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348 lines
12 KiB
C++
348 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Original Author: Daniel Glazman <glazman@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "ChangeCSSInlineStyleTxn.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMCSSStyleDeclaration.h"
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#include "nsIDOMElementCSSInlineStyle.h"
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#include "nsReadableUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsCRT.h"
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#include "nsIAtom.h"
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#include "nsGkAtoms.h"
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#define kNullCh (PRUnichar('\0'))
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NS_IMPL_CYCLE_COLLECTION_CLASS(ChangeCSSInlineStyleTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(ChangeCSSInlineStyleTxn,
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EditTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mElement)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(ChangeCSSInlineStyleTxn,
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EditTxn)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ChangeCSSInlineStyleTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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// answers true if aValue is in the string list of white-space separated values aValueList
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// a case-sensitive search is performed if aCaseSensitive is true
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bool
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ChangeCSSInlineStyleTxn::ValueIncludes(const nsAString &aValueList, const nsAString &aValue, bool aCaseSensitive)
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{
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nsAutoString valueList(aValueList);
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bool result = false;
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valueList.Append(kNullCh); // put an extra null at the end
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PRUnichar *value = ToNewUnicode(aValue);
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PRUnichar *start = valueList.BeginWriting();
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PRUnichar *end = start;
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while (kNullCh != *start) {
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while ((kNullCh != *start) && nsCRT::IsAsciiSpace(*start)) { // skip leading space
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start++;
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}
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end = start;
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while ((kNullCh != *end) && (false == nsCRT::IsAsciiSpace(*end))) { // look for space or end
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end++;
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}
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*end = kNullCh; // end string here
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if (start < end) {
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if (aCaseSensitive) {
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if (!nsCRT::strcmp(value, start)) {
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result = true;
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break;
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}
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}
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else {
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if (nsDependentString(value).Equals(nsDependentString(start),
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nsCaseInsensitiveStringComparator())) {
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result = true;
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break;
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}
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}
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}
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start = ++end;
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}
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NS_Free(value);
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return result;
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}
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// removes the value aRemoveValue from the string list of white-space separated values aValueList
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void
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ChangeCSSInlineStyleTxn::RemoveValueFromListOfValues(nsAString & aValues, const nsAString & aRemoveValue)
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{
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nsAutoString classStr(aValues); // copy to work buffer nsAutoString rv(aRemoveValue);
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nsAutoString outString;
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classStr.Append(kNullCh); // put an extra null at the end
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PRUnichar *start = classStr.BeginWriting();
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PRUnichar *end = start;
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while (kNullCh != *start) {
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while ((kNullCh != *start) && nsCRT::IsAsciiSpace(*start)) { // skip leading space
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start++;
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}
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end = start;
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while ((kNullCh != *end) && (false == nsCRT::IsAsciiSpace(*end))) { // look for space or end
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end++;
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}
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*end = kNullCh; // end string here
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if (start < end) {
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if (!aRemoveValue.Equals(start)) {
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outString.Append(start);
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outString.Append(PRUnichar(' '));
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}
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}
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start = ++end;
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}
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aValues.Assign(outString);
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}
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ChangeCSSInlineStyleTxn::ChangeCSSInlineStyleTxn()
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: EditTxn()
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{
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}
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NS_IMETHODIMP ChangeCSSInlineStyleTxn::Init(nsIEditor *aEditor,
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nsIDOMElement *aElement,
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nsIAtom *aProperty,
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const nsAString& aValue,
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bool aRemoveProperty)
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{
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NS_ASSERTION(aEditor && aElement, "bad arg");
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if (!aEditor || !aElement) { return NS_ERROR_NULL_POINTER; }
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mEditor = aEditor;
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mElement = do_QueryInterface(aElement);
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mProperty = aProperty;
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NS_ADDREF(mProperty);
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mValue.Assign(aValue);
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mRemoveProperty = aRemoveProperty;
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mUndoAttributeWasSet = false;
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mRedoAttributeWasSet = false;
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mUndoValue.Truncate();
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mRedoValue.Truncate();
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return NS_OK;
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}
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NS_IMETHODIMP ChangeCSSInlineStyleTxn::DoTransaction(void)
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{
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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nsCOMPtr<nsIDOMElementCSSInlineStyle> inlineStyles = do_QueryInterface(mElement);
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NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
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nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
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nsresult result = inlineStyles->GetStyle(getter_AddRefs(cssDecl));
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NS_ENSURE_SUCCESS(result, result);
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NS_ENSURE_TRUE(cssDecl, NS_ERROR_NULL_POINTER);
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nsAutoString propertyNameString;
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mProperty->ToString(propertyNameString);
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NS_NAMED_LITERAL_STRING(styleAttr, "style");
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result = mElement->HasAttribute(styleAttr, &mUndoAttributeWasSet);
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NS_ENSURE_SUCCESS(result, result);
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nsAutoString values;
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result = cssDecl->GetPropertyValue(propertyNameString, values);
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NS_ENSURE_SUCCESS(result, result);
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mUndoValue.Assign(values);
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// does this property accept more than 1 value ?
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// we need to know that because of bug 62682
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bool multiple = AcceptsMoreThanOneValue(mProperty);
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if (mRemoveProperty) {
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nsAutoString returnString;
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if (multiple) {
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// the property can have more than one value, let's remove only
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// the value we have to remove and not the others
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// the 2 lines below are a workaround because nsDOMCSSDeclaration::GetPropertyCSSValue
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// is not yet implemented (bug 62682)
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RemoveValueFromListOfValues(values, NS_LITERAL_STRING("none"));
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RemoveValueFromListOfValues(values, mValue);
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if (values.IsEmpty()) {
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result = cssDecl->RemoveProperty(propertyNameString, returnString);
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NS_ENSURE_SUCCESS(result, result);
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}
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else {
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nsAutoString priority;
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result = cssDecl->GetPropertyPriority(propertyNameString, priority);
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NS_ENSURE_SUCCESS(result, result);
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result = cssDecl->SetProperty(propertyNameString, values,
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priority);
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NS_ENSURE_SUCCESS(result, result);
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}
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}
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else {
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result = cssDecl->RemoveProperty(propertyNameString, returnString);
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NS_ENSURE_SUCCESS(result, result);
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}
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}
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else {
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nsAutoString priority;
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result = cssDecl->GetPropertyPriority(propertyNameString, priority);
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NS_ENSURE_SUCCESS(result, result);
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if (multiple) {
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// the property can have more than one value, let's add
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// the value we have to add to the others
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// the line below is a workaround because nsDOMCSSDeclaration::GetPropertyCSSValue
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// is not yet implemented (bug 62682)
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AddValueToMultivalueProperty(values, mValue);
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}
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else
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values.Assign(mValue);
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result = cssDecl->SetProperty(propertyNameString, values,
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priority);
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NS_ENSURE_SUCCESS(result, result);
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}
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// let's be sure we don't keep an empty style attribute
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PRUint32 length;
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result = cssDecl->GetLength(&length);
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NS_ENSURE_SUCCESS(result, result);
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if (!length) {
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result = mElement->RemoveAttribute(styleAttr);
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NS_ENSURE_SUCCESS(result, result);
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}
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else
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mRedoAttributeWasSet = true;
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return cssDecl->GetPropertyValue(propertyNameString, mRedoValue);
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}
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nsresult ChangeCSSInlineStyleTxn::SetStyle(bool aAttributeWasSet,
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nsAString & aValue)
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{
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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nsresult result = NS_OK;
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if (aAttributeWasSet) {
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// the style attribute was set and not empty, let's recreate the declaration
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nsAutoString propertyNameString;
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mProperty->ToString(propertyNameString);
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nsCOMPtr<nsIDOMElementCSSInlineStyle> inlineStyles = do_QueryInterface(mElement);
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NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
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nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
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result = inlineStyles->GetStyle(getter_AddRefs(cssDecl));
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NS_ENSURE_SUCCESS(result, result);
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NS_ENSURE_TRUE(cssDecl, NS_ERROR_NULL_POINTER);
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if (aValue.IsEmpty()) {
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// an empty value means we have to remove the property
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nsAutoString returnString;
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result = cssDecl->RemoveProperty(propertyNameString, returnString);
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}
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else {
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// let's recreate the declaration as it was
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nsAutoString priority;
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result = cssDecl->GetPropertyPriority(propertyNameString, priority);
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NS_ENSURE_SUCCESS(result, result);
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result = cssDecl->SetProperty(propertyNameString, aValue, priority);
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}
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}
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else
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result = mElement->RemoveAttribute(NS_LITERAL_STRING("style"));
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return result;
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}
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NS_IMETHODIMP ChangeCSSInlineStyleTxn::UndoTransaction(void)
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{
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return SetStyle(mUndoAttributeWasSet, mUndoValue);
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}
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NS_IMETHODIMP ChangeCSSInlineStyleTxn::RedoTransaction(void)
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{
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return SetStyle(mRedoAttributeWasSet, mRedoValue);
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}
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NS_IMETHODIMP ChangeCSSInlineStyleTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("ChangeCSSInlineStyleTxn: [mRemoveProperty == ");
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if (!mRemoveProperty)
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aString.AppendLiteral("false] ");
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else
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aString.AppendLiteral("true] ");
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nsAutoString tempString;
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mProperty->ToString(tempString);
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aString += tempString;
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return NS_OK;
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}
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// answers true if the CSS property accepts more than one value
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bool
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ChangeCSSInlineStyleTxn::AcceptsMoreThanOneValue(nsIAtom *aCSSProperty)
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{
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return aCSSProperty == nsGkAtoms::text_decoration;
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}
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// adds the value aNewValue to the list of white-space separated values aValues
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NS_IMETHODIMP
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ChangeCSSInlineStyleTxn::AddValueToMultivalueProperty(nsAString & aValues, const nsAString & aNewValue)
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{
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if (aValues.IsEmpty()
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|| aValues.LowerCaseEqualsLiteral("none")) {
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// the list of values is empty of the value is 'none'
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aValues.Assign(aNewValue);
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}
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else if (!ValueIncludes(aValues, aNewValue, false)) {
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// we already have another value but not this one; add it
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aValues.Append(PRUnichar(' '));
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aValues.Append(aNewValue);
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}
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return NS_OK;
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}
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