/* this scrolls the text so that cursor is on the screen */
void edit_scroll_screen_over_cursor (WEdit * edit)
{
int p;
int outby;
int b_extreme, t_extreme, l_extreme, r_extreme;
if (edit->num_widget_lines <= 0 || edit->num_widget_columns <= 0)
return;
r_extreme = EDIT_RIGHT_EXTREME;
l_extreme = EDIT_LEFT_EXTREME;
b_extreme = EDIT_BOTTOM_EXTREME;
t_extreme = EDIT_TOP_EXTREME;
if (edit->found_len) {
b_extreme = max (edit->num_widget_lines / 4, b_extreme);
t_extreme = max (edit->num_widget_lines / 4, t_extreme);
}
if (b_extreme + t_extreme + 1 > edit->num_widget_lines) {
int n;
n = b_extreme + t_extreme;
b_extreme = (b_extreme * (edit->num_widget_lines - 1)) / n;
t_extreme = (t_extreme * (edit->num_widget_lines - 1)) / n;
}
if (l_extreme + r_extreme + 1 > edit->num_widget_columns) {
int n;
n = l_extreme + t_extreme;
l_extreme = (l_extreme * (edit->num_widget_columns - 1)) / n;
r_extreme = (r_extreme * (edit->num_widget_columns - 1)) / n;
}
p = edit_get_col (edit);
edit_update_curs_row (edit);
outby = p + edit->start_col - edit->num_widget_columns + 1 + (r_extreme + edit->found_len);
if (outby > 0)
edit_scroll_right (edit, outby);
outby = l_extreme - p - edit->start_col;
if (outby > 0)
edit_scroll_left (edit, outby);
p = edit->curs_row;
outby = p - edit->num_widget_lines + 1 + b_extreme;
if (outby > 0)
edit_scroll_downward (edit, outby);
outby = t_extreme - p;
if (outby > 0)
edit_scroll_upward (edit, outby);
edit_update_curs_row (edit);
}
/** this scrolls the text so that cursor is on the screen */
void
edit_scroll_screen_over_cursor (WEdit * edit)
{
int p;
int outby;
int b_extreme, t_extreme, l_extreme, r_extreme;
if (edit->widget.lines <= 0 || edit->widget.cols <= 0)
return;
edit->widget.cols -= EDIT_TEXT_HORIZONTAL_OFFSET + option_line_state_width;
edit->widget.lines -= EDIT_TEXT_VERTICAL_OFFSET;
r_extreme = EDIT_RIGHT_EXTREME;
l_extreme = EDIT_LEFT_EXTREME;
b_extreme = EDIT_BOTTOM_EXTREME;
t_extreme = EDIT_TOP_EXTREME;
if (edit->found_len)
{
b_extreme = max (edit->widget.lines / 4, b_extreme);
t_extreme = max (edit->widget.lines / 4, t_extreme);
}
if (b_extreme + t_extreme + 1 > edit->widget.lines)
{
int n;
n = b_extreme + t_extreme;
if (n == 0)
n = 1;
b_extreme = (b_extreme * (edit->widget.lines - 1)) / n;
t_extreme = (t_extreme * (edit->widget.lines - 1)) / n;
}
if (l_extreme + r_extreme + 1 > edit->widget.cols)
{
int n;
n = l_extreme + t_extreme;
if (n == 0)
n = 1;
l_extreme = (l_extreme * (edit->widget.cols - 1)) / n;
r_extreme = (r_extreme * (edit->widget.cols - 1)) / n;
}
p = edit_get_col (edit) + edit->over_col;
edit_update_curs_row (edit);
outby = p + edit->start_col - edit->widget.cols + 1 + (r_extreme + edit->found_len);
if (outby > 0)
edit_scroll_right (edit, outby);
outby = l_extreme - p - edit->start_col;
if (outby > 0)
edit_scroll_left (edit, outby);
p = edit->curs_row;
outby = p - edit->widget.lines + 1 + b_extreme;
if (outby > 0)
edit_scroll_downward (edit, outby);
outby = t_extreme - p;
if (outby > 0)
edit_scroll_upward (edit, outby);
edit_update_curs_row (edit);
edit->widget.lines += EDIT_TEXT_VERTICAL_OFFSET;
edit->widget.cols += EDIT_TEXT_HORIZONTAL_OFFSET + option_line_state_width;
}
/** this scrolls the text so that cursor is on the screen */
void
edit_scroll_screen_over_cursor (WEdit * edit)
{
Widget *w = WIDGET (edit);
long p;
long outby;
int b_extreme, t_extreme, l_extreme, r_extreme;
if (w->lines <= 0 || w->cols <= 0)
return;
w->lines -= EDIT_TEXT_VERTICAL_OFFSET;
w->cols -= EDIT_TEXT_HORIZONTAL_OFFSET + option_line_state_width;
if (!edit->fullscreen)
{
w->x++;
w->cols -= 2;
w->y++;
w->lines -= 2;
}
r_extreme = EDIT_RIGHT_EXTREME;
l_extreme = EDIT_LEFT_EXTREME;
b_extreme = EDIT_BOTTOM_EXTREME;
t_extreme = EDIT_TOP_EXTREME;
if (edit->found_len != 0)
{
b_extreme = max (w->lines / 4, b_extreme);
t_extreme = max (w->lines / 4, t_extreme);
}
if (b_extreme + t_extreme + 1 > w->lines)
{
int n;
n = b_extreme + t_extreme;
if (n == 0)
n = 1;
b_extreme = (b_extreme * (w->lines - 1)) / n;
t_extreme = (t_extreme * (w->lines - 1)) / n;
}
if (l_extreme + r_extreme + 1 > w->cols)
{
int n;
n = l_extreme + t_extreme;
if (n == 0)
n = 1;
l_extreme = (l_extreme * (w->cols - 1)) / n;
r_extreme = (r_extreme * (w->cols - 1)) / n;
}
p = edit_get_col (edit) + edit->over_col;
edit_update_curs_row (edit);
outby = p + edit->start_col - w->cols + 1 + (r_extreme + edit->found_len);
if (outby > 0)
edit_scroll_right (edit, outby);
outby = l_extreme - p - edit->start_col;
if (outby > 0)
edit_scroll_left (edit, outby);
p = edit->curs_row;
outby = p - w->lines + 1 + b_extreme;
if (outby > 0)
edit_scroll_downward (edit, outby);
outby = t_extreme - p;
if (outby > 0)
edit_scroll_upward (edit, outby);
edit_update_curs_row (edit);
w->lines += EDIT_TEXT_VERTICAL_OFFSET;
w->cols += EDIT_TEXT_HORIZONTAL_OFFSET + option_line_state_width;
if (!edit->fullscreen)
{
w->x--;
w->cols += 2;
w->y--;
w->lines += 2;
}
}
