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glyphMargin.ts
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glyphMargin.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 { FastDomNode, createFastDomNode } from 'vs/base/browser/fastDomNode';
import { ArrayQueue } from 'vs/base/common/arrays';
import 'vs/css!./glyphMargin';
import { IGlyphMarginWidget, IGlyphMarginWidgetPosition } from 'vs/editor/browser/editorBrowser';
import { DynamicViewOverlay } from 'vs/editor/browser/view/dynamicViewOverlay';
import { RenderingContext, RestrictedRenderingContext } from 'vs/editor/browser/view/renderingContext';
import { ViewPart } from 'vs/editor/browser/view/viewPart';
import { EditorOption } from 'vs/editor/common/config/editorOptions';
import { Position } from 'vs/editor/common/core/position';
import { Range } from 'vs/editor/common/core/range';
import { GlyphMarginLane } from 'vs/editor/common/model';
import * as viewEvents from 'vs/editor/common/viewEvents';
import { ViewContext } from 'vs/editor/common/viewModel/viewContext';
/**
* Represents a decoration that should be shown along the lines from `startLineNumber` to `endLineNumber`.
* This can end up producing multiple `LineDecorationToRender`.
*/
export class DecorationToRender {
public readonly _decorationToRenderBrand: void = undefined;
public readonly zIndex: number;
constructor(
public readonly startLineNumber: number,
public readonly endLineNumber: number,
public readonly className: string,
public readonly tooltip: string | null,
zIndex: number | undefined,
) {
this.zIndex = zIndex ?? 0;
}
}
/**
* A decoration that should be shown along a line.
*/
export class LineDecorationToRender {
constructor(
public readonly className: string,
public readonly zIndex: number,
public readonly tooltip: string | null,
) { }
}
/**
* Decorations to render on a visible line.
*/
export class VisibleLineDecorationsToRender {
private readonly decorations: LineDecorationToRender[] = [];
public add(decoration: LineDecorationToRender) {
this.decorations.push(decoration);
}
public getDecorations(): LineDecorationToRender[] {
return this.decorations;
}
}
export abstract class DedupOverlay extends DynamicViewOverlay {
/**
* Returns an array with an element for each visible line number.
*/
protected _render(visibleStartLineNumber: number, visibleEndLineNumber: number, decorations: DecorationToRender[]): VisibleLineDecorationsToRender[] {
const output: VisibleLineDecorationsToRender[] = [];
for (let lineNumber = visibleStartLineNumber; lineNumber <= visibleEndLineNumber; lineNumber++) {
const lineIndex = lineNumber - visibleStartLineNumber;
output[lineIndex] = new VisibleLineDecorationsToRender();
}
if (decorations.length === 0) {
return output;
}
// Sort decorations by className, then by startLineNumber and then by endLineNumber
decorations.sort((a, b) => {
if (a.className === b.className) {
if (a.startLineNumber === b.startLineNumber) {
return a.endLineNumber - b.endLineNumber;
}
return a.startLineNumber - b.startLineNumber;
}
return (a.className < b.className ? -1 : 1);
});
let prevClassName: string | null = null;
let prevEndLineIndex = 0;
for (let i = 0, len = decorations.length; i < len; i++) {
const d = decorations[i];
const className = d.className;
const zIndex = d.zIndex;
let startLineIndex = Math.max(d.startLineNumber, visibleStartLineNumber) - visibleStartLineNumber;
const endLineIndex = Math.min(d.endLineNumber, visibleEndLineNumber) - visibleStartLineNumber;
if (prevClassName === className) {
// Here we avoid rendering the same className multiple times on the same line
startLineIndex = Math.max(prevEndLineIndex + 1, startLineIndex);
prevEndLineIndex = Math.max(prevEndLineIndex, endLineIndex);
} else {
prevClassName = className;
prevEndLineIndex = endLineIndex;
}
for (let i = startLineIndex; i <= prevEndLineIndex; i++) {
output[i].add(new LineDecorationToRender(className, zIndex, d.tooltip));
}
}
return output;
}
}
export class GlyphMarginWidgets extends ViewPart {
public domNode: FastDomNode<HTMLElement>;
private _lineHeight: number;
private _glyphMargin: boolean;
private _glyphMarginLeft: number;
private _glyphMarginWidth: number;
private _glyphMarginDecorationLaneCount: number;
private _managedDomNodes: FastDomNode<HTMLElement>[];
private _decorationGlyphsToRender: DecorationBasedGlyph[];
private _widgets: { [key: string]: IWidgetData } = {};
constructor(context: ViewContext) {
super(context);
this._context = context;
const options = this._context.configuration.options;
const layoutInfo = options.get(EditorOption.layoutInfo);
this.domNode = createFastDomNode(document.createElement('div'));
this.domNode.setClassName('glyph-margin-widgets');
this.domNode.setPosition('absolute');
this.domNode.setTop(0);
this._lineHeight = options.get(EditorOption.lineHeight);
this._glyphMargin = options.get(EditorOption.glyphMargin);
this._glyphMarginLeft = layoutInfo.glyphMarginLeft;
this._glyphMarginWidth = layoutInfo.glyphMarginWidth;
this._glyphMarginDecorationLaneCount = layoutInfo.glyphMarginDecorationLaneCount;
this._managedDomNodes = [];
this._decorationGlyphsToRender = [];
}
public override dispose(): void {
this._managedDomNodes = [];
this._decorationGlyphsToRender = [];
this._widgets = {};
super.dispose();
}
public getWidgets(): IWidgetData[] {
return Object.values(this._widgets);
}
// --- begin event handlers
public override onConfigurationChanged(e: viewEvents.ViewConfigurationChangedEvent): boolean {
const options = this._context.configuration.options;
const layoutInfo = options.get(EditorOption.layoutInfo);
this._lineHeight = options.get(EditorOption.lineHeight);
this._glyphMargin = options.get(EditorOption.glyphMargin);
this._glyphMarginLeft = layoutInfo.glyphMarginLeft;
this._glyphMarginWidth = layoutInfo.glyphMarginWidth;
this._glyphMarginDecorationLaneCount = layoutInfo.glyphMarginDecorationLaneCount;
return true;
}
public override onDecorationsChanged(e: viewEvents.ViewDecorationsChangedEvent): boolean {
return true;
}
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;
}
// --- end event handlers
// --- begin widget management
public addWidget(widget: IGlyphMarginWidget): void {
const domNode = createFastDomNode(widget.getDomNode());
this._widgets[widget.getId()] = {
widget: widget,
preference: widget.getPosition(),
domNode: domNode,
renderInfo: null
};
domNode.setPosition('absolute');
domNode.setDisplay('none');
domNode.setAttribute('widgetId', widget.getId());
this.domNode.appendChild(domNode);
this.setShouldRender();
}
public setWidgetPosition(widget: IGlyphMarginWidget, preference: IGlyphMarginWidgetPosition): boolean {
const myWidget = this._widgets[widget.getId()];
if (myWidget.preference.lane === preference.lane
&& myWidget.preference.zIndex === preference.zIndex
&& Range.equalsRange(myWidget.preference.range, preference.range)) {
return false;
}
myWidget.preference = preference;
this.setShouldRender();
return true;
}
public removeWidget(widget: IGlyphMarginWidget): void {
const widgetId = widget.getId();
if (this._widgets[widgetId]) {
const widgetData = this._widgets[widgetId];
const domNode = widgetData.domNode.domNode;
delete this._widgets[widgetId];
domNode.remove();
this.setShouldRender();
}
}
// --- end widget management
private _collectDecorationBasedGlyphRenderRequest(ctx: RenderingContext, requests: GlyphRenderRequest[]): void {
const visibleStartLineNumber = ctx.visibleRange.startLineNumber;
const visibleEndLineNumber = ctx.visibleRange.endLineNumber;
const decorations = ctx.getDecorationsInViewport();
for (const d of decorations) {
const glyphMarginClassName = d.options.glyphMarginClassName;
if (!glyphMarginClassName) {
continue;
}
const startLineNumber = Math.max(d.range.startLineNumber, visibleStartLineNumber);
const endLineNumber = Math.min(d.range.endLineNumber, visibleEndLineNumber);
const lane = d.options.glyphMargin?.position ?? GlyphMarginLane.Center;
const zIndex = d.options.zIndex ?? 0;
for (let lineNumber = startLineNumber; lineNumber <= endLineNumber; lineNumber++) {
const modelPosition = this._context.viewModel.coordinatesConverter.convertViewPositionToModelPosition(new Position(lineNumber, 0));
const laneIndex = this._context.viewModel.glyphLanes.getLanesAtLine(modelPosition.lineNumber).indexOf(lane);
requests.push(new DecorationBasedGlyphRenderRequest(lineNumber, laneIndex, zIndex, glyphMarginClassName));
}
}
}
private _collectWidgetBasedGlyphRenderRequest(ctx: RenderingContext, requests: GlyphRenderRequest[]): void {
const visibleStartLineNumber = ctx.visibleRange.startLineNumber;
const visibleEndLineNumber = ctx.visibleRange.endLineNumber;
for (const widget of Object.values(this._widgets)) {
const range = widget.preference.range;
const { startLineNumber, endLineNumber } = this._context.viewModel.coordinatesConverter.convertModelRangeToViewRange(Range.lift(range));
if (!startLineNumber || !endLineNumber || endLineNumber < visibleStartLineNumber || startLineNumber > visibleEndLineNumber) {
// The widget is not in the viewport
continue;
}
// The widget is in the viewport, find a good line for it
const widgetLineNumber = Math.max(startLineNumber, visibleStartLineNumber);
const modelPosition = this._context.viewModel.coordinatesConverter.convertViewPositionToModelPosition(new Position(widgetLineNumber, 0));
const laneIndex = this._context.viewModel.glyphLanes.getLanesAtLine(modelPosition.lineNumber).indexOf(widget.preference.lane);
requests.push(new WidgetBasedGlyphRenderRequest(widgetLineNumber, laneIndex, widget.preference.zIndex, widget));
}
}
private _collectSortedGlyphRenderRequests(ctx: RenderingContext): GlyphRenderRequest[] {
const requests: GlyphRenderRequest[] = [];
this._collectDecorationBasedGlyphRenderRequest(ctx, requests);
this._collectWidgetBasedGlyphRenderRequest(ctx, requests);
// sort requests by lineNumber ASC, lane ASC, zIndex DESC, type DESC (widgets first), className ASC
// don't change this sort unless you understand `prepareRender` below.
requests.sort((a, b) => {
if (a.lineNumber === b.lineNumber) {
if (a.laneIndex === b.laneIndex) {
if (a.zIndex === b.zIndex) {
if (b.type === a.type) {
if (a.type === GlyphRenderRequestType.Decoration && b.type === GlyphRenderRequestType.Decoration) {
return (a.className < b.className ? -1 : 1);
}
return 0;
}
return b.type - a.type;
}
return b.zIndex - a.zIndex;
}
return a.laneIndex - b.laneIndex;
}
return a.lineNumber - b.lineNumber;
});
return requests;
}
/**
* Will store render information in each widget's renderInfo and in `_decorationGlyphsToRender`.
*/
public prepareRender(ctx: RenderingContext): void {
if (!this._glyphMargin) {
this._decorationGlyphsToRender = [];
return;
}
for (const widget of Object.values(this._widgets)) {
widget.renderInfo = null;
}
const requests = new ArrayQueue<GlyphRenderRequest>(this._collectSortedGlyphRenderRequests(ctx));
const decorationGlyphsToRender: DecorationBasedGlyph[] = [];
while (requests.length > 0) {
const first = requests.peek();
if (!first) {
// not possible
break;
}
// Requests are sorted by lineNumber and lane, so we read all requests for this particular location
const requestsAtLocation = requests.takeWhile((el) => el.lineNumber === first.lineNumber && el.laneIndex === first.laneIndex);
if (!requestsAtLocation || requestsAtLocation.length === 0) {
// not possible
break;
}
const winner = requestsAtLocation[0];
if (winner.type === GlyphRenderRequestType.Decoration) {
// combine all decorations with the same z-index
const classNames: string[] = [];
// requests are sorted by zIndex, type, and className so we can dedup className by looking at the previous one
for (const request of requestsAtLocation) {
if (request.zIndex !== winner.zIndex || request.type !== winner.type) {
break;
}
if (classNames.length === 0 || classNames[classNames.length - 1] !== request.className) {
classNames.push(request.className);
}
}
decorationGlyphsToRender.push(winner.accept(classNames.join(' '))); // TODO@joyceerhl Implement overflow for remaining decorations
} else {
// widgets cannot be combined
winner.widget.renderInfo = {
lineNumber: winner.lineNumber,
laneIndex: winner.laneIndex,
};
}
}
this._decorationGlyphsToRender = decorationGlyphsToRender;
}
public render(ctx: RestrictedRenderingContext): void {
if (!this._glyphMargin) {
for (const widget of Object.values(this._widgets)) {
widget.domNode.setDisplay('none');
}
while (this._managedDomNodes.length > 0) {
const domNode = this._managedDomNodes.pop();
domNode?.domNode.remove();
}
return;
}
const width = (Math.round(this._glyphMarginWidth / this._glyphMarginDecorationLaneCount));
// Render widgets
for (const widget of Object.values(this._widgets)) {
if (!widget.renderInfo) {
// this widget is not visible
widget.domNode.setDisplay('none');
} else {
const top = ctx.viewportData.relativeVerticalOffset[widget.renderInfo.lineNumber - ctx.viewportData.startLineNumber];
const left = this._glyphMarginLeft + widget.renderInfo.laneIndex * this._lineHeight;
widget.domNode.setDisplay('block');
widget.domNode.setTop(top);
widget.domNode.setLeft(left);
widget.domNode.setWidth(width);
widget.domNode.setHeight(this._lineHeight);
}
}
// Render decorations, reusing previous dom nodes as possible
for (let i = 0; i < this._decorationGlyphsToRender.length; i++) {
const dec = this._decorationGlyphsToRender[i];
const top = ctx.viewportData.relativeVerticalOffset[dec.lineNumber - ctx.viewportData.startLineNumber];
const left = this._glyphMarginLeft + dec.laneIndex * this._lineHeight;
let domNode: FastDomNode<HTMLElement>;
if (i < this._managedDomNodes.length) {
domNode = this._managedDomNodes[i];
} else {
domNode = createFastDomNode(document.createElement('div'));
this._managedDomNodes.push(domNode);
this.domNode.appendChild(domNode);
}
domNode.setClassName(`cgmr codicon ` + dec.combinedClassName);
domNode.setPosition(`absolute`);
domNode.setTop(top);
domNode.setLeft(left);
domNode.setWidth(width);
domNode.setHeight(this._lineHeight);
}
// remove extra dom nodes
while (this._managedDomNodes.length > this._decorationGlyphsToRender.length) {
const domNode = this._managedDomNodes.pop();
domNode?.domNode.remove();
}
}
}
export interface IWidgetData {
widget: IGlyphMarginWidget;
preference: IGlyphMarginWidgetPosition;
domNode: FastDomNode<HTMLElement>;
/**
* it will contain the location where to render the widget
* or null if the widget is not visible
*/
renderInfo: IRenderInfo | null;
}
export interface IRenderInfo {
lineNumber: number;
laneIndex: number;
}
const enum GlyphRenderRequestType {
Decoration = 0,
Widget = 1
}
/**
* A request to render a decoration in the glyph margin at a certain location.
*/
class DecorationBasedGlyphRenderRequest {
public readonly type = GlyphRenderRequestType.Decoration;
constructor(
public readonly lineNumber: number,
public readonly laneIndex: number,
public readonly zIndex: number,
public readonly className: string,
) { }
accept(combinedClassName: string): DecorationBasedGlyph {
return new DecorationBasedGlyph(this.lineNumber, this.laneIndex, combinedClassName);
}
}
/**
* A request to render a widget in the glyph margin at a certain location.
*/
class WidgetBasedGlyphRenderRequest {
public readonly type = GlyphRenderRequestType.Widget;
constructor(
public readonly lineNumber: number,
public readonly laneIndex: number,
public readonly zIndex: number,
public readonly widget: IWidgetData,
) { }
}
type GlyphRenderRequest = DecorationBasedGlyphRenderRequest | WidgetBasedGlyphRenderRequest;
class DecorationBasedGlyph {
constructor(
public readonly lineNumber: number,
public readonly laneIndex: number,
public readonly combinedClassName: string
) { }
}