*popup.txt* For Vim version 8.2. Last change: 2020 Feb 20
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|
Terminal in popup window |popup-terminal|
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=lightbluecall 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. TERMINAL IN POPUP WINDOW *popup-terminal* A special case is running a terminal in a popup window. Many rules are then different: *E863* - The popup window always has focus, it is not possible to switch to another window. - When the job ends, the popup window closes. - The popup window can be closed with `popup_close()`, the terminal buffer then becomes hidden. - The default Pmenu color is only used for the border and padding. To change the color of the terminal itself set 'wincolor'. To run a terminal in a popup window, first create the terminal hidden. Then pass the buffer number to popup_create(). Example:let buf = term_start(['picker', 'Something'], #{hidden: 1, term_finish: 'close'})let winid = popup_create(buf, #{minwidth: 50, minheight: 20})set wincolor=Search
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 |method|: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 |method|: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 |method|: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 |method|: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 |method|: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 EscCTRL-Ccancel 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-Cinvokes 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 |method|: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 hiddenNotethat 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 |method|: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* If popup window{id}contains a terminal an error is given. Can also be used as a |method|: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:resultendfunccall popup_menu(['red', 'green', 'blue'], #{\ callback: 'ColorSelected',\ })< Can also be used as a |method|: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 |method|: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 |method|: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 |method|: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 |method|: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 somethingreturn 1endifif a:key == 'x'call popup_close(a:winid)return 1endifreturn 0endfunc*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 (seenotebelow) 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()|.Notethat "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 orCTRL-Cwas pressed, the number -1 is passed to the callback. Example:func SelectedColor(id, result)echo 'choice made: ' .. a:resultendfuncPOPUP 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 pressedendifendfunccall 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 shortcutsif a:key == 'S'call popup_close(a:id, 1)return 1endifif a:key == 'C'call popup_close(a:id, 2)return 1endifif a:key == 'D'call popup_close(a:id, 3)return 1endif" No shortcut, pass to generic filterreturn popup_filter_menu(a:id, a:key)endfunc*popup_beval_example* Example for using a popup window for 'ballooneval':set ballooneval balloonevaltermset balloonexpr=BalloonExpr()let s:winid = 0let s:last_text = ''func BalloonExpr()if s:winid && popup_getpos(s:winid) !={}" previous popup window still showsif v:beval_text == s:last_text" Still the same text, keep the existing popupreturn ''endifcall popup_close(s:winid)endiflet s:winid = popup_beval(v:beval_text, #{mousemoved: 'word'})let s:last_text = v:beval_textreturn ''endfuncIf 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 balloonevaltermset balloonexpr=BalloonExpr()let s:winid = 0let s:balloonText = ''func BalloonExpr()if s:winid && popup_getpos(s:winid) !={}" previous popup window still showsif v:beval_text == s:balloonText" Still the same text, keep the existing popupreturn ''endifcall popup_close(s:winid)let s:winid = 0endif" simulate an asynchronous lookup for the text to displaylet s:balloonText = v:beval_textcall timer_start(100, 'ShowPopup')return ''endfuncfunc ShowPopup(id)let s:winid = popup_beval(s:balloonText, #{mousemoved: 'word'})endfuncvim:tw=78:ts=8:noet:ft=help:norl:
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