Some Improvements on Adblocker

[Philipp Hülsdunk]

I have made the concept:

QString filterBuffer;
vector <int> foundFilter;

void KHTMLPart::write( const QString &str )
{
  if ( str.isNull() )
    return;

// BEGIN OF AD FILTER //

    /*
    Firstly, we will remove all ads found in str
    */
    /*TODO
    for all filters do
        find and replace in str the ad for the filter
    */
    /*
    Now, we will ad str to our buffer
    */
    filterBuffer += str;
    /*
    In foundFilter we now what filters did match partly an end part of the 
last filterBuffer
    We will now search and replace with that filters
    */
    /*TODO
    for all filter with the id in found filter do
        find and replace the ad for the filter
    */
    /*
    Now we will find the filters which match partly an end of filterBuffer
    We will store this filters id's in foundFilter
    So we will clear found filter
    */
    foundFilter.clear();
    /*
    And search for those filters
    */
    /* TODO
    for all substrings [i,end) of filterBuffer do
        for all filters do
            if a filter matches a part of the substring then
                add the filter-id to foundFilter
    */
    /*
    If we have not found such a filter,
        filterBuffer is ad free and we will write it to khtml
    else, filterBuffer contains a part of an ad at the end of filterBuffer.
    So, we have to wait for the next string written to khtmlpart
    */
    if ( foundFilter.size() != 0 ) then {
        return;
    } else {
        str = filterBuffer;
        filterBuffer = "";
    }

// END OF AD FILTER

  if(d->m_bFirstData) {
      // determine the parse mode
      d->m_doc->setParseMode( DocumentImpl::Strict );
      d->m_bFirstData = false;
  }
  khtml::Tokenizer* t = d->m_doc->tokenizer();
  if(t)
    t->write( str, true );
}

If we call khtmlpart::end() we should search filterBuffer for ads and then 
call

if ( !filterBuffer.isNull() ) {

if(d->m_bFirstData) {
      // determine the parse mode
      d->m_doc->setParseMode( DocumentImpl::Strict );
      d->m_bFirstData = false;
  }
khtml::Tokenizer* t = d->m_doc->tokenizer();
if(t)
    t->write( filterBuffer, true );

}

if we call khtmlpart::begin() we should clear foundFilter ad set filterBuffer 
to "".

		
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