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#include <Library/UefiLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include "input.h"
struct widget_input *input_alloc(struct screen *scr, INT32 x, INT32 y,
INT32 width, INT32 attr, CONST CHAR16 *def_text)
{
struct widget_input *in;
UINTN text_length;
ASSERT(scr != NULL);
in = AllocateZeroPool(sizeof(struct widget_input));
if(!in)
return NULL;
in->win = newwin(scr, width, 1, x, y);
if(!in->win) {
input_release(in);
return NULL;
}
wattrset(in->win, attr);
whline(in->win, 0, 0, 0, attr, 0);
mvwprintf(in->win, 0, 0, def_text);
text_length = StrLen(def_text);
in->point = text_length > width ? width : text_length;
in->max_size = width;
in->buf_len = in->point;
in->buffer = AllocateCopyPool((in->max_size + 1) * sizeof(CHAR16), def_text);
if(!in->buffer) {
input_release(in);
return NULL;
}
return in;
}
VOID input_release(struct widget_input *in)
{
ASSERT(in != NULL);
if(in->win)
delwin(in->win);
if(in->buffer)
FreePool(in->buffer);
FreePool(in);
}
VOID input_set_point(struct widget_input *in, INTN pos)
{
in->point = pos;
if(pos < 0)
in->point = 0;
else if(pos > in->buf_len)
in->point = in->buf_len;
wmove(in->win, in->point, 0);
input_update(in);
}
VOID input_handle_char(struct widget_input *in, EFI_INPUT_KEY key)
{
UINTN i;
if(key.ScanCode == SCAN_LEFT)
input_set_point(in, in->point - 1);
else if(key.ScanCode == SCAN_RIGHT)
input_set_point(in, in->point + 1);
else {
switch(key.UnicodeChar) {
case 0x0:
break;
case CHAR_BACKSPACE: {
if(in->buf_len == 0 || in->point == 0)
break;
for(i = in->point; i < in->buf_len; i++)
in->buffer[i - 1] = in->buffer[i];
in->buffer[i - 1] = CHAR_NULL;
mvwaddch(in->win, i - 1, 0, L' ', -1);
mvwprintf(in->win, in->point - 1, 0, in->buffer + in->point - 1);
in->buf_len--;
input_set_point(in, in->point - 1);
}
case CHAR_TAB:
case CHAR_LINEFEED:
case CHAR_CARRIAGE_RETURN:
break;
default: {
if(in->buf_len >= (in->max_size-1))
break;
for(i = in->max_size-1; i > in->point; i--)
in->buffer[i] = in->buffer[i - 1];
in->buffer[in->point] = key.UnicodeChar;
wprintf(in->win, in->buffer + in->point);
in->buf_len++;
input_set_point(in, in->point + 1);
}
}
}
}
VOID input_update(struct widget_input *in)
{
wrefresh(in->win);
}
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