From d99169da2d9b910839ad826d3d501c87b5ba9bb9 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Sun, 30 Apr 2017 12:06:41 +0900
Subject: [PATCH] Use FZF_PREVIEW_HEIGHT if available. Requires fzf 0.16.7.

Close #361
---
 bin/preview.rb | 10 +++++++---
 bin/preview.sh | 31 +++++++++++++++++--------------
 2 files changed, 24 insertions(+), 17 deletions(-)

diff --git a/bin/preview.rb b/bin/preview.rb
index a46fd88..09b1bc0 100755
--- a/bin/preview.rb
+++ b/bin/preview.rb
@@ -33,9 +33,13 @@ if `file --mime "#{file}"` =~ /binary/
 end
 
 center = (center || 0).to_i
-height = File.readable?('/dev/tty') ? `stty size < /dev/tty`.split.first.to_i : 40
-height /= 2 if split
-height -= 2 # preview border
+if ENV['FZF_PREVIEW_HEIGHT']
+  height = ENV['FZF_PREVIEW_HEIGHT'].to_i
+else
+  height = File.readable?('/dev/tty') ? `stty size < /dev/tty`.split.first.to_i : 40
+  height /= 2 if split
+  height -= 2 # preview border
+end
 offset = [1, center - height / 3].max
 
 IO.popen(['sh', '-c', COMMAND.gsub('{}', Shellwords.shellescape(path))]) do |io|
diff --git a/bin/preview.sh b/bin/preview.sh
index a798662..330517d 100755
--- a/bin/preview.sh
+++ b/bin/preview.sh
@@ -4,13 +4,13 @@ REVERSE="\x1b[7m"
 RESET="\x1b[m"
 
 if [ "$1" == "-v" ]; then
-    SPLIT=1
-    shift
+  SPLIT=1
+  shift
 fi
 
 if [ -z "$1" ]; then
-    echo "usage: $0 [-v] FILENAME[:LINENO][:IGNORED]"
-    exit 1
+  echo "usage: $0 [-v] FILENAME[:LINENO][:IGNORED]"
+  exit 1
 fi
 
 IFS=':' read -r -a INPUT <<< "$1"
@@ -18,8 +18,8 @@ FILE=${INPUT[0]}
 CENTER=${INPUT[1]}
 
 if [ ! -r "$FILE" ]; then
-    echo "File not found ${FILE}"
-    exit 1
+  echo "File not found ${FILE}"
+  exit 1
 fi
 
 if [[ "$(file --mime "$FILE")" =~ binary ]]; then
@@ -28,22 +28,25 @@ if [[ "$(file --mime "$FILE")" =~ binary ]]; then
 fi
 
 if [ -z "$CENTER" ]; then
-    CENTER=1
+  CENTER=1
 fi
 
-if [ -r /dev/tty ]; then
-    LINES=$(stty size < /dev/tty | awk '{print $1}')
+if [ -n "$FZF_PREVIEW_HEIGHT" ]; then
+  LINES=$FZF_PREVIEW_HEIGHT
 else
+  if [ -r /dev/tty ]; then
+    LINES=$(stty size < /dev/tty | awk '{print $1}')
+  else
     LINES=40
-fi
-
-if [ -n "$SPLIT" ]; then
+  fi
+  if [ -n "$SPLIT" ]; then
     LINES=$(($LINES/2)) # using horizontal split
+  fi
+  LINES=$(($LINES-2)) # remove preview border
 fi
-LINES=$(($LINES-2)) # remove preview border
 
 FIRST=$(($CENTER-$LINES/3))
 FIRST=$(($FIRST < 1 ? 1 : $FIRST))
 LAST=$((${FIRST}+${LINES}-1))
 
-awk "NR >= $FIRST && NR <= $LAST {if (NR == $CENTER) printf(\"\x1b[7m%5d %s\n\x1b[m\", NR, \$0); else printf(\"%5d %s\n\", NR, \$0)}" $FILE
+awk "NR >= $FIRST && NR <= $LAST {if (NR == $CENTER) printf(\"$REVERSE%5d %s\n$RESET\", NR, \$0); else printf(\"%5d %s\n\", NR, \$0)}" $FILE