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HackStudio: Lex C++ files and apply some basic syntax highlighting

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When we open a file whose name ends in ".cpp", we now pass the contents
through CppLexer, which produces a CppToken stream.

Those CppTokens are then converted into GTextEditor::Spans and handed
over to GTextEditor which then colorizes the source code accordingly.

This is pretty neat. :^)
This commit is contained in:
Andreas Kling 2019-10-25 21:09:16 +02:00
parent 0604fcf9fd
commit 6afe27b914
1 changed files with 40 additions and 1 deletions
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41
DevTools/HackStudio/main.cpp
View file

@ -1,3 +1,4 @@
#include "CppLexer.h"
#include "FindInFilesWidget.h"
#include "Project.h"
#include "TerminalWrapper.h"
@ -190,6 +191,27 @@ void run(TerminalWrapper& wrapper)
wrapper.run_command("make run");
}
static Color color_for_token_type(CppToken::Type type)
{
switch (type) {
case CppToken::Type::Keyword:
return Color::Green;
case CppToken::Type::Identifier:
return Color::Blue;
case CppToken::Type::DoubleQuotedString:
case CppToken::Type::SingleQuotedString:
return Color::Red;
case CppToken::Type::Number:
return Color::Blue;
case CppToken::Type::PreprocessorStatement:
return Color::Magenta;
case CppToken::Type::Comment:
return Color::MidGray;
default:
return Color::Black;
}
}
void open_file(const String& filename)
{
auto file = CFile::construct(filename);
@ -197,8 +219,25 @@ void open_file(const String& filename)
GMessageBox::show("Could not open!", "Error", GMessageBox::Type::Error, GMessageBox::InputType::OK, g_window);
return;
}
g_text_editor->set_text(file->read_all());
auto contents = file->read_all();
g_text_editor->set_text(contents);
g_currently_open_file = filename;
g_window->set_title(String::format("%s - HackStudio", g_currently_open_file.characters()));
g_project_list_view->update();
if (filename.ends_with(".cpp")) {
CppLexer lexer(contents);
auto tokens = lexer.lex();
Vector<GTextEditor::Span> spans;
for (auto& token : tokens) {
dbg() << token.to_string() << " @ " << token.m_start.line << ":" << token.m_start.column << " - " << token.m_end.line << ":" << token.m_end.column;
GTextEditor::Span span;
span.start = { token.m_start.line, token.m_start.column };
span.end = { token.m_end.line, token.m_end.column };
span.color = color_for_token_type(token.m_type);
spans.append(span);
}
g_text_editor->set_spans(spans);
}
}