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kwin/effects/mousemark/mousemark.cpp
Vlad Zahorodnii 62a7db7028 Use nullptr everywhere 
Summary:
Because KWin is a very old project, we use three kinds of null pointer
literals: 0, NULL, and nullptr. Since C++11, it's recommended to use
nullptr keyword.

This change converts all usages of 0 and NULL literal to nullptr. Even
though it breaks git history, we need to do it in order to have consistent
code as well to ease code reviews (it's very tempting for some people to
add unrelated changes to their patches, e.g. converting NULL to nullptr).

Test Plan: Compiles.

Reviewers: #kwin, davidedmundson, romangg

Reviewed By: #kwin, davidedmundson, romangg

Subscribers: romangg, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D23618
2019-09-19 17:48:21 +03:00

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
Copyright (C) 2007 Christian Nitschkowski <christian.nitschkowski@kdemail.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "mousemark.h"
// KConfigSkeleton
#include "mousemarkconfig.h"
#include <QAction>
#include <kwinconfig.h>
#include <kwinglplatform.h>
#include <kwinglutils.h>
#include <KGlobalAccel>
#include <KLocalizedString>
#include <QPainter>
#include <cmath>
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
#include <xcb/render.h>
#endif
namespace KWin
{
#define NULL_POINT (QPoint( -1, -1 )) // null point is (0,0), which is valid :-/
MouseMarkEffect::MouseMarkEffect()
{
initConfig<MouseMarkConfig>();
QAction* a = new QAction(this);
a->setObjectName(QStringLiteral("ClearMouseMarks"));
a->setText(i18n("Clear All Mouse Marks"));
KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::SHIFT + Qt::META + Qt::Key_F11);
KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::SHIFT + Qt::META + Qt::Key_F11);
effects->registerGlobalShortcut(Qt::SHIFT + Qt::META + Qt::Key_F11, a);
connect(a, &QAction::triggered, this, &MouseMarkEffect::clear);
a = new QAction(this);
a->setObjectName(QStringLiteral("ClearLastMouseMark"));
a->setText(i18n("Clear Last Mouse Mark"));
KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::SHIFT + Qt::META + Qt::Key_F12);
KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::SHIFT + Qt::META + Qt::Key_F12);
effects->registerGlobalShortcut(Qt::SHIFT + Qt::META + Qt::Key_F12, a);
connect(a, &QAction::triggered, this, &MouseMarkEffect::clearLast);
connect(effects, &EffectsHandler::mouseChanged, this, &MouseMarkEffect::slotMouseChanged);
connect(effects, &EffectsHandler::screenLockingChanged, this, &MouseMarkEffect::screenLockingChanged);
reconfigure(ReconfigureAll);
arrow_start = NULL_POINT;
effects->startMousePolling(); // We require it to detect activation as well
}
MouseMarkEffect::~MouseMarkEffect()
{
effects->stopMousePolling();
}
static int width_2 = 1;
void MouseMarkEffect::reconfigure(ReconfigureFlags)
{
MouseMarkConfig::self()->read();
width = MouseMarkConfig::lineWidth();
width_2 = width / 2;
color = MouseMarkConfig::color();
color.setAlphaF(1.0);
}
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
void MouseMarkEffect::addRect(const QPoint &p1, const QPoint &p2, xcb_rectangle_t *r, xcb_render_color_t *c)
{
r->x = qMin(p1.x(), p2.x()) - width_2;
r->y = qMin(p1.y(), p2.y()) - width_2;
r->width = qAbs(p1.x()-p2.x()) + 1 + width_2;
r->height = qAbs(p1.y()-p2.y()) + 1 + width_2;
// fast move -> large rect, <strike>tess...</strike> interpolate a line
if (r->width > 3*width/2 && r->height > 3*width/2) {
const int n = sqrt(r->width*r->width + r->height*r->height) / width;
xcb_rectangle_t *rects = new xcb_rectangle_t[n-1];
const int w = p1.x() < p2.x() ? r->width : -r->width;
const int h = p1.y() < p2.y() ? r->height : -r->height;
for (int i = 1; i < n; ++i) {
rects[i-1].x = p1.x() + i*w/n;
rects[i-1].y = p1.y() + i*h/n;
rects[i-1].width = rects[i-1].height = width;
}
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, effects->xrenderBufferPicture(), *c, n - 1, rects);
delete [] rects;
r->x = p1.x();
r->y = p1.y();
r->width = r->height = width;
}
}
#endif
void MouseMarkEffect::paintScreen(int mask, QRegion region, ScreenPaintData& data)
{
effects->paintScreen(mask, region, data); // paint normal screen
if (marks.isEmpty() && drawing.isEmpty())
return;
if ( effects->isOpenGLCompositing()) {
if (!GLPlatform::instance()->isGLES()) {
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_LINE_SMOOTH);
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
}
glLineWidth(width);
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
vbo->reset();
vbo->setUseColor(true);
vbo->setColor(color);
ShaderBinder binder(ShaderTrait::UniformColor);
binder.shader()->setUniform(GLShader::ModelViewProjectionMatrix, data.projectionMatrix());
QVector<float> verts;
foreach (const Mark & mark, marks) {
verts.clear();
verts.reserve(mark.size() * 2);
foreach (const QPoint & p, mark) {
verts << p.x() << p.y();
}
vbo->setData(verts.size() / 2, 2, verts.data(), nullptr);
vbo->render(GL_LINE_STRIP);
}
if (!drawing.isEmpty()) {
verts.clear();
verts.reserve(drawing.size() * 2);
foreach (const QPoint & p, drawing) {
verts << p.x() << p.y();
}
vbo->setData(verts.size() / 2, 2, verts.data(), nullptr);
vbo->render(GL_LINE_STRIP);
}
glLineWidth(1.0);
if (!GLPlatform::instance()->isGLES()) {
glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
}
}
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
if ( effects->compositingType() == XRenderCompositing) {
xcb_render_color_t c = preMultiply(color);
for (int i = 0; i < marks.count(); ++i) {
const int n = marks[i].count() - 1;
if (n > 0) {
xcb_rectangle_t *rects = new xcb_rectangle_t[n];
for (int j = 0; j < marks[i].count()-1; ++j) {
addRect(marks[i][j], marks[i][j+1], &rects[j], &c);
}
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, effects->xrenderBufferPicture(), c, n, rects);
delete [] rects;
}
}
const int n = drawing.count() - 1;
if (n > 0) {
xcb_rectangle_t *rects = new xcb_rectangle_t[n];
for (int i = 0; i < n; ++i)
addRect(drawing[i], drawing[i+1], &rects[i], &c);
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, effects->xrenderBufferPicture(), c, n, rects);
delete [] rects;
}
}
#endif
if (effects->compositingType() == QPainterCompositing) {
QPainter *painter = effects->scenePainter();
painter->save();
QPen pen(color);
pen.setWidth(width);
painter->setPen(pen);
foreach (const Mark &mark, marks) {
drawMark(painter, mark);
}
drawMark(painter, drawing);
painter->restore();
}
}
void MouseMarkEffect::drawMark(QPainter *painter, const Mark &mark)
{
if (mark.count() <= 1) {
return;
}
for (int i = 0; i < mark.count() - 1; ++i) {
painter->drawLine(mark[i], mark[i+1]);
}
}
void MouseMarkEffect::slotMouseChanged(const QPoint& pos, const QPoint&,
Qt::MouseButtons, Qt::MouseButtons,
Qt::KeyboardModifiers modifiers, Qt::KeyboardModifiers)
{
if (modifiers == (Qt::META | Qt::SHIFT | Qt::CTRL)) { // start/finish arrow
if (arrow_start != NULL_POINT) {
marks.append(createArrow(arrow_start, pos));
arrow_start = NULL_POINT;
effects->addRepaintFull();
return;
} else
arrow_start = pos;
}
if (arrow_start != NULL_POINT)
return;
// TODO the shortcuts now trigger this right before they're activated
if (modifiers == (Qt::META | Qt::SHIFT)) { // activated
if (drawing.isEmpty())
drawing.append(pos);
if (drawing.last() == pos)
return;
QPoint pos2 = drawing.last();
drawing.append(pos);
QRect repaint = QRect(qMin(pos.x(), pos2.x()), qMin(pos.y(), pos2.y()),
qMax(pos.x(), pos2.x()), qMax(pos.y(), pos2.y()));
repaint.adjust(-width, -width, width, width);
effects->addRepaint(repaint);
} else if (!drawing.isEmpty()) {
marks.append(drawing);
drawing.clear();
}
}
void MouseMarkEffect::clear()
{
drawing.clear();
marks.clear();
effects->addRepaintFull();
}
void MouseMarkEffect::clearLast()
{
if (arrow_start != NULL_POINT) {
arrow_start = NULL_POINT;
} else if (!drawing.isEmpty()) {
drawing.clear();
effects->addRepaintFull();
} else if (!marks.isEmpty()) {
marks.pop_back();
effects->addRepaintFull();
}
}
MouseMarkEffect::Mark MouseMarkEffect::createArrow(QPoint arrow_start, QPoint arrow_end)
{
Mark ret;
double angle = atan2((double)(arrow_end.y() - arrow_start.y()), (double)(arrow_end.x() - arrow_start.x()));
ret += arrow_start + QPoint(50 * cos(angle + M_PI / 6),
50 * sin(angle + M_PI / 6)); // right one
ret += arrow_start;
ret += arrow_end;
ret += arrow_start; // it's connected lines, so go back with the middle one
ret += arrow_start + QPoint(50 * cos(angle - M_PI / 6),
50 * sin(angle - M_PI / 6)); // left one
return ret;
}
void MouseMarkEffect::screenLockingChanged(bool locked)
{
if (!marks.isEmpty() || !drawing.isEmpty()) {
effects->addRepaintFull();
}
// disable mouse polling while screen is locked.
if (locked) {
effects->stopMousePolling();
} else {
effects->startMousePolling();
}
}
bool MouseMarkEffect::isActive() const
{
return (!marks.isEmpty() || !drawing.isEmpty()) && !effects->isScreenLocked();
}
} // namespace
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