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20939: Adds a DefinitionProvider, MINOR (#17)
Adds a DefinitionProvider, which enables users to use F12 or "Go To Definition" on symbols. It will search for the version where a '#' is in front of it within all `.amlg` files in the project. --------- Co-authored-by: Matt Fulp <8397318+fulpm@users.noreply.github.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| import * as vscode from "vscode"; | ||
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| export class AmalgamDefinitionProvider implements vscode.DefinitionProvider { | ||
| async provideDefinition( | ||
| document: vscode.TextDocument, | ||
| position: vscode.Position, | ||
| token: vscode.CancellationToken | ||
| ): Promise<vscode.Definition | vscode.LocationLink[] | undefined> { | ||
| const wordRange = document.getWordRangeAtPosition(position); | ||
| if (!wordRange) { | ||
| return undefined; | ||
| } | ||
| let word = document.getText(wordRange); | ||
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| // Check for label scope character before the word | ||
| if (wordRange.start.character > 0) { | ||
| const charBeforeWord = document.getText(new vscode.Range(wordRange.start.translate(0, -1), wordRange.start)); | ||
| if (charBeforeWord === "!") { | ||
| word = "!" + word; | ||
| } else if (charBeforeWord === "^") { | ||
| word = "\\^" + word; | ||
| } | ||
| } | ||
| // Find a label definition by meeting the following criteria: | ||
| // 1. The label word is not preceded by a semicolon, representing a comment | ||
| // 2. The label word is only immediately preceded by a single `#` | ||
| // 3. The label word is immediately followed by at least one whitespace or the end of the line | ||
| // We then capture the text leading up to the matched definition and the definition word itself | ||
| const definitionPattern = new RegExp(`^([^;]*)(?<!#)(#${word})(?:\\s+|$).*$`); | ||
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| // Get all Amalgam file URIs in the workspace | ||
| const workspaceFolder = vscode.workspace.getWorkspaceFolder(document.uri); | ||
| if (!workspaceFolder) { | ||
| return undefined; | ||
| } | ||
| const files = await vscode.workspace.findFiles( | ||
| new vscode.RelativePattern(workspaceFolder.uri, "**/**.amlg"), | ||
| undefined, | ||
| undefined, | ||
| token | ||
| ); | ||
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| // For each file check each line for matches to the definition pattern | ||
| const locations: vscode.Location[] = []; | ||
| for (const uri of files) { | ||
| if (token.isCancellationRequested) { | ||
| return undefined; | ||
| } | ||
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| const file = await vscode.workspace.openTextDocument(uri); | ||
| for (let i = 0; i < file.lineCount; i++) { | ||
| if (token.isCancellationRequested) { | ||
| return undefined; | ||
| } | ||
| const line = file.lineAt(i); | ||
| const matches = definitionPattern.exec(line.text); | ||
| if (matches) { | ||
| const definitionPosition = new vscode.Position(i, matches[1].length); | ||
| locations.push(new vscode.Location(file.uri, definitionPosition)); | ||
| } | ||
| } | ||
| } | ||
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| return locations; | ||
| } | ||
| } |