Mercurial > vim
annotate runtime/doc/popup.txt @ 16853:e6bcccccbf7b v8.1.1428
patch 8.1.1428: popup_atcursor() not implemented yet
commit https://github.com/vim/vim/commit/cc31ad9f9b601d53926b96586bd6b40602d57951
Author: Bram Moolenaar <Bram@vim.org>
Date: Thu May 30 19:25:06 2019 +0200
patch 8.1.1428: popup_atcursor() not implemented yet
Problem: Popup_atcursor() not implemented yet.
Solution: Implement it. (Yasuhiro Matsumoto, closes https://github.com/vim/vim/issues/4456)
author | Bram Moolenaar <Bram@vim.org> |
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date | Thu, 30 May 2019 19:30:03 +0200 |
parents | cf630fab9fb6 |
children | 19162ff4eacd |
rev | line source |
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16808 | 1 *popup.txt* For Vim version 8.1. Last change: 2019 May 26 |
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2 |
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4 VIM REFERENCE MANUAL by Bram Moolenaar |
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5 |
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6 |
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7 Displaying text in floating window. *popup* *popup-window* |
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8 |
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9 THIS IS UNDER DESIGN - ANYTHING MAY STILL CHANGE |
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10 |
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11 1. Introduction |popup-intro| |
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12 2. Functions |popup-functions| |
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13 3. Examples |popup-examples| |
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14 |
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15 |
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16 {not available if the |+eval| feature was disabled at compile time} |
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17 {not able to use text properties if the |+textprop| feature was disabled at |
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18 compile time} |
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19 |
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20 ============================================================================== |
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21 1. Introduction *popup-intro* |
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22 |
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23 We are talking about popup windows here, text that goes on top of the regular |
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24 windows and is under control of a plugin. You cannot edit the text in the |
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25 popup window like with regular windows. |
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26 |
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27 A popup window can be used for such things as: |
16808 | 28 - briefly show a message without overwriting the command line |
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29 - prompt the user with a dialog |
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30 - display contextual information while typing |
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31 - give extra information for auto-completion |
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32 |
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33 The text in the popup window can be colored with |text-properties|. It is |
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34 also possible to use syntax highlighting. |
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35 |
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36 The default color used is "Pmenu". If you prefer something else use the |
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37 "highlight" argument or the 'wincolor' option, e.g.: > |
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38 hi MyPopupColor ctermbg=lightblue guibg=lightblue |
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39 call setwinvar(winid, '&wincolor', 'MyPopupColor') |
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40 |
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41 'hlsearch' and match highlighting are not displayed in a popup window. |
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42 |
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43 A popup window has a window-ID like other windows, but behaves differently. |
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44 The size can be up to the whole Vim window and it overlaps other windows. |
16808 | 45 Popup windows can also overlap each other. |
46 | |
47 The popup window contains a buffer, and that buffer is always associated with | |
48 the popup window. The window cannot be used in Normal, Visual or Insert mode, | |
49 it does not get keyboard focus. You can use functions like `setbufline()` to | |
50 change the text in the buffer. There are more differences from how this | |
51 window and buffer behave compared to regular windows and buffers, see | |
52 |popup-buffer|. | |
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53 |
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54 If this is not what you are looking for, check out other popup functionality: |
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55 - popup menu, see |popup-menu| |
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56 - balloon, see |balloon-eval| |
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57 |
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58 |
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59 WINDOW POSITION AND SIZE *popup-position* |
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60 |
16808 | 61 The height of the window is normally equal to the number of, possibly |
62 wrapping, lines in the buffer. It can be limited with the "maxheight" | |
63 property. You can use empty lines to increase the height. | |
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64 |
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65 The width of the window is normally equal to the longest line in the buffer. |
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66 It can be limited with the "maxwidth" property. You can use spaces to |
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67 increase the width. |
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68 |
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69 By default the 'wrap' option is set, so that no text disappears. However, if |
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70 there is not enough space, some text may be invisible. |
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71 |
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72 |
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73 |
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74 TODO: |
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75 |
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76 Example how to use syntax highlighting of a code snippet. |
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77 |
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78 Scrolling: When the screen scrolls up for output of an Ex command, what |
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79 happens with popups? |
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80 1. Stay where they are. Problem: listed text may go behind and can't be read. |
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81 2. Scroll with the page. What if they get updated? Either postpone, or take |
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82 the scroll offset into account. |
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83 Probably 2. is the best choice. |
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84 |
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85 |
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86 IMPLEMENTATION: |
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87 - Code is in popupwin.c |
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88 - Implement the "pos" option. |
16808 | 89 - Implement filter. |
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90 Check that popup_close() works in the filter. |
16808 | 91 - Handle screen resize in screenalloc(). |
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92 - show [Popup] instead of [Scratch] in ":ls!" |
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93 - Make redrawing more efficient and avoid flicker. |
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94 Store popup info in a mask, use the mask in screen_line() |
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95 Fix redrawing problem with completion. |
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96 Fix redrawing problem when scrolling non-current window |
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97 Fix redrawing the statusline on top of a popup |
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98 - Figure out the size and position better. |
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99 if wrapping splits a double-wide character |
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100 if wrapping inserts indent |
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101 - Can the buffer be re-used, to avoid using up lots of buffer numbers? |
16808 | 102 - Implement all the unimplemented options and features. |
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103 |
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104 |
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105 ============================================================================== |
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106 2. Functions *popup-functions* |
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107 |
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108 THIS IS UNDER DESIGN - ANYTHING MAY STILL CHANGE |
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109 |
16808 | 110 [functions to be moved to eval.txt later, keep overview of functions here] |
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111 |
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112 popup_create({text}, {options}) *popup_create()* |
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113 Open a popup window showing {text}, which is either: |
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114 - a string |
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115 - a list of strings |
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116 - a list of text lines with text properties |
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117 {not implemented yet} |
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118 {options} is a dictionary with many possible entries. |
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119 See |popup_create-usage| for details. |
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120 |
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121 Returns a window-ID, which can be used with other popup |
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122 functions. Use `winbufnr()` to get the number of the buffer |
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123 in the window: > |
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124 let winid = popup_create('hello', {}) |
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125 let bufnr = winbufnr(winid) |
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126 call setbufline(bufnr, 2, 'second line') |
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127 < In case of failure zero is returned. |
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128 |
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129 |
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130 popup_close({id}) *popup_close()* |
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131 Close popup {id}. The window and the associated buffer will |
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132 be deleted. |
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133 |
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134 |
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135 popup_dialog({text}, {options}) *popup_dialog()* |
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136 {not implemented yet} |
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137 Just like |popup_create()| but with these default options: > |
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138 call popup_create({text}, { |
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139 \ 'pos': 'center', |
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140 \ 'zindex': 200, |
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141 \ 'border': [], |
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142 \}) |
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143 < Use {options} to change the properties. |
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144 |
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145 |
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146 popup_notification({text}, {options}) *popup_notification()* |
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147 {not implemented yet} |
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148 Show the {text} for 3 seconds at the top of the Vim window. |
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149 This works like: > |
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150 call popup_create({text}, { |
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151 \ 'line': 1, |
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152 \ 'col': 10, |
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153 \ 'time': 3000, |
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154 \ 'tab': -1, |
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155 \ 'zindex': 200, |
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156 \ 'highlight': 'WarningMsg', |
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157 \ 'border': [], |
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158 \ }) |
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159 < Use {options} to change the properties. |
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160 |
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161 |
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162 popup_atcursor({text}, {options}) *popup_atcursor()* |
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163 Show the {text} above the cursor, and close it when the cursor |
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164 moves. This works like: > |
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165 call popup_create({text}, { |
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166 \ 'pos': 'botleft', |
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167 \ 'line': 'cursor-1', |
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168 \ 'col': 'cursor', |
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169 \ 'moved': 'WORD', |
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170 \ }) |
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171 < Use {options} to change the properties. |
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172 |
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173 |
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174 popup_menu({text}, {options}) *popup_menu()* |
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175 {not implemented yet} |
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176 Show the {text} near the cursor, handle selecting one of the |
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177 items with cursorkeys, and close it an item is selected with |
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178 Space or Enter. {text} should have multiple lines to make this |
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179 useful. This works like: > |
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180 call popup_create({text}, { |
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181 \ 'pos': 'center', |
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182 \ 'zindex': 200, |
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183 \ 'wrap': 0, |
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184 \ 'border': [], |
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185 \ 'filter': 'popup_filter_menu', |
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186 \ }) |
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187 < Use {options} to change the properties. Should at least set |
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188 "callback" to a function that handles the selected item. |
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189 |
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190 |
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191 popup_hide({id}) *popup_hide()* |
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192 If {id} is a displayed popup, hide it now. If the popup has a |
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193 filter it will not be invoked for so long as the popup is |
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194 hidden. |
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195 If window {id} does not exist nothing happens. If window {id} |
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196 exists but is not a popup window an error is given. *E993* |
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197 |
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198 popup_show({id}) *popup_show()* |
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199 If {id} is a hidden popup, show it now. |
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200 For {id} see `popup_hide()`. |
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201 |
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202 popup_move({id}, {options}) *popup_move()* |
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203 Move popup {id} to the position speficied with {options}. |
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204 {options} may contain the items from |popup_create()| that |
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205 specify the popup position: "line", "col", "pos", "maxheight", |
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206 "minheight", "maxwidth" and "minwidth". |
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207 For {id} see `popup_hide()`. |
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208 |
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209 |
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210 popup_filter_menu({id}, {key}) *popup_filter_menu()* |
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211 {not implemented yet} |
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212 Filter that can be used for a popup. It handles the cursor |
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213 keys to move the selected index in the popup. Space and Enter |
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214 can be used to select an item. Invokes the "callback" of the |
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215 popup menu with the index of the selected line as the second |
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216 argument. |
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217 |
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218 |
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219 popup_filter_yesno({id}, {key}) *popup_filter_yesno()* |
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220 {not implemented yet} |
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221 Filter that can be used for a popup. It handles only the keys |
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222 'y', 'Y' and 'n' or 'N'. Invokes the "callback" of the |
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223 popup menu with the 1 for 'y' or 'Y' and zero for 'n' or 'N' |
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224 as the second argument. Pressing Esc and CTRL-C works like |
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225 pressing 'n'. |
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226 |
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227 |
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228 popup_setoptions({id}, {options}) *popup_setoptions()* |
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229 {not implemented yet} |
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230 Override options in popup {id} with entries in {options}. |
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231 |
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232 |
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233 popup_getoptions({id}) *popup_getoptions()* |
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234 Return the {options} for popup {id} in a Dict. |
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235 A zero value means the option was not set. |
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236 |
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237 The "highlight" entry is omitted, use the 'wincolor' option |
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238 for that: > |
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239 let hl = getwinvar(winid, '&wincolor') |
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240 |
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241 < If popup window {id} is not found an empty Dict is returned. |
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242 |
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243 popup_getposition({id}) *popup_getposition()* |
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244 Return the position and size of popup {id}. Returns a Dict |
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245 with these entries: |
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246 col screen column of the popup, one-based |
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247 line screen line of the popup, one-based |
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248 width width of the popup in screen cells |
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249 height height of the popup in screen cells |
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250 visible one if the popup is displayed, zero if hidden |
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251 Note that these are the actual screen positions. They differ |
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252 from the values in `popup_getoptions()` for the sizing and |
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253 positioning mechanism applied. |
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254 If popup window {id} is not found an empty Dict is returned. |
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255 |
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256 |
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257 *:popupclear* *:popupc* |
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258 :popupc[lear] Emergency solution to a misbehaving plugin: close all popup |
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259 windows. |
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260 |
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261 |
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262 POPUP BUFFER AND WINDOW *popup-buffer* |
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263 |
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264 A new buffer is created to hold the text and text properties of the popup |
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265 window. The buffer is always associated with the popup window and |
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266 manipulation is restricted: |
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267 - the buffer has no name |
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268 - 'buftype' is "popup" |
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269 - 'swapfile' is off |
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270 - 'bufhidden' is "hide" |
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271 - 'buflisted' is off |
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272 - 'undolevels' is -1: no undo at all |
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273 - all other buffer-local and window_local options are set to their Vim default |
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274 value. |
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275 |
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276 It is possible to change the specifically mentioned options, but anything |
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277 might break then, so better leave them alone. |
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279 The window does have a cursor position, but the cursor is not displayed. |
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280 |
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281 To execute a command in the context of the popup window and buffer use |
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282 `win_execute()`. Example: > |
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283 call win_execute(winid, 'syntax enable') |
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284 |
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285 Options can be set on the window with `setwinvar()`, e.g.: > |
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286 call setwinvar(winid, '&wrap', 0) |
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287 And options can be set on the buffer with `setbufvar()`, e.g.: > |
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288 call setbufvar(winbufnr(winid), '&filetype', 'java') |
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289 |
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290 |
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291 POPUP_CREATE() ARGUMENTS *popup_create-usage* |
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292 |
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293 The first argument of |popup_create()| specifies the text to be displayed, and |
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294 optionally text properties. It is in one of three forms: |
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295 - a string |
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296 - a list of strings |
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297 - a list of dictionaries, where each dictionary has these entries: |
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298 text String with the text to display. |
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299 props A list of text properties. Optional. |
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300 Each entry is a dictionary, like the third argument of |
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301 |prop_add()|, but specifying the column in the |
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302 dictionary with a "col" entry, see below: |
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303 |popup-props|. |
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304 |
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305 The second argument of |popup_create()| is a dictionary with options: |
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306 line screen line where to position the popup; can use |
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307 "cursor", "cursor+1" or "cursor-1" to use the line of |
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308 the cursor and add or subtract a number of lines; |
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309 default is "cursor-1". |
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310 col screen column where to position the popup; can use |
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311 "cursor" to use the column of the cursor, "cursor+99" |
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312 and "cursor-99" to add or subtract a number of |
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313 columns; default is "cursor" |
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314 pos "topleft", "topright", "botleft" or "botright": |
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315 defines what corner of the popup "line" and "col" are |
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316 used for. When not set "topleft" is used. |
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317 Alternatively "center" can be used to position the |
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318 popup in the center of the Vim window. |
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319 {not implemented yet} |
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320 flip when TRUE (the default) and the position is relative |
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321 to the cursor, flip to below or above the cursor to |
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322 avoid overlap with the |popupmenu-completion| or |
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323 another popup with a higher "zindex" |
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324 {not implemented yet} |
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325 maxheight maximum height |
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326 minheight minimum height |
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327 maxwidth maximum width |
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328 minwidth minimum width |
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329 hidden when TRUE the popup exists but is not displayed; use |
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330 `popup_show()` to unhide it. |
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331 {not implemented yet} |
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332 tab when -1: display the popup on all tabs; when 0 (the |
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333 default): display the popup on the current tab; |
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334 otherwise the number of the tab page the popup is |
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335 displayed on; when invalid the current tab is used |
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336 {only -1 and 0 are implemented} |
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337 title text to be displayed above the first item in the |
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338 popup, on top of any border |
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339 {not implemented yet} |
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340 wrap TRUE to make the lines wrap (default TRUE) |
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341 {not implemented yet} |
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342 highlight highlight group name to use for the text, stored in |
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343 the 'wincolor' option |
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344 padding list with numbers, defining the padding |
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345 above/right/below/left of the popup (similar to CSS); |
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346 an empty list uses a padding of 1 all around; the |
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347 padding goes around the text, inside any border; |
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348 padding uses the 'wincolor' highlight; Example: [1, 2, |
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349 1, 3] has 1 line of padding above, 2 columns on the |
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350 right, 1 line below and 3 columns on the left |
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351 {not implemented yet} |
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352 border list with numbers, defining the border thickness |
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353 above/right/below/left of the popup (similar to CSS); |
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354 an empty list uses a border of 1 all around |
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355 {not implemented yet} |
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356 borderhighlight highlight group name to use for the border |
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357 {not implemented yet} |
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358 borderchars list with characters, defining the character to use |
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359 for the top/right/bottom/left border; optionally |
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360 followed by the character to use for the |
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361 topright/botright/botleft/topleft corner; an empty |
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362 list can be used to show a double line all around |
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363 {not implemented yet} |
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364 zindex priority for the popup, default 50 |
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365 time time in milliseconds after which the popup will close; |
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366 when omitted |popup_close()| must be used. |
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367 moved "cell": close the popup if the cursor moved at least |
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368 one screen cell; "word" allows for moving within |
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369 |<cword>|, "WORD" allows for moving within |<cWORD>|, |
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370 a list with two numbers specifies the start and end |
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371 column |
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372 {not implemented yet} |
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373 filter a callback that can filter typed characters, see |
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374 |popup-filter| |
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375 {not implemented yet} |
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376 callback a callback to be used when the popup closes, e.g. when |
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377 using |popup_filter_menu()|, see |popup-callback|. |
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378 {not implemented yet} |
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379 |
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380 Depending on the "zindex" the popup goes under or above other popups. The |
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381 completion menu (|popup-menu|) has zindex 100. For messages that occur for a |
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382 short time the suggestion is to use zindex 1000. |
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383 |
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384 By default text wraps, which causes a line in {lines} to occupy more than one |
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385 screen line. When "wrap" is FALSE then the text outside of the popup or |
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386 outside of the Vim window will not be displayed, thus truncated. |
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387 |
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388 |
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389 POPUP TEXT PROPERTIES *popup-props* |
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390 |
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391 These are similar to the third argument of |prop_add()| except: |
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392 - "lnum" is always the current line in the list |
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393 - "bufnr" is always the buffer of the popup |
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394 - "col" is in the Dict instead of a separate argument |
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395 - "transparent" is extra |
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396 So we get: |
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397 col starting column, counted in bytes, use one for the |
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398 first column. |
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399 length length of text in bytes; can be zero |
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400 end_lnum line number for the end of the text |
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401 end_col column just after the text; not used when "length" is |
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402 present; when {col} and "end_col" are equal, this is a |
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403 zero-width text property |
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404 id user defined ID for the property; when omitted zero is |
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405 used |
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406 type name of the text property type, as added with |
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407 |prop_type_add()| |
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408 transparent do not show these characters, show the text under it; |
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409 if there is an border character to the right or below |
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410 it will be made transparent as well |
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411 {not implemented yet} |
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412 |
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413 |
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414 POPUP FILTER *popup-filter* |
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415 |
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416 {not implemented yet} |
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417 A callback that gets any typed keys while a popup is displayed. The filter is |
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418 not invoked when the popup is hidden. |
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419 |
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420 The filter can return TRUE to indicate the key has been handled and is to be |
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421 discarded, or FALSE to let Vim handle the key as usual in the current state. |
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422 In case it returns FALSE and there is another popup window visible, that |
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423 filter is also called. The filter of the popup window with the highest zindex |
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424 is called first. |
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425 |
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426 The filter function is called with two arguments: the ID of the popup and the |
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427 key. |
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428 |
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429 Some common key actions: |
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430 Esc close the popup |
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431 cursor keys select another entry |
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432 Tab accept current suggestion |
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433 |
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434 A mouse click arrives as <LeftMouse>. The coordinates are in |
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435 v:mouse_popup_col and v:mouse_popup_row. The top-left screen cell of the |
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436 popup is col 1, row 1 (not counting the border). |
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437 |
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438 Vim provides standard filters |popup_filter_menu()| and |
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439 |popup_filter_yesno()|. |
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440 |
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441 |
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442 POPUP CALLBACK *popup-callback* |
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443 |
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444 {not implemented yet} |
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445 A callback that is invoked when the popup closes. Used by |
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446 |popup_filter_menu()|. Invoked with two arguments: the ID of the popup and |
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447 the result, which would usually be an index in the popup lines, or whatever |
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448 the filter wants to pass. |
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449 |
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450 ============================================================================== |
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451 3. Examples *popup-examples* |
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452 |
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453 TODO |
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454 |
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455 Prompt the user to press y/Y or n/N: > |
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456 |
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457 func MyDialogHandler(id, result) |
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458 if a:result |
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459 " ... 'y' or 'Y' was pressed |
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460 endif |
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461 endfunc |
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462 |
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463 call popup_create(['Continue? y/n'], { |
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464 \ 'filter': 'popup_filter_yesno', |
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465 \ 'callback': 'MyDialogHandler', |
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466 \ }) |
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467 < |
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468 |
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469 vim:tw=78:ts=8:noet:ft=help:norl: |