зеркало из https://github.com/mozilla/gecko-dev.git
new Transaction for CSS in Composer
NOT PART OF THE BUILD
This commit is contained in:
glazman%netscape.com
Родитель
2ec5b81976
Коммит
6613152f00
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@ -0,0 +1,390 @@
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/* -*- 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: NPL 1.1/GPL 2.0/LGPL 2.1
|
||||
*
|
||||
* 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.
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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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*
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||||
* Alternatively, the contents of this file may be used under the terms of
|
||||
* either 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 NPL, 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 NPL, 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 "nsEditor.h"
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#include "nsIDOMCSSStyleDeclaration.h"
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#include "nsIDOMElementCSSInlineStyle.h"
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#include "nsIContent.h"
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#include "nsIEditProperty.h"
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#include "nsIParser.h"
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#include "nsReadableUtils.h"
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void
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ChangeCSSInlineStyleTxn::AppendDeclaration(nsAWritableString & aOutputString,
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nsAReadableString & aProperty,
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nsAReadableString & aValues)
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{
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aOutputString.Append(aProperty
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+ NS_LITERAL_STRING(": ")
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+ aValues
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+ NS_LITERAL_STRING("; "));
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}
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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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PRBool
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ChangeCSSInlineStyleTxn::ValueIncludes(const nsAReadableString &aValueList, const nsAReadableString &aValue, PRBool aCaseSensitive)
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{
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nsAutoString valueList(aValueList);
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PRBool result = PR_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 = (PRUnichar*)(const PRUnichar*)valueList.get();
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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) && (PR_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 = PR_TRUE;
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break;
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}
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}
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else {
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if (!nsCRT::strcasecmp(value, start)) {
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result = PR_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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nsCRT::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(nsAWritableString & aValues, const nsAReadableString & 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 = (PRUnichar*)(const PRUnichar*)classStr.get();
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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) && (PR_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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ChangeCSSInlineStyleTxn::~ChangeCSSInlineStyleTxn()
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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 nsAReadableString& aValue,
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PRBool 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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mPropertyWasSet = PR_FALSE;
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mUndoValue.SetLength(0);
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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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nsresult result=NS_OK;
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nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
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PRUint32 length;
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result = GetInlineStyles(mElement, getter_AddRefs(cssDecl), &length);
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if (NS_FAILED(result)) return result;
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nsAutoString newDeclString, propertyNameString, undoString, redoString;
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mProperty->ToString(propertyNameString);
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mPropertyWasSet = PR_FALSE;
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// does this property accept more than 1 value ?
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PRBool multiple = AcceptsMoreThanOneValue(mProperty);
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nsAutoString styleAttr(NS_LITERAL_STRING("style"));
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result = mEditor->GetAttributeValue(mElement, styleAttr, mUndoValue, &mUndoAttributeWasSet);
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if (NS_FAILED(result)) return result;
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if (0 == length && !mRemoveProperty && mUndoAttributeWasSet) {
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// dirty case, the style engine did not have the time to parse the style attribute
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newDeclString.Append(mUndoValue + NS_LITERAL_STRING(" "));
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AppendDeclaration(newDeclString, propertyNameString, mValue);
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result = mElement->SetAttribute(styleAttr, newDeclString);
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}
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else if (0 == length) {
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if (mRemoveProperty) {
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// there is no style attribute or it is empty and we want to remove something
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// so it is an early way out
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result = mElement->RemoveAttribute(styleAttr);
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}
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else {
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// the style attribute is empty or absent and we want to add a property
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// let's do it...
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AppendDeclaration(newDeclString, propertyNameString, mValue);
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result = mElement->SetAttribute(styleAttr, newDeclString);
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}
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}
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else if (mRemoveProperty && (1 == length)) {
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// let's deal with a special case : we want to remove a property from the
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// style attribute and it contains only one declaration...
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// if it is the one we look for, let's remove the attribute ! Otherwise,
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// do nothing.
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nsAutoString itemPropertyNameString;
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cssDecl->Item(0, itemPropertyNameString);
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PRBool thisOne = propertyNameString.EqualsIgnoreCase(itemPropertyNameString);
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if (thisOne) {
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mPropertyWasSet = PR_TRUE;
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if (multiple) {
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// the property accepts more than one value...
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// cssDecl->GetPropertyValue(propertyNameString, mUndoValue);
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nsAutoString values;
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cssDecl->GetPropertyValue(propertyNameString, values);
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RemoveValueFromListOfValues(values, NS_LITERAL_STRING("none"));
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RemoveValueFromListOfValues(values, mValue);
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if (0 != values.Length()) {
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AppendDeclaration(newDeclString, propertyNameString, values);
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}
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result = mElement->SetAttribute(styleAttr, newDeclString);
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}
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else {
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result = mElement->RemoveAttribute(styleAttr);
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}
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}
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}
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else {
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// general case, we are going to browse all the CSS declarations in the
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// style attribute, and, if needed, remove or rewrite the one we want
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PRUint32 index;
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nsAutoString itemPropertyNameString;
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for (index = 0 ; index < length; index++) {
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cssDecl->Item(index, itemPropertyNameString);
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PRBool thisOne = propertyNameString.EqualsIgnoreCase(itemPropertyNameString);
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if (thisOne) {
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// we have found the property we are looking for...
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// if we have to remove it, do nothing or remove only the corresponding value
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// if we have to change it, do it below
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if (mRemoveProperty) {
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if (multiple) {
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nsAutoString values;
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cssDecl->GetPropertyValue(propertyNameString, values);
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RemoveValueFromListOfValues(values, NS_LITERAL_STRING("none"));
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RemoveValueFromListOfValues(values, mValue);
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if (0 != values.Length()) {
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AppendDeclaration(newDeclString, propertyNameString, values);
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}
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}
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}
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else {
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newDeclString.Append(propertyNameString + NS_LITERAL_STRING(": "));
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if (multiple) {
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nsAutoString values;
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cssDecl->GetPropertyValue(propertyNameString, values);
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AddValueToMultivalueProperty(values, mValue);
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newDeclString.Append(values);
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}
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else {
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newDeclString.Append(mValue);
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}
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newDeclString.Append(NS_LITERAL_STRING("; "));
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}
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mPropertyWasSet = PR_TRUE;
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}
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else {
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// this is not the property we are looking for, let's recreate the declaration
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nsAutoString stringValue;
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cssDecl->GetPropertyValue(itemPropertyNameString, stringValue);
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AppendDeclaration(newDeclString, itemPropertyNameString, stringValue);
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}
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}
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// if we DON'T have to remove the property, ie if we have to change or set it,
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// did we find it earlier ? If not, let's set it now...
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if (!mRemoveProperty && !mPropertyWasSet) {
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AppendDeclaration(newDeclString, propertyNameString, mValue);
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}
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result = mElement->SetAttribute(styleAttr, newDeclString);
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}
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result = mEditor->GetAttributeValue(mElement, styleAttr, mRedoValue, &mRedoAttributeWasSet);
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return result;
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}
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// to undo a transaction, just reset the style attribute to its former value...
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NS_IMETHODIMP ChangeCSSInlineStyleTxn::UndoTransaction(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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nsresult result=NS_OK;
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if (PR_TRUE == mUndoAttributeWasSet)
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result = mElement->SetAttribute(NS_LITERAL_STRING("style"), mUndoValue);
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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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// to redo a transaction, just set again the style attribute
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NS_IMETHODIMP ChangeCSSInlineStyleTxn::RedoTransaction(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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nsresult result=NS_OK;
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if (PR_TRUE == mRedoAttributeWasSet)
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result = mElement->SetAttribute(NS_LITERAL_STRING("style"), mRedoValue);
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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::Merge(nsITransaction *aTransaction, PRBool *aDidMerge)
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{
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if (nsnull!=aDidMerge)
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*aDidMerge=PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP ChangeCSSInlineStyleTxn::GetTxnDescription(nsAWritableString& aString)
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{
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aString.Assign(NS_LITERAL_STRING("ChangeCSSInlineStyleTxn: "));
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if (PR_FALSE==mRemoveProperty)
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aString += NS_LITERAL_STRING("[mRemoveProperty == false] ");
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else
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aString += NS_LITERAL_STRING("[mRemoveProperty == 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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nsresult
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ChangeCSSInlineStyleTxn::GetInlineStyles(nsIDOMElement *aElement,
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nsIDOMCSSStyleDeclaration **aCssDecl,
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PRUint32 *aLength)
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{
|
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if (!aElement || !aLength) return NS_ERROR_NULL_POINTER;
|
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*aLength = 0;
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nsCOMPtr<nsIDOMElementCSSInlineStyle> inlineStyles = do_QueryInterface(aElement);
|
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if (!inlineStyles) return NS_ERROR_NULL_POINTER;
|
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nsresult res = inlineStyles->GetStyle(aCssDecl);
|
||||
if (NS_FAILED(res) || !aCssDecl) return NS_ERROR_NULL_POINTER;
|
||||
(*aCssDecl)->GetLength(aLength);
|
||||
return NS_OK;
|
||||
}
|
||||
|
||||
// answers true if the CSS property accepts more than one value
|
||||
PRBool
|
||||
ChangeCSSInlineStyleTxn::AcceptsMoreThanOneValue(nsIAtom *aCSSProperty)
|
||||
{
|
||||
PRBool res = PR_FALSE;
|
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nsIAtom * textDecorationAtom = NS_NewAtom("text-decoration");
|
||||
if (textDecorationAtom == aCSSProperty) {
|
||||
res = PR_TRUE;
|
||||
}
|
||||
NS_IF_RELEASE(textDecorationAtom);
|
||||
return res;
|
||||
}
|
||||
|
||||
// adds the value aNewValue to the list of white-space separated values aValues
|
||||
NS_IMETHODIMP
|
||||
ChangeCSSInlineStyleTxn::AddValueToMultivalueProperty(nsAWritableString & aValues, const nsAReadableString & aNewValue)
|
||||
{
|
||||
if (!aValues.Length()
|
||||
|| !Compare(aValues, NS_LITERAL_STRING("none"), nsCaseInsensitiveStringComparator())) {
|
||||
// the list of values is empty of the value is 'none'
|
||||
aValues.Assign(aNewValue);
|
||||
}
|
||||
else if (!ValueIncludes(aValues, aNewValue, PR_FALSE)) {
|
||||
// we already have another value but not this one; add it
|
||||
aValues.Append(PRUnichar(' '));
|
||||
aValues.Append(aNewValue);
|
||||
}
|
||||
return NS_OK;
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,171 @@
|
|||
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
||||
/* ***** BEGIN LICENSE BLOCK *****
|
||||
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
||||
*
|
||||
* 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 the Initial Developer are Copyright (C) 1998
|
||||
* the Initial Developer. All Rights Reserved.
|
||||
*
|
||||
* Contributor(s):
|
||||
* Original Author: Daniel Glazman <glazman@netscape.com>
|
||||
*
|
||||
*
|
||||
* Alternatively, the contents of this file may be used under the terms of
|
||||
* either 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 NPL, 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 NPL, the GPL or the LGPL.
|
||||
*
|
||||
* ***** END LICENSE BLOCK ***** */
|
||||
|
||||
#ifndef ChangeCSSInlineStyleTxn_h__
|
||||
#define ChangeCSSInlineStyleTxn_h__
|
||||
|
||||
#include "EditTxn.h"
|
||||
#include "nsCOMPtr.h"
|
||||
#include "nsIDOMElement.h"
|
||||
#include "nsIEditor.h"
|
||||
|
||||
#define CHANGE_CSSINLINESTYLE_TXN_CID \
|
||||
{/* a2185c9e-1dd1-11b2-88d6-d89704bf7a5a */ \
|
||||
0xa2185c9e, 0x1dd1, 0x11b2, \
|
||||
{0x88, 0xd6, 0xd8, 0x97, 0x04, 0xbf, 0x7a, 0x5a} }
|
||||
|
||||
/**
|
||||
* A transaction that changes the value of a CSS inline style of a content node.
|
||||
* This transaction covers add, remove, and change a property's value.
|
||||
*/
|
||||
class ChangeCSSInlineStyleTxn : public EditTxn
|
||||
{
|
||||
public:
|
||||
|
||||
static const nsIID& GetCID() { static nsIID iid = CHANGE_CSSINLINESTYLE_TXN_CID; return iid; }
|
||||
|
||||
virtual ~ChangeCSSInlineStyleTxn();
|
||||
|
||||
/** Initialize the transaction.
|
||||
* @param aEditor [IN] the object providing core editing operations
|
||||
* @param aNode [IN] the node whose style attribute will be changed
|
||||
* @param aProperty [IN] the name of the property to change
|
||||
* @param aValue [IN] the new value for aProperty, if aRemoveProperty is false
|
||||
* @param aRemoveProperty [IN] if PR_TRUE, remove aProperty from style attribute
|
||||
*/
|
||||
NS_IMETHOD Init(nsIEditor * aEditor,
|
||||
nsIDOMElement * aElement,
|
||||
nsIAtom * aProperty,
|
||||
const nsAReadableString & aValue,
|
||||
PRBool aRemoveProperty);
|
||||
|
||||
/** get the specified inline styles (style attribute) for an element
|
||||
*
|
||||
* @param aElement [IN] the element node
|
||||
* @param aCssDecl [OUT] the CSS declaration corresponding to the style attr
|
||||
* @param aLength [OUT] the number of declarations in aCssDecl
|
||||
*/
|
||||
static nsresult GetInlineStyles(nsIDOMElement * aElement, nsIDOMCSSStyleDeclaration ** aCssDecl,
|
||||
PRUint32 * aLength);
|
||||
|
||||
/** returns true if the list of white-space separated values contains aValue
|
||||
*
|
||||
* @return true if the value is in the list of values
|
||||
* @param aValueList [IN] a list of white-space separated values
|
||||
* @param aValue [IN] the value to look for in the list
|
||||
* @param aCaseSensitive [IN] a boolean being true if a case-sensitive search is needed
|
||||
*/
|
||||
static PRBool ValueIncludes(const nsAReadableString & aValueList, const nsAReadableString & aValue, PRBool aCaseSensitive);
|
||||
|
||||
/** adds the value aNewValue to the list of white-space separated values aValues
|
||||
*
|
||||
* @param aValues [IN/OUT] a list of wite-space separated values
|
||||
* @param aNewValue [IN] a value this code adds to aValues if it is not already in
|
||||
*/
|
||||
NS_IMETHOD AddValueToMultivalueProperty(nsAWritableString & aValues, const nsAReadableString & aNewValue);
|
||||
|
||||
private:
|
||||
ChangeCSSInlineStyleTxn();
|
||||
|
||||
/** returns true if the property accepts more than one value
|
||||
*
|
||||
* @return true if the property accepts more than one value
|
||||
* @param aCSSProperty [IN] the CSS property
|
||||
*/
|
||||
PRBool AcceptsMoreThanOneValue(nsIAtom * aCSSProperty);
|
||||
|
||||
/** remove a value from a list of white-space separated values
|
||||
* @param aValueList [IN] a list of white-space separated values
|
||||
* @param aValue [IN] the value to remove from the list
|
||||
*/
|
||||
void RemoveValueFromListOfValues(nsAWritableString & aValues, const nsAReadableString & aRemoveValue);
|
||||
|
||||
/** appends 'property : value' to the string
|
||||
*
|
||||
* @param aOutputString [IN/OUT] the string
|
||||
* @param aPropert [IN] the css property string
|
||||
* @param aValues [IN] the value string for the css property
|
||||
*/
|
||||
void AppendDeclaration(nsAWritableString & aOutputString,
|
||||
nsAReadableString & aProperty,
|
||||
nsAReadableString & aValues);
|
||||
|
||||
public:
|
||||
|
||||
NS_IMETHOD DoTransaction(void);
|
||||
|
||||
NS_IMETHOD UndoTransaction(void);
|
||||
|
||||
NS_IMETHOD RedoTransaction(void);
|
||||
|
||||
NS_IMETHOD Merge(nsITransaction *aTransaction, PRBool *aDidMerge);
|
||||
|
||||
NS_IMETHOD GetTxnDescription(nsAWritableString& aTxnDescription);
|
||||
|
||||
protected:
|
||||
|
||||
/** the editor that created this transaction */
|
||||
nsIEditor *mEditor;
|
||||
|
||||
/** the element to operate upon */
|
||||
nsCOMPtr<nsIDOMElement> mElement;
|
||||
|
||||
/** the CSS property to change */
|
||||
nsIAtom *mProperty;
|
||||
|
||||
/** the value to set the property to (ignored if mRemoveProperty==PR_TRUE) */
|
||||
nsString mValue;
|
||||
|
||||
/** the value to set the attribute to for undo */
|
||||
nsString mUndoValue;
|
||||
PRBool mUndoAttributeWasSet;
|
||||
/** the value to set the attribute to for redo */
|
||||
nsString mRedoValue;
|
||||
PRBool mRedoAttributeWasSet;
|
||||
|
||||
/** PR_TRUE if the mProperty was explicitely set on mElement at the time of execution */
|
||||
PRBool mPropertyWasSet;
|
||||
|
||||
/** PR_TRUE if the operation is to remove mProperty from mElement */
|
||||
PRBool mRemoveProperty;
|
||||
|
||||
friend class TransactionFactory;
|
||||
};
|
||||
|
||||
#endif
|
||||
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