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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "ShellComprehensionEngine.h"
#include <AK/Assertions.h>
#include <AK/HashTable.h>
#include <LibRegex/Regex.h>
#include <Userland/DevTools/HackStudio/LanguageServers/ConnectionFromClient.h>
namespace LanguageServers::Shell {
RefPtr<::Shell::Shell> ShellComprehensionEngine::s_shell {};
ShellComprehensionEngine::ShellComprehensionEngine(FileDB const& filedb)
: CodeComprehensionEngine(filedb, true)
{
}
ShellComprehensionEngine::DocumentData const& ShellComprehensionEngine::get_or_create_document_data(String const& file)
{
auto absolute_path = filedb().to_absolute_path(file);
if (!m_documents.contains(absolute_path)) {
set_document_data(absolute_path, create_document_data_for(absolute_path));
}
return get_document_data(absolute_path);
}
ShellComprehensionEngine::DocumentData const& ShellComprehensionEngine::get_document_data(String const& file) const
{
auto absolute_path = filedb().to_absolute_path(file);
auto document_data = m_documents.get(absolute_path);
VERIFY(document_data.has_value());
return *document_data.value();
}
OwnPtr<ShellComprehensionEngine::DocumentData> ShellComprehensionEngine::create_document_data_for(String const& file)
{
auto document = filedb().get(file);
if (!document)
return {};
auto content = document->text();
auto document_data = make<DocumentData>(document->text(), file);
for (auto& path : document_data->sourced_paths())
get_or_create_document_data(path);
update_declared_symbols(*document_data);
return document_data;
}
void ShellComprehensionEngine::set_document_data(String const& file, OwnPtr<DocumentData>&& data)
{
m_documents.set(filedb().to_absolute_path(file), move(data));
}
ShellComprehensionEngine::DocumentData::DocumentData(String&& _text, String _filename)
: filename(move(_filename))
, text(move(_text))
, node(parse())
{
}
Vector<String> const& ShellComprehensionEngine::DocumentData::sourced_paths() const
{
if (all_sourced_paths.has_value())
return all_sourced_paths.value();
struct : public ::Shell::AST::NodeVisitor {
void visit(const ::Shell::AST::CastToCommand* node) override
{
auto& inner = node->inner();
if (inner->is_list()) {
if (auto* list = dynamic_cast<const ::Shell::AST::ListConcatenate*>(inner.ptr())) {
auto& entries = list->list();
if (entries.size() == 2 && entries.first()->is_bareword() && static_ptr_cast<::Shell::AST::BarewordLiteral>(entries.first())->text() == "source") {
auto& filename = entries[1];
if (filename->would_execute())
return;
auto name_list = const_cast<::Shell::AST::Node*>(filename.ptr())->run(nullptr)->resolve_as_list(nullptr);
StringBuilder builder;
builder.join(" ", name_list);
sourced_files.set(builder.build());
}
}
}
::Shell::AST::NodeVisitor::visit(node);
}
HashTable<String> sourced_files;
} visitor;
node->visit(visitor);
Vector<String> sourced_paths;
for (auto& entry : visitor.sourced_files)
sourced_paths.append(move(entry));
all_sourced_paths = move(sourced_paths);
return all_sourced_paths.value();
}
NonnullRefPtr<::Shell::AST::Node> ShellComprehensionEngine::DocumentData::parse() const
{
::Shell::Parser parser { text };
if (auto node = parser.parse())
return node.release_nonnull();
return ::Shell::AST::make_ref_counted<::Shell::AST::SyntaxError>(::Shell::AST::Position {}, "Unable to parse file");
}
size_t ShellComprehensionEngine::resolve(ShellComprehensionEngine::DocumentData const& document, const GUI::TextPosition& position)
{
size_t offset = 0;
if (position.line() > 0) {
auto first = true;
size_t line = 0;
for (auto& line_view : document.text.split_limit('\n', position.line() + 1, true)) {
if (line == position.line())
break;
if (first)
first = false;
else
++offset; // For the newline.
offset += line_view.length();
++line;
}
}
offset += position.column() + 1;
return offset;
}
Vector<GUI::AutocompleteProvider::Entry> ShellComprehensionEngine::get_suggestions(String const& file, const GUI::TextPosition& position)
{
dbgln_if(SH_LANGUAGE_SERVER_DEBUG, "ShellComprehensionEngine position {}:{}", position.line(), position.column());
auto const& document = get_or_create_document_data(file);
size_t offset_in_file = resolve(document, position);
::Shell::AST::HitTestResult hit_test = document.node->hit_test_position(offset_in_file);
if (!hit_test.matching_node) {
dbgln_if(SH_LANGUAGE_SERVER_DEBUG, "no node at position {}:{}", position.line(), position.column());
return {};
}
auto completions = const_cast<::Shell::AST::Node*>(document.node.ptr())->complete_for_editor(shell(), offset_in_file, hit_test);
Vector<GUI::AutocompleteProvider::Entry> entries;
for (auto& completion : completions)
entries.append({ completion.text_string, completion.input_offset });
return entries;
}
void ShellComprehensionEngine::on_edit(String const& file)
{
set_document_data(file, create_document_data_for(file));
}
void ShellComprehensionEngine::file_opened([[maybe_unused]] String const& file)
{
set_document_data(file, create_document_data_for(file));
}
Optional<GUI::AutocompleteProvider::ProjectLocation> ShellComprehensionEngine::find_declaration_of(String const& filename, const GUI::TextPosition& identifier_position)
{
dbgln_if(SH_LANGUAGE_SERVER_DEBUG, "find_declaration_of({}, {}:{})", filename, identifier_position.line(), identifier_position.column());
auto const& document = get_or_create_document_data(filename);
auto position = resolve(document, identifier_position);
auto result = document.node->hit_test_position(position);
if (!result.matching_node) {
dbgln_if(SH_LANGUAGE_SERVER_DEBUG, "no node at position {}:{}", identifier_position.line(), identifier_position.column());
return {};
}
if (!result.matching_node->is_bareword()) {
dbgln_if(SH_LANGUAGE_SERVER_DEBUG, "no bareword at position {}:{}", identifier_position.line(), identifier_position.column());
return {};
}
auto name = static_ptr_cast<::Shell::AST::BarewordLiteral>(result.matching_node)->text();
auto& declarations = all_declarations();
for (auto& entry : declarations) {
for (auto& declaration : entry.value) {
if (declaration.name == name)
return declaration.position;
}
}
return {};
}
void ShellComprehensionEngine::update_declared_symbols(DocumentData const& document)
{
struct Visitor : public ::Shell::AST::NodeVisitor {
explicit Visitor(String const& filename)
: filename(filename)
{
}
void visit(const ::Shell::AST::VariableDeclarations* node) override
{
for (auto& entry : node->variables()) {
auto literal = entry.name->leftmost_trivial_literal();
if (!literal)
continue;
String name;
if (literal->is_bareword())
name = static_ptr_cast<::Shell::AST::BarewordLiteral>(literal)->text();
if (!name.is_empty()) {
dbgln("Found variable {}", name);
declarations.append({ move(name), { filename, entry.name->position().start_line.line_number, entry.name->position().start_line.line_column }, GUI::AutocompleteProvider::DeclarationType::Variable, {} });
}
}
::Shell::AST::NodeVisitor::visit(node);
}
void visit(const ::Shell::AST::FunctionDeclaration* node) override
{
dbgln("Found function {}", node->name().name);
declarations.append({ node->name().name, { filename, node->position().start_line.line_number, node->position().start_line.line_column }, GUI::AutocompleteProvider::DeclarationType::Function, {} });
}
String const& filename;
Vector<GUI::AutocompleteProvider::Declaration> declarations;
} visitor { document.filename };
document.node->visit(visitor);
set_declarations_of_document(document.filename, move(visitor.declarations));
}
}
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