/*
    Header file that allows:
        --> drawing certain UI elements within the terminal such as colored boxes
        --> moving the cursor within the terminal
        --> getting the width and height of the terminal in Lines and Columns
        --> clearing the screen

    Author: Chirculete Vlad Mihai
    Date (created): 12.10.2016
    Date (last edit): 19.11.2016
*/#include <stdio.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <string.h>// text colors
#define NRM  "\x1B[0m"
#define BLK  "\x1B[30m"
#define RED  "\x1B[31m"
#define GRN  "\x1B[32m"
#define YEL  "\x1B[33m"
#define BLU  "\x1B[34m"
#define MAG  "\x1B[35m"
#define CYN  "\x1B[36m"
#define WHT  "\x1B[37m"// background colors
#define BGBLK  "\x1B[40m"
#define BGRED  "\x1B[41m"
#define BGGRN  "\x1B[42m"
#define BGYEL  "\x1B[43m"
#define BGBLU  "\x1B[44m"
#define BGMAG  "\x1B[45m"
#define BGCYN  "\x1B[46m"
#define BGWHT  "\x1B[47m"// other text attributes
#define BOLD_ON "\x1b[1m"      // Bold on(enable foreground intensity)
#define UNDERLINE_ON "\x1b[4m"     // Underline on
#define BLINK_ON "\x1b[5m"         // Blink on(enable background intensity)
#define BOLD_OFF "\x1b[21m"        // Bold off(disable foreground intensity)
#define UNDERLINE_OFF "\x1b[24m" //   Underline off
#define BLINK_OFF "\x1b[25m"   // Blink off(disable background intensity)typedef struct window window;struct window
{int id;                // the id of the windowchar *title;     // the title of the windowchar *titleColor; // color of the window's titleint x, y;            // x and y coordinates of the top left corner of the windowint width, height;   // the width and the height of the windowint drawBorder;        // 1 or 0, enables/disables drawing of the border and titlechar *borderColor;   // color of the window's borderint drawBackground;     // 1 or 0, enables/disables drawing of the window background char *backgroundColor; // background color of the box
};// sets the window's title and enables border drawing
void setWindowTitle(window *w, char *title, char *title_color)
{(*w).title = title;(*w).titleColor = title_color;(*w).drawBorder = 1;
}// sets the window's border color and enables border drawing
void setWindowBorderColor(window *w, char *color)
{(*w).borderColor = color;(*w).drawBorder = 1;
}// moves the cursor to X and Y in terminal
void gotoxy(int x,int y)
{printf("%c[%d;%df",0x1B,y,x);
}// get the terminal height in lines
int getTermHeight()
{// get the terminal height in linesint lines = 0;#ifdef TIOCGSIZEstruct ttysize ts;ioctl(STDIN_FILENO, TIOCGSIZE, &ts);lines = ts.ts_lines;#elif defined(TIOCGWINSZ)struct winsize ts;ioctl(STDIN_FILENO, TIOCGWINSZ, &ts);lines = ts.ws_row;#endif /* TIOCGSIZE */return lines;
}int getTermWidth()
{// get the terminal width in columnsint cols = 0;#ifdef TIOCGSIZEstruct ttysize ts;ioctl(STDIN_FILENO, TIOCGSIZE, &ts);cols = ts.ts_cols;#elif defined(TIOCGWINSZ)struct winsize ts;ioctl(STDIN_FILENO, TIOCGWINSZ, &ts);cols = ts.ws_col;#endif /* TIOCGSIZE */return cols;
}// draws a filled bar and then moves the cursor to the top of the terminal
void drawBar(int x, int y, int width, int height, char *color)
{width--;height--;int i, j=x;gotoxy(x, y);for(i=y; i<=y+height; i++){gotoxy(x, i);j=x;while(j<=x+width){printf("%s ", color);  j++;}}printf("%s", NRM);gotoxy(0, 0);
}// draws a box (different from a bar since it has no filling)  then moves the cursor to the top of the terminal
void drawBox(int x, int y, int width, int height, char *color)
{width--;height--;int i, j=x;gotoxy(x, y);for(i=y; i<=y+height; i++){gotoxy(x, i);j=x;while(j<=x+width){if(j==x || j==x+width || i==y || i == y+height) printf("%s ", color);    else printf("%s ", NRM);j++;}//printf("%s\n", NRM);}printf("%s", NRM);gotoxy(0, 0);
}// prints text at X and Y then moves the cursor to the top of the terminal
void textXY(char* text, int x, int y)
{gotoxy(x, y);printf("%s", text);gotoxy(0, 0);
}// prints colored text at X and Y then moves the cursor to the top of the terminal
void textXYcolor(char* text, int x, int y, char* text_color, char* text_bg)
{gotoxy(x, y);printf("%s%s%s%s", text_color, text_bg, text, NRM);gotoxy(0, 0);
}// sets the current text color to TEXT_COLOR
void setTextColor(char* text_color)
{printf("%s", text_color);
}// sets the current text background to TEXT_BG
void setTextBackground(char* text_bg)
{printf("%s", text_bg);
}// sets text attributes
void setTextAttr(char* text_attr)
{printf("%s", text_attr);
}// clear the screen
void clearscr()
{system("clear");
}// draw a given window
void drawWindow(window w)
{int titlePosition; // position on X axis where to start drawing the texttitlePosition = (w.width / 2) - (strlen(w.title) / 2);// if border drawing is set to true (1), draw the border and the titleif(w.drawBorder){drawBox(w.x, w.y, w.width, w.height, w.borderColor);// set the bold and underline attributes to ON for title then switch it back offsetTextAttr(BOLD_ON);    setTextAttr(UNDERLINE_ON);textXYcolor(w.title, w.x + titlePosition, w.y, w.titleColor, w.borderColor);setTextAttr(BOLD_OFF);   setTextAttr(UNDERLINE_OFF);}// if background drawing is set to true (1), draw the backgroundif(w.drawBackground){drawBar(w.x+1, w.y+1, w.width-1, w.height-1, w.backgroundColor);}
}// draw a given array of windows
void drawWindows(window windows[], int n)
{int i;for(i=0; i<n; i++)drawWindow(windows[i]);
}

#include <stdlib.h>
#include <stdio.h>
#include "termgfx.h"void drawBar();int main(int argc, char **argv)
{system("clear");window w[10];// window 0w[0].title = "Window 0";w[0].drawBorder = 1;w[0].titleColor = WHT;w[0].borderColor = BGBLU;w[0].drawBackground = 0;w[0].backgroundColor = BGWHT;w[0].x = 0;w[0].y = 5;w[0].width = (getTermWidth()/2)-1;w[0].height = getTermHeight()-3;// window 1w[1].title = "Window 1";w[1].drawBorder = 1;w[1].titleColor = YEL;w[1].borderColor = BGGRN;w[1].drawBackground = 1;w[1].backgroundColor = BGWHT;w[1].x = getTermWidth()/2;w[1].y = 5;w[1].width = getTermWidth()/3;w[1].height = getTermHeight()/3;// window 2w[2].title = "Window 2";w[2].drawBorder = 1;w[2].titleColor = GRN;w[2].borderColor = BGYEL;w[2].drawBackground = 0;w[2].backgroundColor = BGWHT;w[2].x = getTermWidth()/2;w[2].y = getTermHeight()/2;w[2].width = getTermWidth()/2;w[2].height = getTermHeight()/2;drawWindows(w, 3);return 0;
}