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1 #!/usr/bin/env zsh
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2 ##############################################################################
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3 #
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4 # Copyright (c) 2009 Peter Stephenson
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5 # Copyright (c) 2011 Guido van Steen
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6 # Copyright (c) 2011 Suraj N. Kurapati
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7 # Copyright (c) 2011 Sorin Ionescu
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8 # Copyright (c) 2011 Vincent Guerci
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9 # All rights reserved.
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10 #
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11 # Redistribution and use in source and binary forms, with or without
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12 # modification, are permitted provided that the following conditions are met:
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13 #
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14 # * Redistributions of source code must retain the above copyright
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15 # notice, this list of conditions and the following disclaimer.
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16 #
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17 # * Redistributions in binary form must reproduce the above
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18 # copyright notice, this list of conditions and the following
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19 # disclaimer in the documentation and/or other materials provided
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20 # with the distribution.
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21 #
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22 # * Neither the name of the FIZSH nor the names of its contributors
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23 # may be used to endorse or promote products derived from this
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24 # software without specific prior written permission.
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25 #
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26 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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27 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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28 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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29 # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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30 # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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31 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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32 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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33 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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34 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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35 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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36 # POSSIBILITY OF SUCH DAMAGE.
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37 #
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38 ##############################################################################
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39
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40 #-----------------------------------------------------------------------------
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41 # configuration variables
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42 #-----------------------------------------------------------------------------
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43
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44 HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND='bg=magenta,fg=white,bold'
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45 HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_NOT_FOUND='bg=red,fg=white,bold'
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46 HISTORY_SUBSTRING_SEARCH_GLOBBING_FLAGS='i'
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47
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48 #-----------------------------------------------------------------------------
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49 # the main ZLE widgets
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50 #-----------------------------------------------------------------------------
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51
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52 function history-substring-search-up() {
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53 _history-substring-search-begin
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54
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55 _history-substring-search-up-history ||
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56 _history-substring-search-up-buffer ||
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57 _history-substring-search-up-search
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58
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59 _history-substring-search-end
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60 }
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61
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62 function history-substring-search-down() {
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63 _history-substring-search-begin
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64
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65 _history-substring-search-down-history ||
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66 _history-substring-search-down-buffer ||
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67 _history-substring-search-down-search
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68
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69 _history-substring-search-end
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70 }
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71
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72 zle -N history-substring-search-up
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73 zle -N history-substring-search-down
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74
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75 #-----------------------------------------------------------------------------
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76 # implementation details
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77 #-----------------------------------------------------------------------------
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78
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79 zmodload -F zsh/parameter
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80
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81 #
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82 # We have to "override" some keys and widgets if the
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83 # zsh-syntax-highlighting plugin has not been loaded:
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84 #
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85 # https://github.com/nicoulaj/zsh-syntax-highlighting
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86 #
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87 if [[ $+functions[_zsh_highlight] -eq 0 ]]; then
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88 #
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89 # Dummy implementation of _zsh_highlight() that
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90 # simply removes any existing highlights when the
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91 # user inserts printable characters into $BUFFER.
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92 #
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93 function _zsh_highlight() {
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94 if [[ $KEYS == [[:print:]] ]]; then
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95 region_highlight=()
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96 fi
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97 }
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98
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99 #
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100 # The following snippet was taken from the zsh-syntax-highlighting project:
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101 #
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102 # https://github.com/zsh-users/zsh-syntax-highlighting/blob/56b134f5d62ae3d4e66c7f52bd0cc2595f9b305b/zsh-syntax-highlighting.zsh#L126-161
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103 #
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104 # Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
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105 # All rights reserved.
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106 #
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107 # Redistribution and use in source and binary forms, with or without
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108 # modification, are permitted provided that the following conditions are
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109 # met:
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110 #
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111 # * Redistributions of source code must retain the above copyright
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112 # notice, this list of conditions and the following disclaimer.
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113 #
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114 # * Redistributions in binary form must reproduce the above copyright
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115 # notice, this list of conditions and the following disclaimer in the
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116 # documentation and/or other materials provided with the distribution.
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117 #
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118 # * Neither the name of the zsh-syntax-highlighting contributors nor the
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119 # names of its contributors may be used to endorse or promote products
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120 # derived from this software without specific prior written permission.
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121 #
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122 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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123 # IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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124 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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125 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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126 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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127 # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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128 # PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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129 # PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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130 # LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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131 # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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132 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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133 #
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134 #--------------8<-------------------8<-------------------8<-----------------
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135 # Rebind all ZLE widgets to make them invoke _zsh_highlights.
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136 _zsh_highlight_bind_widgets()
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137 {
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138 # Load ZSH module zsh/zleparameter, needed to override user defined widgets.
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139 zmodload zsh/zleparameter 2>/dev/null || {
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140 echo 'zsh-syntax-highlighting: failed loading zsh/zleparameter.' >&2
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141 return 1
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142 }
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143
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144 # Override ZLE widgets to make them invoke _zsh_highlight.
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145 local cur_widget
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146 for cur_widget in ${${(f)"$(builtin zle -la)"}:#(.*|_*|orig-*|run-help|which-command|beep)}; do
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147 case $widgets[$cur_widget] in
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148
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149 # Already rebound event: do nothing.
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150 user:$cur_widget|user:_zsh_highlight_widget_*);;
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151
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152 # User defined widget: override and rebind old one with prefix "orig-".
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153 user:*) eval "zle -N orig-$cur_widget ${widgets[$cur_widget]#*:}; \
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154 _zsh_highlight_widget_$cur_widget() { builtin zle orig-$cur_widget -- \"\$@\" && _zsh_highlight }; \
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155 zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
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156
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157 # Completion widget: override and rebind old one with prefix "orig-".
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158 completion:*) eval "zle -C orig-$cur_widget ${${widgets[$cur_widget]#*:}/:/ }; \
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159 _zsh_highlight_widget_$cur_widget() { builtin zle orig-$cur_widget -- \"\$@\" && _zsh_highlight }; \
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160 zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
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161
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162 # Builtin widget: override and make it call the builtin ".widget".
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163 builtin) eval "_zsh_highlight_widget_$cur_widget() { builtin zle .$cur_widget -- \"\$@\" && _zsh_highlight }; \
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164 zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
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165
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166 # Default: unhandled case.
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167 *) echo "zsh-syntax-highlighting: unhandled ZLE widget '$cur_widget'" >&2 ;;
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168 esac
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169 done
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170 }
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171 #-------------->8------------------->8------------------->8-----------------
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172
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173 _zsh_highlight_bind_widgets
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174 fi
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175
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176 function _history-substring-search-begin() {
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177 setopt localoptions extendedglob
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178
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179 _history_substring_search_refresh_display=
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180 _history_substring_search_query_highlight=
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181
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182 #
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183 # Continue using the previous $_history_substring_search_result by default,
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184 # unless the current query was cleared or a new/different query was entered.
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185 #
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186 if [[ -z $BUFFER || $BUFFER != $_history_substring_search_result ]]; then
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187 #
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188 # For the purpose of highlighting we will also keep
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189 # a version without doubly-escaped meta characters.
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190 #
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191 _history_substring_search_query=$BUFFER
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192
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193 #
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194 # $BUFFER contains the text that is in the command-line currently.
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195 # we put an extra "\\" before meta characters such as "\(" and "\)",
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196 # so that they become "\\\(" and "\\\)".
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197 #
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198 _history_substring_search_query_escaped=${BUFFER//(#m)[\][()|\\*?#<>~^]/\\$MATCH}
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199
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200 #
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201 # Find all occurrences of the search query in the history file.
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202 #
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203 # (k) turns it an array of line numbers.
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204 #
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205 # (on) seems to remove duplicates, which are default
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206 # options. They can be turned off by (ON).
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207 #
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208 _history_substring_search_matches=(${(kon)history[(R)(#$HISTORY_SUBSTRING_SEARCH_GLOBBING_FLAGS)*${_history_substring_search_query_escaped}*]})
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209
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210 #
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211 # Define the range of values that $_history_substring_search_match_index
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212 # can take: [0, $_history_substring_search_matches_count_plus].
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213 #
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214 _history_substring_search_matches_count=$#_history_substring_search_matches
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215 _history_substring_search_matches_count_plus=$(( _history_substring_search_matches_count + 1 ))
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216 _history_substring_search_matches_count_sans=$(( _history_substring_search_matches_count - 1 ))
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217
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218 #
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219 # If $_history_substring_search_match_index is equal to
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220 # $_history_substring_search_matches_count_plus, this indicates that we
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221 # are beyond the beginning of $_history_substring_search_matches.
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222 #
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223 # If $_history_substring_search_match_index is equal to 0, this indicates
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224 # that we are beyond the end of $_history_substring_search_matches.
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225 #
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226 # If we have initially pressed "up" we have to initialize
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227 # $_history_substring_search_match_index to
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228 # $_history_substring_search_matches_count_plus so that it will be
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229 # decreased to $_history_substring_search_matches_count.
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230 #
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231 # If we have initially pressed "down" we have to initialize
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232 # $_history_substring_search_match_index to
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233 # $_history_substring_search_matches_count so that it will be increased to
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234 # $_history_substring_search_matches_count_plus.
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235 #
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236 if [[ $WIDGET == history-substring-search-down ]]; then
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237 _history_substring_search_match_index=$_history_substring_search_matches_count
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238 else
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239 _history_substring_search_match_index=$_history_substring_search_matches_count_plus
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240 fi
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241 fi
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242 }
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243
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244 function _history-substring-search-end() {
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245 setopt localoptions extendedglob
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246
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247 _history_substring_search_result=$BUFFER
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248
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249 # the search was succesful so display the result properly by clearing away
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250 # existing highlights and moving the cursor to the end of the result buffer
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251 if [[ $_history_substring_search_refresh_display -eq 1 ]]; then
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252 region_highlight=()
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253 CURSOR=${#BUFFER}
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254 fi
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255
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256 # highlight command line using zsh-syntax-highlighting
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257 _zsh_highlight
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258
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259 # highlight the search query inside the command line
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260 if [[ -n $_history_substring_search_query_highlight && -n $_history_substring_search_query ]]; then
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261 #
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262 # The following expression yields a variable $MBEGIN, which
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263 # indicates the begin position + 1 of the first occurrence
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264 # of _history_substring_search_query_escaped in $BUFFER.
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265 #
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266 : ${(S)BUFFER##(#m$HISTORY_SUBSTRING_SEARCH_GLOBBING_FLAGS)($_history_substring_search_query##)}
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267 local begin=$(( MBEGIN - 1 ))
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268 local end=$(( begin + $#_history_substring_search_query ))
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269 region_highlight+=("$begin $end $_history_substring_search_query_highlight")
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270 fi
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271
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272 # For debugging purposes:
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273 # zle -R "mn: "$_history_substring_search_match_index" m#: "${#_history_substring_search_matches}
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274 # read -k -t 200 && zle -U $REPLY
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275
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276 # Exit successfully from the history-substring-search-* widgets.
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277 return 0
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278 }
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279
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280 function _history-substring-search-up-buffer() {
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281 #
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282 # Check if the UP arrow was pressed to move the cursor within a multi-line
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283 # buffer. This amounts to three tests:
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284 #
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285 # 1. $#buflines -gt 1.
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286 #
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287 # 2. $CURSOR -ne $#BUFFER.
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288 #
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289 # 3. Check if we are on the first line of the current multi-line buffer.
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290 # If so, pressing UP would amount to leaving the multi-line buffer.
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291 #
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292 # We check this by adding an extra "x" to $LBUFFER, which makes
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293 # sure that xlbuflines is always equal to the number of lines
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294 # until $CURSOR (including the line with the cursor on it).
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295 #
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296 local buflines XLBUFFER xlbuflines
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297 buflines=(${(f)BUFFER})
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298 XLBUFFER=$LBUFFER"x"
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299 xlbuflines=(${(f)XLBUFFER})
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300
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301 if [[ $#buflines -gt 1 && $CURSOR -ne $#BUFFER && $#xlbuflines -ne 1 ]]; then
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302 zle up-line-or-history
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303 return 0
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304 fi
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305
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306 return 1
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307 }
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308
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309 function _history-substring-search-down-buffer() {
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310 #
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311 # Check if the DOWN arrow was pressed to move the cursor within a multi-line
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312 # buffer. This amounts to three tests:
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313 #
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314 # 1. $#buflines -gt 1.
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315 #
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316 # 2. $CURSOR -ne $#BUFFER.
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317 #
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318 # 3. Check if we are on the last line of the current multi-line buffer.
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319 # If so, pressing DOWN would amount to leaving the multi-line buffer.
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320 #
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321 # We check this by adding an extra "x" to $RBUFFER, which makes
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322 # sure that xrbuflines is always equal to the number of lines
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323 # from $CURSOR (including the line with the cursor on it).
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324 #
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325 local buflines XRBUFFER xrbuflines
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326 buflines=(${(f)BUFFER})
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327 XRBUFFER="x"$RBUFFER
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328 xrbuflines=(${(f)XRBUFFER})
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329
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330 if [[ $#buflines -gt 1 && $CURSOR -ne $#BUFFER && $#xrbuflines -ne 1 ]]; then
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331 zle down-line-or-history
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332 return 0
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333 fi
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334
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335 return 1
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336 }
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337
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338 function _history-substring-search-up-history() {
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339 #
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340 # Behave like up in ZSH, except clear the $BUFFER
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341 # when beginning of history is reached like in Fish.
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342 #
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343 if [[ -z $_history_substring_search_query ]]; then
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344
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345 # we have reached the absolute top of history
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346 if [[ $HISTNO -eq 1 ]]; then
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347 BUFFER=
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348
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349 # going up from somewhere below the top of history
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350 else
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351 zle up-line-or-history
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352 fi
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353
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354 return 0
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355 fi
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356
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357 return 1
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358 }
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359
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360 function _history-substring-search-down-history() {
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361 #
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362 # Behave like down-history in ZSH, except clear the
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363 # $BUFFER when end of history is reached like in Fish.
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364 #
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365 if [[ -z $_history_substring_search_query ]]; then
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366
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367 # going down from the absolute top of history
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368 if [[ $HISTNO -eq 1 && -z $BUFFER ]]; then
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369 BUFFER=${history[1]}
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370 _history_substring_search_refresh_display=1
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371
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372 # going down from somewhere above the bottom of history
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373 else
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374 zle down-line-or-history
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375 fi
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376
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377 return 0
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378 fi
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379
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380 return 1
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381 }
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382
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383 function _history-substring-search-not-found() {
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384 #
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385 # Nothing matched the search query, so put it back into the $BUFFER while
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386 # highlighting it accordingly so the user can revise it and search again.
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387 #
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388 _history_substring_search_old_buffer=$BUFFER
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389 BUFFER=$_history_substring_search_query
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390 _history_substring_search_query_highlight=$HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_NOT_FOUND
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391 }
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392
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393 function _history-substring-search-up-search() {
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394 _history_substring_search_refresh_display=1
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395
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396 #
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397 # Highlight matches during history-substring-up-search:
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398 #
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399 # The following constants have been initialized in
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400 # _history-substring-search-up/down-search():
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401 #
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402 # $_history_substring_search_matches is the current list of matches
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403 # $_history_substring_search_matches_count is the current number of matches
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404 # $_history_substring_search_matches_count_plus is the current number of matches + 1
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405 # $_history_substring_search_matches_count_sans is the current number of matches - 1
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406 # $_history_substring_search_match_index is the index of the current match
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407 #
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408 # The range of values that $_history_substring_search_match_index can take
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409 # is: [0, $_history_substring_search_matches_count_plus]. A value of 0
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410 # indicates that we are beyond the end of
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411 # $_history_substring_search_matches. A value of
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412 # $_history_substring_search_matches_count_plus indicates that we are beyond
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413 # the beginning of $_history_substring_search_matches.
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414 #
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415 # In _history-substring-search-up-search() the initial value of
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416 # $_history_substring_search_match_index is
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417 # $_history_substring_search_matches_count_plus. This value is set in
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418 # _history-substring-search-begin(). _history-substring-search-up-search()
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419 # will initially decrease it to $_history_substring_search_matches_count.
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420 #
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421 if [[ $_history_substring_search_match_index -ge 2 ]]; then
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422 #
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423 # Highlight the next match:
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424 #
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425 # 1. Decrease the value of $_history_substring_search_match_index.
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426 #
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427 # 2. Use $HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
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428 # to highlight the current buffer.
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429 #
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430 (( _history_substring_search_match_index-- ))
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431 BUFFER=$history[$_history_substring_search_matches[$_history_substring_search_match_index]]
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432 _history_substring_search_query_highlight=$HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
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433
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434 elif [[ $_history_substring_search_match_index -eq 1 ]]; then
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435 #
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436 # We will move beyond the end of $_history_substring_search_matches:
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437 #
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438 # 1. Decrease the value of $_history_substring_search_match_index.
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439 #
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440 # 2. Save the current buffer in $_history_substring_search_old_buffer,
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441 # so that it can be retrieved by
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442 # _history-substring-search-down-search() later.
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443 #
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444 # 3. Make $BUFFER equal to $_history_substring_search_query.
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445 #
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446 # 4. Use $HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_NOT_FOUND
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447 # to highlight the current buffer.
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448 #
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449 (( _history_substring_search_match_index-- ))
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450 _history-substring-search-not-found
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451
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452 elif [[ $_history_substring_search_match_index -eq $_history_substring_search_matches_count_plus ]]; then
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453 #
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454 # We were beyond the beginning of $_history_substring_search_matches but
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455 # UP makes us move back to $_history_substring_search_matches:
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456 #
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457 # 1. Decrease the value of $_history_substring_search_match_index.
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458 #
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459 # 2. Restore $BUFFER from $_history_substring_search_old_buffer.
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460 #
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461 # 3. Use $HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
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462 # to highlight the current buffer.
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463 #
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464 (( _history_substring_search_match_index-- ))
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465 BUFFER=$_history_substring_search_old_buffer
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466 _history_substring_search_query_highlight=$HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
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467
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468 else
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469 #
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470 # We are at the beginning of history and there are no further matches.
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471 #
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472 _history-substring-search-not-found
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473 fi
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474 }
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475
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476 function _history-substring-search-down-search() {
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477 _history_substring_search_refresh_display=1
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478
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479 #
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480 # Highlight matches during history-substring-up-search:
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481 #
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482 # The following constants have been initialized in
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483 # _history-substring-search-up/down-search():
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484 #
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485 # $_history_substring_search_matches is the current list of matches
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486 # $_history_substring_search_matches_count is the current number of matches
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487 # $_history_substring_search_matches_count_plus is the current number of matches + 1
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488 # $_history_substring_search_matches_count_sans is the current number of matches - 1
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489 # $_history_substring_search_match_index is the index of the current match
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490 #
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491 # The range of values that $_history_substring_search_match_index can take
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492 # is: [0, $_history_substring_search_matches_count_plus]. A value of 0
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493 # indicates that we are beyond the end of
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494 # $_history_substring_search_matches. A value of
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495 # $_history_substring_search_matches_count_plus indicates that we are beyond
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496 # the beginning of $_history_substring_search_matches.
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497 #
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498 # In _history-substring-search-down-search() the initial value of
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499 # $_history_substring_search_match_index is
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500 # $_history_substring_search_matches_count. This value is set in
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501 # _history-substring-search-begin().
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502 # _history-substring-search-down-search() will initially increase it to
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503 # $_history_substring_search_matches_count_plus.
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504 #
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505 if [[ $_history_substring_search_match_index -le $_history_substring_search_matches_count_sans ]]; then
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506 #
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507 # Highlight the next match:
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508 #
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509 # 1. Increase $_history_substring_search_match_index by 1.
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510 #
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511 # 2. Use $HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
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512 # to highlight the current buffer.
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513 #
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514 (( _history_substring_search_match_index++ ))
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515 BUFFER=$history[$_history_substring_search_matches[$_history_substring_search_match_index]]
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516 _history_substring_search_query_highlight=$HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
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517
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518 elif [[ $_history_substring_search_match_index -eq $_history_substring_search_matches_count ]]; then
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519 #
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520 # We will move beyond the beginning of $_history_substring_search_matches:
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521 #
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522 # 1. Increase $_history_substring_search_match_index by 1.
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523 #
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524 # 2. Save the current buffer in $_history_substring_search_old_buffer, so
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525 # that it can be retrieved by _history-substring-search-up-search()
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526 # later.
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527 #
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528 # 3. Make $BUFFER equal to $_history_substring_search_query.
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529 #
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530 # 4. Use $HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_NOT_FOUND
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531 # to highlight the current buffer.
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532 #
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533 (( _history_substring_search_match_index++ ))
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534 _history-substring-search-not-found
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535
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536 elif [[ $_history_substring_search_match_index -eq 0 ]]; then
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537 #
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538 # We were beyond the end of $_history_substring_search_matches but DOWN
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539 # makes us move back to the $_history_substring_search_matches:
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540 #
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541 # 1. Increase $_history_substring_search_match_index by 1.
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542 #
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543 # 2. Restore $BUFFER from $_history_substring_search_old_buffer.
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544 #
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545 # 3. Use $HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
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546 # to highlight the current buffer.
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547 #
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548 (( _history_substring_search_match_index++ ))
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549 BUFFER=$_history_substring_search_old_buffer
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550 _history_substring_search_query_highlight=$HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
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551
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552 else
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553 #
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554 # We are at the end of history and there are no further matches.
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555 #
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556 _history-substring-search-not-found
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557 fi
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558 }
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559
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560 # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
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561 # vim: ft=zsh sw=2 ts=2 et
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