diff --git a/DevTools/HackStudio/CMakeLists.txt b/DevTools/HackStudio/CMakeLists.txt index 7b2b28b1f2..684de9fdf5 100644 --- a/DevTools/HackStudio/CMakeLists.txt +++ b/DevTools/HackStudio/CMakeLists.txt @@ -1,5 +1,6 @@ set(SOURCES CodeDocument.cpp + CppAutoComplete.cpp CursorTool.cpp Debugger/BacktraceModel.cpp Debugger/DebugInfoWidget.cpp diff --git a/DevTools/HackStudio/CppAutoComplete.cpp b/DevTools/HackStudio/CppAutoComplete.cpp new file mode 100644 index 0000000000..1a7762cee2 --- /dev/null +++ b/DevTools/HackStudio/CppAutoComplete.cpp @@ -0,0 +1,92 @@ +/* + * Copyright (c) 2020, Itamar S. + * 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. + */ + +#include "CppAutoComplete.h" +#include +#include + +// #define DEBUG_AUTOCOMPLETE + +namespace HackStudio { +Vector CppAutoComplete::get_suggestions(const String& code, GUI::TextPosition autocomplete_position) +{ + auto lines = code.split('\n', true); + GUI::CppLexer lexer(code); + auto tokens = lexer.lex(); + + auto index_of_target_token = token_in_position(tokens, autocomplete_position); + if (!index_of_target_token.has_value()) + return {}; + + auto suggestions = identifier_prefixes(lines, tokens, index_of_target_token.value()); + +#ifdef DEBUG_AUTOCOMPLETE + for (auto& suggestion : suggestions) { + dbg() << "suggestion: " << suggestion; + } +#endif + + return suggestions; +} + +String CppAutoComplete::text_of_token(const Vector lines, const GUI::CppToken& token) +{ + return lines[token.m_start.line].substring(token.m_start.column, token.m_end.column - token.m_start.column + 1); +} + +Optional CppAutoComplete::token_in_position(const Vector& tokens, GUI::TextPosition position) +{ + for (size_t token_index = 0; token_index < tokens.size(); ++token_index) { + auto& token = tokens[token_index]; + if (token.m_start.line != position.line()) + continue; + if (token.m_start.column > position.column() || token.m_end.column < position.column()) + continue; + return token_index; + } + return {}; +} + +Vector CppAutoComplete::identifier_prefixes(const Vector lines, const Vector& tokens, size_t target_token_index) +{ + auto partial_input = text_of_token(lines, tokens[target_token_index]); + Vector suggestions; + + HashTable suggestions_lookup; // To avoid duplicate results + + for (size_t i = 0; i < target_token_index; ++i) { + auto& token = tokens[i]; + if (token.m_type != GUI::CppToken::Type::Identifier) + continue; + auto text = text_of_token(lines, token); + if (text.starts_with(partial_input) && !suggestions_lookup.contains(text)) { + suggestions_lookup.set(text); + suggestions.append(text); + } + } + return suggestions; +} +}; diff --git a/DevTools/HackStudio/CppAutoComplete.h b/DevTools/HackStudio/CppAutoComplete.h new file mode 100644 index 0000000000..9c4bbb3233 --- /dev/null +++ b/DevTools/HackStudio/CppAutoComplete.h @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2020, Itamar S. + * 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 +#include +#include +#include + +namespace HackStudio { +class CppAutoComplete { +public: + CppAutoComplete() = delete; + + static Vector get_suggestions(const String& code, GUI::TextPosition autocomplete_position); + +private: + static Optional token_in_position(const Vector&, GUI::TextPosition); + static String text_of_token(const Vector lines, const GUI::CppToken&); + static Vector identifier_prefixes(const Vector lines, const Vector&, size_t target_token_index); +}; +};