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 *
* *
* Copyright 2016-2018 Markus Gans *
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* *
* The 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 *
* the License, or (at your option) any later version. *
* *
* The Final Cut is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* 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 <iomanip>
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#include <string>
#include <final/final.h>
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// Global FVTerm object
static finalcut::FVTerm* terminal;
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// Global FApplication object
static finalcut::FApplication* app;
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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
struct termios save, t;
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bool ret;
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std::cout << "\nPress any key to continue...";
fflush(stdout);
tcgetattr (STDIN_FILENO, &save);
t = save;
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
int term_width = int(app->getDesktopWidth());
int 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
std::string sequence;
char* buffer;
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char from[26], to[26], byte[20];
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uInt len;
const std::string 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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snprintf (from, sizeof(from), "(%3d;%3d)", xold, yold);
snprintf (to, sizeof(to), "(%3d;%3d)", xnew, ynew);
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std::cout << std::right << std::setw(10) << from
<< " -> "
<< std::left << std::setw(10) << to
<< " ";
// get the move string
buffer = terminal->moveCursor (xold, yold, xnew, ynew);
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len = uInt(std::strlen(buffer));
for (uInt i = 0; i < len; i++)
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{
char ch = buffer[i];
if ( ch < 0x21 )
sequence += ctrl_character[uInt(ch)];
else
sequence += ch;
sequence += ' ';
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}
std::cout << std::setw(21) << sequence << " ";
if ( len <= 1 )
snprintf (byte, sizeof(byte), "%d byte ", len);
else
snprintf (byte, sizeof(byte), "%d bytes", len);
std::cout << std::right << std::setw(10) << byte << "\r\n";
}
//----------------------------------------------------------------------
// main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
int xmax, ymax;
// Create the application object
finalcut::FApplication TermApp(argc, argv);
// Pointer to the global virtual terminal object
terminal = static_cast<finalcut::FVTerm*>(&TermApp);
app = &TermApp;
// Get screen dimension
xmax = int(TermApp.getDesktopWidth() - 1);
ymax = int(TermApp.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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TermApp.setTermXY(0, 0);
// Reset all terminal attributes
TermApp.setNormal();
// Clear the screen
TermApp.clearArea();
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// Show the determined terminal name and text resolution
std::cout << "Terminal: " << TermApp.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
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std::cout << "\r" << line;
TermApp.printMoveDurations();
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// Waiting for keypress
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keyPressed();
app = 0; // End of TermApp object scope
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}