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https://github.com/open-goal/jak-project.git
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167 lines
6.4 KiB
C++
167 lines
6.4 KiB
C++
#include "formatter.h"
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#include "formatter_tree.h"
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#include "common/log/log.h"
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#include "common/util/FileUtil.h"
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#include "common/util/string_util.h"
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#include "tree_sitter/api.h"
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#include "third-party/fmt/core.h"
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// Declare the `tree_sitter_opengoal` function, which is
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// implemented by the `tree-sitter-opengoal` library.
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extern "C" {
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extern const TSLanguage* tree_sitter_opengoal();
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}
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std::string apply_formatting(
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const FormatterTreeNode& curr_node,
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std::string output,
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std::optional<formatter_rules::config::FormFormattingConfig> form_element_config) {
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using namespace formatter_rules;
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if (!curr_node.token && curr_node.refs.empty()) {
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return output;
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}
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std::string curr_form = "";
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// Print the token
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if (curr_node.token) {
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curr_form += curr_node.token.value();
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return curr_form;
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}
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if (!curr_node.metadata.is_top_level) {
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curr_form += "(";
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}
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// Iterate the form
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bool inline_form = false;
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// Also check if the form should be constant-paired
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const bool constant_pair_form = constant_pairs::form_should_be_constant_paired(curr_node);
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if (!constant_pair_form) {
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// Determine if the form should be inlined or hung/flowed
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// TODO - this isn't entirely accurate, needs current cursor positioning (which is tricky
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// because recursion!)
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inline_form = indent::form_can_be_inlined(curr_form, curr_node);
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}
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const bool flowing = indent::should_form_flow(curr_node, inline_form);
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std::optional<formatter_rules::config::FormFormattingConfig> form_config;
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if (!curr_node.refs.empty() && curr_node.refs.at(0).token) {
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const auto& form_head = curr_node.refs.at(0).token;
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if (form_head && config::opengoal_form_config.find(form_head.value()) !=
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config::opengoal_form_config.end()) {
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form_config = config::opengoal_form_config.at(form_head.value());
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}
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}
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// TODO - might want to make some kind of per-form config struct, simplify the passing around of
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// info below
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for (int i = 0; i < curr_node.refs.size(); i++) {
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const auto& ref = curr_node.refs.at(i);
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// Figure out if the element should be inlined or not
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bool inline_element = inline_form;
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if (indent::inline_form_element(curr_node, i)) {
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inline_element = indent::inline_form_element(curr_node, i).value();
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}
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// Append a newline if needed
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// TODO - cleanup / move
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bool is_binding_list = false;
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bool force_newline = false;
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bool override_force_flow = false;
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if (form_config) {
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force_newline = std::find(form_config->force_newline_at_indices.begin(),
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form_config->force_newline_at_indices.end(),
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i) != form_config->force_newline_at_indices.end();
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// Check if it's a small enough binding list, if so we don't force a newline if the element
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// can be inlined
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if (inline_element && i > 0 && form_config->bindings_at_index == i - 1 &&
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curr_node.refs.at(i - 1).refs.size() < form_config->allow_inlining_if_size_less_than) {
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force_newline = false;
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override_force_flow = true;
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}
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is_binding_list = form_config->bindings_at_index == i;
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}
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if (!curr_node.metadata.is_top_level &&
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(!inline_element || is_binding_list || force_newline ||
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(form_element_config && form_element_config->force_flow))) {
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indent::append_newline(curr_form, ref, curr_node, i, flowing, constant_pair_form,
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(form_element_config && form_element_config->force_flow));
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}
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// TODO - indent the line (or don't)
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// Either print the element's token, or recursively format it as well
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if (ref.token) {
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// TODO depth hard-coded to 1, i think this can be removed, since
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// forms are always done bottom-top recursively, they always act
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// independently as if it was the shallowest depth
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if (!inline_element || force_newline) {
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indent::indent_line(curr_form, ref, curr_node, 1, i, flowing);
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}
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if (ref.metadata.node_type == "comment" && ref.metadata.is_inline) {
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curr_form += " " + ref.token.value();
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} else if (ref.metadata.node_type == "block_comment") {
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curr_form += comments::format_block_comment(ref.token.value());
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} else {
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curr_form += ref.token.value();
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}
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if (!curr_node.metadata.is_top_level) {
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curr_form += " ";
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}
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} else {
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// See if the item at this position has specific formatting
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std::optional<formatter_rules::config::FormFormattingConfig> config = {};
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std::string formatted_form;
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if (form_config && form_config->index_configs.find(i) != form_config->index_configs.end()) {
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formatted_form = apply_formatting(ref, "", *form_config->index_configs.at(i));
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} else {
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formatted_form = apply_formatting(ref, "", {});
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}
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// TODO - align inner lines only
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if (!curr_node.metadata.is_top_level) {
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indent::align_lines(
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formatted_form, ref, curr_node, constant_pair_form, flowing,
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(!override_force_flow && form_config && i >= form_config->start_flow_at_index),
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inline_element);
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}
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curr_form += formatted_form;
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if (!curr_node.metadata.is_top_level) {
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curr_form += " ";
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}
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}
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// Handle blank lines at the top level, skip if it's the final element
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blank_lines::separate_by_newline(curr_form, curr_node, ref, i);
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}
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if (!curr_node.metadata.is_top_level) {
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curr_form = str_util::rtrim(curr_form) + ")";
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}
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return curr_form;
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}
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std::optional<std::string> formatter::format_code(const std::string& source) {
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// Create a parser.
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std::shared_ptr<TSParser> parser(ts_parser_new(), TreeSitterParserDeleter());
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// Set the parser's language (JSON in this case).
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ts_parser_set_language(parser.get(), tree_sitter_opengoal());
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// Build a syntax tree based on source code stored in a string.
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std::shared_ptr<TSTree> tree(
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ts_parser_parse_string(parser.get(), NULL, source.c_str(), source.length()),
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TreeSitterTreeDeleter());
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// Get the root node of the syntax tree.
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TSNode root_node = ts_tree_root_node(tree.get());
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if (ts_node_is_null(root_node) || ts_node_has_error(root_node)) {
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return std::nullopt;
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}
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try {
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const auto formatting_tree = FormatterTree(source, root_node);
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std::string formatted_code = apply_formatting(formatting_tree.root, "", {});
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return formatted_code;
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} catch (std::exception& e) {
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lg::error("Unable to format code - {}", e.what());
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}
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return std::nullopt;
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}
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