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import * as vscode from 'vscode';
import { TextMateRuleSettings } from './scopes';
let mappings = new Map<string, string[]>();
const defaultMapping = new Map<string, string[]>([
[
'comment',
[
'comment',
'comment.block',
'comment.line',
'comment.block.documentation',
],
],
['string', ['string']],
['keyword', ['keyword']],
['keyword.control', ['keyword.control', 'keyword', 'keyword.other']],
[
'keyword.unsafe',
['storage.modifier', 'keyword.other', 'keyword.control', 'keyword'],
],
['function', ['entity.name.function']],
['parameter', ['variable.parameter']],
['constant', ['constant', 'variable']],
['type', ['entity.name.type']],
['builtin', ['variable.language', 'support.type', 'support.type']],
['text', ['string', 'string.quoted', 'string.regexp']],
['attribute', ['keyword']],
['literal', ['string', 'string.quoted', 'string.regexp']],
['macro', ['entity.name.function', 'keyword.other', 'entity.name.macro']],
['variable', ['variable']],
['variable.mut', ['variable', 'storage.modifier']],
[
'field',
[
'variable.object.property',
'meta.field.declaration',
'meta.definition.property',
'variable.other',
],
],
['module', ['entity.name.section', 'entity.other']],
]);
export function find(scope: string): string[] {
return mappings.get(scope) || [];
}
export function toRule(
scope: string,
intoRule: (scope: string) => TextMateRuleSettings | undefined,
): TextMateRuleSettings | undefined {
return find(scope)
.map(intoRule)
.filter(rule => rule !== undefined)[0];
}
function isString(value: any): value is string {
return typeof value === 'string';
}
function isArrayOfString(value: any): value is string[] {
return Array.isArray(value) && value.every(item => isString(item));
}
export function load() {
const rawConfig: { [key: string]: any } =
vscode.workspace
.getConfiguration('rust-analyzer')
.get('scopeMappings') || {};
mappings = Object.entries(rawConfig)
.filter(([_, value]) => isString(value) || isArrayOfString(value))
.reduce((list, [key, value]: [string, string | string[]]) => {
return list.set(key, isString(value) ? [value] : value);
}, defaultMapping);
}
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