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//
// HTMLNode.m
// StackOverflow
//
// Created by Ben Reeves on 09/03/2010.
// Copyright 2010 Ben Reeves. All rights reserved.
//
#import "HTMLNode.h"
#import <libxml/HTMLtree.h>
@implementation HTMLNode
-(HTMLNode*)parent
{
return [[[HTMLNode alloc] initWithXMLNode:_node->parent] autorelease];
}
-(HTMLNode*)nextSibling {
return [[[HTMLNode alloc] initWithXMLNode:_node->next] autorelease];
}
-(HTMLNode*)previousSibling {
return [[[HTMLNode alloc] initWithXMLNode:_node->prev] autorelease];
}
void setAttributeNamed(xmlNode * node, const char * nameStr, const char * value) {
// adk - new val will be disposed in HTMLParser->dealloc
// xmlFreeDoc(_doc); will be invoked there
#ifndef __clang_analyzer__
char * newVal = (char *)malloc(strlen(value)+1);
memcpy (newVal, value, strlen(value)+1);
#else
char* newVal = NULL;
#endif
for(xmlAttrPtr attr = node->properties; NULL != attr; attr = attr->next)
{
if (strcmp((char*)attr->name, nameStr) == 0)
{
for(xmlNode * child = attr->children; NULL != child; child = child->next)
{
free(child->content);
child->content = (xmlChar*)newVal;
break;
}
break;
}
}
}
NSString * getAttributeNamed(xmlNode * node, const char * nameStr)
{
for(xmlAttrPtr attr = node->properties; NULL != attr; attr = attr->next)
{
if (strcmp((char*)attr->name, nameStr) == 0)
{
for(xmlNode * child = attr->children; NULL != child; child = child->next)
{
return [NSString stringWithCString:(void*)child->content encoding:NSUTF8StringEncoding];
}
break;
}
}
return NULL;
}
-(NSString*)getAttributeNamed:(NSString*)name
{
const char * nameStr = [name UTF8String];
return getAttributeNamed(_node, nameStr);
}
//Returns the class name
-(NSString*)className
{
return [self getAttributeNamed:@"class"];
}
//Returns the tag name
-(NSString*)tagName
{
return [NSString stringWithCString:(void*)_node->name encoding:NSUTF8StringEncoding];
}
-(HTMLNode*)firstChild
{
return [[[HTMLNode alloc] initWithXMLNode:_node->children] autorelease];
}
-(void)findChildrenWithAttribute:(const char*)attribute matchingName:(const char*)className inXMLNode:(xmlNode *)node inArray:(NSMutableArray*)array allowPartial:(BOOL)partial
{
xmlNode *cur_node = NULL;
const char * classNameStr = className;
//BOOL found = NO;
for (cur_node = node; cur_node; cur_node = cur_node->next)
{
for(xmlAttrPtr attr = cur_node->properties; NULL != attr; attr = attr->next)
{
if (strcmp((char*)attr->name, attribute) == 0)
{
for(xmlNode * child = attr->children; NULL != child; child = child->next)
{
BOOL match = NO;
if (!partial && strcmp((char*)child->content, classNameStr) == 0)
match = YES;
else if (partial && strstr ((char*)child->content, classNameStr) != NULL)
match = YES;
if (match)
{
//Found node
HTMLNode * nNode = [[[HTMLNode alloc] initWithXMLNode:cur_node] autorelease];
[array addObject:nNode];
break;
}
}
break;
}
}
[self findChildrenWithAttribute:attribute matchingName:className inXMLNode:cur_node->children inArray:array allowPartial:partial];
}
}
-(void)findChildTags:(NSString*)tagName inXMLNode:(xmlNode *)node inArray:(NSMutableArray*)array
{
xmlNode *cur_node = NULL;
const char * tagNameStr = [tagName UTF8String];
if (tagNameStr == nil)
return;
for (cur_node = node; cur_node; cur_node = cur_node->next)
{
if (cur_node->name && strcmp((char*)cur_node->name, tagNameStr) == 0)
{
HTMLNode * node = [[[HTMLNode alloc] initWithXMLNode:cur_node] autorelease];
[array addObject:node];
}
[self findChildTags:tagName inXMLNode:cur_node->children inArray:array];
}
}
-(NSArray*)findChildTags:(NSString*)tagName
{
NSMutableArray * array = [NSMutableArray array];
[self findChildTags:tagName inXMLNode:_node->children inArray:array];
return array;
}
-(HTMLNode*)findChildTag:(NSString*)tagName inXMLNode:(xmlNode *)node
{
xmlNode *cur_node = NULL;
const char * tagNameStr = [tagName UTF8String];
for (cur_node = node; cur_node; cur_node = cur_node->next)
{
if (cur_node && cur_node->name && strcmp((char*)cur_node->name, tagNameStr) == 0)
{
return [[[HTMLNode alloc] initWithXMLNode:cur_node] autorelease];
}
HTMLNode * cNode = [self findChildTag:tagName inXMLNode:cur_node->children];
if (cNode != NULL)
{
return cNode;
}
}
return NULL;
}
-(HTMLNode*)findChildTag:(NSString*)tagName
{
return [self findChildTag:tagName inXMLNode:_node->children];
}
-(NSArray*)children
{
xmlNode *cur_node = NULL;
NSMutableArray * array = [NSMutableArray array];
for (cur_node = _node->children; cur_node; cur_node = cur_node->next)
{
HTMLNode * node = [[[HTMLNode alloc] initWithXMLNode:cur_node] autorelease];
[array addObject:node];
}
return array;
}
/*
-(NSString*)description
{
NSString * string = [NSString stringWithFormat:@"<%s>%@\n", _node->name, [self contents]];
for (HTMLNode * child in [self children])
{
string = [string stringByAppendingString:[child description]];
}
string = [string stringByAppendingString:[NSString stringWithFormat:@"<%s>\n", _node->name]];
return string;
}*/
-(HTMLNode*)findChildWithAttribute:(const char*)attribute matchingName:(const char*)name inXMLNode:(xmlNode *)node allowPartial:(BOOL)partial
{
xmlNode *cur_node = NULL;
const char * classNameStr = name;
//BOOL found = NO;
if (node == NULL)
return NULL;
for (cur_node = node; cur_node; cur_node = cur_node->next)
{
for(xmlAttrPtr attr = cur_node->properties; NULL != attr; attr = attr->next)
{
if (strcmp((char*)attr->name, attribute) == 0)
{
for(xmlNode * child = attr->children; NULL != child; child = child->next)
{
BOOL match = NO;
if (!partial && strcmp((char*)child->content, classNameStr) == 0)
match = YES;
else if (partial && strstr ((char*)child->content, classNameStr) != NULL)
match = YES;
if (match)
{
return [[[HTMLNode alloc] initWithXMLNode:cur_node] autorelease];
}
}
break;
}
}
HTMLNode * cNode = [self findChildWithAttribute:attribute matchingName:name inXMLNode:cur_node->children allowPartial:partial];
if (cNode != NULL)
{
return cNode;
}
}
return NULL;
}
-(HTMLNode*)findChildWithAttribute:(NSString*)attribute matchingName:(NSString*)className allowPartial:(BOOL)partial
{
return [self findChildWithAttribute:[attribute UTF8String] matchingName:[className UTF8String] inXMLNode:_node->children allowPartial:partial];
}
-(HTMLNode*)findChildOfClass:(NSString*)className
{
HTMLNode * node = [self findChildWithAttribute:"class" matchingName:[className UTF8String] inXMLNode:_node->children allowPartial:NO];
return node;
}
-(NSArray*)findChildrenWithAttribute:(NSString*)attribute matchingName:(NSString*)className allowPartial:(BOOL)partial
{
NSMutableArray * array = [NSMutableArray array];
[self findChildrenWithAttribute:[attribute UTF8String] matchingName:[className UTF8String] inXMLNode:_node->children inArray:array allowPartial:partial];
return array;
}
-(NSArray*)findChildrenOfClass:(NSString*)className
{
return [self findChildrenWithAttribute:@"class" matchingName:className allowPartial:NO];
}
-(id)initWithXMLNode:(xmlNode*)xmlNode
{
if (self = [super init])
{
_node = xmlNode;
}
return self;
}
-(void)appendChildContentsToString:(NSMutableString*)string inNode:(xmlNode*)node
{
if (node == NULL)
return;
xmlNode *cur_node = NULL;
for (cur_node = node; cur_node; cur_node = cur_node->next)
{
if (cur_node->content)
{
[string appendString:[NSString stringWithCString:(void*)cur_node->content encoding:NSUTF8StringEncoding]];
}
[self appendChildContentsToString:string inNode:cur_node->children];
}
}
-(NSString*)contents
{
if (_node->children && _node->children->content)
{
return [NSString stringWithCString:(void*)_node->children->content encoding:NSUTF8StringEncoding];
}
return nil;
}
HTMLNodeType nodeType(xmlNode * _node)
{
if (_node == NULL || _node->name == NULL)
return HTMLUnkownNode;
const char * tagName = (const char*)_node->name;
if (strcmp(tagName, "a") == 0)
return HTMLHrefNode;
else if (strcmp(tagName, "text") == 0)
return HTMLTextNode;
else if (strcmp(tagName, "code") == 0)
return HTMLCodeNode;
else if (strcmp(tagName, "span") == 0)
return HTMLSpanNode;
else if (strcmp(tagName, "p") == 0)
return HTMLPNode;
else if (strcmp(tagName, "ul") == 0)
return HTMLUlNode;
else if (strcmp(tagName, "li") == 0)
return HTMLLiNode;
else if (strcmp(tagName, "image") == 0)
return HTMLImageNode;
else if (strcmp(tagName, "ol") == 0)
return HTMLOlNode;
else if (strcmp(tagName, "strong") == 0)
return HTMLStrongNode;
else if (strcmp(tagName, "pre") == 0)
return HTMLPreNode;
else if (strcmp(tagName, "blockquote") == 0)
return HTMLBlockQuoteNode;
else
return HTMLUnkownNode;
}
-(HTMLNodeType)nodetype
{
return nodeType(_node);
}
NSString * allNodeContents(xmlNode*node)
{
if (node == NULL)
return nil;
void * contents = xmlNodeGetContent(node);
if (contents)
{
NSString * string = [NSString stringWithCString:contents encoding:NSUTF8StringEncoding];
xmlFree(contents);
return string;
}
return @"";
}
-(NSString*)allContents
{
return allNodeContents(_node);
}
NSString * rawContentsOfNode(xmlNode * node)
{
xmlBufferPtr buffer = xmlBufferCreateSize(1000);
xmlOutputBufferPtr buf = xmlOutputBufferCreateBuffer(buffer, NULL);
htmlNodeDumpOutput(buf, node->doc, node, (const char*)node->doc->encoding);
xmlOutputBufferFlush(buf);
NSString * string = nil;
if (buffer->content) {
string = [[[NSString alloc] initWithBytes:(const void *)xmlBufferContent(buffer) length:xmlBufferLength(buffer) encoding:NSUTF8StringEncoding] autorelease];
}
xmlOutputBufferClose(buf);
xmlBufferFree(buffer);
return string;
}
-(NSString*)rawContents {
return rawContentsOfNode(_node);
}
@end
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