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++ // Copyright (C) 2019 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ #include "compositor.h"
++ #include "window.h"
++
++ #include <QtWaylandCompositor/QWaylandOutput>
++ #include <QtWaylandCompositor/QWaylandXdgShell>
++ #include <QtWaylandCompositor/QWaylandSeat>
++
++ #include <QOpenGLFunctions>
++
++ QOpenGLTexture *View::getTexture() {
++ if (advance())
++ m_texture = currentBuffer().toOpenGLTexture();
++ return m_texture;
++ }
++
++ void View::setGlobalPosition(const QPoint &position)
++ {
++ if (m_globalPosition == position)
++ return;
++
++ m_globalPosition = position;
++ emit globalPositionChanged();
++ }
++
++ QPoint View::mapToLocal(const QPoint &globalPosition) const
++ {
++ return globalPosition - this->globalPosition();
++ }
++
++ void View::updateAnchoredPosition()
++ {
++ QPoint offset;
++ QSize size = surface()->bufferSize();
++ QSize delta = size - m_lastSize;
++ if (m_anchorEdges & Qt::RightEdge)
++ offset.setX(-delta.width());
++ if (m_anchorEdges & Qt::BottomEdge)
++ offset.setY(-delta.height());
++ setGlobalPosition(globalPosition() + offset);
++ m_lastSize = size;
++ }
++
++ void View::handleResizeMove(const QPoint &delta)
++ {
++ Q_UNUSED(delta);
++ qWarning() << "Resize not implemented for this view";
++ }
++
++ ToplevelView::ToplevelView(QWaylandXdgToplevel *toplevel)
++ : m_toplevel(toplevel)
++ {
++ QWaylandXdgSurface *xdgSurface = toplevel->xdgSurface();
++ setSurface(xdgSurface->surface());
++ connect(toplevel, &QWaylandXdgToplevel::startMove, this, &View::startMove);
++ connect(toplevel, &QWaylandXdgToplevel::startResize, this, [this](QWaylandSeat *, Qt::Edges edges) {
++ m_resize.edges = edges;
++ m_resize.initialSize = m_toplevel->xdgSurface()->windowGeometry().size();
++ Qt::Edges opposite = edges ^ Qt::Edges(0b1111);
++ setAnchorEdges(opposite);
++ emit startResize();
++ });
++ QList<QWaylandXdgToplevel::State> states{QWaylandXdgToplevel::ActivatedState};
++ toplevel->sendConfigure(QSize(0, 0), states);
++ }
++
++ void ToplevelView::handleResizeMove(const QPoint &delta)
++ {
++ QSize newSize = m_toplevel->sizeForResize(m_resize.initialSize, delta, m_resize.edges);
++ m_toplevel->sendResizing(newSize);
++ }
++
++ void ToplevelView::handleResizeRelease()
++ {
++ setAnchorEdges({});
++ m_resize.edges = {};
++ m_resize.initialSize = {};
++ }
++
++ Compositor::~Compositor()
++ {
++ delete m_xdgShell;
++ }
++
++ void Compositor::create()
++ {
++ QWaylandCompositor::create();
++
++ m_xdgShell = new QWaylandXdgShell(this);
++ connect(m_xdgShell, &QWaylandXdgShell::toplevelCreated, this, &Compositor::handleXdgToplevelCreated);
++ }
++
++ View *Compositor::viewAt(const QPoint &position)
++ {
++ // Since views are stored in painting order (back to front), we have to iterate backwards
++ // to find the topmost view at the given point
++ for (auto it = m_views.crbegin(); it != m_views.crend(); ++it) {
++ View *view = *it;
++ if (view->globalGeometry().contains(position))
++ return view;
++ }
++ return nullptr;
++ }
++
++ void Compositor::raise(View *view)
++ {
++ m_views.removeAll(view);
++ m_views << view;
++ defaultSeat()->setKeyboardFocus(view->surface());
++ triggerRender();
++ }
++
++ void Compositor::handleMousePress(const QPoint &position, Qt::MouseButton button)
++ {
++ if (m_grab.state == Grab::None) {
++ m_grab.view = viewAt(position);
++ if (m_grab.view) {
++ m_grab.state = Grab::Input;
++ m_grab.startGlobalPosition = position;
++ m_grab.startLocalPosition = m_grab.view->mapToLocal(position);
++ raise(m_grab.view);
++ }
++ }
++
++ switch (m_grab.state) {
++ case Grab::Input: {
++ auto *seat = defaultSeat();
++ seat->sendMouseMoveEvent(m_grab.view, m_grab.view->mapToLocal(position));
++ seat->sendMousePressEvent(button);
++ break;
++ }
++ case Grab::Move:
++ case Grab::Resize:
++ case Grab::None:
++ break;
++ }
++ }
++
++ void Compositor::handleMouseRelease(const QPoint &position, Qt::MouseButton button, Qt::MouseButtons buttons)
++ {
++ auto *seat = defaultSeat();
++
++ switch (m_grab.state) {
++ case Grab::Input:
++ seat->sendMouseMoveEvent(m_grab.view, m_grab.view->mapToLocal(position));
++ seat->sendMouseReleaseEvent(button);
++ if (buttons == Qt::NoButton) {
++ View *newView = viewAt(position);
++ if (newView != m_grab.view) {
++ seat->setMouseFocus(newView);
++ if (newView)
++ seat->sendMouseMoveEvent(newView, newView->mapToLocal(position));
++ }
++ m_grab.view = nullptr;
++ m_grab.state = Grab::None;
++ }
++ break;
++ case Grab::Move:
++ case Grab::Resize:
++ m_grab.state = Grab::None;
++ m_grab.view = nullptr;
++ if (View *view = viewAt(position))
++ seat->sendMouseMoveEvent(view, view->mapToLocal(position));
++ break;
++ case Grab::None:
++ if (View *view = viewAt(position))
++ seat->sendMouseMoveEvent(view, view->mapToLocal(position));
++ break;
++ }
++ }
++
++ void Compositor::handleMouseMove(const QPoint &position)
++ {
++ switch (m_grab.state) {
++ case Grab::Input:
++ defaultSeat()->sendMouseMoveEvent(m_grab.view, m_grab.view->mapToLocal(position));
++ break;
++ case Grab::None:
++ if (View *view = viewAt(position))
++ defaultSeat()->sendMouseMoveEvent(view, view->mapToLocal(position));
++ break;
++ case Grab::Resize:
++ m_grab.view->handleResizeMove(position - m_grab.startGlobalPosition);
++ break;
++ case Grab::Move:
++ m_grab.view->setGlobalPosition(position - m_grab.startLocalPosition);
++ break;
++ }
++ }
++
++ void Compositor::handleMouseWheel(Qt::Orientation orientation, int delta)
++ {
++ defaultSeat()->sendMouseWheelEvent(orientation, delta);
++ }
++
++ void Compositor::handleKeyPress(quint32 nativeScanCode)
++ {
++ defaultSeat()->sendKeyPressEvent(nativeScanCode);
++ }
++
++ void Compositor::handleKeyRelease(quint32 nativeScanCode)
++ {
++ defaultSeat()->sendKeyReleaseEvent(nativeScanCode);
++ }
++
++ void Compositor::handleXdgToplevelCreated(QWaylandXdgToplevel *toplevel, QWaylandXdgSurface *xdgSurface)
++ {
++ Q_UNUSED(xdgSurface);
++ auto *view = new ToplevelView(toplevel);
++ addView(view);
++ }
++
++ void Compositor::addView(View *view)
++ {
++ view->setOutput(outputFor(m_window));
++ m_views << view;
++ connect(view, &QWaylandView::surfaceDestroyed, this, &Compositor::handleViewSurfaceDestroyed);
++ connect(view, &View::globalPositionChanged, this, &Compositor::triggerRender);
++ connect(view->surface(), &QWaylandSurface::redraw, this, &Compositor::triggerRender);
++ connect(view, &View::startMove, this, [this, view](){
++ m_grab.view = view;
++ m_grab.state = Grab::Move;
++ });
++ connect(view, &View::startResize, this, [this, view]() {
++ m_grab.view = view;
++ m_grab.state = Grab::Resize;
++ });
++ }
++
++ void Compositor::handleViewSurfaceDestroyed()
++ {
++ auto *view = qobject_cast<ToplevelView*>(sender());
++ m_views.removeAll(view);
++ delete view;
++ triggerRender();
++ }
++
++ void Compositor::triggerRender()
++ {
++ m_window->requestUpdate();
++ }