nsXHTMLContentSerializer.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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/. */

/*

 * nsIContentSerializer implementation that can be used with an

 * nsIDocumentEncoder to convert an XHTML (not HTML!) DOM to an XHTML

 * string that could be parsed into more or less the original DOM.

*/

#ifndef nsXHTMLContentSerializer_h__

#define nsXHTMLContentSerializer_h__

#include "mozilla/Attributes.h"

#include "nsXMLContentSerializer.h"

#include "nsString.h"

#include "nsTArray.h"

class nsIContent;

class nsAtom;

namespace mozilla {

class Encoding;

class nsXHTMLContentSerializer : public nsXMLContentSerializer {

 public:

  nsXHTMLContentSerializer();

  virtual ~nsXHTMLContentSerializer();

  NS_IMETHOD Init(uint32_t flags, uint32_t aWrapColumn,

                  const mozilla::Encoding* aEncoding, bool aIsCopying,

                  bool aRewriteEncodingDeclaration,

                  bool* aNeedsPreformatScanning, nsAString& aOutput) override;

  NS_IMETHOD AppendText(nsIContent* aText, int32_t aStartOffset,

                        int32_t aEndOffset) override;

  NS_IMETHOD AppendDocumentStart(mozilla::dom::Document* aDocument) override;

 protected:

  virtual bool CheckElementStart(mozilla::dom::Element* aElement,

                                 bool& aForceFormat, nsAString& aStr,

                                 nsresult& aResult) override;

  [[nodiscard]] virtual bool AfterElementStart(nsIContent* aContent,

                                               nsIContent* aOriginalElement,

                                               nsAString& aStr) override;

  virtual bool CheckElementEnd(mozilla::dom::Element* aContent,

                               mozilla::dom::Element* aOriginalElement,

                               bool& aForceFormat, nsAString& aStr) override;

  virtual void AfterElementEnd(nsIContent* aContent, nsAString& aStr) override;

  virtual bool LineBreakBeforeOpen(int32_t aNamespaceID,

                                   nsAtom* aName) override;

  virtual bool LineBreakAfterOpen(int32_t aNamespaceID, nsAtom* aName) override;

  virtual bool LineBreakBeforeClose(int32_t aNamespaceID,

                                    nsAtom* aName) override;

  virtual bool LineBreakAfterClose(int32_t aNamespaceID,

                                   nsAtom* aName) override;

  bool HasLongLines(const nsString& text, int32_t& aLastNewlineOffset);

  // functions to check if we enter in or leave from a preformated content

  virtual void MaybeEnterInPreContent(nsIContent* aNode) override;

  virtual void MaybeLeaveFromPreContent(nsIContent* aNode) override;

  [[nodiscard]] virtual bool SerializeAttributes(

      mozilla::dom::Element* aContent, mozilla::dom::Element* aOriginalElement,

      nsAString& aTagPrefix, const nsAString& aTagNamespaceURI,

      nsAtom* aTagName, nsAString& aStr, uint32_t aSkipAttr,

      bool aAddNSAttr) override;

  bool IsFirstChildOfOL(nsIContent* aElement);

  [[nodiscard]] bool SerializeLIValueAttribute(nsIContent* aElement,

                                               nsAString& aStr);

  bool IsShorthandAttr(const nsAtom* aAttrName, const nsAtom* aElementName);

  [[nodiscard]] virtual bool AppendAndTranslateEntities(

      const nsAString& aStr, nsAString& aOutputStr) override;

 private:

  bool IsElementPreformatted(nsIContent* aNode);

 protected:

/*

   * isHTMLParser should be set to true by the HTML parser which inherits from

   * this class. It avoids to redefine methods just for few changes.

*/

  bool mIsHTMLSerializer;

  bool mIsCopying;  // Set to true only while copying

/*

   * mDisableEntityEncoding is higher than 0 while the serializer is serializing

   * the content of a element whose content is considerd CDATA by the

   * serializer (such elements are 'script', 'style', 'noscript' and

   * possibly others in XHTML) This doesn't have anything to do with if the

   * element is defined as CDATA in the DTD, it simply means we'll

   * output the content of the element without doing any entity encoding

   * what so ever.

*/

  int32_t mDisableEntityEncoding;

  // This is to ensure that we only do meta tag fixups when dealing with

  // whole documents.

  bool mRewriteEncodingDeclaration;

  // To keep track of First LI child of OL in selected range

  bool mIsFirstChildOfOL;

  // To keep track of startvalue of OL and first list item for nested lists

  struct olState {

    olState(int32_t aStart, bool aIsFirst)

        : startVal(aStart), isFirstListItem(aIsFirst) {}

    olState(const olState& aOlState) {

      startVal = aOlState.startVal;

      isFirstListItem = aOlState.isFirstListItem;

    // the value of the start attribute in the OL

    int32_t startVal;

    // is true only before the serialization of the first li of an ol

    // should be false for other li in the list

    bool isFirstListItem;

};

  // Stack to store one olState struct per <OL>.

  AutoTArray<olState, 8> mOLStateStack;

  bool HasNoChildren(nsIContent* aContent);

};

nsresult NS_NewXHTMLContentSerializer(nsIContentSerializer** aSerializer);

#endif