826 lines
28 KiB
C++
826 lines
28 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 2004-2010, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: xmlparser.cpp
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2004jul21
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* created by: Andy Heninger
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*/
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#include <stdio.h>
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#include "unicode/uchar.h"
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#include "unicode/ucnv.h"
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#include "unicode/regex.h"
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#include "filestrm.h"
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#include "xmlparser.h"
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#if !UCONFIG_NO_REGULAR_EXPRESSIONS && !UCONFIG_NO_CONVERSION
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// character constants
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enum {
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x_QUOT=0x22,
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x_AMP=0x26,
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x_APOS=0x27,
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x_LT=0x3c,
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x_GT=0x3e,
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x_l=0x6c
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};
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#define XML_SPACES "[ \\u0009\\u000d\\u000a]"
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// XML #4
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#define XML_NAMESTARTCHAR "[[A-Z]:_[a-z][\\u00c0-\\u00d6][\\u00d8-\\u00f6]" \
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"[\\u00f8-\\u02ff][\\u0370-\\u037d][\\u037F-\\u1FFF][\\u200C-\\u200D]" \
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"[\\u2070-\\u218F][\\u2C00-\\u2FEF][\\u3001-\\uD7FF][\\uF900-\\uFDCF]" \
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"[\\uFDF0-\\uFFFD][\\U00010000-\\U000EFFFF]]"
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// XML #5
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#define XML_NAMECHAR "[" XML_NAMESTARTCHAR "\\-.[0-9]\\u00b7[\\u0300-\\u036f][\\u203f-\\u2040]]"
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// XML #6
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#define XML_NAME XML_NAMESTARTCHAR "(?:" XML_NAMECHAR ")*"
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U_NAMESPACE_BEGIN
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UXMLParser)
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UXMLElement)
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//
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// UXMLParser constructor. Mostly just initializes the ICU regexes that are
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// used for parsing.
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//
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UXMLParser::UXMLParser(UErrorCode &status) :
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// XML Declaration. XML Production #23.
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// example: "<?xml version=1.0 encoding="utf-16" ?>
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// This is a sloppy implementation - just look for the leading <?xml and the closing ?>
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// allow for a possible leading BOM.
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mXMLDecl(UnicodeString("(?s)\\uFEFF?<\\?xml.+?\\?>", -1, US_INV), 0, status),
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// XML Comment production #15
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// example: "<!-- whatever -->
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// note, does not detect an illegal "--" within comments
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mXMLComment(UnicodeString("(?s)<!--.+?-->", -1, US_INV), 0, status),
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// XML Spaces
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// production [3]
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mXMLSP(UnicodeString(XML_SPACES "+", -1, US_INV), 0, status),
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// XML Doctype decl production #28
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// example "<!DOCTYPE foo SYSTEM "somewhere" >
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// or "<!DOCTYPE foo [internal dtd]>
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// TODO: we don't actually parse the DOCTYPE or internal subsets.
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// Some internal dtd subsets could confuse this simple-minded
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// attempt at skipping over them, specifically, occcurences
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// of closeing square brackets. These could appear in comments,
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// or in parameter entity declarations, for example.
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mXMLDoctype(UnicodeString(
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"(?s)<!DOCTYPE.*?(>|\\[.*?\\].*?>)", -1, US_INV
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), 0, status),
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// XML PI production #16
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// example "<?target stuff?>
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mXMLPI(UnicodeString("(?s)<\\?.+?\\?>", -1, US_INV), 0, status),
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// XML Element Start Productions #40, #41
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// example <foo att1='abc' att2="d e f" >
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// capture #1: the tag name
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//
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mXMLElemStart (UnicodeString("(?s)<(" XML_NAME ")" // match "<tag_name"
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"(?:"
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XML_SPACES "+" XML_NAME XML_SPACES "*=" XML_SPACES "*" // match "ATTR_NAME = "
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"(?:(?:\\\'[^<\\\']*?\\\')|(?:\\\"[^<\\\"]*?\\\"))" // match '"attribute value"'
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")*" // * for zero or more attributes.
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XML_SPACES "*?>", -1, US_INV), 0, status), // match " >"
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// XML Element End production #42
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// example </foo>
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mXMLElemEnd (UnicodeString("</(" XML_NAME ")" XML_SPACES "*>", -1, US_INV), 0, status),
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// XML Element Empty production #44
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// example <foo att1="abc" att2="d e f" />
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mXMLElemEmpty (UnicodeString("(?s)<(" XML_NAME ")" // match "<tag_name"
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"(?:"
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XML_SPACES "+" XML_NAME XML_SPACES "*=" XML_SPACES "*" // match "ATTR_NAME = "
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"(?:(?:\\\'[^<\\\']*?\\\')|(?:\\\"[^<\\\"]*?\\\"))" // match '"attribute value"'
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")*" // * for zero or more attributes.
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XML_SPACES "*?/>", -1, US_INV), 0, status), // match " />"
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// XMLCharData. Everything but '<'. Note that & will be dealt with later.
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mXMLCharData(UnicodeString("(?s)[^<]*", -1, US_INV), 0, status),
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// Attribute name = "value". XML Productions 10, 40/41
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// Capture group 1 is name,
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// 2 is the attribute value, including the quotes.
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//
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// Note that attributes are scanned twice. The first time is with
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// the regex for an entire element start. There, the attributes
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// are checked syntactically, but not separted out one by one.
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// Here, we match a single attribute, and make its name and
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// attribute value available to the parser code.
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mAttrValue(UnicodeString(XML_SPACES "+(" XML_NAME ")" XML_SPACES "*=" XML_SPACES "*"
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"((?:\\\'[^<\\\']*?\\\')|(?:\\\"[^<\\\"]*?\\\"))", -1, US_INV), 0, status),
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mAttrNormalizer(UnicodeString(XML_SPACES, -1, US_INV), 0, status),
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// Match any of the new-line sequences in content.
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// All are changed to \u000a.
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mNewLineNormalizer(UnicodeString("\\u000d\\u000a|\\u000d\\u0085|\\u000a|\\u000d|\\u0085|\\u2028", -1, US_INV), 0, status),
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// & char references
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// We will figure out what we've got based on which capture group has content.
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// The last one is a catchall for unrecognized entity references..
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// 1 2 3 4 5 6 7 8
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mAmps(UnicodeString("&(?:(amp;)|(lt;)|(gt;)|(apos;)|(quot;)|#x([0-9A-Fa-f]{1,8});|#([0-9]{1,8});|(.))"),
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0, status),
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fNames(status),
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fElementStack(status),
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fOneLF((UChar)0x0a) // Plain new-line string, used in new line normalization.
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{
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}
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UXMLParser *
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UXMLParser::createParser(UErrorCode &errorCode) {
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if (U_FAILURE(errorCode)) {
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return NULL;
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} else {
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return new UXMLParser(errorCode);
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}
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}
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UXMLParser::~UXMLParser() {}
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UXMLElement *
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UXMLParser::parseFile(const char *filename, UErrorCode &errorCode) {
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char bytes[4096], charsetBuffer[100];
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FileStream *f;
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const char *charset, *pb;
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UnicodeString src;
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UConverter *cnv;
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UChar *buffer, *pu;
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int32_t fileLength, bytesLength, length, capacity;
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UBool flush;
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if(U_FAILURE(errorCode)) {
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return NULL;
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}
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f=T_FileStream_open(filename, "rb");
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if(f==NULL) {
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errorCode=U_FILE_ACCESS_ERROR;
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return NULL;
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}
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bytesLength=T_FileStream_read(f, bytes, (int32_t)sizeof(bytes));
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if(bytesLength<(int32_t)sizeof(bytes)) {
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// we have already read the entire file
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fileLength=bytesLength;
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} else {
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// get the file length
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fileLength=T_FileStream_size(f);
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}
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/*
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* get the charset:
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* 1. Unicode signature
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* 2. treat as ISO-8859-1 and read XML encoding="charser"
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* 3. default to UTF-8
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*/
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charset=ucnv_detectUnicodeSignature(bytes, bytesLength, NULL, &errorCode);
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if(U_SUCCESS(errorCode) && charset!=NULL) {
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// open converter according to Unicode signature
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cnv=ucnv_open(charset, &errorCode);
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} else {
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// read as Latin-1 and parse the XML declaration and encoding
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cnv=ucnv_open("ISO-8859-1", &errorCode);
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if(U_FAILURE(errorCode)) {
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// unexpected error opening Latin-1 converter
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goto exit;
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}
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buffer=src.getBuffer(bytesLength);
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if(buffer==NULL) {
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// unexpected failure to reserve some string capacity
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errorCode=U_MEMORY_ALLOCATION_ERROR;
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goto exit;
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}
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pb=bytes;
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pu=buffer;
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ucnv_toUnicode(
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cnv,
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&pu, buffer+src.getCapacity(),
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&pb, bytes+bytesLength,
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NULL, TRUE, &errorCode);
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src.releaseBuffer(U_SUCCESS(errorCode) ? (int32_t)(pu-buffer) : 0);
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ucnv_close(cnv);
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cnv=NULL;
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if(U_FAILURE(errorCode)) {
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// unexpected error in conversion from Latin-1
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src.remove();
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goto exit;
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}
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// parse XML declaration
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if(mXMLDecl.reset(src).lookingAt(0, errorCode)) {
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int32_t declEnd=mXMLDecl.end(errorCode);
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// go beyond <?xml
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int32_t pos=src.indexOf((UChar)x_l)+1;
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mAttrValue.reset(src);
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while(pos<declEnd && mAttrValue.lookingAt(pos, errorCode)) { // loop runs once per attribute on this element.
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UnicodeString attName = mAttrValue.group(1, errorCode);
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UnicodeString attValue = mAttrValue.group(2, errorCode);
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// Trim the quotes from the att value. These are left over from the original regex
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// that parsed the attribue, which couldn't conveniently strip them.
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attValue.remove(0,1); // one char from the beginning
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attValue.truncate(attValue.length()-1); // and one from the end.
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if(attName==UNICODE_STRING("encoding", 8)) {
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length=attValue.extract(0, 0x7fffffff, charsetBuffer, (int32_t)sizeof(charsetBuffer));
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charset=charsetBuffer;
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break;
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}
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pos = mAttrValue.end(2, errorCode);
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}
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if(charset==NULL) {
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// default to UTF-8
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charset="UTF-8";
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}
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cnv=ucnv_open(charset, &errorCode);
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}
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}
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if(U_FAILURE(errorCode)) {
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// unable to open the converter
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goto exit;
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}
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// convert the file contents
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capacity=fileLength; // estimated capacity
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src.getBuffer(capacity);
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src.releaseBuffer(0); // zero length
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flush=FALSE;
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for(;;) {
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// convert contents of bytes[bytesLength]
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pb=bytes;
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for(;;) {
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length=src.length();
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buffer=src.getBuffer(capacity);
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if(buffer==NULL) {
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// unexpected failure to reserve some string capacity
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errorCode=U_MEMORY_ALLOCATION_ERROR;
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goto exit;
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}
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pu=buffer+length;
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ucnv_toUnicode(
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cnv, &pu, buffer+src.getCapacity(),
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&pb, bytes+bytesLength,
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NULL, FALSE, &errorCode);
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src.releaseBuffer(U_SUCCESS(errorCode) ? (int32_t)(pu-buffer) : 0);
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if(errorCode==U_BUFFER_OVERFLOW_ERROR) {
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errorCode=U_ZERO_ERROR;
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capacity=(3*src.getCapacity())/2; // increase capacity by 50%
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} else {
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break;
|
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}
|
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}
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if(U_FAILURE(errorCode)) {
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break; // conversion error
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}
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|
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if(flush) {
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break; // completely converted the file
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}
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// read next block
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bytesLength=T_FileStream_read(f, bytes, (int32_t)sizeof(bytes));
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if(bytesLength==0) {
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// reached end of file, convert once more to flush the converter
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flush=TRUE;
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}
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};
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exit:
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ucnv_close(cnv);
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T_FileStream_close(f);
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if(U_SUCCESS(errorCode)) {
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return parse(src, errorCode);
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} else {
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return NULL;
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}
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}
|
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UXMLElement *
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UXMLParser::parse(const UnicodeString &src, UErrorCode &status) {
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if(U_FAILURE(status)) {
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return NULL;
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}
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UXMLElement *root = NULL;
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fPos = 0; // TODO use just a local pos variable and pass it into functions
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// where necessary?
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|
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// set all matchers to work on the input string
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mXMLDecl.reset(src);
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mXMLComment.reset(src);
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mXMLSP.reset(src);
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mXMLDoctype.reset(src);
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mXMLPI.reset(src);
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mXMLElemStart.reset(src);
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mXMLElemEnd.reset(src);
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mXMLElemEmpty.reset(src);
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mXMLCharData.reset(src);
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mAttrValue.reset(src);
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mAttrNormalizer.reset(src);
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mNewLineNormalizer.reset(src);
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mAmps.reset(src);
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|
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// Consume the XML Declaration, if present.
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if (mXMLDecl.lookingAt(fPos, status)) {
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fPos = mXMLDecl.end(status);
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}
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// Consume "misc" [XML production 27] appearing before DocType
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parseMisc(status);
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// Consume a DocType declaration, if present.
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if (mXMLDoctype.lookingAt(fPos, status)) {
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fPos = mXMLDoctype.end(status);
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}
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// Consume additional "misc" [XML production 27] appearing after the DocType
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parseMisc(status);
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// Get the root element
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if (mXMLElemEmpty.lookingAt(fPos, status)) {
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// Root is an empty element (no nested elements or content)
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root = createElement(mXMLElemEmpty, status);
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fPos = mXMLElemEmpty.end(status);
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} else {
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if (mXMLElemStart.lookingAt(fPos, status) == FALSE) {
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error("Root Element expected", status);
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goto errorExit;
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}
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root = createElement(mXMLElemStart, status);
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UXMLElement *el = root;
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|
|
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//
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// This is the loop that consumes the root element of the document,
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// including all nested content. Nested elements are handled by
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// explicit pushes/pops of the element stack; there is no recursion
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// in the control flow of this code.
|
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// "el" always refers to the current element, the one to which content
|
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// is being added. It is above the top of the element stack.
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for (;;) {
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// Nested Element Start
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if (mXMLElemStart.lookingAt(fPos, status)) {
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UXMLElement *t = createElement(mXMLElemStart, status);
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el->fChildren.addElement(t, status);
|
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t->fParent = el;
|
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fElementStack.push(el, status);
|
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el = t;
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continue;
|
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}
|
|
|
|
// Text Content. String is concatenated onto the current node's content,
|
|
// but only if it contains something other than spaces.
|
|
UnicodeString s = scanContent(status);
|
|
if (s.length() > 0) {
|
|
mXMLSP.reset(s);
|
|
if (mXMLSP.matches(status) == FALSE) {
|
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// This chunk of text contains something other than just
|
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// white space. Make a child node for it.
|
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replaceCharRefs(s, status);
|
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el->fChildren.addElement(s.clone(), status);
|
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}
|
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mXMLSP.reset(src); // The matchers need to stay set to the main input string.
|
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continue;
|
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}
|
|
|
|
// Comments. Discard.
|
|
if (mXMLComment.lookingAt(fPos, status)) {
|
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fPos = mXMLComment.end(status);
|
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continue;
|
|
}
|
|
|
|
// PIs. Discard.
|
|
if (mXMLPI.lookingAt(fPos, status)) {
|
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fPos = mXMLPI.end(status);
|
|
continue;
|
|
}
|
|
|
|
// Element End
|
|
if (mXMLElemEnd.lookingAt(fPos, status)) {
|
|
fPos = mXMLElemEnd.end(0, status);
|
|
const UnicodeString name = mXMLElemEnd.group(1, status);
|
|
if (name != *el->fName) {
|
|
error("Element start / end tag mismatch", status);
|
|
goto errorExit;
|
|
}
|
|
if (fElementStack.empty()) {
|
|
// Close of the root element. We're done with the doc.
|
|
el = NULL;
|
|
break;
|
|
}
|
|
el = (UXMLElement *)fElementStack.pop();
|
|
continue;
|
|
}
|
|
|
|
// Empty Element. Stored as a child of the current element, but not stacked.
|
|
if (mXMLElemEmpty.lookingAt(fPos, status)) {
|
|
UXMLElement *t = createElement(mXMLElemEmpty, status);
|
|
el->fChildren.addElement(t, status);
|
|
continue;
|
|
}
|
|
|
|
// Hit something within the document that doesn't match anything.
|
|
// It's an error.
|
|
error("Unrecognized markup", status);
|
|
break;
|
|
}
|
|
|
|
if (el != NULL || !fElementStack.empty()) {
|
|
// We bailed out early, for some reason.
|
|
error("Root element not closed.", status);
|
|
goto errorExit;
|
|
}
|
|
}
|
|
|
|
// Root Element parse is complete.
|
|
// Consume the annoying xml "Misc" that can appear at the end of the doc.
|
|
parseMisc(status);
|
|
|
|
// We should have reached the end of the input
|
|
if (fPos != src.length()) {
|
|
error("Extra content at the end of the document", status);
|
|
goto errorExit;
|
|
}
|
|
|
|
// Success!
|
|
return root;
|
|
|
|
errorExit:
|
|
delete root;
|
|
return NULL;
|
|
}
|
|
|
|
//
|
|
// createElement
|
|
// We've just matched an element start tag. Create and fill in a UXMLElement object
|
|
// for it.
|
|
//
|
|
UXMLElement *
|
|
UXMLParser::createElement(RegexMatcher &mEl, UErrorCode &status) {
|
|
// First capture group is the element's name.
|
|
UXMLElement *el = new UXMLElement(this, intern(mEl.group(1, status), status), status);
|
|
|
|
// Scan for attributes.
|
|
int32_t pos = mEl.end(1, status); // The position after the end of the tag name
|
|
|
|
while (mAttrValue.lookingAt(pos, status)) { // loop runs once per attribute on this element.
|
|
UnicodeString attName = mAttrValue.group(1, status);
|
|
UnicodeString attValue = mAttrValue.group(2, status);
|
|
|
|
// Trim the quotes from the att value. These are left over from the original regex
|
|
// that parsed the attribue, which couldn't conveniently strip them.
|
|
attValue.remove(0,1); // one char from the beginning
|
|
attValue.truncate(attValue.length()-1); // and one from the end.
|
|
|
|
// XML Attribue value normalization.
|
|
// This is one of the really screwy parts of the XML spec.
|
|
// See http://www.w3.org/TR/2004/REC-xml11-20040204/#AVNormalize
|
|
// Note that non-validating parsers must treat all entities as type CDATA
|
|
// which simplifies things some.
|
|
|
|
// Att normalization step 1: normalize any newlines in the attribute value
|
|
mNewLineNormalizer.reset(attValue);
|
|
attValue = mNewLineNormalizer.replaceAll(fOneLF, status);
|
|
|
|
// Next change all xml white space chars to plain \u0020 spaces.
|
|
mAttrNormalizer.reset(attValue);
|
|
UnicodeString oneSpace((UChar)0x0020);
|
|
attValue = mAttrNormalizer.replaceAll(oneSpace, status);
|
|
|
|
// Replace character entities.
|
|
replaceCharRefs(attValue, status);
|
|
|
|
// Save the attribute name and value in our document structure.
|
|
el->fAttNames.addElement((void *)intern(attName, status), status);
|
|
el->fAttValues.addElement(attValue.clone(), status);
|
|
pos = mAttrValue.end(2, status);
|
|
}
|
|
fPos = mEl.end(0, status);
|
|
return el;
|
|
}
|
|
|
|
//
|
|
// parseMisc
|
|
// Consume XML "Misc" [production #27]
|
|
// which is any combination of space, PI and comments
|
|
// Need to watch end-of-input because xml MISC stuff is allowed after
|
|
// the document element, so we WILL scan off the end in this function
|
|
//
|
|
void
|
|
UXMLParser::parseMisc(UErrorCode &status) {
|
|
for (;;) {
|
|
if (fPos >= mXMLPI.input().length()) {
|
|
break;
|
|
}
|
|
if (mXMLPI.lookingAt(fPos, status)) {
|
|
fPos = mXMLPI.end(status);
|
|
continue;
|
|
}
|
|
if (mXMLSP.lookingAt(fPos, status)) {
|
|
fPos = mXMLSP.end(status);
|
|
continue;
|
|
}
|
|
if (mXMLComment.lookingAt(fPos, status)) {
|
|
fPos = mXMLComment.end(status);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Scan for document content.
|
|
//
|
|
UnicodeString
|
|
UXMLParser::scanContent(UErrorCode &status) {
|
|
UnicodeString result;
|
|
if (mXMLCharData.lookingAt(fPos, status)) {
|
|
result = mXMLCharData.group((int32_t)0, status);
|
|
// Normalize the new-lines. (Before char ref substitution)
|
|
mNewLineNormalizer.reset(result);
|
|
result = mNewLineNormalizer.replaceAll(fOneLF, status);
|
|
|
|
// TODO: handle CDATA
|
|
fPos = mXMLCharData.end(0, status);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
//
|
|
// replaceCharRefs
|
|
//
|
|
// replace the char entities < & { ካ etc. in a string
|
|
// with the corresponding actual character.
|
|
//
|
|
void
|
|
UXMLParser::replaceCharRefs(UnicodeString &s, UErrorCode &status) {
|
|
UnicodeString result;
|
|
UnicodeString replacement;
|
|
int i;
|
|
|
|
mAmps.reset(s);
|
|
// See the initialization for the regex matcher mAmps.
|
|
// Which entity we've matched is determined by which capture group has content,
|
|
// which is flaged by start() of that group not being -1.
|
|
while (mAmps.find()) {
|
|
if (mAmps.start(1, status) != -1) {
|
|
replacement.setTo((UChar)x_AMP);
|
|
} else if (mAmps.start(2, status) != -1) {
|
|
replacement.setTo((UChar)x_LT);
|
|
} else if (mAmps.start(3, status) != -1) {
|
|
replacement.setTo((UChar)x_GT);
|
|
} else if (mAmps.start(4, status) != -1) {
|
|
replacement.setTo((UChar)x_APOS);
|
|
} else if (mAmps.start(5, status) != -1) {
|
|
replacement.setTo((UChar)x_QUOT);
|
|
} else if (mAmps.start(6, status) != -1) {
|
|
UnicodeString hexString = mAmps.group(6, status);
|
|
UChar32 val = 0;
|
|
for (i=0; i<hexString.length(); i++) {
|
|
val = (val << 4) + u_digit(hexString.charAt(i), 16);
|
|
}
|
|
// TODO: some verification that the character is valid
|
|
replacement.setTo(val);
|
|
} else if (mAmps.start(7, status) != -1) {
|
|
UnicodeString decimalString = mAmps.group(7, status);
|
|
UChar32 val = 0;
|
|
for (i=0; i<decimalString.length(); i++) {
|
|
val = val*10 + u_digit(decimalString.charAt(i), 10);
|
|
}
|
|
// TODO: some verification that the character is valid
|
|
replacement.setTo(val);
|
|
} else {
|
|
// An unrecognized &entity; Leave it alone.
|
|
// TODO: check that it really looks like an entity, and is not some
|
|
// random & in the text.
|
|
replacement = mAmps.group((int32_t)0, status);
|
|
}
|
|
mAmps.appendReplacement(result, replacement, status);
|
|
}
|
|
mAmps.appendTail(result);
|
|
s = result;
|
|
}
|
|
|
|
void
|
|
UXMLParser::error(const char *message, UErrorCode &status) {
|
|
// TODO: something better here...
|
|
const UnicodeString &src=mXMLDecl.input();
|
|
int line = 0;
|
|
int ci = 0;
|
|
while (ci < fPos && ci>=0) {
|
|
ci = src.indexOf((UChar)0x0a, ci+1);
|
|
line++;
|
|
}
|
|
fprintf(stderr, "Error: %s at line %d\n", message, line);
|
|
if (U_SUCCESS(status)) {
|
|
status = U_PARSE_ERROR;
|
|
}
|
|
}
|
|
|
|
// intern strings like in Java
|
|
|
|
const UnicodeString *
|
|
UXMLParser::intern(const UnicodeString &s, UErrorCode &errorCode) {
|
|
const UHashElement *he=fNames.find(s);
|
|
if(he!=NULL) {
|
|
// already a known name, return its hashed key pointer
|
|
return (const UnicodeString *)he->key.pointer;
|
|
} else {
|
|
// add this new name and return its hashed key pointer
|
|
fNames.puti(s, 0, errorCode);
|
|
he=fNames.find(s);
|
|
return (const UnicodeString *)he->key.pointer;
|
|
}
|
|
}
|
|
|
|
const UnicodeString *
|
|
UXMLParser::findName(const UnicodeString &s) const {
|
|
const UHashElement *he=fNames.find(s);
|
|
if(he!=NULL) {
|
|
// a known name, return its hashed key pointer
|
|
return (const UnicodeString *)he->key.pointer;
|
|
} else {
|
|
// unknown name
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
// UXMLElement ------------------------------------------------------------- ***
|
|
|
|
UXMLElement::UXMLElement(const UXMLParser *parser, const UnicodeString *name, UErrorCode &errorCode) :
|
|
fParser(parser),
|
|
fName(name),
|
|
fAttNames(errorCode),
|
|
fAttValues(errorCode),
|
|
fChildren(errorCode),
|
|
fParent(NULL)
|
|
{
|
|
}
|
|
|
|
UXMLElement::~UXMLElement() {
|
|
int i;
|
|
// attribute names are owned by the UXMLParser, don't delete them here
|
|
for (i=fAttValues.size()-1; i>=0; i--) {
|
|
delete (UObject *)fAttValues.elementAt(i);
|
|
}
|
|
for (i=fChildren.size()-1; i>=0; i--) {
|
|
delete (UObject *)fChildren.elementAt(i);
|
|
}
|
|
}
|
|
|
|
const UnicodeString &
|
|
UXMLElement::getTagName() const {
|
|
return *fName;
|
|
}
|
|
|
|
UnicodeString
|
|
UXMLElement::getText(UBool recurse) const {
|
|
UnicodeString text;
|
|
appendText(text, recurse);
|
|
return text;
|
|
}
|
|
|
|
void
|
|
UXMLElement::appendText(UnicodeString &text, UBool recurse) const {
|
|
const UObject *node;
|
|
int32_t i, count=fChildren.size();
|
|
for(i=0; i<count; ++i) {
|
|
node=(const UObject *)fChildren.elementAt(i);
|
|
const UnicodeString *s=dynamic_cast<const UnicodeString *>(node);
|
|
if(s!=NULL) {
|
|
text.append(*s);
|
|
} else if(recurse) /* must be a UXMLElement */ {
|
|
((const UXMLElement *)node)->appendText(text, recurse);
|
|
}
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
UXMLElement::countAttributes() const {
|
|
return fAttNames.size();
|
|
}
|
|
|
|
const UnicodeString *
|
|
UXMLElement::getAttribute(int32_t i, UnicodeString &name, UnicodeString &value) const {
|
|
if(0<=i && i<fAttNames.size()) {
|
|
name.setTo(*(const UnicodeString *)fAttNames.elementAt(i));
|
|
value.setTo(*(const UnicodeString *)fAttValues.elementAt(i));
|
|
return &value; // or return (UnicodeString *)fAttValues.elementAt(i);
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
const UnicodeString *
|
|
UXMLElement::getAttribute(const UnicodeString &name) const {
|
|
// search for the attribute name by comparing the interned pointer,
|
|
// not the string contents
|
|
const UnicodeString *p=fParser->findName(name);
|
|
if(p==NULL) {
|
|
return NULL; // no such attribute seen by the parser at all
|
|
}
|
|
|
|
int32_t i, count=fAttNames.size();
|
|
for(i=0; i<count; ++i) {
|
|
if(p==(const UnicodeString *)fAttNames.elementAt(i)) {
|
|
return (const UnicodeString *)fAttValues.elementAt(i);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int32_t
|
|
UXMLElement::countChildren() const {
|
|
return fChildren.size();
|
|
}
|
|
|
|
const UObject *
|
|
UXMLElement::getChild(int32_t i, UXMLNodeType &type) const {
|
|
if(0<=i && i<fChildren.size()) {
|
|
const UObject *node=(const UObject *)fChildren.elementAt(i);
|
|
if(dynamic_cast<const UXMLElement *>(node)!=NULL) {
|
|
type=UXML_NODE_TYPE_ELEMENT;
|
|
} else {
|
|
type=UXML_NODE_TYPE_STRING;
|
|
}
|
|
return node;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
const UXMLElement *
|
|
UXMLElement::nextChildElement(int32_t &i) const {
|
|
if(i<0) {
|
|
return NULL;
|
|
}
|
|
|
|
const UObject *node;
|
|
int32_t count=fChildren.size();
|
|
while(i<count) {
|
|
node=(const UObject *)fChildren.elementAt(i++);
|
|
const UXMLElement *elem=dynamic_cast<const UXMLElement *>(node);
|
|
if(elem!=NULL) {
|
|
return elem;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
const UXMLElement *
|
|
UXMLElement::getChildElement(const UnicodeString &name) const {
|
|
// search for the element name by comparing the interned pointer,
|
|
// not the string contents
|
|
const UnicodeString *p=fParser->findName(name);
|
|
if(p==NULL) {
|
|
return NULL; // no such element seen by the parser at all
|
|
}
|
|
|
|
const UObject *node;
|
|
int32_t i, count=fChildren.size();
|
|
for(i=0; i<count; ++i) {
|
|
node=(const UObject *)fChildren.elementAt(i);
|
|
const UXMLElement *elem=dynamic_cast<const UXMLElement *>(node);
|
|
if(elem!=NULL) {
|
|
if(p==elem->fName) {
|
|
return elem;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif /* !UCONFIG_NO_REGULAR_EXPRESSIONS */
|
|
|