545 lines
19 KiB
C++
545 lines
19 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2006 Lubos Lunak <l.lunak@kde.org>
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SPDX-FileCopyrightText: 2010 Sebastian Sauer <sebsauer@kdab.com>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "zoom.h"
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// KConfigSkeleton
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#include "zoomconfig.h"
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#if HAVE_ACCESSIBILITY
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#include "accessibilityintegration.h"
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#endif
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#include <QAction>
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#include <QApplication>
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#include <QStyle>
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#include <QVector2D>
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#include <kstandardaction.h>
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#include <KConfigGroup>
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#include <KGlobalAccel>
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#include <KLocalizedString>
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#include <kwinglutils.h>
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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#include <kwinxrenderutils.h>
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#include <xcb/render.h>
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#endif
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namespace KWin
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{
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ZoomEffect::ZoomEffect()
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: Effect()
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, zoom(1)
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, target_zoom(1)
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, polling(false)
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, zoomFactor(1.25)
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, mouseTracking(MouseTrackingProportional)
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, mousePointer(MousePointerScale)
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, focusDelay(350) // in milliseconds
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, imageWidth(0)
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, imageHeight(0)
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, isMouseHidden(false)
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, xMove(0)
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, yMove(0)
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, moveFactor(20.0)
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, lastPresentTime(std::chrono::milliseconds::zero())
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{
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initConfig<ZoomConfig>();
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QAction* a = nullptr;
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a = KStandardAction::zoomIn(this, SLOT(zoomIn()), this);
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Equal);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Equal);
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effects->registerGlobalShortcut(Qt::META + Qt::Key_Equal, a);
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effects->registerAxisShortcut(Qt::ControlModifier | Qt::MetaModifier, PointerAxisDown, a);
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a = KStandardAction::zoomOut(this, SLOT(zoomOut()), this);
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Minus);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Minus);
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effects->registerGlobalShortcut(Qt::META + Qt::Key_Minus, a);
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effects->registerAxisShortcut(Qt::ControlModifier | Qt::MetaModifier, PointerAxisUp, a);
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a = KStandardAction::actualSize(this, SLOT(actualSize()), this);
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_0);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_0);
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effects->registerGlobalShortcut(Qt::META + Qt::Key_0, a);
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a = new QAction(this);
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a->setObjectName(QStringLiteral("MoveZoomLeft"));
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a->setText(i18n("Move Zoomed Area to Left"));
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>());
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>());
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effects->registerGlobalShortcut(QKeySequence(), a);
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connect(a, &QAction::triggered, this, &ZoomEffect::moveZoomLeft);
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a = new QAction(this);
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a->setObjectName(QStringLiteral("MoveZoomRight"));
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a->setText(i18n("Move Zoomed Area to Right"));
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>());
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>());
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effects->registerGlobalShortcut(QKeySequence(), a);
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connect(a, &QAction::triggered, this, &ZoomEffect::moveZoomRight);
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a = new QAction(this);
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a->setObjectName(QStringLiteral("MoveZoomUp"));
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a->setText(i18n("Move Zoomed Area Upwards"));
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>());
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>());
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effects->registerGlobalShortcut(QKeySequence(), a);
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connect(a, &QAction::triggered, this, &ZoomEffect::moveZoomUp);
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a = new QAction(this);
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a->setObjectName(QStringLiteral("MoveZoomDown"));
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a->setText(i18n("Move Zoomed Area Downwards"));
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>());
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>());
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effects->registerGlobalShortcut(QKeySequence(), a);
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connect(a, &QAction::triggered, this, &ZoomEffect::moveZoomDown);
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// TODO: these two actions don't belong into the effect. They need to be moved into KWin core
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a = new QAction(this);
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a->setObjectName(QStringLiteral("MoveMouseToFocus"));
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a->setText(i18n("Move Mouse to Focus"));
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_F5);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_F5);
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effects->registerGlobalShortcut(Qt::META + Qt::Key_F5, a);
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connect(a, &QAction::triggered, this, &ZoomEffect::moveMouseToFocus);
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a = new QAction(this);
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a->setObjectName(QStringLiteral("MoveMouseToCenter"));
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a->setText(i18n("Move Mouse to Center"));
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_F6);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_F6);
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effects->registerGlobalShortcut(Qt::META + Qt::Key_F6, a);
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connect(a, &QAction::triggered, this, &ZoomEffect::moveMouseToCenter);
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timeline.setDuration(350);
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timeline.setFrameRange(0, 100);
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connect(&timeline, &QTimeLine::frameChanged, this, &ZoomEffect::timelineFrameChanged);
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connect(effects, &EffectsHandler::mouseChanged, this, &ZoomEffect::slotMouseChanged);
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connect(effects, &EffectsHandler::windowDamaged, this, &ZoomEffect::slotWindowDamaged);
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#if HAVE_ACCESSIBILITY
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m_accessibilityIntegration = new ZoomAccessibilityIntegration(this);
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connect(m_accessibilityIntegration, &ZoomAccessibilityIntegration::focusPointChanged, this, &ZoomEffect::moveFocus);
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#endif
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source_zoom = -1; // used to trigger initialZoom reading
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reconfigure(ReconfigureAll);
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}
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ZoomEffect::~ZoomEffect()
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{
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// switch off and free resources
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showCursor();
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// Save the zoom value.
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ZoomConfig::setInitialZoom(target_zoom);
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ZoomConfig::self()->save();
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}
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bool ZoomEffect::isFocusTrackingEnabled() const
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{
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#if HAVE_ACCESSIBILITY
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return m_accessibilityIntegration->isFocusTrackingEnabled();
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#else
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return false;
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#endif
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}
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bool ZoomEffect::isTextCaretTrackingEnabled() const
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{
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#if HAVE_ACCESSIBILITY
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return m_accessibilityIntegration->isTextCaretTrackingEnabled();
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#else
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return false;
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#endif
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}
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void ZoomEffect::showCursor()
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{
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if (isMouseHidden) {
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disconnect(effects, &EffectsHandler::cursorShapeChanged, this, &ZoomEffect::recreateTexture);
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// show the previously hidden mouse-pointer again and free the loaded texture/picture.
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effects->showCursor();
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texture.reset();
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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xrenderPicture.reset();
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#endif
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isMouseHidden = false;
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}
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}
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void ZoomEffect::hideCursor()
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{
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if (mouseTracking == MouseTrackingProportional && mousePointer == MousePointerKeep)
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return; // don't replace the actual cursor by a static image for no reason.
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if (!isMouseHidden) {
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// try to load the cursor-theme into a OpenGL texture and if successful then hide the mouse-pointer
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recreateTexture();
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bool shouldHide = false;
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if (effects->isOpenGLCompositing()) {
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shouldHide = !texture.isNull();
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} else if (effects->compositingType() == XRenderCompositing) {
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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shouldHide = !xrenderPicture.isNull();
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#endif
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}
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if (shouldHide) {
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effects->hideCursor();
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connect(effects, &EffectsHandler::cursorShapeChanged, this, &ZoomEffect::recreateTexture);
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isMouseHidden = true;
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}
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}
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}
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void ZoomEffect::recreateTexture()
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{
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effects->makeOpenGLContextCurrent();
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const auto cursor = effects->cursorImage();
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if (!cursor.image().isNull()) {
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imageWidth = cursor.image().width();
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imageHeight = cursor.image().height();
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cursorHotSpot = cursor.hotSpot();
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if (effects->isOpenGLCompositing()) {
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texture.reset(new GLTexture(cursor.image()));
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texture->setWrapMode(GL_CLAMP_TO_EDGE);
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}
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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if (effects->compositingType() == XRenderCompositing)
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xrenderPicture.reset(new XRenderPicture(cursor.image()));
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#endif
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}
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else {
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qCDebug(KWINEFFECTS) << "Falling back to proportional mouse tracking!";
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mouseTracking = MouseTrackingProportional;
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}
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}
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void ZoomEffect::reconfigure(ReconfigureFlags)
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{
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ZoomConfig::self()->read();
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// On zoom-in and zoom-out change the zoom by the defined zoom-factor.
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zoomFactor = qMax(0.1, ZoomConfig::zoomFactor());
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// Visibility of the mouse-pointer.
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mousePointer = MousePointerType(ZoomConfig::mousePointer());
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// Track moving of the mouse.
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mouseTracking = MouseTrackingType(ZoomConfig::mouseTracking());
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#if HAVE_ACCESSIBILITY
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// Enable tracking of the focused location.
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m_accessibilityIntegration->setFocusTrackingEnabled(ZoomConfig::enableFocusTracking());
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// Enable tracking of the text caret.
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m_accessibilityIntegration->setTextCaretTrackingEnabled(ZoomConfig::enableTextCaretTracking());
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#endif
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// The time in milliseconds to wait before a focus-event takes away a mouse-move.
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focusDelay = qMax(uint(0), ZoomConfig::focusDelay());
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// The factor the zoom-area will be moved on touching an edge on push-mode or using the navigation KAction's.
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moveFactor = qMax(0.1, ZoomConfig::moveFactor());
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if (source_zoom < 0) {
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// Load the saved zoom value.
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source_zoom = 1.0;
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target_zoom = ZoomConfig::initialZoom();
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if (target_zoom > 1.0)
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zoomIn(target_zoom);
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} else {
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source_zoom = 1.0;
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}
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}
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void ZoomEffect::prePaintScreen(ScreenPrePaintData& data, std::chrono::milliseconds presentTime)
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{
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if (zoom != target_zoom) {
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int time = 0;
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if (lastPresentTime.count())
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time = (presentTime - lastPresentTime).count();
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lastPresentTime = presentTime;
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const float zoomDist = qAbs(target_zoom - source_zoom);
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if (target_zoom > zoom)
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zoom = qMin(zoom + ((zoomDist * time) / animationTime(150*zoomFactor)), target_zoom);
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else
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zoom = qMax(zoom - ((zoomDist * time) / animationTime(150*zoomFactor)), target_zoom);
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}
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if (zoom == 1.0) {
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showCursor();
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} else {
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hideCursor();
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data.mask |= PAINT_SCREEN_TRANSFORMED;
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}
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effects->prePaintScreen(data, presentTime);
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}
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void ZoomEffect::paintScreen(int mask, const QRegion ®ion, ScreenPaintData& data)
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{
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if (zoom != 1.0) {
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data *= QVector2D(zoom, zoom);
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const QSize screenSize = effects->virtualScreenSize();
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// mouse-tracking allows navigation of the zoom-area using the mouse.
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switch(mouseTracking) {
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case MouseTrackingProportional:
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data.setXTranslation(- int(cursorPoint.x() * (zoom - 1.0)));
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data.setYTranslation(- int(cursorPoint.y() * (zoom - 1.0)));
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prevPoint = cursorPoint;
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break;
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case MouseTrackingCentred:
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prevPoint = cursorPoint;
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// fall through
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case MouseTrackingDisabled:
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data.setXTranslation(qMin(0, qMax(int(screenSize.width() - screenSize.width() * zoom), int(screenSize.width() / 2 - prevPoint.x() * zoom))));
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data.setYTranslation(qMin(0, qMax(int(screenSize.height() - screenSize.height() * zoom), int(screenSize.height() / 2 - prevPoint.y() * zoom))));
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break;
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case MouseTrackingPush: {
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// touching an edge of the screen moves the zoom-area in that direction.
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int x = cursorPoint.x() * zoom - prevPoint.x() * (zoom - 1.0);
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int y = cursorPoint.y() * zoom - prevPoint.y() * (zoom - 1.0);
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int threshold = 4;
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xMove = yMove = 0;
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if (x < threshold)
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xMove = (x - threshold) / zoom;
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else if (x + threshold > screenSize.width())
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xMove = (x + threshold - screenSize.width()) / zoom;
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if (y < threshold)
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yMove = (y - threshold) / zoom;
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else if (y + threshold > screenSize.height())
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yMove = (y + threshold - screenSize.height()) / zoom;
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if (xMove)
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prevPoint.setX(qMax(0, qMin(screenSize.width(), prevPoint.x() + xMove)));
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if (yMove)
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prevPoint.setY(qMax(0, qMin(screenSize.height(), prevPoint.y() + yMove)));
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data.setXTranslation(- int(prevPoint.x() * (zoom - 1.0)));
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data.setYTranslation(- int(prevPoint.y() * (zoom - 1.0)));
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break;
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}
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}
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// use the focusPoint if focus tracking is enabled
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if (isFocusTrackingEnabled() || isTextCaretTrackingEnabled()) {
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bool acceptFocus = true;
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if (mouseTracking != MouseTrackingDisabled && focusDelay > 0) {
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// Wait some time for the mouse before doing the switch. This serves as threshold
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// to prevent the focus from jumping around to much while working with the mouse.
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const int msecs = lastMouseEvent.msecsTo(lastFocusEvent);
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acceptFocus = msecs > focusDelay;
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}
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if (acceptFocus) {
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data.setXTranslation(- int(focusPoint.x() * (zoom - 1.0)));
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data.setYTranslation(- int(focusPoint.y() * (zoom - 1.0)));
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prevPoint = focusPoint;
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}
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}
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}
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effects->paintScreen(mask, region, data);
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if (zoom != 1.0 && mousePointer != MousePointerHide) {
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// Draw the mouse-texture at the position matching to zoomed-in image of the desktop. Hiding the
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// previous mouse-cursor and drawing our own fake mouse-cursor is needed to be able to scale the
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// mouse-cursor up and to re-position those mouse-cursor to match to the chosen zoom-level.
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int w = imageWidth;
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int h = imageHeight;
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if (mousePointer == MousePointerScale) {
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w *= zoom;
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h *= zoom;
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}
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const QPoint p = effects->cursorPos() - cursorHotSpot;
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QRect rect(p.x() * zoom + data.xTranslation(), p.y() * zoom + data.yTranslation(), w, h);
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if (texture) {
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texture->bind();
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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auto s = ShaderManager::instance()->pushShader(ShaderTrait::MapTexture);
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QMatrix4x4 mvp = data.projectionMatrix();
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mvp.translate(rect.x(), rect.y());
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s->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
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texture->render(region, rect);
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ShaderManager::instance()->popShader();
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texture->unbind();
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glDisable(GL_BLEND);
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}
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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if (xrenderPicture) {
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#define DOUBLE_TO_FIXED(d) ((xcb_render_fixed_t) ((d) * 65536))
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static const xcb_render_transform_t xrenderIdentity = {
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DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0),
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DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0),
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DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1)
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};
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if (mousePointer == MousePointerScale) {
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xcb_render_set_picture_filter(xcbConnection(), *xrenderPicture, 4, const_cast<char*>("good"), 0, nullptr);
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const xcb_render_transform_t xform = {
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DOUBLE_TO_FIXED(1.0 / zoom), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0),
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DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1.0 / zoom), DOUBLE_TO_FIXED(0),
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DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1)
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};
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xcb_render_set_picture_transform(xcbConnection(), *xrenderPicture, xform);
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}
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xcb_render_composite(xcbConnection(), XCB_RENDER_PICT_OP_OVER, *xrenderPicture, XCB_RENDER_PICTURE_NONE,
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effects->xrenderBufferPicture(), 0, 0, 0, 0, rect.x(), rect.y(), rect.width(), rect.height());
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if (mousePointer == MousePointerScale)
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xcb_render_set_picture_transform(xcbConnection(), *xrenderPicture, xrenderIdentity);
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#undef DOUBLE_TO_FIXED
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}
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#endif
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}
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}
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void ZoomEffect::postPaintScreen()
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{
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if (zoom != target_zoom)
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effects->addRepaintFull();
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else
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lastPresentTime = std::chrono::milliseconds::zero();
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effects->postPaintScreen();
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}
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void ZoomEffect::zoomIn(double to)
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{
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source_zoom = zoom;
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if (to < 0.0)
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target_zoom *= zoomFactor;
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else
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target_zoom = to;
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if (!polling) {
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polling = true;
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effects->startMousePolling();
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}
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cursorPoint = effects->cursorPos();
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if (mouseTracking == MouseTrackingDisabled)
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prevPoint = cursorPoint;
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effects->addRepaintFull();
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}
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void ZoomEffect::zoomOut()
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{
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source_zoom = zoom;
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target_zoom /= zoomFactor;
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if ((zoomFactor > 1 && target_zoom < 1.01) || (zoomFactor < 1 && target_zoom > 0.99)) {
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target_zoom = 1;
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if (polling) {
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polling = false;
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effects->stopMousePolling();
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}
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}
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if (mouseTracking == MouseTrackingDisabled)
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prevPoint = effects->cursorPos();
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effects->addRepaintFull();
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}
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void ZoomEffect::actualSize()
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{
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source_zoom = zoom;
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target_zoom = 1;
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if (polling) {
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polling = false;
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effects->stopMousePolling();
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}
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effects->addRepaintFull();
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}
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void ZoomEffect::timelineFrameChanged(int /* frame */)
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{
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const QSize screenSize = effects->virtualScreenSize();
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prevPoint.setX(qMax(0, qMin(screenSize.width(), prevPoint.x() + xMove)));
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prevPoint.setY(qMax(0, qMin(screenSize.height(), prevPoint.y() + yMove)));
|
|
cursorPoint = prevPoint;
|
|
effects->addRepaintFull();
|
|
}
|
|
|
|
void ZoomEffect::moveZoom(int x, int y)
|
|
{
|
|
if (timeline.state() == QTimeLine::Running)
|
|
timeline.stop();
|
|
|
|
const QSize screenSize = effects->virtualScreenSize();
|
|
if (x < 0)
|
|
xMove = - qMax(1.0, screenSize.width() / zoom / moveFactor);
|
|
else if (x > 0)
|
|
xMove = qMax(1.0, screenSize.width() / zoom / moveFactor);
|
|
else
|
|
xMove = 0;
|
|
|
|
if (y < 0)
|
|
yMove = - qMax(1.0, screenSize.height() / zoom / moveFactor);
|
|
else if (y > 0)
|
|
yMove = qMax(1.0, screenSize.height() / zoom / moveFactor);
|
|
else
|
|
yMove = 0;
|
|
|
|
timeline.start();
|
|
}
|
|
|
|
void ZoomEffect::moveZoomLeft()
|
|
{
|
|
moveZoom(-1, 0);
|
|
}
|
|
|
|
void ZoomEffect::moveZoomRight()
|
|
{
|
|
moveZoom(1, 0);
|
|
}
|
|
|
|
void ZoomEffect::moveZoomUp()
|
|
{
|
|
moveZoom(0, -1);
|
|
}
|
|
|
|
void ZoomEffect::moveZoomDown()
|
|
{
|
|
moveZoom(0, 1);
|
|
}
|
|
|
|
void ZoomEffect::moveMouseToFocus()
|
|
{
|
|
QCursor::setPos(focusPoint.x(), focusPoint.y());
|
|
}
|
|
|
|
void ZoomEffect::moveMouseToCenter()
|
|
{
|
|
const QRect r = effects->virtualScreenGeometry();
|
|
QCursor::setPos(r.x() + r.width() / 2, r.y() + r.height() / 2);
|
|
}
|
|
|
|
void ZoomEffect::slotMouseChanged(const QPoint& pos, const QPoint& old, Qt::MouseButtons,
|
|
Qt::MouseButtons, Qt::KeyboardModifiers, Qt::KeyboardModifiers)
|
|
{
|
|
if (zoom == 1.0)
|
|
return;
|
|
cursorPoint = pos;
|
|
if (pos != old) {
|
|
lastMouseEvent = QTime::currentTime();
|
|
effects->addRepaintFull();
|
|
}
|
|
}
|
|
|
|
void ZoomEffect::slotWindowDamaged()
|
|
{
|
|
if (zoom != 1.0) {
|
|
effects->addRepaintFull();
|
|
}
|
|
}
|
|
|
|
void ZoomEffect::moveFocus(const QPoint &point)
|
|
{
|
|
if (zoom == 1.0)
|
|
return;
|
|
focusPoint = point;
|
|
lastFocusEvent = QTime::currentTime();
|
|
effects->addRepaintFull();
|
|
}
|
|
|
|
bool ZoomEffect::isActive() const
|
|
{
|
|
return zoom != 1.0 || zoom != target_zoom;
|
|
}
|
|
|
|
} // namespace
|
|
|