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draw tick on input line

--- a/main.c

+++ b/main.c

@@ -19,6 +19,7 @@

 enum

 {

 	Maxlines = 4096,

+	Tickw = 3,

 	Padding = 4,

 };

@@ -26,6 +27,7 @@

 Keyboardctl *kctl;

 Image *selbg;

 Image *mfg;

+Image *tick;

 Rectangle ir;

 Rectangle lr;

 int lh;

@@ -117,11 +119,14 @@

 {

 	char b[10] = {0};

 	Point p;

+	Rectangle r;

 	int i;

 	draw(screen, screen->r, display->white, nil, ZP);

 	p = string(screen, addpt(screen->r.min, Pt(Padding, Padding)), display->black, ZP, font, "> ");

-	stringn(screen, p, display->black, ZP, font, input, ninput);

+	p = stringn(screen, p, display->black, ZP, font, input, ninput);

+	r = Rect(p.x, p.y, p.x + Dx(tick->r), p.y + Dy(tick->r));

+	draw(screen, r, tick, nil, ZP);	

 	for(i = 0; i < lcount; i++)

 		drawline(i, i == lsel);

 	i = snprint(b, sizeof b, "%d/%d", nmatches, nlines);

@@ -227,6 +232,24 @@

 	}

 }

+Image*

+createtick(void)

+{

+	Image *t;

+

+	t = allocimage(display, Rect(0, 0, Tickw, font->height), screen->chan, 0, DWhite);

+	if(t == nil)

+		return 0;

+	/* background color */

+	draw(t, t->r, display->white, nil, ZP);

+	/* vertical line */

+	draw(t, Rect(Tickw/2, 0, Tickw/2+1, font->height), display->black, nil, ZP);

+	/* box on each end */

+	draw(t, Rect(0, 0, Tickw, Tickw), display->black, nil, ZP);

+	draw(t, Rect(0, font->height-Tickw, Tickw, font->height), display->black, nil, ZP);

+	return t;

+}

+

 void

 usage(void)

 {

@@ -271,6 +294,7 @@

 	a[Emouse].c = mctl->c;

 	a[Eresize].c = mctl->resizec;

 	a[Ekeyboard].c = kctl->c;

+	tick = createtick();

 	selbg = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0xEFEFEFFF);

 	mfg = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0x999999FF);

 	loff = 0;