vscode-css-languageservice
Version:
Language service for CSS, LESS and SCSS
146 lines (145 loc) • 5.94 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
;
import * as nodes from '../parser/cssNodes';
import * as languageFacts from '../languageFacts/facts';
import { selectorToMarkedString, simpleSelectorToMarkedString } from './selectorPrinting';
import { startsWith } from '../utils/strings';
import { Range, MarkupKind } from '../cssLanguageTypes';
import { isDefined } from '../utils/objects';
var CSSHover = /** @class */ (function () {
function CSSHover(clientCapabilities) {
this.clientCapabilities = clientCapabilities;
}
CSSHover.prototype.doHover = function (document, position, stylesheet) {
function getRange(node) {
return Range.create(document.positionAt(node.offset), document.positionAt(node.end));
}
var offset = document.offsetAt(position);
var nodepath = nodes.getNodePath(stylesheet, offset);
/**
* nodepath is top-down
* Build up the hover by appending inner node's information
*/
var hover = null;
for (var i = 0; i < nodepath.length; i++) {
var node = nodepath[i];
if (node instanceof nodes.Selector) {
hover = {
contents: selectorToMarkedString(node),
range: getRange(node)
};
break;
}
if (node instanceof nodes.SimpleSelector) {
/**
* Some sass specific at rules such as `@at-root` are parsed as `SimpleSelector`
*/
if (!startsWith(node.getText(), '@')) {
hover = {
contents: simpleSelectorToMarkedString(node),
range: getRange(node)
};
}
break;
}
if (node instanceof nodes.Declaration) {
var propertyName = node.getFullPropertyName();
var entry = languageFacts.cssDataManager.getProperty(propertyName);
if (entry) {
var contents = languageFacts.getEntryDescription(entry, this.doesSupportMarkdown());
if (contents) {
hover = {
contents: contents,
range: getRange(node)
};
}
else {
hover = null;
}
}
continue;
}
if (node instanceof nodes.UnknownAtRule) {
var atRuleName = node.getText();
var entry = languageFacts.cssDataManager.getAtDirective(atRuleName);
if (entry) {
var contents = languageFacts.getEntryDescription(entry, this.doesSupportMarkdown());
if (contents) {
hover = {
contents: contents,
range: getRange(node)
};
}
else {
hover = null;
}
}
continue;
}
if (node instanceof nodes.Node && node.type === nodes.NodeType.PseudoSelector) {
var selectorName = node.getText();
var entry = selectorName.slice(0, 2) === '::'
? languageFacts.cssDataManager.getPseudoElement(selectorName)
: languageFacts.cssDataManager.getPseudoClass(selectorName);
if (entry) {
var contents = languageFacts.getEntryDescription(entry, this.doesSupportMarkdown());
if (contents) {
hover = {
contents: contents,
range: getRange(node)
};
}
else {
hover = null;
}
}
continue;
}
}
if (hover) {
hover.contents = this.convertContents(hover.contents);
}
return hover;
};
CSSHover.prototype.convertContents = function (contents) {
if (!this.doesSupportMarkdown()) {
if (typeof contents === 'string') {
return contents;
}
// MarkupContent
else if ('kind' in contents) {
return {
kind: 'plaintext',
value: contents.value
};
}
// MarkedString[]
else if (Array.isArray(contents)) {
return contents.map(function (c) {
return typeof c === 'string' ? c : c.value;
});
}
// MarkedString
else {
return contents.value;
}
}
return contents;
};
CSSHover.prototype.doesSupportMarkdown = function () {
if (!isDefined(this.supportsMarkdown)) {
if (!isDefined(this.clientCapabilities)) {
this.supportsMarkdown = true;
return this.supportsMarkdown;
}
var hover = this.clientCapabilities.textDocument && this.clientCapabilities.textDocument.hover;
this.supportsMarkdown = hover && hover.contentFormat && Array.isArray(hover.contentFormat) && hover.contentFormat.indexOf(MarkupKind.Markdown) !== -1;
}
return this.supportsMarkdown;
};
return CSSHover;
}());
export { CSSHover };