Implement DocumentLink (#107)

include/Server/Indexer.h

@@ -98,6 +98,8 @@ public:
 
     async::Task<std::vector<feature::FoldingRange>> foldingRanges(llvm::StringRef file) const;
 
+    async::Task<std::vector<feature::DocumentLink>> documentLinks(llvm::StringRef file) const;
+
 private:
     async::Task<> index(std::string file);
 

include/Server/LSPConverter.h

@@ -7,6 +7,7 @@
 #include "Feature/FoldingRange.h"
 #include "Feature/DocumentSymbol.h"
 #include "Feature/SemanticTokens.h"
+#include "Feature/DocumentLink.h"
 #include "Server/Protocol.h"
 
 namespace clice {
@@ -36,10 +37,15 @@ public:
     std::vector<proto::FoldingRange> transform(llvm::StringRef content,
                                                llvm::ArrayRef<feature::FoldingRange> foldings);
 
+    std::vector<proto::DocumentLink> transform(llvm::StringRef content,
+                                               llvm::ArrayRef<feature::DocumentLink> links);
+
     Result convert(llvm::StringRef path, llvm::ArrayRef<feature::SemanticToken> tokens);
 
     Result convert(llvm::StringRef path, llvm::ArrayRef<feature::FoldingRange> foldings);
 
+    Result convert(llvm::StringRef path, llvm::ArrayRef<feature::DocumentLink> links);
+
     Result convert(const feature::Hover& hover);
 
 private:

include/Server/Protocol.h

@@ -289,6 +289,11 @@ enum class FoldingRangeKind {
     Region,
 };
 
+struct DocumentLink {
+    Range range;
+    URI target;
+};
+
 /// Represents a folding range. To be valid, start and end line must be bigger
 /// than zero and smaller than the number of lines in the document. Clients
 /// are free to ignore invalid ranges.
@@ -366,6 +371,14 @@ struct ServerCapabilities {
     /// The server provides semantic tokens support.
     SemanticTokensOptions semanticTokensProvider;
 
+    struct DocumentLinkOptions {
+        /// Document links have a resolve provider as well.
+        bool resolveProvider = false;
+    };
+
+    /// The server provides document link support.
+    DocumentLinkOptions documentLinkProvider;
+
     /// The server provides folding provider support.
     bool foldingRangeProvider = true;
 };
@@ -425,6 +438,8 @@ using SemanticTokensParams = TextDocumentParams;
 
 using FoldingRangeParams = TextDocumentParams;
 
+using DocumentLinkParams = TextDocumentParams;
+
 struct HeaderContext {
     /// The path of context file.
     std::string file;