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/*
* Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "EvaluateExpressionDialog.h"
#include "DebuggerGlobalJSObject.h"
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Button.h>
#include <LibGUI/TextBox.h>
#include <LibGUI/Widget.h>
#include <LibGfx/FontDatabase.h>
#include <LibJS/Interpreter.h>
#include <LibJS/MarkupGenerator.h>
#include <LibJS/Parser.h>
#include <LibJS/SyntaxHighlighter.h>
#include <LibWeb/DOM/DocumentType.h>
namespace HackStudio {
static JS::VM& global_vm()
{
static RefPtr<JS::VM> vm;
if (!vm)
vm = JS::VM::create();
return *vm;
}
EvaluateExpressionDialog::EvaluateExpressionDialog(Window* parent_window)
: Dialog(parent_window)
, m_interpreter(JS::Interpreter::create<DebuggerGlobalJSObject>(global_vm()))
{
set_title("Evaluate Expression");
set_icon(parent_window->icon());
build(parent_window);
}
void EvaluateExpressionDialog::build(Window* parent_window)
{
auto& widget = set_main_widget<GUI::Widget>();
int width = max(parent_window->width() / 2, 150);
int height = max(parent_window->height() * (2 / 3), 350);
set_rect(x(), y(), width, height);
widget.set_layout<GUI::VerticalBoxLayout>();
widget.set_fill_with_background_color(true);
widget.layout()->set_margins(6);
widget.layout()->set_spacing(6);
m_text_editor = widget.add<GUI::TextBox>();
m_text_editor->set_fixed_height(19);
m_text_editor->set_syntax_highlighter(make<JS::SyntaxHighlighter>());
m_text_editor->set_font(Gfx::FontDatabase::default_fixed_width_font());
m_text_editor->set_history_enabled(true);
auto base_document = Web::DOM::Document::create();
base_document->append_child(adopt_ref(*new Web::DOM::DocumentType(base_document)));
auto html_element = base_document->create_element("html");
base_document->append_child(html_element);
auto head_element = base_document->create_element("head");
html_element->append_child(head_element);
auto body_element = base_document->create_element("body");
html_element->append_child(body_element);
m_output_container = body_element;
m_output_view = widget.add<Web::InProcessWebView>();
m_output_view->set_document(base_document);
auto& button_container_outer = widget.add<GUI::Widget>();
button_container_outer.set_fixed_height(20);
button_container_outer.set_layout<GUI::VerticalBoxLayout>();
auto& button_container_inner = button_container_outer.add<GUI::Widget>();
button_container_inner.set_layout<GUI::HorizontalBoxLayout>();
button_container_inner.layout()->set_spacing(6);
button_container_inner.layout()->set_margins({ 4, 0, 4 });
button_container_inner.layout()->add_spacer();
m_evaluate_button = button_container_inner.add<GUI::Button>();
m_evaluate_button->set_fixed_height(20);
m_evaluate_button->set_text("Evaluate");
m_evaluate_button->on_click = [this](auto) {
handle_evaluation(m_text_editor->text());
};
m_close_button = button_container_inner.add<GUI::Button>();
m_close_button->set_fixed_height(20);
m_close_button->set_text("Close");
m_close_button->on_click = [this](auto) {
done(ExecOK);
};
m_text_editor->on_return_pressed = [this] {
m_evaluate_button->click();
};
m_text_editor->on_escape_pressed = [this] {
m_close_button->click();
};
m_text_editor->set_focus(true);
}
void EvaluateExpressionDialog::handle_evaluation(const String& expression)
{
m_output_container->remove_all_children();
m_output_view->update();
auto parser = JS::Parser(JS::Lexer(expression));
auto program = parser.parse_program();
StringBuilder output_html;
if (parser.has_errors()) {
auto error = parser.errors()[0];
auto hint = error.source_location_hint(expression);
if (!hint.is_empty())
output_html.append(String::formatted("<pre>{}</pre>", escape_html_entities(hint)));
m_interpreter->vm().throw_exception<JS::SyntaxError>(m_interpreter->global_object(), error.to_string());
} else {
m_interpreter->run(m_interpreter->global_object(), *program);
}
if (m_interpreter->exception()) {
auto* exception = m_interpreter->exception();
m_interpreter->vm().clear_exception();
output_html.append("Uncaught exception: ");
auto error = exception->value();
if (error.is_object())
output_html.append(JS::MarkupGenerator::html_from_error(error.as_object()));
else
output_html.append(JS::MarkupGenerator::html_from_value(error));
set_output(output_html.string_view());
return;
}
set_output(JS::MarkupGenerator::html_from_value(m_interpreter->vm().last_value()));
}
void EvaluateExpressionDialog::set_output(const StringView& html)
{
auto paragraph = m_output_container->document().create_element("p");
paragraph->set_inner_html(html);
m_output_container->append_child(paragraph);
m_output_container->document().invalidate_layout();
m_output_container->document().update_layout();
}
}
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