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serenity/Applications/Browser/Tab.cpp
Andreas Kling d6ab9e6790 Browser: Add a basic GUI download feature 
We now allow you to download files by right-clicking a link and then
choosing "Download".

All files are currently saved to the standard downloads location that
we get from Core::StandardPaths::downloads_directory().

In the future, we'll probably want to come up with a more restrictive
way of doing the "write to disk" portion of this.
We should also improve the ProtocolServer to allow streaming of data
instead of writing everything in one big go.

At the moment, I'm just pretty happy with this GUI. :^)
2020-05-05 23:58:22 +02:00

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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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 "Tab.h"
#include "BookmarksBarWidget.h"
#include "DownloadWidget.h"
#include "History.h"
#include "InspectorWidget.h"
#include "WindowActions.h"
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Button.h>
#include <LibGUI/Menu.h>
#include <LibGUI/MenuBar.h>
#include <LibGUI/StatusBar.h>
#include <LibGUI/TextBox.h>
#include <LibGUI/ToolBar.h>
#include <LibGUI/ToolBarContainer.h>
#include <LibGUI/Window.h>
#include <LibWeb/CSS/StyleResolver.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOMTreeModel.h>
#include <LibWeb/Dump.h>
#include <LibWeb/Frame.h>
#include <LibWeb/HtmlView.h>
#include <LibWeb/Layout/LayoutBlock.h>
#include <LibWeb/Layout/LayoutDocument.h>
#include <LibWeb/Layout/LayoutInline.h>
#include <LibWeb/Layout/LayoutNode.h>
#include <LibWeb/Parser/CSSParser.h>
#include <LibWeb/Parser/HTMLParser.h>
#include <LibWeb/ResourceLoader.h>
namespace Browser {
static const char* home_url = "file:///home/anon/www/welcome.html";
Tab::Tab()
{
auto& widget = *this;
set_layout<GUI::VerticalBoxLayout>();
m_toolbar_container = widget.add<GUI::ToolBarContainer>();
auto& toolbar = m_toolbar_container->add<GUI::ToolBar>();
m_html_widget = widget.add<Web::HtmlView>();
m_go_back_action = GUI::CommonActions::make_go_back_action([this](auto&) {
m_history.go_back();
update_actions();
TemporaryChange<bool> change(m_should_push_loads_to_history, false);
m_html_widget->load(m_history.current());
});
m_go_forward_action = GUI::CommonActions::make_go_forward_action([this](auto&) {
m_history.go_forward();
update_actions();
TemporaryChange<bool> change(m_should_push_loads_to_history, false);
m_html_widget->load(m_history.current());
});
toolbar.add_action(*m_go_back_action);
toolbar.add_action(*m_go_forward_action);
toolbar.add_action(GUI::CommonActions::make_go_home_action([this](auto&) {
m_html_widget->load(home_url);
}));
toolbar.add_action(GUI::CommonActions::make_reload_action([this](auto&) {
TemporaryChange<bool> change(m_should_push_loads_to_history, false);
m_html_widget->reload();
}));
m_location_box = toolbar.add<GUI::TextBox>();
m_location_box->on_return_pressed = [this] {
m_html_widget->load(m_location_box->text());
};
m_bookmark_button = toolbar.add<GUI::Button>();
m_bookmark_button->set_button_style(Gfx::ButtonStyle::CoolBar);
m_bookmark_button->set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/star-black.png"));
m_bookmark_button->set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fixed);
m_bookmark_button->set_preferred_size(22, 22);
m_bookmark_button->on_click = [this] {
auto url = m_html_widget->main_frame().document()->url().to_string();
if (BookmarksBarWidget::the().contains_bookmark(url)) {
BookmarksBarWidget::the().remove_bookmark(url);
} else {
BookmarksBarWidget::the().add_bookmark(url, m_title);
}
update_bookmark_button(url);
};
m_html_widget->on_load_start = [this](auto& url) {
m_location_box->set_text(url.to_string());
if (m_should_push_loads_to_history)
m_history.push(url);
update_actions();
update_bookmark_button(url.to_string());
};
m_html_widget->on_link_click = [this](auto& href, auto& target, unsigned modifiers) {
if (href.starts_with("#")) {
auto anchor = href.substring_view(1, href.length() - 1);
m_html_widget->scroll_to_anchor(anchor);
} else {
auto url = m_html_widget->document()->complete_url(href);
if (target == "_blank" || modifiers == Mod_Ctrl)
on_tab_open_request(url);
else
m_html_widget->load(url);
}
};
m_link_context_menu = GUI::Menu::construct();
m_link_context_menu->add_action(GUI::Action::create("Open", [this](auto&) {
m_html_widget->on_link_click(m_link_context_menu_href, "", 0);
}));
m_link_context_menu->add_action(GUI::Action::create("Open in new tab", [this](auto&) {
m_html_widget->on_link_click(m_link_context_menu_href, "_blank", 0);
}));
m_link_context_menu->add_separator();
m_link_context_menu->add_action(GUI::Action::create("Download", [this](auto&) {
auto window = GUI::Window::construct();
window->set_rect(300, 300, 300, 150);
auto url = m_html_widget->document()->complete_url(m_link_context_menu_href);
window->set_title(String::format("0% of %s", url.basename().characters()));
window->set_resizable(false);
window->set_main_widget<DownloadWidget>(url);
window->show();
(void)window.leak_ref();
}));
m_html_widget->on_link_context_menu_request = [this](auto& href, auto& screen_position) {
m_link_context_menu_href = href;
m_link_context_menu->popup(screen_position);
};
m_html_widget->on_title_change = [this](auto& title) {
if (title.is_null()) {
m_title = m_html_widget->main_frame().document()->url().to_string();
} else {
m_title = title;
}
if (on_title_change)
on_title_change(m_title);
};
m_html_widget->on_favicon_change = [this](auto& icon) {
m_icon = icon;
if (on_favicon_change)
on_favicon_change(icon);
};
auto focus_location_box_action = GUI::Action::create(
"Focus location box", { Mod_Ctrl, Key_L }, [this](auto&) {
m_location_box->select_all();
m_location_box->set_focus(true);
},
this);
m_statusbar = widget.add<GUI::StatusBar>();
m_html_widget->on_link_hover = [this](auto& href) {
m_statusbar->set_text(href);
};
m_menubar = GUI::MenuBar::construct();
auto& app_menu = m_menubar->add_menu("Browser");
app_menu.add_action(WindowActions::the().create_new_tab_action());
app_menu.add_action(GUI::Action::create(
"Close tab", { Mod_Ctrl, Key_W }, Gfx::Bitmap::load_from_file("/res/icons/16x16/close-tab.png"), [this](auto&) {
on_tab_close_request(*this);
},
this));
app_menu.add_action(GUI::Action::create(
"Reload", { Mod_None, Key_F5 }, Gfx::Bitmap::load_from_file("/res/icons/16x16/reload.png"), [this](auto&) {
TemporaryChange<bool> change(m_should_push_loads_to_history, false);
m_html_widget->reload();
},
this));
app_menu.add_separator();
app_menu.add_action(GUI::CommonActions::make_quit_action([](auto&) {
GUI::Application::the().quit();
}));
auto& inspect_menu = m_menubar->add_menu("Inspect");
inspect_menu.add_action(GUI::Action::create(
"View source", { Mod_Ctrl, Key_U }, [this](auto&) {
String filename_to_open;
char tmp_filename[] = "/tmp/view-source.XXXXXX";
ASSERT(m_html_widget->document());
if (m_html_widget->document()->url().protocol() == "file") {
filename_to_open = m_html_widget->document()->url().path();
} else {
int fd = mkstemp(tmp_filename);
ASSERT(fd >= 0);
auto source = m_html_widget->document()->source();
write(fd, source.characters(), source.length());
close(fd);
filename_to_open = tmp_filename;
}
if (fork() == 0) {
execl("/bin/TextEditor", "TextEditor", filename_to_open.characters(), nullptr);
ASSERT_NOT_REACHED();
}
},
this));
inspect_menu.add_action(GUI::Action::create(
"Inspect DOM tree", { Mod_None, Key_F12 }, [this](auto&) {
if (!m_dom_inspector_window) {
m_dom_inspector_window = GUI::Window::construct();
m_dom_inspector_window->set_rect(100, 100, 300, 500);
m_dom_inspector_window->set_title("DOM inspector");
m_dom_inspector_window->set_main_widget<InspectorWidget>();
}
auto* inspector_widget = static_cast<InspectorWidget*>(m_dom_inspector_window->main_widget());
inspector_widget->set_document(m_html_widget->document());
m_dom_inspector_window->show();
m_dom_inspector_window->move_to_front();
},
this));
auto& debug_menu = m_menubar->add_menu("Debug");
debug_menu.add_action(GUI::Action::create(
"Dump DOM tree", [this](auto&) {
Web::dump_tree(*m_html_widget->document());
},
this));
debug_menu.add_action(GUI::Action::create(
"Dump Layout tree", [this](auto&) {
Web::dump_tree(*m_html_widget->document()->layout_node());
},
this));
debug_menu.add_action(GUI::Action::create(
"Dump Style sheets", [this](auto&) {
for (auto& sheet : m_html_widget->document()->stylesheets()) {
dump_sheet(sheet);
}
},
this));
debug_menu.add_separator();
auto line_box_borders_action = GUI::Action::create_checkable(
"Line box borders", [this](auto& action) {
m_html_widget->set_should_show_line_box_borders(action.is_checked());
m_html_widget->update();
},
this);
line_box_borders_action->set_checked(false);
debug_menu.add_action(line_box_borders_action);
auto& bookmarks_menu = m_menubar->add_menu("Bookmarks");
bookmarks_menu.add_action(WindowActions::the().show_bookmarks_bar_action());
auto& help_menu = m_menubar->add_menu("Help");
help_menu.add_action(WindowActions::the().about_action());
}
Tab::~Tab()
{
}
void Tab::load(const URL& url)
{
m_html_widget->load(url);
}
void Tab::update_actions()
{
m_go_back_action->set_enabled(m_history.can_go_back());
m_go_forward_action->set_enabled(m_history.can_go_forward());
}
void Tab::update_bookmark_button(const String& url)
{
if (BookmarksBarWidget::the().contains_bookmark(url)) {
m_bookmark_button->set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/star-yellow.png"));
m_bookmark_button->set_tooltip("Remove Bookmark");
} else {
m_bookmark_button->set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/star-contour.png"));
m_bookmark_button->set_tooltip("Add Bookmark");
}
}
void Tab::did_become_active()
{
Web::ResourceLoader::the().on_load_counter_change = [this] {
if (Web::ResourceLoader::the().pending_loads() == 0) {
m_statusbar->set_text("");
return;
}
m_statusbar->set_text(String::format("Loading (%d pending resources...)", Web::ResourceLoader::the().pending_loads()));
};
BookmarksBarWidget::the().on_bookmark_click = [this](auto&, auto& url) {
m_html_widget->load(url);
};
BookmarksBarWidget::the().on_bookmark_hover = [this](auto&, auto& url) {
m_statusbar->set_text(url);
};
BookmarksBarWidget::the().remove_from_parent();
m_toolbar_container->add_child(BookmarksBarWidget::the());
GUI::Application::the().set_menubar(m_menubar);
}
}
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