NS_FAILED(rv) || isReflowing)
return NS_OK;
nsCOMPtr<nsIDOMNode> eventTarget;
rv = GetClipboardEventTarget(getter_AddRefs(eventTarget));
if (NS_FAILED(rv))
// On failure to get event target, just forget about it and don't fire.
return NS_OK;
nsEventStatus status = nsEventStatus_eIgnore;
nsEvent evt(PR_TRUE, msg);
nsEventDispatcher::Dispatch(eventTarget, ps->GetPresContext(), &evt,
nsnull, &status);
// if event handler return'd false (PreventDefault)
if (status == nsEventStatus_eConsumeNoDefault)
*aPreventDefault = PR_TRUE;
// Did the event handler cause the editor to be destroyed? (ie. the input
// element was removed from the document) Don't proceed with command,
// could crash, definitely does during paste.
if (mDidPreDestroy)
return NS_ERROR_NOT_INITIALIZED;
return NS_OK;
}
NS_IMETHODIMP nsPlaintextEditor::Cut()
{
PRBool preventDefault;
nsresult rv = FireClipboardEvent(NS_CUT, &preventDefault);
if (NS_FAILED(rv) || preventDefault)
return rv;
nsCOMPtr<nsISelection> selection;
rv = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(rv))
return rv;
PRBool isCollapsed;
if (NS_SUCCEEDED(selection->GetIsCollapsed(&isCollapsed)) && isCollapsed)
return NS_OK; // just return ok so no JS error is thrown
// ps should be guaranteed by FireClipboardEvent not failing
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
rv = ps->DoCopy();
if (NS_SUCCEEDED(rv))
rv = DeleteSelection(eNone);
return rv;
}
NS_IMETHODIMP nsPlaintextEditor::CanCut(PRBool *aCanCut)
{
NS_ENSURE_ARG_POINTER(aCanCut);
*aCanCut = PR_FALSE;
nsCOMPtr<nsISelection> selection;
nsresult rv = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(rv)) return rv;
PRBool isCollapsed;
rv = selection->GetIsCollapsed(&isCollapsed);
if (NS_FAILED(rv)) return rv;
*aCanCut = !isCollapsed && IsModifiable();
return NS_OK;
}
NS_IMETHODIMP nsPlaintextEditor::Copy()
{
PRBool preventDefault;
nsresult rv = FireClipboardEvent(NS_COPY, &preventDefault);
if (NS_FAILED(rv) || preventDefault)
return rv;
// ps should be guaranteed by FireClipboardEvent not failing
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
return ps->DoCopy();
}
NS_IMETHODIMP nsPlaintextEditor::CanCopy(PRBool *aCanCopy)
{
NS_ENSURE_ARG_POINTER(aCanCopy);
*aCanCopy = PR_FALSE;
nsCOMPtr<nsISelection> selection;
nsresult rv = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(rv)) return rv;
PRBool isCollapsed;
rv = selection->GetIsCollapsed(&isCollapsed);
if (NS_FAILED(rv)) return rv;
*aCanCopy = !isCollapsed;
return NS_OK;
}
// Shared between OutputToString and OutputToStream
NS_IMETHODIMP
nsPlaintextEditor::GetAndInitDocEncoder(const nsAString& aFormatType,
PRUint32 aFlags,
const nsACString& aCharset,
nsIDocumentEncoder** encoder)
{
nsCOMPtr<nsIPresShell> presShell;
nsresult rv = GetPresShell(getter_AddRefs(presShell));
if (NS_FAILED(rv)) return rv;
if (!presShell) return NS_ERROR_FAILURE;
nsCAutoString formatType(NS_DOC_ENCODER_CONTRACTID_BASE);
formatType.AppendWithConversion(aFormatType);
nsCOMPtr<nsIDocumentEncoder> docEncoder (do_CreateInstance(formatType.get(), &rv));
NS_ENSURE_SUCCESS(rv, rv);
nsIDocument *doc = presShell->GetDocument();
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(doc);
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));
if (NS_SUCCEEDED(rv) && 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
{
nsIDOMElement *rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_FAILURE);
if (!nsTextEditUtils::IsBody(rootElement))
{
rv = docEncoder->SetContainerNode(rootElement);
NS_ENSURE_SUCCESS(rv, rv);
}
}
NS_ADDREF(*encoder = docEncoder);
return rv;
}
NS_IMETHODIMP
nsPlaintextEditor::OutputToString(const nsAString& aFormatType,
PRUint32 aFlags,
nsAString& aOutputString)
{
nsString resultString;
nsTextRulesInfo ruleInfo(nsTextEditRules::kOutputText);
ruleInfo.outString = &resultString;
// XXX Struct should store a nsAReadable*
nsAutoString str(aFormatType);
ruleInfo.outputFormat = &str;
PRBool 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));
if (NS_FAILED(rv))
return 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"))
{
PRBool docEmpty;
rv = GetDocumentIsEmpty(&docEmpty);
if (NS_FAILED(rv)) return rv;
if (docEmpty)
return NS_OK; // output nothing
}
nsCOMPtr<nsIDocumentEncoder> encoder;
rv = GetAndInitDocEncoder(aFormatType, aFlags, aCharset,
getter_AddRefs(encoder));
if (NS_FAILED(rv))
return rv;
return encoder->EncodeToStream(aOutputStream);
}
#ifdef XP_MAC
#pragma mark -
#pragma mark nsIEditorMailSupport overrides
#pragma mark -
#endif
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));
if (NS_FAILED(rv)) return 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)
{
// We have the text. Cite it appropriately:
nsCOMPtr<nsICiter> citer = new nsInternetCiter();
// Let the citer quote it for us:
nsString quotedStuff;
nsresult rv = citer->GetCiteString(aQuotedText, quotedStuff);
if (NS_FAILED(rv))
return 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));
if (NS_FAILED(rv)) return rv;
if (!selection) return 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);
PRBool cancel, handled;
rv = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
if (NS_FAILED(rv)) return 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,
PRBool aInsertHTML,
nsIDOMNode **aNodeInserted)
{
return InsertAsQuotation(aQuotedText, aNodeInserted);
}
nsresult
nsPlaintextEditor::SharedOutputString(PRUint32 aFlags,
PRBool* aIsCollapsed,
nsAString& aResult)
{
nsCOMPtr<nsISelection> selection;
nsresult rv = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(rv, rv);
if (!selection)
return 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(PRBool aRespectNewlines)
{
PRInt32 wrapCol;
nsresult rv = GetWrapWidth(&wrapCol);
if (NS_FAILED(rv))
return 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;
PRBool isCollapsed;
rv = SharedOutputString(nsIDocumentEncoder::OutputFormatted
| nsIDocumentEncoder::OutputLFLineBreak,
&isCollapsed, current);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsICiter> citer = new nsInternetCiter();
if (NS_FAILED(rv)) return rv;
if (!citer) return NS_ERROR_UNEXPECTED;
nsString wrapped;
PRUint32 firstLineOffset = 0; // XXX need to reset this if there is a selection
rv = citer->Rewrap(current, wrapCol, firstLineOffset, aRespectNewlines,
wrapped);
if (NS_FAILED(rv)) return 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;
PRBool isCollapsed;
nsresult rv = SharedOutputString(nsIDocumentEncoder::OutputFormatted,
&isCollapsed, current);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsICiter> citer = new nsInternetCiter();
if (!citer) return NS_ERROR_UNEXPECTED;
nsString stripped;
rv = citer->StripCites(current, stripped);
if (NS_FAILED(rv)) return rv;
if (isCollapsed) // rewrap the whole document
{
rv = SelectAll();
if (NS_FAILED(rv)) return rv;
}
return InsertText(stripped);
}
NS_IMETHODIMP
nsPlaintextEditor::GetEmbeddedObjects(nsISupportsArray** aNodeList)
{
*aNodeList = 0;
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark nsIEditorIMESupport overrides
#pragma mark -
#endif
NS_IMETHODIMP
nsPlaintextEditor::SetCompositionString(const nsAString& aCompositionString, nsIPrivateTextRangeList* aTextRangeList,nsTextEventReply* aReply)
{
if (!aTextRangeList && !aCompositionString.IsEmpty())
{
NS_ERROR("aTextRangeList is null but the composition string is not null");
return NS_ERROR_NULL_POINTER;
}
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps)
return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsISelection> selection;
nsresult result = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) return result;
nsRefPtr<nsCaret> caretP;
ps->GetCaret(getter_AddRefs(caretP));
// We should return caret position if it is possible. Because this event
// dispatcher always expects to be returned the correct caret position.
// But in following cases, we don't need to process the composition string,
// so, we only need to return the caret position.
// aCompositionString.IsEmpty() && !mIMETextNode:
// Workaround for Windows IME bug 23558: We get every IME event twice.
// For escape keypress, this causes an empty string to be passed
// twice, which freaks out the editor.
// aCompositionString.IsEmpty() && !aTextRangeList:
// Some Chinese IMEs for Linux are always composition string and text range
// list are empty when listing the Chinese characters. In this case,
// we don't need to process composition string too. See bug 271815.
if (!aCompositionString.IsEmpty() || (mIMETextNode && aTextRangeList))
{
mIMETextRangeList = aTextRangeList;
// XXX_kin: BEGIN HACK! HACK! HACK!
// XXX_kin:
// XXX_kin: This is lame! The IME stuff needs caret coordinates
// XXX_kin: synchronously, but the editor could be using async
// XXX_kin: updates (reflows and paints) for performance reasons.
// XXX_kin: In order to give IME what it needs, we have to temporarily
// XXX_kin: switch to sync updating during this call so that the
// XXX_kin: nsAutoPlaceHolderBatch can force sync reflows, paints,
// XXX_kin: and selection scrolling, so that we get back accurate
// XXX_kin: caret coordinates.
PRUint32 flags = 0;
PRBool restoreFlags = PR_FALSE;
if (NS_SUCCEEDED(GetFlags(&flags)) &&
(flags & nsIPlaintextEditor::eEditorUseAsyncUpdatesMask))
{
if (NS_SUCCEEDED(SetFlags(
flags & (~nsIPlaintextEditor::eEditorUseAsyncUpdatesMask))))
restoreFlags = PR_TRUE;
}
// XXX_kin: END HACK! HACK! HACK!
// we need the nsAutoPlaceHolderBatch destructor called before hitting
// GetCaretCoordinates so the states in Frame system sync with content
// therefore, we put the nsAutoPlaceHolderBatch into a inner block
{
nsAutoPlaceHolderBatch batch(this, nsGkAtoms::IMETxnName);
SetIsIMEComposing(); // We set mIsIMEComposing properly.
result = InsertText(aCompositionString);
mIMEBufferLength = aCompositionString.Length();
if (caretP)
caretP->SetCaretDOMSelection(selection);
// second part of 23558 fix:
if (aCompositionString.IsEmpty())
mIMETextNode = nsnull;
}
// XXX_kin: BEGIN HACK! HACK! HACK!
// XXX_kin:
// XXX_kin: Restore the previous set of flags!
if (restoreFlags)
SetFlags(flags);
// XXX_kin: END HACK! HACK! HACK!
}
if (caretP)
{
nsIView *view = nsnull;
nsRect rect;
result = caretP->GetCaretCoordinates(nsCaret::eRenderingViewCoordinates,
selection,
&rect,
&(aReply->mCursorIsCollapsed),
&view);
aReply->mCursorPosition =
rect.ToOutsidePixels(ps->GetPresContext()->AppUnitsPerDevPixel());
NS_ASSERTION(NS_SUCCEEDED(result), "cannot get caret position");
if (NS_SUCCEEDED(result) && view)
aReply->mReferenceWidget = view->GetWidget();
}
return result;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark nsEditor overrides
#pragma mark -
#endif
/** 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)
{
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()
{
// 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; }
// is doc empty?
PRBool bDocIsEmpty;
if (NS_SUCCEEDED(mRules->DocumentIsEmpty(&bDocIsEmpty)) && bDocIsEmpty)
{
// get root node
nsIDOMElement *rootElement = GetRoot();
if (!rootElement)
return NS_ERROR_FAILURE;
// if it's empty don't select entire doc - that would select the bogus node
return aSelection->Collapse(rootElement, 0);
}
return nsEditor::SelectEntireDocument(aSelection);
}
#ifdef XP_MAC
#pragma mark -
#pragma mark Random methods
#pragma mark -
#endif
nsresult
nsPlaintextEditor::SetAttributeOrEquivalent(nsIDOMElement * aElement,
const nsAString & aAttribute,
const nsAString & aValue,
PRBool aSuppressTransaction)
{
return nsEditor::SetAttribute(aElement, aAttribute, aValue);
}
nsresult
nsPlaintextEditor::RemoveAttributeOrEquivalent(nsIDOMElement * aElement,
const nsAString & aAttribute,
PRBool aSuppressTransaction)
{
return nsEditor::RemoveAttribute(aElement, aAttribute);
}
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