[feature] fzf support

bin/d

@@ -1,10 +1,27 @@
 #!/bin/sh
 
-# shellcheck disable=2086
+# shellcheck disable=2086,2059
 
+# dmenu optional patches: preselect / center
+# fzf selector: 'fzf --reverse --height=30%%'
 set -e
 DIR="$(readlink -f "$(dirname "$0")")"
-DMENU_OPTS='-i -c -fn monospace:13 -nb #626262 -nf  #bbbbbb -sb  #5b97f7 -sf  #eeeeee -l 20'
+
+# compose selector command if not specified
+if [ -z "$SELECTOR" ]; then
+    if command  -v dmenu >/dev/null; then
+        SELECTOR='dmenu -i -fn monospace:13 -nb #626262 -nf  #bbbbbb -sb  #5b97f7 -sf  #eeeeee -l 20'
+        dmenu -h 2>&1 | grep -qF ' [-n number]' && SELECTOR="$SELECTOR -n %i"
+        dmenu -h 2>&1 | grep -qP '\[-\w*c\w*\]' && SELECTOR="$SELECTOR -c"
+    elif command -v fzf >/dev/null; then
+        SELECTOR='fzf --reverse --height=30%%'
+    else
+        echo 'require either dmenu or fzf'
+        exit 1
+    fi
+fi
+EMPTY_RESULT=' 查无结果'
+GREETING='﬜ 请输入单词并回车' 
 
 
 request() {
@@ -25,8 +42,17 @@ pronounce() {
 }
 
 display() {
-    echo "$RESULT" \
-        | dmenu $DMENU_OPTS \
+    R="$RESULT"
+    if [ -z "$R" ]; then
+        if [ -n "$SENTENCE" ]; then
+            R="$EMPTY_RESULT : $SENTENCE"
+        else
+            R="$GREETING"
+        fi
+    fi
+    SELECT=$(printf "$SELECTOR" "$LINE_NUM")
+    echo "$R" \
+        | $SELECT \
         | if IFS= read -r INPUT; then
             if echo "$INPUT" | grep -qP ' '; then
                 if echo "$INPUT" | grep -q '美'; then
@@ -34,8 +60,12 @@ display() {
                 else
                     pronounce "$SENTENCE" 1 &
                 fi
-                display
-            elif echo "$INPUT" | grep -P '^ '; then
+                echo awk '"'$INPUT'" { print NR }'
+                LINE_NUM=$(echo "$RESULT" | awk -v INPUT="$INPUT" '$0==INPUT { print NR - 1 }')
+                display $LINE_NUM
+            elif echo "$INPUT" | grep -qF "$EMPTY_RESULT" || echo "$INPUT" | grep -qF "$GREETING"; then
+                return
+            elif echo "$INPUT" | grep -qP '^ '; then
                 printf "%s" "$INPUT" | sed 's/^\s+//' |  xsel -b
             else
                 SENTENCE="$INPUT"