405 lines
11 KiB
C++
405 lines
11 KiB
C++
#include "Cursor.h"
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#include "WindowServer.h"
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#include <BAN/Debug.h>
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#include <LibGUI/Window.h>
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#include <LibInput/KeyboardLayout.h>
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#include <stdlib.h>
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#include <sys/banan-os.h>
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#include <sys/mman.h>
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#include <sys/socket.h>
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void WindowServer::on_window_packet(int fd, LibGUI::WindowPacket packet)
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{
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switch (packet.type)
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{
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case LibGUI::WindowPacketType::CreateWindow:
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{
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// FIXME: This should be probably allowed
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for (auto& window : m_client_windows)
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{
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if (window->client_fd() == fd)
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{
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dwarnln("client {} tried to create window while already owning a window", fd);
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return;
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}
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}
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const size_t window_fb_bytes = packet.create.width * packet.create.height * 4;
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long smo_key = smo_create(window_fb_bytes, PROT_READ | PROT_WRITE);
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if (smo_key == -1)
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{
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dwarnln("smo_create: {}", strerror(errno));
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break;
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}
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Rectangle window_area {
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static_cast<int32_t>((m_framebuffer.width - packet.create.width) / 2),
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static_cast<int32_t>((m_framebuffer.height - packet.create.height) / 2),
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static_cast<int32_t>(packet.create.width),
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static_cast<int32_t>(packet.create.height)
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};
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packet.create.title[sizeof(packet.create.title) - 1] = '\0';
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// Window::Window(int fd, Rectangle area, long smo_key, BAN::StringView title, const LibFont::Font& font)
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auto window = MUST(BAN::RefPtr<Window>::create(
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fd,
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window_area,
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smo_key,
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packet.create.title,
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m_font
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));
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MUST(m_client_windows.push_back(window));
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set_focused_window(window);
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LibGUI::WindowCreateResponse response;
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response.framebuffer_smo_key = smo_key;
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if (send(window->client_fd(), &response, sizeof(response), 0) != sizeof(response))
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{
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dwarnln("send: {}", strerror(errno));
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break;
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}
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break;
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}
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case LibGUI::WindowPacketType::Invalidate:
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{
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if (packet.invalidate.width == 0 || packet.invalidate.height == 0)
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break;
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BAN::RefPtr<Window> target_window;
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for (auto& window : m_client_windows)
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{
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if (window->client_fd() == fd)
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{
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target_window = window;
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break;
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}
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}
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if (!target_window)
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{
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dwarnln("client {} tried to invalidate window while not owning a window", fd);
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break;
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}
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const int32_t br_x = packet.invalidate.x + packet.invalidate.width - 1;
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const int32_t br_y = packet.invalidate.y + packet.invalidate.height - 1;
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if (!target_window->client_size().contains({ br_x, br_y }))
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{
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dwarnln("Invalid Invalidate packet parameters");
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break;
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}
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invalidate({
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target_window->client_x() + static_cast<int32_t>(packet.invalidate.x),
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target_window->client_y() + static_cast<int32_t>(packet.invalidate.y),
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static_cast<int32_t>(packet.invalidate.width),
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static_cast<int32_t>(packet.invalidate.height),
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});
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break;
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}
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default:
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ASSERT_NOT_REACHED();
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}
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}
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void WindowServer::on_key_event(LibInput::KeyEvent event)
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{
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// Mod key is not passed to clients
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if (event.key == LibInput::Key::Super)
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{
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m_is_mod_key_held = event.pressed();
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return;
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}
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// Quick hack to stop the window server
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if (event.pressed() && event.key == LibInput::Key::Escape)
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{
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m_is_stopped = true;
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return;
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}
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// Kill window with mod+Q
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if (m_is_mod_key_held && event.pressed() && event.key == LibInput::Key::Q)
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{
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if (m_focused_window)
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remove_client_fd(m_focused_window->client_fd());
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return;
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}
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if (m_focused_window)
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{
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LibGUI::EventPacket packet;
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packet.type = LibGUI::EventPacket::Type::KeyEvent;
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packet.key_event = event;
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send(m_focused_window->client_fd(), &packet, sizeof(packet), 0);
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}
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}
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void WindowServer::on_mouse_button(LibInput::MouseButtonEvent event)
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{
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BAN::RefPtr<Window> target_window;
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for (size_t i = m_client_windows.size(); i > 0; i--)
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{
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if (m_client_windows[i - 1]->full_area().contains(m_cursor))
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{
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target_window = m_client_windows[i - 1];
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break;
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}
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}
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// Ignore mouse button events which are not on top of a window
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if (!target_window)
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return;
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set_focused_window(target_window);
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// Handle window moving when mod key is held or mouse press on title bar
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const bool can_start_move = m_is_mod_key_held || target_window->title_text_area().contains(m_cursor);
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if (event.pressed && event.button == LibInput::MouseButton::Left && !m_is_moving_window && can_start_move)
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m_is_moving_window = true;
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else if (m_is_moving_window && !event.pressed)
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m_is_moving_window = false;
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else if (!event.pressed && event.button == LibInput::MouseButton::Left && target_window->close_button_area().contains(m_cursor))
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{
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// NOTE: we always have target window if code reaches here
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LibGUI::EventPacket packet;
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packet.type = LibGUI::EventPacket::Type::CloseWindow;
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send(m_focused_window->client_fd(), &packet, sizeof(packet), 0);
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}
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else if (target_window->client_area().contains(m_cursor))
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{
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// NOTE: we always have target window if code reaches here
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LibGUI::EventPacket packet;
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packet.type = LibGUI::EventPacket::Type::MouseButtonEvent;
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packet.mouse_button_event.button = event.button;
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packet.mouse_button_event.pressed = event.pressed;
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packet.mouse_button_event.x = m_cursor.x - m_focused_window->client_x();
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packet.mouse_button_event.y = m_cursor.y - m_focused_window->client_y();
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send(m_focused_window->client_fd(), &packet, sizeof(packet), 0);
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}
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}
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void WindowServer::on_mouse_move(LibInput::MouseMoveEvent event)
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{
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const int32_t new_x = BAN::Math::clamp(m_cursor.x + event.rel_x, 0, m_framebuffer.width);
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const int32_t new_y = BAN::Math::clamp(m_cursor.y - event.rel_y, 0, m_framebuffer.height);
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event.rel_x = new_x - m_cursor.x;
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event.rel_y = new_y - m_cursor.y;
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if (event.rel_x == 0 && event.rel_y == 0)
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return;
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auto old_cursor = cursor_area();
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m_cursor.x = new_x;
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m_cursor.y = new_y;
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auto new_cursor = cursor_area();
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invalidate(old_cursor);
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invalidate(new_cursor);
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// TODO: Really no need to loop over every window
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for (auto& window : m_client_windows)
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{
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auto title_bar = window->title_bar_area();
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if (title_bar.get_overlap(old_cursor).has_value() || title_bar.get_overlap(new_cursor).has_value())
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invalidate(title_bar);
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}
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if (m_is_moving_window)
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{
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auto old_window = m_focused_window->full_area();
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m_focused_window->set_position({
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m_focused_window->client_x() + event.rel_x,
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m_focused_window->client_y() + event.rel_y,
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});
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auto new_window = m_focused_window->full_area();
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invalidate(old_window);
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invalidate(new_window);
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return;
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}
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if (m_focused_window)
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{
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LibGUI::EventPacket packet;
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packet.type = LibGUI::EventPacket::Type::MouseMoveEvent;
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packet.mouse_move_event.x = m_cursor.x - m_focused_window->client_x();
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packet.mouse_move_event.y = m_cursor.y - m_focused_window->client_y();
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send(m_focused_window->client_fd(), &packet, sizeof(packet), 0);
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}
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}
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void WindowServer::on_mouse_scroll(LibInput::MouseScrollEvent event)
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{
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if (m_focused_window)
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{
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LibGUI::EventPacket packet;
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packet.type = LibGUI::EventPacket::Type::MouseScrollEvent;
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packet.mouse_scroll_event = event;
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send(m_focused_window->client_fd(), &packet, sizeof(packet), 0);
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}
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}
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void WindowServer::set_focused_window(BAN::RefPtr<Window> window)
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{
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if (m_focused_window == window)
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return;
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for (size_t i = m_client_windows.size(); i > 0; i--)
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{
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if (m_client_windows[i - 1] == window)
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{
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m_focused_window = window;
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m_client_windows.remove(i - 1);
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MUST(m_client_windows.push_back(window));
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invalidate(window->full_area());
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break;
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}
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}
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}
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void WindowServer::invalidate(Rectangle area)
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{
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auto fb_overlap = area.get_overlap(m_framebuffer.area());
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if (!fb_overlap.has_value())
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return;
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area = fb_overlap.release_value();
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for (int32_t y = area.y; y < area.y + area.height; y++)
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memset(&m_framebuffer.mmap[y * m_framebuffer.width + area.x], 0, area.width * 4);
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for (auto& pwindow : m_client_windows)
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{
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auto& window = *pwindow;
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// window title bar
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if (auto overlap = window.title_bar_area().get_overlap(area); overlap.has_value())
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{
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for (int32_t y_off = 0; y_off < overlap->height; y_off++)
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{
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for (int32_t x_off = 0; x_off < overlap->width; x_off++)
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{
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uint32_t pixel = window.title_bar_pixel(
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overlap->x + x_off,
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overlap->y + y_off,
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m_cursor
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);
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m_framebuffer.mmap[(overlap->y + y_off) * m_framebuffer.width + overlap->x + x_off] = pixel;
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}
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}
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}
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// window client area
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if (auto overlap = window.client_area().get_overlap(area); overlap.has_value())
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{
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const int32_t src_x = overlap->x - window.client_x();
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const int32_t src_y = overlap->y - window.client_y();
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for (int32_t y_off = 0; y_off < overlap->height; y_off++)
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{
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memcpy(
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&m_framebuffer.mmap[(overlap->y + y_off) * m_framebuffer.width + overlap->x],
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&window.framebuffer()[(src_y + y_off) * window.client_width() + src_x],
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overlap->width * 4
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);
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}
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}
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}
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auto cursor = cursor_area();
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if (auto overlap = cursor.get_overlap(area); overlap.has_value())
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{
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for (int32_t y_off = 0; y_off < overlap->height; y_off++)
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{
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for (int32_t x_off = 0; x_off < overlap->width; x_off++)
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{
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const int32_t rel_x = overlap->x - m_cursor.x + x_off;
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const int32_t rel_y = overlap->y - m_cursor.y + y_off;
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const uint32_t offset = (rel_y * s_cursor_width + rel_x) * 4;
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uint32_t r = (((s_cursor_data[offset + 0] - 33) << 2) | ((s_cursor_data[offset + 1] - 33) >> 4));
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uint32_t g = ((((s_cursor_data[offset + 1] - 33) & 0xF) << 4) | ((s_cursor_data[offset + 2] - 33) >> 2));
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uint32_t b = ((((s_cursor_data[offset + 2] - 33) & 0x3) << 6) | ((s_cursor_data[offset + 3] - 33)));
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uint32_t color = (r << 16) | (g << 8) | b;
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if (color != 0xFF00FF)
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m_framebuffer.mmap[(overlap->y + y_off) * m_framebuffer.width + (overlap->x + x_off)] = color;
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}
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}
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}
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uintptr_t mmap_start = reinterpret_cast<uintptr_t>(m_framebuffer.mmap) + area.y * m_framebuffer.width * 4;
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uintptr_t mmap_end = mmap_start + (area.height + 1) * m_framebuffer.width * 4;
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mmap_start &= ~(uintptr_t)0xFFF;
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msync(reinterpret_cast<void*>(mmap_start), mmap_end - mmap_start, MS_SYNC);
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}
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Rectangle WindowServer::cursor_area() const
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{
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return { m_cursor.x, m_cursor.y, s_cursor_width, s_cursor_height };
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}
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void WindowServer::add_client_fd(int fd)
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{
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MUST(m_client_fds.push_back(fd));
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}
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void WindowServer::remove_client_fd(int fd)
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{
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for (size_t i = 0; i < m_client_fds.size(); i++)
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{
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if (m_client_fds[i] == fd)
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{
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m_client_fds.remove(i);
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break;
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}
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}
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for (size_t i = 0; i < m_client_windows.size(); i++)
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{
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auto window = m_client_windows[i];
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if (window->client_fd() == fd)
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{
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auto window_area = window->full_area();
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m_client_windows.remove(i);
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invalidate(window_area);
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if (window == m_focused_window)
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{
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m_focused_window = nullptr;
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if (!m_client_windows.empty())
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set_focused_window(m_client_windows.back());
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}
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break;
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}
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}
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m_deleted_window = true;
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}
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int WindowServer::get_client_fds(fd_set& fds) const
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{
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int max_fd = 0;
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for (int fd : m_client_fds)
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{
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FD_SET(fd, &fds);
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max_fd = BAN::Math::max(max_fd, fd);
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}
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return max_fd;
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}
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void WindowServer::for_each_client_fd(const BAN::Function<BAN::Iteration(int)>& callback)
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{
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m_deleted_window = false;
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for (int fd : m_client_fds)
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{
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if (m_deleted_window)
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break;
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callback(fd);
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}
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}
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