/*

 * Copyright (C) 2006, 2007 Apple 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:

 * 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 COMPUTER, INC. ``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 COMPUTER, INC. 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 "config.h"

#include "Pasteboard.h"

#include "ClipboardUtilitiesWin.h"

#include "CString.h"

#include "DeprecatedString.h"

#include "DocumentFragment.h"

#include "Document.h"

#include "Element.h"

#include "Frame.h"

#include "HitTestResult.h"

#include "Image.h"

#include "KURL.h"

#include "NotImplemented.h"

#include "Page.h"

#include "Range.h"

#include "RenderImage.h"

#include "TextEncoding.h"

#include "markup.h"

namespace WebCore {

static UINT HTMLClipboardFormat = 0;

static UINT BookmarkClipboardFormat = 0;

static UINT WebSmartPasteFormat = 0;

static LRESULT CALLBACK PasteboardOwnerWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

{

    LRESULT lresult = 0;

    LONG_PTR longPtr = GetWindowLongPtr(hWnd, 0);

    switch(message) {

    case WM_RENDERFORMAT:

        // This message comes when SetClipboardData was sent a null data handle 

        // and now it's come time to put the data on the clipboard.

        break;

    case WM_RENDERALLFORMATS:

        // This message comes when SetClipboardData was sent a null data handle

        // and now this application is about to quit, so it must put data on 

        // the clipboard before it exits.

        break;

    case WM_DRAWCLIPBOARD:

        break;

    case WM_DESTROY:

        break;

    case WM_CHANGECBCHAIN:

        break;

    default:

        lresult = DefWindowProc(hWnd, message, wParam, lParam);

        break;

    }

    return lresult;

}

Pasteboard* Pasteboard::generalPasteboard() 

{

    static Pasteboard* pasteboard = new Pasteboard;

    return pasteboard;

}

Pasteboard::Pasteboard()

{ 

    // make a dummy HWND to be the Windows clipboard's owner

    WNDCLASSEX wcex = {0};

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.lpfnWndProc    = PasteboardOwnerWndProc;

    wcex.hInstance      = Page::instanceHandle();

    wcex.lpszClassName  = L"PasteboardOwnerWindowClass";

    ::RegisterClassEx(&wcex);

    m_owner = ::CreateWindow(L"PasteboardOwnerWindowClass", L"PasteboardOwnerWindow", 0, 0, 0, 0, 0,

        HWND_MESSAGE, 0, 0, 0);

    HTMLClipboardFormat = ::RegisterClipboardFormat(L"HTML Format");

    BookmarkClipboardFormat = ::RegisterClipboardFormat(L"UniformResourceLocatorW");

    WebSmartPasteFormat = ::RegisterClipboardFormat(L"WebKit Smart Paste Format");

}

void Pasteboard::clear()

{

    if (::OpenClipboard(m_owner)) {

        ::EmptyClipboard();

        ::CloseClipboard();

    }

}

void Pasteboard::writeSelection(Range* selectedRange, bool canSmartCopyOrDelete, Frame* frame)

{

    clear();

    // Put CF_HTML format on the pasteboard 

    if (::OpenClipboard(m_owner)) {

        ExceptionCode ec = 0;

        HGLOBAL cbData = createGlobalData(markupToCF_HTML(createMarkup(selectedRange, 0, AnnotateForInterchange), selectedRange->startContainer(ec)->document()->URL()));

        if (!::SetClipboardData(HTMLClipboardFormat, cbData))

            ::GlobalFree(cbData);

        ::CloseClipboard();

    }

    // Put plain string on the pasteboard. CF_UNICODETEXT covers CF_TEXT as well

    String str = frame->selectedText();

    replaceNewlinesWithWindowsStyleNewlines(str);

    replaceNBSPWithSpace(str);

    if (::OpenClipboard(m_owner)) {

        HGLOBAL cbData = createGlobalData(str);

        if (!::SetClipboardData(CF_UNICODETEXT, cbData))

            ::GlobalFree(cbData);

        ::CloseClipboard();

    }

    // enable smart-replacing later on by putting dummy data on the pasteboard

    if (canSmartCopyOrDelete) {

        if (::OpenClipboard(m_owner)) {

            ::SetClipboardData(WebSmartPasteFormat, NULL);

            ::CloseClipboard();

        }

    }

}

void Pasteboard::writeURL(const KURL& url, const String& titleStr, Frame* frame)

{

    ASSERT(!url.isEmpty());

    clear();

    String title(titleStr);

    if (title.isEmpty()) {

        title = url.lastPathComponent();

        if (title.isEmpty())

            title = url.host();

    }

    // write to clipboard in format com.apple.safari.bookmarkdata to be able to paste into the bookmarks view with appropriate title

    if (::OpenClipboard(m_owner)) {

        HGLOBAL cbData = createGlobalData(url, title);

        if (!::SetClipboardData(BookmarkClipboardFormat, cbData))

            ::GlobalFree(cbData);

        ::CloseClipboard();

    }

    // write to clipboard in format CF_HTML to be able to paste into contenteditable areas as a link

    if (::OpenClipboard(m_owner)) {

        HGLOBAL cbData = createGlobalData(markupToCF_HTML(urlToMarkup(url, title), ""));

        if (!::SetClipboardData(HTMLClipboardFormat, cbData))

            ::GlobalFree(cbData);

        ::CloseClipboard();

    }

    // bare-bones CF_UNICODETEXT support

    if (::OpenClipboard(m_owner)) {

        HGLOBAL cbData = createGlobalData(url.url());

        if (!::SetClipboardData(CF_UNICODETEXT, cbData))

            ::GlobalFree(cbData);

        ::CloseClipboard();

    }

}

void Pasteboard::writeImage(Node* node, const KURL&, const String&)

{

    ASSERT(node && node->renderer() && node->renderer()->isImage());

    RenderImage* renderer = static_cast<RenderImage*>(node->renderer());

    CachedImage* cachedImage = static_cast<CachedImage*>(renderer->cachedImage());

    ASSERT(cachedImage);

    Image* image = cachedImage->image();

    ASSERT(image);

    clear();

    HDC dc = GetDC(0);

    HDC compatibleDC = CreateCompatibleDC(0);

    HDC sourceDC = CreateCompatibleDC(0);

    HBITMAP resultBitmap = CreateCompatibleBitmap(dc, image->width(), image->height());

    HBITMAP oldBitmap = (HBITMAP)SelectObject(compatibleDC, resultBitmap);

    BITMAPINFO bmInfo = {0};

    bmInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);

    bmInfo.bmiHeader.biWidth = image->width();

    bmInfo.bmiHeader.biHeight = image->height();

    bmInfo.bmiHeader.biPlanes = 1;

    bmInfo.bmiHeader.biBitCount = 32;

    bmInfo.bmiHeader.biCompression = BI_RGB;

    HBITMAP coreBitmap = CreateDIBSection(dc, &bmInfo, DIB_RGB_COLORS, 0, 0, 0);

    HBITMAP oldSource = (HBITMAP)SelectObject(sourceDC, coreBitmap);

    image->getHBITMAP(coreBitmap);

    BLENDFUNCTION bf = {AC_SRC_OVER, 0, 255, AC_SRC_ALPHA};

    AlphaBlend(compatibleDC, 0, 0, image->width(), image->height(),

        sourceDC, 0, 0, image->width(), image->height(), bf);

    SelectObject(compatibleDC, oldBitmap);

    SelectObject(sourceDC, oldSource);

    DeleteObject(oldBitmap);

    DeleteObject(oldSource);

    DeleteObject(coreBitmap);

    ReleaseDC(0, dc);

    DeleteDC(compatibleDC);

    DeleteDC(sourceDC);

    if (::OpenClipboard(m_owner)) {

        ::SetClipboardData(CF_BITMAP, resultBitmap);

        ::CloseClipboard();

    }

}

bool Pasteboard::canSmartReplace()

{ 

    return ::IsClipboardFormatAvailable(WebSmartPasteFormat);

}

String Pasteboard::plainText(Frame* frame)

{

    if (::IsClipboardFormatAvailable(CF_UNICODETEXT) && ::OpenClipboard(m_owner)) {

        HANDLE cbData = ::GetClipboardData(CF_UNICODETEXT);

        if (cbData) {

            UChar* buffer = (UChar*)::GlobalLock(cbData);

            String fromClipboard(buffer);

            ::GlobalUnlock(cbData);

            ::CloseClipboard();

            return fromClipboard;

        } else

            ::CloseClipboard();

    }

    if (::IsClipboardFormatAvailable(CF_TEXT) && ::OpenClipboard(m_owner)) {

        HANDLE cbData = ::GetClipboardData(CF_TEXT);

        if (cbData) {

            char* buffer = (char*)::GlobalLock(cbData);

            String fromClipboard(buffer);

            ::GlobalUnlock(cbData);

            ::CloseClipboard();

            return fromClipboard;

        } else

            ::CloseClipboard();

    }

    return String();

}

PassRefPtr<DocumentFragment> Pasteboard::documentFragment(Frame* frame, PassRefPtr<Range> context, bool allowPlainText, bool& chosePlainText)

{

    chosePlainText = false;

    if (::IsClipboardFormatAvailable(HTMLClipboardFormat) && ::OpenClipboard(m_owner)) {

        // get data off of clipboard

        HANDLE cbData = ::GetClipboardData(HTMLClipboardFormat);

        if (cbData) {

            SIZE_T dataSize = ::GlobalSize(cbData);

            String cf_html(UTF8Encoding().decode((char*)::GlobalLock(cbData), dataSize));

            ::GlobalUnlock(cbData);

            ::CloseClipboard();

            PassRefPtr<DocumentFragment> fragment = fragmentFromCF_HTML(frame->document(), cf_html);

            if (fragment)

                return fragment;

        } else 

            ::CloseClipboard();

    }

    if (allowPlainText && ::IsClipboardFormatAvailable(CF_UNICODETEXT)) {

        chosePlainText = true;

        if (::OpenClipboard(m_owner)) {

            HANDLE cbData = ::GetClipboardData(CF_UNICODETEXT);

            if (cbData) {

                UChar* buffer = (UChar*)GlobalLock(cbData);

                String str(buffer);

                ::GlobalUnlock( cbData );

                ::CloseClipboard();

                RefPtr<DocumentFragment> fragment = createFragmentFromText(context.get(), str);

                if (fragment)

                    return fragment.release();

            } else 

                ::CloseClipboard();

        }

    }

    if (allowPlainText && ::IsClipboardFormatAvailable(CF_TEXT)) {

        chosePlainText = true;

        if (::OpenClipboard(m_owner)) {

            HANDLE cbData = ::GetClipboardData(CF_TEXT);

            if (cbData) {

                char* buffer = (char*)GlobalLock(cbData);

                String str(buffer);

                ::GlobalUnlock( cbData );

                ::CloseClipboard();

                RefPtr<DocumentFragment> fragment = createFragmentFromText(context.get(), str);

                if (fragment)

                    return fragment.release();

            } else

                ::CloseClipboard();

        }

    }

    return 0;

}

} // namespace WebCore