mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
299 lines
9.1 KiB
C++
299 lines
9.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "ChangeStyleTxn.h"
|
|
|
|
#include "mozilla/dom/Element.h" // for Element
|
|
#include "nsAString.h" // for nsAString_internal::Append, etc
|
|
#include "nsCRT.h" // for nsCRT::IsAsciiSpace
|
|
#include "nsDebug.h" // for NS_ENSURE_SUCCESS, etc
|
|
#include "nsError.h" // for NS_ERROR_NULL_POINTER, etc
|
|
#include "nsGkAtoms.h" // for nsGkAtoms, etc
|
|
#include "nsIDOMCSSStyleDeclaration.h" // for nsIDOMCSSStyleDeclaration
|
|
#include "nsIDOMElementCSSInlineStyle.h" // for nsIDOMElementCSSInlineStyle
|
|
#include "nsLiteralString.h" // for NS_LITERAL_STRING, etc
|
|
#include "nsReadableUtils.h" // for ToNewUnicode
|
|
#include "nsString.h" // for nsAutoString, nsString, etc
|
|
#include "nsUnicharUtils.h" // for nsCaseInsensitiveStringComparator
|
|
|
|
using namespace mozilla;
|
|
using namespace mozilla::dom;
|
|
|
|
#define kNullCh (char16_t('\0'))
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_INHERITED(ChangeStyleTxn, EditTxn, mElement)
|
|
|
|
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ChangeStyleTxn)
|
|
NS_INTERFACE_MAP_END_INHERITING(EditTxn)
|
|
|
|
NS_IMPL_ADDREF_INHERITED(ChangeStyleTxn, EditTxn)
|
|
NS_IMPL_RELEASE_INHERITED(ChangeStyleTxn, EditTxn)
|
|
|
|
ChangeStyleTxn::~ChangeStyleTxn()
|
|
{
|
|
}
|
|
|
|
// Answers true if aValue is in the string list of white-space separated values
|
|
// aValueList.
|
|
bool
|
|
ChangeStyleTxn::ValueIncludes(const nsAString &aValueList,
|
|
const nsAString &aValue)
|
|
{
|
|
nsAutoString valueList(aValueList);
|
|
bool result = false;
|
|
|
|
// put an extra null at the end
|
|
valueList.Append(kNullCh);
|
|
|
|
char16_t* value = ToNewUnicode(aValue);
|
|
char16_t* start = valueList.BeginWriting();
|
|
char16_t* end = start;
|
|
|
|
while (kNullCh != *start) {
|
|
while (kNullCh != *start && nsCRT::IsAsciiSpace(*start)) {
|
|
// skip leading space
|
|
start++;
|
|
}
|
|
end = start;
|
|
|
|
while (kNullCh != *end && !nsCRT::IsAsciiSpace(*end)) {
|
|
// look for space or end
|
|
end++;
|
|
}
|
|
// end string here
|
|
*end = kNullCh;
|
|
|
|
if (start < end) {
|
|
if (nsDependentString(value).Equals(nsDependentString(start),
|
|
nsCaseInsensitiveStringComparator())) {
|
|
result = true;
|
|
break;
|
|
}
|
|
}
|
|
start = ++end;
|
|
}
|
|
free(value);
|
|
return result;
|
|
}
|
|
|
|
// Removes the value aRemoveValue from the string list of white-space separated
|
|
// values aValueList
|
|
void
|
|
ChangeStyleTxn::RemoveValueFromListOfValues(nsAString& aValues,
|
|
const nsAString& aRemoveValue)
|
|
{
|
|
nsAutoString classStr(aValues);
|
|
nsAutoString outString;
|
|
// put an extra null at the end
|
|
classStr.Append(kNullCh);
|
|
|
|
char16_t* start = classStr.BeginWriting();
|
|
char16_t* end = start;
|
|
|
|
while (kNullCh != *start) {
|
|
while (kNullCh != *start && nsCRT::IsAsciiSpace(*start)) {
|
|
// skip leading space
|
|
start++;
|
|
}
|
|
end = start;
|
|
|
|
while (kNullCh != *end && !nsCRT::IsAsciiSpace(*end)) {
|
|
// look for space or end
|
|
end++;
|
|
}
|
|
// end string here
|
|
*end = kNullCh;
|
|
|
|
if (start < end && !aRemoveValue.Equals(start)) {
|
|
outString.Append(start);
|
|
outString.Append(char16_t(' '));
|
|
}
|
|
|
|
start = ++end;
|
|
}
|
|
aValues.Assign(outString);
|
|
}
|
|
|
|
ChangeStyleTxn::ChangeStyleTxn(Element& aElement, nsIAtom& aProperty,
|
|
const nsAString& aValue,
|
|
EChangeType aChangeType)
|
|
: EditTxn()
|
|
, mElement(&aElement)
|
|
, mProperty(&aProperty)
|
|
, mValue(aValue)
|
|
, mRemoveProperty(aChangeType == eRemove)
|
|
, mUndoValue()
|
|
, mRedoValue()
|
|
, mUndoAttributeWasSet(false)
|
|
, mRedoAttributeWasSet(false)
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
ChangeStyleTxn::DoTransaction()
|
|
{
|
|
nsCOMPtr<nsIDOMElementCSSInlineStyle> inlineStyles =
|
|
do_QueryInterface(mElement);
|
|
NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
|
|
|
|
nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
|
|
nsresult result = inlineStyles->GetStyle(getter_AddRefs(cssDecl));
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
NS_ENSURE_TRUE(cssDecl, NS_ERROR_NULL_POINTER);
|
|
|
|
nsAutoString propertyNameString;
|
|
mProperty->ToString(propertyNameString);
|
|
|
|
mUndoAttributeWasSet = mElement->HasAttr(kNameSpaceID_None,
|
|
nsGkAtoms::style);
|
|
|
|
nsAutoString values;
|
|
result = cssDecl->GetPropertyValue(propertyNameString, values);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
mUndoValue.Assign(values);
|
|
|
|
// Does this property accept more than one value? (bug 62682)
|
|
bool multiple = AcceptsMoreThanOneValue(*mProperty);
|
|
|
|
if (mRemoveProperty) {
|
|
nsAutoString returnString;
|
|
if (multiple) {
|
|
// Let's remove only the value we have to remove and not the others
|
|
|
|
// The two lines below are a workaround because
|
|
// nsDOMCSSDeclaration::GetPropertyCSSValue is not yet implemented (bug
|
|
// 62682)
|
|
RemoveValueFromListOfValues(values, NS_LITERAL_STRING("none"));
|
|
RemoveValueFromListOfValues(values, mValue);
|
|
if (values.IsEmpty()) {
|
|
result = cssDecl->RemoveProperty(propertyNameString, returnString);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
} else {
|
|
nsAutoString priority;
|
|
result = cssDecl->GetPropertyPriority(propertyNameString, priority);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
result = cssDecl->SetProperty(propertyNameString, values,
|
|
priority);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
}
|
|
} else {
|
|
result = cssDecl->RemoveProperty(propertyNameString, returnString);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
}
|
|
} else {
|
|
nsAutoString priority;
|
|
result = cssDecl->GetPropertyPriority(propertyNameString, priority);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
if (multiple) {
|
|
// Let's add the value we have to add to the others
|
|
|
|
// The line below is a workaround because
|
|
// nsDOMCSSDeclaration::GetPropertyCSSValue is not yet implemented (bug
|
|
// 62682)
|
|
AddValueToMultivalueProperty(values, mValue);
|
|
} else {
|
|
values.Assign(mValue);
|
|
}
|
|
result = cssDecl->SetProperty(propertyNameString, values,
|
|
priority);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
}
|
|
|
|
// Let's be sure we don't keep an empty style attribute
|
|
uint32_t length;
|
|
result = cssDecl->GetLength(&length);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
if (!length) {
|
|
result = mElement->UnsetAttr(kNameSpaceID_None, nsGkAtoms::style, true);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
} else {
|
|
mRedoAttributeWasSet = true;
|
|
}
|
|
|
|
return cssDecl->GetPropertyValue(propertyNameString, mRedoValue);
|
|
}
|
|
|
|
nsresult
|
|
ChangeStyleTxn::SetStyle(bool aAttributeWasSet, nsAString& aValue)
|
|
{
|
|
nsresult result = NS_OK;
|
|
if (aAttributeWasSet) {
|
|
// The style attribute was not empty, let's recreate the declaration
|
|
nsAutoString propertyNameString;
|
|
mProperty->ToString(propertyNameString);
|
|
|
|
nsCOMPtr<nsIDOMElementCSSInlineStyle> inlineStyles =
|
|
do_QueryInterface(mElement);
|
|
NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
|
|
nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
|
|
result = inlineStyles->GetStyle(getter_AddRefs(cssDecl));
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
NS_ENSURE_TRUE(cssDecl, NS_ERROR_NULL_POINTER);
|
|
|
|
if (aValue.IsEmpty()) {
|
|
// An empty value means we have to remove the property
|
|
nsAutoString returnString;
|
|
result = cssDecl->RemoveProperty(propertyNameString, returnString);
|
|
} else {
|
|
// Let's recreate the declaration as it was
|
|
nsAutoString priority;
|
|
result = cssDecl->GetPropertyPriority(propertyNameString, priority);
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
result = cssDecl->SetProperty(propertyNameString, aValue, priority);
|
|
}
|
|
} else {
|
|
result = mElement->UnsetAttr(kNameSpaceID_None, nsGkAtoms::style, true);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
ChangeStyleTxn::UndoTransaction()
|
|
{
|
|
return SetStyle(mUndoAttributeWasSet, mUndoValue);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
ChangeStyleTxn::RedoTransaction()
|
|
{
|
|
return SetStyle(mRedoAttributeWasSet, mRedoValue);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
ChangeStyleTxn::GetTxnDescription(nsAString& aString)
|
|
{
|
|
aString.AssignLiteral("ChangeStyleTxn: [mRemoveProperty == ");
|
|
|
|
if (mRemoveProperty) {
|
|
aString.AppendLiteral("true] ");
|
|
} else {
|
|
aString.AppendLiteral("false] ");
|
|
}
|
|
aString += nsDependentAtomString(mProperty);
|
|
return NS_OK;
|
|
}
|
|
|
|
// True if the CSS property accepts more than one value
|
|
bool
|
|
ChangeStyleTxn::AcceptsMoreThanOneValue(nsIAtom& aCSSProperty)
|
|
{
|
|
return &aCSSProperty == nsGkAtoms::text_decoration;
|
|
}
|
|
|
|
// Adds the value aNewValue to the list of white-space separated values aValues
|
|
void
|
|
ChangeStyleTxn::AddValueToMultivalueProperty(nsAString& aValues,
|
|
const nsAString& aNewValue)
|
|
{
|
|
if (aValues.IsEmpty() || aValues.LowerCaseEqualsLiteral("none")) {
|
|
aValues.Assign(aNewValue);
|
|
} else if (!ValueIncludes(aValues, aNewValue)) {
|
|
// We already have another value but not this one; add it
|
|
aValues.Append(char16_t(' '));
|
|
aValues.Append(aNewValue);
|
|
}
|
|
}
|