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/*
* Copyright (c) 2021, Dylan Katz <dykatz@uw.edu>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <LibGUI/TextEditor.h>
#include <LibGfx/Font.h>
#include <LibGfx/Palette.h>
#include <LibSQL/Lexer.h>
#include <LibSQL/SyntaxHighlighter.h>
namespace SQL {
static Syntax::TextStyle style_for_token_type(const Gfx::Palette& palette, TokenType type)
{
switch (Token::category(type)) {
case TokenCategory::Keyword:
return { palette.syntax_keyword(), true };
case TokenCategory::Identifier:
return { palette.syntax_identifier(), false };
case TokenCategory::Number:
return { palette.syntax_number(), false };
case TokenCategory::Blob:
case TokenCategory::String:
return { palette.syntax_string(), false };
case TokenCategory::Operator:
return { palette.syntax_operator(), false };
case TokenCategory::Punctuation:
return { palette.syntax_punctuation(), false };
case TokenCategory::Invalid:
default:
return { palette.base_text(), false };
}
}
bool SyntaxHighlighter::is_identifier(void* token) const
{
auto sql_token = static_cast<SQL::TokenType>(reinterpret_cast<size_t>(token));
return sql_token == SQL::TokenType::Identifier;
}
void SyntaxHighlighter::rehighlight(const Palette& palette)
{
auto text = m_client->get_text();
SQL::Lexer lexer(text);
Vector<GUI::TextDocumentSpan> spans;
auto append_token = [&](StringView str, const SQL::Token& token) {
if (str.is_empty())
return;
GUI::TextPosition position { token.line_number() - 1, token.line_column() - 1 };
for (size_t i = 0; i < str.length() - 1; ++i) {
if (str[i] == '\n') {
position.set_line(position.line() + 1);
position.set_column(0);
} else
position.set_column(position.column() + 1);
}
GUI::TextDocumentSpan span;
span.range.set_start({ token.line_number() - 1, token.line_column() - 1 });
span.range.set_end({ position.line(), position.column() });
auto style = style_for_token_type(palette, token.type());
span.attributes.color = style.color;
span.attributes.bold = style.bold;
span.data = reinterpret_cast<void*>(static_cast<size_t>(token.type()));
spans.append(span);
dbgln_if(SYNTAX_HIGHLIGHTING_DEBUG, "{} @ '{}' {}:{} - {}:{}",
token.name(),
token.value(),
span.range.start().line(), span.range.start().column(),
span.range.end().line(), span.range.end().column());
};
bool was_eof = false;
for (auto token = lexer.next(); !was_eof; token = lexer.next()) {
append_token(token.value(), token);
if (token.type() == SQL::TokenType::Eof)
was_eof = true;
}
m_client->do_set_spans(move(spans));
m_has_brace_buddies = false;
highlight_matching_token_pair();
m_client->do_update();
}
Vector<SyntaxHighlighter::MatchingTokenPair> SyntaxHighlighter::matching_token_pairs() const
{
static Vector<SyntaxHighlighter::MatchingTokenPair> pairs;
if (pairs.is_empty()) {
pairs.append({ reinterpret_cast<void*>(TokenType::ParenOpen), reinterpret_cast<void*>(TokenType::ParenClose) });
}
return pairs;
}
bool SyntaxHighlighter::token_types_equal(void* token1, void* token2) const
{
return static_cast<TokenType>(reinterpret_cast<size_t>(token1)) == static_cast<TokenType>(reinterpret_cast<size_t>(token2));
}
SyntaxHighlighter::~SyntaxHighlighter()
{
}
}
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