Moving formating ultils to buffer module

- moving formating utils to buffer module to make it easier to interact
and test

1 files changed, 29 insertions, 0 deletions

diff --git a/autoload/prettier/utils/buffer.vim b/autoload/prettier/utils/buffer.vim
new file mode 100644
index 0000000..06fd7ff
--- /dev/null
+++ b/autoload/prettier/utils/buffer.vim
@@ -0,0 +1,29 @@
+function! prettier#utils#buffer#replace(lines, startSelection, endSelection) abort
+  " store view
+  let l:winview = winsaveview()
+  let l:newBuffer = prettier#utils#buffer#createBufferFromUpdatedLines(a:lines, a:startSelection, a:endSelection)
+
+  " we should not replace contents if the newBuffer is empty
+  if empty(l:newBuffer)
+    return
+  endif
+
+  " delete all lines on the current buffer
+  silent! execute len(l:newBuffer) . ',' . line('$') . 'delete _'
+
+  " replace all lines from the current buffer with output from prettier
+  call setline(1, l:newBuffer)
+
+  " Restore view
+  call winrestview(l:winview)
+endfunction
+
+" Returns 1 if content has changed
+function! prettier#utils#buffer#willUpdatedLinesChangeBuffer(lines, start, end) abort
+  return getbufline(bufnr('%'), 1, line('$')) == prettier#utils#buffer#createBufferFromUpdatedLines(a:lines, a:start, a:end) ? 0 : 1
+endfunction
+
+" Returns a new buffer with lines replacing start and end of the contents of the current buffer
+function! prettier#utils#buffer#createBufferFromUpdatedLines(lines, start, end) abort
+  return getbufline(bufnr('%'), 1, a:start - 1) + a:lines + getbufline(bufnr('%'), a:end + 1, '$')
+endfunction