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846 lines
29 KiB
Bash
846 lines
29 KiB
Bash
#!/usr/bin/env zsh
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##############################################################################
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#
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# Copyright (c) 2009 Peter Stephenson
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# Copyright (c) 2011 Guido van Steen
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# Copyright (c) 2011 Suraj N. Kurapati
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# Copyright (c) 2011 Sorin Ionescu
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# Copyright (c) 2011 Vincent Guerci
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# Copyright (c) 2016 Geza Lore
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# Copyright (c) 2017 Bengt Brodersen
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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#
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# * Neither the name of the FIZSH nor the names of its contributors
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# may be used to endorse or promote products derived from this
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# software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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##############################################################################
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#-----------------------------------------------------------------------------
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# declare global configuration variables
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#-----------------------------------------------------------------------------
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: ${HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND='bg=magenta,fg=white,bold'}
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: ${HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_NOT_FOUND='bg=red,fg=white,bold'}
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: ${HISTORY_SUBSTRING_SEARCH_GLOBBING_FLAGS='i'}
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: ${HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE=''}
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: ${HISTORY_SUBSTRING_SEARCH_FUZZY=''}
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: ${HISTORY_SUBSTRING_SEARCH_PREFIXED=''}
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#-----------------------------------------------------------------------------
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# declare internal global variables
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#-----------------------------------------------------------------------------
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typeset -g BUFFER MATCH MBEGIN MEND CURSOR
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typeset -g _history_substring_search_refresh_display
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typeset -g _history_substring_search_query_highlight
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typeset -g _history_substring_search_result
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typeset -g _history_substring_search_query
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typeset -g -a _history_substring_search_query_parts
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typeset -g -a _history_substring_search_raw_matches
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typeset -g -i _history_substring_search_raw_match_index
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typeset -g -a _history_substring_search_matches
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typeset -g -i _history_substring_search_match_index
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typeset -g -A _history_substring_search_unique_filter
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typeset -g -i _history_substring_search_zsh_5_9
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#-----------------------------------------------------------------------------
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# the main ZLE widgets
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#-----------------------------------------------------------------------------
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history-substring-search-up() {
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_history-substring-search-begin
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_history-substring-search-up-history ||
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_history-substring-search-up-buffer ||
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_history-substring-search-up-search
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_history-substring-search-end
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}
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history-substring-search-down() {
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_history-substring-search-begin
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_history-substring-search-down-history ||
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_history-substring-search-down-buffer ||
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_history-substring-search-down-search
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_history-substring-search-end
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}
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zle -N history-substring-search-up
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zle -N history-substring-search-down
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#-----------------------------------------------------------------------------
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# implementation details
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#-----------------------------------------------------------------------------
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zmodload -F zsh/parameter
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autoload -Uz is-at-least
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if is-at-least 5.9 $ZSH_VERSION; then
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_history_substring_search_zsh_5_9=1
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fi
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#
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# We have to "override" some keys and widgets if the
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# zsh-syntax-highlighting plugin has not been loaded:
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#
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# https://github.com/nicoulaj/zsh-syntax-highlighting
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#
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if [[ $+functions[_zsh_highlight] -eq 0 ]]; then
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#
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# Dummy implementation of _zsh_highlight() that
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# simply removes any existing highlights when the
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# user inserts printable characters into $BUFFER.
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#
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_zsh_highlight() {
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if [[ $KEYS == [[:print:]] ]]; then
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region_highlight=()
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fi
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}
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#
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# Check if $1 denotes the name of a callable function, i.e. it is fully
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# defined or it is marked for autoloading and autoloading it at the first
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# call to it will succeed. In particular, if $1 has been marked for
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# autoloading but is not available in $fpath, then it will return 1 (false).
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#
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# This is based on the zsh-syntax-highlighting plugin.
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#
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_history-substring-search-function-callable() {
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if (( ${+functions[$1]} )) && ! [[ "$functions[$1]" == *"builtin autoload -X"* ]]; then
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return 0 # already fully loaded
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else
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# "$1" is either an autoload stub, or not a function at all.
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# We expect 'autoload +X' to return non-zero if it fails to fully load
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# the function.
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( autoload -U +X -- "$1" 2>/dev/null )
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return $?
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fi
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}
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#
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# The zsh-syntax-highlighting plugin uses zle-line-pre-redraw hook instead
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# of the legacy "bind all widgets" if 1) zsh has the memo= feature (added in
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# version 5.9) and 2) add-zle-hook-widget is available.
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#
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if [[ $_history_substring_search_zsh_5_9 -eq 1 ]] && _history-substring-search-function-callable add-zle-hook-widget; then
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#
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# The following code is based on the zsh-syntax-highlighting plugin.
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#
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autoload -U add-zle-hook-widget
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_history-substring-search-zle-line-finish() {
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#
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# Reset $WIDGET since the 'main' highlighter depends on it.
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#
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# Since $WIDGET is declared by zle as read-only in this function's scope,
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# a nested function is required in order to shadow its built-in value;
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# see "User-defined widgets" in zshall.
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#
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() {
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local -h -r WIDGET=zle-line-finish
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_zsh_highlight
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}
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}
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_history-substring-search-zle-line-pre-redraw() {
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#
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# If the zsh-syntax-highlighting plugin has been loaded (after our plugin
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# plugin, otherwise this hook wouldn't be called), remove our hooks.
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#
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if [[ $+ZSH_HIGHLIGHT_VERSION -eq 1 ]]; then
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autoload -U add-zle-hook-widget
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add-zle-hook-widget -d zle-line-pre-redraw _history-substring-search-zle-line-pre-redraw
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add-zle-hook-widget -d zle-line-finish _history-substring-search-zle-line-finish
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return 0
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fi
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#
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# Set $? to 0 for _zsh_highlight. Without this, subsequent
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# zle-line-pre-redraw hooks won't run, since add-zle-hook-widget happens to
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# call us with $? == 1 in the common case.
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#
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true && _zsh_highlight "$@"
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}
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if [[ -o zle ]]; then
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add-zle-hook-widget zle-line-pre-redraw _history-substring-search-zle-line-pre-redraw
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add-zle-hook-widget zle-line-finish _history-substring-search-zle-line-finish
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fi
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else
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#
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# The following snippet was taken from the zsh-syntax-highlighting project:
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# https://github.com/zsh-users/zsh-syntax-highlighting/blob/56b134f5d62ae3d4e66c7f52bd0cc2595f9b305b/zsh-syntax-highlighting.zsh#L126-161
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#
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# SPDX-SnippetBegin
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# SPDX-License-Identifier: BSD-3-Clause
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# SPDX-SnippetCopyrightText: 2010-2011 zsh-syntax-highlighting contributors
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#--------------8<-------------------8<-------------------8<-----------------
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# Rebind all ZLE widgets to make them invoke _zsh_highlights.
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_zsh_highlight_bind_widgets()
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{
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# Load ZSH module zsh/zleparameter, needed to override user defined widgets.
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zmodload zsh/zleparameter 2>/dev/null || {
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echo 'zsh-syntax-highlighting: failed loading zsh/zleparameter.' >&2
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return 1
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}
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# Override ZLE widgets to make them invoke _zsh_highlight.
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local cur_widget
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for cur_widget in ${${(f)"$(builtin zle -la)"}:#(.*|_*|orig-*|run-help|which-command|beep|yank*)}; do
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case $widgets[$cur_widget] in
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# Already rebound event: do nothing.
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user:$cur_widget|user:_zsh_highlight_widget_*);;
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# User defined widget: override and rebind old one with prefix "orig-".
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user:*) eval "zle -N orig-$cur_widget ${widgets[$cur_widget]#*:}; \
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_zsh_highlight_widget_$cur_widget() { builtin zle orig-$cur_widget -- \"\$@\" && _zsh_highlight }; \
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zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
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# Completion widget: override and rebind old one with prefix "orig-".
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completion:*) eval "zle -C orig-$cur_widget ${${widgets[$cur_widget]#*:}/:/ }; \
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_zsh_highlight_widget_$cur_widget() { builtin zle orig-$cur_widget -- \"\$@\" && _zsh_highlight }; \
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zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
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# Builtin widget: override and make it call the builtin ".widget".
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builtin) eval "_zsh_highlight_widget_$cur_widget() { builtin zle .$cur_widget -- \"\$@\" && _zsh_highlight }; \
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zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
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# Default: unhandled case.
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*) echo "zsh-syntax-highlighting: unhandled ZLE widget '$cur_widget'" >&2 ;;
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esac
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done
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}
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#-------------->8------------------->8------------------->8-----------------
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# SPDX-SnippetEnd
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_zsh_highlight_bind_widgets
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fi
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unfunction _history-substring-search-function-callable
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fi
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_history-substring-search-begin() {
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setopt localoptions extendedglob
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_history_substring_search_refresh_display=
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_history_substring_search_query_highlight=
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#
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# If the buffer is the same as the previously displayed history substring
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# search result, then just keep stepping through the match list. Otherwise
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# start a new search.
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#
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if [[ -n $BUFFER && $BUFFER == ${_history_substring_search_result:-} ]]; then
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return;
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fi
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#
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# Clear the previous result.
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#
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_history_substring_search_result=''
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if [[ -z $BUFFER ]]; then
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#
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# If the buffer is empty, we will just act like up-history/down-history
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# in ZSH, so we do not need to actually search the history. This should
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# speed things up a little.
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#
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_history_substring_search_query=
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_history_substring_search_query_parts=()
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_history_substring_search_raw_matches=()
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else
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#
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# For the purpose of highlighting we keep a copy of the original
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# query string.
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#
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_history_substring_search_query=$BUFFER
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#
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# compose search pattern
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#
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if [[ -n $HISTORY_SUBSTRING_SEARCH_FUZZY ]]; then
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#
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# `=` split string in arguments
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#
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_history_substring_search_query_parts=(${=_history_substring_search_query})
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else
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_history_substring_search_query_parts=(${==_history_substring_search_query})
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fi
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#
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# Escape and join query parts with wildcard character '*' as seperator
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# `(j:CHAR:)` join array to string with CHAR as seperator
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#
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local search_pattern="${(j:*:)_history_substring_search_query_parts[@]//(#m)[\][()|\\*?#<>~^]/\\$MATCH}*"
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#
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# Support anchoring history search to the beginning of the command
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#
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if [[ -z $HISTORY_SUBSTRING_SEARCH_PREFIXED ]]; then
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search_pattern="*${search_pattern}"
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fi
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#
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# Find all occurrences of the search pattern in the history file.
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#
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# (k) returns the "keys" (history index numbers) instead of the values
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# (R) returns values in reverse older, so the index of the youngest
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# matching history entry is at the head of the list.
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#
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_history_substring_search_raw_matches=(${(k)history[(R)(#$HISTORY_SUBSTRING_SEARCH_GLOBBING_FLAGS)${search_pattern}]})
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fi
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#
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# In order to stay as responsive as possible, we will process the raw
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# matches lazily (when the user requests the next match) to choose items
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# that need to be displayed to the user.
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# _history_substring_search_raw_match_index holds the index of the last
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# unprocessed entry in _history_substring_search_raw_matches. Any items
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# that need to be displayed will be added to
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# _history_substring_search_matches.
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#
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# We use an associative array (_history_substring_search_unique_filter) as
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# a 'set' data structure to ensure uniqueness of the results if desired.
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# If an entry (key) is in the set (non-empty value), then we have already
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# added that entry to _history_substring_search_matches.
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#
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_history_substring_search_raw_match_index=0
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_history_substring_search_matches=()
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_history_substring_search_unique_filter=()
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#
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# If $_history_substring_search_match_index is equal to
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# $#_history_substring_search_matches + 1, this indicates that we
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# are beyond the end of $_history_substring_search_matches and that we
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# have also processed all entries in
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# _history_substring_search_raw_matches.
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#
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# If $#_history_substring_search_match_index is equal to 0, this indicates
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# that we are beyond the beginning of $_history_substring_search_matches.
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#
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# If we have initially pressed "up" we have to initialize
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# $_history_substring_search_match_index to 0 so that it will be
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# incremented to 1.
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#
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# If we have initially pressed "down" we have to initialize
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# $_history_substring_search_match_index to 1 so that it will be
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# decremented to 0.
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#
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if [[ $WIDGET == history-substring-search-down ]]; then
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_history_substring_search_match_index=1
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else
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_history_substring_search_match_index=0
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fi
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}
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_history-substring-search-end() {
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setopt localoptions extendedglob
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local highlight_memo=
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_history_substring_search_result=$BUFFER
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if [[ $_history_substring_search_zsh_5_9 -eq 1 ]]; then
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highlight_memo='memo=history-substring-search'
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fi
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# the search was successful so display the result properly by clearing away
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# existing highlights and moving the cursor to the end of the result buffer
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if [[ $_history_substring_search_refresh_display -eq 1 ]]; then
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if [[ -n $highlight_memo ]]; then
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region_highlight=( "${(@)region_highlight:#*${highlight_memo}*}" )
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else
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region_highlight=()
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fi
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CURSOR=${#BUFFER}
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fi
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# highlight command line using zsh-syntax-highlighting
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_zsh_highlight
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# highlight the search query inside the command line
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if [[ -n $_history_substring_search_query_highlight ]]; then
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# highlight first matching query parts
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local highlight_start_index=0
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local highlight_end_index=0
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local query_part
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for query_part in $_history_substring_search_query_parts; do
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local escaped_query_part=${query_part//(#m)[\][()|\\*?#<>~^]/\\$MATCH}
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# (i) get index of pattern
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local query_part_match_index="${${BUFFER:$highlight_start_index}[(i)(#$HISTORY_SUBSTRING_SEARCH_GLOBBING_FLAGS)${escaped_query_part}]}"
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if [[ $query_part_match_index -le ${#BUFFER:$highlight_start_index} ]]; then
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highlight_start_index=$(( $highlight_start_index + $query_part_match_index ))
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highlight_end_index=$(( $highlight_start_index + ${#query_part} ))
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region_highlight+=(
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"$(($highlight_start_index - 1)) $(($highlight_end_index - 1)) ${_history_substring_search_query_highlight}${highlight_memo:+,$highlight_memo}"
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)
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fi
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done
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fi
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# For debugging purposes:
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# zle -R "mn: "$_history_substring_search_match_index" m#: "${#_history_substring_search_matches}
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# read -k -t 200 && zle -U -- "$REPLY"
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#
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# When this function returns, z-sy-h runs its line-pre-redraw hook. It has no
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# logic for determining highlight priority, when two different memo= marked
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# region highlights overlap; instead, it always prioritises itself. Below is
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# a workaround for dealing with it.
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#
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if [[ $_history_substring_search_zsh_5_9 -eq 1 ]]; then
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zle -R
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#
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# After line redraw with desired highlight, wait for timeout or user input
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# before removing search highlight and exiting. This ensures no highlights
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# are left lingering after search is finished.
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#
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read -k -t ${HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_TIMEOUT:-1} && zle -U -- "$REPLY"
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region_highlight=( "${(@)region_highlight:#*${highlight_memo}*}" )
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fi
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# Exit successfully from the history-substring-search-* widgets.
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return 0
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}
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_history-substring-search-up-buffer() {
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#
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# Check if the UP arrow was pressed to move the cursor within a multi-line
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# buffer. This amounts to three tests:
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#
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# 1. $#buflines -gt 1.
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#
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# 2. $CURSOR -ne $#BUFFER.
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#
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# 3. Check if we are on the first line of the current multi-line buffer.
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# If so, pressing UP would amount to leaving the multi-line buffer.
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#
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# We check this by adding an extra "x" to $LBUFFER, which makes
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# sure that xlbuflines is always equal to the number of lines
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# until $CURSOR (including the line with the cursor on it).
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#
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local buflines XLBUFFER xlbuflines
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buflines=(${(f)BUFFER})
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XLBUFFER=$LBUFFER"x"
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xlbuflines=(${(f)XLBUFFER})
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if [[ $#buflines -gt 1 && $CURSOR -ne $#BUFFER && $#xlbuflines -ne 1 ]]; then
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zle up-line-or-history
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return 0
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fi
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return 1
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}
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_history-substring-search-down-buffer() {
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#
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# Check if the DOWN arrow was pressed to move the cursor within a multi-line
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# buffer. This amounts to three tests:
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#
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# 1. $#buflines -gt 1.
|
|
#
|
|
# 2. $CURSOR -ne $#BUFFER.
|
|
#
|
|
# 3. Check if we are on the last line of the current multi-line buffer.
|
|
# If so, pressing DOWN would amount to leaving the multi-line buffer.
|
|
#
|
|
# We check this by adding an extra "x" to $RBUFFER, which makes
|
|
# sure that xrbuflines is always equal to the number of lines
|
|
# from $CURSOR (including the line with the cursor on it).
|
|
#
|
|
local buflines XRBUFFER xrbuflines
|
|
buflines=(${(f)BUFFER})
|
|
XRBUFFER="x"$RBUFFER
|
|
xrbuflines=(${(f)XRBUFFER})
|
|
|
|
if [[ $#buflines -gt 1 && $CURSOR -ne $#BUFFER && $#xrbuflines -ne 1 ]]; then
|
|
zle down-line-or-history
|
|
return 0
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
|
|
_history-substring-search-up-history() {
|
|
#
|
|
# Behave like up in ZSH, except clear the $BUFFER
|
|
# when beginning of history is reached like in Fish.
|
|
#
|
|
if [[ -z $_history_substring_search_query ]]; then
|
|
|
|
# we have reached the absolute top of history
|
|
if [[ $HISTNO -eq 1 ]]; then
|
|
BUFFER=
|
|
|
|
# going up from somewhere below the top of history
|
|
else
|
|
zle up-line-or-history
|
|
fi
|
|
|
|
return 0
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
|
|
_history-substring-search-down-history() {
|
|
#
|
|
# Behave like down-history in ZSH, except clear the
|
|
# $BUFFER when end of history is reached like in Fish.
|
|
#
|
|
if [[ -z $_history_substring_search_query ]]; then
|
|
|
|
# going down from the absolute top of history
|
|
if [[ $HISTNO -eq 1 && -z $BUFFER ]]; then
|
|
BUFFER=${history[1]}
|
|
_history_substring_search_refresh_display=1
|
|
|
|
# going down from somewhere above the bottom of history
|
|
else
|
|
zle down-line-or-history
|
|
fi
|
|
|
|
return 0
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
|
|
_history_substring_search_process_raw_matches() {
|
|
#
|
|
# Process more outstanding raw matches and append any matches that need to
|
|
# be displayed to the user to _history_substring_search_matches.
|
|
# Return whether there were any more results appended.
|
|
#
|
|
|
|
#
|
|
# While we have more raw matches. Process them to see if there are any more
|
|
# matches that need to be displayed to the user.
|
|
#
|
|
while [[ $_history_substring_search_raw_match_index -lt $#_history_substring_search_raw_matches ]]; do
|
|
#
|
|
# Move on to the next raw entry and get its history index.
|
|
#
|
|
_history_substring_search_raw_match_index+=1
|
|
local index=${_history_substring_search_raw_matches[$_history_substring_search_raw_match_index]}
|
|
|
|
#
|
|
# If HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE is set to a non-empty value,
|
|
# then ensure that only unique matches are presented to the user.
|
|
# When HIST_IGNORE_ALL_DUPS is set, ZSH already ensures a unique history,
|
|
# so in this case we do not need to do anything.
|
|
#
|
|
if [[ ! -o HIST_IGNORE_ALL_DUPS && -n $HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE ]]; then
|
|
#
|
|
# Get the actual history entry at the new index, and check if we have
|
|
# already added it to _history_substring_search_matches.
|
|
#
|
|
local entry=${history[$index]}
|
|
|
|
if [[ -z ${_history_substring_search_unique_filter[$entry]} ]]; then
|
|
#
|
|
# This is a new unique entry. Add it to the filter and append the
|
|
# index to _history_substring_search_matches.
|
|
#
|
|
_history_substring_search_unique_filter[$entry]=1
|
|
_history_substring_search_matches+=($index)
|
|
|
|
#
|
|
# Indicate that we did find a match.
|
|
#
|
|
return 0
|
|
fi
|
|
|
|
else
|
|
#
|
|
# Just append the new history index to the processed matches.
|
|
#
|
|
_history_substring_search_matches+=($index)
|
|
|
|
#
|
|
# Indicate that we did find a match.
|
|
#
|
|
return 0
|
|
fi
|
|
|
|
done
|
|
|
|
#
|
|
# We are beyond the end of the list of raw matches. Indicate that no
|
|
# more matches are available.
|
|
#
|
|
return 1
|
|
}
|
|
|
|
_history-substring-search-has-next() {
|
|
#
|
|
# Predicate function that returns whether any more older matches are
|
|
# available.
|
|
#
|
|
|
|
if [[ $_history_substring_search_match_index -lt $#_history_substring_search_matches ]]; then
|
|
#
|
|
# We did not reach the end of the processed list, so we do have further
|
|
# matches.
|
|
#
|
|
return 0
|
|
|
|
else
|
|
#
|
|
# We are at the end of the processed list. Try to process further
|
|
# unprocessed matches. _history_substring_search_process_raw_matches
|
|
# returns whether any more matches were available, so just return
|
|
# that result.
|
|
#
|
|
_history_substring_search_process_raw_matches
|
|
return $?
|
|
fi
|
|
}
|
|
|
|
_history-substring-search-has-prev() {
|
|
#
|
|
# Predicate function that returns whether any more younger matches are
|
|
# available.
|
|
#
|
|
|
|
if [[ $_history_substring_search_match_index -gt 1 ]]; then
|
|
#
|
|
# We did not reach the beginning of the processed list, so we do have
|
|
# further matches.
|
|
#
|
|
return 0
|
|
|
|
else
|
|
#
|
|
# We are at the beginning of the processed list. We do not have any more
|
|
# matches.
|
|
#
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
_history-substring-search-found() {
|
|
#
|
|
# A match is available. The index of the match is held in
|
|
# $_history_substring_search_match_index
|
|
#
|
|
# 1. Make $BUFFER equal to the matching history entry.
|
|
#
|
|
# 2. Use $HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
|
|
# to highlight the current buffer.
|
|
#
|
|
BUFFER=$history[$_history_substring_search_matches[$_history_substring_search_match_index]]
|
|
_history_substring_search_query_highlight=$HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_FOUND
|
|
}
|
|
|
|
_history-substring-search-not-found() {
|
|
#
|
|
# No more matches are available.
|
|
#
|
|
# 1. Make $BUFFER equal to $_history_substring_search_query so the user can
|
|
# revise it and search again.
|
|
#
|
|
# 2. Use $HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_NOT_FOUND
|
|
# to highlight the current buffer.
|
|
#
|
|
BUFFER=$_history_substring_search_query
|
|
_history_substring_search_query_highlight=$HISTORY_SUBSTRING_SEARCH_HIGHLIGHT_NOT_FOUND
|
|
}
|
|
|
|
_history-substring-search-up-search() {
|
|
_history_substring_search_refresh_display=1
|
|
|
|
#
|
|
# Select history entry during history-substring-down-search:
|
|
#
|
|
# The following variables have been initialized in
|
|
# _history-substring-search-up/down-search():
|
|
#
|
|
# $_history_substring_search_matches is the current list of matches that
|
|
# need to be displayed to the user.
|
|
# $_history_substring_search_match_index is the index of the current match
|
|
# that is being displayed to the user.
|
|
#
|
|
# The range of values that $_history_substring_search_match_index can take
|
|
# is: [0, $#_history_substring_search_matches + 1]. A value of 0
|
|
# indicates that we are beyond the beginning of
|
|
# $_history_substring_search_matches. A value of
|
|
# $#_history_substring_search_matches + 1 indicates that we are beyond
|
|
# the end of $_history_substring_search_matches and that we have also
|
|
# processed all entries in _history_substring_search_raw_matches.
|
|
#
|
|
# If $_history_substring_search_match_index equals
|
|
# $#_history_substring_search_matches and
|
|
# $_history_substring_search_raw_match_index is not greater than
|
|
# $#_history_substring_search_raw_matches, then we need to further process
|
|
# $_history_substring_search_raw_matches to see if there are any more
|
|
# entries that need to be displayed to the user.
|
|
#
|
|
# In _history-substring-search-up-search() the initial value of
|
|
# $_history_substring_search_match_index is 0. This value is set in
|
|
# _history-substring-search-begin(). _history-substring-search-up-search()
|
|
# will initially increment it to 1.
|
|
#
|
|
|
|
if [[ $_history_substring_search_match_index -gt $#_history_substring_search_matches ]]; then
|
|
#
|
|
# We are beyond the end of $_history_substring_search_matches. This
|
|
# can only happen if we have also exhausted the unprocessed matches in
|
|
# _history_substring_search_raw_matches.
|
|
#
|
|
# 1. Update display to indicate search not found.
|
|
#
|
|
_history-substring-search-not-found
|
|
return
|
|
fi
|
|
|
|
if _history-substring-search-has-next; then
|
|
#
|
|
# We do have older matches.
|
|
#
|
|
# 1. Move index to point to the next match.
|
|
# 2. Update display to indicate search found.
|
|
#
|
|
_history_substring_search_match_index+=1
|
|
_history-substring-search-found
|
|
|
|
else
|
|
#
|
|
# We do not have older matches.
|
|
#
|
|
# 1. Move the index beyond the end of
|
|
# _history_substring_search_matches.
|
|
# 2. Update display to indicate search not found.
|
|
#
|
|
_history_substring_search_match_index+=1
|
|
_history-substring-search-not-found
|
|
fi
|
|
|
|
#
|
|
# When HIST_FIND_NO_DUPS is set, meaning that only unique command lines from
|
|
# history should be matched, make sure the new and old results are different.
|
|
#
|
|
# However, if the HIST_IGNORE_ALL_DUPS shell option, or
|
|
# HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE is set, then we already have a
|
|
# unique history, so in this case we do not need to do anything.
|
|
#
|
|
if [[ -o HIST_IGNORE_ALL_DUPS || -n $HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE ]]; then
|
|
return
|
|
fi
|
|
|
|
if [[ -o HIST_FIND_NO_DUPS && $BUFFER == $_history_substring_search_result ]]; then
|
|
#
|
|
# Repeat the current search so that a different (unique) match is found.
|
|
#
|
|
_history-substring-search-up-search
|
|
fi
|
|
}
|
|
|
|
_history-substring-search-down-search() {
|
|
_history_substring_search_refresh_display=1
|
|
|
|
#
|
|
# Select history entry during history-substring-down-search:
|
|
#
|
|
# The following variables have been initialized in
|
|
# _history-substring-search-up/down-search():
|
|
#
|
|
# $_history_substring_search_matches is the current list of matches that
|
|
# need to be displayed to the user.
|
|
# $_history_substring_search_match_index is the index of the current match
|
|
# that is being displayed to the user.
|
|
#
|
|
# The range of values that $_history_substring_search_match_index can take
|
|
# is: [0, $#_history_substring_search_matches + 1]. A value of 0
|
|
# indicates that we are beyond the beginning of
|
|
# $_history_substring_search_matches. A value of
|
|
# $#_history_substring_search_matches + 1 indicates that we are beyond
|
|
# the end of $_history_substring_search_matches and that we have also
|
|
# processed all entries in _history_substring_search_raw_matches.
|
|
#
|
|
# In _history-substring-search-down-search() the initial value of
|
|
# $_history_substring_search_match_index is 1. This value is set in
|
|
# _history-substring-search-begin(). _history-substring-search-down-search()
|
|
# will initially decrement it to 0.
|
|
#
|
|
|
|
if [[ $_history_substring_search_match_index -lt 1 ]]; then
|
|
#
|
|
# We are beyond the beginning of $_history_substring_search_matches.
|
|
#
|
|
# 1. Update display to indicate search not found.
|
|
#
|
|
_history-substring-search-not-found
|
|
return
|
|
fi
|
|
|
|
if _history-substring-search-has-prev; then
|
|
#
|
|
# We do have younger matches.
|
|
#
|
|
# 1. Move index to point to the previous match.
|
|
# 2. Update display to indicate search found.
|
|
#
|
|
_history_substring_search_match_index+=-1
|
|
_history-substring-search-found
|
|
|
|
else
|
|
#
|
|
# We do not have younger matches.
|
|
#
|
|
# 1. Move the index beyond the beginning of
|
|
# _history_substring_search_matches.
|
|
# 2. Update display to indicate search not found.
|
|
#
|
|
_history_substring_search_match_index+=-1
|
|
_history-substring-search-not-found
|
|
fi
|
|
|
|
#
|
|
# When HIST_FIND_NO_DUPS is set, meaning that only unique command lines from
|
|
# history should be matched, make sure the new and old results are different.
|
|
#
|
|
# However, if the HIST_IGNORE_ALL_DUPS shell option, or
|
|
# HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE is set, then we already have a
|
|
# unique history, so in this case we do not need to do anything.
|
|
#
|
|
if [[ -o HIST_IGNORE_ALL_DUPS || -n $HISTORY_SUBSTRING_SEARCH_ENSURE_UNIQUE ]]; then
|
|
return
|
|
fi
|
|
|
|
if [[ -o HIST_FIND_NO_DUPS && $BUFFER == $_history_substring_search_result ]]; then
|
|
#
|
|
# Repeat the current search so that a different (unique) match is found.
|
|
#
|
|
_history-substring-search-down-search
|
|
fi
|
|
}
|
|
|
|
# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
|
|
# vim: ft=zsh sw=2 ts=2 et
|