Change --preview-window delimiter from : to , for consistency

Delimiter : was chosen when --preview-option only supported position and
size attributes. e.g. up:50%

3 files changed, 14 insertions, 13 deletions

diff --git a/man/man1/fzf.1 b/man/man1/fzf.1
index d5b26c9f..ae16a75a 100644
--- a/man/man1/fzf.1
+++ b/man/man1/fzf.1
@@ -444,7 +444,7 @@ e.g.
       done'\fR
 .RE
 .TP
-.BI "--preview-window=" "[POSITION][:SIZE[%]][:border-BORDER_OPT][:[no]wrap][:[no]follow][:[no]cycle][:[no]hidden][:+SCROLL[OFFSETS][/DENOM]][:~HEADER_LINES][:default]"
+.BI "--preview-window=" "[POSITION][,SIZE[%]][,border-BORDER_OPT][,[no]wrap][,[no]follow][,[no]cycle][,[no]hidden][,+SCROLL[OFFSETS][/DENOM]][,~HEADER_LINES][,default]"
 
 .RS
 .B POSITION: (default: right)
@@ -501,8 +501,8 @@ are always visible.
 .RS
 e.g.
      \fB# Non-default scroll window positions and sizes
-     fzf --preview="head {}" --preview-window=up:30%
-     fzf --preview="file {}" --preview-window=down:1
+     fzf --preview="head {}" --preview-window=up,30%
+     fzf --preview="file {}" --preview-window=down,1
 
      # Initial scroll offset is set to the line number of each line of
      # git grep output *minus* 5 lines (-5)
@@ -520,7 +520,7 @@ e.g.
      git grep --line-number '' |
        fzf --delimiter : \\
            --preview 'bat --style=full --color=always --highlight-line {2} {1}' \\
-           --preview-window '~3:+{2}+3/2'
+           --preview-window '~3,+{2}+3/2'
 
      # Display top 3 lines as the fixed header
      fzf --preview 'bat --style=full --color=always {}' --preview-window '~3'\fR
diff --git a/src/options.go b/src/options.go
index bb134fa0..a136b859 100644
--- a/src/options.go
+++ b/src/options.go
@@ -81,11 +81,11 @@ const usage = `usage: fzf [options]
   Preview
     --preview=COMMAND     Command to preview highlighted line ({})
     --preview-window=OPT  Preview window layout (default: right:50%)
-                          [up|down|left|right][:SIZE[%]]
-                          [:[no]wrap][:[no]cycle][:[no]follow][:[no]hidden]
-                          [:border-BORDER_OPT]
-                          [:+SCROLL[OFFSETS][/DENOM]][:~HEADER_LINES]
-                          [:default]
+                          [up|down|left|right][,SIZE[%]]
+                          [,[no]wrap][,[no]cycle][,[no]follow][,[no]hidden]
+                          [,border-BORDER_OPT]
+                          [,+SCROLL[OFFSETS][/DENOM]][,~HEADER_LINES]
+                          [,default]
 
   Scripting
     -q, --query=STR       Start the finder with the given query
@@ -1078,10 +1078,11 @@ func parseInfoStyle(str string) infoStyle {
 }
 
 func parsePreviewWindow(opts *previewOpts, input string) {
-	tokens := strings.Split(input, ":")
+	delimRegex := regexp.MustCompile("[:,]") // : for backward compatibility
 	sizeRegex := regexp.MustCompile("^[0-9]+%?$")
 	offsetRegex := regexp.MustCompile(`^(\+{-?[0-9]+})?([+-][0-9]+)*(-?/[1-9][0-9]*)?$`)
 	headerRegex := regexp.MustCompile("^~(0|[1-9][0-9]*)$")
+	tokens := delimRegex.Split(input, -1)
 	for _, token := range tokens {
 		switch token {
 		case "":
@@ -1382,7 +1383,7 @@ func parseOptions(opts *Options, allArgs []string) {
 			opts.Preview.command = ""
 		case "--preview-window":
 			parsePreviewWindow(&opts.Preview,
-				nextString(allArgs, &i, "preview window layout required: [up|down|left|right][:SIZE[%]][:rounded|sharp|noborder][:wrap][:cycle][:hidden][:+SCROLL[OFFSETS][/DENOM]][:~HEADER_LINES][:default]"))
+				nextString(allArgs, &i, "preview window layout required: [up|down|left|right][,SIZE[%]][,border-BORDER_OPT][,wrap][,cycle][,hidden][,+SCROLL[OFFSETS][/DENOM]][,~HEADER_LINES][,default]"))
 		case "--height":
 			opts.Height = parseHeight(nextString(allArgs, &i, "height required: HEIGHT[%]"))
 		case "--min-height":
diff --git a/src/options_test.go b/src/options_test.go
index ce135413..bb946235 100644
--- a/src/options_test.go
+++ b/src/options_test.go
@@ -384,7 +384,7 @@ func TestPreviewOpts(t *testing.T) {
 		opts.Preview.size.size == 50) {
 		t.Error()
 	}
-	opts = optsFor("--preview", "cat {}", "--preview-window=left:15:hidden:wrap:+{1}-/2")
+	opts = optsFor("--preview", "cat {}", "--preview-window=left:15,hidden,wrap:+{1}-/2")
 	if !(opts.Preview.command == "cat {}" &&
 		opts.Preview.hidden == true &&
 		opts.Preview.wrap == true &&
@@ -394,7 +394,7 @@ func TestPreviewOpts(t *testing.T) {
 		opts.Preview.size.size == 15) {
 		t.Error(opts.Preview)
 	}
-	opts = optsFor("--preview-window=up:15:wrap:hidden:+{1}+3-1-2/2", "--preview-window=down", "--preview-window=cycle")
+	opts = optsFor("--preview-window=up,15,wrap,hidden,+{1}+3-1-2/2", "--preview-window=down", "--preview-window=cycle")
 	if !(opts.Preview.command == "" &&
 		opts.Preview.hidden == true &&
 		opts.Preview.wrap == true &&