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lineNumbers.ts
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lineNumbers.ts
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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import 'vs/css!./lineNumbers';
import * as platform from 'vs/base/common/platform';
import { DynamicViewOverlay } from 'vs/editor/browser/view/dynamicViewOverlay';
import { RenderLineNumbersType, EditorOption } from 'vs/editor/common/config/editorOptions';
import { Position } from 'vs/editor/common/core/position';
import { Range } from 'vs/editor/common/core/range';
import { RenderingContext } from 'vs/editor/browser/view/renderingContext';
import { ViewContext } from 'vs/editor/common/viewModel/viewContext';
import * as viewEvents from 'vs/editor/common/viewEvents';
import { registerThemingParticipant } from 'vs/platform/theme/common/themeService';
import { editorDimmedLineNumber, editorLineNumbers } from 'vs/editor/common/core/editorColorRegistry';
export class LineNumbersOverlay extends DynamicViewOverlay {
public static readonly CLASS_NAME = 'line-numbers';
private readonly _context: ViewContext;
private _lineHeight!: number;
private _renderLineNumbers!: RenderLineNumbersType;
private _renderCustomLineNumbers!: ((lineNumber: number) => string) | null;
private _renderFinalNewline!: 'off' | 'on' | 'dimmed';
private _lineNumbersLeft!: number;
private _lineNumbersWidth!: number;
private _lastCursorModelPosition: Position;
private _renderResult: string[] | null;
private _activeLineNumber: number;
constructor(context: ViewContext) {
super();
this._context = context;
this._readConfig();
this._lastCursorModelPosition = new Position(1, 1);
this._renderResult = null;
this._activeLineNumber = 1;
this._context.addEventHandler(this);
}
private _readConfig(): void {
const options = this._context.configuration.options;
this._lineHeight = options.get(EditorOption.lineHeight);
const lineNumbers = options.get(EditorOption.lineNumbers);
this._renderLineNumbers = lineNumbers.renderType;
this._renderCustomLineNumbers = lineNumbers.renderFn;
this._renderFinalNewline = options.get(EditorOption.renderFinalNewline);
const layoutInfo = options.get(EditorOption.layoutInfo);
this._lineNumbersLeft = layoutInfo.lineNumbersLeft;
this._lineNumbersWidth = layoutInfo.lineNumbersWidth;
}
public override dispose(): void {
this._context.removeEventHandler(this);
this._renderResult = null;
super.dispose();
}
// --- begin event handlers
public override onConfigurationChanged(e: viewEvents.ViewConfigurationChangedEvent): boolean {
this._readConfig();
return true;
}
public override onCursorStateChanged(e: viewEvents.ViewCursorStateChangedEvent): boolean {
const primaryViewPosition = e.selections[0].getPosition();
this._lastCursorModelPosition = this._context.viewModel.coordinatesConverter.convertViewPositionToModelPosition(primaryViewPosition);
let shouldRender = false;
if (this._activeLineNumber !== primaryViewPosition.lineNumber) {
this._activeLineNumber = primaryViewPosition.lineNumber;
shouldRender = true;
}
if (this._renderLineNumbers === RenderLineNumbersType.Relative || this._renderLineNumbers === RenderLineNumbersType.Interval) {
shouldRender = true;
}
return shouldRender;
}
public override onFlushed(e: viewEvents.ViewFlushedEvent): boolean {
return true;
}
public override onLinesChanged(e: viewEvents.ViewLinesChangedEvent): boolean {
return true;
}
public override onLinesDeleted(e: viewEvents.ViewLinesDeletedEvent): boolean {
return true;
}
public override onLinesInserted(e: viewEvents.ViewLinesInsertedEvent): boolean {
return true;
}
public override onScrollChanged(e: viewEvents.ViewScrollChangedEvent): boolean {
return e.scrollTopChanged;
}
public override onZonesChanged(e: viewEvents.ViewZonesChangedEvent): boolean {
return true;
}
public override onDecorationsChanged(e: viewEvents.ViewDecorationsChangedEvent): boolean {
return e.affectsLineNumber;
}
// --- end event handlers
private _getLineRenderLineNumber(viewLineNumber: number): string {
const modelPosition = this._context.viewModel.coordinatesConverter.convertViewPositionToModelPosition(new Position(viewLineNumber, 1));
if (modelPosition.column !== 1) {
return '';
}
const modelLineNumber = modelPosition.lineNumber;
if (this._renderCustomLineNumbers) {
return this._renderCustomLineNumbers(modelLineNumber);
}
if (this._renderLineNumbers === RenderLineNumbersType.Relative) {
const diff = Math.abs(this._lastCursorModelPosition.lineNumber - modelLineNumber);
if (diff === 0) {
return '<span class="relative-current-line-number">' + modelLineNumber + '</span>';
}
return String(diff);
}
if (this._renderLineNumbers === RenderLineNumbersType.Interval) {
if (this._lastCursorModelPosition.lineNumber === modelLineNumber) {
return String(modelLineNumber);
}
if (modelLineNumber % 10 === 0) {
return String(modelLineNumber);
}
const finalLineNumber = this._context.viewModel.getLineCount();
if (modelLineNumber === finalLineNumber) {
return String(modelLineNumber);
}
return '';
}
return String(modelLineNumber);
}
public prepareRender(ctx: RenderingContext): void {
if (this._renderLineNumbers === RenderLineNumbersType.Off) {
this._renderResult = null;
return;
}
const lineHeightClassName = (platform.isLinux ? (this._lineHeight % 2 === 0 ? ' lh-even' : ' lh-odd') : '');
const visibleStartLineNumber = ctx.visibleRange.startLineNumber;
const visibleEndLineNumber = ctx.visibleRange.endLineNumber;
const lineNoDecorations = this._context.viewModel.getDecorationsInViewport(ctx.visibleRange).filter(d => !!d.options.lineNumberClassName);
lineNoDecorations.sort((a, b) => Range.compareRangesUsingEnds(a.range, b.range));
let decorationStartIndex = 0;
const lineCount = this._context.viewModel.getLineCount();
const output: string[] = [];
for (let lineNumber = visibleStartLineNumber; lineNumber <= visibleEndLineNumber; lineNumber++) {
const lineIndex = lineNumber - visibleStartLineNumber;
let renderLineNumber = this._getLineRenderLineNumber(lineNumber);
let extraClassNames = '';
// skip decorations whose end positions we've already passed
while (decorationStartIndex < lineNoDecorations.length && lineNoDecorations[decorationStartIndex].range.endLineNumber < lineNumber) {
decorationStartIndex++;
}
for (let i = decorationStartIndex; i < lineNoDecorations.length; i++) {
const { range, options } = lineNoDecorations[i];
if (range.startLineNumber <= lineNumber) {
extraClassNames += ' ' + options.lineNumberClassName;
}
}
if (!renderLineNumber && !extraClassNames) {
output[lineIndex] = '';
continue;
}
if (lineNumber === lineCount && this._context.viewModel.getLineLength(lineNumber) === 0) {
// this is the last line
if (this._renderFinalNewline === 'off') {
renderLineNumber = '';
}
if (this._renderFinalNewline === 'dimmed') {
extraClassNames += ' dimmed-line-number';
}
}
if (lineNumber === this._activeLineNumber) {
extraClassNames += ' active-line-number';
}
output[lineIndex] = (
`<div class="${LineNumbersOverlay.CLASS_NAME}${lineHeightClassName}${extraClassNames}" style="left:${this._lineNumbersLeft}px;width:${this._lineNumbersWidth}px;">${renderLineNumber}</div>`
);
}
this._renderResult = output;
}
public render(startLineNumber: number, lineNumber: number): string {
if (!this._renderResult) {
return '';
}
const lineIndex = lineNumber - startLineNumber;
if (lineIndex < 0 || lineIndex >= this._renderResult.length) {
return '';
}
return this._renderResult[lineIndex];
}
}
registerThemingParticipant((theme, collector) => {
const editorLineNumbersColor = theme.getColor(editorLineNumbers);
const editorDimmedLineNumberColor = theme.getColor(editorDimmedLineNumber);
if (editorDimmedLineNumberColor) {
collector.addRule(`.monaco-editor .line-numbers.dimmed-line-number { color: ${editorDimmedLineNumberColor}; }`);
} else if (editorLineNumbersColor) {
collector.addRule(`.monaco-editor .line-numbers.dimmed-line-number { color: ${editorLineNumbersColor.transparent(0.4)}; }`);
}
});