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Cursor move throttling for better performance #40

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Cursor move throttling for better performance #40

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41 changes: 39 additions & 2 deletions autoload/MatchTagAlways.vim
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Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,39 @@
" You should have received a copy of the GNU General Public License
" along with MatchTagAlways. If not, see <http://www.gnu.org/licenses/>.

function! LongEnough( timer, delay, ... )
let result = 0
let suppressionCount = 0
if ( exists( 'a:1' ) )
let suppressionCount = a:1
endif
" This is the first time we're being called.
if ( !exists( a:timer ) )
let result = 1
else
let timeElapsed = localtime() - {a:timer}
" If it's been a while...
if ( timeElapsed >= a:delay )
let result = 1
elseif ( suppressionCount > 0 )
let {a:timer}_callCount += 1
" It hasn't been a while, but the number of times we have been called has hit the suppression limit, so we activate
" anyway.
if ( {a:timer}_callCount >= suppressionCount )
let result = 1
endif
endif
endif
" Reset both the timer and the number of times we've been called since the last update.
if ( result )
let {a:timer} = localtime()
let {a:timer}_callCount = 0
endif
return result
endfunction

let s:script_folder_path = escape( expand( '<sfile>:p:h' ), '\' )

if has('python')
" Python 2
py import sys
Expand Down Expand Up @@ -51,15 +82,21 @@ function! MatchTagAlways#Setup()
endif

augroup matchtagalways
autocmd! CursorMoved,CursorMovedI,WinEnter <buffer>
\ call s:HighlightEnclosingTagsIfPossible()
autocmd! CursorMoved,CursorMovedI,WinEnter <buffer> call s:RunHighLightEnclosingTag()
autocmd! CursorHold,CursorHoldI <buffer> call s:HighlightEnclosingTagsIfPossible()
augroup END

if !g:mta_use_matchparen_group && g:mta_set_default_matchtag_color
hi MatchTag ctermfg=black ctermbg=lightblue guifg=black guibg=lightblue
endif
endfunction

function! s:RunHighLightEnclosingTag()
" debounce
if LongEnough("s:countDebaunce", 1, 4)
call s:HighlightEnclosingTagsIfPossible()
endif
endfunction

function! s:HighlightEnclosingTagsIfPossible()
" Remove any previous highlighting.
Expand Down