476 lines
17 KiB
TypeScript
476 lines
17 KiB
TypeScript
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'use strict'
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import { Buffer, Neovim } from '@chemzqm/neovim'
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import debounce from 'debounce'
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import { CancellationToken, CancellationTokenSource, Emitter, Event, Range, SemanticTokens, SemanticTokensDelta, SemanticTokensLegend, uinteger } from 'vscode-languageserver-protocol'
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import languages from '../../languages'
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import { SyncItem } from '../../model/bufferSync'
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import Document from '../../model/document'
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import Regions from '../../model/regions'
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import { HighlightItem } from '../../types'
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import { wait, waitImmediate } from '../../util/index'
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import { byteIndex, upperFirst } from '../../util/string'
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import window from '../../window'
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import workspace from '../../workspace'
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const logger = require('../../util/logger')('semanticTokens-buffer')
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const yieldEveryMilliseconds = 15
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export const HLGROUP_PREFIX = 'CocSem'
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export const NAMESPACE = 'semanticTokens'
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export type TokenRange = [number, number, number] // line, startCol, endCol
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export interface SemanticTokensConfig {
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filetypes: string[]
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highlightPriority: number
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incrementTypes: string[]
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combinedModifiers: string[]
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highlightGroups?: string[]
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}
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export interface SemanticTokenRange {
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range: TokenRange
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tokenType: string
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tokenModifiers: string[]
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hlGroup?: string
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combine: boolean
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}
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interface SemanticTokensPreviousResult {
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readonly version: number
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readonly resultId: string | undefined,
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readonly tokens?: uinteger[],
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}
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interface RangeHighlights {
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highlights: SemanticTokenRange[]
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/**
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* 0 based
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*/
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start: number
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/**
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* 0 based exclusive
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*/
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end: number
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}
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// should be higher than document debounce
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const debounceInterval = 50
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export default class SemanticTokensBuffer implements SyncItem {
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private _highlights: [number, SemanticTokenRange[]]
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private _dirty = false
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private _version: number | undefined
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private regions = new Regions()
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private tokenSource: CancellationTokenSource
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private rangeTokenSource: CancellationTokenSource
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private previousResults: SemanticTokensPreviousResult | undefined
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private readonly _onDidRefresh = new Emitter<void>()
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public readonly onDidRefresh: Event<void> = this._onDidRefresh.event
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public highlight: Function & { clear(): void }
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constructor(
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private nvim: Neovim,
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private doc: Document,
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private readonly config: SemanticTokensConfig) {
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this.highlight = debounce(() => {
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void this.doHighlight()
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}, debounceInterval)
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this.highlight()
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}
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public get bufnr(): number {
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return this.doc.bufnr
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}
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public onChange(): void {
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this.highlight()
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}
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public onTextChange(): void {
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this.cancel()
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}
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public async forceHighlight(): Promise<void> {
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this.previousResults = undefined
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this._highlights = undefined
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this.clearHighlight()
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this.cancel()
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await this.doHighlight(true)
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}
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public async onShown(): Promise<void> {
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// Should be refreshed by onCursorMoved
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if (this.shouldRangeHighlight) return
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const { doc } = this
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if (doc.dirty || doc.version === this._version) return
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await this.doHighlight(false, true)
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}
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public get hasProvider(): boolean {
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let { textDocument } = this.doc
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return languages.hasProvider('semanticTokens', textDocument) || languages.hasProvider('semanticTokensRange', textDocument)
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}
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private get hasLegend(): boolean {
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let { textDocument } = this.doc
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return languages.getLegend(textDocument) != null || languages.getLegend(textDocument, true) != null
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}
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public get rangeProviderOnly(): boolean {
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let { textDocument } = this.doc
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return !languages.hasProvider('semanticTokens', textDocument) && languages.hasProvider('semanticTokensRange', textDocument)
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}
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public get shouldRangeHighlight(): boolean {
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let { textDocument } = this.doc
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return languages.hasProvider('semanticTokensRange', textDocument) && this.previousResults == null
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}
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private get lineCount(): number {
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return this.doc.lineCount
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}
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/**
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* Get current highlight items
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*/
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public get highlights(): ReadonlyArray<SemanticTokenRange> | undefined {
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if (!this._highlights) return undefined
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if (this._highlights[0] == this.doc.version) return this._highlights[1]
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return undefined
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}
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private get buffer(): Buffer {
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return this.nvim.createBuffer(this.bufnr)
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}
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public get enabled(): boolean {
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if (!this.config.filetypes.length) return false
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if (!workspace.env.updateHighlight) return false
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if (!this.doc?.attached) return false
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if (!this.hasLegend) return false
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if (!this.config.filetypes.includes('*') && !this.config.filetypes.includes(this.doc.filetype)) return false
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return this.hasProvider
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}
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public checkState(): void {
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if (!workspace.env.updateHighlight) {
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throw new Error(`Can't perform highlight update, highlight update requires vim >= 8.1.1719 or neovim >= 0.5.0`)
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}
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if (!this.doc.attached) throw new Error('Document not attached')
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let { filetypes } = this.config
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if (!filetypes?.includes('*') && !filetypes.includes(this.doc.filetype)) {
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throw new Error(`Semantic tokens highlight not enabled for current filetype: ${this.doc.filetype}`)
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}
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if (!this.hasProvider) throw new Error('SemanticTokens provider not found, your languageserver may not support it')
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}
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private async getTokenRanges(
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tokens: number[],
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legend: SemanticTokensLegend,
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token: CancellationToken): Promise<SemanticTokenRange[] | null> {
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let currentLine = 0
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let currentCharacter = 0
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let tickStart = Date.now()
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let highlights: SemanticTokenRange[] = []
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for (let i = 0; i < tokens.length; i += 5) {
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if (Date.now() - tickStart > yieldEveryMilliseconds) {
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await waitImmediate()
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if (token.isCancellationRequested) break
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tickStart = Date.now()
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}
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const deltaLine = tokens[i]
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const deltaStartCharacter = tokens[i + 1]
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const length = tokens[i + 2]
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const tokenType = legend.tokenTypes[tokens[i + 3]]
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const tokenModifiers = legend.tokenModifiers.filter((_, m) => tokens[i + 4] & (1 << m))
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const lnum = currentLine + deltaLine
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const startCharacter = deltaLine === 0 ? currentCharacter + deltaStartCharacter : deltaStartCharacter
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const endCharacter = startCharacter + length
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currentLine = lnum
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currentCharacter = startCharacter
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this.addHighlightItems(highlights, lnum, startCharacter, endCharacter, tokenType, tokenModifiers)
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}
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if (token.isCancellationRequested) return null
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return highlights
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}
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/**
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* Single line only.
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*/
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private addHighlightItems(highlights: SemanticTokenRange[], lnum: number, startCharacter: number, endCharacter: number, tokenType: string, tokenModifiers?: string[]): void {
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let { highlightGroups, combinedModifiers } = this.config
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tokenModifiers = tokenModifiers || []
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let highlightGroup: string
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let combine = false
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// Compose highlight group CocSem + modifier + type
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for (let item of tokenModifiers) {
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let hlGroup = HLGROUP_PREFIX + upperFirst(item) + upperFirst(tokenType)
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if (highlightGroups.includes(hlGroup)) {
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combine = combinedModifiers.includes(item)
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highlightGroup = hlGroup
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break
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}
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}
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if (!highlightGroup) {
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for (let item of tokenModifiers) {
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let hlGroup = HLGROUP_PREFIX + upperFirst(item)
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if (highlightGroups.includes(hlGroup)) {
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highlightGroup = hlGroup
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combine = combinedModifiers.includes(item)
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break
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}
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}
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}
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if (!highlightGroup) {
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let hlGroup = HLGROUP_PREFIX + upperFirst(tokenType)
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if (highlightGroups.includes(hlGroup)) {
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highlightGroup = hlGroup
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}
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}
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let line = this.doc.getline(lnum)
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let colStart = byteIndex(line, startCharacter)
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let colEnd = byteIndex(line, endCharacter)
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highlights.push({
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range: [lnum, colStart, colEnd],
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tokenType,
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combine,
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hlGroup: highlightGroup,
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tokenModifiers,
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})
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}
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private toHighlightItems(highlights: ReadonlyArray<SemanticTokenRange>, startLine?: number, endLine?: number): HighlightItem[] {
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let { incrementTypes } = this.config
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let filter = typeof startLine === 'number' && typeof endLine === 'number'
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let res: HighlightItem[] = []
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for (let hi of highlights) {
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if (!hi.hlGroup) continue
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let lnum = hi.range[0]
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if (filter && (lnum < startLine || lnum >= endLine)) continue
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let item: HighlightItem = {
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lnum,
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hlGroup: hi.hlGroup,
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colStart: hi.range[1],
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colEnd: hi.range[2],
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combine: hi.combine
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}
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if (incrementTypes.includes(hi.tokenType)) {
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item.end_incl = true
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item.start_incl = true
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}
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res.push(item)
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}
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return res
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}
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public async doHighlight(forceFull = false, onShown = false): Promise<void> {
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this.cancel()
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if (!this.enabled) return
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let tokenSource = this.tokenSource = new CancellationTokenSource()
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let token = tokenSource.token
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if (!onShown) {
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let hidden = await this.nvim.eval(`get(get(getbufinfo(${this.bufnr}),0,{}),'hidden',0)`)
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if (hidden == 1 || token.isCancellationRequested) return
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}
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if (this.shouldRangeHighlight) {
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let rangeTokenSource = this.rangeTokenSource = new CancellationTokenSource()
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await this.doRangeHighlight(rangeTokenSource.token)
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if (token.isCancellationRequested || this.rangeProviderOnly) return
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}
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const { doc } = this
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const version = doc.version
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let tokenRanges: SemanticTokenRange[] | undefined
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// TextDocument not changed, need perform highlight since lines possible replaced.
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if (version === this.previousResults?.version) {
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if (this._highlights && this._highlights[0] == version) {
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tokenRanges = this._highlights[1]
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} else {
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// possible cancelled.
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const tokens = this.previousResults.tokens
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const legend = languages.getLegend(doc.textDocument)
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tokenRanges = await this.getTokenRanges(tokens, legend, token)
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if (tokenRanges) this._highlights = [version, tokenRanges]
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}
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} else {
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tokenRanges = await this.requestAllHighlights(token, forceFull)
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if (tokenRanges) this._highlights = [version, tokenRanges]
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}
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// request cancelled or can't work
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if (!tokenRanges || token.isCancellationRequested) return
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if (!this._dirty || tokenRanges.length < 200) {
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let items = this.toHighlightItems(tokenRanges)
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let diff = await window.diffHighlights(this.bufnr, NAMESPACE, items, undefined, token)
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if (token.isCancellationRequested || !diff) return
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this._dirty = true
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this._version = version
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const priority = this.config.highlightPriority
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await window.applyDiffHighlights(this.bufnr, NAMESPACE, priority, diff)
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} else {
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this.regions.clear()
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await this.highlightRegions(token)
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}
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this._onDidRefresh.fire()
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}
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public async waitRefresh(): Promise<void> {
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return new Promise((resolve, reject) => {
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let timer = setTimeout(() => {
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disposable.dispose()
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reject(new Error(`Timeout after 500ms`))
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}, 500)
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let disposable = this.onDidRefresh(() => {
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disposable.dispose()
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clearTimeout(timer)
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resolve()
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})
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})
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}
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/**
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* Perform range highlight request and update.
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*/
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public async doRangeHighlight(token: CancellationToken): Promise<void> {
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if (!this.enabled) return
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let { version } = this.doc
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let res = await this.requestRangeHighlights(token)
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if (!res || token.isCancellationRequested) return
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const { highlights, start, end } = res
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if (this.rangeProviderOnly || !this.previousResults) {
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if (!this._highlights || version !== this._highlights[0]) {
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this._highlights = [version, []]
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}
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let tokenRanges = this._highlights[1]
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let used: Set<number> = tokenRanges.reduce((p, c) => p.add(c.range[0]), new Set<number>())
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highlights.forEach(hi => {
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if (!used.has(hi.range[0])) {
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tokenRanges.push(hi)
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}
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})
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}
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const items = this.toHighlightItems(highlights)
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const priority = this.config.highlightPriority
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let diff = await window.diffHighlights(this.bufnr, NAMESPACE, items, [start, end], token)
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if (diff) {
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await window.applyDiffHighlights(this.bufnr, NAMESPACE, priority, diff, true)
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this._dirty = true
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}
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}
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/**
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* highlight current visible regions
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*/
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public async highlightRegions(token: CancellationToken): Promise<void> {
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let { regions, highlights, config, lineCount, bufnr } = this
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if (!highlights) return
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let priority = config.highlightPriority
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let spans: [number, number][] = await this.nvim.call('coc#window#visible_ranges', [bufnr])
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if (token.isCancellationRequested || spans.length === 0) return
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let height = workspace.env.lines
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spans.forEach(o => {
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let s = o[0]
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o[0] = Math.max(0, Math.floor(s - height * 1.5))
|
||
|
|
o[1] = Math.min(lineCount, Math.ceil(o[1] + height * 1.5), s + height * 2)
|
||
|
|
})
|
||
|
|
for (let [start, end] of Regions.mergeSpans(spans)) {
|
||
|
|
if (regions.has(start, end)) continue
|
||
|
|
let items = this.toHighlightItems(highlights, start, end)
|
||
|
|
let diff = await window.diffHighlights(bufnr, NAMESPACE, items, [start, end], token)
|
||
|
|
if (token.isCancellationRequested) break
|
||
|
|
regions.add(start, end)
|
||
|
|
if (diff) void window.applyDiffHighlights(bufnr, NAMESPACE, priority, diff, true)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public async onCursorMoved(): Promise<void> {
|
||
|
|
this.cancel(true)
|
||
|
|
if (!this.enabled || this.doc.dirty) return
|
||
|
|
let rangeTokenSource = this.rangeTokenSource = new CancellationTokenSource()
|
||
|
|
let token = rangeTokenSource.token
|
||
|
|
await wait(global.__TEST__ ? 10 : 100)
|
||
|
|
if (token.isCancellationRequested) return
|
||
|
|
if (this.shouldRangeHighlight) {
|
||
|
|
await this.doRangeHighlight(token)
|
||
|
|
} else {
|
||
|
|
await this.highlightRegions(token)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Request highlights for visible range.
|
||
|
|
*/
|
||
|
|
private async requestRangeHighlights(token: CancellationToken): Promise<RangeHighlights | null> {
|
||
|
|
let { nvim, doc } = this
|
||
|
|
let region = await nvim.call('coc#window#visible_range', [this.bufnr]) as [number, number]
|
||
|
|
if (!region || token.isCancellationRequested) return null
|
||
|
|
const endLine = Math.min(region[0] + workspace.env.lines * 2, region[1])
|
||
|
|
let range = Range.create(region[0] - 1, 0, endLine, 0)
|
||
|
|
let res = await languages.provideDocumentRangeSemanticTokens(doc.textDocument, range, token)
|
||
|
|
if (!res || !SemanticTokens.is(res) || token.isCancellationRequested) return null
|
||
|
|
let legend = languages.getLegend(doc.textDocument, true)
|
||
|
|
let highlights = await this.getTokenRanges(res.data, legend, token)
|
||
|
|
if (token.isCancellationRequested) return null
|
||
|
|
return { highlights, start: region[0] - 1, end: region[1] }
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Request highlights from provider, return undefined when can't request or request cancelled
|
||
|
|
* Use range provider only when not semanticTokens provider exists.
|
||
|
|
*/
|
||
|
|
private async requestAllHighlights(token: CancellationToken, forceFull: boolean): Promise<SemanticTokenRange[] | null> {
|
||
|
|
const { doc } = this
|
||
|
|
const legend = languages.getLegend(doc.textDocument)
|
||
|
|
const hasEditProvider = languages.hasSemanticTokensEdits(doc.textDocument)
|
||
|
|
const previousResult = forceFull ? null : this.previousResults
|
||
|
|
const version = doc.version
|
||
|
|
let result: SemanticTokens | SemanticTokensDelta
|
||
|
|
if (hasEditProvider && previousResult?.resultId) {
|
||
|
|
result = await languages.provideDocumentSemanticTokensEdits(doc.textDocument, previousResult.resultId, token)
|
||
|
|
} else {
|
||
|
|
result = await languages.provideDocumentSemanticTokens(doc.textDocument, token)
|
||
|
|
}
|
||
|
|
if (token.isCancellationRequested || result == null) return
|
||
|
|
let tokens: uinteger[] = []
|
||
|
|
if (SemanticTokens.is(result)) {
|
||
|
|
tokens = result.data
|
||
|
|
} else if (previousResult && Array.isArray(result.edits)) {
|
||
|
|
tokens = previousResult.tokens
|
||
|
|
result.edits.forEach(e => {
|
||
|
|
tokens.splice(e.start, e.deleteCount ? e.deleteCount : 0, ...(e.data ?? []))
|
||
|
|
})
|
||
|
|
}
|
||
|
|
this.previousResults = { resultId: result.resultId, tokens, version }
|
||
|
|
return await this.getTokenRanges(tokens, legend, token)
|
||
|
|
}
|
||
|
|
|
||
|
|
public clearHighlight(): void {
|
||
|
|
this.buffer.clearNamespace(NAMESPACE)
|
||
|
|
}
|
||
|
|
|
||
|
|
public abandonResult(): void {
|
||
|
|
this.previousResults = undefined
|
||
|
|
}
|
||
|
|
|
||
|
|
public cancel(rangeOnly = false): void {
|
||
|
|
if (this.rangeTokenSource) {
|
||
|
|
this.rangeTokenSource.cancel()
|
||
|
|
this.rangeTokenSource.dispose()
|
||
|
|
this.rangeTokenSource = null
|
||
|
|
}
|
||
|
|
if (rangeOnly) return
|
||
|
|
this.regions.clear()
|
||
|
|
this.highlight.clear()
|
||
|
|
if (this.tokenSource) {
|
||
|
|
this.tokenSource.cancel()
|
||
|
|
this.tokenSource.dispose()
|
||
|
|
this.tokenSource = null
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public dispose(): void {
|
||
|
|
this.cancel()
|
||
|
|
this.previousResults = undefined
|
||
|
|
this._highlights = undefined
|
||
|
|
this._onDidRefresh.dispose()
|
||
|
|
this.regions.clear()
|
||
|
|
}
|
||
|
|
}
|