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manager.cpp
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manager.cpp
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// Aseprite UI Library
// Copyright (C) 2001-2018 David Capello
//
// This file is released under the terms of the MIT license.
// Read LICENSE.txt for more information.
// #define REPORT_EVENTS
// #define REPORT_FOCUS_MOVEMENT
// #define DEBUG_PAINT_EVENTS
// #define LIMIT_DISPATCH_TIME
// #define DEBUG_UI_THREADS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ui/manager.h"
#include "base/concurrent_queue.h"
#include "base/scoped_value.h"
#include "base/time.h"
#include "she/display.h"
#include "she/event.h"
#include "she/event_queue.h"
#include "she/surface.h"
#include "she/system.h"
#include "ui/intern.h"
#include "ui/ui.h"
#if defined(DEBUG_PAINT_EVENTS) || defined(DEBUG_UI_THREADS)
#include "base/thread.h"
#endif
#ifdef REPORT_EVENTS
#include <iostream>
#endif
#include <algorithm>
#include <limits>
#include <list>
#include <utility>
#include <vector>
namespace ui {
#define ACCEPT_FOCUS(widget) \
((((widget)->flags() & (FOCUS_STOP | \
DISABLED | \
HIDDEN | \
DECORATIVE)) == FOCUS_STOP) && \
((widget)->isVisible()))
static const int NFILTERS = (int)(kFirstRegisteredMessage+1);
struct Filter {
int message;
Widget* widget;
Filter(int message, Widget* widget)
: message(message)
, widget(widget) { }
};
typedef std::list<Message*> Messages;
typedef std::list<Filter*> Filters;
Manager* Manager::m_defaultManager = NULL;
gfx::Region Manager::m_dirtyRegion;
#ifdef DEBUG_UI_THREADS
static base::thread::native_handle_type manager_thread = 0;
#endif
static WidgetsList mouse_widgets_list; // List of widgets to send mouse events
static Messages msg_queue; // Messages queue
static base::concurrent_queue<Message*> concurrent_msg_queue;
static Filters msg_filters[NFILTERS]; // Filters for every enqueued message
static int filter_locks = 0;
static Widget* focus_widget; // The widget with the focus
static Widget* mouse_widget; // The widget with the mouse
static Widget* capture_widget; // The widget that captures the mouse
static bool first_time = true; // true when we don't enter in poll yet
// Don't adjust window positions automatically when it's false. Used
// when Screen/UI scaling is changed to avoid adjusting windows as
// when the she::Display is resized by the user.
static bool auto_window_adjustment = true;
/* keyboard focus movement stuff */
static int count_widgets_accept_focus(Widget* widget);
static bool child_accept_focus(Widget* widget, bool first);
static Widget* next_widget(Widget* widget);
static int cmp_left(Widget* widget, int x, int y);
static int cmp_right(Widget* widget, int x, int y);
static int cmp_up(Widget* widget, int x, int y);
static int cmp_down(Widget* widget, int x, int y);
namespace {
class LockFilters {
public:
LockFilters() {
++filter_locks;
}
~LockFilters() {
ASSERT(filter_locks > 0);
--filter_locks;
if (filter_locks == 0) {
// Clear empty filters
for (Filters& msg_filter : msg_filters) {
for (auto it = msg_filter.begin(); it != msg_filter.end(); ) {
Filter* filter = *it;
if (filter->widget == nullptr) {
delete filter;
it = msg_filter.erase(it);
}
else {
++it;
}
}
}
}
}
};
} // anonymous namespace
// static
bool Manager::widgetAssociatedToManager(Widget* widget)
{
return (focus_widget == widget ||
mouse_widget == widget ||
capture_widget == widget ||
std::find(mouse_widgets_list.begin(),
mouse_widgets_list.end(),
widget) != mouse_widgets_list.end());
}
Manager::Manager()
: Widget(kManagerWidget)
, m_display(NULL)
, m_eventQueue(NULL)
, m_lockedWindow(NULL)
, m_mouseButtons(kButtonNone)
{
#ifdef DEBUG_UI_THREADS
ASSERT(!manager_thread);
manager_thread = base::this_thread::native_handle();
#endif
if (!m_defaultManager) {
// Empty lists
ASSERT(msg_queue.empty());
mouse_widgets_list.clear();
// Reset variables
focus_widget = NULL;
mouse_widget = NULL;
capture_widget = NULL;
}
setBounds(gfx::Rect(0, 0, ui::display_w(), ui::display_h()));
setVisible(true);
m_dirtyRegion = bounds();
// Default manager is the first one (and is always visible).
if (!m_defaultManager)
m_defaultManager = this;
}
Manager::~Manager()
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_handle());
#endif
// There are some messages in queue? Dispatch everything.
dispatchMessages();
collectGarbage();
// Finish the main manager.
if (m_defaultManager == this) {
// No more cursor
set_mouse_cursor(kNoCursor);
// Destroy timers
Timer::checkNoTimers();
// Destroy filters
#ifdef _DEBUG
for (Filters& msg_filter : msg_filters)
ASSERT(msg_filter.empty());
#endif
// No more default manager
m_defaultManager = nullptr;
// Shutdown system
ASSERT(msg_queue.empty());
mouse_widgets_list.clear();
}
}
void Manager::setDisplay(she::Display* display)
{
base::ScopedValue<bool> lock(
auto_window_adjustment, false,
auto_window_adjustment);
m_display = display;
m_eventQueue = she::instance()->eventQueue();
onNewDisplayConfiguration();
}
void Manager::run()
{
MessageLoop loop(this);
if (first_time) {
first_time = false;
Manager::getDefault()->invalidate();
set_mouse_cursor(kArrowCursor);
}
while (!children().empty())
loop.pumpMessages();
}
void Manager::flipDisplay()
{
if (!m_display)
return;
OverlayManager* overlays = OverlayManager::instance();
update_cursor_overlay();
// Draw overlays.
overlays->captureOverlappedAreas();
overlays->drawOverlays();
// Flip dirty region.
{
m_dirtyRegion.createIntersection(
m_dirtyRegion,
gfx::Region(gfx::Rect(0, 0, ui::display_w(), ui::display_h())));
for (auto& rc : m_dirtyRegion)
m_display->flip(rc);
m_dirtyRegion.clear();
}
overlays->restoreOverlappedAreas();
}
bool Manager::generateMessages()
{
// First check: there are windows to manage?
if (children().empty())
return false;
// Generate messages from other threads
if (!concurrent_msg_queue.empty()) {
Message* msg = nullptr;
while (concurrent_msg_queue.try_pop(msg))
msg_queue.push_back(msg);
}
// Generate messages from OS input
generateMessagesFromSheEvents();
// Generate messages for timers
Timer::pollTimers();
if (!msg_queue.empty())
return true;
else
return false;
}
void Manager::generateSetCursorMessage(const gfx::Point& mousePos,
KeyModifiers modifiers,
PointerType pointerType)
{
if (get_mouse_cursor() == kOutsideDisplay)
return;
Widget* dst = (capture_widget ? capture_widget: mouse_widget);
if (dst)
enqueueMessage(
newMouseMessage(
kSetCursorMessage, dst,
mousePos,
pointerType,
_internal_get_mouse_buttons(),
modifiers));
else
set_mouse_cursor(kArrowCursor);
}
static MouseButtons mouse_buttons_from_she_to_ui(const she::Event& sheEvent)
{
switch (sheEvent.button()) {
case she::Event::LeftButton: return kButtonLeft; break;
case she::Event::RightButton: return kButtonRight; break;
case she::Event::MiddleButton: return kButtonMiddle; break;
case she::Event::X1Button: return kButtonX1; break;
case she::Event::X2Button: return kButtonX2; break;
default: return kButtonNone;
}
}
void Manager::generateMessagesFromSheEvents()
{
she::Event lastMouseMoveEvent;
// Events from "she" layer.
she::Event sheEvent;
for (;;) {
// bool canWait = (msg_queue.empty());
bool canWait = false;
m_eventQueue->getEvent(sheEvent, canWait);
if (sheEvent.type() == she::Event::None)
break;
switch (sheEvent.type()) {
case she::Event::CloseDisplay: {
Message* msg = new Message(kCloseDisplayMessage);
msg->broadcastToChildren(this);
enqueueMessage(msg);
break;
}
case she::Event::ResizeDisplay: {
Message* msg = new Message(kResizeDisplayMessage);
msg->broadcastToChildren(this);
enqueueMessage(msg);
break;
}
case she::Event::DropFiles: {
Message* msg = new DropFilesMessage(sheEvent.files());
msg->addRecipient(this);
enqueueMessage(msg);
break;
}
case she::Event::KeyDown:
case she::Event::KeyUp: {
Message* msg = new KeyMessage(
(sheEvent.type() == she::Event::KeyDown ?
kKeyDownMessage:
kKeyUpMessage),
sheEvent.scancode(),
sheEvent.modifiers(),
sheEvent.unicodeChar(),
sheEvent.repeat());
if (sheEvent.isDeadKey())
static_cast<KeyMessage*>(msg)->setDeadKey(true);
broadcastKeyMsg(msg);
enqueueMessage(msg);
break;
}
case she::Event::MouseEnter: {
_internal_set_mouse_position(sheEvent.position());
set_mouse_cursor(kArrowCursor);
lastMouseMoveEvent = sheEvent;
break;
}
case she::Event::MouseLeave: {
set_mouse_cursor(kOutsideDisplay);
setMouse(NULL);
_internal_no_mouse_position();
// To avoid calling kSetCursorMessage when the mouse leaves
// the window.
lastMouseMoveEvent = she::Event();
break;
}
case she::Event::MouseMove: {
_internal_set_mouse_position(sheEvent.position());
handleMouseMove(
sheEvent.position(),
m_mouseButtons,
sheEvent.modifiers(),
sheEvent.pointerType());
lastMouseMoveEvent = sheEvent;
break;
}
case she::Event::MouseDown: {
MouseButtons pressedButton = mouse_buttons_from_she_to_ui(sheEvent);
m_mouseButtons = (MouseButtons)((int)m_mouseButtons | (int)pressedButton);
_internal_set_mouse_buttons(m_mouseButtons);
handleMouseDown(
sheEvent.position(),
pressedButton,
sheEvent.modifiers(),
sheEvent.pointerType());
break;
}
case she::Event::MouseUp: {
MouseButtons releasedButton = mouse_buttons_from_she_to_ui(sheEvent);
m_mouseButtons = (MouseButtons)((int)m_mouseButtons & ~(int)releasedButton);
_internal_set_mouse_buttons(m_mouseButtons);
handleMouseUp(
sheEvent.position(),
releasedButton,
sheEvent.modifiers(),
sheEvent.pointerType());
break;
}
case she::Event::MouseDoubleClick: {
MouseButtons clickedButton = mouse_buttons_from_she_to_ui(sheEvent);
handleMouseDoubleClick(
sheEvent.position(),
clickedButton,
sheEvent.modifiers(),
sheEvent.pointerType());
break;
}
case she::Event::MouseWheel: {
handleMouseWheel(sheEvent.position(), m_mouseButtons,
sheEvent.modifiers(),
sheEvent.pointerType(),
sheEvent.wheelDelta(),
sheEvent.preciseWheel());
break;
}
case she::Event::TouchMagnify: {
_internal_set_mouse_position(sheEvent.position());
handleTouchMagnify(sheEvent.position(),
sheEvent.modifiers(),
sheEvent.magnification());
break;
}
}
}
// Generate just one kSetCursorMessage for the last mouse position
if (lastMouseMoveEvent.type() != she::Event::None) {
sheEvent = lastMouseMoveEvent;
generateSetCursorMessage(sheEvent.position(),
sheEvent.modifiers(),
sheEvent.pointerType());
}
}
void Manager::handleMouseMove(const gfx::Point& mousePos,
MouseButtons mouseButtons,
KeyModifiers modifiers,
PointerType pointerType)
{
// Get the list of widgets to send mouse messages.
mouse_widgets_list.clear();
broadcastMouseMessage(mouse_widgets_list);
// Get the widget under the mouse
Widget* widget = nullptr;
for (auto mouseWidget : mouse_widgets_list) {
widget = mouseWidget->pick(mousePos);
if (widget)
break;
}
// Fixup "mouse" flag
if (widget != mouse_widget) {
if (!widget)
freeMouse();
else
setMouse(widget);
}
// Send the mouse movement message
Widget* dst = (capture_widget ? capture_widget: mouse_widget);
enqueueMessage(
newMouseMessage(
kMouseMoveMessage, dst,
mousePos,
pointerType,
mouseButtons,
modifiers));
}
void Manager::handleMouseDown(const gfx::Point& mousePos,
MouseButtons mouseButtons,
KeyModifiers modifiers,
PointerType pointerType)
{
handleWindowZOrder();
enqueueMessage(
newMouseMessage(
kMouseDownMessage,
(capture_widget ? capture_widget: mouse_widget),
mousePos,
pointerType,
mouseButtons,
modifiers));
}
void Manager::handleMouseUp(const gfx::Point& mousePos,
MouseButtons mouseButtons,
KeyModifiers modifiers,
PointerType pointerType)
{
enqueueMessage(
newMouseMessage(
kMouseUpMessage,
(capture_widget ? capture_widget: mouse_widget),
mousePos,
pointerType,
mouseButtons,
modifiers));
}
void Manager::handleMouseDoubleClick(const gfx::Point& mousePos,
MouseButtons mouseButtons,
KeyModifiers modifiers,
PointerType pointerType)
{
Widget* dst = (capture_widget ? capture_widget: mouse_widget);
if (dst) {
enqueueMessage(
newMouseMessage(
kDoubleClickMessage,
dst, mousePos, pointerType,
mouseButtons, modifiers));
}
}
void Manager::handleMouseWheel(const gfx::Point& mousePos,
MouseButtons mouseButtons,
KeyModifiers modifiers,
PointerType pointerType,
const gfx::Point& wheelDelta,
bool preciseWheel)
{
enqueueMessage(newMouseMessage(
kMouseWheelMessage,
(capture_widget ? capture_widget: mouse_widget),
mousePos, pointerType, mouseButtons, modifiers,
wheelDelta, preciseWheel));
}
void Manager::handleTouchMagnify(const gfx::Point& mousePos,
const KeyModifiers modifiers,
const double magnification)
{
Widget* widget = (capture_widget ? capture_widget: mouse_widget);
if (widget) {
Message* msg = new TouchMessage(
kTouchMagnifyMessage,
modifiers,
mousePos,
magnification);
msg->addRecipient(widget);
enqueueMessage(msg);
}
}
// Handles Z order: Send the window to top (only when you click in a
// window that aren't the desktop).
void Manager::handleWindowZOrder()
{
if (capture_widget || !mouse_widget)
return;
// The clicked window
Window* window = mouse_widget->window();
Manager* win_manager = (window ? window->manager(): NULL);
if ((window) &&
// We cannot change Z-order of desktop windows
(!window->isDesktop()) &&
// We cannot change Z order of foreground windows because a
// foreground window can launch other background windows
// which should be kept on top of the foreground one.
(!window->isForeground()) &&
// If the window is not already the top window of the manager.
(window != win_manager->getTopWindow())) {
base::ScopedValue<Widget*> scoped(m_lockedWindow, window, NULL);
// Put it in the top of the list
win_manager->removeChild(window);
if (window->isOnTop())
win_manager->insertChild(0, window);
else {
int pos = (int)win_manager->children().size();
UI_FOREACH_WIDGET_BACKWARD(win_manager->children(), it) {
if (static_cast<Window*>(*it)->isOnTop())
break;
--pos;
}
win_manager->insertChild(pos, window);
}
window->invalidate();
}
// Put the focus
setFocus(mouse_widget);
}
void Manager::dispatchMessages()
{
// Send messages in the queue (mouse/key/timer/etc. events) This
// might change the state of widgets, etc. In case pumpQueue()
// returns a number greater than 0, it means that we've processed
// some messages, so we've to redraw the screen.
if (pumpQueue() > 0) {
// Generate and send just kPaintMessages with the latest UI state.
flushRedraw();
pumpQueue();
}
// Flip the back-buffer to the real display.
flipDisplay();
}
void Manager::addToGarbage(Widget* widget)
{
m_garbage.push_back(widget);
}
void Manager::enqueueMessage(Message* msg)
{
ASSERT(msg);
if (is_ui_thread())
msg_queue.push_back(msg);
else
concurrent_msg_queue.push(msg);
}
Window* Manager::getTopWindow()
{
return static_cast<Window*>(UI_FIRST_WIDGET(children()));
}
Window* Manager::getForegroundWindow()
{
for (auto child : children()) {
Window* window = static_cast<Window*>(child);
if (window->isForeground() ||
window->isDesktop())
return window;
}
return nullptr;
}
Widget* Manager::getFocus()
{
return focus_widget;
}
Widget* Manager::getMouse()
{
return mouse_widget;
}
Widget* Manager::getCapture()
{
return capture_widget;
}
void Manager::setFocus(Widget* widget)
{
if ((focus_widget != widget)
&& (!(widget)
|| (!(widget->hasFlags(DISABLED))
&& !(widget->hasFlags(HIDDEN))
&& !(widget->hasFlags(DECORATIVE))
&& someParentIsFocusStop(widget)))) {
WidgetsList widget_parents;
Widget* common_parent = NULL;
if (widget)
widget->getParents(false, widget_parents);
// Fetch the focus
if (focus_widget) {
WidgetsList focus_parents;
focus_widget->getParents(true, focus_parents);
Message* msg = new Message(kFocusLeaveMessage);
for (Widget* parent1 : focus_parents) {
if (widget) {
for (Widget* parent2 : widget_parents) {
if (parent1 == parent2) {
common_parent = parent1;
break;
}
}
if (common_parent)
break;
}
if (parent1->hasFocus()) {
parent1->disableFlags(HAS_FOCUS);
msg->addRecipient(parent1);
}
}
enqueueMessage(msg);
}
// Put the focus
focus_widget = widget;
if (widget) {
WidgetsList::iterator it;
if (common_parent) {
it = std::find(widget_parents.begin(),
widget_parents.end(),
common_parent);
ASSERT(it != widget_parents.end());
++it;
}
else
it = widget_parents.begin();
Message* msg = new Message(kFocusEnterMessage);
for (; it != widget_parents.end(); ++it) {
Widget* w = *it;
if (w->hasFlags(FOCUS_STOP)) {
w->enableFlags(HAS_FOCUS);
msg->addRecipient(w);
}
}
enqueueMessage(msg);
}
}
}
void Manager::setMouse(Widget* widget)
{
#ifdef REPORT_EVENTS
std::cout << "Manager::setMouse ";
if (widget) {
std::cout << typeid(*widget).name();
if (!widget->id().empty())
std::cout << " (" << widget->id() << ")";
}
else {
std::cout << "null";
}
std::cout << std::endl;
#endif
if ((mouse_widget != widget) && (!capture_widget)) {
WidgetsList widget_parents;
Widget* common_parent = NULL;
if (widget)
widget->getParents(false, widget_parents);
// Fetch the mouse
if (mouse_widget) {
WidgetsList mouse_parents;
mouse_widget->getParents(true, mouse_parents);
Message* msg = new Message(kMouseLeaveMessage);
for (Widget* parent1 : mouse_parents) {
if (widget) {
for (Widget* parent2 : widget_parents) {
if (parent1 == parent2) {
common_parent = parent1;
break;
}
}
if (common_parent)
break;
}
if (parent1->hasMouse()) {
parent1->disableFlags(HAS_MOUSE);
msg->addRecipient(parent1);
}
}
enqueueMessage(msg);
}
// Put the mouse
mouse_widget = widget;
if (widget) {
WidgetsList::iterator it;
if (common_parent) {
it = std::find(widget_parents.begin(),
widget_parents.end(),
common_parent);
ASSERT(it != widget_parents.end());
++it;
}
else
it = widget_parents.begin();
Message* msg = newMouseMessage(
kMouseEnterMessage, NULL,
get_mouse_position(),
PointerType::Unknown,
_internal_get_mouse_buttons(),
kKeyUninitializedModifier);
for (; it != widget_parents.end(); ++it) {
(*it)->enableFlags(HAS_MOUSE);
msg->addRecipient(*it);
}
enqueueMessage(msg);
generateSetCursorMessage(get_mouse_position(),
kKeyUninitializedModifier,
PointerType::Unknown);
}
}
}
void Manager::setCapture(Widget* widget)
{
// To set the capture, we set first the mouse_widget (because
// mouse_widget shouldn't be != capture_widget)
setMouse(widget);
widget->enableFlags(HAS_CAPTURE);
capture_widget = widget;
m_display->captureMouse();
}
// Sets the focus to the "magnetic" widget inside the window
void Manager::attractFocus(Widget* widget)
{
// Get the magnetic widget
Widget* magnet = findMagneticWidget(widget->window());
// If magnetic widget exists and it doesn't have the focus
if (magnet && !magnet->hasFocus())
setFocus(magnet);
}
void Manager::focusFirstChild(Widget* widget)
{
for (Widget* it=widget->window(); it; it=next_widget(it)) {
if (ACCEPT_FOCUS(it) && !(child_accept_focus(it, true))) {
setFocus(it);
break;
}
}
}
void Manager::freeFocus()
{
setFocus(NULL);
}
void Manager::freeMouse()
{
setMouse(NULL);
}
void Manager::freeCapture()
{
if (capture_widget) {
capture_widget->disableFlags(HAS_CAPTURE);
capture_widget = NULL;
m_display->releaseMouse();
}
}
void Manager::freeWidget(Widget* widget)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_handle());
#endif
if (widget->hasFocus() || (widget == focus_widget))
freeFocus();
// We shouldn't free widgets that are locked, it means, widgets that
// will be re-added soon (e.g. when the stack of windows is
// temporarily modified).
if (m_lockedWindow == widget)
return;
// Break any relationship with the GUI manager
if (widget->hasCapture() || (widget == capture_widget))
freeCapture();
if (widget->hasMouse() || (widget == mouse_widget))
freeMouse();
auto it = std::find(mouse_widgets_list.begin(),
mouse_widgets_list.end(),
widget);
if (it != mouse_widgets_list.end())
mouse_widgets_list.erase(it);
ASSERT(!Manager::widgetAssociatedToManager(widget));
}
void Manager::removeMessage(Message* msg)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_handle());
#endif
auto it = std::find(msg_queue.begin(), msg_queue.end(), msg);
ASSERT(it != msg_queue.end());
msg_queue.erase(it);
}
void Manager::removeMessagesFor(Widget* widget)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_handle());
#endif
for (Message* msg : msg_queue)
removeWidgetFromRecipients(widget, msg);
}
void Manager::removeMessagesFor(Widget* widget, MessageType type)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_handle());
#endif
for (Message* msg : msg_queue)
if (msg->type() == type)
removeWidgetFromRecipients(widget, msg);
}
void Manager::removeMessagesForTimer(Timer* timer)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_handle());
#endif
for (auto it=msg_queue.begin(); it != msg_queue.end(); ) {
Message* msg = *it;
if (!msg->isUsed() &&
msg->type() == kTimerMessage &&
static_cast<TimerMessage*>(msg)->timer() == timer) {
delete msg;
it = msg_queue.erase(it);
}
else
++it;
}
}
void Manager::addMessageFilter(int message, Widget* widget)
{
#ifdef DEBUG_UI_THREADS
ASSERT(manager_thread == base::this_thread::native_handle());
#endif
LockFilters lock;
int c = message;
if (c >= kFirstRegisteredMessage)
c = kFirstRegisteredMessage;
msg_filters[c].push_back(new Filter(message, widget));
}