/*
 * Copyright (C) 2010 Apple Inc. All rights reserved.
 * Portions Copyright (c) 2010 Motorola Mobility, Inc.  All rights reserved.
 * Copyright (C) 2011 Igalia S.L.
 *
 * 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "config.h"
#include "WebPage.h"

#include "EditorState.h"
#include "NotImplemented.h"
#include "WebEvent.h"
#include "WebFrame.h"
#include "WebPageAccessibilityObject.h"
#include "WebPageProxyMessages.h"
#include "WebProcess.h"
#include "WindowsKeyboardCodes.h"
#include <WebCore/BackForwardController.h>
#include <WebCore/EventHandler.h>
#include <WebCore/FocusController.h>
#include <WebCore/Frame.h>
#include <WebCore/FrameView.h>
#include <WebCore/KeyboardEvent.h>
#include <WebCore/Page.h>
#include <WebCore/PasteboardHelper.h>
#include <WebCore/PlatformKeyboardEvent.h>
#include <WebCore/Settings.h>
#include <WebCore/UserAgent.h>
#include <wtf/glib/GUniquePtr.h>

using namespace WebCore;

namespace WebKit {

void WebPage::platformInitialize()
{
#if HAVE(ACCESSIBILITY)
    // Create the accessible object (the plug) that will serve as the
    // entry point to the Web process, and send a message to the UI
    // process to connect the two worlds through the accessibility
    // object there specifically placed for that purpose (the socket).
    m_accessibilityObject = adoptGRef(webPageAccessibilityObjectNew(this));
    GUniquePtr<gchar> plugID(atk_plug_get_id(ATK_PLUG(m_accessibilityObject.get())));
    send(Messages::WebPageProxy::BindAccessibilityTree(String(plugID.get())));
#endif
}

void WebPage::platformDetach()
{
}

void WebPage::platformEditorState(Frame& frame, EditorState& result, IncludePostLayoutDataHint shouldIncludePostLayoutData) const
{
    if (shouldIncludePostLayoutData == IncludePostLayoutDataHint::No) {
        result.isMissingPostLayoutData = true;
        return;
    }

    auto& postLayoutData = result.postLayoutData();
    postLayoutData.caretRectAtStart = frame.selection().absoluteCaretBounds();

    const VisibleSelection& selection = frame.selection().selection();
    if (selection.isNone())
        return;

    const Editor& editor = frame.editor();
    if (selection.isRange()) {
        if (editor.selectionHasStyle(CSSPropertyFontWeight, "bold") == TrueTriState)
            postLayoutData.typingAttributes |= AttributeBold;
        if (editor.selectionHasStyle(CSSPropertyFontStyle, "italic") == TrueTriState)
            postLayoutData.typingAttributes |= AttributeItalics;
        if (editor.selectionHasStyle(CSSPropertyWebkitTextDecorationsInEffect, "underline") == TrueTriState)
            postLayoutData.typingAttributes |= AttributeUnderline;
        if (editor.selectionHasStyle(CSSPropertyWebkitTextDecorationsInEffect, "line-through") == TrueTriState)
            postLayoutData.typingAttributes |= AttributeStrikeThrough;
    } else if (selection.isCaret()) {
        if (editor.selectionStartHasStyle(CSSPropertyFontWeight, "bold"))
            postLayoutData.typingAttributes |= AttributeBold;
        if (editor.selectionStartHasStyle(CSSPropertyFontStyle, "italic"))
            postLayoutData.typingAttributes |= AttributeItalics;
        if (editor.selectionStartHasStyle(CSSPropertyWebkitTextDecorationsInEffect, "underline"))
            postLayoutData.typingAttributes |= AttributeUnderline;
        if (editor.selectionStartHasStyle(CSSPropertyWebkitTextDecorationsInEffect, "line-through"))
            postLayoutData.typingAttributes |= AttributeStrikeThrough;
    }
}

#if HAVE(ACCESSIBILITY)
void WebPage::updateAccessibilityTree()
{
    if (!m_accessibilityObject)
        return;

    webPageAccessibilityObjectRefresh(m_accessibilityObject.get());
}
#endif

void WebPage::platformPreferencesDidChange(const WebPreferencesStore&)
{
    notImplemented();
}

bool WebPage::performDefaultBehaviorForKeyEvent(const WebKeyboardEvent& keyboardEvent)
{
    if (keyboardEvent.type() != WebEvent::KeyDown && keyboardEvent.type() != WebEvent::RawKeyDown)
        return false;

    switch (keyboardEvent.windowsVirtualKeyCode()) {
    case VK_SPACE:
        scroll(m_page.get(), keyboardEvent.shiftKey() ? ScrollUp : ScrollDown, ScrollByPage);
        break;
    case VK_LEFT:
        scroll(m_page.get(), ScrollLeft, ScrollByLine);
        break;
    case VK_RIGHT:
        scroll(m_page.get(), ScrollRight, ScrollByLine);
        break;
    case VK_UP:
        scroll(m_page.get(), ScrollUp, ScrollByLine);
        break;
    case VK_DOWN:
        scroll(m_page.get(), ScrollDown, ScrollByLine);
        break;
    case VK_HOME:
        scroll(m_page.get(), ScrollUp, ScrollByDocument);
        break;
    case VK_END:
        scroll(m_page.get(), ScrollDown, ScrollByDocument);
        break;
    case VK_PRIOR:
        scroll(m_page.get(), ScrollUp, ScrollByPage);
        break;
    case VK_NEXT:
        scroll(m_page.get(), ScrollDown, ScrollByPage);
        break;
    default:
        return false;
    }

    return true;
}

bool WebPage::platformHasLocalDataForURL(const URL&)
{
    notImplemented();
    return false;
}

String WebPage::cachedResponseMIMETypeForURL(const URL&)
{
    notImplemented();
    return String();
}

bool WebPage::platformCanHandleRequest(const ResourceRequest&)
{
    notImplemented();
    return false;
}

String WebPage::cachedSuggestedFilenameForURL(const URL&)
{
    notImplemented();
    return String();
}

RefPtr<SharedBuffer> WebPage::cachedResponseDataForURL(const URL&)
{
    notImplemented();
    return 0;
}

String WebPage::platformUserAgent(const URL& url) const
{
    if (url.isNull() || !m_page->settings().needsSiteSpecificQuirks())
        return String();

    return WebCore::standardUserAgentForURL(url);
}

#if HAVE(GTK_GESTURES)
void WebPage::getCenterForZoomGesture(const IntPoint& centerInViewCoordinates, IntPoint& result)
{
    result = mainFrameView()->rootViewToContents(centerInViewCoordinates);
    double scale = m_page->pageScaleFactor();
    result.scale(1 / scale, 1 / scale);
}
#endif

void WebPage::setInputMethodState(bool enabled)
{
    if (m_inputMethodEnabled == enabled)
        return;

    m_inputMethodEnabled = enabled;
    send(Messages::WebPageProxy::SetInputMethodState(enabled));
}

void WebPage::collapseSelectionInFrame(uint64_t frameID)
{
    WebFrame* frame = WebProcess::singleton().webFrame(frameID);
    if (!frame || !frame->coreFrame())
        return;

    // Collapse the selection without clearing it.
    const VisibleSelection& selection = frame->coreFrame()->selection().selection();
    frame->coreFrame()->selection().setBase(selection.extent(), selection.affinity());
}

} // namespace WebKit