Vim documentation: popup
main help file
*popup.txt* For Vim version 8.2. Last change: 2019 Nov 30
VIM REFERENCE MANUAL by Bram Moolenaar
Displaying text in a floating window. *popup* *popup-window* *popupwin*
1. Introduction |popup-intro|
Window position and size |popup-position|
Closing the popup window |popup-close|
Popup buffer and window |popup-buffer|
2. Functions |popup-functions|
Details |popup-function-details|
3. Usage |popup-usage|
popup_create() arguments |popup_create-arguments|
Popup text properties |popup-props|
Position popup with textprop |popup-textprop-pos|
Popup filter |popup-filter|
Popup callback |popup-callback|
Popup scrollbar |popup-scrollbar|
Popup mask |popup-mask|
4. Examples |popup-examples|
{not available if the |+popupwin| feature was disabled at compile time}
==============================================================================
1. Introduction *popup-intro*
We are talking about popup windows here, text that goes on top of the regular
windows and is under control of a plugin. You cannot edit the text in the
popup window like with regular windows.
A popup window can be used for such things as:
- briefly show a message without overwriting the command line
- prompt the user with a dialog
- display contextual information while typing
- give extra information for auto-completion
The text in the popup window can be colored with |text-properties|. It is
also possible to use syntax highlighting.
The default color used is "Pmenu". If you prefer something else use the
"highlight" argument or the 'wincolor' option, e.g.:
hi MyPopupColor ctermbg=lightblue guibg=lightblue
call setwinvar(winid, '&wincolor', 'MyPopupColor')
'hlsearch' highlighting is not displayed in a popup window.
A popup window has a window-ID like other windows, but behaves differently.
The size can be up to the whole Vim window and it overlaps other windows.
Popup windows can also overlap each other. The "zindex" property specifies
what goes on top of what.
The popup window contains a buffer, and that buffer is always associated with
the popup window. The window cannot be in Normal, Visual or Insert mode, it
does not get keyboard focus. You can use functions like `setbufline()` to
change the text in the buffer. There are more differences from how this
window and buffer behave compared to regular windows and buffers, see
|popup-buffer|.
If this is not what you are looking for, check out other popup functionality:
- popup menu, see |popup-menu|
- balloon, see |balloon-eval|
WINDOW POSITION AND SIZE *popup-position*
The height of the window is normally equal to the number of, possibly
wrapping, lines in the buffer. It can be limited with the "maxheight"
property. You can use empty lines to increase the height or the "minheight"
property.
The width of the window is normally equal to the longest line in the buffer.
It can be limited with the "maxwidth" property. You can use spaces to
increase the width or use the "minwidth" property.
By default the 'wrap' option is set, so that no text disappears. Otherwise,
if there is not enough space then the window is shifted left in order to
display more text. When right-aligned the window is shifted right to display
more text. The shifting can be disabled with the "fixed" property.
Vim tries to show the popup in the location you specify. In some cases, e.g.
when the popup would go outside of the Vim window, it will show it somewhere
nearby. E.g. if you use `popup_atcursor()` the popup normally shows just above
the current cursor position, but if the cursor is close to the top of the Vim
window it will be placed below the cursor position.
When the screen scrolls up for output of an Ex command, popups move too, so
that they will not cover the output.
The current cursor position is displayed even when it is under a popup window.
That way you can still see where it is, even though you cannot see the text
that it is in.
CLOSING THE POPUP WINDOW *popup-close*
Normally the plugin that created the popup window is also in charge of closing
it. If somehow a popup hangs around, you can close all of them with:
call popup_clear()
Some popups, such as notifications, close after a specified time. This can be
set with the "time" property on `popup_create()`.
Otherwise, a popup can be closed by clicking on the X in the top-right corner
or by clicking anywhere inside the popup. This must be enabled with the
"close" property. It is set by default for notifications.
POPUP BUFFER AND WINDOW *popup-buffer*
If a popup function is called to create a popup from text, a new buffer is
created to hold the text and text properties of the popup window. The buffer
is always associated with the popup window and manipulation is restricted:
- the buffer has no name
- 'buftype' is "popup"
- 'swapfile' is off
- 'bufhidden' is "hide"
- 'buflisted' is off
- 'undolevels' is -1: no undo at all
- all other buffer-local and window-local options are set to their Vim default
value.
It is possible to change the specifically mentioned options, but anything
might break then, so better leave them alone.
The window does have a cursor position, but the cursor is not displayed. In
fact, the cursor in the underlying window is displayed, as if it peeks through
the popup, so you can see where it is.
To execute a command in the context of the popup window and buffer use
`win_execute()`. Example:
call win_execute(winid, 'syntax enable')
Options can be set on the window with `setwinvar()`, e.g.:
call setwinvar(winid, '&wrap', 0)
And options can be set on the buffer with `setbufvar()`, e.g.:
call setbufvar(winbufnr(winid), '&filetype', 'java')
You can also use `win_execute()` with a ":setlocal" command.
==============================================================================
2. Functions *popup-functions*
Creating a popup window:
|popup_create()| centered in the screen
|popup_atcursor()| just above the cursor position, closes when
the cursor moves away
|popup_beval()| at the position indicated by v:beval_
variables, closes when the mouse moves away
|popup_notification()| show a notification for three seconds
|popup_dialog()| centered with padding and border
|popup_menu()| prompt for selecting an item from a list
Manipulating a popup window:
|popup_hide()| hide a popup temporarily
|popup_show()| show a previously hidden popup
|popup_move()| change the position and size of a popup
|popup_setoptions()| override options of a popup
|popup_settext()| replace the popup buffer contents
Closing popup windows:
|popup_close()| close one popup
|popup_clear()| close all popups
Filter functions:
|popup_filter_menu()| select from a list of items
|popup_filter_yesno()| blocks until 'y' or 'n' is pressed
Other:
|popup_getoptions()| get current options for a popup
|popup_getpos()| get actual position and size of a popup
|popup_locate()| find popup window at a screen position
DETAILS *popup-function-details*
popup_atcursor({what}, {options}) *popup_atcursor()*
Show the {what} above the cursor, and close it when the cursor
moves. This works like:
call popup_create({what}, #{
\ pos: 'botleft',
\ line: 'cursor-1',
\ col: 'cursor',
\ moved: 'WORD',
\ })
Use {options} to change the properties.
If "pos" is passed as "topleft" then the default for "line"
becomes "cursor+1".
Can also be used as a YXXYmethod|:
GetText()->popup_atcursor({})
popup_beval({what}, {options}) *popup_beval()*
Show the {what} above the position from 'ballooneval' and
close it when the mouse moves. This works like:
let pos = screenpos(v:beval_winnr, v:beval_lnum, v:beval_col)
call popup_create({what}, #{
\ pos: 'botleft',
\ line: pos.row - 1,
\ col: pos.col,
\ mousemoved: 'WORD',
\ })
Use {options} to change the properties.
See |popup_beval_example| for an example.
Can also be used as a YXXYmethod|:
GetText()->popup_beval({})
*popup_clear()*
popup_clear() Emergency solution to a misbehaving plugin: close all popup
windows for the current tab and global popups.
popup_close({id} [, {result}]) *popup_close()*
Close popup {id}. The window and the associated buffer will
be deleted.
If the popup has a callback it will be called just before the
popup window is deleted. If the optional {result} is present
it will be passed as the second argument of the callback.
Otherwise zero is passed to the callback.
Can also be used as a YXXYmethod|:
GetPopup()->popup_close()
popup_create({what}, {options}) *popup_create()*
Open a popup window showing {what}, which is either:
- a buffer number
- a string
- a list of strings
- a list of text lines with text properties
When {what} is not a buffer number, a buffer is created with
'buftype' set to "popup". That buffer will be wiped out once
the popup closes.
{options} is a dictionary with many possible entries.
See |popup_create-arguments| for details.
Returns a window-ID, which can be used with other popup
functions. Use `winbufnr()` to get the number of the buffer
in the window:
let winid = popup_create('hello', {})
let bufnr = winbufnr(winid)
call setbufline(bufnr, 2, 'second line')
In case of failure zero is returned.
Can also be used as a YXXYmethod|:
GetText()->popup_create({})
popup_dialog({what}, {options}) *popup_dialog()*
Just like |popup_create()| but with these default options:
call popup_create({what}, #{
\ pos: 'center',
\ zindex: 200,
\ drag: 1,
\ border: [],
\ padding: [],
\ mapping: 0,
\})
Use {options} to change the properties. E.g. add a 'filter'
option with value 'popup_filter_yesno'. Example:
call popup_create('do you want to quit (Yes/no)?', #{
\ filter: 'popup_filter_yesno',
\ callback: 'QuitCallback',
\ })
By default the dialog can be dragged, so that text below it
can be read if needed.
Can also be used as a YXXYmethod|:
GetText()->popup_dialog({})
popup_filter_menu({id}, {key}) *popup_filter_menu()*
Filter that can be used for a popup. These keys can be used:
j <Down> select item below
k <Up> select item above
<Space> <Enter> accept current selection
x Esc CTRL-C cancel the menu
Other keys are ignored.
A match is set on that line to highlight it, see
|popup_menu()|.
When the current selection is accepted the "callback" of the
popup menu is invoked with the index of the selected line as
the second argument. The first entry has index one.
Cancelling the menu invokes the callback with -1.
To add shortcut keys, see the example here:
|popup_menu-shortcut-example|
popup_filter_yesno({id}, {key}) *popup_filter_yesno()*
Filter that can be used for a popup. It handles only the keys
'y', 'Y' and 'n' or 'N'. Invokes the "callback" of the
popup menu with the 1 for 'y' or 'Y' and zero for 'n' or 'N'
as the second argument. Pressing Esc and 'x' works like
pressing 'n'. CTRL-C invokes the callback with -1. Other
keys are ignored.
See the example here: |popup_dialog-example|
popup_findinfo() *popup_findinfo()*
Get the |window-ID| for the popup info window, as it used by
the popup menu. See |complete-popup|. The info popup is
hidden when not used, it can be deleted with |popup_clear()|
and |popup_close()|. Use |popup_show()| to reposition it to
the item in the popup menu.
Returns zero if there is none.
popup_findpreview() *popup_findpreview()*
Get the |window-ID| for the popup preview window.
Return zero if there is none.
popup_getoptions({id}) *popup_getoptions()*
Return the {options} for popup {id} in a Dict.
A zero value means the option was not set. For "zindex" the
default value is returned, not zero.
The "moved" entry is a list with line number, minimum and
maximum column, [0, 0, 0] when not set.
The "mousemoved" entry is a list with screen row, minimum and
maximum screen column, [0, 0, 0] when not set.
"firstline" is the property set on the popup, unlike the
"firstline" obtained with |popup_getpos()| which is the actual
buffer line at the top of the popup window.
"border" and "padding" are not included when all values are
zero. When all values are one then an empty list is included.
"borderhighlight" is not included when all values are empty.
"scrollbarhighlight" and "thumbhighlight" are only included
when set.
"tabpage" will be -1 for a global popup, zero for a popup on
the current tabpage and a positive number for a popup on
another tabpage.
"textprop", "textpropid" and "textpropwin" are only present
when "textprop" was set.
If popup window {id} is not found an empty Dict is returned.
Can also be used as a YXXYmethod|:
GetPopup()->popup_getoptions()
popup_getpos({id}) *popup_getpos()*
Return the position and size of popup {id}. Returns a Dict
with these entries:
col screen column of the popup, one-based
line screen line of the popup, one-based
width width of the whole popup in screen cells
height height of the whole popup in screen cells
core_col screen column of the text box
core_line screen line of the text box
core_width width of the text box in screen cells
core_height height of the text box in screen cells
firstline line of the buffer at top (1 unless scrolled)
(not the value of the "firstline" property)
lastline line of the buffer at the bottom (updated when
the popup is redrawn)
scrollbar non-zero if a scrollbar is displayed
visible one if the popup is displayed, zero if hidden
Note that these are the actual screen positions. They differ
from the values in `popup_getoptions()` for the sizing and
positioning mechanism applied.
The "core_" values exclude the padding and border.
If popup window {id} is not found an empty Dict is returned.
Can also be used as a YXXYmethod|:
GetPopup()->popup_getpos()
popup_hide({id}) *popup_hide()*
If {id} is a displayed popup, hide it now. If the popup has a
filter it will not be invoked for so long as the popup is
hidden.
If window {id} does not exist nothing happens. If window {id}
exists but is not a popup window an error is given. *E993*
Can also be used as a YXXYmethod|:
GetPopup()->popup_hide()
popup_locate({row}, {col}) *popup_locate()*
Return the |window-ID| of the popup at screen position {row}
and {col}. If there are multiple popups the one with the
highest zindex is returned. If there are no popups at this
position then zero is returned.
popup_menu({what}, {options}) *popup_menu()*
Show the {what} near the cursor, handle selecting one of the
items with cursorkeys, and close it an item is selected with
Space or Enter. {what} should have multiple lines to make this
useful. This works like:
call popup_create({what}, #{
\ pos: 'center',
\ zindex: 200,
\ drag: 1,
\ wrap: 0,
\ border: [],
\ cursorline: 1,
\ padding: [0,1,0,1],
\ filter: 'popup_filter_menu',
\ mapping: 0,
\ })
The current line is highlighted with a match using
"PopupSelected", or "PmenuSel" if that is not defined.
Use {options} to change the properties. Should at least set
"callback" to a function that handles the selected item.
Example:
func ColorSelected(id, result)
" use a:result
endfunc
call popup_menu(['red', 'green', 'blue'], #{
\ callback: 'ColorSelected',
\ })
Can also be used as a YXXYmethod|:
GetChoices()->popup_menu({})
popup_move({id}, {options}) *popup_move()*
Move popup {id} to the position specified with {options}.
{options} may contain the items from |popup_create()| that
specify the popup position:
line
col
pos
maxheight
minheight
maxwidth
minwidth
fixed
For {id} see `popup_hide()`.
For other options see |popup_setoptions()|.
Can also be used as a YXXYmethod|:
GetPopup()->popup_move(options)
popup_notification({what}, {options}) *popup_notification()*
Show the {what} for 3 seconds at the top of the Vim window.
This works like:
call popup_create({what}, #{
\ line: 1,
\ col: 10,
\ minwidth: 20,
\ time: 3000,
\ tabpage: -1,
\ zindex: 300,
\ drag: 1,
\ highlight: 'WarningMsg',
\ border: [],
\ close: 'click',
\ padding: [0,1,0,1],
\ })
The PopupNotification highlight group is used instead of
WarningMsg if it is defined.
Without the |+timers| feature the popup will not disappear
automatically, the user has to click in it.
The position will be adjusted to avoid overlap with other
notifications.
Use {options} to change the properties.
Can also be used as a YXXYmethod|:
GetText()->popup_notification({})
popup_show({id}) *popup_show()*
If {id} is a hidden popup, show it now.
For {id} see `popup_hide()`.
If {id} is the info popup it will be positioned next to the
current popup menu item.
popup_setoptions({id}, {options}) *popup_setoptions()*
Override options in popup {id} with entries in {options}.
These options can be set:
border
borderchars
borderhighlight
callback
close
cursorline
drag
filter
firstline
flip
highlight
mapping
mask
moved
padding
resize
scrollbar
scrollbarhighlight
thumbhighlight
time
title
wrap
zindex
The options from |popup_move()| can also be used.
For "hidden" use |popup_hide()| and |popup_show()|.
"tabpage" cannot be changed.
Can also be used as a YXXYmethod|:
GetPopup()->popup_setoptions(options)
popup_settext({id}, {text}) *popup_settext()*
Set the text of the buffer in popup win {id}. {text} is the
same as supplied to |popup_create()|, except that a buffer
number is not allowed.
Does not change the window size or position, other than caused
by the different text.
Can also be used as a YXXYmethod|:
GetPopup()->popup_settext('hello')
==============================================================================
3. Usage *popup-usage*
POPUP_CREATE() ARGUMENTS *popup_create-arguments*
The first argument of |popup_create()| (and the second argument to
|popup_settext()|) specifies the text to be displayed, and optionally text
properties. It is in one of four forms:
- a buffer number
- a string
- a list of strings
- a list of dictionaries, where each dictionary has these entries:
text String with the text to display.
props A list of text properties. Optional.
Each entry is a dictionary, like the third argument of
|prop_add()|, but specifying the column in the
dictionary with a "col" entry, see below:
|popup-props|.
If you want to create a new buffer yourself use |bufadd()| and pass the buffer
number to popup_create().
It is not possible to use the buffer of a terminal window. *E278*
The second argument of |popup_create()| is a dictionary with options:
line Screen line where to position the popup. Can use a
number or "cursor", "cursor+1" or "cursor-1" to use
the line of the cursor and add or subtract a number of
lines. If omitted the popup is vertically centered.
The first line is 1.
When using "textprop" the number is relative to the
text property and can be negative.
col Screen column where to position the popup. Can use a
number or "cursor" to use the column of the cursor,
"cursor+9" or "cursor-9" to add or subtract a number
of columns. If omitted the popup is horizontally
centered. The first column is 1.
When using "textprop" the number is relative to the
text property and can be negative.
pos "topleft", "topright", "botleft" or "botright":
defines what corner of the popup "line" and "col" are
used for. When not set "topleft" is used.
Alternatively "center" can be used to position the
popup in the center of the Vim window, in which case
"line" and "col" are ignored.
posinvert When FALSE the value of "pos" is always used. When
TRUE (the default) and the popup does not fit
vertically and there is more space on the other side
then the popup is placed on the other side of the
position indicated by "line".
textprop When present the popup is positioned next to a text
property with this name and will move when the text
property moves. Use an empty string to remove. See
|popup-textprop-pos|.
textpropwin What window to search for the text property. When
omitted or invalid the current window is used.
textpropid Used to identify the text property when "textprop" is
present. Use zero to reset.
fixed When FALSE (the default), and:
- "pos" is "botleft" or "topleft", and
- "wrap" is off, and
- the popup would be truncated at the right edge of
the screen, then
the popup is moved to the left so as to fit the
contents on the screen. Set to TRUE to disable this.
flip When TRUE (the default) and the position is relative
to the cursor, flip to below or above the cursor to
avoid overlap with the |popupmenu-completion| or
another popup with a higher "zindex". When there is
no space above/below the cursor then show the popup to
the side of the popup or popup menu.
{not implemented yet}
maxheight Maximum height of the contents, excluding border and
padding.
minheight Minimum height of the contents, excluding border and
padding.
maxwidth Maximum width of the contents, excluding border,
padding and scrollbar.
minwidth Minimum width of the contents, excluding border,
padding and scrollbar.
firstline First buffer line to display. When larger than one it
looks like the text scrolled up. When out of range
the last buffer line will at the top of the window.
Set to zero to leave the position as set by commands.
Also see "scrollbar".
hidden When TRUE the popup exists but is not displayed; use
`popup_show()` to unhide it.
tabpage When -1: display the popup on all tab pages.
When 0 (the default): display the popup on the current
tab page.
Otherwise the number of the tab page the popup is
displayed on; when invalid the popup is not created
and an error is given. *E997*
title Text to be displayed above the first item in the
popup, on top of any border. If there is no top
border one line of padding is added to put the title
on. You might want to add one or more spaces at the
start and end as padding.
wrap TRUE to make the lines wrap (default TRUE).
drag TRUE to allow the popup to be dragged with the mouse
by grabbing at the border. Has no effect if the
popup does not have a border. As soon as dragging
starts and "pos" is "center" it is changed to
"topleft".
resize TRUE to allow the popup to be resized with the mouse
by grabbing at the bottom right corner. Has no effect
if the popup does not have a border.
close When "button" an X is displayed in the top-right, on
top of any border, padding or text. When clicked on
the X the popup will close. Any callback is invoked
with the value -2.
When "click" any mouse click in the popup will close
it.
When "none" (the default) mouse clicks do not close
the popup window.
highlight Highlight group name to use for the text, stored in
the 'wincolor' option.
padding List with numbers, defining the padding
above/right/below/left of the popup (similar to CSS).
An empty list uses a padding of 1 all around. The
padding goes around the text, inside any border.
Padding uses the 'wincolor' highlight.
Example: [1, 2, 1, 3] has 1 line of padding above, 2
columns on the right, 1 line below and 3 columns on
the left.
border List with numbers, defining the border thickness
above/right/below/left of the popup (similar to CSS).
Only values of zero and non-zero are recognized.
An empty list uses a border all around.
borderhighlight List of highlight group names to use for the border.
When one entry it is used for all borders, otherwise
the highlight for the top/right/bottom/left border.
Example: ['TopColor', 'RightColor', 'BottomColor,
'LeftColor']
borderchars List with characters, defining the character to use
for the top/right/bottom/left border. Optionally
followed by the character to use for the
topleft/topright/botright/botleft corner.
Example: ['-', '|', '-', '|', '┌', '┐', '┘', '└']
When the list has one character it is used for all.
When the list has two characters the first is used for
the border lines, the second for the corners.
By default a double line is used all around when
'encoding' is "utf-8" and 'ambiwidth' is "single",
otherwise ASCII characters are used.
scrollbar non-zero: show a scrollbar when the text doesn't fit.
zero: do not show a scrollbar. Default is non-zero.
Also see |popup-scrollbar|.
scrollbarhighlight Highlight group name for the scrollbar. The
background color is what matters. When not given then
PmenuSbar is used.
thumbhighlight Highlight group name for the scrollbar thumb. The
background color is what matters. When not given then
PmenuThumb is used.
zindex Priority for the popup, default 50. Minimum value is
1, maximum value is 32000.
mask A list of lists with coordinates, defining parts of
the popup that are transparent. See |popup-mask|.
time Time in milliseconds after which the popup will close.
When omitted |popup_close()| must be used.
moved Specifies to close the popup if the cursor moved:
- "any": if the cursor moved at all
- "word": if the cursor moved outside |<cword>|
- "WORD": if the cursor moved outside |<cWORD>|
- "expr": if the cursor moved outside |<cexpr>|
- [{start}, {end}]: if the cursor moved before column
{start} or after {end}
- [{lnum}, {start}, {end}]: if the cursor moved away
from line {lnum}, before column {start} or after
{end}
- [0, 0, 0] do not close the popup when the cursor
moves
The popup also closes if the cursor moves to another
line or to another window.
mousemoved Like "moved" but referring to the mouse pointer
position
cursorline non-zero: Highlight the cursor line. Also scrolls the
text to show this line (only works properly
when 'wrap' is off).
zero: Do not highlight the cursor line.
Default is zero, except for |popup_menu()|.
filter A callback that can filter typed characters, see
|popup-filter|.
mapping Allow for key mapping. When FALSE and the popup is
visible and has a filter callback key mapping is
disabled. Default value is TRUE.
filtermode In which modes the filter is used (same flags as with
|hasmapto()| plus "a"):
n Normal mode
v Visual and Select mode
x Visual mode
s Select mode
o Operator-pending mode
i Insert mode
l Language-Argument ("r", "f", "t", etc.)
c Command-line mode
a all modes
The default value is "a".
callback A callback that is called when the popup closes, e.g.
when using |popup_filter_menu()|, see |popup-callback|.
Depending on the "zindex" the popup goes under or above other popups. The
completion menu (|popup-menu|) has zindex 100. For messages that occur for a
short time the suggestion is to use zindex 1000.
By default text wraps, which causes a line in {lines} to occupy more than one
screen line. When "wrap" is FALSE then the text outside of the popup or
outside of the Vim window will not be displayed, thus truncated.
POPUP TEXT PROPERTIES *popup-props*
These are similar to the third argument of |prop_add()| except:
- "lnum" is always the current line in the list
- "bufnr" is always the buffer of the popup
- "col" is in the Dict instead of a separate argument
So we get:
col starting column, counted in bytes, use one for the
first column.
length length of text in bytes; can be zero
end_lnum line number for the end of the text
end_col column just after the text; not used when "length" is
present; when {col} and "end_col" are equal, this is a
zero-width text property
id user defined ID for the property; when omitted zero is
used
type name of the text property type, as added with
|prop_type_add()|
POSITION POPUP WITH TEXTPROP *popup-textprop-pos*
Positioning a popup next to a text property causes the popup to move when text
is inserted or deleted. The popup functions like a tooltip.
These steps are needed to make this work:
- Define a text property type, it defines the name.
call prop_type_add('popupMarker', {})
- Place a text property at the desired text:
let lnum = {line of the text}
let col = {start column of the text}
let len = {length of the text}
let propId = {arbitrary but unique number}
call prop_add(lnum, col, #{
\ length: len,
\ type: 'popupMarker',
\ id: propId,
\ })
- Create a popup:
let winid = popup_create('the text', #{
\ pos: 'botleft',
\ textprop: 'popupMarker',
\ textpropid: propId,
\ border: [],
\ padding: [0,1,0,1],
\ close: 'click',
\ })
By default the popup is positioned at the corner of the text, opposite of the
"pos" specified for the popup. Thus when the popup uses "botleft", the
bottom-left corner of the popup is positioned next to the top-right corner of
the text property:
+----------+
| the text |
+----------+
just some PROPERTY as an example
Here the text property is on "PROPERTY". Move the popup to the left by
passing a negative "col" value to popup_create(). With "col: -5" you get:
+----------+
| the text |
+----------+
just some PROPERTY as an example
If the text property moves out of view then the popup will be hidden.
If the window for which the popup was defined is closed, the popup is closed.
If the popup cannot fit in the desired position, it may show at a nearby
position.
Some hints:
- To avoid collision with other plugins the text property type name has to be
unique. You can also use the "bufnr" item to make it local to a buffer.
- You can leave out the text property ID if there is only ever one text
property visible.
- The popup may be in the way of what the user is doing, making it close with
a click, as in the example above, helps for that.
- If the text property is removed the popup is closed. Use something like
this:
call prop_remove(#{type: 'popupMarker', id: propId})
POPUP FILTER *popup-filter*
A callback that gets any typed keys while a popup is displayed. The filter is
not invoked when the popup is hidden.
The filter can return TRUE to indicate the key has been handled and is to be
discarded, or FALSE to let Vim handle the key as usual in the current state.
In case it returns FALSE and there is another popup window visible, that
filter is also called. The filter of the popup window with the highest zindex
is called first.
The filter function is called with two arguments: the ID of the popup and the
key as a string, e.g.:
func MyFilter(winid, key)
if a:key == "\<F2>"
" do something
return 1
endif
if a:key == 'x'
call popup_close(a:winid)
return 1
endif
return 0
endfunc
*popup-filter-mode*
The "filtermode" property can be used to specify in what mode the filter is
invoked. The default is "a": all modes. When using "nvi" Command-line mode
is not included, so that any command typed on the command line is not
filtered. However, to get to Command-line mode the filter must not consume
":". Just like it must not consume "v" to allow for entering Visual mode.
*popup-mapping*
Normally the key is what results after any mapping, since the keys pass on as
normal input if the filter does not use it. If the filter consumes all the
keys, set the "mapping" property to zero so that mappings do not get in the
way. This is default for |popup_menu()| and |popup_dialog()|.
Some recommended key actions:
x close the popup (see note below)
cursor keys select another entry
Tab accept current suggestion
A mouse click arrives as <LeftMouse>. The coordinates can be obtained with
|getmousepos()|.
Vim provides standard filters |popup_filter_menu()| and
|popup_filter_yesno()|.
Note that "x" is the normal way to close a popup. You may want to use Esc,
but since many keys start with an Esc character, there may be a delay before
Vim recognizes the Esc key. If you do use Esc, it is recommended to set the
'ttimeoutlen' option to 100 and set 'timeout' and/or 'ttimeout'.
POPUP CALLBACK *popup-callback*
A callback that is invoked when the popup closes.
The callback is invoked with two arguments: the ID of the popup window and the
result, which could be an index in the popup lines, or whatever was passed as
the second argument of `popup_close()`.
If the popup is force-closed, e.g. because the cursor moved or CTRL-C was
pressed, the number -1 is passed to the callback.
Example:
func SelectedColor(id, result)
echo 'choice made: ' .. a:result
endfunc
POPUP SCROLLBAR *popup-scrollbar*
If the text does not fit in the popup a scrollbar is displayed on the right of
the window. This can be disabled by setting the "scrollbar" option to zero.
When the scrollbar is displayed mouse scroll events, while the mouse pointer
is on the popup, will cause the text to scroll up or down as you would expect.
A click in the upper half of the scrollbar will scroll the text down one line.
A click in the lower half will scroll the text up one line. However, this is
limited so that the popup does not get smaller.
POPUP MASK *popup-mask*
To minimize the text that the popup covers, parts of it can be made
transparent. This is defined by a "mask" which is a list of lists, where each
list has four numbers:
col start column, positive for counting from the left, 1 for
leftmost, negative for counting from the right, -1 for
rightmost
endcol last column, like "col"
line start line, positive for counting from the top, 1 for top,
negative for counting from the bottom, -1 for bottom
endline end line, like "line"
For example, to make the last 10 columns of the last line transparent:
[[-10, -1, -1, -1]]
To make the four corners transparent:
[[1, 1, 1, 1], [-1, -1, 1, 1], [1, 1, -1, -1], [-1, -1, -1, -1]]
==============================================================================
4. Examples *popup-examples*
TODO: more interesting examples
*popup_dialog-example*
Prompt the user to press y/Y or n/N:
func MyDialogHandler(id, result)
if a:result
" ... 'y' or 'Y' was pressed
endif
endfunc
call popup_dialog('Continue? y/n', #{
\ filter: 'popup_filter_yesno',
\ callback: 'MyDialogHandler',
\ })
*popup_menu-shortcut-example*
Extend popup_filter_menu() with shortcut keys:
call popup_menu(['Save', 'Cancel', 'Discard'], #{
\ filter: 'MyMenuFilter',
\ callback: 'MyMenuHandler',
\ })
func MyMenuFilter(id, key)
" Handle shortcuts
if a:key == 'S'
call popup_close(a:id, 1)
return 1
endif
if a:key == 'C'
call popup_close(a:id, 2)
return 1
endif
if a:key == 'D'
call popup_close(a:id, 3)
return 1
endif
" No shortcut, pass to generic filter
return popup_filter_menu(a:id, a:key)
endfunc
*popup_beval_example*
Example for using a popup window for 'ballooneval':
set ballooneval balloonevalterm
set balloonexpr=BalloonExpr()
let s:winid = 0
let s:last_text = ''
func BalloonExpr()
if s:winid && popup_getpos(s:winid) != {}
" previous popup window still shows
if v:beval_text == s:last_text
" Still the same text, keep the existing popup
return ''
endif
call popup_close(s:winid)
endif
let s:winid = popup_beval(v:beval_text, #{mousemoved: 'word'})
let s:last_text = v:beval_text
return ''
endfunc
If the text has to be obtained asynchronously return an empty string from the
expression function and call popup_beval() once the text is available. In
this example simulated with a timer callback:
set ballooneval balloonevalterm
set balloonexpr=BalloonExpr()
let s:winid = 0
let s:balloonText = ''
func BalloonExpr()
if s:winid && popup_getpos(s:winid) != {}
" previous popup window still shows
if v:beval_text == s:balloonText
" Still the same text, keep the existing popup
return ''
endif
call popup_close(s:winid)
let s:winid = 0
endif
" simulate an asynchronous lookup for the text to display
let s:balloonText = v:beval_text
call timer_start(100, 'ShowPopup')
return ''
endfunc
func ShowPopup(id)
let s:winid = popup_beval(s:balloonText, #{mousemoved: 'word'})
endfunc
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