editbox.c File Reference

Editable text box widget. More...

#include <string.h>
#include <assert.h>
#include <gpxe/editbox.h>

Go to the source code of this file.

Defines
#define	EDITBOX_MIN_CHARS   3
Functions
	FILE_LICENCE (GPL2_OR_LATER)
void	init_editbox (struct edit_box *box, char *buf, size_t len, WINDOW *win, unsigned int row, unsigned int col, unsigned int width, unsigned int flags)
	Initialise text box widget.
void	draw_editbox (struct edit_box *box)
	Draw text box widget.

---

Detailed Description

Editable text box widget.

Definition in file editbox.c.

---

Define Documentation

#define EDITBOX_MIN_CHARS   3

Definition at line 31 of file editbox.c.

Referenced by draw_editbox().

---

Function Documentation

FILE_LICENCE

(

GPL2_OR_LATER

)

void init_editbox	(	struct edit_box *	box,
		char *	buf,
		size_t	len,
		WINDOW *	win,
		unsigned int	row,
		unsigned int	col,
		unsigned int	width,
		unsigned int	flags
	)

Initialise text box widget.

Parameters:

	box	Editable text box widget
	buf	Text buffer
	len	Size of text buffer
	win	Containing window
	row	Row
	col	Starting column
	width	Width
	flags	Flags

Definition at line 45 of file editbox.c.

References edit_string::buf, edit_box::col, edit_string::cursor, edit_box::flags, edit_string::len, memset(), edit_box::row, stdscr, edit_box::string, strlen(), edit_box::width, and edit_box::win.

Referenced by load_setting(), and login_ui().

                                                             {
        memset ( box, 0, sizeof ( *box ) );
        box->string.buf = buf;
        box->string.len = len;
        box->string.cursor = strlen ( buf );
        box->win = ( win ? win : stdscr );
        box->row = row;
        box->col = col;
        box->width = width;
        box->flags = flags;
}

void draw_editbox

(

struct edit_box *

box

)

Draw text box widget.

Parameters:

box

Editable text box widget

Definition at line 65 of file editbox.c.

References edit_string::buf, edit_box::col, edit_string::cursor, EDITBOX_MIN_CHARS, EDITBOX_STARS, edit_box::first, edit_box::flags, memcpy, memset(), mvwprintw, edit_box::row, stdscr, edit_box::string, strlen(), edit_box::width, edit_box::win, and wmove().

Referenced by draw_setting(), and login_ui().

                                           {
        size_t width = box->width;
        char buf[ width + 1 ];
        signed int cursor_offset, underflow, overflow, first;
        size_t len;

        /* Adjust starting offset so that cursor remains within box */
        cursor_offset = ( box->string.cursor - box->first );
        underflow = ( EDITBOX_MIN_CHARS - cursor_offset );
        overflow = ( cursor_offset - ( width - 1 ) );
        first = box->first;
        if ( underflow > 0 ) {
                first -= underflow;
                if ( first < 0 )
                        first = 0;
        } else if ( overflow > 0 ) {
                first += overflow;
        }
        box->first = first;
        cursor_offset = ( box->string.cursor - first );

        /* Construct underscore-padded string portion */
        memset ( buf, '_', width );
        buf[width] = '\0';
        len = ( strlen ( box->string.buf ) - first );
        if ( len > width )
                len = width;
        if ( box->flags & EDITBOX_STARS ) {
                memset ( buf, '*', len );
        } else {
                memcpy ( buf, ( box->string.buf + first ), len );
        }

        /* Print box content and move cursor */
        if ( ! box->win )
                box->win = stdscr;
        mvwprintw ( box->win, box->row, box->col, "%s", buf );
        wmove ( box->win, box->row, ( box->col + cursor_offset ) );
}