tdesktop/Telegram/SourceFiles/core/click_handler.cpp

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "core/click_handler.h"
ClickHandlerHost::~ClickHandlerHost() {
ClickHandler::hostDestroyed(this);
}
NeverFreedPointer<ClickHandlerPtr> ClickHandler::_active;
NeverFreedPointer<ClickHandlerPtr> ClickHandler::_pressed;
ClickHandlerHost *ClickHandler::_activeHost = nullptr;
ClickHandlerHost *ClickHandler::_pressedHost = nullptr;
bool ClickHandler::setActive(const ClickHandlerPtr &p, ClickHandlerHost *host) {
if ((_active && (*_active == p)) || (!_active && !p)) {
return false;
}
// emit clickHandlerActiveChanged only when there is no
// other pressed click handler currently, if there is
// this method will be called when it is unpressed
if (_active && *_active) {
const auto emitClickHandlerActiveChanged = false
|| !_pressed
|| !*_pressed
|| (*_pressed == *_active);
const auto wasactive = base::take(*_active);
if (_activeHost) {
if (emitClickHandlerActiveChanged) {
_activeHost->clickHandlerActiveChanged(wasactive, false);
}
_activeHost = nullptr;
}
}
if (p) {
_active.createIfNull();
*_active = p;
if ((_activeHost = host)) {
bool emitClickHandlerActiveChanged = (!_pressed || !*_pressed || *_pressed == *_active);
if (emitClickHandlerActiveChanged) {
_activeHost->clickHandlerActiveChanged(*_active, true);
}
}
}
return true;
}
auto ClickHandler::getTextEntity() const -> TextEntity {
return { EntityType::Invalid };
}