70 lines
2.3 KiB
TypeScript
70 lines
2.3 KiB
TypeScript
/**
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* Copyright (c) 2017 The xterm.js authors. All rights reserved.
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* @license MIT
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*/
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import { ILinkHoverEvent, ITerminal, ILinkifierAccessor, LinkHoverEventTypes } from '../Types';
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import { IColorSet, IRenderDimensions } from './Types';
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import { BaseRenderLayer } from './BaseRenderLayer';
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import { INVERTED_DEFAULT_COLOR } from './atlas/Types';
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export class LinkRenderLayer extends BaseRenderLayer {
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private _state: ILinkHoverEvent = null;
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constructor(container: HTMLElement, zIndex: number, colors: IColorSet, terminal: ILinkifierAccessor) {
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super(container, 'link', zIndex, true, colors);
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terminal.linkifier.on(LinkHoverEventTypes.HOVER, (e: ILinkHoverEvent) => this._onLinkHover(e));
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terminal.linkifier.on(LinkHoverEventTypes.LEAVE, (e: ILinkHoverEvent) => this._onLinkLeave(e));
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}
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public resize(terminal: ITerminal, dim: IRenderDimensions): void {
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super.resize(terminal, dim);
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// Resizing the canvas discards the contents of the canvas so clear state
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this._state = null;
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}
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public reset(terminal: ITerminal): void {
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this._clearCurrentLink();
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}
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private _clearCurrentLink(): void {
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if (this._state) {
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this.clearCells(this._state.x1, this._state.y1, this._state.cols - this._state.x1, 1);
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const middleRowCount = this._state.y2 - this._state.y1 - 1;
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if (middleRowCount > 0) {
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this.clearCells(0, this._state.y1 + 1, this._state.cols, middleRowCount);
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}
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this.clearCells(0, this._state.y2, this._state.x2, 1);
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this._state = null;
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}
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}
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private _onLinkHover(e: ILinkHoverEvent): void {
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if (e.fg === INVERTED_DEFAULT_COLOR) {
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this._ctx.fillStyle = this._colors.background.css;
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} else if (e.fg < 256) {
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// 256 color support
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this._ctx.fillStyle = this._colors.ansi[e.fg].css;
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} else {
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this._ctx.fillStyle = this._colors.foreground.css;
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}
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if (e.y1 === e.y2) {
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// Single line link
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this.fillBottomLineAtCells(e.x1, e.y1, e.x2 - e.x1);
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} else {
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// Multi-line link
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this.fillBottomLineAtCells(e.x1, e.y1, e.cols - e.x1);
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for (let y = e.y1 + 1; y < e.y2; y++) {
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this.fillBottomLineAtCells(0, y, e.cols);
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}
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this.fillBottomLineAtCells(0, e.y2, e.x2);
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}
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this._state = e;
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}
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private _onLinkLeave(e: ILinkHoverEvent): void {
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this._clearCurrentLink();
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}
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}
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