feat(textdocument): add length to LinesTextDocument

src/__tests__/modules/document.test.ts

@@ -38,6 +38,13 @@ describe('LinesTextDocument', () => {
     expect(res).toBe('use std::io::{Result, Error};')
   })
 
+  it('should get length', async () => {
+    let doc = createTextDocument(['foo'])
+    expect(doc.length).toBe(4)
+    expect(doc.getText().length).toBe(4)
+    expect(doc.length).toBe(4)
+  })
+
   it('should work when eol enabled', async () => {
     let doc = createTextDocument(['foo', 'bar'])
     expect(doc.lineCount).toBe(3)

src/model/textdocument.ts

@@ -101,6 +101,16 @@ export class LinesTextDocument implements TextDocument {
     return this._content
   }
 
+  public get length(): number {
+    if (!this._content) {
+      let n = this.lines.reduce((p, c) => {
+        return p + c.length + 1
+      }, 0)
+      return this.eol ? n : n - 1
+    }
+    return this._content.length
+  }
+
   public get end(): Position {
     let line = this.lineCount - 1
     if (this.eol) return Position.create(line, 0)

src/sources/keywords.ts

@@ -40,10 +40,9 @@ export default class KeywordsBuffer implements SyncItem {
     let { textDocument } = this.doc
     let { version, lineCount } = textDocument
     if (this.version === version) return
-    let text = textDocument.getText()
     if (events.insertMode
       && this.lineCount == lineCount
-      && text.length > MAX_LENGTH) return
+      && textDocument.length > MAX_LENGTH) return
     this.cancel()
     let tokenSource = this.tokenSource = new CancellationTokenSource()
     void this.doc.matchWords(tokenSource.token).then(res => {

typings/index.d.ts

@@ -1862,6 +1862,14 @@ declare module 'coc.nvim' {
   }
 
   export interface LinesTextDocument extends TextDocument {
+    /**
+     * Total length of TextDocument.
+     */
+    readonly length: number
+    /**
+     * End position of TextDocument.
+     */
+    readonly end: Position
     /**
      * Returns a text line denoted by the line number. Note
      * that the returned object is *not* live and changes to the