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1 *if_mzsch.txt* For Vim version 7.2a. Last change: 2007 May 03
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4 VIM REFERENCE MANUAL by Sergey Khorev
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6
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7 The MzScheme Interface to Vim *mzscheme* *MzScheme*
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8
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9 1. Commands |mzscheme-commands|
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10 2. Examples |mzscheme-examples|
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11 3. Threads |mzscheme-threads|
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12 4. The Vim access procedures |mzscheme-vim|
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13 5. Dynamic loading |mzscheme-dynamic|
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15 {Vi does not have any of these commands}
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16
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17 The MzScheme interface is available only if Vim was compiled with the
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18 |+mzscheme| feature.
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19
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20 Based on the work of Brent Fulgham.
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21 Dynamic loading added by Sergey Khorev
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22
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23 For downloading MzScheme and other info:
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24 http://www.plt-scheme.org/software/mzscheme/
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25
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26 Note: On FreeBSD you should use the "drscheme" port.
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27
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28 ==============================================================================
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29 1. Commands *mzscheme-commands*
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30
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31 *:mzscheme* *:mz*
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32 :[range]mz[scheme] {stmt}
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33 Execute MzScheme statement {stmt}. {not in Vi}
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34
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35 :[range]mz[scheme] << {endmarker}
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36 {script}
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37 {endmarker}
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38 Execute inlined MzScheme script {script}.
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39 Note: This command doesn't work if the MzScheme
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40 feature wasn't compiled in. To avoid errors, see
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41 |script-here|.
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42
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43 *:mzfile* *:mzf*
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44 :[range]mzf[ile] {file} Execute the MzScheme script in {file}. {not in Vi}
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45 All statements are executed in the namespace of the
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46 buffer that was current during :mzfile start.
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47 If you want to access other namespaces, use
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48 'parameterize'.
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49
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50 All of these commands do essentially the same thing - they execute a piece of
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51 MzScheme code, with the "current range" set to the given line
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52 range.
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53
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54 In the case of :mzscheme, the code to execute is in the command-line.
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55 In the case of :mzfile, the code to execute is the contents of the given file.
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56
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57 Each buffer has its own MzScheme namespace. Global namespace is bound to
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58 the `global-namespace' value from the 'vimext' module.
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59 MzScheme interface defines exception exn:vim, derived from exn.
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60 It is raised for various Vim errors.
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61
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62 During compilation, the MzScheme interface will remember the current MzScheme
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63 collection path. If you want to specify additional paths use the
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64 'current-library-collection-paths' parameter. E.g., to cons the user-local
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65 MzScheme collection path: >
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66 :mz << EOF
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67 (current-library-collection-paths
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68 (cons
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69 (build-path (find-system-path 'addon-dir) (version) "collects")
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70 (current-library-collection-paths)))
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71 EOF
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72 <
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73
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74 All functionality is provided through module vimext.
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75
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76 The exn:vim is available without explicit import.
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77
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78 To avoid clashes with MzScheme, consider using prefix when requiring module,
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79 e.g.: >
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80 :mzscheme (require (prefix vim- vimext))
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81 <
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82 All the examples below assume this naming scheme. Note that you need to do
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83 this again for every buffer.
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84
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85 The auto-instantiation can be achieved with autocommands, e.g. you can put
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86 something like this in your .vimrc (EOFs should not have indentation): >
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87 function s:MzRequire()
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88 if has("mzscheme")
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89 :mz << EOF
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90 (require (prefix vim- vimext))
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91 (let ((buf (vim-get-buff-by-name (vim-eval "expand(\"<afile>\")"))))
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92 (when (and buf (not (eq? buf (vim-curr-buff))))
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93 (parameterize ((current-namespace (vim-get-buff-namespace buf)))
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94 (namespace-attach-module vim-global-namespace 'vimext)
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95 (namespace-require '(prefix vim vimext)))))
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96 EOF
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97 endif
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98 endfunction
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99
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100 function s:MzStartup()
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101 if has("mzscheme")
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102 au BufNew,BufNewFile,BufAdd,BufReadPre * :call s:MzRequire()
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103 :mz << EOF
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104 (current-library-collection-paths
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105 (cons
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106 (build-path (find-system-path 'addon-dir) (version) "collects")
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107 (current-library-collection-paths)))
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108 EOF
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109 endif
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110 endfunction
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111
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112 call s:MzStartup()
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113 <
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114
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115 The global namespace just instantiated this module with the prefix "vimext:".
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116 *mzscheme-sandbox*
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117 When executed in the |sandbox|, access to some filesystem and Vim interface
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118 procedures is restricted.
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119
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120 ==============================================================================
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121 2. Examples *mzscheme-examples*
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122 >
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123 :mzscheme (display "Hello")
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124 :mzscheme (vim-set-buff-line 10 "This is line #10")
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125 <
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126 Inline script usage: >
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127 function! <SID>SetFirstLine()
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128 :mz << EOF
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129 (display "!!!")
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130 (vim-set-buff-line 1 "This is line #1")
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131 (vim-beep)
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132 EOF
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133 endfunction
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134
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135 nmap <F9> :call <SID>SetFirstLine() <CR>
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136 <
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137 File execution: >
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138 :mzfile supascript.scm
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139 <
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140 Accessing the current buffer namespace from an MzScheme program running in
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141 another buffer within |:mzfile|-executed script : >
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142 ; Move to the window below
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143 (vim-command "wincmd j")
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144 ; execute in the context of buffer, to which window belongs
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145 ; assume that buffer has 'textstring' defined
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146 (parameterize ((current-namespace
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147 (vim-get-buff-namespace (vim-curr-buff))))
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148 (eval '(vim-set-buff-line 1 textstring)))
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149 <
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150
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151 ==============================================================================
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152 3. Threads *mzscheme-threads*
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153
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154 The MzScheme interface supports threads. They are independent from OS threads,
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155 thus scheduling is required. The option 'mzquantum' determines how often
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156 Vim should poll for available MzScheme threads.
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157 NOTE
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158 Thread scheduling in the console version of Vim is less reliable than in the
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159 GUI version.
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160
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161 ==============================================================================
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162 5. VIM Functions *mzscheme-vim*
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163
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164 *mzscheme-vimext*
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165 The 'vimext' module provides access to procedures defined in the MzScheme
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166 interface.
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167
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168 Common
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169 ------
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170 (command {command-string}) Perform the vim ":Ex" style command.
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171 (eval {expr-string}) Evaluate the vim expression to a string.
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172 A |List| is turned into a string by
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173 joining the items and inserting line
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174 breaks.
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175 NOTE clashes with MzScheme eval
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176 (range-start) Start/End of the range passed with
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177 (range-end) the Scheme command.
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178 (beep) beep
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179 (get-option {option-name} [buffer-or-window]) Get Vim option value (either
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180 local or global, see set-option).
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181 (set-option {string} [buffer-or-window])
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182 Set a Vim option. String must have option
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183 setting form (like optname=optval, or
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184 optname+=optval, etc.) When called with
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185 {buffer} or {window} the local option will
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186 be set. The symbol 'global can be passed
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187 as {buffer-or-window}. Then |:setglobal|
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188 will be used.
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189 global-namespace The MzScheme main namespace.
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190
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191 Buffers *mzscheme-buffer*
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192 -------
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193 (buff? {object}) Is object a buffer?
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194 (buff-valid? {object}) Is object a valid buffer? (i.e.
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195 corresponds to the real Vim buffer)
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196 (get-buff-line {linenr} [buffer])
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197 Get line from a buffer.
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198 (set-buff-line {linenr} {string} [buffer])
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199 Set a line in a buffer. If {string} is #f,
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200 the line gets deleted. The [buffer]
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201 argument is optional. If omitted, the
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202 current buffer will be used.
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203 (get-buff-line-list {start} {end} [buffer])
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204 Get a list of lines in a buffer. {Start}
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205 and {end} are 1-based. {Start} is
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206 inclusive, {end} - exclusive.
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207 (set-buff-line-list {start} {end} {string-list} [buffer])
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208 Set a list of lines in a buffer. If
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209 string-list is #f or null, the lines get
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210 deleted. If a list is shorter than
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211 {end}-{start} the remaining lines will
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212 be deleted.
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213 (get-buff-name [buffer]) Get a buffer's text name.
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214 (get-buff-num [buffer]) Get a buffer's number.
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215 (get-buff-size [buffer]) Get buffer line count.
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216 (insert-buff-line-list {linenr} {string/string-list} [buffer])
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217 Insert a list of lines into a buffer after
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218 {linenr}. If {linenr} is 0, lines will be
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219 inserted at start.
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220 (curr-buff) Get the current buffer. Use procedures
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221 from `vimcmd' module to change it.
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222 (buff-count) Get count of total buffers in the editor.
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223 (get-next-buff [buffer]) Get next buffer.
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224 (get-prev-buff [buffer]) Get previous buffer. Return #f when there
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225 are no more buffers.
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226 (open-buff {filename}) Open a new buffer (for file "name")
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227 (get-buff-by-name {buffername}) Get a buffer by its filename or #f
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228 if there is no such buffer.
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229 (get-buff-by-num {buffernum}) Get a buffer by its number (return #f if
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230 there is no buffer with this number).
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231 (get-buff-namespace [buffer]) Get buffer namespace.
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232
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233 Windows *mzscheme-window*
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234 ------
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235 (win? {object}) Is object a window?
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236 (win-valid? {object}) Is object a valid window (i.e. corresponds
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237 to the real Vim window)?
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238 (curr-win) Get the current window.
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239 (win-count) Get count of windows.
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240 (get-win-num [window]) Get window number.
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241 (get-win-by-num {windownum}) Get window by its number.
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242 (get-win-buffer [window]) Get the buffer for a given window.
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243 (get-win-height [window])
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244 (set-win-height {height} [window]) Get/Set height of window.
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245 (get-win-width [window])
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246 (set-win-width {width} [window])Get/Set width of window.
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247 (get-win-list [buffer]) Get list of windows for a buffer.
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248 (get-cursor [window]) Get cursor position in a window as
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249 a pair (linenr . column).
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250 (set-cursor (line . col) [window]) Set cursor position.
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251
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252 ==============================================================================
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253 5. Dynamic loading *mzscheme-dynamic*
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254
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255 On MS-Windows the MzScheme libraries can be loaded dynamically. The |:version|
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256 output then includes |+mzscheme/dyn|.
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257
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258 This means that Vim will search for the MzScheme DLL files only when needed.
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259 When you don't use the MzScheme interface you don't need them, thus you can
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260 use Vim without these DLL files.
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261
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262 To use the MzScheme interface the MzScheme DLLs must be in your search path.
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263 In a console window type "path" to see what directories are used.
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264
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265 The names of the DLLs must match the MzScheme version Vim was compiled with.
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266 For MzScheme version 209 they will be "libmzsch209_000.dll" and
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267 "libmzgc209_000.dll". To know for sure look at the output of the ":version"
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268 command, look for -DDYNAMIC_MZSCH_DLL="something" and
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269 -DDYNAMIC_MZGC_DLL="something" in the "Compilation" info.
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270
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271 ======================================================================
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272 vim:tw=78:ts=8:sts=4:ft=help:norl:
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