finalcut/examples/opti-move.cpp

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/***********************************************************************
* opti-move.cpp - Tests the cursor movement optimization *
* *
* This file is part of the FINAL CUT widget toolkit *
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* *
* Copyright 2016-2020 Markus Gans *
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* *
* FINAL CUT is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 3 of *
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* the License, or (at your option) any later version. *
* *
* FINAL CUT is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
***********************************************************************/
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#include <array>
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#include <iomanip>
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#include <memory>
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#include <string>
#include <final/final.h>
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// Global FApplication object
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static finalcut::FApplication* app{nullptr};
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// function prototype
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bool keyPressed();
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void term_boundaries (int&, int&);
void move (int, int, int, int);
//----------------------------------------------------------------------
// functions
//----------------------------------------------------------------------
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bool keyPressed()
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{
// Waiting for keypress
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struct termios save{};
bool ret{false};
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std::cout << "\nPress any key to continue...";
fflush(stdout);
tcgetattr (STDIN_FILENO, &save);
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struct termios t = save;
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t.c_lflag &= uInt(~(ICANON | ECHO));
tcsetattr (STDIN_FILENO, TCSANOW, &t);
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if ( std::getchar() != EOF )
ret = true;
else
ret = false;
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tcsetattr (STDIN_FILENO, TCSADRAIN, &save);
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return ret;
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}
//----------------------------------------------------------------------
void term_boundaries (int& x, int& y)
{
// checks and corrects the terminal boundaries
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const auto term_width = int(app->getDesktopWidth());
const auto term_height = int(app->getDesktopHeight());
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if ( x < 0 )
x = 0;
if ( y < 0 )
y = 0;
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if ( x >= term_width && term_width > 0 )
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{
y += x / term_width;
x %= term_width;
}
if ( y >= term_height )
y = term_height - 1;
}
//----------------------------------------------------------------------
void move (int xold, int yold, int xnew, int ynew)
{
// Prints the cursor move escape sequence
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finalcut::FString buffer{};
finalcut::FString sequence{};
finalcut::FString from{};
finalcut::FString to{};
finalcut::FString byte{};
constexpr std::array<const char*, 33> ctrl_character =
{{
"NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL",
"BS", "Tab", "LF", "VT", "FF", "CR", "SO", "SI",
"DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB",
"CAN", "EM", "SUB", "Esc", "FS", "GS", "RS", "US",
"Space"
}};
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term_boundaries(xold, yold);
term_boundaries(xnew, ynew);
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// Get the move string
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buffer = finalcut::FTerm::moveCursorString (xold, yold, xnew, ynew);
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for (auto&& ch : buffer)
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{
if ( ch < 0x21 )
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sequence += ctrl_character[std::size_t(ch)];
else
sequence += ch;
sequence += ' ';
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}
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from.sprintf ("(%3d;%3d)", xold, yold);
to.sprintf ("(%3d;%3d)", xnew, ynew);
const std::size_t len = buffer.getLength();
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if ( len <= 1 )
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byte.sprintf ("%d byte ", len);
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else
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byte.sprintf ("%d bytes", len);
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std::cout << std::right << std::setw(10) << from << " -> "
<< std::left << std::setw(10) << to << " "
<< std::setw(21) << sequence << " "
<< std::right << std::setw(10) << byte << "\r\n";
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}
//----------------------------------------------------------------------
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class DirectLogger final : public finalcut::FLog
{
public:
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// Constructor
DirectLogger();
// Destructor
~DirectLogger() override;
void info (const std::string& entry) override
{
output << entry << "\r" << std::endl;
}
void warn (const std::string&) override
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{
// An implementation is not required in this context
}
void error (const std::string&) override
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{
// An implementation is not required in this context
}
void debug (const std::string&) override
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{
// An implementation is not required in this context
}
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void flush() override
{
output.flush();
}
void setOutputStream (const std::ostream& os) override
{ output.rdbuf(os.rdbuf()); }
void setLineEnding (LineEnding) override
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{
// An implementation is not required in this context
}
void enableTimestamp() override
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{
// An implementation is not required in this context
}
void disableTimestamp() override
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{
// An implementation is not required in this context
}
private:
// Data member
std::ostream output{std::cerr.rdbuf()};
};
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//----------------------------------------------------------------------
DirectLogger::DirectLogger() // constructor
{ }
//----------------------------------------------------------------------
DirectLogger::~DirectLogger() // destructor
{ }
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//----------------------------------------------------------------------
// main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
// Disable mouse, color palette changes and terminal data requests
auto& start_options = finalcut::FStartOptions::getFStartOptions();
start_options.mouse_support = false;
start_options.color_change = false;
start_options.terminal_data_request = false;
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// Create the application object
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finalcut::FApplication term_app{argc, argv};
// Force terminal initialization without calling show()
term_app.initTerminal();
if ( finalcut::FApplication::isQuit() )
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return 0;
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// Pointer to the global virtual terminal object
app = &term_app;
// Get screen dimension
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auto xmax = int(term_app.getDesktopWidth() - 1);
auto ymax = int(term_app.getDesktopHeight() - 1);
finalcut::FString line{std::size_t(xmax) + 1, '-'};
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// Place the cursor in the upper left corner
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term_app.setTermXY(0, 0);
// Reset all terminal attributes
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term_app.setNormal();
// Clear the screen
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term_app.clearArea();
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// Show the determined terminal name and text resolution
std::cout << "Terminal: " << finalcut::FTerm::getTermType() << "\r\n";
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std::cout << " Columns: 0.." << xmax << "\r\n";
std::cout << " Lines: 0.." << ymax << "\r\n";
// Show the escape sequences for the following cursor movements
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std::cout << std::setw(38) << "Cursor move\r\n";
std::cout << " (From) -> (To) ";
std::cout << "escape sequence ";
std::cout << "Length\r\n";
std::cout << line;
move (5, 12, 0, 0);
move (5, ymax, 5, 0);
move (xmax, 1, 0, 1);
move (xmax, 1, 0, 2);
move (xmax + 1, 1, 0, 2);
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move (9, 4, 10, 4);
move (10, 4, 9, 4);
move (9, 4, 11, 4);
move (11, 4, 9, 4);
move (1, 0, 8, 0);
move (16, 0, 16, 1);
move (16, 1, 16, 0);
move (16, 0, 16, 2);
move (16, 2, 16, 0);
move (3, 2, xmax, 2);
move (5, 5, xmax - 5, ymax - 5);
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// Waiting for keypress
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keyPressed();
// Show terminal speed and milliseconds for all cursor movement sequence
std::cout << "\r" << line << std::flush;
// Generation of a logger in a shared_ptr via a pointer
finalcut::FApplication::setLog(std::make_shared<DirectLogger>());
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const finalcut::FOptiMove& opti_move = *finalcut::FTerm::getFOptiMove();
finalcut::printDurations(opti_move);
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// Waiting for keypress
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keyPressed();
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app = nullptr; // End of term_app object scope
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return 0;
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}