diff options
Diffstat (limited to 'language-web/src/main/js/xtext/HighlightingService.ts')
-rw-r--r-- | language-web/src/main/js/xtext/HighlightingService.ts | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/language-web/src/main/js/xtext/HighlightingService.ts b/language-web/src/main/js/xtext/HighlightingService.ts new file mode 100644 index 00000000..fc3e9e53 --- /dev/null +++ b/language-web/src/main/js/xtext/HighlightingService.ts | |||
@@ -0,0 +1,43 @@ | |||
1 | import type { EditorStore } from '../editor/EditorStore'; | ||
2 | import type { IHighlightRange } from '../editor/semanticHighlighting'; | ||
3 | import type { UpdateService } from './UpdateService'; | ||
4 | import { getLogger } from '../utils/logger'; | ||
5 | import { isHighlightingResult } from './xtextServiceResults'; | ||
6 | |||
7 | const log = getLogger('xtext.ValidationService'); | ||
8 | |||
9 | export class HighlightingService { | ||
10 | private readonly store: EditorStore; | ||
11 | |||
12 | private readonly updateService: UpdateService; | ||
13 | |||
14 | constructor(store: EditorStore, updateService: UpdateService) { | ||
15 | this.store = store; | ||
16 | this.updateService = updateService; | ||
17 | } | ||
18 | |||
19 | onPush(push: unknown): void { | ||
20 | if (!isHighlightingResult(push)) { | ||
21 | log.error('Invalid highlighting result', push); | ||
22 | return; | ||
23 | } | ||
24 | const allChanges = this.updateService.computeChangesSinceLastUpdate(); | ||
25 | const ranges: IHighlightRange[] = []; | ||
26 | push.regions.forEach(({ offset, length, styleClasses }) => { | ||
27 | if (styleClasses.length === 0) { | ||
28 | return; | ||
29 | } | ||
30 | const from = allChanges.mapPos(offset); | ||
31 | const to = allChanges.mapPos(offset + length); | ||
32 | if (to <= from) { | ||
33 | return; | ||
34 | } | ||
35 | ranges.push({ | ||
36 | from, | ||
37 | to, | ||
38 | classes: styleClasses, | ||
39 | }); | ||
40 | }); | ||
41 | this.store.updateSemanticHighlighting(ranges); | ||
42 | } | ||
43 | } | ||