From a4e59b37021326e304c311825ba52a52b02bd9c0 Mon Sep 17 00:00:00 2001
From: Fazlul Shahriar <fshahriar@gmail.com>
Date: Tue, 7 Jan 2020 15:02:01 -0500
Subject: 9term: add a "look" menu item (#299)

Add a menu item which functions similar to acme's `Look` command.

This is copied from 9front. See:
https://code.9front.org/hg/plan9front/rev/1f1596dbca51
https://code.9front.org/hg/plan9front/rev/d2de1d2f7b48
---
 src/cmd/9term/9term.c |  6 ++++++
 src/cmd/9term/dat.h   |  1 +
 src/cmd/9term/wind.c  | 25 +++++++++++++++++++++++++
 3 files changed, 32 insertions(+)

(limited to 'src/cmd/9term')

diff --git a/src/cmd/9term/9term.c b/src/cmd/9term/9term.c
index 107afed3..81c39a63 100644
--- a/src/cmd/9term/9term.c
+++ b/src/cmd/9term/9term.c
@@ -288,6 +288,7 @@ enum
 	Paste,
 	Snarf,
 	Plumb,
+	Look,
 	Send,
 	Scroll,
 	Cook
@@ -298,6 +299,7 @@ char		*menu2str[] = {
 	"paste",
 	"snarf",
 	"plumb",
+	"look",
 	"send",
 	"cook",
 	"scroll",
@@ -348,6 +350,10 @@ button2menu(Window *w)
 		wplumb(w);
 		break;
 
+	case Look:
+		wlook(w);
+		break;
+
 	case Send:
 		riogetsnarf();
 		wsnarf(w);
diff --git a/src/cmd/9term/dat.h b/src/cmd/9term/dat.h
index c1af6592..25270a0e 100644
--- a/src/cmd/9term/dat.h
+++ b/src/cmd/9term/dat.h
@@ -177,6 +177,7 @@ void		wmousectl(Window*);
 void		wmovemouse(Window*, Point);
 void		wpaste(Window*);
 void		wplumb(Window*);
+void		wlook(Window*);
 void		wrefresh(Window*, Rectangle);
 void		wrepaint(Window*);
 void		wresize(Window*, Image*, int);
diff --git a/src/cmd/9term/wind.c b/src/cmd/9term/wind.c
index 7dc20443..d47e8467 100644
--- a/src/cmd/9term/wind.c
+++ b/src/cmd/9term/wind.c
@@ -906,6 +906,31 @@ winborder(Window *w, Point xy)
 	return ptinrect(xy, w->screenr) && !ptinrect(xy, insetrect(w->screenr, wscale(w, Selborder)));
 }
 
+void
+wlook(Window *w)
+{
+	int i, n, e;
+
+	i = w->q1;
+	n = i - w->q0;
+	e = w->nr - n;
+	if(n <= 0 || e < n)
+		return;
+
+	if(i > e)
+		i = 0;
+
+	while(runestrncmp(w->r+w->q0, w->r+i, n) != 0){
+		if(i < e)
+			i++;
+		else
+			i = 0;
+	}
+
+	wsetselect(w, i, i+n);
+	wshow(w, i);
+}
+
 void
 wmousectl(Window *w)
 {
-- 
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