kwin/src/focuschain.cpp
2022-04-25 11:33:55 +00:00

261 lines
7.2 KiB
C++

/*
KWin - the KDE window manager
This file is part of the KDE project.
SPDX-FileCopyrightText: 2012 Martin Gräßlin <mgraesslin@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "focuschain.h"
#include "window.h"
#include "workspace.h"
namespace KWin
{
KWIN_SINGLETON_FACTORY_VARIABLE(FocusChain, s_manager)
FocusChain::FocusChain(QObject *parent)
: QObject(parent)
, m_separateScreenFocus(false)
, m_activeWindow(nullptr)
{
}
FocusChain::~FocusChain()
{
s_manager = nullptr;
}
void FocusChain::remove(Window *window)
{
for (auto it = m_desktopFocusChains.begin();
it != m_desktopFocusChains.end();
++it) {
it.value().removeAll(window);
}
m_mostRecentlyUsed.removeAll(window);
}
void FocusChain::addDesktop(VirtualDesktop *desktop)
{
m_desktopFocusChains.insert(desktop, Chain());
}
void FocusChain::removeDesktop(VirtualDesktop *desktop)
{
if (m_currentDesktop == desktop) {
m_currentDesktop = nullptr;
}
m_desktopFocusChains.remove(desktop);
}
Window *FocusChain::getForActivation(VirtualDesktop *desktop) const
{
return getForActivation(desktop, workspace()->activeOutput());
}
Window *FocusChain::getForActivation(VirtualDesktop *desktop, Output *output) const
{
auto it = m_desktopFocusChains.constFind(desktop);
if (it == m_desktopFocusChains.constEnd()) {
return nullptr;
}
const auto &chain = it.value();
for (int i = chain.size() - 1; i >= 0; --i) {
auto tmp = chain.at(i);
// TODO: move the check into Window
if (!tmp->isShade() && tmp->isShown() && tmp->isOnCurrentActivity()
&& (!m_separateScreenFocus || tmp->output() == output)) {
return tmp;
}
}
return nullptr;
}
void FocusChain::update(Window *window, FocusChain::Change change)
{
if (!window->wantsTabFocus()) {
// Doesn't want tab focus, remove
remove(window);
return;
}
if (window->isOnAllDesktops()) {
// Now on all desktops, add it to focus chains it is not already in
for (auto it = m_desktopFocusChains.begin();
it != m_desktopFocusChains.end();
++it) {
auto &chain = it.value();
// Making first/last works only on current desktop, don't affect all desktops
if (it.key() == m_currentDesktop
&& (change == MakeFirst || change == MakeLast)) {
if (change == MakeFirst) {
makeFirstInChain(window, chain);
} else {
makeLastInChain(window, chain);
}
} else {
insertWindowIntoChain(window, chain);
}
}
} else {
// Now only on desktop, remove it anywhere else
for (auto it = m_desktopFocusChains.begin();
it != m_desktopFocusChains.end();
++it) {
auto &chain = it.value();
if (window->isOnDesktop(it.key())) {
updateWindowInChain(window, change, chain);
} else {
chain.removeAll(window);
}
}
}
// add for most recently used chain
updateWindowInChain(window, change, m_mostRecentlyUsed);
}
void FocusChain::updateWindowInChain(Window *window, FocusChain::Change change, Chain &chain)
{
if (change == MakeFirst) {
makeFirstInChain(window, chain);
} else if (change == MakeLast) {
makeLastInChain(window, chain);
} else {
insertWindowIntoChain(window, chain);
}
}
void FocusChain::insertWindowIntoChain(Window *window, Chain &chain)
{
if (chain.contains(window)) {
return;
}
if (m_activeWindow && m_activeWindow != window && !chain.empty() && chain.last() == m_activeWindow) {
// Add it after the active window
chain.insert(chain.size() - 1, window);
} else {
// Otherwise add as the first one
chain.append(window);
}
}
void FocusChain::moveAfterWindow(Window *window, Window *reference)
{
if (!window->wantsTabFocus()) {
return;
}
for (auto it = m_desktopFocusChains.begin();
it != m_desktopFocusChains.end();
++it) {
if (!window->isOnDesktop(it.key())) {
continue;
}
moveAfterWindowInChain(window, reference, it.value());
}
moveAfterWindowInChain(window, reference, m_mostRecentlyUsed);
}
void FocusChain::moveAfterWindowInChain(Window *window, Window *reference, Chain &chain)
{
if (!chain.contains(reference)) {
return;
}
if (Window::belongToSameApplication(reference, window)) {
chain.removeAll(window);
chain.insert(chain.indexOf(reference), window);
} else {
chain.removeAll(window);
for (int i = chain.size() - 1; i >= 0; --i) {
if (Window::belongToSameApplication(reference, chain.at(i))) {
chain.insert(i, window);
break;
}
}
}
}
Window *FocusChain::firstMostRecentlyUsed() const
{
if (m_mostRecentlyUsed.isEmpty()) {
return nullptr;
}
return m_mostRecentlyUsed.first();
}
Window *FocusChain::nextMostRecentlyUsed(Window *reference) const
{
if (m_mostRecentlyUsed.isEmpty()) {
return nullptr;
}
const int index = m_mostRecentlyUsed.indexOf(reference);
if (index == -1) {
return m_mostRecentlyUsed.first();
}
if (index == 0) {
return m_mostRecentlyUsed.last();
}
return m_mostRecentlyUsed.at(index - 1);
}
// copied from activation.cpp
bool FocusChain::isUsableFocusCandidate(Window *c, Window *prev) const
{
return c != prev && !c->isShade() && c->isShown() && c->isOnCurrentDesktop() && c->isOnCurrentActivity() && (!m_separateScreenFocus || c->isOnOutput(prev ? prev->output() : workspace()->activeOutput()));
}
Window *FocusChain::nextForDesktop(Window *reference, VirtualDesktop *desktop) const
{
auto it = m_desktopFocusChains.constFind(desktop);
if (it == m_desktopFocusChains.constEnd()) {
return nullptr;
}
const auto &chain = it.value();
for (int i = chain.size() - 1; i >= 0; --i) {
auto window = chain.at(i);
if (isUsableFocusCandidate(window, reference)) {
return window;
}
}
return nullptr;
}
void FocusChain::makeFirstInChain(Window *window, Chain &chain)
{
chain.removeAll(window);
if (options->moveMinimizedWindowsToEndOfTabBoxFocusChain()) {
if (window->isMinimized()) { // add it before the first minimized ...
for (int i = chain.count() - 1; i >= 0; --i) {
if (chain.at(i)->isMinimized()) {
chain.insert(i + 1, window);
return;
}
}
chain.prepend(window); // ... or at end of chain
} else {
chain.append(window);
}
} else {
chain.append(window);
}
}
void FocusChain::makeLastInChain(Window *window, Chain &chain)
{
chain.removeAll(window);
chain.prepend(window);
}
bool FocusChain::contains(Window *window, VirtualDesktop *desktop) const
{
auto it = m_desktopFocusChains.constFind(desktop);
if (it == m_desktopFocusChains.constEnd()) {
return false;
}
return it.value().contains(window);
}
} // namespace