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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <objc/objc-runtime.h>
#import "OOoMetaDataParser.h"
static NSSet *singleValueXMLElements;
static NSSet *multiValueXMLElements;
static NSDictionary *metaXML2MDIKeys;
@implementation OOoMetaDataParser
+ (void)initialize
{
static BOOL isInitialized = NO;
if (isInitialized == NO) {
//set up the meta elements with only one value
NSMutableSet *temp = [NSMutableSet new];
//FIXME these should use namespace URIs and not prefixes
[temp addObject:@"dc:title"];
[temp addObject:@"dc:description"];
[temp addObject:@"meta:user-defined"];
singleValueXMLElements = [[NSSet setWithSet:temp] retain];
//set up the meta elements that can have more than one value
[temp removeAllObjects];
[temp addObject:@"dc:subject"];
[temp addObject:@"meta:keyword"];
[temp addObject:@"meta:initial-creator"];
[temp addObject:@"dc:creator"];
multiValueXMLElements = [[NSSet setWithSet:temp] retain];
[temp release];
//set up the map to store the values with the correct MDI keys
NSMutableDictionary *tempDict = [NSMutableDictionary new];
[tempDict setObject:(NSString*)kMDItemTitle forKey:@"dc:title"];
[tempDict setObject:(NSString*)kMDItemDescription forKey:@"dc:description"];
[tempDict setObject:(NSString*)kMDItemKeywords forKey:@"dc:subject"];
[tempDict setObject:(NSString*)kMDItemAuthors forKey:@"meta:initial-creator"];
[tempDict setObject:(NSString*)kMDItemAuthors forKey:@"dc:creator"];
[tempDict setObject:(NSString*)kMDItemKeywords forKey:@"meta:keyword"];
[tempDict setObject:@"org_openoffice_opendocument_custominfo1" forKey:@"Info 1"];
[tempDict setObject:@"org_openoffice_opendocument_custominfo2" forKey:@"Info 2"];
[tempDict setObject:@"org_openoffice_opendocument_custominfo3" forKey:@"Info 3"];
[tempDict setObject:@"org_openoffice_opendocument_custominfo4" forKey:@"Info 4"];
metaXML2MDIKeys = [[NSDictionary dictionaryWithDictionary:tempDict] retain];
[tempDict release];
isInitialized = YES;
}
}
- (id)init
{
if ((self = [super init]) != nil) {
shouldReadCharacters = NO;
textCurrentElement = nil;
return self;
}
return nil;
}
- (void)parseXML:(NSData*)data intoDictionary:(NSMutableDictionary*)dict
{
metaValues = dict;
//NSLog(@"data: %@ %d", data, [data length]);
//init parser settings
shouldReadCharacters = NO;
NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];
// class 'OOoMetaDataParser' does not implement the 'NSXMLParserDelegate' protocol
// So instead of this:
// [parser setDelegate:self];
// do this:
objc_msgSend(parser, @selector(setDelegate:), self);
[parser setShouldResolveExternalEntities:NO];
[parser parse];
[parser release];
//NSLog(@"finished parsing meta");
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict
{
(void) parser; // unused
(void) namespaceURI; // FIXME this should not be ignored but should be used
// instead of meta: prefix in the comparison below!
(void) qualifiedName; // unused
// NSLog(@"<%@>", elementName);
if ([singleValueXMLElements containsObject:elementName] == YES) {
shouldReadCharacters = YES;
} else if ([multiValueXMLElements containsObject:elementName] == YES) {
shouldReadCharacters = YES;
} else {
//we are not interested in this element
shouldReadCharacters = NO;
return;
}
if (shouldReadCharacters == YES) {
textCurrentElement = [NSMutableString new];
isCustom = [elementName isEqualToString:@"meta:user-defined"];
if (isCustom == YES) {
customAttribute = [[attributeDict objectForKey:@"meta:name"] retain];
//NSLog(customAttribute);
}
}
//NSLog(@"start element %@", elementName);
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
(void) parser; // unused
(void) namespaceURI; // unused
(void) qName; // unused
// NSLog(@"</%@>", elementName);
if (shouldReadCharacters == YES) {
NSString *mdiName = nil;
if (isCustom == YES) {
mdiName = (NSString*)[metaXML2MDIKeys objectForKey:customAttribute];
} else {
mdiName = (NSString*)[metaXML2MDIKeys objectForKey:elementName];
}
//NSLog(@"mdiName: %@", mdiName);
if (mdiName == nil) {
return;
}
if ([singleValueXMLElements containsObject:elementName] == YES) {
[metaValues setObject:textCurrentElement forKey:mdiName];
} else {
// must be multi-value
NSMutableArray *arr = [metaValues objectForKey:mdiName];
if (arr == nil) {
// we have no array yet, create it
arr = [[NSMutableArray new] autorelease];
// and store it
[metaValues setObject:arr forKey:mdiName];
}
// only store an element once, no need for duplicates
if ([arr containsObject:textCurrentElement] == NO) {
[arr addObject:textCurrentElement];
}
}
// cleanup part 1
[textCurrentElement release];
if (isCustom == YES) {
[customAttribute release];
}
}
//cleanup part 2
shouldReadCharacters = NO;
isCustom = NO;
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
(void) parser; // unused
// NSLog(@"%@", string);
if (shouldReadCharacters == NO) {
return;
}
// this delegate method might be called several times for a single element,
// so we have to collect the received data
[textCurrentElement appendString:string];
//NSLog(@"chars read: %@", string);
}
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError
{
//NSLog(@"parsing finished with error");
NSLog(@"Error %li, Description: %@, Line: %li, Column: %li", (long) [parseError code],
[[parser parserError] localizedDescription], (long) [parser lineNumber],
(long) [parser columnNumber]);
}
@end
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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