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	tvi: ^d and ^u - neatvi - [fork] simple vi-type editor with UTF-8 support
	git clone git://src.adamsgaard.dk/neatvi
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	---
	commit c54948868fdd6994a66acff21cb980fef4356465
	parent 6a4f7acda55fd2175a268b20b308ee70ae2fa38b
	Author: Ali Gholami Rudi <[email protected]>
	Date: Wed, 17 Jun 2015 19:40:04 +0430

	vi: ^d and ^u

	Tested by Christian Neukirchen <[email protected]>.

	Diffstat:
	M vi.c \| 25 +++++++++++++++++++++++++

	1 file changed, 25 insertions(+), 0 deletions(-)
	---
	diff --git a/vi.c b/vi.c
	t@@ -22,6 +22,7 @@ static int vi_ybuf; /* current yank buffer */
	static char vi_kmap; / current insertion keymap */
	static int vi_pcol; /* the column requested by \| command */
	static int vi_printed; /* ex_print() calls since the last comma…
	+static int vi_scroll; /* scroll amount for ^f and ^d*/

	static void vi_wait(void)
	{
	t@@ -1066,6 +1067,30 @@ static void vi(void)
	break;
	redraw = 1;
	break;
	+ case TK_CTL('u'):
	+ if (xrow == 0)
	+ break;
	+ if (vi_arg1)
	+ vi_scroll = vi_arg1;
	+ n = vi_scroll ? vi_scroll : xrows / 2;
	+ xrow = MAX(0, xrow - n);
	+ if (xtop > 0)
	+ xtop = MAX(0, xtop - n);
	+ redraw = 1;
	+ xoff = lbuf_indents(xb, xrow);
	+ break;
	+ case TK_CTL('d'):
	+ if (xrow == lbuf_len(xb) - 1)
	+ break;
	+ if (vi_arg1)
	+ vi_scroll = vi_arg1;
	+ n = vi_scroll ? vi_scroll : xrows / 2;
	+ xrow = MIN(MAX(0, lbuf_len(xb) - 1), xrow + n);
	+ if (xtop < lbuf_len(xb) - xrows)
	+ xtop = MIN(lbuf_len(xb) - xrows, xtop …
	+ redraw = 1;
	+ xoff = lbuf_indents(xb, xrow);
	+ break;
	case TK_CTL('z'):
	term_pos(xrows, 0);
	term_suspend();