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textDocument_document.cc
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// Copyright 2017-2018 ccls Authors
// SPDX-License-Identifier: Apache-2.0
#include "message_handler.hh"
#include "pipeline.hh"
#include "project.hh"
#include "query.hh"
#include <llvm/ADT/STLExtras.h>
#include <llvm/ADT/StringRef.h>
#include <llvm/Support/Path.h>
#include <algorithm>
using namespace llvm;
MAKE_HASHABLE(ccls::SymbolIdx, t.usr, t.kind);
namespace ccls {
REFLECT_STRUCT(SymbolInformation, name, kind, location, containerName);
namespace {
struct DocumentHighlight {
enum Kind { Text = 1, Read = 2, Write = 3 };
lsRange range;
int kind = 1;
// ccls extension
Role role = Role::None;
bool operator<(const DocumentHighlight &o) const { return !(range == o.range) ? range < o.range : kind < o.kind; }
};
REFLECT_STRUCT(DocumentHighlight, range, kind, role);
} // namespace
void MessageHandler::textDocument_documentHighlight(TextDocumentPositionParam ¶m, ReplyOnce &reply) {
int file_id;
auto [file, wf] = findOrFail(param.textDocument.uri.getPath(), reply, &file_id);
if (!wf)
return;
std::vector<DocumentHighlight> result;
std::vector<SymbolRef> syms = findSymbolsAtLocation(wf, file, param.position, true);
for (auto [sym, refcnt] : file->symbol2refcnt) {
if (refcnt <= 0)
continue;
Usr usr = sym.usr;
Kind kind = sym.kind;
if (std::none_of(syms.begin(), syms.end(), [&](auto &sym1) { return usr == sym1.usr && kind == sym1.kind; }))
continue;
if (auto loc = getLsLocation(db, wfiles, sym, file_id)) {
DocumentHighlight highlight;
highlight.range = loc->range;
if (sym.role & Role::Write)
highlight.kind = DocumentHighlight::Write;
else if (sym.role & Role::Read)
highlight.kind = DocumentHighlight::Read;
else
highlight.kind = DocumentHighlight::Text;
highlight.role = sym.role;
result.push_back(highlight);
}
}
std::sort(result.begin(), result.end());
reply(result);
}
namespace {
struct DocumentLink {
lsRange range;
DocumentUri _target;
};
REFLECT_STRUCT(DocumentLink, range, _target);
} // namespace
void MessageHandler::textDocument_documentLink(TextDocumentParam ¶m, ReplyOnce &reply) {
auto [file, wf] = findOrFail(param.textDocument.uri.getPath(), reply);
if (!wf)
return;
std::vector<DocumentLink> result;
int column;
for (const IndexInclude &include : file->def->includes)
if (std::optional<int> bline = wf->getBufferPosFromIndexPos(include.line, &column, false)) {
const std::string &line = wf->buffer_lines[*bline];
auto start = line.find_first_of("\"<"), end = line.find_last_of("\">");
if (start < end)
result.push_back(
{lsRange{{*bline, (int)start + 1}, {*bline, (int)end}}, DocumentUri::fromPath(include.resolved_path)});
}
reply(result);
} // namespace ccls
namespace {
struct DocumentSymbolParam : TextDocumentParam {
// Include sym if `!(sym.role & excludeRole)`.
Role excludeRole = Role((int)Role::All - (int)Role::Definition - (int)Role::Declaration - (int)Role::Dynamic);
// If >= 0, return Range[] instead of SymbolInformation[] to reduce output.
int startLine = -1;
int endLine = -1;
};
REFLECT_STRUCT(DocumentSymbolParam, textDocument, excludeRole, startLine, endLine);
struct DocumentSymbol {
std::string name;
std::string detail;
SymbolKind kind;
lsRange range;
lsRange selectionRange;
std::vector<std::unique_ptr<DocumentSymbol>> children;
};
void reflect(JsonWriter &vis, std::unique_ptr<DocumentSymbol> &v);
REFLECT_STRUCT(DocumentSymbol, name, detail, kind, range, selectionRange, children);
void reflect(JsonWriter &vis, std::unique_ptr<DocumentSymbol> &v) { reflect(vis, *v); }
template <typename Def> bool ignore(const Def *def) { return false; }
template <> bool ignore(const QueryType::Def *def) { return !def || def->kind == SymbolKind::TypeParameter; }
template <> bool ignore(const QueryVar::Def *def) { return !def || def->is_local(); }
} // namespace
void MessageHandler::textDocument_documentSymbol(JsonReader &reader, ReplyOnce &reply) {
DocumentSymbolParam param;
reflect(reader, param);
int file_id;
auto [file, wf] = findOrFail(param.textDocument.uri.getPath(), reply, &file_id, true);
if (!file)
return;
auto allows = [&](SymbolRef sym) { return !(sym.role & param.excludeRole); };
if (param.startLine >= 0) {
std::vector<lsRange> result;
for (auto [sym, refcnt] : file->symbol2refcnt) {
if (refcnt <= 0 || !allows(sym) ||
!(param.startLine <= sym.range.start.line && sym.range.start.line <= param.endLine))
continue;
if (auto loc = getLsLocation(db, wfiles, sym, file_id))
result.push_back(loc->range);
}
std::sort(result.begin(), result.end());
reply(result);
} else if (g_config->client.hierarchicalDocumentSymbolSupport) {
std::vector<ExtentRef> syms;
syms.reserve(file->symbol2refcnt.size());
for (auto [sym, refcnt] : file->symbol2refcnt)
if (refcnt > 0 && sym.extent.valid())
syms.push_back(sym);
// Global variables `int i, j, k;` have the same extent.start. Sort them by
// range.start instead. In case of a tie, prioritize the widest ExtentRef.
std::sort(syms.begin(), syms.end(), [](const ExtentRef &lhs, const ExtentRef &rhs) {
return std::tie(lhs.range.start, rhs.extent.end) < std::tie(rhs.range.start, lhs.extent.end);
});
std::vector<std::unique_ptr<DocumentSymbol>> res;
std::vector<DocumentSymbol *> scopes;
for (ExtentRef sym : syms) {
auto ds = std::make_unique<DocumentSymbol>();
if (auto range = getLsRange(wf, sym.range)) {
ds->selectionRange = *range;
ds->range = ds->selectionRange;
// For a macro expansion, M(name), we may use `M` for extent and
// `name` for spell, do the check as selectionRange must be a subrange
// of range.
if (sym.extent.valid())
if (auto range1 = getLsRange(wf, sym.extent); range1 && range1->includes(*range))
ds->range = *range1;
}
withEntity(db, sym, [&](const auto &entity) {
const auto *def = entity.anyDef();
if (!def)
return;
ds->name = def->name(false);
ds->detail = def->detailed_name;
ds->kind = def->kind;
if (!ignore(def) && (ds->kind == SymbolKind::Namespace || allows(sym))) {
// Drop scopes which are before selectionRange.start. In
// `int i, j, k;`, the scope of i will be ended by j.
while (!scopes.empty() && scopes.back()->range.end <= ds->selectionRange.start)
scopes.pop_back();
auto *ds1 = ds.get();
if (scopes.empty())
res.push_back(std::move(ds));
else
scopes.back()->children.push_back(std::move(ds));
scopes.push_back(ds1);
}
});
}
reply(res);
} else {
std::vector<SymbolInformation> result;
for (auto [sym, refcnt] : file->symbol2refcnt) {
if (refcnt <= 0 || !allows(sym))
continue;
if (std::optional<SymbolInformation> info = getSymbolInfo(db, sym, false)) {
if ((sym.kind == Kind::Type && ignore(db->getType(sym).anyDef())) ||
(sym.kind == Kind::Var && ignore(db->getVar(sym).anyDef())))
continue;
if (auto loc = getLsLocation(db, wfiles, sym, file_id)) {
info->location = *loc;
result.push_back(*info);
}
}
}
reply(result);
}
}
void MessageHandler::textDocument_switchSourceHeader(TextDocumentIdentifier ¶m, ReplyOnce &reply) {
QueryFile *file;
WorkingFile *wf;
std::tie(file, wf) = findOrFail(param.uri.getPath(), reply);
if (!wf)
return reply(JsonNull{});
int file_id = file->id;
DocumentUri result;
const std::string &path = wf->filename;
bool is_hdr = lookupExtension(path).second;
// Vote for each interesting symbol's definitions (for header) or declarations (for non-header).
// Select the file with the most votes.
// Ignore Type symbols to skip class forward declarations and namespaces.
std::unordered_map<int, int> file_id2cnt;
for (auto [sym, refcnt] : file->symbol2refcnt) {
if (refcnt <= 0 || !sym.extent.valid() || sym.kind == Kind::Type)
continue;
if (is_hdr) {
withEntity(db, sym, [&](const auto &entity) {
for (auto &def : entity.def)
if (def.spell && def.file_id != file_id)
++file_id2cnt[def.file_id];
});
} else {
for (DeclRef dr : getNonDefDeclarations(db, sym))
if (dr.file_id != file_id)
++file_id2cnt[dr.file_id];
}
}
if (file_id2cnt.size()) {
auto best = file_id2cnt.begin();
for (auto it = file_id2cnt.begin(); it != file_id2cnt.end(); ++it)
if (it->second > best->second || (it->second == best->second && it->first < best->first))
best = it;
if (auto &def = db->files[best->first].def)
return reply(DocumentUri::fromPath(def->path));
}
if (is_hdr) {
// Check if `path` is in a #include entry.
for (QueryFile &file1 : db->files) {
auto &def = file1.def;
if (!def || lookupExtension(def->path).second)
continue;
for (IndexInclude &include : def->includes)
if (path == include.resolved_path)
return reply(DocumentUri::fromPath(def->path));
}
return reply(JsonNull{});
}
// Otherwise, find the #include with the same stem.
StringRef stem = sys::path::stem(path);
for (IndexInclude &include : file->def->includes)
if (sys::path::stem(include.resolved_path) == stem)
return reply(DocumentUri::fromPath(std::string(include.resolved_path)));
reply(JsonNull{});
}
} // namespace ccls