perf(highlight): increase number of highlights (#5208)

autoload/coc/highlight.vim

@@ -5,7 +5,7 @@ let s:namespace_map = {}
 let s:ns_id = 1
 let s:diagnostic_hlgroups = ['CocErrorHighlight', 'CocWarningHighlight', 'CocInfoHighlight', 'CocHintHighlight', 'CocDeprecatedHighlight', 'CocUnusedHighlight']
 " Maximum count to highlight each time.
-let g:coc_highlight_maximum_count = get(g:, 'coc_highlight_maximum_count', 200)
+let g:coc_highlight_maximum_count = get(g:, 'coc_highlight_maximum_count', 500)
 let s:term = &termguicolors == 0 && !has('gui_running')
 
 " Update buffer region by region.

doc/coc.txt

@@ -124,7 +124,7 @@ And run: >
 For other plugin managers, make sure to use the release branch (unless you
 need to build from typescript source code).
 
-To use Vim's native |packages| on Linux or MaxOS, use script like: >
+To use Vim's native |packages| on Linux or macOS, use script like: >
 
   #!/bin/sh
   # for vim8
@@ -1877,7 +1877,7 @@ g:coc_highlight_maximum_count 				*g:coc_highlight_maximum_count*
 	When highlight items exceed maximum count, highlight items will be
 	grouped and added by using |timer_start| for better user experience.
 
-	Default `200`
+	Default `500`
 
 g:coc_default_semantic_highlight_groups 		*g:coc_default_semantic_highlight_groups*
 

src/handler/semanticTokens/buffer.ts

@@ -388,8 +388,8 @@ export default class SemanticTokensBuffer implements SyncItem {
     if (token.isCancellationRequested || spans.length === 0) return
     let height = workspace.env.lines
     spans.forEach(o => {
-      o[0] = Math.max(0, Math.floor(o[0] - height / 2))
-      o[1] = Math.min(lineCount, Math.ceil(o[1] + height / 2))
+      o[0] = Math.max(0, Math.floor(o[0] - height))
+      o[1] = Math.min(lineCount, Math.ceil(o[1] + height))
     })
     for (let [start, end] of Regions.mergeSpans(spans)) {
       if (!skipCheck && regions.has(start, end)) continue