xterm

[VSoRC/.git] / node_modules / xterm / src / browser / renderer / LinkRenderLayer.ts

diff --git a/node_modules/xterm/src/browser/renderer/LinkRenderLayer.ts b/node_modules/xterm/src/browser/renderer/LinkRenderLayer.ts
new file mode 100644 (file)
index 0000000..a7be54e
--- /dev/null
+++ b/node_modules/xterm/src/browser/renderer/LinkRenderLayer.ts
@@ -0,0 +1,79 @@
+/**
+ * Copyright (c) 2017 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { IRenderDimensions } from 'browser/renderer/Types';
+import { BaseRenderLayer } from './BaseRenderLayer';
+import { INVERTED_DEFAULT_COLOR } from 'browser/renderer/atlas/Constants';
+import { is256Color } from 'browser/renderer/atlas/CharAtlasUtils';
+import { IColorSet, ILinkifierEvent, ILinkifier } from 'browser/Types';
+import { IBufferService, IOptionsService } from 'common/services/Services';
+
+export class LinkRenderLayer extends BaseRenderLayer {
+  private _state: ILinkifierEvent | undefined;
+
+  constructor(
+    container: HTMLElement,
+    zIndex: number,
+    colors: IColorSet,
+    rendererId: number,
+    linkifier: ILinkifier,
+    readonly bufferService: IBufferService,
+    readonly optionsService: IOptionsService
+  ) {
+    super(container, 'link', zIndex, true, colors, rendererId, bufferService, optionsService);
+    linkifier.onLinkHover(e => this._onLinkHover(e));
+    linkifier.onLinkLeave(e => this._onLinkLeave(e));
+  }
+
+  public resize(dim: IRenderDimensions): void {
+    super.resize(dim);
+    // Resizing the canvas discards the contents of the canvas so clear state
+    this._state = undefined;
+  }
+
+  public reset(): void {
+    this._clearCurrentLink();
+  }
+
+  private _clearCurrentLink(): void {
+    if (this._state) {
+      this._clearCells(this._state.x1, this._state.y1, this._state.cols - this._state.x1, 1);
+      const middleRowCount = this._state.y2 - this._state.y1 - 1;
+      if (middleRowCount > 0) {
+        this._clearCells(0, this._state.y1 + 1, this._state.cols, middleRowCount);
+      }
+      this._clearCells(0, this._state.y2, this._state.x2, 1);
+      this._state = undefined;
+    }
+  }
+
+  private _onLinkHover(e: ILinkifierEvent): void {
+    if (e.fg === INVERTED_DEFAULT_COLOR) {
+      this._ctx.fillStyle = this._colors.background.css;
+    } else if (e.fg && is256Color(e.fg)) {
+      // 256 color support
+      this._ctx.fillStyle = this._colors.ansi[e.fg].css;
+    } else {
+      this._ctx.fillStyle = this._colors.foreground.css;
+    }
+
+    if (e.y1 === e.y2) {
+      // Single line link
+      this._fillBottomLineAtCells(e.x1, e.y1, e.x2 - e.x1);
+    } else {
+      // Multi-line link
+      this._fillBottomLineAtCells(e.x1, e.y1, e.cols - e.x1);
+      for (let y = e.y1 + 1; y < e.y2; y++) {
+        this._fillBottomLineAtCells(0, y, e.cols);
+      }
+      this._fillBottomLineAtCells(0, e.y2, e.x2);
+    }
+    this._state = e;
+  }
+
+  private _onLinkLeave(e: ILinkifierEvent): void {
+    this._clearCurrentLink();
+  }
+}