void debug_view_textbuf::view_update()
{
// update the console info
m_total.x = text_buffer_max_width(&m_textbuf);
m_total.y = text_buffer_num_lines(&m_textbuf);
if (m_total.x < 80)
m_total.x = 80;
// determine the starting sequence number
UINT32 curseq = 0;
if (!m_at_bottom)
{
curseq = m_topseq;
if (!text_buffer_get_seqnum_line(&m_textbuf, curseq))
m_at_bottom = true;
}
if (m_at_bottom)
{
curseq = text_buffer_line_index_to_seqnum(&m_textbuf, m_total.y - 1);
if (m_total.y < m_visible.y)
curseq -= m_total.y - 1;
else
curseq -= m_visible.y - 1;
}
m_topleft.y = curseq - text_buffer_line_index_to_seqnum(&m_textbuf, 0);
// loop over visible rows
debug_view_char *dest = m_viewdata;
for (UINT32 row = 0; row < m_visible.y; row++)
{
const char *line = text_buffer_get_seqnum_line(&m_textbuf, curseq++);
UINT32 col = 0;
// if this visible row is valid, add it to the buffer
if (line != NULL)
{
size_t len = strlen(line);
UINT32 effcol = m_topleft.x;
// copy data
while (col < m_visible.x && effcol < len)
{
dest->byte = line[effcol++];
dest->attrib = DCA_NORMAL;
dest++;
col++;
}
}
// fill the rest with blanks
while (col < m_visible.x)
{
dest->byte = ' ';
dest->attrib = DCA_NORMAL;
dest++;
col++;
}
}
}
const char *text_buffer_get_seqnum_line(text_buffer *text, UINT32 seqnum)
{
UINT32 numlines = text_buffer_num_lines(text);
UINT32 index = seqnum - text->linestartseq;
if (index >= numlines)
return nullptr;
return &text->buffer[text->lineoffs[(text->linestart + index) % text->linesize]];
}
