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serenity/Userland/Applications/Help/main.cpp
sin-ack 8ea22121ac Userland: Migrate to argument-less deferred_invoke 
Only one place used this argument and it was to hold on to a strong ref
for the object. Since we already do that now, there's no need to keep
this argument around since this can be easily captured.

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2021-09-02 03:47:47 +04:30

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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "History.h"
#include "ManualModel.h"
#include <AK/URL.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibDesktop/Launcher.h>
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Clipboard.h>
#include <LibGUI/FilteringProxyModel.h>
#include <LibGUI/ListView.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Menubar.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Splitter.h>
#include <LibGUI/Statusbar.h>
#include <LibGUI/TabWidget.h>
#include <LibGUI/TextBox.h>
#include <LibGUI/Toolbar.h>
#include <LibGUI/ToolbarContainer.h>
#include <LibGUI/TreeView.h>
#include <LibGUI/Window.h>
#include <LibMarkdown/Document.h>
#include <LibWeb/OutOfProcessWebView.h>
#include <libgen.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int main(int argc, char* argv[])
{
if (pledge("stdio recvfd sendfd rpath unix", nullptr) < 0) {
perror("pledge");
return 1;
}
auto app = GUI::Application::construct(argc, argv);
if (unveil("/res", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil("/usr/share/man", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil("/tmp/portal/launch", "rw") < 0) {
perror("unveil");
return 1;
}
if (unveil("/tmp/portal/webcontent", "rw") < 0) {
perror("unveil");
return 1;
}
unveil(nullptr, nullptr);
const char* start_page = nullptr;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(start_page, "Page to open at launch", "page", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
auto app_icon = GUI::Icon::default_icon("app-help");
auto window = GUI::Window::construct();
window->set_icon(app_icon.bitmap_for_size(16));
window->set_title("Help");
window->resize(570, 500);
auto& widget = window->set_main_widget<GUI::Widget>();
widget.set_layout<GUI::VerticalBoxLayout>();
widget.set_fill_with_background_color(true);
widget.layout()->set_spacing(2);
auto& toolbar_container = widget.add<GUI::ToolbarContainer>();
auto& toolbar = toolbar_container.add<GUI::Toolbar>();
auto& splitter = widget.add<GUI::HorizontalSplitter>();
splitter.layout()->set_spacing(5);
auto model = ManualModel::create();
auto& left_tab_bar = splitter.add<GUI::TabWidget>();
auto& tree_view_container = left_tab_bar.add_tab<GUI::Widget>("Browse");
tree_view_container.set_layout<GUI::VerticalBoxLayout>();
tree_view_container.layout()->set_margins(4);
auto& tree_view = tree_view_container.add<GUI::TreeView>();
auto& search_view = left_tab_bar.add_tab<GUI::Widget>("Search");
search_view.set_layout<GUI::VerticalBoxLayout>();
search_view.layout()->set_margins(4);
auto& search_box = search_view.add<GUI::TextBox>();
auto& search_list_view = search_view.add<GUI::ListView>();
search_box.set_fixed_height(20);
search_box.set_placeholder("Search...");
search_box.on_change = [&] {
if (auto model = search_list_view.model()) {
auto& search_model = *static_cast<GUI::FilteringProxyModel*>(model);
search_model.set_filter_term(search_box.text());
search_model.invalidate();
}
};
search_list_view.set_model(GUI::FilteringProxyModel::construct(model));
search_list_view.model()->invalidate();
tree_view.set_model(model);
left_tab_bar.set_fixed_width(200);
auto& page_view = splitter.add<Web::OutOfProcessWebView>();
History history;
RefPtr<GUI::Action> go_back_action;
RefPtr<GUI::Action> go_forward_action;
auto update_actions = [&]() {
go_back_action->set_enabled(history.can_go_back());
go_forward_action->set_enabled(history.can_go_forward());
};
auto open_page = [&](const String& path) {
if (path.is_null()) {
window->set_title("Help");
page_view.load_empty_document();
return;
}
auto source_result = model->page_view(path);
if (source_result.is_error()) {
GUI::MessageBox::show(window, source_result.error().string(), "Failed to open man page", GUI::MessageBox::Type::Error);
return;
}
auto source = source_result.value();
String html;
{
auto md_document = Markdown::Document::parse(source);
VERIFY(md_document);
html = md_document->render_to_html();
}
auto url = URL::create_with_file_protocol(path);
page_view.load_html(html, url);
app->deferred_invoke([&, path] {
auto tree_view_index = model->index_from_path(path);
if (tree_view_index.has_value()) {
tree_view.expand_tree(tree_view_index.value().parent());
tree_view.selection().set(tree_view_index.value());
String page_and_section = model->page_and_section(tree_view_index.value());
window->set_title(String::formatted("{} - Help", page_and_section));
} else {
window->set_title("Help");
}
});
};
tree_view.on_selection_change = [&] {
String path = model->page_path(tree_view.selection().first());
if (path.is_null())
return;
history.push(path);
update_actions();
open_page(path);
};
tree_view.on_toggle = [&](const GUI::ModelIndex& index, const bool open) {
model->update_section_node_on_toggle(index, open);
};
auto open_external = [&](auto& url) {
if (!Desktop::Launcher::open(url)) {
GUI::MessageBox::show(window,
String::formatted("The link to '{}' could not be opened.", url),
"Failed to open link",
GUI::MessageBox::Type::Error);
}
};
search_list_view.on_selection_change = [&] {
const auto& index = search_list_view.selection().first();
if (!index.is_valid())
return;
auto view_model = search_list_view.model();
if (!view_model) {
page_view.load_empty_document();
return;
}
auto& search_model = *static_cast<GUI::FilteringProxyModel*>(view_model);
const auto& mapped_index = search_model.map(index);
String path = model->page_path(mapped_index);
if (path.is_null()) {
page_view.load_empty_document();
return;
}
tree_view.selection().clear();
tree_view.selection().add(mapped_index);
history.push(path);
update_actions();
open_page(path);
};
page_view.on_link_click = [&](auto& url, auto&, unsigned) {
if (url.protocol() != "file") {
open_external(url);
return;
}
auto path = Core::File::real_path_for(url.path());
if (!path.starts_with("/usr/share/man/")) {
open_external(url);
return;
}
auto tree_view_index = model->index_from_path(path);
if (tree_view_index.has_value()) {
dbgln("Found path _{}_ in model at index {}", path, tree_view_index.value());
tree_view.selection().set(tree_view_index.value());
return;
}
history.push(path);
update_actions();
open_page(path);
};
go_back_action = GUI::CommonActions::make_go_back_action([&](auto&) {
history.go_back();
update_actions();
open_page(history.current());
});
go_forward_action = GUI::CommonActions::make_go_forward_action([&](auto&) {
history.go_forward();
update_actions();
open_page(history.current());
});
go_back_action->set_enabled(false);
go_forward_action->set_enabled(false);
auto go_home_action = GUI::CommonActions::make_go_home_action([&](auto&) {
String path = "/usr/share/man/man7/Help-index.md";
history.push(path);
update_actions();
open_page(path);
});
toolbar.add_action(*go_back_action);
toolbar.add_action(*go_forward_action);
toolbar.add_action(*go_home_action);
auto& file_menu = window->add_menu("&File");
file_menu.add_action(GUI::CommonActions::make_quit_action([](auto&) {
GUI::Application::the()->quit();
}));
auto& go_menu = window->add_menu("&Go");
go_menu.add_action(*go_back_action);
go_menu.add_action(*go_forward_action);
go_menu.add_action(*go_home_action);
auto& help_menu = window->add_menu("&Help");
help_menu.add_action(GUI::CommonActions::make_about_action("Help", app_icon, window));
auto context_menu = GUI::Menu::construct();
context_menu->add_action(*go_back_action);
context_menu->add_action(*go_forward_action);
context_menu->add_action(*go_home_action);
context_menu->add_separator();
RefPtr<GUI::Action> copy_action = GUI::CommonActions::make_copy_action([&](auto&) {
auto selected_text = page_view.selected_text();
if (!selected_text.is_empty())
GUI::Clipboard::the().set_plain_text(selected_text);
});
context_menu->add_action(*copy_action);
RefPtr<GUI::Action> select_all_function = GUI::CommonActions::make_select_all_action([&](auto&) {
page_view.select_all();
});
context_menu->add_action(*select_all_function);
page_view.on_context_menu_request = [&](auto& screen_position) {
copy_action->set_enabled(!page_view.selected_text().is_empty());
context_menu->popup(screen_position);
};
if (start_page) {
URL url = URL::create_with_url_or_path(start_page);
if (url.is_valid() && url.path().ends_with(".md")) {
history.push(url.path());
update_actions();
open_page(url.path());
} else {
left_tab_bar.set_active_widget(&search_view);
search_box.set_text(start_page);
if (auto model = search_list_view.model()) {
auto& search_model = *static_cast<GUI::FilteringProxyModel*>(model);
search_model.set_filter_term(search_box.text());
}
}
} else {
go_home_action->activate();
}
auto& statusbar = widget.add<GUI::Statusbar>();
app->on_action_enter = [&statusbar](GUI::Action const& action) {
statusbar.set_override_text(action.status_tip());
};
app->on_action_leave = [&statusbar](GUI::Action const&) {
statusbar.set_override_text({});
};
page_view.on_link_hover = [&](URL const& url) {
if (url.is_valid())
statusbar.set_text(url.to_string());
else
statusbar.set_text({});
};
window->set_focused_widget(&left_tab_bar);
window->show();
return app->exec();
}
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