tdesktop/Telegram/SourceFiles/core/click_handler.cpp

79 lines
2.6 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop 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 3 of the License, or
(at your option) any later version.
It 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.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#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;
}
QString ClickHandler::getExpandedLinkText(ExpandLinksMode mode, const QStringRef &textPart) const {
return QString();
}
TextWithEntities ClickHandler::getExpandedLinkTextWithEntities(ExpandLinksMode mode, int entityOffset, const QStringRef &textPart) const {
return { QString(), EntitiesInText() };
}
TextWithEntities ClickHandler::simpleTextWithEntity(const EntityInText &entity) const {
TextWithEntities result;
result.entities.push_back(entity);
return result;
}