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Shell: Add a (very basic) formatter
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10 changed files with 1198 additions and 3 deletions
121
Shell/Formatter.h
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121
Shell/Formatter.h
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/*
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* Copyright (c) 2020, the SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "NodeVisitor.h"
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#include <AK/Forward.h>
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#include <AK/StringBuilder.h>
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#include <AK/StringView.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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#include <ctype.h>
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class Formatter final : public AST::NodeVisitor {
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public:
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Formatter(const StringView& source, ssize_t cursor = -1)
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: m_builder(round_up_to_power_of_two(source.length(), 16))
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, m_source(source)
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, m_cursor(cursor)
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{
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size_t offset = 0;
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for (auto ptr = m_source.end() - 1; ptr >= m_source.begin() && isspace(*ptr); --ptr)
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++offset;
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m_trivia = m_source.substring_view(m_source.length() - offset, offset);
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}
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String format();
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size_t cursor() const { return m_output_cursor; }
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private:
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virtual void visit(const AST::PathRedirectionNode*) override;
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virtual void visit(const AST::And*) override;
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virtual void visit(const AST::ListConcatenate*) override;
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virtual void visit(const AST::Background*) override;
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virtual void visit(const AST::BarewordLiteral*) override;
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virtual void visit(const AST::CastToCommand*) override;
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virtual void visit(const AST::CastToList*) override;
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virtual void visit(const AST::CloseFdRedirection*) override;
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virtual void visit(const AST::CommandLiteral*) override;
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virtual void visit(const AST::Comment*) override;
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virtual void visit(const AST::DynamicEvaluate*) override;
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virtual void visit(const AST::DoubleQuotedString*) override;
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virtual void visit(const AST::Fd2FdRedirection*) override;
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virtual void visit(const AST::FunctionDeclaration*) override;
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virtual void visit(const AST::ForLoop*) override;
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virtual void visit(const AST::Glob*) override;
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virtual void visit(const AST::Execute*) override;
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virtual void visit(const AST::IfCond*) override;
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virtual void visit(const AST::Join*) override;
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virtual void visit(const AST::MatchExpr*) override;
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virtual void visit(const AST::Or*) override;
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virtual void visit(const AST::Pipe*) override;
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virtual void visit(const AST::ReadRedirection*) override;
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virtual void visit(const AST::ReadWriteRedirection*) override;
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virtual void visit(const AST::Sequence*) override;
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virtual void visit(const AST::Subshell*) override;
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virtual void visit(const AST::SimpleVariable*) override;
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virtual void visit(const AST::SpecialVariable*) override;
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virtual void visit(const AST::Juxtaposition*) override;
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virtual void visit(const AST::StringLiteral*) override;
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virtual void visit(const AST::StringPartCompose*) override;
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virtual void visit(const AST::SyntaxError*) override;
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virtual void visit(const AST::Tilde*) override;
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virtual void visit(const AST::VariableDeclarations*) override;
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virtual void visit(const AST::WriteAppendRedirection*) override;
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virtual void visit(const AST::WriteRedirection*) override;
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void test_and_update_output_cursor(const AST::Node*);
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void insert_separator();
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void insert_indent();
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ALWAYS_INLINE void with_added_indent(int indent, Function<void()>);
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ALWAYS_INLINE void in_new_block(Function<void()>);
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StringBuilder& current_builder() { return m_builder; }
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struct Options {
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size_t max_line_length_hint { 80 };
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bool explicit_parentheses { false };
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bool explicit_braces { false };
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bool in_double_quotes { false };
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} m_options;
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size_t m_current_line_length { 0 };
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size_t m_current_indent { 0 };
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StringBuilder m_builder;
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StringView m_source;
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size_t m_output_cursor { 0 };
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ssize_t m_cursor { -1 };
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AST::Node* m_hit_node { nullptr };
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const AST::Node* m_parent_node { nullptr };
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StringView m_trivia;
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};
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