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https://github.com/LadybirdBrowser/ladybird.git
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a35693915e
Now that fonts know their own weight, we no longer need highlighters to tell us which font to use. Instead, they can just say "this should be bold" and we'll find the right font ourselves.
127 lines
5 KiB
C++
127 lines
5 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 <LibCpp/Lexer.h>
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#include <LibGUI/CppSyntaxHighlighter.h>
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#include <LibGUI/TextEditor.h>
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#include <LibGfx/Font.h>
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#include <LibGfx/Palette.h>
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namespace GUI {
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static TextStyle style_for_token_type(Gfx::Palette palette, Cpp::Token::Type type)
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{
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switch (type) {
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case Cpp::Token::Type::Keyword:
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return { palette.syntax_keyword(), true };
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case Cpp::Token::Type::KnownType:
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return { palette.syntax_type(), true };
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case Cpp::Token::Type::Identifier:
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return { palette.syntax_identifier(), false };
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case Cpp::Token::Type::DoubleQuotedString:
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case Cpp::Token::Type::SingleQuotedString:
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case Cpp::Token::Type::RawString:
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return { palette.syntax_string(), false };
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case Cpp::Token::Type::Integer:
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case Cpp::Token::Type::Float:
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return { palette.syntax_number(), false };
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case Cpp::Token::Type::IncludePath:
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return { palette.syntax_preprocessor_value(), false };
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case Cpp::Token::Type::EscapeSequence:
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return { palette.syntax_keyword(), true };
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case Cpp::Token::Type::PreprocessorStatement:
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case Cpp::Token::Type::IncludeStatement:
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return { palette.syntax_preprocessor_statement(), false };
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case Cpp::Token::Type::Comment:
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return { palette.syntax_comment(), false };
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default:
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return { palette.base_text(), false };
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}
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}
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bool CppSyntaxHighlighter::is_identifier(void* token) const
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{
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auto cpp_token = static_cast<Cpp::Token::Type>(reinterpret_cast<size_t>(token));
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return cpp_token == Cpp::Token::Type::Identifier;
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}
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bool CppSyntaxHighlighter::is_navigatable(void* token) const
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{
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auto cpp_token = static_cast<Cpp::Token::Type>(reinterpret_cast<size_t>(token));
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return cpp_token == Cpp::Token::Type::IncludePath;
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}
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void CppSyntaxHighlighter::rehighlight(Gfx::Palette palette)
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{
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ASSERT(m_editor);
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auto text = m_editor->text();
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Cpp::Lexer lexer(text);
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auto tokens = lexer.lex();
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Vector<GUI::TextDocumentSpan> spans;
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for (auto& token : tokens) {
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#ifdef DEBUG_SYNTAX_HIGHLIGHTING
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dbg() << token.to_string() << " @ " << token.m_start.line << ":" << token.m_start.column << " - " << token.m_end.line << ":" << token.m_end.column;
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#endif
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GUI::TextDocumentSpan span;
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span.range.set_start({ token.m_start.line, token.m_start.column });
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span.range.set_end({ token.m_end.line, token.m_end.column });
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auto style = style_for_token_type(palette, token.m_type);
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span.color = style.color;
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span.bold = style.bold;
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span.is_skippable = token.m_type == Cpp::Token::Type::Whitespace;
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span.data = reinterpret_cast<void*>(token.m_type);
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spans.append(span);
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}
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m_editor->document().set_spans(spans);
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m_has_brace_buddies = false;
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highlight_matching_token_pair();
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m_editor->update();
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}
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Vector<SyntaxHighlighter::MatchingTokenPair> CppSyntaxHighlighter::matching_token_pairs() const
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{
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static Vector<SyntaxHighlighter::MatchingTokenPair> pairs;
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if (pairs.is_empty()) {
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pairs.append({ reinterpret_cast<void*>(Cpp::Token::Type::LeftCurly), reinterpret_cast<void*>(Cpp::Token::Type::RightCurly) });
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pairs.append({ reinterpret_cast<void*>(Cpp::Token::Type::LeftParen), reinterpret_cast<void*>(Cpp::Token::Type::RightParen) });
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pairs.append({ reinterpret_cast<void*>(Cpp::Token::Type::LeftBracket), reinterpret_cast<void*>(Cpp::Token::Type::RightBracket) });
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}
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return pairs;
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}
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bool CppSyntaxHighlighter::token_types_equal(void* token1, void* token2) const
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{
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return static_cast<Cpp::Token::Type>(reinterpret_cast<size_t>(token1)) == static_cast<Cpp::Token::Type>(reinterpret_cast<size_t>(token2));
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}
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CppSyntaxHighlighter::~CppSyntaxHighlighter()
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{
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}
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}
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