cef/include/capi/cef_xml_reader_capi.h

// Copyright (c) 2023 Marshall A. Greenblatt. All rights reserved.
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#ifndef CEF_INCLUDE_CAPI_CEF_XML_READER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_XML_READER_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_stream_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

///
/// Structure that supports the reading of XML data via the libxml streaming
/// API. The functions of this structure should only be called on the thread
/// that creates the object.
///
typedef struct _cef_xml_reader_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Moves the cursor to the next node in the document. This function must be
  /// called at least once to set the current cursor position. Returns true (1)
  /// if the cursor position was set successfully.
  ///
  int(CEF_CALLBACK* move_to_next_node)(struct _cef_xml_reader_t* self);

  ///
  /// Close the document. This should be called directly to ensure that cleanup
  /// occurs on the correct thread.
  ///
  int(CEF_CALLBACK* close)(struct _cef_xml_reader_t* self);

  ///
  /// Returns true (1) if an error has been reported by the XML parser.
  ///
  int(CEF_CALLBACK* has_error)(struct _cef_xml_reader_t* self);

  ///
  /// Returns the error string.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_error)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns the node type.
  ///
  cef_xml_node_type_t(CEF_CALLBACK* get_type)(struct _cef_xml_reader_t* self);

  ///
  /// Returns the node depth. Depth starts at 0 for the root node.
  ///
  int(CEF_CALLBACK* get_depth)(struct _cef_xml_reader_t* self);

  ///
  /// Returns the local name. See http://www.w3.org/TR/REC-xml-names/#NT-
  /// LocalPart for additional details.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_local_name)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns the namespace prefix. See http://www.w3.org/TR/REC-xml-names/ for
  /// additional details.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_prefix)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns the qualified name, equal to (Prefix:)LocalName. See
  /// http://www.w3.org/TR/REC-xml-names/#ns-qualnames for additional details.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_qualified_name)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns the URI defining the namespace associated with the node. See
  /// http://www.w3.org/TR/REC-xml-names/ for additional details.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_namespace_uri)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns the base URI of the node. See http://www.w3.org/TR/xmlbase/ for
  /// additional details.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_base_uri)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns the xml:lang scope within which the node resides. See
  /// http://www.w3.org/TR/REC-xml/#sec-lang-tag for additional details.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_xml_lang)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns true (1) if the node represents an NULL element. "<a/>" is
  /// considered NULL but "<a></a>" is not.
  ///
  int(CEF_CALLBACK* is_empty_element)(struct _cef_xml_reader_t* self);

  ///
  /// Returns true (1) if the node has a text value.
  ///
  int(CEF_CALLBACK* has_value)(struct _cef_xml_reader_t* self);

  ///
  /// Returns the text value.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_value)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns true (1) if the node has attributes.
  ///
  int(CEF_CALLBACK* has_attributes)(struct _cef_xml_reader_t* self);

  ///
  /// Returns the number of attributes.
  ///
  size_t(CEF_CALLBACK* get_attribute_count)(struct _cef_xml_reader_t* self);

  ///
  /// Returns the value of the attribute at the specified 0-based index.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_attribute_byindex)(
      struct _cef_xml_reader_t* self,
      int index);

  ///
  /// Returns the value of the attribute with the specified qualified name.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_attribute_byqname)(
      struct _cef_xml_reader_t* self,
      const cef_string_t* qualifiedName);

  ///
  /// Returns the value of the attribute with the specified local name and
  /// namespace URI.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_attribute_bylname)(
      struct _cef_xml_reader_t* self,
      const cef_string_t* localName,
      const cef_string_t* namespaceURI);

  ///
  /// Returns an XML representation of the current node's children.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_inner_xml)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns an XML representation of the current node including its children.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_outer_xml)(
      struct _cef_xml_reader_t* self);

  ///
  /// Returns the line number for the current node.
  ///
  int(CEF_CALLBACK* get_line_number)(struct _cef_xml_reader_t* self);

  ///
  /// Moves the cursor to the attribute at the specified 0-based index. Returns
  /// true (1) if the cursor position was set successfully.
  ///
  int(CEF_CALLBACK* move_to_attribute_byindex)(struct _cef_xml_reader_t* self,
                                               int index);

  ///
  /// Moves the cursor to the attribute with the specified qualified name.
  /// Returns true (1) if the cursor position was set successfully.
  ///
  int(CEF_CALLBACK* move_to_attribute_byqname)(
      struct _cef_xml_reader_t* self,
      const cef_string_t* qualifiedName);

  ///
  /// Moves the cursor to the attribute with the specified local name and
  /// namespace URI. Returns true (1) if the cursor position was set
  /// successfully.
  ///
  int(CEF_CALLBACK* move_to_attribute_bylname)(
      struct _cef_xml_reader_t* self,
      const cef_string_t* localName,
      const cef_string_t* namespaceURI);

  ///
  /// Moves the cursor to the first attribute in the current element. Returns
  /// true (1) if the cursor position was set successfully.
  ///
  int(CEF_CALLBACK* move_to_first_attribute)(struct _cef_xml_reader_t* self);

  ///
  /// Moves the cursor to the next attribute in the current element. Returns
  /// true (1) if the cursor position was set successfully.
  ///
  int(CEF_CALLBACK* move_to_next_attribute)(struct _cef_xml_reader_t* self);

  ///
  /// Moves the cursor back to the carrying element. Returns true (1) if the
  /// cursor position was set successfully.
  ///
  int(CEF_CALLBACK* move_to_carrying_element)(struct _cef_xml_reader_t* self);
} cef_xml_reader_t;

///
/// Create a new cef_xml_reader_t object. The returned object's functions can
/// only be called from the thread that created the object.
///
CEF_EXPORT cef_xml_reader_t* cef_xml_reader_create(
    struct _cef_stream_reader_t* stream,
    cef_xml_encoding_type_t encodingType,
    const cef_string_t* URI);

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_XML_READER_CAPI_H_