How to remove contents between all occurance of certain html tag?

[sophvic]

Hi,

I am trying to remove content between <div>content</div> using QRegularExpression. When the tag occurs once, it works fine. However, when it occurs more than once, it fails.

For example

QString str( "This is a <div style='color:red;'>test</div> to remove all <div>divs</div> from html string" );

I want to remove all content between "div" tag to produce following new string

"This is a to remove all from html string".

QRegularExpression rx( "<(div)[^>]*>.*</div>", QRegularExpression::CaseInsensitiveOption ) produce new string below

"This is a from html string"

I can not use xml parser as the html may not be well formed.

Many thanks.

[sophvic]

Figure out myself, which also works when a tag includes another tag. Need to run multiple passes if you want to remove content in diferent tags in one go.

void removeAllBetweenHtmlTag( QString& content, const QStringList& tagList )
{
  QString tagStr = QString( "(<\\b(%1)\\b[^>]*>[^<]+</\\b(%1)\\b>)" ).
    arg( tagList.join( "|" ) );
 
  QRegularExpression rx( tagStr, QRegularExpression::CaseInsensitiveOption );
 
   while( true ) {
    int len1 = content.length();
    content.replace( rx, " " );
    qDebug() << content;
    int len2 = content.length();
    if ( len1 == len2 ) {
      break;
    }
  }
 
} 
 
int main( int, char** argv )
{
  qDebug() << "";
 
  QString str1( "This is a <div style='color:red;'>test</div> to <span>remove</span> all <div>divs containing <span>spans</span></div> from html string" );
  qDebug() << str1;
  removeAllBetweenHtmlTag( str1, QStringList() << "div" << "span" );
  qDebug() << str1;
 
  qDebug() << "";
}

void removeAllBetweenHtmlTag( QString& content, const QStringList& tagList )
{
  QString tagStr = QString( "(<\\b(%1)\\b[^>]*>[^<]+</\\b(%1)\\b>)" ).
    arg( tagList.join( "|" ) );

  QRegularExpression rx( tagStr, QRegularExpression::CaseInsensitiveOption );

   while( true ) {
    int len1 = content.length();
    content.replace( rx, " " );
    qDebug() << content;
    int len2 = content.length();
    if ( len1 == len2 ) {
      break;
    }
  }

} 

int main( int, char** argv )
{
  qDebug() << "";

  QString str1( "This is a <div style='color:red;'>test</div> to <span>remove</span> all <div>divs containing <span>spans</span></div> from html string" );
  qDebug() << str1;
  removeAllBetweenHtmlTag( str1, QStringList() << "div" << "span" );
  qDebug() << str1;

  qDebug() << "";
}

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