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annotate runtime/doc/popup.txt @ 16654:7d54a66c95d7 v8.1.1329

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patch 8.1.1329: plans for popup window support are spread out commit https://github.com/vim/vim/commit/957f85d54ebd5a3bd0d930de9603190f0876f977 Author: Bram Moolenaar <Bram@vim.org> Date: Sun May 12 21:43:48 2019 +0200 patch 8.1.1329: plans for popup window support are spread out Problem: Plans for popup window support are spread out. Solution: Add a first version of the popup window help.
author Bram Moolenaar <Bram@vim.org>
date Sun, 12 May 2019 21:45:05 +0200
parents
children 6030631a1541
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16654
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1 *popup.txt* For Vim version 8.1. Last change: 2019 May 12
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2
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3
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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 with properties attached. *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 able to use text properties when the |+textprop| feature was
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17 disabled at compile time}
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18
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19 ==============================================================================
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20 1. Introduction *popup-intro*
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21
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22 We are talking about popup windows here, text that goes on top of the buffer
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23 text and is under control of a plugin. Other popup functionality:
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24 - popup menu, see |popup-menu|
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25 - balloon, see |balloon-eval|
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26
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27 TODO
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28
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29 ==============================================================================
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30 2. Functions *popup-functions*
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31
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32 THIS IS UNDER DESIGN - ANYTHING MAY STILL CHANGE
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33
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34 Proposal and discussion on issue #4063: https://github.com/vim/vim/issues/4063
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35
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36 [to be moved to eval.txt later]
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37
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38 popup_show({lines}, {options}) *popup_show()*
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39 Open a popup window showing {lines}, which is a list of lines,
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40 where each line has text and text properties.
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41
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42 {options} is a dictionary with many possible entries.
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43
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44 Returns a unique ID to be used with |popup_close()|.
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45
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46 See |popup_show-usage| for details.
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47
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48
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49 popup_dialog({lines}, {options}) *popup_dialog()*
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50 Just like |popup_show()| but with different default options:
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51 pos "center"
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52 zindex 200
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53 border []
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54
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55
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56 popup_notification({text}, {options}) *popup_notification()*
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57 Show the string {text} for 3 seconds at the top of the Vim
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58 window. This works like: >
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59 call popup_show([{'text': {text}}], {
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60 \ 'line': 1,
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61 \ 'col': 10,
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62 \ 'time': 3000,
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63 \ 'zindex': 200,
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64 \ 'highlight': 'WarningMsg',
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65 \ 'border: [],
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66 \ })
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67 < Use {options} to change the properties.
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68
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69 popup_atcursor({text}, {options}) *popup_atcursor()*
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70 Show the string {text} above the cursor, and close it when the
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71 cursor moves. This works like: >
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72 call popup_show([{'text': {text}}], {
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73 \ 'line': 'cursor-1',
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74 \ 'col': 'cursor',
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75 \ 'zindex': 50,
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76 \ 'moved': 'WORD',
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77 \ })
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78 < Use {options} to change the properties.
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79
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80
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81 popup_menu({lines}, {options}) *popup_atcursor()*
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82 Show the {lines} near the cursor, handle selecting one of the
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83 items with cursorkeys, and close it an item is selected with
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84 Space or Enter. This works like: >
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85 call popup_show({lines}, {
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86 \ 'pos': 'center',
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87 \ 'zindex': 200,
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88 \ 'wrap': 0,
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89 \ 'border': [],
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90 \ 'filter': 'popup_filter_menu',
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91 \ })
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92 < Use {options} to change the properties. Should at least set
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93 "callback" to a function that handles the selected item.
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94
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95
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96 popup_move({id}, {options}) *popup_move()*
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97 Move popup {id} to the position speficied with {options}.
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98 {options} may contain the items from |popup_show()| that
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99 specify the popup position: "line", "col", "pos", "maxheight",
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100 "minheight", "maxwidth" and "minwidth".
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101
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102
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103 popup_filter_menu({id}, {key}) *popup_filter_menu()*
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104 Filter that can be used for a popup. It handles the cursor
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105 keys to move the selected index in the popup. Space and Enter
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106 can be used to select an item. Invokes the "callback" of the
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107 popup menu with the index of the selected line as the second
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108 argument.
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109
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110
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111 popup_filter_yesno({id}, {key}) *popup_filter_yesno()*
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112 Filter that can be used for a popup. It handles only the keys
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113 'y', 'Y' and 'n' or 'N'. Invokes the "callback" of the
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114 popup menu with the 1 for 'y' or 'Y' and zero for 'n' or 'N'
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115 as the second argument. Pressing Esc and CTRL-C works like
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116 pressing 'n'.
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117
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118
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119 popup_setlines({id}, {lnum}, {lines}) *popup_setlines()*
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120 In popup {id} set line {lnum} and following to {lines}.
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121
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122 {lnum} is one-based and must be either an existing line or
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123 just one below the last line, in which case the line gets
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124 appended.
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125
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126 {lines} has the same format as one item in {lines} of
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127 |popup_show()|. Existing lines are replaced. When {lines}
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128 extends below the last line of the popup lines are appended.
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129
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130 popup_getlines({id}) *popup_getlines()*
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131 Return the {lines} for popup {id}.
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132
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133
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134 popup_setoptions({id}, {options}) *popup_setoptions()*
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135 Override options in popup {id} with entries in {options}.
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136
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137
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138 popup_getoptions({id}) *popup_getoptions()*
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139 Return the {options} for popup {id}.
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140
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141
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142 popup_close({id}) *popup_close()*
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143 Close popup {id}.
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144
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145
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146 POPUP_SHOW() ARGUMENTS *popup_show-usage*
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147
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148 The first argument of |popup_show()| is a list of text lines. Each item in
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149 the list is a dictionary with these entries:
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150 text The text to display.
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151 props A list of text properties. Optional.
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152 Each entry is a dictionary, like the third argument of
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153 |prop_add()|, but specifying the column in the
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154 dictionary with a "col" entry, see below:
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155 |popup-props|.
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156
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157 The second argument of |popup_show()| is a dictionary with options:
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158 line screen line where to position the popup; can use
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159 "cursor", "cursor+1" or "cursor-1" to use the line of
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160 the cursor and add or subtract a number of lines;
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161 default is "cursor-1".
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162 col screen column where to position the popup; can use
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163 "cursor" to use the column of the cursor, "cursor+99"
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164 and "cursor-99" to add or subtract a number of
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165 columns; default is "cursor"
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166 pos "topleft", "topright", "botleft" or "botright":
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167 defines what corner of the popup "line" and "col" are
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168 used for. Default is "botleft". Alternatively
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169 "center" can be used to position the popup somewhere
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170 near the cursor.
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171 maxheight maximum height
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172 minheight minimum height
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173 maxwidth maximum width
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174 minwidth minimum width
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175 title text to be displayed above the first item in the
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176 popup, on top of any border
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177 wrap TRUE to make the lines wrap (default TRUE)
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178 highlight highlight group name to use for the text, defines the
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179 background and foreground color
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180 border list with numbers, defining the border thickness
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181 above/right/below/left of the popup; an empty list
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182 uses a border of 1 all around
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183 borderhighlight highlight group name to use for the border
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184 borderchars list with characters, defining the character to use
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185 for the top/right/bottom/left border; optionally
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186 followed by the character to use for the
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187 topright/botright/botleft/topleft corner; an empty
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188 list can be used to show a double line all around
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189 zindex priority for the popup, default 50
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190 time time in milliseconds after which the popup will close;
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191 when omitted |popup_close()| must be used.
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192 moved "cell": close the popup if the cursor moved at least
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193 one screen cell; "word" allows for moving within
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194 |<cword>|, "WORD" allows for moving within |<cWORD>|,
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195 a list with two numbers specifies the start and end
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196 column
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197 filter a callback that can filter typed characters, see
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198 |popup-filter|
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199 callback a callback to be used when the popup closes, e.g. when
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200 using |popup_filter_menu()|, see |popup-callback|.
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201
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202 Depending on the "zindex" the popup goes under or above other popups. The
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203 completion menu (|popup-menu|) has zindex 100. For messages that occur for a
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204 short time the suggestion is to use zindex 1000.
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205
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206 By default text wraps, which causes a line in {lines} to occupy more than one
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207 screen line. When "wrap" is FALSE then the text outside of the popup or
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208 outside of the Vim window will not be displayed, thus truncated.
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209
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210
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211 POPUP TEXT PROPERTIES *popup-props*
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212
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213 These are similar to the third argument of |prop_add()|, but not exactly the
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214 same, since they only apply to one line.
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215 col starting column, counted in bytes, use one for the
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216 first column.
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217 length length of text in bytes; can be zero
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218 end_col column just after the text; not used when "length" is
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219 present; when {col} and "end_col" are equal, this is a
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220 zero-width text property
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221 id user defined ID for the property; when omitted zero is
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222 used
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223 type name of the text property type, as added with
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224 |prop_type_add()|
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225 transparent do not show these characters, show the text under it;
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226 if there is an border character to the right or below
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227 it will be made transparent as well
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228
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229
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230 POPUP FILTER *popup-filter*
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231
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232 A callback that gets any typed keys while a popup is displayed. It can return
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233 TRUE to indicate the key has been handled and is to be discarded, or FALSE to
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234 let Vim handle the key as usual in the current state.
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235
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236 The filter function is called with two arguments: the ID of the popup and the
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237 key.
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238
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239 Some common key actions:
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240 Esc close the popup
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241 cursor keys select another entry
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242 Tab accept current suggestion
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243
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244 Vim provides standard filters |popup_filter_menu()| and
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245 |popup_filter_yesno()|.
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246
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247
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248 POPUP CALLBACK *popup-callback*
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249
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250 A callback that is invoked when the popup closes. Used by
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251 |popup_filter_menu()|. Invoked with two arguments: the ID of the popup and
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252 the result, which would usually be an index in the popup lines, or whatever
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253 the filter wants to pass.
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254
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255 ==============================================================================
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256 3. Examples *popup-examples*
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257
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258 TODO
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259
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260 Prompt the user to press y/Y or n/N: >
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261
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262 func MyDialogHandler(id, result)
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263 if a:result
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264 " ... 'y' or 'Y' was pressed
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265 endif
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266 endfunc
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267
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268 call popup_show([{'text': 'Continue? y/n'}], {
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269 \ 'filter': 'popup_filter_yesno',
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270 \ 'callback': 'MyDialogHandler',
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271 \ })
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272 <
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273
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274 vim:tw=78:ts=8:noet:ft=help:norl: