/*
* Instantiates a new pointer to the CharBuffer.
*/
CharBuffer* Char_New()
{
CharBuffer* this = NULL;
this = (CharBuffer *)malloc(sizeof(CharBuffer));
// Initialize Char Buffer
this->char_buffer = Char_openDevice(CHAR_BUFFER_NAME); //**Couldn't find the constant in system.h
Char_init(this->char_buffer);
return this;
}
static inline void do_layout(VisualRow *vrow, VTLayout *vtlayout)
{
#define SIZE 4096
size_t logical_char2cell_index[SIZE];
size_t in2out[SIZE];
size_t out2in[SIZE];
char logical[SIZE]; /* is this enough? */
int logical_width, logical_length;
char visual[SIZE]; /* is this enough? */
size_t visual_length = SIZE;
wchar_t wc;
mbstate_t ps;
size_t mb_len;
int consumed = 0;
int cursor_pos = 0;
int current_char = 0;
int width;
int logical_cell_index;
Char mbchar;
memset(logical_char2cell_index,0,SIZE);
memset(logical,0,SIZE);
memset(visual,0,SIZE);
memset(in2out,0,SIZE);
memset(out2in,0,SIZE);
memset(&ps,0,sizeof(ps));
construct_char2cell_index(vrow->row,logical_char2cell_index);
Row_compose_bytes(vrow->row,
0,vrow->row->num_columns,
logical,SIZE,
&logical_length,&logical_width,1);
#undef SIZE
#if debug
printf("logical: [%s]\n",logical);
printf("logical_length = %u\n",logical_length);
#endif
vtlayout->transform(vtlayout,
logical, logical_length,
visual, &visual_length,
in2out,out2in,NULL);
#if debug
printf("visual : [%s]\n",visual);
printf("visual_length = %u\n\n",visual_length);
#endif
/* Well off course, I need to refine this code ;-) */
while(consumed < visual_length)
{
mb_len = mbrtowc(&wc,visual+consumed,visual_length-consumed,&ps);
if(mb_len == 0 || mb_len == (size_t)-1 || mb_len == (size_t)-2 )
{
#if debug
printf("found invalid or NULL character(%u)\n",mb_len);
#endif
break;
}
else
{
logical_cell_index = logical_char2cell_index[out2in[current_char]];
#if debug
printf("logical char index[%d] <-> visual char index[%d]\n",
out2in[current_char],current_char);
#endif
if(Row_is_char_drawn(vrow->row,logical_cell_index))
{
width = wcwidth(wc);
Char_init(mbchar,visual+consumed,mb_len,width,(width>0));
Row_add_char(vrow->vrow,
cursor_pos,
&mbchar,
Row_is_bold(vrow->row,logical_cell_index),
Row_is_blink(vrow->row,logical_cell_index),
Row_is_inverse(vrow->row,logical_cell_index),
Row_is_underline(vrow->row,logical_cell_index),
Row_get_foreground(vrow->row,logical_cell_index),
Row_get_background(vrow->row,logical_cell_index),
Row_get_charset(vrow->row,logical_cell_index));
}
else
{
Row_set_char_drawn(vrow->vrow,cursor_pos,0);
width = 1;
}
vrow->visual2logical_index[cursor_pos] = logical_cell_index;
vrow->logical2visual_index[logical_cell_index] = cursor_pos;
#if debug
printf("logical cell index[%d] <-> visual cell index[%d]\n",
logical_cell_index,cursor_pos);
#endif
}
/* process for multi column character */
if(width > 1 && Row_is_char_drawn(vrow->row,logical_cell_index) &&
width == Row_get_cell_width(vrow->row,logical_cell_index) )
{
int i;
for(i=1;i<width;i++)
{
vrow->visual2logical_index[cursor_pos+i] = logical_cell_index+i;
vrow->logical2visual_index[logical_cell_index+i] = cursor_pos+i;
}
}
cursor_pos+=width;
current_char++;
consumed+=mb_len;
}
/* The visual row possibly has ligatures */
if(cursor_pos < vrow->row->num_columns &&
!vtlayout->is_direction_LTR(vtlayout))
Row_insert_cells(vrow->vrow,0,vrow->row->num_columns-cursor_pos);
}