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import * as vscode from "vscode";
import { findElementAt, parseXml } from "../language/xmlParser";
import { resolveElementType } from "../language/typeContext";
import * as model from "../model/schemaModel";
import type { ModWorkspace } from "../workspace";
import type { ModIndex } from "../indexer/types";
import {
isReferenceAttributeOfType,
resolveReferenceTargetsForType,
} from "../indexer/refs";
import { dirname } from "node:path";
import { buildSearchPaths, resolveSource } from "../indexer/includeResolver";
export class Ra3HoverProvider implements vscode.HoverProvider {
constructor(private ws: ModWorkspace) {}
async provideHover(
document: vscode.TextDocument,
position: vscode.Position,
_token: vscode.CancellationToken,
): Promise<vscode.Hover | null> {
const text = document.getText();
const offset = document.offsetAt(position);
const doc = parseXml(text);
const el = findElementAt(doc, offset);
if (!el) return null;
const elType = resolveElementType(el);
// Attribute name.
for (const attr of el.attrs) {
if (offset >= attr.nameStart && offset <= attr.nameEnd) {
return this.attributeHover(elType, attr.name);
}
}
// Attribute value.
for (const attr of el.attrs) {
if (attr.hasValue && offset >= attr.valueStart && offset <= attr.valueEnd) {
return this.valueHover(el, elType, attr.name, attr.value, document, this.ws.index);
}
}
// Element name.
const nameStart = el.start + 1;
if (offset >= nameStart && offset <= nameStart + el.name.length) {
return this.elementHover(el.name);
}
return null;
}
private elementHover(name: string): vscode.Hover | null {
const type = model.elementTypeName(name);
const info = type ? model.typeInfo(type) : undefined;
const md = new vscode.MarkdownString();
md.appendCodeblock(`<${name}>`, "xml");
if (model.isTopLevelElement(name)) md.appendMarkdown(`**Top-level asset element** \n`);
if (info?.kind === "complex") {
if (info.doc) md.appendMarkdown(`${info.doc} \n`);
md.appendMarkdown(
`Attributes: ${info.attributes.length} · Children: ${info.children.length} \n`,
);
if (info.base) md.appendMarkdown(`Extends: \`${info.base}\``);
} else if (info?.kind === "simple") {
md.appendMarkdown(`Simple type: \`${type}\``);
} else if (type) {
md.appendMarkdown(`Type: \`${type}\``);
} else {
md.appendMarkdown("Not found in the bundled XSD model.");
}
return new vscode.Hover(md);
}
private attributeHover(elementType: string | null, attrName: string): vscode.Hover | null {
const attrs = model.attributesOfType(elementType);
const attr = attrs.find((a) => a.name === attrName);
const md = new vscode.MarkdownString();
md.appendCodeblock(`${attrName}=""`, "xml");
if (!attr) {
if (/^(xmlns|xai:)/.test(attrName)) {
md.appendMarkdown(`Namespace/instance attribute.`);
return new vscode.Hover(md);
}
md.appendMarkdown("Unknown attribute for this element.");
return new vscode.Hover(md);
}
if (attr.doc) md.appendMarkdown(`${attr.doc} \n`);
if (attr.required) md.appendMarkdown(`**Required** \n`);
if (attr.refType) md.appendMarkdown(`References assets of type \`${attr.refType}\` \n`);
if (attr.enumValues.length)
md.appendMarkdown(`Values: \`${attr.enumValues.join("`, `")}\` \n`);
if (attr.default != null) md.appendMarkdown(`Default: \`${attr.default}\` \n`);
if (attr.allowsDefine) md.appendMarkdown(`May use \`$DEFINE\` constants \n`);
md.appendMarkdown(`Type: \`${attr.type ?? "string"}\``);
return new vscode.Hover(md);
}
private valueHover(
el: { name: string },
elType: string | null,
attrName: string,
value: string,
document: vscode.TextDocument,
idx: ModIndex | null,
): vscode.Hover | null {
const md = new vscode.MarkdownString();
// $DEFINE reference.
const defineMatch = /\$([A-Za-z_][A-Za-z0-9_]*)/.exec(value);
if (defineMatch && idx) {
const defs = idx.defines.get(defineMatch[1].toLowerCase());
if (defs?.length) {
const d = defs[0];
md.appendMarkdown(`**Define** \`$${d.name}\` \n`);
md.appendCodeblock(d.value);
const rel = relativePath(document, d.file);
md.appendMarkdown(`Defined in \`${rel}:${d.line}\``);
return new vscode.Hover(md);
}
}
// Include source.
if (el.name === "Include" && attrName === "source") {
const resolved = idx
? resolveSource(
value,
dirname(document.uri.fsPath),
buildSearchPaths(idx.sdkDir, idx.projectDir),
).path
: null;
if (resolved) {
md.appendMarkdown(`**Include source** \n`);
md.appendCodeblock(resolved);
return new vscode.Hover(md);
}
const cand = idx?.sourceCandidates.find((c) => c.source === value);
if (cand) {
md.appendMarkdown(`**Include source** \n`);
md.appendCodeblock(cand.path);
return new vscode.Hover(md);
}
md.appendMarkdown(`Include source: \`${value}\` (not in candidate index)`);
return new vscode.Hover(md);
}
// Asset reference / inheritFrom.
if (idx) {
if (!isReferenceAttributeOfType(elType, attrName)) return null;
const targets = resolveReferenceTargetsForType(idx, elType, attrName, value);
if (targets.length) {
const md2 = new vscode.MarkdownString();
md2.appendMarkdown(`**${targets.length} definition${targets.length > 1 ? "s" : ""}** \n`);
for (const { def: d } of targets.slice(0, 8)) {
const loc =
d.origin === "manifest"
? `manifest \`${d.manifestSource ?? d.file}\``
: `\`${relativePath(document, d.file)}:${d.line}\``;
md2.appendMarkdown(`- \`${d.type}\` · ${loc} \n`);
}
return new vscode.Hover(md2);
}
const attrRef = model
.attributesOfType(elType)
.find((a) => a.name === attrName);
const expected = attrRef?.refType
? ` of type \`${attrRef.refType}\``
: attrRef?.isRef
? " of the expected declared type"
: "";
md.appendMarkdown(
`No matching definition${expected} in the current index` +
" (may exist in a compiled manifest or vanilla data).",
);
return new vscode.Hover(md);
}
return null;
}
}
function relativePath(document: vscode.TextDocument, abs: string): string {
const root = vscode.workspace.getWorkspaceFolder(document.uri)?.uri.fsPath;
if (!root) return abs;
const rel = abs.toLowerCase().startsWith(root.toLowerCase())
? abs.slice(root.length + 1)
: abs;
return rel;
}