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cquery_call_hierarchy.cc
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cquery_call_hierarchy.cc
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#include "message_handler.h"
#include "query_utils.h"
#include "queue_manager.h"
#include <loguru.hpp>
namespace {
MethodType kMethodType = "$cquery/callHierarchy";
enum class CallType : uint8_t {
Direct = 0,
Base = 1,
Derived = 2,
All = 1 | 2
};
MAKE_REFLECT_TYPE_PROXY(CallType);
bool operator&(CallType lhs, CallType rhs) {
return uint8_t(lhs) & uint8_t(rhs);
}
struct In_CqueryCallHierarchy : public RequestInMessage {
MethodType GetMethodType() const override { return kMethodType; }
struct Params {
// If id is specified, expand a node; otherwise textDocument+position should
// be specified for building the root and |levels| of nodes below.
lsTextDocumentIdentifier textDocument;
lsPosition position;
Maybe<QueryId::Func> id;
// true: callee tree (functions called by this function); false: caller tree
// (where this function is called)
bool callee = false;
// Base: include base functions; All: include both base and derived
// functions.
CallType callType = CallType::All;
bool detailedName = false;
int levels = 1;
};
Params params;
};
MAKE_REFLECT_STRUCT(In_CqueryCallHierarchy::Params,
textDocument,
position,
id,
callee,
callType,
detailedName,
levels);
MAKE_REFLECT_STRUCT(In_CqueryCallHierarchy, id, params);
REGISTER_IN_MESSAGE(In_CqueryCallHierarchy);
struct Out_CqueryCallHierarchy : public lsOutMessage<Out_CqueryCallHierarchy> {
struct Entry {
QueryId::Func id;
std::string_view name;
lsLocation location;
CallType callType = CallType::Direct;
int numChildren;
// Empty if the |levels| limit is reached.
std::vector<Entry> children;
};
lsRequestId id;
optional<Entry> result;
};
MAKE_REFLECT_STRUCT(Out_CqueryCallHierarchy::Entry,
id,
name,
location,
callType,
numChildren,
children);
MAKE_REFLECT_STRUCT_OPTIONALS_MANDATORY(Out_CqueryCallHierarchy,
jsonrpc,
id,
result);
bool Expand(MessageHandler* m,
Out_CqueryCallHierarchy::Entry* entry,
bool callee,
CallType call_type,
bool detailed_name,
int levels) {
const QueryFunc& func = m->db->GetFunc(entry->id);
const QueryFunc::Def* def = func.AnyDef();
entry->numChildren = 0;
if (!def)
return false;
auto handle = [&](QueryId::LexicalRef ref, CallType call_type) {
entry->numChildren++;
if (levels > 0) {
Out_CqueryCallHierarchy::Entry entry1;
entry1.id = QueryId::Func(ref.id);
if (auto loc = GetLsLocation(m->db, m->working_files, ref))
entry1.location = *loc;
entry1.callType = call_type;
if (Expand(m, &entry1, callee, call_type, detailed_name, levels - 1))
entry->children.push_back(std::move(entry1));
}
};
auto handle_uses = [&](const QueryFunc& func, CallType call_type) {
if (callee) {
if (const auto* def = func.AnyDef())
for (const QueryId::SymbolRef& ref : def->callees) {
if (ref.kind == SymbolKind::Func)
handle(QueryId::LexicalRef(ref.range, ref.id, ref.kind, ref.role,
def->file),
call_type);
}
} else {
for (QueryId::LexicalRef ref : func.uses)
if (ref.kind == SymbolKind::Func)
handle(ref, call_type);
}
};
std::unordered_set<Usr> seen;
seen.insert(func.usr);
std::vector<const QueryFunc*> stack;
if (detailed_name)
entry->name = def->detailed_name;
else
entry->name = def->ShortName();
handle_uses(func, CallType::Direct);
// Callers/callees of base functions.
if (call_type & CallType::Base) {
stack.push_back(&func);
while (stack.size()) {
const QueryFunc& func1 = *stack.back();
stack.pop_back();
if (auto* def1 = func1.AnyDef()) {
EachDefinedFunc(m->db, def1->bases, [&](QueryFunc& func2) {
if (!seen.count(func2.usr)) {
seen.insert(func2.usr);
stack.push_back(&func2);
handle_uses(func2, CallType::Base);
}
});
}
}
}
// Callers/callees of derived functions.
if (call_type & CallType::Derived) {
stack.push_back(&func);
while (stack.size()) {
const QueryFunc& func1 = *stack.back();
stack.pop_back();
EachDefinedFunc(m->db, func1.derived, [&](QueryFunc& func2) {
if (!seen.count(func2.usr)) {
seen.insert(func2.usr);
stack.push_back(&func2);
handle_uses(func2, CallType::Derived);
}
});
}
}
return true;
}
struct Handler_CqueryCallHierarchy
: BaseMessageHandler<In_CqueryCallHierarchy> {
MethodType GetMethodType() const override { return kMethodType; }
optional<Out_CqueryCallHierarchy::Entry> BuildInitial(QueryId::Func root_id,
bool callee,
CallType call_type,
bool detailed_name,
int levels) {
const auto* def = db->GetFunc(root_id).AnyDef();
if (!def)
return {};
Out_CqueryCallHierarchy::Entry entry;
entry.id = root_id;
entry.callType = CallType::Direct;
if (def->spell) {
if (optional<lsLocation> loc =
GetLsLocation(db, working_files, *def->spell))
entry.location = *loc;
}
Expand(this, &entry, callee, call_type, detailed_name, levels);
return entry;
}
void Run(In_CqueryCallHierarchy* request) override {
const auto& params = request->params;
Out_CqueryCallHierarchy out;
out.id = request->id;
if (params.id) {
Out_CqueryCallHierarchy::Entry entry;
entry.id = *params.id;
entry.callType = CallType::Direct;
if (entry.id.id < db->funcs.size())
Expand(this, &entry, params.callee, params.callType,
params.detailedName, params.levels);
out.result = std::move(entry);
} else {
QueryFile* file;
if (!FindFileOrFail(db, project, request->id,
params.textDocument.uri.GetAbsolutePath(), &file))
return;
WorkingFile* working_file =
working_files->GetFileByFilename(file->def->path);
for (QueryId::SymbolRef sym :
FindSymbolsAtLocation(working_file, file, params.position)) {
if (sym.kind == SymbolKind::Func) {
out.result =
BuildInitial(QueryId::Func(sym.id), params.callee,
params.callType, params.detailedName, params.levels);
break;
}
}
}
QueueManager::WriteStdout(kMethodType, out);
}
};
REGISTER_MESSAGE_HANDLER(Handler_CqueryCallHierarchy);
} // namespace