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HTMLNode.swift
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320 lines (277 loc) · 8.66 KB
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/**@file
* @brief Swift-HTML-Parser
* @author _tid_
*/
import Foundation
/**
* HTMLNode
*/
public class HTMLNode {
public enum HTMLNodeType : String {
case HTMLUnkownNode = ""
case HTMLHrefNode = "href"
case HTMLTextNode = "text"
case HTMLCodeNode = "code"
case HTMLSpanNode = "span"
case HTMLPNode = "p"
case HTMLLiNode = "li"
case HTMLUiNode = "ui"
case HTMLImageNode = "image"
case HTMLOlNode = "ol"
case HTMLStrongNode = "strong"
case HTMLPreNode = "pre"
case HTMLBlockQuoteNode = "blockquote"
}
private var doc : htmlDocPtr
private var node : xmlNode?
private var pointer : xmlNodePtr
private let nodeType : HTMLNodeType = HTMLNodeType.HTMLUnkownNode
/**
* 親ノード
*/
private var parent : HTMLNode? {
if let p = self.node?.parent {
return HTMLNode(doc: self.doc, node: p)
}
return nil
}
/**
* 次ノード
*/
private var next : HTMLNode? {
if let n : UnsafeMutablePointer<xmlNode> = node?.next {
if n != nil {
return HTMLNode(doc: doc, node: n)
}
}
return nil
}
/**
* 子ノード
*/
private var child : HTMLNode? {
if let c = node?.children {
if c != nil {
return HTMLNode(doc: doc, node: c)
}
}
return nil
}
/**
* クラス名
*/
public var className : String {
return getAttributeNamed("class")
}
/**
* タグ名
*/
public var tagName : String {
if node != nil {
return ConvXmlCharToString(self.node!.name)
}
return ""
}
/**
* コンテンツ
*/
public var contents : String {
if node != nil {
var n = self.node!.children
if n != nil {
return ConvXmlCharToString(n.memory.content)
}
}
return ""
}
public var rawContents : String {
if node != nil {
return rawContentsOfNode(self.node!, self.pointer)
}
return ""
}
/**
* Initializer
* @param[in] doc xmlDoc
*/
public init(doc: htmlDocPtr = nil) {
self.doc = doc
var node = xmlDocGetRootElement(doc)
self.pointer = node
if node != nil {
self.node = node.memory
}
}
private init(doc: htmlDocPtr, node: UnsafePointer<xmlNode>) {
self.doc = doc
self.node = node.memory
self.pointer = xmlNodePtr(node)
if let type = HTMLNodeType(rawValue: tagName) {
nodeType = type
}
}
/**
* 属性名を取得する
* @param[in] name 属性
* @return 属性名
*/
public func getAttributeNamed(name: String) -> String {
for var attr : xmlAttrPtr = node!.properties; attr != nil; attr = attr.memory.next {
var mem = attr.memory
if name == ConvXmlCharToString(mem.name) {
return ConvXmlCharToString(mem.children.memory.content)
}
}
return ""
}
/**
* タグ名に一致する全ての子ノードを探す
* @param[in] tagName タグ名
* @return 子ノードの配列
*/
public func findChildTags(tagName: String) -> [HTMLNode] {
var nodes : [HTMLNode] = []
return findChildTags(tagName, node: self.child, retAry: &nodes)
}
private func findChildTags(tagName: String, node: HTMLNode?, inout retAry: [HTMLNode] ) -> [HTMLNode] {
if let n = node {
for curNode in n {
if curNode.tagName == tagName {
retAry.append(curNode)
}
findChildTags(tagName, node: curNode.child, retAry: &retAry)
}
}
return retAry
}
/**
* タグ名で子ノードを探す
* @param[in] tagName タグ名
* @return 子ノード。見つからなければnil
*/
public func findChildTag(tagName: String) -> HTMLNode? {
return findChildTag(tagName, node: self)
}
private func findChildTag(tagName: String, node: HTMLNode?) -> HTMLNode? {
if let nd = node {
for curNode in nd {
if tagName == curNode.tagName {
return curNode
}
if let c = curNode.child {
if let n = findChildTag(tagName, node: c) {
return n
}
}
}
}
return nil
}
//------------------------------------------------------
public func findChildTagsAttr(tagName: String, attrName : String, attrValue : String) -> [HTMLNode] {
var nodes : [HTMLNode] = []
return findChildTagsAttr(tagName, attrName : attrName, attrValue : attrValue, node: self.child, retAry: &nodes)
}
private func findChildTagsAttr(tagName: String, attrName : String, attrValue : String, node: HTMLNode?, inout retAry: [HTMLNode] ) -> [HTMLNode] {
if let n = node {
for curNode in n {
if curNode.tagName == tagName && curNode.getAttributeNamed(attrName) == attrValue {
retAry.append(curNode)
}
findChildTagsAttr(tagName, attrName : attrName, attrValue : attrValue, node: curNode.child, retAry: &retAry)
}
}
return retAry
}
public func findChildTagAttr(tagName : String, attrName : String, attrValue : String) -> HTMLNode?
{
return findChildTagAttr(tagName, attrName : attrName, attrValue : attrValue, node: self)
}
private func findChildTagAttr(tagName : String, attrName : String, attrValue : String, node: HTMLNode?) -> HTMLNode?
{
if let nd = node {
for curNode in nd {
if tagName == curNode.tagName && curNode.getAttributeNamed(attrName) == attrValue {
return curNode
}
if let c = curNode.child {
if let n = findChildTagAttr(tagName,attrName: attrName,attrValue: attrValue, node: c) {
return n
}
}
}
}
return nil
}
/**
* Find node by id (id has to be used properly it is a uniq attribute)
* @param[in] id String
* @return HTMLNode
*/
public func findNodeById(id: String) -> HTMLNode? {
return findNodeById(id, node: self)
}
private func findNodeById(id: String, node: HTMLNode?) -> HTMLNode? {
if let nd = node {
for curNode in nd {
if id == curNode.getAttributeNamed("id") {
return curNode
}
if let c = curNode.child {
if let n = findNodeById(id, node: c) {
return n
}
}
}
}
return nil
}
/**
* xpathで子ノードを探す
* @param[in] xpath xpath
* @return 子ノード。見つからなければnil
*/
public func xpath(xpath: String) -> [HTMLNode]? {
let ctxt = xmlXPathNewContext(self.doc)
if ctxt == nil {
return nil
}
let result = xmlXPathEvalExpression(xpath, ctxt)
xmlXPathFreeContext(ctxt)
if result == nil {
return nil
}
let nodeSet = result.memory.nodesetval
if nodeSet == nil || nodeSet.memory.nodeNr == 0 || nodeSet.memory.nodeTab == nil {
return nil
}
var nodes : [HTMLNode] = []
let size = Int(nodeSet.memory.nodeNr)
for var i = 0; i < size; ++i {
let n = nodeSet.memory
let node = nodeSet.memory.nodeTab[i]
let htmlNode = HTMLNode(doc: self.doc, node: node)
nodes.append(htmlNode)
}
return nodes
}
}
extension HTMLNode : SequenceType {
public func generate() -> HTMLNodeGenerator {
return HTMLNodeGenerator(node: self)
}
}
/**
* HTMLNodeGenerator
*/
public class HTMLNodeGenerator : GeneratorType {
private var node : HTMLNode?
public init(node: HTMLNode?) {
self.node = node
}
public func next() -> HTMLNode? {
var temp = node
node = node?.next
return temp
}
}