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/*
* Copyright (c) 2020, the SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "NodeVisitor.h"
#include <AK/Forward.h>
#include <AK/StringBuilder.h>
#include <AK/StringView.h>
#include <AK/Types.h>
#include <ctype.h>
namespace Shell {
class Formatter final : public AST::NodeVisitor {
public:
Formatter(const StringView& source, ssize_t cursor = -1)
: m_builder(round_up_to_power_of_two(source.length(), 16))
, m_source(source)
, m_cursor(cursor)
{
size_t offset = 0;
for (auto ptr = m_source.end() - 1; ptr >= m_source.begin() && isspace(*ptr); --ptr)
++offset;
m_trivia = m_source.substring_view(m_source.length() - offset, offset);
}
explicit Formatter(const AST::Node& node)
: m_cursor(-1)
, m_root_node(node)
{
}
String format();
size_t cursor() const { return m_output_cursor; }
private:
virtual void visit(const AST::PathRedirectionNode*) override;
virtual void visit(const AST::And*) override;
virtual void visit(const AST::ListConcatenate*) override;
virtual void visit(const AST::Background*) override;
virtual void visit(const AST::BarewordLiteral*) override;
virtual void visit(const AST::BraceExpansion*) override;
virtual void visit(const AST::CastToCommand*) override;
virtual void visit(const AST::CastToList*) override;
virtual void visit(const AST::CloseFdRedirection*) override;
virtual void visit(const AST::CommandLiteral*) override;
virtual void visit(const AST::Comment*) override;
virtual void visit(const AST::ContinuationControl*) override;
virtual void visit(const AST::DynamicEvaluate*) override;
virtual void visit(const AST::DoubleQuotedString*) override;
virtual void visit(const AST::Fd2FdRedirection*) override;
virtual void visit(const AST::FunctionDeclaration*) override;
virtual void visit(const AST::ForLoop*) override;
virtual void visit(const AST::Glob*) override;
virtual void visit(const AST::HistoryEvent*) override;
virtual void visit(const AST::Execute*) override;
virtual void visit(const AST::IfCond*) override;
virtual void visit(const AST::ImmediateExpression*) override;
virtual void visit(const AST::Join*) override;
virtual void visit(const AST::MatchExpr*) override;
virtual void visit(const AST::Or*) override;
virtual void visit(const AST::Pipe*) override;
virtual void visit(const AST::Range*) override;
virtual void visit(const AST::ReadRedirection*) override;
virtual void visit(const AST::ReadWriteRedirection*) override;
virtual void visit(const AST::Sequence*) override;
virtual void visit(const AST::Subshell*) override;
virtual void visit(const AST::SimpleVariable*) override;
virtual void visit(const AST::SpecialVariable*) override;
virtual void visit(const AST::Juxtaposition*) override;
virtual void visit(const AST::StringLiteral*) override;
virtual void visit(const AST::StringPartCompose*) override;
virtual void visit(const AST::SyntaxError*) override;
virtual void visit(const AST::Tilde*) override;
virtual void visit(const AST::VariableDeclarations*) override;
virtual void visit(const AST::WriteAppendRedirection*) override;
virtual void visit(const AST::WriteRedirection*) override;
void test_and_update_output_cursor(const AST::Node*);
void visited(const AST::Node*);
void will_visit(const AST::Node*);
void insert_separator();
void insert_indent();
ALWAYS_INLINE void with_added_indent(int indent, Function<void()>);
ALWAYS_INLINE void in_new_block(Function<void()>);
StringBuilder& current_builder() { return m_builder; }
struct Options {
size_t max_line_length_hint { 80 };
bool explicit_parentheses { false };
bool explicit_braces { false };
bool in_double_quotes { false };
} m_options;
size_t m_current_indent { 0 };
StringBuilder m_builder;
StringView m_source;
size_t m_output_cursor { 0 };
ssize_t m_cursor { -1 };
RefPtr<AST::Node> m_root_node;
AST::Node* m_hit_node { nullptr };
const AST::Node* m_parent_node { nullptr };
const AST::Node* m_last_visited_node { nullptr };
StringView m_trivia;
};
}
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