Streaming Filtered Text

Sometimes, you might want to get filtered text in small chunks instead of all at once. This approach has the following advantages:

  • You can process the output data in parallel with filtering the rest of the text. Parallel processing can minimize the time it takes to filter and process the text.
  • You can choose to stop filtering when the application has all the text it needs, which can save valuable resources. This approach is called partial filtering.

You can use the text method on a Document object to obtain a std::istream, from which you can stream filtered text. KeyView only processes as much of the document as it needs to output the text you read. For example:

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for(std::string line; std::getline(doc.text(), line);)
{
    doSomething(line);
}