mirror of
https://github.com/LadybirdBrowser/ladybird.git
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5d180d1f99
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
818 lines
22 KiB
C++
818 lines
22 KiB
C++
/*
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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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#include "Formatter.h"
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#include "AST.h"
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#include "Parser.h"
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#include <AK/TemporaryChange.h>
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namespace Shell {
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String Formatter::format()
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{
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auto node = Parser(m_source).parse();
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if (m_cursor >= 0)
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m_output_cursor = m_cursor;
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if (!node)
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return String();
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if (node->is_syntax_error())
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return m_source;
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if (m_cursor >= 0) {
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auto hit_test = node->hit_test_position(m_cursor);
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if (hit_test.matching_node)
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m_hit_node = hit_test.matching_node.ptr();
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else
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m_hit_node = nullptr;
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}
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m_parent_node = nullptr;
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node->visit(*this);
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auto string = m_builder.string_view();
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if (!string.ends_with(" "))
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m_builder.append(m_trivia);
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return m_builder.to_string();
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}
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void Formatter::with_added_indent(int indent, Function<void()> callback)
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{
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TemporaryChange indent_change { m_current_indent, m_current_indent + indent };
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callback();
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}
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void Formatter::in_new_block(Function<void()> callback)
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{
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current_builder().append('{');
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with_added_indent(1, [&] {
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insert_separator();
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callback();
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});
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insert_separator();
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current_builder().append('}');
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}
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void Formatter::test_and_update_output_cursor(const AST::Node* node)
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{
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if (!node)
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return;
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if (node != m_hit_node)
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return;
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m_output_cursor = current_builder().length() + m_cursor - node->position().start_offset;
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}
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void Formatter::visited(const AST::Node* node)
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{
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m_last_visited_node = node;
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}
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void Formatter::will_visit(const AST::Node* node)
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{
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if (!m_last_visited_node)
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return;
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if (!node)
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return;
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auto direct_sequence_child = !m_parent_node || m_parent_node->kind() == AST::Node::Kind::Sequence;
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if (direct_sequence_child && node->kind() != AST::Node::Kind::Sequence) {
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// Collapse more than one empty line to a single one.
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if (node->position().start_line.line_number - m_last_visited_node->position().end_line.line_number > 1)
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current_builder().append('\n');
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}
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}
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void Formatter::insert_separator()
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{
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current_builder().append('\n');
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insert_indent();
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}
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void Formatter::insert_indent()
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{
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for (size_t i = 0; i < m_current_indent; ++i)
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current_builder().append(" ");
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}
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void Formatter::visit(const AST::PathRedirectionNode* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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NodeVisitor::visit(node);
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visited(node);
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}
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void Formatter::visit(const AST::And* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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auto should_indent = m_parent_node && m_parent_node->kind() != AST::Node::Kind::And;
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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with_added_indent(should_indent ? 1 : 0, [&] {
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node->left()->visit(*this);
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current_builder().append(" \\");
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insert_separator();
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current_builder().append("&& ");
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node->right()->visit(*this);
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});
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visited(node);
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}
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void Formatter::visit(const AST::ListConcatenate* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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auto first = true;
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for (auto& subnode : node->list()) {
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if (!first)
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current_builder().append(' ');
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first = false;
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subnode->visit(*this);
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}
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visited(node);
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}
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void Formatter::visit(const AST::Background* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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NodeVisitor::visit(node);
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current_builder().append(" &");
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visited(node);
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}
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void Formatter::visit(const AST::BarewordLiteral* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append(node->text());
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visited(node);
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}
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void Formatter::visit(const AST::BraceExpansion* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append('{');
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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bool first = true;
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for (auto& entry : node->entries()) {
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if (!first)
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current_builder().append(',');
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first = false;
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entry.visit(*this);
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}
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current_builder().append('}');
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visited(node);
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}
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void Formatter::visit(const AST::CastToCommand* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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if (m_options.explicit_parentheses)
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current_builder().append('(');
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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NodeVisitor::visit(node);
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if (m_options.explicit_parentheses)
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current_builder().append(')');
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visited(node);
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}
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void Formatter::visit(const AST::CastToList* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append('(');
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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NodeVisitor::visit(node);
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current_builder().append(')');
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visited(node);
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}
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void Formatter::visit(const AST::CloseFdRedirection* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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current_builder().appendf(" %d>&-", node->fd());
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visited(node);
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}
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void Formatter::visit(const AST::CommandLiteral*)
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{
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VERIFY_NOT_REACHED();
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}
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void Formatter::visit(const AST::Comment* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append("#");
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current_builder().append(node->text());
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visited(node);
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}
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void Formatter::visit(const AST::ContinuationControl* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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if (node->continuation_kind() == AST::ContinuationControl::Break)
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current_builder().append("break");
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else if (node->continuation_kind() == AST::ContinuationControl::Continue)
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current_builder().append("continue");
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else
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VERIFY_NOT_REACHED();
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visited(node);
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}
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void Formatter::visit(const AST::DynamicEvaluate* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append('$');
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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NodeVisitor::visit(node);
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visited(node);
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}
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void Formatter::visit(const AST::DoubleQuotedString* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append("\"");
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TemporaryChange quotes { m_options.in_double_quotes, true };
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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NodeVisitor::visit(node);
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current_builder().append("\"");
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visited(node);
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}
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void Formatter::visit(const AST::Fd2FdRedirection* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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current_builder().appendf(" %d>&%d", node->source_fd(), node->dest_fd());
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if (m_hit_node == node)
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++m_output_cursor;
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visited(node);
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}
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void Formatter::visit(const AST::FunctionDeclaration* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append(node->name().name);
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current_builder().append('(');
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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auto first = true;
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for (auto& arg : node->arguments()) {
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if (!first)
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current_builder().append(' ');
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first = false;
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current_builder().append(arg.name);
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}
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current_builder().append(") ");
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in_new_block([&] {
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if (node->block())
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node->block()->visit(*this);
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});
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visited(node);
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}
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void Formatter::visit(const AST::ForLoop* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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auto is_loop = node->iterated_expression().is_null();
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current_builder().append(is_loop ? "loop" : "for ");
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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if (!is_loop) {
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if (node->variable_name() != "it") {
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current_builder().append(node->variable_name());
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current_builder().append(" in ");
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}
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node->iterated_expression()->visit(*this);
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}
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current_builder().append(' ');
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in_new_block([&] {
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if (node->block())
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node->block()->visit(*this);
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});
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visited(node);
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}
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void Formatter::visit(const AST::Glob* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append(node->text());
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visited(node);
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}
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void Formatter::visit(const AST::HistoryEvent* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append('!');
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switch (node->selector().event.kind) {
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case AST::HistorySelector::EventKind::ContainingStringLookup:
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current_builder().append('?');
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current_builder().append(node->selector().event.text);
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break;
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case AST::HistorySelector::EventKind::StartingStringLookup:
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current_builder().append(node->selector().event.text);
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break;
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case AST::HistorySelector::EventKind::IndexFromStart:
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current_builder().append(node->selector().event.text);
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break;
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case AST::HistorySelector::EventKind::IndexFromEnd:
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if (node->selector().event.index == 0)
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current_builder().append('!');
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else
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current_builder().append(node->selector().event.text);
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break;
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}
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auto& range = node->selector().word_selector_range;
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if (!range.end.has_value()
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|| range.end.value().kind != AST::HistorySelector::WordSelectorKind::Last
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|| range.start.kind != AST::HistorySelector::WordSelectorKind::Index || range.start.selector != 0) {
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auto append_word = [this](auto& selector) {
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switch (selector.kind) {
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case AST::HistorySelector::WordSelectorKind::Index:
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if (selector.selector == 0)
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current_builder().append('^');
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else
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current_builder().appendff("{}", selector.selector);
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break;
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case AST::HistorySelector::WordSelectorKind::Last:
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current_builder().append('$');
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break;
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}
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};
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current_builder().append(':');
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append_word(range.start);
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if (range.end.has_value()) {
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current_builder().append('-');
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append_word(range.end.value());
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}
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}
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visited(node);
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}
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void Formatter::visit(const AST::Execute* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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auto& builder = current_builder();
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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ScopedValueRollback options_rollback { m_options };
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if (node->does_capture_stdout()) {
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builder.append("$");
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m_options.explicit_parentheses = true;
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}
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NodeVisitor::visit(node);
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visited(node);
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}
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void Formatter::visit(const AST::IfCond* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append("if ");
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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node->condition()->visit(*this);
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current_builder().append(' ');
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in_new_block([&] {
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if (node->true_branch())
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node->true_branch()->visit(*this);
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});
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if (node->false_branch()) {
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current_builder().append(" else ");
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if (node->false_branch()->kind() != AST::Node::Kind::IfCond) {
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in_new_block([&] {
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node->false_branch()->visit(*this);
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});
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} else {
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node->false_branch()->visit(*this);
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}
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} else if (node->else_position().has_value()) {
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current_builder().append(" else ");
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}
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visited(node);
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}
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void Formatter::visit(const AST::Join* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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auto should_parenthesise = m_options.explicit_parentheses;
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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TemporaryChange parens { m_options.explicit_parentheses, false };
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if (should_parenthesise)
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current_builder().append('(');
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NodeVisitor::visit(node);
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if (should_parenthesise)
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current_builder().append(')');
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visited(node);
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}
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void Formatter::visit(const AST::MatchExpr* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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current_builder().append("match ");
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TemporaryChange<const AST::Node*> parent { m_parent_node, node };
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node->matched_expr()->visit(*this);
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if (!node->expr_name().is_empty()) {
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current_builder().append(" as ");
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current_builder().append(node->expr_name());
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}
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current_builder().append(' ');
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in_new_block([&] {
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auto first_entry = true;
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for (auto& entry : node->entries()) {
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if (!first_entry)
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insert_separator();
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first_entry = false;
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auto first = true;
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for (auto& option : entry.options) {
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if (!first)
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current_builder().append(" | ");
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first = false;
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option.visit(*this);
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}
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current_builder().append(' ');
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if (entry.match_names.has_value() && !entry.match_names.value().is_empty()) {
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current_builder().append("as (");
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auto first = true;
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for (auto& name : entry.match_names.value()) {
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if (!first)
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current_builder().append(' ');
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first = false;
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current_builder().append(name);
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}
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current_builder().append(") ");
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}
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in_new_block([&] {
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if (entry.body)
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entry.body->visit(*this);
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});
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}
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});
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visited(node);
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}
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void Formatter::visit(const AST::Or* node)
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{
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will_visit(node);
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test_and_update_output_cursor(node);
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auto should_indent = m_parent_node && m_parent_node->kind() != AST::Node::Kind::Or;
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|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
with_added_indent(should_indent ? 1 : 0, [&] {
|
|
node->left()->visit(*this);
|
|
|
|
current_builder().append(" \\");
|
|
insert_separator();
|
|
current_builder().append("|| ");
|
|
|
|
node->right()->visit(*this);
|
|
});
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::Pipe* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
auto should_indent = m_parent_node && m_parent_node->kind() != AST::Node::Kind::Pipe;
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
node->left()->visit(*this);
|
|
current_builder().append(" \\");
|
|
|
|
with_added_indent(should_indent ? 1 : 0, [&] {
|
|
insert_separator();
|
|
current_builder().append("| ");
|
|
|
|
node->right()->visit(*this);
|
|
});
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::Range* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
current_builder().append('{');
|
|
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
node->start()->visit(*this);
|
|
current_builder().append("..");
|
|
node->end()->visit(*this);
|
|
|
|
current_builder().append('}');
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::ReadRedirection* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
if (node->fd() != 0)
|
|
current_builder().appendf(" %d<", node->fd());
|
|
else
|
|
current_builder().append(" <");
|
|
NodeVisitor::visit(node);
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::ReadWriteRedirection* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
if (node->fd() != 0)
|
|
current_builder().appendf(" %d<>", node->fd());
|
|
else
|
|
current_builder().append(" <>");
|
|
NodeVisitor::visit(node);
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::Sequence* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
bool first = true;
|
|
for (auto& entry : node->entries()) {
|
|
if (first)
|
|
first = false;
|
|
else
|
|
insert_separator();
|
|
|
|
entry.visit(*this);
|
|
}
|
|
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::Subshell* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
in_new_block([&] {
|
|
insert_separator();
|
|
NodeVisitor::visit(node);
|
|
insert_separator();
|
|
});
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::SimpleVariable* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
current_builder().append('$');
|
|
current_builder().append(node->name());
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::SpecialVariable* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
current_builder().append('$');
|
|
current_builder().append(node->name());
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::Juxtaposition* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
NodeVisitor::visit(node);
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::StringLiteral* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
if (!m_options.in_double_quotes)
|
|
current_builder().append("'");
|
|
|
|
if (m_options.in_double_quotes) {
|
|
for (auto ch : node->text()) {
|
|
switch (ch) {
|
|
case '"':
|
|
case '\\':
|
|
case '$':
|
|
current_builder().append('\\');
|
|
break;
|
|
case '\n':
|
|
current_builder().append("\\n");
|
|
continue;
|
|
case '\r':
|
|
current_builder().append("\\r");
|
|
continue;
|
|
case '\t':
|
|
current_builder().append("\\t");
|
|
continue;
|
|
case '\v':
|
|
current_builder().append("\\v");
|
|
continue;
|
|
case '\f':
|
|
current_builder().append("\\f");
|
|
continue;
|
|
case '\a':
|
|
current_builder().append("\\a");
|
|
continue;
|
|
case '\e':
|
|
current_builder().append("\\e");
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
current_builder().append(ch);
|
|
}
|
|
} else {
|
|
current_builder().append(node->text());
|
|
}
|
|
|
|
if (!m_options.in_double_quotes)
|
|
current_builder().append("'");
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::StringPartCompose* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
NodeVisitor::visit(node);
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::SyntaxError* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
NodeVisitor::visit(node);
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::Tilde* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
current_builder().append(node->text());
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::VariableDeclarations* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
auto first = true;
|
|
for (auto& entry : node->variables()) {
|
|
if (!first)
|
|
current_builder().append(' ');
|
|
first = false;
|
|
entry.name->visit(*this);
|
|
current_builder().append('=');
|
|
|
|
if (entry.value->is_command())
|
|
current_builder().append('(');
|
|
|
|
entry.value->visit(*this);
|
|
|
|
if (entry.value->is_command())
|
|
current_builder().append(')');
|
|
}
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::WriteAppendRedirection* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
if (node->fd() != 1)
|
|
current_builder().appendf(" %d>>", node->fd());
|
|
else
|
|
current_builder().append(" >>");
|
|
NodeVisitor::visit(node);
|
|
visited(node);
|
|
}
|
|
|
|
void Formatter::visit(const AST::WriteRedirection* node)
|
|
{
|
|
will_visit(node);
|
|
test_and_update_output_cursor(node);
|
|
TemporaryChange<const AST::Node*> parent { m_parent_node, node };
|
|
|
|
if (node->fd() != 1)
|
|
current_builder().appendf(" %d>", node->fd());
|
|
else
|
|
current_builder().append(" >");
|
|
NodeVisitor::visit(node);
|
|
visited(node);
|
|
}
|
|
|
|
}
|