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LibGUI+HackStudio: Move syntax highlighting from HackStudio to LibGUI
This patch introduces the GUI::SyntaxHighlighter class, which can be attached to a GUI::TextEditor to provide syntax highlighting. The C++ syntax highlighting from HackStudio becomes a new class called GUI::CppSyntaxHighlighter. This will make it possible to get C++ syntax highlighting in any app that uses a GUI::TextEditor. :^) Sidenote: It does feel a bit weird having a C++ lexer in a GUI toolkit library, and we'll probably end up moving this out to a separate place as this functionality grows larger.
This commit is contained in:
Andreas Kling
parent
6cf49c23d4
commit
bb8e65be41
13 changed files with 277 additions and 170 deletions
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@ -1,370 +0,0 @@
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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 "CppLexer.h"
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#include <AK/HashTable.h>
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#include <AK/String.h>
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#include <ctype.h>
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CppLexer::CppLexer(const StringView& input)
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: m_input(input)
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{
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}
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char CppLexer::peek(size_t offset) const
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{
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if ((m_index + offset) >= m_input.length())
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return 0;
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return m_input[m_index + offset];
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}
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char CppLexer::consume()
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{
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ASSERT(m_index < m_input.length());
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char ch = m_input[m_index++];
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m_previous_position = m_position;
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if (ch == '\n') {
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m_position.line++;
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m_position.column = 0;
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} else {
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m_position.column++;
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}
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return ch;
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}
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static bool is_valid_first_character_of_identifier(char ch)
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{
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return isalpha(ch) || ch == '_' || ch == '$';
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}
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static bool is_valid_nonfirst_character_of_identifier(char ch)
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{
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return is_valid_first_character_of_identifier(ch) || isdigit(ch);
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}
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static bool is_keyword(const StringView& string)
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{
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static HashTable<String> keywords;
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if (keywords.is_empty()) {
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keywords.set("alignas");
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keywords.set("alignof");
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keywords.set("and");
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keywords.set("and_eq");
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keywords.set("asm");
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keywords.set("bitand");
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keywords.set("bitor");
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keywords.set("bool");
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keywords.set("break");
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keywords.set("case");
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keywords.set("catch");
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keywords.set("class");
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keywords.set("compl");
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keywords.set("const");
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keywords.set("const_cast");
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keywords.set("constexpr");
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keywords.set("continue");
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keywords.set("decltype");
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keywords.set("default");
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keywords.set("delete");
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keywords.set("do");
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keywords.set("dynamic_cast");
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keywords.set("else");
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keywords.set("enum");
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keywords.set("explicit");
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keywords.set("export");
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keywords.set("extern");
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keywords.set("false");
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keywords.set("final");
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keywords.set("for");
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keywords.set("friend");
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keywords.set("goto");
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keywords.set("if");
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keywords.set("inline");
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keywords.set("mutable");
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keywords.set("namespace");
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keywords.set("new");
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keywords.set("noexcept");
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keywords.set("not");
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keywords.set("not_eq");
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keywords.set("nullptr");
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keywords.set("operator");
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keywords.set("or");
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keywords.set("or_eq");
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keywords.set("override");
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keywords.set("private");
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keywords.set("protected");
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keywords.set("public");
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keywords.set("register");
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keywords.set("reinterpret_cast");
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keywords.set("return");
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keywords.set("signed");
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keywords.set("sizeof");
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keywords.set("static");
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keywords.set("static_assert");
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keywords.set("static_cast");
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keywords.set("struct");
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keywords.set("switch");
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keywords.set("template");
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keywords.set("this");
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keywords.set("thread_local");
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keywords.set("throw");
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keywords.set("true");
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keywords.set("try");
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keywords.set("typedef");
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keywords.set("typeid");
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keywords.set("typename");
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keywords.set("union");
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keywords.set("using");
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keywords.set("virtual");
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keywords.set("volatile");
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keywords.set("while");
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keywords.set("xor");
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keywords.set("xor_eq");
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}
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return keywords.contains(string);
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}
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static bool is_known_type(const StringView& string)
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{
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static HashTable<String> types;
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if (types.is_empty()) {
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types.set("ByteBuffer");
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types.set("CircularDeque");
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types.set("CircularQueue");
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types.set("Deque");
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types.set("DoublyLinkedList");
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types.set("FileSystemPath");
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types.set("FixedArray");
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types.set("Function");
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types.set("HashMap");
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types.set("HashTable");
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types.set("IPv4Address");
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types.set("InlineLinkedList");
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types.set("IntrusiveList");
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types.set("JsonArray");
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types.set("JsonObject");
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types.set("JsonValue");
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types.set("MappedFile");
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types.set("NetworkOrdered");
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types.set("NonnullOwnPtr");
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types.set("NonnullOwnPtrVector");
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types.set("NonnullRefPtr");
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types.set("NonnullRefPtrVector");
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types.set("Optional");
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types.set("OwnPtr");
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types.set("RefPtr");
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types.set("Result");
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types.set("ScopeGuard");
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types.set("SinglyLinkedList");
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types.set("String");
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types.set("StringBuilder");
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types.set("StringImpl");
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types.set("StringView");
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types.set("Utf8View");
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types.set("Vector");
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types.set("WeakPtr");
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types.set("auto");
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types.set("char");
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types.set("char16_t");
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types.set("char32_t");
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types.set("char8_t");
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types.set("double");
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types.set("float");
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types.set("i16");
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types.set("i32");
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types.set("i64");
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types.set("i8");
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types.set("int");
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types.set("int");
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types.set("long");
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types.set("short");
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types.set("signed");
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types.set("u16");
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types.set("u32");
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types.set("u64");
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types.set("u8");
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types.set("unsigned");
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types.set("void");
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types.set("wchar_t");
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}
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return types.contains(string);
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}
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Vector<CppToken> CppLexer::lex()
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{
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Vector<CppToken> tokens;
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size_t token_start_index = 0;
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CppPosition token_start_position;
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auto emit_token = [&](auto type) {
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CppToken token;
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token.m_type = type;
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token.m_start = m_position;
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token.m_end = m_position;
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tokens.append(token);
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consume();
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};
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auto begin_token = [&] {
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token_start_index = m_index;
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token_start_position = m_position;
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};
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auto commit_token = [&](auto type) {
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CppToken token;
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token.m_type = type;
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token.m_start = token_start_position;
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token.m_end = m_previous_position;
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tokens.append(token);
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};
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while (m_index < m_input.length()) {
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auto ch = peek();
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if (isspace(ch)) {
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begin_token();
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while (isspace(peek()))
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consume();
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commit_token(CppToken::Type::Whitespace);
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continue;
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}
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if (ch == '(') {
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emit_token(CppToken::Type::LeftParen);
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continue;
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}
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if (ch == ')') {
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emit_token(CppToken::Type::RightParen);
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continue;
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}
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if (ch == '{') {
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emit_token(CppToken::Type::LeftCurly);
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continue;
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}
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if (ch == '}') {
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emit_token(CppToken::Type::RightCurly);
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continue;
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}
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if (ch == '[') {
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emit_token(CppToken::Type::LeftBracket);
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continue;
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}
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if (ch == ']') {
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emit_token(CppToken::Type::RightBracket);
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continue;
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}
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if (ch == ',') {
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emit_token(CppToken::Type::Comma);
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continue;
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}
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if (ch == '*') {
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emit_token(CppToken::Type::Asterisk);
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continue;
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}
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if (ch == ';') {
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emit_token(CppToken::Type::Semicolon);
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continue;
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}
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if (ch == '#') {
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begin_token();
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while (peek() && peek() != '\n')
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consume();
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commit_token(CppToken::Type::PreprocessorStatement);
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continue;
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}
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if (ch == '/' && peek(1) == '/') {
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begin_token();
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while (peek() && peek() != '\n')
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consume();
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commit_token(CppToken::Type::Comment);
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continue;
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}
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if (ch == '/' && peek(1) == '*') {
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begin_token();
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consume();
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consume();
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bool comment_block_ends = false;
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while (peek()) {
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if (peek() == '*' && peek(1) == '/') {
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comment_block_ends = true;
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break;
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}
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consume();
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}
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if (comment_block_ends) {
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consume();
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consume();
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}
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commit_token(CppToken::Type::Comment);
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continue;
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}
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if (ch == '"') {
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begin_token();
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consume();
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while (peek()) {
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if (consume() == '"')
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break;
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}
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commit_token(CppToken::Type::DoubleQuotedString);
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continue;
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}
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if (ch == '\'') {
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begin_token();
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consume();
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while (peek()) {
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if (consume() == '\'')
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break;
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}
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commit_token(CppToken::Type::SingleQuotedString);
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continue;
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}
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if (isdigit(ch)) {
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begin_token();
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while (peek() && isdigit(peek())) {
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consume();
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}
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commit_token(CppToken::Type::Number);
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continue;
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}
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if (is_valid_first_character_of_identifier(ch)) {
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begin_token();
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while (peek() && is_valid_nonfirst_character_of_identifier(peek()))
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consume();
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auto token_view = StringView(m_input.characters_without_null_termination() + token_start_index, m_index - token_start_index);
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if (is_keyword(token_view))
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commit_token(CppToken::Type::Keyword);
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else if (is_known_type(token_view))
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commit_token(CppToken::Type::KnownType);
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else
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commit_token(CppToken::Type::Identifier);
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continue;
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}
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dbg() << "Unimplemented token character: " << ch;
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emit_token(CppToken::Type::Unknown);
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}
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return tokens;
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}
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@ -1,96 +0,0 @@
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
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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
|
||||
* 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
|
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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 <AK/StringView.h>
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#include <AK/Vector.h>
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#define FOR_EACH_TOKEN_TYPE \
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__TOKEN(Unknown) \
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__TOKEN(Whitespace) \
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__TOKEN(PreprocessorStatement) \
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__TOKEN(LeftParen) \
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__TOKEN(RightParen) \
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__TOKEN(LeftCurly) \
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__TOKEN(RightCurly) \
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__TOKEN(LeftBracket) \
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__TOKEN(RightBracket) \
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__TOKEN(Comma) \
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__TOKEN(Asterisk) \
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__TOKEN(Semicolon) \
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__TOKEN(DoubleQuotedString) \
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__TOKEN(SingleQuotedString) \
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__TOKEN(Comment) \
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__TOKEN(Number) \
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__TOKEN(Keyword) \
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__TOKEN(KnownType) \
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__TOKEN(Identifier)
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struct CppPosition {
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size_t line;
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size_t column;
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};
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struct CppToken {
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enum class Type {
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#define __TOKEN(x) x,
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FOR_EACH_TOKEN_TYPE
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#undef __TOKEN
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};
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const char* to_string() const
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{
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switch (m_type) {
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#define __TOKEN(x) \
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case Type::x: \
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return #x;
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FOR_EACH_TOKEN_TYPE
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#undef __TOKEN
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}
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ASSERT_NOT_REACHED();
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}
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Type m_type { Type::Unknown };
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CppPosition m_start;
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CppPosition m_end;
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};
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class CppLexer {
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public:
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CppLexer(const StringView&);
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Vector<CppToken> lex();
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private:
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char peek(size_t offset = 0) const;
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char consume();
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StringView m_input;
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size_t m_index { 0 };
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CppPosition m_previous_position { 0, 0 };
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CppPosition m_position { 0, 0 };
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};
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@ -25,7 +25,6 @@
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*/
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#include "Editor.h"
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#include "CppLexer.h"
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#include "EditorWrapper.h"
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#include <AK/FileSystemPath.h>
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#include <LibCore/DirIterator.h>
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|
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@ -197,98 +196,3 @@ void Editor::mousemove_event(GUI::MouseEvent& event)
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}
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GUI::Application::the().hide_tooltip();
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}
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|
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void Editor::highlight_matching_token_pair()
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{
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enum class Direction {
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Forward,
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Backward,
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};
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|
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auto find_span_of_type = [&](int i, CppToken::Type type, CppToken::Type not_type, Direction direction) {
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int nesting_level = 0;
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bool forward = direction == Direction::Forward;
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for (forward ? ++i : --i; forward ? (i < document().spans().size()) : (i >= 0); forward ? ++i : --i) {
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auto& span = document().spans().at(i);
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auto span_token_type = (CppToken::Type)((uintptr_t)span.data);
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if (span_token_type == not_type) {
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++nesting_level;
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} else if (span_token_type == type) {
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if (nesting_level-- <= 0)
|
||||
return i;
|
||||
}
|
||||
}
|
||||
return -1;
|
||||
};
|
||||
|
||||
auto make_buddies = [&](int index0, int index1) {
|
||||
auto& buddy0 = const_cast<GUI::TextDocumentSpan&>(document().spans()[index0]);
|
||||
auto& buddy1 = const_cast<GUI::TextDocumentSpan&>(document().spans()[index1]);
|
||||
m_has_brace_buddies = true;
|
||||
m_brace_buddies[0].index = index0;
|
||||
m_brace_buddies[1].index = index1;
|
||||
m_brace_buddies[0].span_backup = buddy0;
|
||||
m_brace_buddies[1].span_backup = buddy1;
|
||||
buddy0.background_color = Color::DarkCyan;
|
||||
buddy1.background_color = Color::DarkCyan;
|
||||
buddy0.color = Color::White;
|
||||
buddy1.color = Color::White;
|
||||
update();
|
||||
};
|
||||
|
||||
struct MatchingTokenPair {
|
||||
CppToken::Type open;
|
||||
CppToken::Type close;
|
||||
};
|
||||
|
||||
MatchingTokenPair pairs[] = {
|
||||
{ CppToken::Type::LeftCurly, CppToken::Type::RightCurly },
|
||||
{ CppToken::Type::LeftParen, CppToken::Type::RightParen },
|
||||
{ CppToken::Type::LeftBracket, CppToken::Type::RightBracket },
|
||||
};
|
||||
|
||||
for (int i = 0; i < document().spans().size(); ++i) {
|
||||
auto& span = const_cast<GUI::TextDocumentSpan&>(document().spans().at(i));
|
||||
auto token_type = (CppToken::Type)((uintptr_t)span.data);
|
||||
|
||||
for (auto& pair : pairs) {
|
||||
if (token_type == pair.open && span.range.start() == cursor()) {
|
||||
auto buddy = find_span_of_type(i, pair.close, pair.open, Direction::Forward);
|
||||
if (buddy != -1)
|
||||
make_buddies(i, buddy);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
auto right_of_end = span.range.end();
|
||||
right_of_end.set_column(right_of_end.column() + 1);
|
||||
|
||||
for (auto& pair : pairs) {
|
||||
if (token_type == pair.close && right_of_end == cursor()) {
|
||||
auto buddy = find_span_of_type(i, pair.open, pair.close, Direction::Backward);
|
||||
if (buddy != -1)
|
||||
make_buddies(i, buddy);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void Editor::cursor_did_change()
|
||||
{
|
||||
if (m_has_brace_buddies) {
|
||||
if (m_brace_buddies[0].index >= 0 && m_brace_buddies[0].index < document().spans().size())
|
||||
document().set_span_at_index(m_brace_buddies[0].index, m_brace_buddies[0].span_backup);
|
||||
if (m_brace_buddies[1].index >= 0 && m_brace_buddies[1].index < document().spans().size())
|
||||
document().set_span_at_index(m_brace_buddies[1].index, m_brace_buddies[1].span_backup);
|
||||
m_has_brace_buddies = false;
|
||||
update();
|
||||
}
|
||||
highlight_matching_token_pair();
|
||||
}
|
||||
|
||||
void Editor::notify_did_rehighlight()
|
||||
{
|
||||
m_has_brace_buddies = false;
|
||||
highlight_matching_token_pair();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -41,29 +41,17 @@ public:
|
|||
EditorWrapper& wrapper();
|
||||
const EditorWrapper& wrapper() const;
|
||||
|
||||
void notify_did_rehighlight();
|
||||
|
||||
private:
|
||||
virtual void focusin_event(Core::Event&) override;
|
||||
virtual void focusout_event(Core::Event&) override;
|
||||
virtual void paint_event(GUI::PaintEvent&) override;
|
||||
virtual void mousemove_event(GUI::MouseEvent&) override;
|
||||
virtual void cursor_did_change() override;
|
||||
|
||||
void show_documentation_tooltip_if_available(const String&, const Gfx::Point& screen_location);
|
||||
void highlight_matching_token_pair();
|
||||
|
||||
explicit Editor(GUI::Widget* parent);
|
||||
|
||||
RefPtr<GUI::Window> m_documentation_tooltip_window;
|
||||
RefPtr<HtmlView> m_documentation_html_view;
|
||||
String m_last_parsed_token;
|
||||
|
||||
struct BuddySpan {
|
||||
int index { -1 };
|
||||
GUI::TextDocumentSpan span_backup;
|
||||
};
|
||||
|
||||
bool m_has_brace_buddies { false };
|
||||
BuddySpan m_brace_buddies[2];
|
||||
};
|
||||
|
|
|
|||
|
|
@ -6,7 +6,6 @@ OBJS = \
|
|||
ProcessStateWidget.o \
|
||||
FormEditorWidget.o \
|
||||
FormWidget.o \
|
||||
CppLexer.o \
|
||||
Editor.o \
|
||||
EditorWrapper.o \
|
||||
Locator.o \
|
||||
|
|
|
|||
|
|
@ -24,7 +24,6 @@
|
|||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include "CppLexer.h"
|
||||
#include "CursorTool.h"
|
||||
#include "Editor.h"
|
||||
#include "EditorWrapper.h"
|
||||
|
|
@ -44,6 +43,7 @@
|
|||
#include <LibGUI/Application.h>
|
||||
#include <LibGUI/BoxLayout.h>
|
||||
#include <LibGUI/Button.h>
|
||||
#include <LibGUI/CppSyntaxHighlighter.h>
|
||||
#include <LibGUI/FilePicker.h>
|
||||
#include <LibGUI/InputBox.h>
|
||||
#include <LibGUI/Label.h>
|
||||
|
|
@ -548,70 +548,13 @@ void run(TerminalWrapper& wrapper)
|
|||
wrapper.run_command("make run");
|
||||
}
|
||||
|
||||
struct TextStyle {
|
||||
Color color;
|
||||
const Gfx::Font* font { nullptr };
|
||||
};
|
||||
|
||||
static TextStyle style_for_token_type(CppToken::Type type)
|
||||
{
|
||||
switch (type) {
|
||||
case CppToken::Type::Keyword:
|
||||
return { Color::Black, &Gfx::Font::default_bold_fixed_width_font() };
|
||||
case CppToken::Type::KnownType:
|
||||
return { Color::from_rgb(0x929200), &Gfx::Font::default_bold_fixed_width_font() };
|
||||
case CppToken::Type::Identifier:
|
||||
return { Color::from_rgb(0x000092) };
|
||||
case CppToken::Type::DoubleQuotedString:
|
||||
case CppToken::Type::SingleQuotedString:
|
||||
case CppToken::Type::Number:
|
||||
return { Color::from_rgb(0x920000) };
|
||||
case CppToken::Type::PreprocessorStatement:
|
||||
return { Color::from_rgb(0x009292) };
|
||||
case CppToken::Type::Comment:
|
||||
return { Color::from_rgb(0x009200) };
|
||||
default:
|
||||
return { Color::Black };
|
||||
}
|
||||
}
|
||||
|
||||
static void rehighlight()
|
||||
{
|
||||
auto text = current_editor().text();
|
||||
CppLexer lexer(text);
|
||||
auto tokens = lexer.lex();
|
||||
|
||||
Vector<GUI::TextDocumentSpan> spans;
|
||||
for (auto& token : tokens) {
|
||||
#ifdef DEBUG_SYNTAX_HIGHLIGHTING
|
||||
dbg() << token.to_string() << " @ " << token.m_start.line << ":" << token.m_start.column << " - " << token.m_end.line << ":" << token.m_end.column;
|
||||
#endif
|
||||
GUI::TextDocumentSpan span;
|
||||
span.range.set_start({ token.m_start.line, token.m_start.column });
|
||||
span.range.set_end({ token.m_end.line, token.m_end.column });
|
||||
auto style = style_for_token_type(token.m_type);
|
||||
span.color = style.color;
|
||||
span.font = style.font;
|
||||
span.is_skippable = token.m_type == CppToken::Type::Whitespace;
|
||||
span.data = (void*)token.m_type;
|
||||
spans.append(span);
|
||||
}
|
||||
current_editor().document().set_spans(spans);
|
||||
static_cast<Editor&>(current_editor()).notify_did_rehighlight();
|
||||
current_editor().update();
|
||||
}
|
||||
|
||||
void open_file(const String& filename)
|
||||
{
|
||||
auto file = g_project->get_file(filename);
|
||||
current_editor().set_document(const_cast<GUI::TextDocument&>(file->document()));
|
||||
|
||||
if (filename.ends_with(".cpp") || filename.ends_with(".h")) {
|
||||
current_editor().on_change = [] { rehighlight(); };
|
||||
rehighlight();
|
||||
} else {
|
||||
current_editor().on_change = nullptr;
|
||||
}
|
||||
if (filename.ends_with(".cpp") || filename.ends_with(".h"))
|
||||
current_editor().set_syntax_highlighter(make<GUI::CppSyntaxHighlighter>());
|
||||
|
||||
if (filename.ends_with(".frm")) {
|
||||
set_edit_mode(EditMode::Form);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue