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/*
* Copyright (c) 2020, the SerenityOS developers.
* 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 <LibCpp/Lexer.h>
#include <LibGUI/CppSyntaxHighlighter.h>
#include <LibGUI/TextEditor.h>
#include <LibGfx/Font.h>
#include <LibGfx/Palette.h>
namespace GUI {
static TextStyle style_for_token_type(Gfx::Palette palette, Cpp::Token::Type type)
{
switch (type) {
case Cpp::Token::Type::Keyword:
return { palette.syntax_keyword(), true };
case Cpp::Token::Type::KnownType:
return { palette.syntax_type(), true };
case Cpp::Token::Type::Identifier:
return { palette.syntax_identifier(), false };
case Cpp::Token::Type::DoubleQuotedString:
case Cpp::Token::Type::SingleQuotedString:
case Cpp::Token::Type::RawString:
return { palette.syntax_string(), false };
case Cpp::Token::Type::Integer:
case Cpp::Token::Type::Float:
return { palette.syntax_number(), false };
case Cpp::Token::Type::IncludePath:
return { palette.syntax_preprocessor_value(), false };
case Cpp::Token::Type::EscapeSequence:
return { palette.syntax_keyword(), true };
case Cpp::Token::Type::PreprocessorStatement:
case Cpp::Token::Type::IncludeStatement:
return { palette.syntax_preprocessor_statement(), false };
case Cpp::Token::Type::Comment:
return { palette.syntax_comment(), false };
default:
return { palette.base_text(), false };
}
}
bool CppSyntaxHighlighter::is_identifier(void* token) const
{
auto cpp_token = static_cast<Cpp::Token::Type>(reinterpret_cast<size_t>(token));
return cpp_token == Cpp::Token::Type::Identifier;
}
bool CppSyntaxHighlighter::is_navigatable(void* token) const
{
auto cpp_token = static_cast<Cpp::Token::Type>(reinterpret_cast<size_t>(token));
return cpp_token == Cpp::Token::Type::IncludePath;
}
void CppSyntaxHighlighter::rehighlight(Gfx::Palette palette)
{
ASSERT(m_editor);
auto text = m_editor->text();
Cpp::Lexer 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(palette, token.m_type);
span.attributes.color = style.color;
span.attributes.bold = style.bold;
span.is_skippable = token.m_type == Cpp::Token::Type::Whitespace;
span.data = reinterpret_cast<void*>(token.m_type);
spans.append(span);
}
m_editor->document().set_spans(spans);
m_has_brace_buddies = false;
highlight_matching_token_pair();
m_editor->update();
}
Vector<SyntaxHighlighter::MatchingTokenPair> CppSyntaxHighlighter::matching_token_pairs() const
{
static Vector<SyntaxHighlighter::MatchingTokenPair> pairs;
if (pairs.is_empty()) {
pairs.append({ reinterpret_cast<void*>(Cpp::Token::Type::LeftCurly), reinterpret_cast<void*>(Cpp::Token::Type::RightCurly) });
pairs.append({ reinterpret_cast<void*>(Cpp::Token::Type::LeftParen), reinterpret_cast<void*>(Cpp::Token::Type::RightParen) });
pairs.append({ reinterpret_cast<void*>(Cpp::Token::Type::LeftBracket), reinterpret_cast<void*>(Cpp::Token::Type::RightBracket) });
}
return pairs;
}
bool CppSyntaxHighlighter::token_types_equal(void* token1, void* token2) const
{
return static_cast<Cpp::Token::Type>(reinterpret_cast<size_t>(token1)) == static_cast<Cpp::Token::Type>(reinterpret_cast<size_t>(token2));
}
CppSyntaxHighlighter::~CppSyntaxHighlighter()
{
}
}
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