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annotate runtime/pack/dist/opt/editexisting/plugin/editexisting.vim @ 33090:461541d860ac v9.0.1830

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patch 9.0.1830: Vim9: crash when accessing a null object Commit: https://github.com/vim/vim/commit/d7085a06358c22250a27186bb7d52112ed4addd1 Author: Gianmaria Bajo <mg1979.git@gmail.com> Date: Thu Aug 31 18:15:26 2023 +0200 patch 9.0.1830: Vim9: crash when accessing a null object Problem: Vim9: crash when accessing a null object Solution: Check accessing a NULL object in def function An object is NULL when the variable is declared, but the constructor isn't called. Accessing/setting a member on the object crashed Vim. Note: this happens inside def functions, at script level things work differently. Accessing a NULL object member results in E1360 (correctly), while setting a value on it results in E1012 (type mismatch) so there's still something to fix. closes: #12973 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Gianmaria Bajo <mg1979.git@gmail.com>
author Christian Brabandt <cb@256bit.org>
date Thu, 31 Aug 2023 18:30:03 +0200
parents 75c283beb74f
children
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1 " Vim Plugin: Edit the file with an existing Vim if possible
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2 " Maintainer: The Vim Project <https://github.com/vim/vim>
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3 " Last Change: 2023 Aug 13
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5 " To use add ":packadd! editexisting" in your vimrc file.
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7 " This plugin serves two purposes:
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8 " 1. On startup, if we were invoked with one file name argument and the file
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9 " is not modified then try to find another Vim instance that is editing
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10 " this file. If there is one then bring it to the foreground and exit.
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11 " 2. When a file is edited and a swap file exists for it, try finding that
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12 " other Vim and bring it to the foreground. Requires Vim 7, because it
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13 " uses the SwapExists autocommand event.
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14
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15 " Function that finds the Vim instance that is editing "filename" and brings
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16 " it to the foreground.
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17 func s:EditElsewhere(filename)
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18 let fname_esc = substitute(a:filename, "'", "''", "g")
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19
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20 let servers = serverlist()
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21 while servers != ''
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22 " Get next server name in "servername"; remove it from "servers".
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23 let i = match(servers, "\n")
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24 if i == -1
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25 let servername = servers
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26 let servers = ''
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27 else
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28 let servername = strpart(servers, 0, i)
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29 let servers = strpart(servers, i + 1)
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30 endif
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32 " Skip ourselves.
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33 if servername ==? v:servername
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34 continue
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35 endif
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37 " Check if this server is editing our file.
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38 try
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39 if remote_expr(servername, "bufloaded('" . fname_esc . "')")
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40 " Yes, bring it to the foreground.
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41 if has("win32")
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42 call remote_foreground(servername)
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43 endif
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44 call remote_expr(servername, "foreground()")
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45
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46 if remote_expr(servername, "exists('*EditExisting')")
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47 " Make sure the file is visible in a window (not hidden).
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48 " If v:swapcommand exists and is set, send it to the server.
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49 if exists("v:swapcommand")
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50 let c = substitute(v:swapcommand, "'", "''", "g")
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51 call remote_expr(servername, "EditExisting('" . fname_esc . "', '" . c . "')")
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52 else
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53 call remote_expr(servername, "EditExisting('" . fname_esc . "', '')")
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54 endif
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55 endif
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56
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57 if !(has('vim_starting') && has('gui_running') && has('gui_win32'))
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58 " Tell the user what is happening. Not when the GUI is starting
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59 " though, it would result in a message box.
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60 echomsg "File is being edited by " . servername
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61 sleep 2
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62 endif
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63 return 'q'
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64 endif
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65 catch /^Vim\%((\a\+)\)\=:E241:/
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66 " Unable to send to this server, ignore it.
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67 endtry
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68 endwhile
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69 return ''
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70 endfunc
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71
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72 " When the plugin is loaded and there is one file name argument: Find another
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73 " Vim server that is editing this file right now.
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74 if argc() == 1 && !&modified
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75 if s:EditElsewhere(expand("%:p")) == 'q'
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76 quit
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77 endif
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78 endif
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79
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80 " Setup for handling the situation that an existing swap file is found.
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81 try
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82 au! SwapExists * let v:swapchoice = s:EditElsewhere(expand("<afile>:p"))
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83 catch
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84 " Without SwapExists we don't do anything for ":edit" commands
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85 endtry
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86
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87 " Function used on the server to make the file visible and possibly execute a
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88 " command.
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89 func! EditExisting(fname, command)
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90 " Get the window number of the file in the current tab page.
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91 let winnr = bufwinnr(a:fname)
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92 if winnr <= 0
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93 " Not found, look in other tab pages.
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94 let bufnr = bufnr(a:fname)
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95 for i in range(tabpagenr('$'))
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96 if index(tabpagebuflist(i + 1), bufnr) >= 0
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97 " Make this tab page the current one and find the window number.
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98 exe 'tabnext ' . (i + 1)
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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99 let winnr = bufwinnr(a:fname)
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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100 break
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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101 endif
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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102 endfor
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
Christian Brabandt <cb@256bit.org>
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103 endif
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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104
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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105 if winnr > 0
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
Christian Brabandt <cb@256bit.org>
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106 exe winnr . "wincmd w"
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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107 elseif exists('*fnameescape')
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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108 exe "split " . fnameescape(a:fname)
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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109 else
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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110 exe "split " . escape(a:fname, " \t\n*?[{`$\\%#'\"|!<")
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
Christian Brabandt <cb@256bit.org>
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111 endif
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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112
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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113 if a:command != ''
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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114 exe "normal! " . a:command
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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115 endif
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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116
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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117 redraw
57cafbda13ad commit https://github.com/vim/vim/commit/cf2d8dee5117b9add3a3f5fc91b3569437e7d359
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118 endfunc