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// Copyright (c) 2011-2016 Ryan Prichard
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
#ifndef AGENT_SCRAPER_H
#define AGENT_SCRAPER_H
#include <windows.h>
#include <stdint.h>
#include <memory>
#include <vector>
#include "ConsoleLine.h"
#include "Coord.h"
#include "LargeConsoleRead.h"
#include "SmallRect.h"
#include "Terminal.h"
class ConsoleScreenBufferInfo;
class Win32Console;
class Win32ConsoleBuffer;
// We must be able to issue a single ReadConsoleOutputW call of
// MAX_CONSOLE_WIDTH characters, and a single read of approximately several
// hundred fewer characters than BUFFER_LINE_COUNT.
const int BUFFER_LINE_COUNT = 3000;
const int MAX_CONSOLE_WIDTH = 2500;
const int MAX_CONSOLE_HEIGHT = 2000;
const int SYNC_MARKER_LEN = 16;
const int SYNC_MARKER_MARGIN = 200;
class Scraper {
public:
Scraper(
Win32Console &console,
Win32ConsoleBuffer &buffer,
std::unique_ptr<Terminal> terminal,
Coord initialSize);
~Scraper();
void resizeWindow(Win32ConsoleBuffer &buffer,
Coord newSize,
ConsoleScreenBufferInfo &finalInfoOut);
void scrapeBuffer(Win32ConsoleBuffer &buffer,
ConsoleScreenBufferInfo &finalInfoOut);
Terminal &terminal() { return *m_terminal; }
private:
void resetConsoleTracking(
Terminal::SendClearFlag sendClear, int64_t scrapedLineCount);
void markEntireWindowDirty(const SmallRect &windowRect);
void scanForDirtyLines(const SmallRect &windowRect);
void clearBufferLines(int firstRow, int count);
void resizeImpl(const ConsoleScreenBufferInfo &origInfo);
void syncConsoleContentAndSize(bool forceResize,
ConsoleScreenBufferInfo &finalInfoOut);
WORD attributesMask();
void directScrapeOutput(const ConsoleScreenBufferInfo &info,
bool consoleCursorVisible);
bool scrollingScrapeOutput(const ConsoleScreenBufferInfo &info,
bool consoleCursorVisible,
bool tentative);
void syncMarkerText(CHAR_INFO (&output)[SYNC_MARKER_LEN]);
int findSyncMarker();
void createSyncMarker(int row);
private:
Win32Console &m_console;
Win32ConsoleBuffer *m_consoleBuffer = nullptr;
std::unique_ptr<Terminal> m_terminal;
int m_syncRow = -1;
unsigned int m_syncCounter = 0;
bool m_directMode = false;
Coord m_ptySize;
int64_t m_scrapedLineCount = 0;
int64_t m_scrolledCount = 0;
int64_t m_maxBufferedLine = -1;
LargeConsoleReadBuffer m_readBuffer;
std::vector<ConsoleLine> m_bufferData;
int m_dirtyWindowTop = -1;
int m_dirtyLineCount = 0;
};
#endif // AGENT_SCRAPER_H
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