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#include "XMLBuffer.h"
#include "XMLLexerTokens.h"
#include "macros.h"
wxStringSet_t XMLBuffer::m_emptyTags;
XMLBuffer::XMLBuffer(const wxString& buffer, bool htmlMode)
: m_buffer(buffer)
, m_state(kNormal)
, m_htmlMode(htmlMode)
{
m_scanner = ::xmlLexerNew(buffer);
}
XMLBuffer::~XMLBuffer()
{
if(m_scanner) {
::xmlLexerDestroy(&m_scanner);
}
}
void XMLBuffer::Parse()
{
m_elements.clear();
CHECK_PTR_RET(m_scanner);
XMLLexerToken token;
m_state = kNormal;
while(::xmlLexerNext(m_scanner, token)) {
switch(m_state) {
case kNormal: {
switch(token.type) {
case kXML_T_XML_OPEN_TAG:
m_state = kNonXmlSection;
break;
case kXML_T_CDATA_START:
m_state = kCdata;
break;
case kXML_T_COMMENT_START:
m_state = kComment;
break;
case '<':
// "<" was found
OnOpenTag();
break;
case '>':
// ">" was found. If in HTML mode and the current scope is an open tag
// pop it
OnCloseTag();
break;
case kXML_T_CLOSE_TAG_PREFIX:
// "</" was found
OnTagClosePrefix();
break;
case kXML_T_CLOSE_TAG_SUFFIX:
// "/>" closing tag was found
if(!m_elements.empty()) m_elements.pop_back();
break;
default:
break;
}
} break;
case kCdata: {
switch(token.type) {
case kXML_T_CDATA_END:
m_state = kNormal;
break;
default:
break;
}
} break;
case kComment: {
switch(token.type) {
case kXML_T_COMMENT_END:
m_state = kNormal;
break;
default:
break;
}
} break;
case kNonXmlSection: {
switch(token.type) {
case kXML_T_XML_CLOSE_TAG:
m_state = kNormal;
break;
default:
break;
}
} break;
}
}
}
void XMLBuffer::OnOpenTag()
{
XMLLexerToken token;
if(!::xmlLexerNext(m_scanner, token)) return;
if(token.type == kXML_T_IDENTIFIER) {
// in html mode and found an empty tag?
XMLBuffer::Scope scope;
scope.line = token.lineNumber;
scope.tag = token.text;
scope.isEmptyTag = (m_htmlMode && IsEmptyHtmlTag(token.text));
m_elements.push_back(scope);
}
}
void XMLBuffer::OnTagClosePrefix()
{
XMLLexerToken token;
if(!::xmlLexerNext(m_scanner, token)) return;
if(token.type == kXML_T_IDENTIFIER) {
if(!m_elements.empty()) {
m_elements.pop_back();
}
}
}
XMLBuffer::Scope XMLBuffer::GetCurrentScope() const
{
if(m_elements.empty()) return XMLBuffer::Scope();
return m_elements.back();
}
bool XMLBuffer::ConsumeUntil(int until)
{
XMLLexerToken token;
while(::xmlLexerNext(m_scanner, token)) {
if(token.type == until) return true;
}
return false;
}
bool XMLBuffer::IsEmptyHtmlTag(const wxString& tag)
{
if(m_emptyTags.empty()) {
m_emptyTags.insert("br");
m_emptyTags.insert("hr");
m_emptyTags.insert("meta");
m_emptyTags.insert("link");
m_emptyTags.insert("base");
m_emptyTags.insert("img");
m_emptyTags.insert("embed");
m_emptyTags.insert("param");
m_emptyTags.insert("area");
m_emptyTags.insert("col");
m_emptyTags.insert("input");
m_emptyTags.insert("isindex");
m_emptyTags.insert("basefont");
m_emptyTags.insert("!doctype");
}
wxString tagName = tag.Lower();
if(tagName.StartsWith("<")) {
tagName.Remove(0, 1);
}
return m_emptyTags.count(tagName);
}
void XMLBuffer::OnCloseTag()
{
if(!m_elements.empty()) {
XMLBuffer::Scope& curscope = m_elements.back();
if(curscope.isEmptyTag) {
m_elements.pop_back();
}
}
}
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