patch 8.1.1714: cannot preview a file in a popup windowv8.1.1714

Problem:    Cannot preview a file in a popup window.
Solution:   Add the 'previewpopup' option.

2 files changed, 19 insertions, 2 deletions

diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index ad50bfce3..7549ed8b1 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -5627,7 +5627,16 @@ A jump table for the options with a short description can be found at |Q_op|.
 			{not available when compiled without the |+windows| or
 			|+quickfix| features}
 	Default height for a preview window.  Used for |:ptag| and associated
-	commands.  Used for |CTRL-W_}| when no count is given.
+	commands.  Used for |CTRL-W_}| when no count is given.  Not used when
+	'previewpopup' is set.
+
+					*'previewpopup'* *'pvp'*
+'previewpopup' 'pvp'	string (default empty)
+			global
+			{not available when compiled without the |+windows|,
+			|+textprop| or |+quickfix| feature}
+	When not empty a popup window is used for commands that would open a
+	preview window.  See |preview-popup|.
 
 					*'previewwindow'* *'nopreviewwindow'*
 					*'pvw'* *'nopvw'* *E590*
diff --git a/runtime/doc/windows.txt b/runtime/doc/windows.txt
index 2c0cdc3b0..1c6702fc2 100644
--- a/runtime/doc/windows.txt
+++ b/runtime/doc/windows.txt
@@ -864,7 +864,15 @@ height of the preview window when it's opened.  The 'previewwindow' option is
 set in the preview window to be able to recognize it.  The 'winfixheight'
 option is set to have it keep the same height when opening/closing other
 windows.
-
+						*preview-popup*
+Alternatively, a popup window can be used by setting the 'previewpopup'
+option.  When set, it overrules the 'previewwindow' and 'previewheight'
+settings.  The option is a comma separated list of values:
+	height		maximum height of the popup
+	width		maximu width of the popup
+Example: >
+	:set previewpopup=height:10,width:60
+<
 						*:pta* *:ptag*
 :pta[g][!] [tagname]
 		Does ":tag[!] [tagname]" and shows the found tag in a