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gecko-dev/editor/base/nsTextEditRules.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "nsTextEditRules.h"
#include "nsEditor.h"
#include "nsCOMPtr.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMSelection.h"
#include "nsIDOMRange.h"
#include "nsIDOMCharacterData.h"
#include "nsIContent.h"
#include "nsIContentIterator.h"
#include "nsIEnumerator.h"
#include "nsLayoutCID.h"
#include "nsIEditProperty.h"
static NS_DEFINE_CID(kCContentIteratorCID, NS_CONTENTITERATOR_CID);
#define CANCEL_OPERATION_IF_READONLY_OR_DISABLED \
if ((mFlags & nsIHTMLEditor::eEditorReadonlyMask) || (mFlags & nsIHTMLEditor::eEditorDisabledMask)) \
{ \
*aCancel = PR_TRUE; \
return NS_OK; \
};
/********************************************************
* Constructor/Destructor
********************************************************/
nsTextEditRules::nsTextEditRules()
: mEditor(nsnull)
, mFlags(0) // initialized to 0 ("no flags set"). Real initial value is given in Init()
{
}
nsTextEditRules::~nsTextEditRules()
{
// do NOT delete mEditor here. We do not hold a ref count to mEditor. mEditor owns our lifespan.
}
/********************************************************
* Public methods
********************************************************/
NS_IMETHODIMP
nsTextEditRules::Init(nsHTMLEditor *aEditor, PRUint32 aFlags)
{
if (!aEditor) { return NS_ERROR_NULL_POINTER; }
mEditor = aEditor; // we hold a non-refcounted reference back to our editor
// call SetFlags only aftet mEditor has been initialized!
SetFlags(aFlags);
nsCOMPtr<nsIDOMSelection> selection;
mEditor->GetSelection(getter_AddRefs(selection));
NS_ASSERTION(selection, "editor cannot get selection");
nsresult res = CreateBogusNodeIfNeeded(selection); // this method handles null selection, which should never happen anyway
return res;
}
NS_IMETHODIMP
nsTextEditRules::GetFlags(PRUint32 *aFlags)
{
if (!aFlags) { return NS_ERROR_NULL_POINTER; }
*aFlags = mFlags;
return NS_OK;
}
// Initial style for plaintext
static char* PlaintextInitalStyle = "white-space: -moz-pre-wrap; width: 72ch; \
font-family: -moz-fixed; \
background-color: rgb(255, 255, 255)";
NS_IMETHODIMP
nsTextEditRules::SetFlags(PRUint32 aFlags)
{
if (mFlags == aFlags) return NS_OK;
// XXX - this won't work if body element already has
// a style attribute on it, don't know why.
// SetFlags() is really meant to only be called once
// and at editor init time.
if (aFlags & nsIHTMLEditor::eEditorPlaintextMask)
{
if (!(mFlags & nsIHTMLEditor::eEditorPlaintextMask))
{
// we are converting TO a plaintext editor
// put a "white-space: pre" style on the body
nsCOMPtr<nsIDOMElement> bodyElement;
nsresult res = mEditor->GetBodyElement(getter_AddRefs(bodyElement));
if (NS_FAILED(res)) return res;
if (!bodyElement) return NS_ERROR_NULL_POINTER;
// not going through the editor to do this.
// XXX This is not the right way to do this; we need an editor style
// system so that we can add & replace style attrs.
bodyElement->SetAttribute("style", PlaintextInitalStyle);
}
}
mFlags = aFlags;
return NS_OK;
}
NS_IMETHODIMP
nsTextEditRules::WillDoAction(nsIDOMSelection *aSelection,
nsRulesInfo *aInfo,
PRBool *aCancel,
PRBool *aHandled)
{
// null selection is legal
if (!aInfo || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
#if defined(DEBUG_ftang)
printf("nsTextEditRules::WillDoAction action= %d", aInfo->action);
#endif
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
// my kingdom for dynamic cast
nsTextRulesInfo *info = NS_STATIC_CAST(nsTextRulesInfo*, aInfo);
switch (info->action)
{
case kInsertBreak:
return WillInsertBreak(aSelection, aCancel, aHandled);
case kInsertText:
case kInsertTextIME:
return WillInsertText(aSelection,
aCancel,
aHandled,
info->inString,
info->outString,
info->typeInState,
info->maxLength);
case kDeleteSelection:
return WillDeleteSelection(aSelection, info->collapsedAction, aCancel, aHandled);
case kUndo:
return WillUndo(aSelection, aCancel, aHandled);
case kRedo:
return WillRedo(aSelection, aCancel, aHandled);
case kSetTextProperty:
return WillSetTextProperty(aSelection, aCancel, aHandled);
case kRemoveTextProperty:
return WillRemoveTextProperty(aSelection, aCancel, aHandled);
case kOutputText:
return WillOutputText(aSelection,
info->outputFormat,
info->outString,
aCancel,
aHandled);
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsTextEditRules::DidDoAction(nsIDOMSelection *aSelection,
nsRulesInfo *aInfo, nsresult aResult)
{
if (!aSelection || !aInfo)
return NS_ERROR_NULL_POINTER;
// my kingdom for dynamic cast
nsTextRulesInfo *info = NS_STATIC_CAST(nsTextRulesInfo*, aInfo);
switch (info->action)
{
case kInsertBreak:
return DidInsertBreak(aSelection, aResult);
case kInsertText:
case kInsertTextIME:
return DidInsertText(aSelection, aResult);
case kDeleteSelection:
return DidDeleteSelection(aSelection, info->collapsedAction, aResult);
case kUndo:
return DidUndo(aSelection, aResult);
case kRedo:
return DidRedo(aSelection, aResult);
case kSetTextProperty:
return DidSetTextProperty(aSelection, aResult);
case kRemoveTextProperty:
return DidRemoveTextProperty(aSelection, aResult);
case kOutputText:
return DidOutputText(aSelection, aResult);
}
// Don't fail on transactions we don't handle here!
return NS_OK;
}
NS_IMETHODIMP
nsTextEditRules::DocumentIsEmpty(PRBool *aDocumentIsEmpty)
{
if (!aDocumentIsEmpty)
return NS_ERROR_NULL_POINTER;
*aDocumentIsEmpty = (mBogusNode.get() != nsnull);
return NS_OK;
}
/********************************************************
* Protected methods
********************************************************/
nsresult
nsTextEditRules::WillInsert(nsIDOMSelection *aSelection, PRBool *aCancel)
{
if (!aSelection || !aCancel)
return NS_ERROR_NULL_POINTER;
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
// check for the magic content node and delete it if it exists
if (mBogusNode)
{
mEditor->DeleteNode(mBogusNode);
mBogusNode = do_QueryInterface(nsnull);
}
return NS_OK;
}
nsresult
nsTextEditRules::DidInsert(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::GetTopEnclosingPre(nsIDOMNode *aNode,
nsIDOMNode** aOutPreNode)
{
// check parms
if (!aNode || !aOutPreNode)
return NS_ERROR_NULL_POINTER;
*aOutPreNode = 0;
nsresult res = NS_OK;
nsCOMPtr<nsIDOMNode> node, parentNode;
node = do_QueryInterface(aNode);
while (node)
{
nsAutoString tag;
nsEditor::GetTagString(node, tag);
if (tag.Equals("pre", PR_TRUE))
*aOutPreNode = node;
else if (tag.Equals("body", PR_TRUE))
break;
res = node->GetParentNode(getter_AddRefs(parentNode));
if (NS_FAILED(res)) return res;
node = parentNode;
}
NS_IF_ADDREF(*aOutPreNode);
return res;
}
nsresult
nsTextEditRules::WillInsertBreak(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
*aHandled = PR_FALSE;
if (mFlags & nsIHTMLEditor::eEditorSingleLineMask) {
*aCancel = PR_TRUE;
}
else {
// Mail rule: split any <pre> tags in the way,
// since they're probably quoted text.
// For now, do this for all plaintext since mail is our main customer
// and we don't currently set eEditorMailMask for plaintext mail.
//if (mFlags & nsIHTMLEditor::eEditorMailMask)
{
nsCOMPtr<nsIDOMNode> preNode, selNode;
PRInt32 selOffset, newOffset;
nsresult res;
res = mEditor->GetStartNodeAndOffset(aSelection, &selNode, &selOffset);
if (NS_FAILED(res)) return res;
// If any of the following fail, then just proceed with the
// normal break insertion without worrying about the error
res = GetTopEnclosingPre(selNode, getter_AddRefs(preNode));
if (NS_SUCCEEDED(res) && preNode)
{
res = mEditor->SplitNodeDeep(preNode, selNode, selOffset, &newOffset);
if (NS_SUCCEEDED(res))
{
res = preNode->GetParentNode(getter_AddRefs(selNode));
if (NS_SUCCEEDED(res))
res = aSelection->Collapse(selNode, newOffset);
}
}
}
*aCancel = PR_FALSE;
}
return NS_OK;
}
nsresult
nsTextEditRules::DidInsertBreak(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillInsertText(nsIDOMSelection *aSelection,
PRBool *aCancel,
PRBool *aHandled,
const nsString *aInString,
nsString *aOutString,
TypeInState aTypeInState,
PRInt32 aMaxLength)
{
if (!aSelection || !aCancel || !aHandled || !aInString || !aOutString)
{return NS_ERROR_NULL_POINTER;}
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
nsresult res;
// initialize out params
*aCancel = PR_FALSE;
*aHandled = PR_TRUE;
*aOutString = *aInString;
// handle docs with a max length
res = TruncateInsertionIfNeeded(aSelection, aInString, aOutString, aMaxLength);
if (NS_FAILED(res)) return res;
// handle password field docs
if (mFlags & nsIHTMLEditor::eEditorPasswordMask)
{
res = EchoInsertionToPWBuff(aSelection, aOutString);
if (NS_FAILED(res)) return res;
}
// do text insertion
PRBool bCancel;
res = DoTextInsertion(aSelection, &bCancel, aOutString, aTypeInState);
return res;
}
nsresult
nsTextEditRules::DidInsertText(nsIDOMSelection *aSelection,
nsresult aResult)
{
return DidInsert(aSelection, aResult);
}
nsresult
nsTextEditRules::CreateStyleForInsertText(nsIDOMSelection *aSelection, TypeInState &aTypeInState)
{
// private method, we know aSelection is not null, and that it is collapsed
NS_ASSERTION(nsnull!=aSelection, "bad selection");
// We know at least one style is set and we're about to insert at least one character.
// If the selection is in a text node, split the node (even if we're at the beginning or end)
// then put the text node inside new inline style parents.
// Otherwise, create the text node and the new inline style parents.
nsCOMPtr<nsIDOMNode>anchor;
PRInt32 offset;
nsresult res = aSelection->GetAnchorNode( getter_AddRefs(anchor));
// createNewTextNode is a flag that tells us whether we need to create a new text node or not
PRBool createNewTextNode = PR_TRUE;
if (NS_SUCCEEDED(res) && NS_SUCCEEDED(aSelection->GetAnchorOffset(&offset)) && anchor)
{
nsCOMPtr<nsIDOMCharacterData>anchorAsText;
anchorAsText = do_QueryInterface(anchor);
if (anchorAsText)
{
createNewTextNode = PR_FALSE; // we found a text node, we'll base our insertion on it
nsCOMPtr<nsIDOMNode>newTextNode;
// create an empty text node by splitting the selected text node according to offset
if (0==offset)
{
res = mEditor->SplitNode(anchorAsText, offset, getter_AddRefs(newTextNode));
}
else
{
PRUint32 length;
anchorAsText->GetLength(&length);
if (length==(PRUint32)offset)
{
// newTextNode will be the left node
res = mEditor->SplitNode(anchorAsText, offset, getter_AddRefs(newTextNode));
// but we want the right node in this case
newTextNode = do_QueryInterface(anchor);
}
else
{
// splitting anchor twice sets newTextNode as an empty text node between
// two halves of the original text node
res = mEditor->SplitNode(anchorAsText, offset, getter_AddRefs(newTextNode));
if (NS_SUCCEEDED(res)) {
res = mEditor->SplitNode(anchorAsText, 0, getter_AddRefs(newTextNode));
}
}
}
// now we have the new text node we are going to insert into.
// create style nodes or move it up the content hierarchy as needed.
if ((NS_SUCCEEDED(res)) && newTextNode)
{
nsCOMPtr<nsIDOMNode>newStyleNode;
if (aTypeInState.IsSet(NS_TYPEINSTATE_BOLD))
{
if (PR_TRUE==aTypeInState.GetBold()) {
res = InsertStyleNode(newTextNode, nsIEditProperty::b, aSelection, getter_AddRefs(newStyleNode));
}
else
{
nsCOMPtr<nsIDOMNode>parent;
res = newTextNode->GetParentNode(getter_AddRefs(parent));
if (NS_FAILED(res)) return res;
if (!parent) return NS_ERROR_NULL_POINTER;
res = mEditor->RemoveTextPropertiesForNode (newTextNode, parent, 0, 0, nsIEditProperty::b, nsnull);
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_ITALIC))
{
if (PR_TRUE==aTypeInState.GetItalic()) {
res = InsertStyleNode(newTextNode, nsIEditProperty::i, aSelection, getter_AddRefs(newStyleNode));
}
else
{
nsCOMPtr<nsIDOMNode>parent;
res = newTextNode->GetParentNode(getter_AddRefs(parent));
if (NS_FAILED(res)) return res;
if (!parent) return NS_ERROR_NULL_POINTER;
res = mEditor->RemoveTextPropertiesForNode (newTextNode, parent, 0, 0, nsIEditProperty::i, nsnull);
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_UNDERLINE))
{
if (PR_TRUE==aTypeInState.GetUnderline()) {
res = InsertStyleNode(newTextNode, nsIEditProperty::u, aSelection, getter_AddRefs(newStyleNode));
}
else
{
nsCOMPtr<nsIDOMNode>parent;
res = newTextNode->GetParentNode(getter_AddRefs(parent));
if (NS_FAILED(res)) return res;
if (!parent) return NS_ERROR_NULL_POINTER;
res = mEditor->RemoveTextPropertiesForNode (newTextNode, parent, 0, 0, nsIEditProperty::u, nsnull);
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTCOLOR))
{
nsAutoString value;
aTypeInState.GetFontColor(value);
nsAutoString attr;
nsIEditProperty::color->ToString(attr);
res = CreateFontStyleForInsertText(newTextNode, attr, value, aSelection);
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTFACE))
{
nsAutoString value;
aTypeInState.GetFontFace(value);
nsAutoString attr;
nsIEditProperty::face->ToString(attr);
res = CreateFontStyleForInsertText(newTextNode, attr, value, aSelection);
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTSIZE))
{
nsAutoString value;
aTypeInState.GetFontSize(value);
nsAutoString attr;
nsIEditProperty::size->ToString(attr);
res = CreateFontStyleForInsertText(newTextNode, attr, value, aSelection);
}
}
}
}
// we have no text node, so create a new style tag(s) with a newly created text node in it
// this is a separate case from the code above because that code needs to handle turning
// properties on and off, this code only turns them on
if (PR_TRUE==createNewTextNode)
{
offset = 0;
nsCOMPtr<nsIDOMNode>parent = do_QueryInterface(anchor);
if (parent)
{ // we have a selection, get the offset within the parent
res = aSelection->GetAnchorOffset(&offset);
if (NS_FAILED(res)) { return res; }
}
else
{
nsCOMPtr<nsIDOMElement> bodyElement;
res = mEditor->GetBodyElement(getter_AddRefs(bodyElement));
if (NS_FAILED(res)) return res;
if (!bodyElement) return NS_ERROR_NULL_POINTER;
parent = do_QueryInterface(bodyElement);
// offset already set to 0
}
if (!parent) { return NS_ERROR_NULL_POINTER; }
nsAutoString attr, value;
// now we've got the parent. insert the style tag(s)
if (aTypeInState.IsSet(NS_TYPEINSTATE_BOLD))
{
if (PR_TRUE==aTypeInState.GetBold()) {
res = InsertStyleAndNewTextNode(parent, offset,
nsIEditProperty::b, attr, value,
aSelection);
if (NS_FAILED(res)) { return res; }
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_ITALIC))
{
if (PR_TRUE==aTypeInState.GetItalic()) {
res = InsertStyleAndNewTextNode(parent, offset,
nsIEditProperty::i, attr, value,
aSelection);
if (NS_FAILED(res)) { return res; }
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_UNDERLINE))
{
if (PR_TRUE==aTypeInState.GetUnderline()) {
res = InsertStyleAndNewTextNode(parent, offset,
nsIEditProperty::u, attr, value,
aSelection);
if (NS_FAILED(res)) { return res; }
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTCOLOR))
{
aTypeInState.GetFontColor(value);
nsIEditProperty::color->ToString(attr);
res = InsertStyleAndNewTextNode(parent, offset,
nsIEditProperty::font, attr, value,
aSelection);
if (NS_FAILED(res)) { return res; }
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTFACE))
{
aTypeInState.GetFontFace(value);
nsIEditProperty::face->ToString(attr);
res = InsertStyleAndNewTextNode(parent, offset,
nsIEditProperty::font, attr, value,
aSelection);
if (NS_FAILED(res)) { return res; }
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTSIZE))
{
aTypeInState.GetFontSize(value);
nsIEditProperty::size->ToString(attr);
res = InsertStyleAndNewTextNode(parent, offset,
nsIEditProperty::font, attr, value,
aSelection);
if (NS_FAILED(res)) { return res; }
}
}
return res;
}
nsresult
nsTextEditRules::CreateFontStyleForInsertText(nsIDOMNode *aNewTextNode,
const nsString &aAttr,
const nsString &aValue,
nsIDOMSelection *aSelection)
{
nsresult res = NS_OK;
nsCOMPtr<nsIDOMNode>newStyleNode;
if (0!=aValue.Length())
{
res = InsertStyleNode(aNewTextNode, nsIEditProperty::font, aSelection, getter_AddRefs(newStyleNode));
if (NS_FAILED(res)) return res;
if (!newStyleNode) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMElement>element = do_QueryInterface(newStyleNode);
if (element) {
res = mEditor->SetAttribute(element, aAttr, aValue);
}
}
else
{
nsCOMPtr<nsIDOMNode>parent;
res = aNewTextNode->GetParentNode(getter_AddRefs(parent));
if (NS_FAILED(res)) return res;
if (!parent) return NS_ERROR_NULL_POINTER;
res = mEditor->RemoveTextPropertiesForNode (aNewTextNode, parent, 0, 0, nsIEditProperty::font, &aAttr);
}
return res;
}
nsresult
nsTextEditRules::InsertStyleNode(nsIDOMNode *aNode,
nsIAtom *aTag,
nsIDOMSelection *aSelection,
nsIDOMNode **aNewNode)
{
NS_ASSERTION(aNode && aTag, "bad args");
if (!aNode || !aTag) { return NS_ERROR_NULL_POINTER; }
nsresult res;
nsCOMPtr<nsIDOMNode>parent;
res = aNode->GetParentNode(getter_AddRefs(parent));
if (NS_FAILED(res)) return res;
if (!parent) return NS_ERROR_NULL_POINTER;
nsAutoString tag;
aTag->ToString(tag);
if (PR_FALSE == mEditor->CanContainTag(parent, tag)) {
NS_ASSERTION(PR_FALSE, "bad use of InsertStyleNode");
return NS_ERROR_FAILURE; // illegal place to insert the style tag
}
PRInt32 offsetInParent;
res = nsEditor::GetChildOffset(aNode, parent, offsetInParent);
if (NS_FAILED(res)) return res;
res = mEditor->CreateNode(tag, parent, offsetInParent, aNewNode);
if (NS_FAILED(res)) return res;
if (!aNewNode) return NS_ERROR_NULL_POINTER;
res = mEditor->DeleteNode(aNode);
if (NS_SUCCEEDED(res))
{
res = mEditor->InsertNode(aNode, *aNewNode, 0);
if (NS_SUCCEEDED(res)) {
if (aSelection) {
res = aSelection->Collapse(aNode, 0);
}
}
}
return res;
}
nsresult
nsTextEditRules::InsertStyleAndNewTextNode(nsIDOMNode *aParentNode,
PRInt32 aOffset,
nsIAtom *aTag,
const nsString &aAttr,
const nsString &aValue,
nsIDOMSelection *aInOutSelection)
{
NS_ASSERTION(aParentNode && aTag, "bad args");
if (!aParentNode || !aTag) { return NS_ERROR_NULL_POINTER; }
nsresult res;
// if the selection already points to a text node, just call InsertStyleNode()
if (aInOutSelection)
{
PRBool isCollapsed;
aInOutSelection->GetIsCollapsed(&isCollapsed);
if (PR_TRUE==isCollapsed)
{
nsCOMPtr<nsIDOMNode>anchor;
PRInt32 offset;
res = aInOutSelection->GetAnchorNode(getter_AddRefs(anchor));
if (NS_FAILED(res)) return res;
if (!anchor) return NS_ERROR_NULL_POINTER;
res = aInOutSelection->GetAnchorOffset(&offset); // remember where we were
if (NS_FAILED(res)) return res;
// if we have a text node, just wrap it in a new style node
if (PR_TRUE==mEditor->IsTextNode(anchor))
{
nsCOMPtr<nsIDOMNode> newStyleNode;
res = InsertStyleNode(anchor, aTag, aInOutSelection, getter_AddRefs(newStyleNode));
if (NS_FAILED(res)) { return res; }
if (!newStyleNode) { return NS_ERROR_NULL_POINTER; }
// if we were given an attribute, set it on the new style node
PRInt32 attrLength = aAttr.Length();
if (0!=attrLength)
{
nsCOMPtr<nsIDOMElement>newStyleElement = do_QueryInterface(newStyleNode);
res = mEditor->SetAttribute(newStyleElement, aAttr, aValue);
}
if (NS_SUCCEEDED(res)) {
res = aInOutSelection->Collapse(anchor, offset);
}
return res; // we return here because we used the text node passed into us via collapsed selection
}
}
}
// if we get here, there is no selected text node so we create one.
// first, create the style node
nsAutoString tag;
aTag->ToString(tag);
if (PR_FALSE == mEditor->CanContainTag(aParentNode, tag)) {
NS_ASSERTION(PR_FALSE, "bad use of InsertStyleAndNewTextNode");
return NS_ERROR_FAILURE; // illegal place to insert the style tag
}
nsCOMPtr<nsIDOMNode>newStyleNode;
nsCOMPtr<nsIDOMNode>newTextNode;
res = mEditor->CreateNode(tag, aParentNode, aOffset, getter_AddRefs(newStyleNode));
if (NS_FAILED(res)) return res;
if (!newStyleNode) return NS_ERROR_NULL_POINTER;
// if we were given an attribute, set it on the new style node
PRInt32 attrLength = aAttr.Length();
if (0!=attrLength)
{
nsCOMPtr<nsIDOMElement>newStyleElement = do_QueryInterface(newStyleNode);
res = mEditor->SetAttribute(newStyleElement, aAttr, aValue);
if (NS_FAILED(res)) return res;
}
// then create the text node
nsAutoString textNodeTag;
res = nsEditor::GetTextNodeTag(textNodeTag);
if (NS_FAILED(res)) { return res; }
res = mEditor->CreateNode(textNodeTag, newStyleNode, 0, getter_AddRefs(newTextNode));
if (NS_FAILED(res)) return res;
if (!newTextNode) return NS_ERROR_NULL_POINTER;
// if we have a selection collapse the selection to the beginning of the new text node
if (aInOutSelection) {
res = aInOutSelection->Collapse(newTextNode, 0);
}
return res;
}
nsresult
nsTextEditRules::WillSetTextProperty(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled)
{ return NS_ERROR_NULL_POINTER; }
nsresult res = NS_OK;
// XXX: should probably return a success value other than NS_OK that means "not allowed"
if (nsIHTMLEditor::eEditorPlaintextMask & mFlags) {
*aCancel = PR_TRUE;
}
return res;
}
nsresult
nsTextEditRules::DidSetTextProperty(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillRemoveTextProperty(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled)
{ return NS_ERROR_NULL_POINTER; }
nsresult res = NS_OK;
// XXX: should probably return a success value other than NS_OK that means "not allowed"
if (nsIHTMLEditor::eEditorPlaintextMask & mFlags) {
*aCancel = PR_TRUE;
}
return res;
}
nsresult
nsTextEditRules::DidRemoveTextProperty(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillDeleteSelection(nsIDOMSelection *aSelection,
nsIEditor::ESelectionCollapseDirection aCollapsedAction,
PRBool *aCancel,
PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
// if there is only bogus content, cancel the operation
if (mBogusNode) {
*aCancel = PR_TRUE;
return NS_OK;
}
if (mFlags & nsIHTMLEditor::eEditorPasswordMask)
{
// manage the password buffer
PRInt32 start, end;
mEditor->GetTextSelectionOffsets(aSelection, start, end);
if (end==start)
{ // collapsed selection
if (nsIEditor::eDeletePrevious==aCollapsedAction && 0<start) { // del back
mPasswordText.Cut(start-1, 1);
}
else if (nsIEditor::eDeleteNext==aCollapsedAction) { // del forward
mPasswordText.Cut(start, 1);
}
// otherwise nothing to do for this collapsed selection
}
else { // extended selection
mPasswordText.Cut(start, end-start);
}
#ifdef DEBUG_buster
char *password = mPasswordText.ToNewCString();
printf("mPasswordText is %s\n", password);
nsCRT::free(password);
#endif
}
return NS_OK;
}
// if the document is empty, insert a bogus text node with a &nbsp;
// if we ended up with consecutive text nodes, merge them
nsresult
nsTextEditRules::DidDeleteSelection(nsIDOMSelection *aSelection,
nsIEditor::ESelectionCollapseDirection aCollapsedAction,
nsresult aResult)
{
nsresult res = aResult; // if aResult is an error, we just return it
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
PRBool isCollapsed;
aSelection->GetIsCollapsed(&isCollapsed);
NS_ASSERTION(PR_TRUE==isCollapsed, "selection not collapsed after delete selection.");
// if the delete selection resulted in no content
// insert a special bogus text node with a &nbsp; character in it.
if (NS_SUCCEEDED(res)) // only do this work if DeleteSelection completed successfully
{
res = CreateBogusNodeIfNeeded(aSelection);
// if we don't have an empty document, check the selection to see if any collapsing is necessary
if (!mBogusNode)
{
nsCOMPtr<nsIDOMNode>anchor;
PRInt32 offset;
res = aSelection->GetAnchorNode(getter_AddRefs(anchor));
if (NS_FAILED(res)) return res;
if (!anchor) return NS_ERROR_NULL_POINTER;
res = aSelection->GetAnchorOffset(&offset);
if (NS_FAILED(res)) return res;
nsCOMPtr<nsIDOMNodeList> anchorChildren;
res = anchor->GetChildNodes(getter_AddRefs(anchorChildren));
nsCOMPtr<nsIDOMNode> selectedNode;
if ((NS_SUCCEEDED(res)) && anchorChildren) {
res = anchorChildren->Item(offset, getter_AddRefs(selectedNode));
}
else {
selectedNode = do_QueryInterface(anchor);
}
if ((NS_SUCCEEDED(res)) && selectedNode)
{
nsCOMPtr<nsIDOMCharacterData>selectedNodeAsText;
selectedNodeAsText = do_QueryInterface(selectedNode);
if (selectedNodeAsText)
{
nsCOMPtr<nsIDOMNode> siblingNode;
selectedNode->GetPreviousSibling(getter_AddRefs(siblingNode));
if (siblingNode)
{
nsCOMPtr<nsIDOMCharacterData>siblingNodeAsText;
siblingNodeAsText = do_QueryInterface(siblingNode);
if (siblingNodeAsText)
{
PRUint32 siblingLength; // the length of siblingNode before the join
siblingNodeAsText->GetLength(&siblingLength);
nsCOMPtr<nsIDOMNode> parentNode;
res = selectedNode->GetParentNode(getter_AddRefs(parentNode));
if (NS_FAILED(res)) return res;
if (!parentNode) return NS_ERROR_NULL_POINTER;
res = mEditor->JoinNodes(siblingNode, selectedNode, parentNode);
// selectedNode will remain after the join, siblingNode is removed
}
}
selectedNode->GetNextSibling(getter_AddRefs(siblingNode));
if (siblingNode)
{
nsCOMPtr<nsIDOMCharacterData>siblingNodeAsText;
siblingNodeAsText = do_QueryInterface(siblingNode);
if (siblingNodeAsText)
{
PRUint32 selectedNodeLength; // the length of siblingNode before the join
selectedNodeAsText->GetLength(&selectedNodeLength);
nsCOMPtr<nsIDOMNode> parentNode;
res = selectedNode->GetParentNode(getter_AddRefs(parentNode));
if (NS_FAILED(res)) return res;
if (!parentNode) return NS_ERROR_NULL_POINTER;
res = mEditor->JoinNodes(selectedNode, siblingNode, parentNode);
if (NS_FAILED(res)) return res;
// selectedNode will remain after the join, siblingNode is removed
// set selection
res = aSelection->Collapse(siblingNode, selectedNodeLength);
}
}
}
}
}
}
return res;
}
nsresult
nsTextEditRules::WillUndo(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
return NS_OK;
}
/* the idea here is to see if the magic empty node has suddenly reappeared as the res of the undo.
* if it has, set our state so we remember it.
* There is a tradeoff between doing here and at redo, or doing it everywhere else that might care.
* Since undo and redo are relatively rare, it makes sense to take the (small) performance hit here.
*/
nsresult
nsTextEditRules:: DidUndo(nsIDOMSelection *aSelection, nsresult aResult)
{
nsresult res = aResult; // if aResult is an error, we return it.
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (NS_SUCCEEDED(res))
{
if (mBogusNode) {
mBogusNode = do_QueryInterface(nsnull);
}
else
{
nsCOMPtr<nsIDOMElement> theBody;
res = mEditor->GetBodyElement(getter_AddRefs(theBody));
if (NS_FAILED(res)) return res;
if (!theBody) return NS_ERROR_FAILURE;
nsAutoString tagName("div");
nsCOMPtr<nsIDOMNodeList> nodeList;
res = theBody->GetElementsByTagName(tagName, getter_AddRefs(nodeList));
if (NS_FAILED(res)) return res;
if (nodeList)
{
PRUint32 len;
nodeList->GetLength(&len);
if (len != 1) return NS_OK; // only in the case of one div could there be the bogus node
nsCOMPtr<nsIDOMNode>node;
nsCOMPtr<nsIDOMElement>element;
nodeList->Item(0, getter_AddRefs(node));
if (!node) return NS_ERROR_NULL_POINTER;
element = do_QueryInterface(node);
if (element)
{
nsAutoString att(nsEditor::kMOZEditorBogusNodeAttr);
nsAutoString val;
(void)element->GetAttribute(att, val);
if (val.Equals(nsEditor::kMOZEditorBogusNodeValue))
{
mBogusNode = do_QueryInterface(element);
}
}
}
}
}
return res;
}
nsresult
nsTextEditRules::WillRedo(nsIDOMSelection *aSelection, PRBool *aCancel, PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
return NS_OK;
}
nsresult
nsTextEditRules::DidRedo(nsIDOMSelection *aSelection, nsresult aResult)
{
nsresult res = aResult; // if aResult is an error, we return it.
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (NS_SUCCEEDED(res))
{
if (mBogusNode) {
mBogusNode = do_QueryInterface(nsnull);
}
else
{
nsCOMPtr<nsIDOMElement> theBody;
res = mEditor->GetBodyElement(getter_AddRefs(theBody));
if (NS_FAILED(res)) return res;
if (!theBody) return NS_ERROR_FAILURE;
nsAutoString tagName("div");
nsCOMPtr<nsIDOMNodeList> nodeList;
res = theBody->GetElementsByTagName(tagName, getter_AddRefs(nodeList));
if (NS_FAILED(res)) return res;
if (nodeList)
{
PRUint32 len;
nodeList->GetLength(&len);
if (len != 1) return NS_OK; // only in the case of one div could there be the bogus node
nsCOMPtr<nsIDOMNode>node;
nsCOMPtr<nsIDOMElement>element;
nodeList->Item(0, getter_AddRefs(node));
if (!node) return NS_ERROR_NULL_POINTER;
element = do_QueryInterface(node);
if (element)
{
nsAutoString att(nsEditor::kMOZEditorBogusNodeAttr);
nsAutoString val;
(void)element->GetAttribute(att, val);
if (val.Equals(nsEditor::kMOZEditorBogusNodeValue))
{
mBogusNode = do_QueryInterface(element);
}
}
}
}
}
return res;
}
nsresult
nsTextEditRules::WillOutputText(nsIDOMSelection *aSelection,
const nsString *aOutputFormat,
nsString *aOutString,
PRBool *aCancel,
PRBool *aHandled)
{
// null selection ok
if (!aOutString || !aOutputFormat || !aCancel || !aHandled)
{ return NS_ERROR_NULL_POINTER; }
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
if (PR_TRUE == aOutputFormat->Equals("text/plain"))
{ // only use these rules for plain text output
if (mFlags & nsIHTMLEditor::eEditorPasswordMask)
{
*aOutString = mPasswordText;
*aHandled = PR_TRUE;
}
else if (mBogusNode)
{ // this means there's no content, so output null string
*aOutString = "";
*aHandled = PR_TRUE;
}
}
return NS_OK;
}
nsresult
nsTextEditRules::DidOutputText(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::CreateBogusNodeIfNeeded(nsIDOMSelection *aSelection)
{
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (!mEditor) { return NS_ERROR_NULL_POINTER; }
if (mBogusNode) return NS_OK; // let's not create more than one, ok?
nsCOMPtr<nsIDOMElement> bodyElement;
nsresult res = mEditor->GetBodyElement(getter_AddRefs(bodyElement));
if (NS_FAILED(res)) return res;
if (!bodyElement) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMNode>bodyNode = do_QueryInterface(bodyElement);
// now we've got the body tag.
// iterate the body tag, looking for editable content
// if no editable content is found, insert the bogus node
PRBool needsBogusContent=PR_TRUE;
nsCOMPtr<nsIDOMNode>bodyChild;
res = bodyNode->GetFirstChild(getter_AddRefs(bodyChild));
while ((NS_SUCCEEDED(res)) && bodyChild)
{
if (PR_TRUE==mEditor->IsEditable(bodyChild))
{
needsBogusContent = PR_FALSE;
break;
}
nsCOMPtr<nsIDOMNode>temp;
bodyChild->GetNextSibling(getter_AddRefs(temp));
bodyChild = do_QueryInterface(temp);
}
if (PR_TRUE==needsBogusContent)
{
// set mBogusNode to be the newly created <br>
res = mEditor->CreateNode(nsAutoString("br"), bodyNode, 0,
getter_AddRefs(mBogusNode));
if (NS_FAILED(res)) return res;
if (!mBogusNode) return NS_ERROR_NULL_POINTER;
// give it a special attribute
nsCOMPtr<nsIDOMElement>newPElement;
newPElement = do_QueryInterface(mBogusNode);
if (newPElement)
{
nsAutoString att(nsEditor::kMOZEditorBogusNodeAttr);
nsAutoString val(nsEditor::kMOZEditorBogusNodeValue);
newPElement->SetAttribute(att, val);
}
}
return res;
}
nsresult
nsTextEditRules::TruncateInsertionIfNeeded(nsIDOMSelection *aSelection,
const nsString *aInString,
nsString *aOutString,
PRInt32 aMaxLength)
{
if (!aSelection || !aInString || !aOutString) {return NS_ERROR_NULL_POINTER;}
nsresult res = NS_OK;
*aOutString = *aInString;
if ((-1 != aMaxLength) && (mFlags & nsIHTMLEditor::eEditorPlaintextMask))
{
// Get the current text length.
// Get the length of inString.
// Get the length of the selection.
// If selection is collapsed, it is length 0.
// Subtract the length of the selection from the len(doc)
// since we'll delete the selection on insert.
// This is resultingDocLength.
// If (resultingDocLength) is at or over max, cancel the insert
// If (resultingDocLength) + (length of input) > max,
// set aOutString to subset of inString so length = max
PRInt32 docLength;
res = mEditor->GetDocumentLength(&docLength);
if (NS_FAILED(res)) { return res; }
PRInt32 start, end;
res = mEditor->GetTextSelectionOffsets(aSelection, start, end);
if (NS_FAILED(res)) { return res; }
PRInt32 selectionLength = end-start;
if (selectionLength<0) { selectionLength *= (-1); }
PRInt32 resultingDocLength = docLength - selectionLength;
if (resultingDocLength >= aMaxLength)
{
*aOutString = "";
return res;
}
else
{
PRInt32 inCount = aOutString->Length();
if ((inCount+resultingDocLength) > aMaxLength)
{
aOutString->Truncate(aMaxLength-resultingDocLength);
}
}
}
return res;
}
nsresult
nsTextEditRules::EchoInsertionToPWBuff(nsIDOMSelection *aSelection, nsString *aOutString)
{
if (!aSelection || !aOutString) {return NS_ERROR_NULL_POINTER;}
// manage the password buffer
PRInt32 start, end;
nsresult res = mEditor->GetTextSelectionOffsets(aSelection, start, end);
NS_ASSERTION((NS_SUCCEEDED(res)), "getTextSelectionOffsets failed!");
if (end!=start)
{
mPasswordText.Cut(start, end-start);
}
mPasswordText.Insert(*aOutString, start);
#ifdef DEBUG_jfrancis
char *password = mPasswordText.ToNewCString();
printf("mPasswordText is %s\n", password);
nsCRT::free(password);
#endif
// change the output to '*' only
PRInt32 length = aOutString->Length();
PRInt32 i;
*aOutString = "";
for (i=0; i<length; i++)
*aOutString += '*';
return res;
}
nsresult
nsTextEditRules::DoTextInsertion(nsIDOMSelection *aSelection,
PRBool *aCancel,
const nsString *aInString,
TypeInState aTypeInState)
{
if (!aSelection || !aCancel || !aInString) {return NS_ERROR_NULL_POINTER;}
nsresult res = NS_OK;
// for now, we always cancel editor handling of insert text.
// rules code always does the insertion
*aCancel = PR_TRUE;
PRBool bCancel;
res = WillInsert(aSelection, &bCancel);
if (NS_SUCCEEDED(res) && (!bCancel))
{
if (PR_TRUE==aTypeInState.IsAnySet())
{ // for every property that is set, insert a new inline style node
res = CreateStyleForInsertText(aSelection, aTypeInState);
if (NS_FAILED(res)) { return res; }
}
res = mEditor->InsertTextImpl(*aInString);
}
return res;
}
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