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	tvi: ^E and ^Y commands - neatvi - [fork] simple vi-type editor with UTF-8 supp…
	git clone git://src.adamsgaard.dk/neatvi
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	---
	commit 1211e16126a16bac24629d9810462a22a722e75c
	parent bc9dd7dfbc434e6260ca5002cbc6501ced9adcb6
	Author: Ali Gholami Rudi <[email protected]>
	Date: Tue, 12 May 2015 18:11:27 +0430

	vi: ^E and ^Y commands

	Diffstat:
	M vi.c \| 36 ++++++++++++++++++++++++++---…

	1 file changed, 30 insertions(+), 6 deletions(-)
	---
	diff --git a/vi.c b/vi.c
	t@@ -611,6 +611,24 @@ static void vc_join(int arg)
	sbuf_free(sb);
	}

	+static int vi_scrollforeward(int cnt)
	+{
	+ if (xtop >= lbuf_len(xb) - 1)
	+ return 1;
	+ xtop = MIN(lbuf_len(xb) - 1, xtop + cnt);
	+ xrow = MAX(xrow, xtop);
	+ return 0;
	+}
	+
	+static int vi_scrollbackward(int cnt)
	+{
	+ if (xtop == 0)
	+ return 1;
	+ xtop = MAX(0, xtop - cnt);
	+ xrow = MIN(xrow, xtop + xrows - 1);
	+ return 0;
	+}
	+
	static void vi(void)
	{
	int mark;
	t@@ -643,21 +661,27 @@ static void vi(void)
	redraw = 1;
	break;
	case TERMCTRL('b'):
	- if (xtop == 0)
	+ if (vi_scrollbackward((pre1 ? pre1 : 1) * (xro…
	break;
	- xtop = MAX(0, xtop - xrows + 1);
	- xrow = MIN(xrow, xtop + xrows - 1);
	lbuf_postindents(xb, &xrow, &xcol);
	redraw = 1;
	break;
	case TERMCTRL('f'):
	- if (xtop >= lbuf_len(xb) - 1)
	+ if (vi_scrollforeward((pre1 ? pre1 : 1) * (xro…
	break;
	- xtop = MIN(lbuf_len(xb) - 1, xtop + xrows - 1);
	- xrow = MAX(xrow, xtop);
	lbuf_postindents(xb, &xrow, &xcol);
	redraw = 1;
	break;
	+ case TERMCTRL('e'):
	+ if (vi_scrollforeward((pre1 ? pre1 : 1)))
	+ break;
	+ redraw = 1;
	+ break;
	+ case TERMCTRL('y'):
	+ if (vi_scrollbackward((pre1 ? pre1 : 1)))
	+ break;
	+ redraw = 1;
	+ break;
	case TERMCTRL('r'):
	lbuf_redo(xb);
	redraw = 1;