/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * 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
 * OWNER 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,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "WebInputEventFactory.h"

#include "WebInputEvent.h"
#include "core/platform/chromium/KeyCodeConversion.h"
#include "platform/KeyboardCodes.h"
#include "wtf/Assertions.h"

namespace blink {

WebKeyboardEvent WebInputEventFactory::keyboardEvent(WebInputEvent::Type type,
                                                     int modifiers,
                                                     double timeStampSeconds,
                                                     int keycode,
                                                     WebUChar unicodeCharacter,
                                                     bool isSystemKey)
{
    WebKeyboardEvent result;

    result.type = type;
    result.modifiers = modifiers;
    result.timeStampSeconds = timeStampSeconds;
    int windowsKeyCode = WebCore::windowsKeyCodeForKeyEvent(keycode);
    result.windowsKeyCode = WebKeyboardEvent::windowsKeyCodeWithoutLocation(windowsKeyCode);
    result.modifiers |= WebKeyboardEvent::locationModifiersFromWindowsKeyCode(windowsKeyCode);
    result.nativeKeyCode = keycode;
    result.unmodifiedText[0] = unicodeCharacter;
    if (result.windowsKeyCode == WebCore::VKEY_RETURN) {
        // This is the same behavior as GTK:
        // We need to treat the enter key as a key press of character \r. This
        // is apparently just how webkit handles it and what it expects.
        result.unmodifiedText[0] = '\r';
    }
    result.text[0] = result.unmodifiedText[0];
    result.setKeyIdentifierFromWindowsKeyCode();
    result.isSystemKey = isSystemKey;

    return result;
}

WebMouseEvent WebInputEventFactory::mouseEvent(MouseEventType type,
                                               WebMouseEvent::Button button,
                                               double timeStampSeconds,
                                               int windowX,
                                               int windowY,
                                               int modifiers,
                                               int clickCount)
{
    WebMouseEvent result;

    result.x = windowX;
    result.y = windowY;
    result.windowX = windowX;
    result.windowY = windowY;
    result.timeStampSeconds = timeStampSeconds;
    result.clickCount = clickCount;
    result.modifiers = modifiers;

    switch (type) {
    case MouseEventTypeDown:
        result.type = WebInputEvent::MouseDown;
        result.button = button;
        break;
    case MouseEventTypeUp:
        result.type = WebInputEvent::MouseUp;
        result.button = button;
        break;
    case MouseEventTypeMove:
        result.type = WebInputEvent::MouseMove;
        result.button = WebMouseEvent::ButtonNone;
        break;
    };

    return result;
}

bool WebInputEventFactory::isSystemKeyEvent(const WebKeyboardEvent& event)
{
    // On Windows all keys with Alt modifier will be marked as system key.
    // We keep the same behavior on Linux and everywhere non-Mac.
    return event.modifiers & WebInputEvent::AltKey;
}

// WebMouseWheelEvent ------------------------------------------------------------

WebMouseWheelEvent WebInputEventFactory::mouseWheelEvent(MouseWheelDirectionType direction,
                                                         double timeStampSeconds,
                                                         int windowX,
                                                         int windowY)
{
    WebMouseWheelEvent result;

    result.type = WebInputEvent::MouseWheel;
    result.x = windowX;
    result.y = windowY;
    result.windowX = windowX;
    result.windowY = windowY;
    result.timeStampSeconds = timeStampSeconds;
    result.button = WebMouseEvent::ButtonNone;

    // The below choices are matched from GTK.
    static const float scrollbarPixelsPerTick = 160.0f / 3.0f;

    switch (direction) {
    case MouseWheelDirectionTypeUp:
        result.deltaY = scrollbarPixelsPerTick;
        result.wheelTicksY = 1;
        break;
    case MouseWheelDirectionTypeDown:
        result.deltaY = -scrollbarPixelsPerTick;
        result.wheelTicksY = -1;
        break;
    case MouseWheelDirectionTypeLeft:
        result.deltaX = scrollbarPixelsPerTick;
        result.wheelTicksX = 1;
        break;
    case MouseWheelDirectionTypeRight:
        result.deltaX = -scrollbarPixelsPerTick;
        result.wheelTicksX = -1;
        break;
    }

    return result;
}

// WebGestureEvent ------------------------------------------------------------

// FIXME: remove this obsolete version
WebGestureEvent WebInputEventFactory::gestureEvent(WebInputEvent::Type type,
                                                   double timeStampSeconds,
                                                   int x,
                                                   int y,
                                                   float,
                                                   float,
                                                   int modifiers) {
    return gestureEvent(type, timeStampSeconds, x, y, modifiers);
}

WebGestureEvent WebInputEventFactory::gestureEvent(WebInputEvent::Type type,
                                                   double timeStampSeconds,
                                                   int x,
                                                   int y,
                                                   int modifiers)
{
    WebGestureEvent result;

    result.type = type;
    result.x = x;
    result.y = y;
    result.timeStampSeconds = timeStampSeconds;
    result.modifiers = modifiers;

    return result;
}

} // namespace blink