General refactoring of functions and adding comments
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@ -1,6 +1,9 @@
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" ==============================================================================
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" File: highlight.vim
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" Maintainer: Joshua Potter <jrpotter2112@gmail.com>
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" Comment: For the sake of distinguishing between vim *:reg*isters and
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" highlight registers used in the given script, we use register
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" to describe the former and h_register to describe the latter.
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"
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" ==============================================================================
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@ -9,15 +12,15 @@
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" s:active_register :: String {{{2
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" ------------------------------------------------------------------------------
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" The register currently active. This defaults to the unnamed register.
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" The h_register currently active. This defaults to the unnamed register.
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let s:active_register = "\""
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" s:registry :: { String : { String : Match } } {{{2
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" ------------------------------------------------------------------------------
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" The keys of the outer dictionary are any active registers (that is, before a
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" call to clear register is called). By default, this will be set to be
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" The keys of the outer dictionary are any active h_registers (that is, before a
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" call to ClearRegister is called). By default, this will be set to be
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" populated with at least g:highlight_registry once the plugin is loaded.
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"
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" The corresponding values of the outer dictionary is a key value pairing of a
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@ -32,11 +35,13 @@ let s:registry = {}
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" Convenience method used to make the mappings in plugin/highlight.vim a bit
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" easier to read through. The passed flag can be:
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"
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" c) Indicates the current word, with word boundary.
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" g) Indicates the current word, without word boundary.
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" v) Indicates the current visual selection.
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" c: Indicates the current word, with word boundary.
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" g: Indicates the current word, without word boundary.
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" v: Indicates the current visual selection.
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"
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" Throws an error otherwise.
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function! highlight#expand_flag(a:flag) abort
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function! highlight#expand_flag(flag) abort
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if a:flag ==# 'c'
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return '\<' . expand('<cword>') . '\>'
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elseif a:flag ==# 'g'
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@ -65,6 +70,7 @@ endfunction
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" FUNCTION: GetVisualSelection {{{1
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" ==============================================================================
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" Borrowed from http://stackoverflow.com/a/6271254/794380.
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function! highlight#get_visual_selection()
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let [lnum1, col1] = getpos("'<")[1:2]
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@ -85,25 +91,26 @@ endfunction
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" call airline#parts#define_minwidth('foo', 50)
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" let g:airline_section_y = airline#section#create_right(['ffenc', 'foo'])
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function! highlight#statusline(...)
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let l:group_name = highlight#get_group_name(s:active_register)
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" If airline is defined, this function should be called in the context of
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" airline#parts#define_function('foo', 'highlight#airline_status'). Thus it
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" should be sufficient to check that airline#parts#define_accent exists to
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" ensure airline is defined.
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if a:0 > 0 && exists('*airline#parts#define_accent')
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call airline#parts#define_accent(a:1, l:group_name)
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return airline#section#create_right([a:1])
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else
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return '%#' . l:group_name . '#xxx (" . s:active_register . ")%*'
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endif
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endfunction
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" TODO(jrpotter): Polish and test
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" function! highlight#statusline(...)
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" let l:group_name = highlight#get_group_name(s:active_register)
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" " If airline is defined, this function should be called in the context of
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" " airline#parts#define_function('foo', 'highlight#airline_status'). Thus it
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" " should be sufficient to check that airline#parts#define_accent exists to
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" " ensure airline is defined.
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" if a:0 > 0 && exists('*airline#parts#define_accent')
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" call airline#parts#define_accent(a:1, l:group_name)
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" return airline#section#create_right([a:1])
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" else
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" return '%#' . l:group_name . '#xxx (" . s:active_register . ")%*'
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" endif
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" endfunction
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" FUNCTION: GetGroupName(reg) {{{1
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" ==============================================================================
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" Note group names are not allowed to have special characters; they
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" must be alphanumeric or underscores.
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" Group names are not allowed to have special characters; they must be
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" alphanumeric or underscores.
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function! highlight#get_group_name(reg)
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return 'highlight_registry_' . char2nr(a:reg)
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@ -112,51 +119,24 @@ endfunction
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" FUNCTION: InitRegister() {{{1
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" ==============================================================================
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" Setups the group and highlighting. Matches are added afterward.
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" Sets up the highlight group. This must be called before any attempts to add
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" matches to a given h_register is performed.
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function! highlight#init_register(reg, color)
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call highlight#clear_register(a:reg)
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" TODO(jrpotter): Mirror current Search group
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exe 'hi ' . highlight#get_group_name(a:reg) .
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\ ' cterm=bold,underline ctermfg=' . a:color
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endfunction
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" FUNCTION: ClearRegister() {{{1
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" ==============================================================================
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" Used to clear out the 'registers' that are used to hold which values are
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" highlighted under a certain match group.
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function! highlight#clear_register(reg)
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exe 'hi clear ' . highlight#get_group_name(a:reg)
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if has_key(s:registry, a:reg)
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for key in keys(s:registry[a:reg])
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silent! call matchdelete(s:registry[a:reg][key])
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unlet s:registry[a:reg][key]
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endfor
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unlet s:registry[a:reg]
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endif
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call highlight#activate_register(a:reg)
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endfunction
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" FUNCTION: ClearAllRegisters() {{{1
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" ==============================================================================
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function! highlight#clear_all_registers()
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for key in keys(g:highlight_registry)
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call highlight#init_register(key, g:highlight_registry[key])
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endfor
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for key in keys(s:registry)
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if !has_key(g:highlight_registry, key)
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call highlight#clear_register(key)
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endif
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endfor
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let s:registry[a:reg] = {}
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endfunction
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" FUNCTION: ActivateRegister() {{{1
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" ==============================================================================
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" We must actively set the search register to perform searches as expected.
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" Places the contents of a highlight register into the search register and links
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" the Search highlight group to the highlight group name. Activation of an
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" h_register that has not yet been initialized is allowed - in this case, the
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" search register is simply cleared.
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function! highlight#activate_register(reg)
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let s:active_register = a:reg
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@ -174,40 +154,81 @@ function! highlight#activate_register(reg)
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endfunction
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" FUNCTION: AppendToSearch(pattern) {{{1
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" FUNCTION: AppendToSearch(reg, flag) {{{1
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" ==============================================================================
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" Extends the current matches of h_register reg with the pattern found once flag
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" is expanded. If the h_register specified has not yet been initialized, simply
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" create a new h_register and continue.
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function! highlight#append_to_search(reg, pattern)
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if len(a:pattern) == 0
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return
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endif
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function! highlight#append_to_search(reg, flag)
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let l:pattern = highlight#expand_flag(a:flag)
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if len(l:pattern) > 0
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if !has_key(s:registry, a:reg)
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" TODO(jrpotter): Change to one of least used color.
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" TODO(jrpotter): Choose color better.
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call highlight#init_register(a:reg, 'Yellow')
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let s:registry[a:reg] = {}
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endif
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" Don't want to add multiple match objects into registry
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if !has_key(s:registry[a:reg], a:pattern)
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let s:registry[a:reg][a:pattern] =
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\ matchadd(highlight#get_group_name(a:reg), a:pattern)
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if !has_key(s:registry[a:reg], l:pattern)
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let s:registry[a:reg][l:pattern] =
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\ matchadd(highlight#get_group_name(a:reg), l:pattern)
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endif
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" Updates the search register
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call highlight#activate_register(a:reg)
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endif
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endfunction
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" FUNCTION: RemoveFromSearch(reg, flag) {{{1
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" ==============================================================================
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" Removes the given pattern found once flag is expanded from the passed
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" h_register reg. If the h_register will be emptied as a result of this call,
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" instead delegating to clearing out the register instead.
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function! highlight#remove_from_search(reg, flag)
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let l:pattern = highlight#expand_flag(a:flag)
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if has_key(s:registry, a:reg) && has_key(s:registry[a:reg], l:pattern)
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if len(s:registry[a:reg] == 1)
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call highlight#clear_register(a:reg)
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else
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silent! call matchdelete(s:registry[a:reg][l:pattern])
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unlet s:registry[a:reg][l:pattern]
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endif
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endif
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" Updates the search register
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call highlight#activate_register(a:reg)
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endfunction
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" FUNCTION: RemoveFromSearch(pattern) {{{1
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" FUNCTION: ClearRegister(reg) {{{1
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" ==============================================================================
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" Used to clear out the h_register reg and potentially unlink the Search
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" highlight group.
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function! highlight#remove_from_search(reg, pattern)
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function! highlight#clear_register(reg)
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exe 'hi clear ' . highlight#get_group_name(a:reg)
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if has_key(s:registry, a:reg)
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if has_key(s:registry[a:reg], a:pattern)
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call matchdelete(s:registry[a:reg][a:pattern])
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unlet s:registry[a:reg][a:pattern]
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if len(s:registry[a:reg]) == 0
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for key in keys(s:registry[a:reg])
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silent! call matchdelete(s:registry[a:reg][key])
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unlet s:registry[a:reg][key]
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endfor
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unlet s:registry[a:reg]
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endif
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if a:reg ==# s:active_register
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hi! link Search NONE
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endif
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endif
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call highlight#activate_register(a:reg)
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endfunction
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" FUNCTION: Reset() {{{1
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" ==============================================================================
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" Used to reset the state of all h_register's.
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function! highlight#reset()
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for key in keys(s:registry)
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call highlight#clear_register(key)
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endfor
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for [key, value] in items(g:highlight_registry)
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call highlight#init_register(key, value)
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endfor
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endfunction
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@ -39,34 +39,31 @@ endif
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" MAPPINGS: {{{1
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" ==============================================================================
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let s:word = 'expand("<cword>")'
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let s:cword = '\<expand(<cword>)\>'
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let s:vword = 'highlight#get_visual_selection()'
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" Append Searches
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noremap <Plug>HRegistry_AppendToSearch
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\ :call highlight#append_to_search(v:register, 'c')<Bar>
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\ call highlight#count_pattern(eval(s:cword))<CR>
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\ call highlight#count_pattern('c')<CR>
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noremap <Plug>HRegistry_GAppendToSearch
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\ :call highlight#append_to_search(v:register, 'g')<Bar>
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\ call highlight#count_pattern(eval(s:word))<CR>
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\ call highlight#count_pattern('g')<CR>
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noremap <Plug>HRegistry_VisualAppendToSearch
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\ :call highlight#append_to_search(v:register, 'v')<Bar>
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\ call highlight#count_pattern(eval(s:vword))<CR>
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\ call highlight#count_pattern('v')<CR>
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" Remove Searches
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noremap <Plug>HRegistry_RemoveFromSearch
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\ :call highlight#remove_from_search(v:register, '\<'.expand('<cword>').'\>')<CR>
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\ :call highlight#remove_from_search(v:register, 'c')<CR>
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noremap <Plug>HRegistry_VisualRemoveFromSearch
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\ :call highlight#remove_from_search(v:register, highlight#get_visual_selection())<CR>
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\ :call highlight#remove_from_search(v:register, 'v')<CR>
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" Other Modifications
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noremap <Plug>HRegistry_ClearRegister
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\ :call highlight#clear_register(v:register)<CR>
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\ :call highlight#clear_register(v:register)<Bar>
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\ call highlight#activate_register(v:register)<CR>
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noremap <Plug>HRegistry_ActivateRegister
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\ :call highlight#activate_register(v:register)<CR>
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noremap <Plug>HRegistry_CountLastSeen
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\ :call highlight#count_pattern('\<'.expand('<cword>').'\>')<CR>
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\ :call highlight#count_pattern('c')<CR>
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" Normal Mappings
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nmap <silent> & <Plug>HRegistry_AppendToSearch
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@ -91,15 +88,10 @@ vmap <silent> # &N<Plug>HRegistry_CountLastSeen
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" PROCEDURE: Commands {{1
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" ==============================================================================
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function! s:ClearHighlightRegistry()
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call highlight#clear_all_registers()
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endfunction
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command ClearHighlightRegistry :call <SID>ClearHighlightRegistry()
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command ClearHighlightRegistry :call highlight#reset()
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" PROCEDURE: Initialize {{{1
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" ==============================================================================
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call s:ClearHighlightRegistry()
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call highlight#append_to_search(v:register, @/)
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call highlight#reset()
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