forked from mirrors/gecko-dev
4cc6758558
We have more readable and faster versions (that just omit the namespace arg). Mostly done via sed, with a couple helpers to use the faster lookups where possible. Differential Revision: https://phabricator.services.mozilla.com/D181795
729 lines
24 KiB
C++
729 lines
24 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* nsIContentSerializer implementation that can be used with an
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* nsIDocumentEncoder to convert an XHTML (not HTML!) DOM to an XHTML
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* string that could be parsed into more or less the original DOM.
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*/
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#include "nsXHTMLContentSerializer.h"
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#include "mozilla/dom/Element.h"
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#include "nsIContent.h"
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#include "mozilla/dom/Document.h"
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#include "nsElementTable.h"
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#include "nsNameSpaceManager.h"
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#include "nsString.h"
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#include "nsUnicharUtils.h"
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#include "nsIDocumentEncoder.h"
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#include "nsGkAtoms.h"
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#include "nsIURI.h"
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#include "nsNetUtil.h"
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#include "nsEscape.h"
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#include "nsCRT.h"
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#include "nsContentUtils.h"
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#include "nsIScriptElement.h"
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#include "nsStubMutationObserver.h"
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#include "nsAttrName.h"
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#include "nsComputedDOMStyle.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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static const int32_t kLongLineLen = 128;
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#define kXMLNS "xmlns"
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nsresult NS_NewXHTMLContentSerializer(nsIContentSerializer** aSerializer) {
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RefPtr<nsXHTMLContentSerializer> it = new nsXHTMLContentSerializer();
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it.forget(aSerializer);
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return NS_OK;
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}
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nsXHTMLContentSerializer::nsXHTMLContentSerializer()
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: mIsHTMLSerializer(false),
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mIsCopying(false),
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mDisableEntityEncoding(0),
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mRewriteEncodingDeclaration(false),
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mIsFirstChildOfOL(false) {}
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nsXHTMLContentSerializer::~nsXHTMLContentSerializer() {
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NS_ASSERTION(mOLStateStack.IsEmpty(), "Expected OL State stack to be empty");
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}
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NS_IMETHODIMP
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nsXHTMLContentSerializer::Init(uint32_t aFlags, uint32_t aWrapColumn,
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const Encoding* aEncoding, bool aIsCopying,
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bool aRewriteEncodingDeclaration,
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bool* aNeedsPreformatScanning,
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nsAString& aOutput) {
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// The previous version of the HTML serializer did implicit wrapping
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// when there is no flags, so we keep wrapping in order to keep
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// compatibility with the existing calling code
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// XXXLJ perhaps should we remove this default settings later ?
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if (aFlags & nsIDocumentEncoder::OutputFormatted) {
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aFlags = aFlags | nsIDocumentEncoder::OutputWrap;
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}
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nsresult rv;
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rv = nsXMLContentSerializer::Init(aFlags, aWrapColumn, aEncoding, aIsCopying,
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aRewriteEncodingDeclaration,
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aNeedsPreformatScanning, aOutput);
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NS_ENSURE_SUCCESS(rv, rv);
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mRewriteEncodingDeclaration = aRewriteEncodingDeclaration;
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mIsCopying = aIsCopying;
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mIsFirstChildOfOL = false;
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mInBody = 0;
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mDisableEntityEncoding = 0;
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mBodyOnly = (mFlags & nsIDocumentEncoder::OutputBodyOnly);
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return NS_OK;
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}
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// See if the string has any lines longer than longLineLen:
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// if so, we presume formatting is wonky (e.g. the node has been edited)
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// and we'd better rewrap the whole text node.
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bool nsXHTMLContentSerializer::HasLongLines(const nsString& text,
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int32_t& aLastNewlineOffset) {
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uint32_t start = 0;
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uint32_t theLen = text.Length();
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bool rv = false;
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aLastNewlineOffset = kNotFound;
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for (start = 0; start < theLen;) {
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int32_t eol = text.FindChar('\n', start);
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if (eol < 0) {
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eol = text.Length();
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} else {
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aLastNewlineOffset = eol;
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}
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if (int32_t(eol - start) > kLongLineLen) rv = true;
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start = eol + 1;
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}
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return rv;
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}
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NS_IMETHODIMP
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nsXHTMLContentSerializer::AppendText(nsIContent* aText, int32_t aStartOffset,
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int32_t aEndOffset) {
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NS_ENSURE_ARG(aText);
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NS_ENSURE_STATE(mOutput);
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nsAutoString data;
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nsresult rv;
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rv = AppendTextData(aText, aStartOffset, aEndOffset, data, true);
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if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
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if (mDoRaw || PreLevel() > 0) {
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NS_ENSURE_TRUE(AppendToStringConvertLF(data, *mOutput),
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NS_ERROR_OUT_OF_MEMORY);
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} else if (mDoFormat) {
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NS_ENSURE_TRUE(AppendToStringFormatedWrapped(data, *mOutput),
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NS_ERROR_OUT_OF_MEMORY);
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} else if (mDoWrap) {
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NS_ENSURE_TRUE(AppendToStringWrapped(data, *mOutput),
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NS_ERROR_OUT_OF_MEMORY);
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} else {
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int32_t lastNewlineOffset = kNotFound;
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if (HasLongLines(data, lastNewlineOffset)) {
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// We have long lines, rewrap
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mDoWrap = true;
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bool result = AppendToStringWrapped(data, *mOutput);
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mDoWrap = false;
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NS_ENSURE_TRUE(result, NS_ERROR_OUT_OF_MEMORY);
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} else {
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NS_ENSURE_TRUE(AppendToStringConvertLF(data, *mOutput),
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NS_ERROR_OUT_OF_MEMORY);
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}
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}
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return NS_OK;
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}
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bool nsXHTMLContentSerializer::SerializeAttributes(
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Element* aElement, Element* aOriginalElement, nsAString& aTagPrefix,
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const nsAString& aTagNamespaceURI, nsAtom* aTagName, nsAString& aStr,
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uint32_t aSkipAttr, bool aAddNSAttr) {
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nsresult rv;
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uint32_t index, count;
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nsAutoString prefixStr, uriStr, valueStr;
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nsAutoString xmlnsStr;
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xmlnsStr.AssignLiteral(kXMLNS);
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int32_t contentNamespaceID = aElement->GetNameSpaceID();
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MaybeSerializeIsValue(aElement, aStr);
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// this method is not called by nsHTMLContentSerializer
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// so we don't have to check HTML element, just XHTML
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if (mIsCopying && kNameSpaceID_XHTML == contentNamespaceID) {
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// Need to keep track of OL and LI elements in order to get ordinal number
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// for the LI.
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if (aTagName == nsGkAtoms::ol) {
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// We are copying and current node is an OL;
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// Store its start attribute value in olState->startVal.
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nsAutoString start;
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int32_t startAttrVal = 0;
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aElement->GetAttr(nsGkAtoms::start, start);
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if (!start.IsEmpty()) {
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nsresult rv = NS_OK;
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startAttrVal = start.ToInteger(&rv);
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// If OL has "start" attribute, first LI element has to start with that
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// value Therefore subtracting 1 as all the LI elements are incrementing
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// it before using it; In failure of ToInteger(), default StartAttrValue
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// to 0.
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if (NS_SUCCEEDED(rv))
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--startAttrVal;
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else
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startAttrVal = 0;
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}
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olState state(startAttrVal, true);
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mOLStateStack.AppendElement(state);
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} else if (aTagName == nsGkAtoms::li) {
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mIsFirstChildOfOL = IsFirstChildOfOL(aOriginalElement);
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if (mIsFirstChildOfOL) {
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// If OL is parent of this LI, serialize attributes in different manner.
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NS_ENSURE_TRUE(SerializeLIValueAttribute(aElement, aStr), false);
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}
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}
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}
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// If we had to add a new namespace declaration, serialize
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// and push it on the namespace stack
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if (aAddNSAttr) {
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if (aTagPrefix.IsEmpty()) {
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// Serialize default namespace decl
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NS_ENSURE_TRUE(
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SerializeAttr(u""_ns, xmlnsStr, aTagNamespaceURI, aStr, true), false);
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} else {
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// Serialize namespace decl
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NS_ENSURE_TRUE(
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SerializeAttr(xmlnsStr, aTagPrefix, aTagNamespaceURI, aStr, true),
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false);
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}
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PushNameSpaceDecl(aTagPrefix, aTagNamespaceURI, aOriginalElement);
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}
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count = aElement->GetAttrCount();
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// Now serialize each of the attributes
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// XXX Unfortunately we need a namespace manager to get
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// attribute URIs.
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for (index = 0; index < count; index++) {
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if (aSkipAttr == index) {
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continue;
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}
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dom::BorrowedAttrInfo info = aElement->GetAttrInfoAt(index);
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const nsAttrName* name = info.mName;
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int32_t namespaceID = name->NamespaceID();
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nsAtom* attrName = name->LocalName();
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nsAtom* attrPrefix = name->GetPrefix();
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// Filter out any attribute starting with [-|_]moz
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nsDependentAtomString attrNameStr(attrName);
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if (StringBeginsWith(attrNameStr, u"_moz"_ns) ||
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StringBeginsWith(attrNameStr, u"-moz"_ns)) {
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continue;
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}
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if (attrPrefix) {
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attrPrefix->ToString(prefixStr);
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} else {
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prefixStr.Truncate();
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}
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bool addNSAttr = false;
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if (kNameSpaceID_XMLNS != namespaceID) {
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nsNameSpaceManager::GetInstance()->GetNameSpaceURI(namespaceID, uriStr);
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addNSAttr = ConfirmPrefix(prefixStr, uriStr, aOriginalElement, true);
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}
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info.mValue->ToString(valueStr);
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nsDependentAtomString nameStr(attrName);
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bool isJS = false;
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if (kNameSpaceID_XHTML == contentNamespaceID) {
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if (mIsCopying && mIsFirstChildOfOL && (aTagName == nsGkAtoms::li) &&
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(attrName == nsGkAtoms::value)) {
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// This is handled separately in SerializeLIValueAttribute()
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continue;
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}
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isJS = IsJavaScript(aElement, attrName, namespaceID, valueStr);
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if (namespaceID == kNameSpaceID_None &&
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((attrName == nsGkAtoms::href) || (attrName == nsGkAtoms::src))) {
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// Make all links absolute when converting only the selection:
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if (mFlags & nsIDocumentEncoder::OutputAbsoluteLinks) {
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// Would be nice to handle OBJECT tags,
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// but that gets more complicated since we have to
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// search the tag list for CODEBASE as well.
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// For now, just leave them relative.
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nsIURI* uri = aElement->GetBaseURI();
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if (uri) {
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nsAutoString absURI;
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rv = NS_MakeAbsoluteURI(absURI, valueStr, uri);
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if (NS_SUCCEEDED(rv)) {
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valueStr = absURI;
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}
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}
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}
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}
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if (mRewriteEncodingDeclaration && aTagName == nsGkAtoms::meta &&
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attrName == nsGkAtoms::content) {
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// If we're serializing a <meta http-equiv="content-type">,
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// use the proper value, rather than what's in the document.
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nsAutoString header;
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aElement->GetAttr(nsGkAtoms::httpEquiv, header);
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if (header.LowerCaseEqualsLiteral("content-type")) {
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valueStr =
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u"text/html; charset="_ns + NS_ConvertASCIItoUTF16(mCharset);
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}
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}
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// Expand shorthand attribute.
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if (namespaceID == kNameSpaceID_None &&
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IsShorthandAttr(attrName, aTagName) && valueStr.IsEmpty()) {
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valueStr = nameStr;
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}
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} else {
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isJS = IsJavaScript(aElement, attrName, namespaceID, valueStr);
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}
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NS_ENSURE_TRUE(SerializeAttr(prefixStr, nameStr, valueStr, aStr, !isJS),
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false);
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if (addNSAttr) {
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NS_ASSERTION(!prefixStr.IsEmpty(),
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"Namespaced attributes must have a prefix");
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NS_ENSURE_TRUE(SerializeAttr(xmlnsStr, prefixStr, uriStr, aStr, true),
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false);
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PushNameSpaceDecl(prefixStr, uriStr, aOriginalElement);
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}
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}
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return true;
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}
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bool nsXHTMLContentSerializer::AfterElementStart(nsIContent* aContent,
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nsIContent* aOriginalElement,
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nsAString& aStr) {
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if (mRewriteEncodingDeclaration && aContent->IsHTMLElement(nsGkAtoms::head)) {
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// Check if there already are any content-type meta children.
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// If there are, they will be modified to use the correct charset.
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// If there aren't, we'll insert one here.
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bool hasMeta = false;
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for (nsIContent* child = aContent->GetFirstChild(); child;
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child = child->GetNextSibling()) {
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if (child->IsHTMLElement(nsGkAtoms::meta) &&
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child->AsElement()->HasAttr(nsGkAtoms::content)) {
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nsAutoString header;
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child->AsElement()->GetAttr(nsGkAtoms::httpEquiv, header);
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if (header.LowerCaseEqualsLiteral("content-type")) {
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hasMeta = true;
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break;
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}
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}
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}
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if (!hasMeta) {
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NS_ENSURE_TRUE(AppendNewLineToString(aStr), false);
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if (mDoFormat) {
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NS_ENSURE_TRUE(AppendIndentation(aStr), false);
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}
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NS_ENSURE_TRUE(
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AppendToString(u"<meta http-equiv=\"content-type\""_ns, aStr), false);
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NS_ENSURE_TRUE(AppendToString(u" content=\"text/html; charset="_ns, aStr),
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false);
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NS_ENSURE_TRUE(AppendToString(NS_ConvertASCIItoUTF16(mCharset), aStr),
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false);
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if (mIsHTMLSerializer) {
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NS_ENSURE_TRUE(AppendToString(u"\">"_ns, aStr), false);
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} else {
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NS_ENSURE_TRUE(AppendToString(u"\" />"_ns, aStr), false);
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}
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}
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}
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return true;
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}
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void nsXHTMLContentSerializer::AfterElementEnd(nsIContent* aContent,
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nsAString& aStr) {
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NS_ASSERTION(!mIsHTMLSerializer,
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"nsHTMLContentSerializer shouldn't call this method !");
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// this method is not called by nsHTMLContentSerializer
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// so we don't have to check HTML element, just XHTML
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if (aContent->IsHTMLElement(nsGkAtoms::body)) {
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--mInBody;
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}
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}
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NS_IMETHODIMP
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nsXHTMLContentSerializer::AppendDocumentStart(Document* aDocument) {
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if (!mBodyOnly) {
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return nsXMLContentSerializer::AppendDocumentStart(aDocument);
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}
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return NS_OK;
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}
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bool nsXHTMLContentSerializer::CheckElementStart(Element* aElement,
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bool& aForceFormat,
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nsAString& aStr,
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nsresult& aResult) {
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aResult = NS_OK;
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// The _moz_dirty attribute is emitted by the editor to
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// indicate that this element should be pretty printed
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// even if we're not in pretty printing mode
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aForceFormat = !(mFlags & nsIDocumentEncoder::OutputIgnoreMozDirty) &&
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aElement->HasAttr(nsGkAtoms::mozdirty);
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if (aElement->IsHTMLElement(nsGkAtoms::br) &&
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(mFlags & nsIDocumentEncoder::OutputNoFormattingInPre) &&
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PreLevel() > 0) {
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aResult = AppendNewLineToString(aStr) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
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return false;
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}
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if (aElement->IsHTMLElement(nsGkAtoms::body)) {
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++mInBody;
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}
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return true;
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}
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bool nsXHTMLContentSerializer::CheckElementEnd(Element* aElement,
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Element* aOriginalElement,
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bool& aForceFormat,
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nsAString& aStr) {
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NS_ASSERTION(!mIsHTMLSerializer,
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"nsHTMLContentSerializer shouldn't call this method !");
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aForceFormat = !(mFlags & nsIDocumentEncoder::OutputIgnoreMozDirty) &&
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aElement->HasAttr(nsGkAtoms::mozdirty);
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if (mIsCopying && aElement->IsHTMLElement(nsGkAtoms::ol)) {
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NS_ASSERTION((!mOLStateStack.IsEmpty()), "Cannot have an empty OL Stack");
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/* Though at this point we must always have an state to be deleted as all
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the OL opening tags are supposed to push an olState object to the stack*/
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if (!mOLStateStack.IsEmpty()) {
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mOLStateStack.RemoveLastElement();
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}
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}
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bool dummyFormat;
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return nsXMLContentSerializer::CheckElementEnd(aElement, aOriginalElement,
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dummyFormat, aStr);
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}
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bool nsXHTMLContentSerializer::AppendAndTranslateEntities(
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const nsAString& aStr, nsAString& aOutputStr) {
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if (mBodyOnly && !mInBody) {
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return true;
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}
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if (mDisableEntityEncoding) {
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return aOutputStr.Append(aStr, fallible);
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}
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return nsXMLContentSerializer::AppendAndTranslateEntities(aStr, aOutputStr);
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}
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bool nsXHTMLContentSerializer::IsShorthandAttr(const nsAtom* aAttrName,
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const nsAtom* aElementName) {
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// checked
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if ((aAttrName == nsGkAtoms::checked) && (aElementName == nsGkAtoms::input)) {
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return true;
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}
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// compact
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if ((aAttrName == nsGkAtoms::compact) &&
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(aElementName == nsGkAtoms::dir || aElementName == nsGkAtoms::dl ||
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aElementName == nsGkAtoms::menu || aElementName == nsGkAtoms::ol ||
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aElementName == nsGkAtoms::ul)) {
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return true;
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}
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// declare
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if ((aAttrName == nsGkAtoms::declare) &&
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(aElementName == nsGkAtoms::object)) {
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return true;
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}
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// defer
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if ((aAttrName == nsGkAtoms::defer) && (aElementName == nsGkAtoms::script)) {
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return true;
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}
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// disabled
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if ((aAttrName == nsGkAtoms::disabled) &&
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(aElementName == nsGkAtoms::button || aElementName == nsGkAtoms::input ||
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aElementName == nsGkAtoms::optgroup ||
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aElementName == nsGkAtoms::option || aElementName == nsGkAtoms::select ||
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aElementName == nsGkAtoms::textarea)) {
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return true;
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}
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// ismap
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if ((aAttrName == nsGkAtoms::ismap) &&
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(aElementName == nsGkAtoms::img || aElementName == nsGkAtoms::input)) {
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return true;
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}
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// multiple
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if ((aAttrName == nsGkAtoms::multiple) &&
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(aElementName == nsGkAtoms::select)) {
|
|
return true;
|
|
}
|
|
|
|
// noresize
|
|
if ((aAttrName == nsGkAtoms::noresize) &&
|
|
(aElementName == nsGkAtoms::frame)) {
|
|
return true;
|
|
}
|
|
|
|
// noshade
|
|
if ((aAttrName == nsGkAtoms::noshade) && (aElementName == nsGkAtoms::hr)) {
|
|
return true;
|
|
}
|
|
|
|
// nowrap
|
|
if ((aAttrName == nsGkAtoms::nowrap) &&
|
|
(aElementName == nsGkAtoms::td || aElementName == nsGkAtoms::th)) {
|
|
return true;
|
|
}
|
|
|
|
// readonly
|
|
if ((aAttrName == nsGkAtoms::readonly) &&
|
|
(aElementName == nsGkAtoms::input ||
|
|
aElementName == nsGkAtoms::textarea)) {
|
|
return true;
|
|
}
|
|
|
|
// selected
|
|
if ((aAttrName == nsGkAtoms::selected) &&
|
|
(aElementName == nsGkAtoms::option)) {
|
|
return true;
|
|
}
|
|
|
|
// autoplay and controls
|
|
if ((aElementName == nsGkAtoms::video || aElementName == nsGkAtoms::audio) &&
|
|
(aAttrName == nsGkAtoms::autoplay || aAttrName == nsGkAtoms::muted ||
|
|
aAttrName == nsGkAtoms::controls)) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool nsXHTMLContentSerializer::LineBreakBeforeOpen(int32_t aNamespaceID,
|
|
nsAtom* aName) {
|
|
if (aNamespaceID != kNameSpaceID_XHTML) {
|
|
return mAddSpace;
|
|
}
|
|
|
|
if (aName == nsGkAtoms::title || aName == nsGkAtoms::meta ||
|
|
aName == nsGkAtoms::link || aName == nsGkAtoms::style ||
|
|
aName == nsGkAtoms::select || aName == nsGkAtoms::option ||
|
|
aName == nsGkAtoms::script || aName == nsGkAtoms::html) {
|
|
return true;
|
|
}
|
|
|
|
return nsHTMLElement::IsBlock(nsHTMLTags::CaseSensitiveAtomTagToId(aName));
|
|
}
|
|
|
|
bool nsXHTMLContentSerializer::LineBreakAfterOpen(int32_t aNamespaceID,
|
|
nsAtom* aName) {
|
|
if (aNamespaceID != kNameSpaceID_XHTML) {
|
|
return false;
|
|
}
|
|
|
|
if ((aName == nsGkAtoms::html) || (aName == nsGkAtoms::head) ||
|
|
(aName == nsGkAtoms::body) || (aName == nsGkAtoms::ul) ||
|
|
(aName == nsGkAtoms::ol) || (aName == nsGkAtoms::dl) ||
|
|
(aName == nsGkAtoms::table) || (aName == nsGkAtoms::tbody) ||
|
|
(aName == nsGkAtoms::tr) || (aName == nsGkAtoms::br) ||
|
|
(aName == nsGkAtoms::meta) || (aName == nsGkAtoms::link) ||
|
|
(aName == nsGkAtoms::script) || (aName == nsGkAtoms::select) ||
|
|
(aName == nsGkAtoms::map) || (aName == nsGkAtoms::area) ||
|
|
(aName == nsGkAtoms::style)) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool nsXHTMLContentSerializer::LineBreakBeforeClose(int32_t aNamespaceID,
|
|
nsAtom* aName) {
|
|
if (aNamespaceID != kNameSpaceID_XHTML) {
|
|
return false;
|
|
}
|
|
|
|
if ((aName == nsGkAtoms::html) || (aName == nsGkAtoms::head) ||
|
|
(aName == nsGkAtoms::body) || (aName == nsGkAtoms::ul) ||
|
|
(aName == nsGkAtoms::ol) || (aName == nsGkAtoms::dl) ||
|
|
(aName == nsGkAtoms::select) || (aName == nsGkAtoms::table) ||
|
|
(aName == nsGkAtoms::tbody)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool nsXHTMLContentSerializer::LineBreakAfterClose(int32_t aNamespaceID,
|
|
nsAtom* aName) {
|
|
if (aNamespaceID != kNameSpaceID_XHTML) {
|
|
return false;
|
|
}
|
|
|
|
if ((aName == nsGkAtoms::html) || (aName == nsGkAtoms::head) ||
|
|
(aName == nsGkAtoms::body) || (aName == nsGkAtoms::tr) ||
|
|
(aName == nsGkAtoms::th) || (aName == nsGkAtoms::td) ||
|
|
(aName == nsGkAtoms::title) || (aName == nsGkAtoms::dt) ||
|
|
(aName == nsGkAtoms::dd) || (aName == nsGkAtoms::select) ||
|
|
(aName == nsGkAtoms::option) || (aName == nsGkAtoms::map)) {
|
|
return true;
|
|
}
|
|
|
|
return nsHTMLElement::IsBlock(nsHTMLTags::CaseSensitiveAtomTagToId(aName));
|
|
}
|
|
|
|
void nsXHTMLContentSerializer::MaybeEnterInPreContent(nsIContent* aNode) {
|
|
if (!ShouldMaintainPreLevel() || !aNode->IsHTMLElement()) {
|
|
return;
|
|
}
|
|
|
|
if (IsElementPreformatted(aNode) ||
|
|
aNode->IsAnyOfHTMLElements(nsGkAtoms::script, nsGkAtoms::style,
|
|
nsGkAtoms::noscript, nsGkAtoms::noframes)) {
|
|
PreLevel()++;
|
|
}
|
|
}
|
|
|
|
void nsXHTMLContentSerializer::MaybeLeaveFromPreContent(nsIContent* aNode) {
|
|
if (!ShouldMaintainPreLevel() || !aNode->IsHTMLElement()) {
|
|
return;
|
|
}
|
|
|
|
if (IsElementPreformatted(aNode) ||
|
|
aNode->IsAnyOfHTMLElements(nsGkAtoms::script, nsGkAtoms::style,
|
|
nsGkAtoms::noscript, nsGkAtoms::noframes)) {
|
|
--PreLevel();
|
|
}
|
|
}
|
|
|
|
bool nsXHTMLContentSerializer::IsElementPreformatted(nsIContent* aNode) {
|
|
MOZ_ASSERT(ShouldMaintainPreLevel(),
|
|
"We should not be calling this needlessly");
|
|
|
|
if (!aNode->IsElement()) {
|
|
return false;
|
|
}
|
|
RefPtr<const ComputedStyle> computedStyle =
|
|
nsComputedDOMStyle::GetComputedStyleNoFlush(aNode->AsElement());
|
|
if (computedStyle) {
|
|
const nsStyleText* textStyle = computedStyle->StyleText();
|
|
return textStyle->WhiteSpaceOrNewlineIsSignificant();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool nsXHTMLContentSerializer::SerializeLIValueAttribute(nsIContent* aElement,
|
|
nsAString& aStr) {
|
|
// We are copying and we are at the "first" LI node of OL in selected range.
|
|
// It may not be the first LI child of OL but it's first in the selected
|
|
// range. Note that we get into this condition only once per a OL.
|
|
bool found = false;
|
|
nsAutoString valueStr;
|
|
|
|
olState state(0, false);
|
|
|
|
if (!mOLStateStack.IsEmpty()) {
|
|
state = mOLStateStack[mOLStateStack.Length() - 1];
|
|
// isFirstListItem should be true only before the serialization of the
|
|
// first item in the list.
|
|
state.isFirstListItem = false;
|
|
mOLStateStack[mOLStateStack.Length() - 1] = state;
|
|
}
|
|
|
|
int32_t startVal = state.startVal;
|
|
int32_t offset = 0;
|
|
|
|
// Traverse previous siblings until we find one with "value" attribute.
|
|
// offset keeps track of how many previous siblings we had to traverse.
|
|
nsIContent* currNode = aElement;
|
|
while (currNode && !found) {
|
|
if (currNode->IsHTMLElement(nsGkAtoms::li)) {
|
|
currNode->AsElement()->GetAttr(nsGkAtoms::value, valueStr);
|
|
if (valueStr.IsEmpty()) {
|
|
offset++;
|
|
} else {
|
|
found = true;
|
|
nsresult rv = NS_OK;
|
|
startVal = valueStr.ToInteger(&rv);
|
|
}
|
|
}
|
|
currNode = currNode->GetPreviousSibling();
|
|
}
|
|
// If LI was not having "value", Set the "value" attribute for it.
|
|
// Note that We are at the first LI in the selected range of OL.
|
|
if (offset == 0 && found) {
|
|
// offset = 0 => LI itself has the value attribute and we did not need to
|
|
// traverse back. Just serialize value attribute like other tags.
|
|
NS_ENSURE_TRUE(SerializeAttr(u""_ns, u"value"_ns, valueStr, aStr, false),
|
|
false);
|
|
} else if (offset == 1 && !found) {
|
|
/*(offset = 1 && !found) means either LI is the first child node of OL
|
|
and LI is not having "value" attribute.
|
|
In that case we would not like to set "value" attribute to reduce the
|
|
changes.
|
|
*/
|
|
// do nothing...
|
|
} else if (offset > 0) {
|
|
// Set value attribute.
|
|
nsAutoString valueStr;
|
|
|
|
// As serializer needs to use this valueAttr we are creating here,
|
|
valueStr.AppendInt(startVal + offset);
|
|
NS_ENSURE_TRUE(SerializeAttr(u""_ns, u"value"_ns, valueStr, aStr, false),
|
|
false);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool nsXHTMLContentSerializer::IsFirstChildOfOL(nsIContent* aElement) {
|
|
nsIContent* parent = aElement->GetParent();
|
|
if (parent && parent->NodeName().LowerCaseEqualsLiteral("ol")) {
|
|
if (!mOLStateStack.IsEmpty()) {
|
|
olState state = mOLStateStack[mOLStateStack.Length() - 1];
|
|
if (state.isFirstListItem) return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool nsXHTMLContentSerializer::HasNoChildren(nsIContent* aContent) {
|
|
for (nsIContent* child = aContent->GetFirstChild(); child;
|
|
child = child->GetNextSibling()) {
|
|
if (!child->IsText()) return false;
|
|
|
|
if (child->TextLength()) return false;
|
|
}
|
|
|
|
return true;
|
|
}
|