mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-04-25 22:08:59 +00:00
3ce80bec97
This allows windows/widgets to learn when something is being dragged over them. They can then repaint themselves somehow to indicate that they are willing to accept a drop. Currently this is piggybacking somewhat on the mouse event mechanism in WindowServer. I'm not sure that's the best design but it seemed easier to do it this way right now.
664 lines
22 KiB
C++
664 lines
22 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/HashMap.h>
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#include <AK/JsonObject.h>
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#include <AK/NeverDestroyed.h>
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#include <AK/SharedBuffer.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGUI/Action.h>
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#include <LibGUI/Application.h>
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#include <LibGUI/Event.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/Widget.h>
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#include <LibGUI/Window.h>
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#include <LibGUI/WindowServerConnection.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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//#define UPDATE_COALESCING_DEBUG
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namespace GUI {
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static NeverDestroyed<HashTable<Window*>> all_windows;
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static NeverDestroyed<HashMap<int, Window*>> reified_windows;
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Window* Window::from_window_id(int window_id)
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{
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auto it = reified_windows->find(window_id);
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if (it != reified_windows->end())
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return (*it).value;
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return nullptr;
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}
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Window::Window(Core::Object* parent)
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: Core::Object(parent)
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{
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all_windows->set(this);
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m_rect_when_windowless = { 100, 400, 140, 140 };
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m_title_when_windowless = "GWindow";
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}
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Window::~Window()
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{
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all_windows->remove(this);
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hide();
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}
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void Window::close()
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{
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hide();
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}
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void Window::move_to_front()
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{
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if (!m_window_id)
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return;
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WindowServerConnection::the().send_sync<Messages::WindowServer::MoveWindowToFront>(m_window_id);
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}
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void Window::show()
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{
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if (m_window_id)
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return;
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auto response = WindowServerConnection::the().send_sync<Messages::WindowServer::CreateWindow>(
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m_rect_when_windowless,
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m_has_alpha_channel,
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m_modal,
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m_minimizable,
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m_resizable,
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m_fullscreen,
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m_show_titlebar,
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m_opacity_when_windowless,
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m_base_size,
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m_size_increment,
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(i32)m_window_type,
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m_title_when_windowless);
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m_window_id = response->window_id();
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apply_icon();
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reified_windows->set(m_window_id, this);
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Application::the().did_create_window({});
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update();
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}
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void Window::hide()
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{
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if (!m_window_id)
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return;
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reified_windows->remove(m_window_id);
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WindowServerConnection::the().send_sync<Messages::WindowServer::DestroyWindow>(m_window_id);
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m_window_id = 0;
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m_pending_paint_event_rects.clear();
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m_back_bitmap = nullptr;
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m_front_bitmap = nullptr;
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bool app_has_visible_windows = false;
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for (auto& window : *all_windows) {
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if (window->is_visible()) {
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app_has_visible_windows = true;
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break;
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}
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}
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if (!app_has_visible_windows)
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Application::the().did_delete_last_window({});
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}
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void Window::set_title(const StringView& title)
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{
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m_title_when_windowless = title;
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if (!m_window_id)
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return;
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WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowTitle>(m_window_id, title);
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}
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String Window::title() const
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{
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if (!m_window_id)
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return m_title_when_windowless;
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return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWindowTitle>(m_window_id)->title();
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}
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Gfx::Rect Window::rect() const
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{
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if (!m_window_id)
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return m_rect_when_windowless;
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return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWindowRect>(m_window_id)->rect();
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}
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void Window::set_rect(const Gfx::Rect& a_rect)
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{
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m_rect_when_windowless = a_rect;
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if (!m_window_id) {
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if (m_main_widget)
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m_main_widget->resize(m_rect_when_windowless.size());
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return;
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}
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WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowRect>(m_window_id, a_rect);
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if (m_back_bitmap && m_back_bitmap->size() != a_rect.size())
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m_back_bitmap = nullptr;
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if (m_front_bitmap && m_front_bitmap->size() != a_rect.size())
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m_front_bitmap = nullptr;
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if (m_main_widget)
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m_main_widget->resize(a_rect.size());
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}
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void Window::set_window_type(WindowType window_type)
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{
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m_window_type = window_type;
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}
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void Window::set_override_cursor(StandardCursor cursor)
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{
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if (!m_window_id)
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return;
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WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowOverrideCursor>(m_window_id, (u32)cursor);
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}
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void Window::event(Core::Event& event)
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{
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if (event.type() == Event::Drop) {
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auto& drop_event = static_cast<DropEvent&>(event);
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if (!m_main_widget)
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return;
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auto result = m_main_widget->hit_test(drop_event.position());
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auto local_event = make<DropEvent>(result.local_position, drop_event.text(), drop_event.data_type(), drop_event.data());
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ASSERT(result.widget);
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return result.widget->dispatch_event(*local_event, this);
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}
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if (event.type() == Event::MouseUp || event.type() == Event::MouseDown || event.type() == Event::MouseDoubleClick || event.type() == Event::MouseMove || event.type() == Event::MouseWheel) {
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auto& mouse_event = static_cast<MouseEvent&>(event);
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if (m_global_cursor_tracking_widget) {
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auto window_relative_rect = m_global_cursor_tracking_widget->window_relative_rect();
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Gfx::Point local_point { mouse_event.x() - window_relative_rect.x(), mouse_event.y() - window_relative_rect.y() };
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auto local_event = make<MouseEvent>((Event::Type)event.type(), local_point, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers(), mouse_event.wheel_delta());
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m_global_cursor_tracking_widget->dispatch_event(*local_event, this);
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return;
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}
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if (m_automatic_cursor_tracking_widget) {
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auto window_relative_rect = m_automatic_cursor_tracking_widget->window_relative_rect();
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Gfx::Point local_point { mouse_event.x() - window_relative_rect.x(), mouse_event.y() - window_relative_rect.y() };
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auto local_event = make<MouseEvent>((Event::Type)event.type(), local_point, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers(), mouse_event.wheel_delta());
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m_automatic_cursor_tracking_widget->dispatch_event(*local_event, this);
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if (mouse_event.buttons() == 0)
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m_automatic_cursor_tracking_widget = nullptr;
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return;
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}
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if (!m_main_widget)
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return;
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auto result = m_main_widget->hit_test(mouse_event.position());
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auto local_event = make<MouseEvent>((Event::Type)event.type(), result.local_position, mouse_event.buttons(), mouse_event.button(), mouse_event.modifiers(), mouse_event.wheel_delta());
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ASSERT(result.widget);
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set_hovered_widget(result.widget);
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if (mouse_event.buttons() != 0 && !m_automatic_cursor_tracking_widget)
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m_automatic_cursor_tracking_widget = result.widget->make_weak_ptr();
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if (result.widget != m_global_cursor_tracking_widget.ptr())
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return result.widget->dispatch_event(*local_event, this);
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return;
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}
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if (event.type() == Event::MultiPaint) {
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if (!m_window_id)
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return;
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if (!m_main_widget)
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return;
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auto& paint_event = static_cast<MultiPaintEvent&>(event);
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auto rects = paint_event.rects();
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ASSERT(!rects.is_empty());
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if (m_back_bitmap && m_back_bitmap->size() != paint_event.window_size()) {
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// Eagerly discard the backing store if we learn from this paint event that it needs to be bigger.
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// Otherwise we would have to wait for a resize event to tell us. This way we don't waste the
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// effort on painting into an undersized bitmap that will be thrown away anyway.
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m_back_bitmap = nullptr;
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}
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bool created_new_backing_store = !m_back_bitmap;
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if (!m_back_bitmap) {
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m_back_bitmap = create_backing_bitmap(paint_event.window_size());
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} else if (m_double_buffering_enabled) {
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bool still_has_pixels = m_back_bitmap->shared_buffer()->set_nonvolatile();
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if (!still_has_pixels) {
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m_back_bitmap = create_backing_bitmap(paint_event.window_size());
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created_new_backing_store = true;
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}
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}
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auto rect = rects.first();
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if (rect.is_empty() || created_new_backing_store) {
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rects.clear();
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rects.append({ {}, paint_event.window_size() });
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}
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for (auto& rect : rects)
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m_main_widget->dispatch_event(*make<PaintEvent>(rect), this);
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if (m_double_buffering_enabled)
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flip(rects);
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else if (created_new_backing_store)
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set_current_backing_bitmap(*m_back_bitmap, true);
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if (m_window_id) {
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Vector<Gfx::Rect> rects_to_send;
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for (auto& r : rects)
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rects_to_send.append(r);
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WindowServerConnection::the().post_message(Messages::WindowServer::DidFinishPainting(m_window_id, rects_to_send));
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}
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return;
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}
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if (event.type() == Event::KeyUp || event.type() == Event::KeyDown) {
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if (m_focused_widget)
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return m_focused_widget->dispatch_event(event, this);
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if (m_main_widget)
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return m_main_widget->dispatch_event(event, this);
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return;
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}
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if (event.type() == Event::WindowBecameActive || event.type() == Event::WindowBecameInactive) {
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m_is_active = event.type() == Event::WindowBecameActive;
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if (m_main_widget)
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m_main_widget->dispatch_event(event, this);
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if (m_focused_widget)
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m_focused_widget->update();
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return;
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}
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if (event.type() == Event::WindowCloseRequest) {
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if (on_close_request) {
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if (on_close_request() == Window::CloseRequestDecision::StayOpen)
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return;
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}
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close();
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return;
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}
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if (event.type() == Event::WindowLeft) {
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set_hovered_widget(nullptr);
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return;
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}
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if (event.type() == Event::Resize) {
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auto new_size = static_cast<ResizeEvent&>(event).size();
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if (m_back_bitmap && m_back_bitmap->size() != new_size)
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m_back_bitmap = nullptr;
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if (!m_pending_paint_event_rects.is_empty()) {
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m_pending_paint_event_rects.clear_with_capacity();
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m_pending_paint_event_rects.append({ {}, new_size });
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}
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m_rect_when_windowless = { {}, new_size };
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m_main_widget->set_relative_rect({ {}, new_size });
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return;
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}
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if (event.type() > Event::__Begin_WM_Events && event.type() < Event::__End_WM_Events)
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return wm_event(static_cast<WMEvent&>(event));
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if (event.type() == Event::DragMove) {
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if (!m_main_widget)
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return;
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auto& drag_event = static_cast<DragEvent&>(event);
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auto result = m_main_widget->hit_test(drag_event.position());
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auto local_event = make<DragEvent>(static_cast<Event::Type>(drag_event.type()), result.local_position, drag_event.data_type());
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ASSERT(result.widget);
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return result.widget->dispatch_event(*local_event, this);
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}
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Core::Object::event(event);
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}
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bool Window::is_visible() const
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{
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return m_window_id != 0;
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}
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void Window::update()
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{
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update({ 0, 0, width(), height() });
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}
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void Window::update(const Gfx::Rect& a_rect)
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{
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if (!m_window_id)
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return;
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for (auto& pending_rect : m_pending_paint_event_rects) {
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if (pending_rect.contains(a_rect)) {
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#ifdef UPDATE_COALESCING_DEBUG
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dbgprintf("Ignoring %s since it's contained by pending rect %s\n", a_rect.to_string().characters(), pending_rect.to_string().characters());
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#endif
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return;
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}
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}
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if (m_pending_paint_event_rects.is_empty()) {
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deferred_invoke([this](auto&) {
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auto rects = move(m_pending_paint_event_rects);
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if (rects.is_empty())
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return;
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Vector<Gfx::Rect> rects_to_send;
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for (auto& r : rects)
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rects_to_send.append(r);
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WindowServerConnection::the().post_message(Messages::WindowServer::InvalidateRect(m_window_id, rects_to_send));
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});
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}
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m_pending_paint_event_rects.append(a_rect);
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}
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void Window::set_main_widget(Widget* widget)
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{
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if (m_main_widget == widget)
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return;
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if (m_main_widget)
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remove_child(*m_main_widget);
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m_main_widget = widget;
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if (m_main_widget) {
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add_child(*widget);
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auto new_window_rect = rect();
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if (m_main_widget->horizontal_size_policy() == SizePolicy::Fixed)
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new_window_rect.set_width(m_main_widget->preferred_size().width());
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if (m_main_widget->vertical_size_policy() == SizePolicy::Fixed)
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new_window_rect.set_height(m_main_widget->preferred_size().height());
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set_rect(new_window_rect);
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m_main_widget->set_relative_rect({ {}, new_window_rect.size() });
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m_main_widget->set_window(this);
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if (m_main_widget->accepts_focus())
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m_main_widget->set_focus(true);
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}
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update();
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}
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void Window::set_focused_widget(Widget* widget)
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{
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if (m_focused_widget == widget)
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return;
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if (m_focused_widget) {
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Core::EventLoop::current().post_event(*m_focused_widget, make<Event>(Event::FocusOut));
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m_focused_widget->update();
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}
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m_focused_widget = widget ? widget->make_weak_ptr() : nullptr;
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if (m_focused_widget) {
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Core::EventLoop::current().post_event(*m_focused_widget, make<Event>(Event::FocusIn));
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m_focused_widget->update();
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}
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}
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void Window::set_global_cursor_tracking_widget(Widget* widget)
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{
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if (widget == m_global_cursor_tracking_widget)
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return;
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m_global_cursor_tracking_widget = widget ? widget->make_weak_ptr() : nullptr;
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}
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void Window::set_automatic_cursor_tracking_widget(Widget* widget)
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{
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if (widget == m_automatic_cursor_tracking_widget)
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return;
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m_automatic_cursor_tracking_widget = widget ? widget->make_weak_ptr() : nullptr;
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}
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void Window::set_has_alpha_channel(bool value)
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{
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if (m_has_alpha_channel == value)
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return;
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m_has_alpha_channel = value;
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if (!m_window_id)
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return;
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m_pending_paint_event_rects.clear();
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m_back_bitmap = nullptr;
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m_front_bitmap = nullptr;
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WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowHasAlphaChannel>(m_window_id, value);
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update();
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}
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void Window::set_double_buffering_enabled(bool value)
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{
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ASSERT(!m_window_id);
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m_double_buffering_enabled = value;
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}
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void Window::set_opacity(float opacity)
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{
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m_opacity_when_windowless = opacity;
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if (!m_window_id)
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return;
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WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowOpacity>(m_window_id, opacity);
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}
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void Window::set_hovered_widget(Widget* widget)
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{
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if (widget == m_hovered_widget)
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return;
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if (m_hovered_widget)
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Core::EventLoop::current().post_event(*m_hovered_widget, make<Event>(Event::Leave));
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m_hovered_widget = widget ? widget->make_weak_ptr() : nullptr;
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if (m_hovered_widget)
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Core::EventLoop::current().post_event(*m_hovered_widget, make<Event>(Event::Enter));
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}
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void Window::set_current_backing_bitmap(Gfx::Bitmap& bitmap, bool flush_immediately)
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{
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WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowBackingStore>(m_window_id, 32, bitmap.pitch(), bitmap.shared_buffer_id(), bitmap.has_alpha_channel(), bitmap.size(), flush_immediately);
|
|
}
|
|
|
|
void Window::flip(const Vector<Gfx::Rect, 32>& dirty_rects)
|
|
{
|
|
swap(m_front_bitmap, m_back_bitmap);
|
|
|
|
set_current_backing_bitmap(*m_front_bitmap);
|
|
|
|
if (!m_back_bitmap || m_back_bitmap->size() != m_front_bitmap->size()) {
|
|
m_back_bitmap = create_backing_bitmap(m_front_bitmap->size());
|
|
memcpy(m_back_bitmap->scanline(0), m_front_bitmap->scanline(0), m_front_bitmap->size_in_bytes());
|
|
m_back_bitmap->shared_buffer()->set_volatile();
|
|
return;
|
|
}
|
|
|
|
// Copy whatever was painted from the front to the back.
|
|
Painter painter(*m_back_bitmap);
|
|
for (auto& dirty_rect : dirty_rects)
|
|
painter.blit(dirty_rect.location(), *m_front_bitmap, dirty_rect);
|
|
|
|
m_back_bitmap->shared_buffer()->set_volatile();
|
|
}
|
|
|
|
NonnullRefPtr<Gfx::Bitmap> Window::create_shared_bitmap(Gfx::Bitmap::Format format, const Gfx::Size& size)
|
|
{
|
|
ASSERT(WindowServerConnection::the().server_pid());
|
|
ASSERT(!size.is_empty());
|
|
size_t pitch = round_up_to_power_of_two(size.width() * sizeof(Gfx::RGBA32), 16);
|
|
size_t size_in_bytes = size.height() * pitch;
|
|
auto shared_buffer = SharedBuffer::create_with_size(size_in_bytes);
|
|
ASSERT(shared_buffer);
|
|
shared_buffer->share_with(WindowServerConnection::the().server_pid());
|
|
return Gfx::Bitmap::create_with_shared_buffer(format, *shared_buffer, size);
|
|
}
|
|
|
|
NonnullRefPtr<Gfx::Bitmap> Window::create_backing_bitmap(const Gfx::Size& size)
|
|
{
|
|
auto format = m_has_alpha_channel ? Gfx::Bitmap::Format::RGBA32 : Gfx::Bitmap::Format::RGB32;
|
|
return create_shared_bitmap(format, size);
|
|
}
|
|
|
|
void Window::set_modal(bool modal)
|
|
{
|
|
ASSERT(!m_window_id);
|
|
m_modal = modal;
|
|
}
|
|
|
|
void Window::wm_event(WMEvent&)
|
|
{
|
|
}
|
|
|
|
void Window::set_icon(const Gfx::Bitmap* icon)
|
|
{
|
|
if (m_icon == icon)
|
|
return;
|
|
|
|
m_icon = create_shared_bitmap(Gfx::Bitmap::Format::RGBA32, icon->size());
|
|
{
|
|
Painter painter(*m_icon);
|
|
painter.blit({ 0, 0 }, *icon, icon->rect());
|
|
}
|
|
|
|
apply_icon();
|
|
}
|
|
|
|
void Window::apply_icon()
|
|
{
|
|
if (!m_icon)
|
|
return;
|
|
|
|
if (!m_window_id)
|
|
return;
|
|
|
|
int rc = seal_shared_buffer(m_icon->shared_buffer_id());
|
|
ASSERT(rc == 0);
|
|
|
|
rc = share_buffer_globally(m_icon->shared_buffer_id());
|
|
ASSERT(rc == 0);
|
|
|
|
static bool has_set_process_icon;
|
|
if (!has_set_process_icon)
|
|
set_process_icon(m_icon->shared_buffer_id());
|
|
|
|
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowIconBitmap>(m_window_id, m_icon->shared_buffer_id(), m_icon->size());
|
|
}
|
|
|
|
void Window::start_wm_resize()
|
|
{
|
|
WindowServerConnection::the().post_message(Messages::WindowServer::WM_StartWindowResize(WindowServerConnection::the().my_client_id(), m_window_id));
|
|
}
|
|
|
|
Vector<Widget*> Window::focusable_widgets() const
|
|
{
|
|
if (!m_main_widget)
|
|
return {};
|
|
|
|
Vector<Widget*> collected_widgets;
|
|
|
|
Function<void(Widget&)> collect_focusable_widgets = [&](auto& widget) {
|
|
if (widget.accepts_focus())
|
|
collected_widgets.append(&widget);
|
|
widget.for_each_child_widget([&](auto& child) {
|
|
if (!child.is_visible())
|
|
return IterationDecision::Continue;
|
|
if (!child.is_enabled())
|
|
return IterationDecision::Continue;
|
|
collect_focusable_widgets(child);
|
|
return IterationDecision::Continue;
|
|
});
|
|
};
|
|
|
|
collect_focusable_widgets(const_cast<Widget&>(*m_main_widget));
|
|
return collected_widgets;
|
|
}
|
|
|
|
void Window::save_to(AK::JsonObject& json)
|
|
{
|
|
json.set("title", title());
|
|
json.set("visible", is_visible());
|
|
json.set("active", is_active());
|
|
json.set("minimizable", is_minimizable());
|
|
json.set("resizable", is_resizable());
|
|
json.set("fullscreen", is_fullscreen());
|
|
json.set("rect", rect().to_string());
|
|
json.set("base_size", base_size().to_string());
|
|
json.set("size_increment", size_increment().to_string());
|
|
Core::Object::save_to(json);
|
|
}
|
|
|
|
void Window::set_fullscreen(bool fullscreen)
|
|
{
|
|
if (m_fullscreen == fullscreen)
|
|
return;
|
|
m_fullscreen = fullscreen;
|
|
if (!m_window_id)
|
|
return;
|
|
WindowServerConnection::the().send_sync<Messages::WindowServer::SetFullscreen>(m_window_id, fullscreen);
|
|
}
|
|
|
|
void Window::schedule_relayout()
|
|
{
|
|
if (m_layout_pending)
|
|
return;
|
|
m_layout_pending = true;
|
|
deferred_invoke([this](auto&) {
|
|
if (main_widget())
|
|
main_widget()->do_layout();
|
|
update();
|
|
m_layout_pending = false;
|
|
});
|
|
}
|
|
|
|
void Window::update_all_windows(Badge<WindowServerConnection>)
|
|
{
|
|
for (auto* window : *all_windows) {
|
|
window->update();
|
|
}
|
|
}
|
|
|
|
void Window::notify_state_changed(Badge<WindowServerConnection>, bool minimized, bool occluded)
|
|
{
|
|
m_visible_for_timer_purposes = !minimized && !occluded;
|
|
|
|
// When double buffering is enabled, minimization/occlusion means we can mark the front bitmap volatile (in addition to the back bitmap.)
|
|
// When double buffering is disabled, there is only the back bitmap (which we can now mark volatile!)
|
|
RefPtr<Gfx::Bitmap>& bitmap = m_double_buffering_enabled ? m_front_bitmap : m_back_bitmap;
|
|
if (!bitmap)
|
|
return;
|
|
if (minimized || occluded) {
|
|
bitmap->shared_buffer()->set_volatile();
|
|
} else {
|
|
if (!bitmap->shared_buffer()->set_nonvolatile()) {
|
|
bitmap = nullptr;
|
|
update();
|
|
}
|
|
}
|
|
}
|
|
|
|
Action* Window::action_for_key_event(const KeyEvent& event)
|
|
{
|
|
Shortcut shortcut(event.modifiers(), (KeyCode)event.key());
|
|
Action* found_action = nullptr;
|
|
for_each_child_of_type<Action>([&](auto& action) {
|
|
if (action.shortcut() == shortcut) {
|
|
found_action = &action;
|
|
return IterationDecision::Break;
|
|
}
|
|
return IterationDecision::Continue;
|
|
});
|
|
return found_action;
|
|
}
|
|
|
|
}
|