Textractor/GUI/host/textthread.cc

// textthread.cc
// 8/24/2013 jichi
// Branch IHF/TextThread.cpp, rev 133

#include "textthread.h"
#include "host.h"
#include "const.h"
#include <regex>
#include <algorithm>

TextThread::TextThread(ThreadParam tp) : handle(threadCounter++), name(Host::GetHookName(tp.pid, tp.hook)), tp(tp), hp(Host::GetHookParam(tp)) {}

TextThread::~TextThread()
{
	SetEvent(deletionEvent);
	flushThread.join();
	CloseHandle(deletionEvent);
}

std::wstring TextThread::GetStorage()
{
	LOCK(threadMutex);
	return storage;
}

void TextThread::Flush()
{
	std::wstring sentence;
	{
		LOCK(threadMutex);
		if (buffer.empty()) return;
		if (buffer.size() < maxBufferSize && GetTickCount() - timestamp < flushDelay) return;
		sentence = buffer;
		buffer.clear();

		bool hasRepetition = false;
		for (std::wsmatch results; std::regex_search(sentence, results, std::wregex(L"([^\\x00]{6,})\\1\\1")); hasRepetition = true) sentence = results[1];
		if (hasRepetition) repeatingChars = std::unordered_set<wchar_t>(sentence.begin(), sentence.end());
		else repeatingChars.clear();
	}
	AddSentence(sentence);
}

void TextThread::AddSentence(std::wstring sentence)
{
	// Dispatch to extensions occurs here. Don't hold mutex! Extensions might take a while!
	if (Output(this, sentence))
	{
		LOCK(threadMutex);
		storage += sentence;
	}
}

void TextThread::AddText(const BYTE* data, int len)
{
	if (len < 0) return;
	LOCK(threadMutex);
	buffer += hp.type & USING_UNICODE
		? std::wstring((wchar_t*)data, len / 2)
		: StringToWideString(std::string((char*)data, len), hp.codepage);
	if (std::all_of(buffer.begin(), buffer.end(), [&](wchar_t c) { return repeatingChars.count(c) > 0; })) buffer.clear();
	timestamp = GetTickCount();
}

// EOF