Tools/MiniBrowser/fuchsia/FuchsiaCursor.cpp

/*
 * Copyright 2016 The Fuchsia Authors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "FuchsiaCursor.h"

#include "FuchsiaInputHandler.h"

namespace Fuchsia {

using namespace std;

Cursor::Cursor()
    : Cursor(1024, 768)
{
}

Cursor::Cursor(int maxX, int maxY)
    : fMaxX(maxX)
    , fMaxY(maxY)
    , fX(0)
    , fY(0)
    , fButtons(0)
{
}

Cursor::ButtonActions Cursor::handleEvent(const MouseEvent& evt)
{
    ButtonActions actions;
    fX += evt.fDeltaX;
    fX = std::max(fX, 0);
    fX = std::min(fX, fMaxX);
    fY += evt.fDeltaY;
    fY = std::max(fY, 0);
    fY = std::min(fY, fMaxY);
    bitset<8> newButtons(evt.fButtons);
    for (int i = 0; i < kBitCount; ++i) {
        if (newButtons[i] != fButtons[i]) {
            if (newButtons[i]) {
                actions[i] = ButtonAction::kDown;
            } else {
                actions[i] = ButtonAction::kUp;
            }
        } else {
            actions[i] = ButtonAction::kNoChange;
        }
    }
    fButtons = newButtons;
    return actions;
}
}