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| 1 | +import * as anser from "anser"; |
| 2 | +import * as vscode from "vscode"; |
| 3 | +import { ProviderResult, Range, TextEditorDecorationType, ThemeColor, window } from "vscode"; |
| 4 | +import { Ctx } from "./ctx"; |
| 5 | + |
| 6 | +export const URI_SCHEME = "rust-analyzer-diagnostics-view"; |
| 7 | + |
| 8 | +export class TextDocumentProvider implements vscode.TextDocumentContentProvider { |
| 9 | + private _onDidChange = new vscode.EventEmitter<vscode.Uri>(); |
| 10 | + |
| 11 | + public constructor(private readonly ctx: Ctx) {} |
| 12 | + |
| 13 | + get onDidChange(): vscode.Event<vscode.Uri> { |
| 14 | + return this._onDidChange.event; |
| 15 | + } |
| 16 | + |
| 17 | + triggerUpdate(uri: vscode.Uri) { |
| 18 | + if (uri.scheme === URI_SCHEME) { |
| 19 | + this._onDidChange.fire(uri); |
| 20 | + } |
| 21 | + } |
| 22 | + |
| 23 | + dispose() { |
| 24 | + this._onDidChange.dispose(); |
| 25 | + } |
| 26 | + |
| 27 | + async provideTextDocumentContent(uri: vscode.Uri): Promise<string> { |
| 28 | + const contents = getRenderedDiagnostic(this.ctx, uri); |
| 29 | + return anser.ansiToText(contents); |
| 30 | + } |
| 31 | +} |
| 32 | + |
| 33 | +function getRenderedDiagnostic(ctx: Ctx, uri: vscode.Uri): string { |
| 34 | + const diags = ctx.client?.diagnostics?.get(vscode.Uri.parse(uri.fragment, true)); |
| 35 | + if (!diags) { |
| 36 | + return "Unable to find original rustc diagnostic"; |
| 37 | + } |
| 38 | + |
| 39 | + const diag = diags[parseInt(uri.query)]; |
| 40 | + if (!diag) { |
| 41 | + return "Unable to find original rustc diagnostic"; |
| 42 | + } |
| 43 | + const rendered = (diag as unknown as { data?: { rendered?: string } }).data?.rendered; |
| 44 | + |
| 45 | + if (!rendered) { |
| 46 | + return "Unable to find original rustc diagnostic"; |
| 47 | + } |
| 48 | + |
| 49 | + return rendered; |
| 50 | +} |
| 51 | + |
| 52 | +interface AnserStyle { |
| 53 | + fg: string; |
| 54 | + bg: string; |
| 55 | + fg_truecolor: string; |
| 56 | + bg_truecolor: string; |
| 57 | + decorations: Array<anser.DecorationName>; |
| 58 | +} |
| 59 | + |
| 60 | +export class AnsiDecorationProvider implements vscode.Disposable { |
| 61 | + private _decorationTypes = new Map<AnserStyle, TextEditorDecorationType>(); |
| 62 | + |
| 63 | + public constructor(private readonly ctx: Ctx) {} |
| 64 | + |
| 65 | + dispose(): void { |
| 66 | + for (const decorationType of this._decorationTypes.values()) { |
| 67 | + decorationType.dispose(); |
| 68 | + } |
| 69 | + |
| 70 | + this._decorationTypes.clear(); |
| 71 | + } |
| 72 | + |
| 73 | + async provideDecorations(editor: vscode.TextEditor) { |
| 74 | + if (editor.document.uri.scheme !== URI_SCHEME) { |
| 75 | + return; |
| 76 | + } |
| 77 | + |
| 78 | + const decorations = (await this._getDecorations(editor.document.uri)) || []; |
| 79 | + for (const [decorationType, ranges] of decorations) { |
| 80 | + editor.setDecorations(decorationType, ranges); |
| 81 | + } |
| 82 | + } |
| 83 | + |
| 84 | + private _getDecorations( |
| 85 | + uri: vscode.Uri |
| 86 | + ): ProviderResult<[TextEditorDecorationType, Range[]][]> { |
| 87 | + const stringContents = getRenderedDiagnostic(this.ctx, uri); |
| 88 | + const lines = stringContents.split("\n"); |
| 89 | + |
| 90 | + const result = new Map<TextEditorDecorationType, Range[]>(); |
| 91 | + // Populate all known decoration types in the result. This forces any |
| 92 | + // lingering decorations to be cleared if the text content changes to |
| 93 | + // something without ANSI codes for a given decoration type. |
| 94 | + for (const decorationType of this._decorationTypes.values()) { |
| 95 | + result.set(decorationType, []); |
| 96 | + } |
| 97 | + |
| 98 | + for (const [lineNumber, line] of lines.entries()) { |
| 99 | + const totalEscapeLength = 0; |
| 100 | + |
| 101 | + // eslint-disable-next-line camelcase |
| 102 | + const parsed = anser.ansiToJson(line, { use_classes: true }); |
| 103 | + |
| 104 | + let offset = 0; |
| 105 | + |
| 106 | + for (const span of parsed) { |
| 107 | + const { content, ...style } = span; |
| 108 | + |
| 109 | + const range = new Range( |
| 110 | + lineNumber, |
| 111 | + offset - totalEscapeLength, |
| 112 | + lineNumber, |
| 113 | + offset + content.length - totalEscapeLength |
| 114 | + ); |
| 115 | + |
| 116 | + offset += content.length; |
| 117 | + |
| 118 | + const decorationType = this._getDecorationType(style); |
| 119 | + |
| 120 | + if (!result.has(decorationType)) { |
| 121 | + result.set(decorationType, []); |
| 122 | + } |
| 123 | + |
| 124 | + result.get(decorationType)!.push(range); |
| 125 | + } |
| 126 | + } |
| 127 | + |
| 128 | + return [...result]; |
| 129 | + } |
| 130 | + |
| 131 | + private _getDecorationType(style: AnserStyle): TextEditorDecorationType { |
| 132 | + let decorationType = this._decorationTypes.get(style); |
| 133 | + |
| 134 | + if (decorationType) { |
| 135 | + return decorationType; |
| 136 | + } |
| 137 | + |
| 138 | + const fontWeight = style.decorations.find((s) => s === "bold"); |
| 139 | + const fontStyle = style.decorations.find((s) => s === "italic"); |
| 140 | + const textDecoration = style.decorations.find((s) => s === "underline"); |
| 141 | + |
| 142 | + decorationType = window.createTextEditorDecorationType({ |
| 143 | + backgroundColor: AnsiDecorationProvider._convertColor(style.bg, style.bg_truecolor), |
| 144 | + color: AnsiDecorationProvider._convertColor(style.fg, style.fg_truecolor), |
| 145 | + fontWeight, |
| 146 | + fontStyle, |
| 147 | + textDecoration, |
| 148 | + }); |
| 149 | + |
| 150 | + this._decorationTypes.set(style, decorationType); |
| 151 | + |
| 152 | + return decorationType; |
| 153 | + } |
| 154 | + |
| 155 | + // NOTE: This could just be a kebab-case to camelCase conversion, but I think it's |
| 156 | + // a short enough list to just write these by hand |
| 157 | + static readonly _anserToThemeColor: Record<string, ThemeColor> = { |
| 158 | + "ansi-black": "ansiBlack", |
| 159 | + "ansi-white": "ansiWhite", |
| 160 | + "ansi-red": "ansiRed", |
| 161 | + "ansi-green": "ansiGreen", |
| 162 | + "ansi-yellow": "ansiYellow", |
| 163 | + "ansi-blue": "ansiBlue", |
| 164 | + "ansi-magenta": "ansiMagenta", |
| 165 | + "ansi-cyan": "ansiCyan", |
| 166 | + |
| 167 | + "ansi-bright-black": "ansiBrightBlack", |
| 168 | + "ansi-bright-white": "ansiBrightWhite", |
| 169 | + "ansi-bright-red": "ansiBrightRed", |
| 170 | + "ansi-bright-green": "ansiBrightGreen", |
| 171 | + "ansi-bright-yellow": "ansiBrightYellow", |
| 172 | + "ansi-bright-blue": "ansiBrightBlue", |
| 173 | + "ansi-bright-magenta": "ansiBrightMagenta", |
| 174 | + "ansi-bright-cyan": "ansiBrightCyan", |
| 175 | + }; |
| 176 | + |
| 177 | + private static _convertColor( |
| 178 | + color?: string, |
| 179 | + truecolor?: string |
| 180 | + ): ThemeColor | string | undefined { |
| 181 | + if (!color) { |
| 182 | + return undefined; |
| 183 | + } |
| 184 | + |
| 185 | + if (color === "ansi-truecolor") { |
| 186 | + if (!truecolor) { |
| 187 | + return undefined; |
| 188 | + } |
| 189 | + return `rgb(${truecolor})`; |
| 190 | + } |
| 191 | + |
| 192 | + const paletteMatch = color.match(/ansi-palette-(.+)/); |
| 193 | + if (paletteMatch) { |
| 194 | + const paletteColor = paletteMatch[1]; |
| 195 | + // anser won't return both the RGB and the color name at the same time, |
| 196 | + // so just fake a single foreground control char with the palette number: |
| 197 | + const spans = anser.ansiToJson(`\x1b[38;5;${paletteColor}m`); |
| 198 | + const rgb = spans[1].fg; |
| 199 | + |
| 200 | + if (rgb) { |
| 201 | + return `rgb(${rgb})`; |
| 202 | + } |
| 203 | + } |
| 204 | + |
| 205 | + const themeColor = AnsiDecorationProvider._anserToThemeColor[color]; |
| 206 | + if (themeColor) { |
| 207 | + return new ThemeColor("terminal." + themeColor); |
| 208 | + } |
| 209 | + |
| 210 | + return undefined; |
| 211 | + } |
| 212 | +} |
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