clipboardwin.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * 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 "ClipboardWin.h"

#include "CString.h"
#include "CachedImage.h"
#include "ClipboardUtilitiesWin.h"
#include "Document.h"
#include "DragData.h"
#include "Editor.h"
#include "Element.h"
#include "EventHandler.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameView.h"
#include "HTMLNames.h"
#include "Image.h"
#include "MIMETypeRegistry.h"
#include "Page.h"
#include "Pasteboard.h"
#include "PlatformMouseEvent.h"
#include "PlatformString.h"
#include "Range.h"
#include "RenderImage.h"
#include "ResourceResponse.h"
#include "StringHash.h"
#include "WCDataObject.h"
#include "csshelper.h"
#include "markup.h"

#include <shlwapi.h>
#include <wininet.h>

#include <wtf/RefPtr.h>

using namespace std;

namespace WebCore {

using namespace HTMLNames;

// format string for 
static const char szShellDotUrlTemplate[] = "[InternetShortcut]\r\nURL=%s\r\n";

// We provide the IE clipboard types (URL and Text), and the clipboard types specified in the WHATWG Web Applications 1.0 draft
// see http://www.whatwg.org/specs/web-apps/current-work/ Section 6.3.5.3

enum ClipboardDataType { ClipboardDataTypeNone, ClipboardDataTypeURL, ClipboardDataTypeText };

static ClipboardDataType clipboardTypeFromMIMEType(const String& type)
{
    String qType = type.stripWhiteSpace().lower();

    // two special cases for IE compatibility
    if (qType == "text" || qType == "text/plain" || qType.startsWith("text/plain;"))
        return ClipboardDataTypeText;
    if (qType == "url" || qType == "text/uri-list")
        return ClipboardDataTypeURL;

    return ClipboardDataTypeNone;
}

static inline FORMATETC* fileDescriptorFormat()
{
    static UINT cf = RegisterClipboardFormat(CFSTR_FILEDESCRIPTOR);
    static FORMATETC fileDescriptorFormat = {cf, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
    return &fileDescriptorFormat;
}

static inline FORMATETC* fileContentFormatZero()
{
    static UINT cf = RegisterClipboardFormat(CFSTR_FILECONTENTS);
    static FORMATETC fileContentFormat = {cf, 0, DVASPECT_CONTENT, 0, TYMED_HGLOBAL};
    return &fileContentFormat;
}

static inline void pathRemoveBadFSCharacters(PWSTR psz, size_t length)
{
    size_t writeTo = 0;
    size_t readFrom = 0;
    while (readFrom < length) {
        UINT type = PathGetCharType(psz[readFrom]);
        if (psz[readFrom] == 0 || type & (GCT_LFNCHAR | GCT_SHORTCHAR)) {
            psz[writeTo++] = psz[readFrom];
        }

        readFrom++;
    }
    psz[writeTo] = 0;
}

static String filesystemPathFromUrlOrTitle(const String& url, const String& title, TCHAR* extension, bool isLink)
{
    bool usedURL = false;
    WCHAR fsPathBuffer[MAX_PATH + 1];
    fsPathBuffer[0] = 0;
    int extensionLen = extension ? lstrlen(extension) : 0;

    if (!title.isEmpty()) {
        size_t len = min<size_t>(title.length(), MAX_PATH - extensionLen);
        CopyMemory(fsPathBuffer, title.characters(), len * sizeof(UChar));
        fsPathBuffer[len] = 0;
        pathRemoveBadFSCharacters(fsPathBuffer, len);
    }

    if (!lstrlen(fsPathBuffer)) {
        DWORD len = MAX_PATH;
        String nullTermURL = url;
        usedURL = true;
        if (UrlIsFileUrl((LPCWSTR)nullTermURL.charactersWithNullTermination()) 
            && SUCCEEDED(PathCreateFromUrl((LPCWSTR)nullTermURL.charactersWithNullTermination(), fsPathBuffer, &len, 0))) {
            // When linking to a file URL we can trivially find the file name
            PWSTR fn = PathFindFileName(fsPathBuffer);
            if (fn && fn != fsPathBuffer)
                lstrcpyn(fsPathBuffer, fn, lstrlen(fn) + 1);
        } else {
            // The filename for any content based drag should be the last element of 
            // the path.  If we can't find it, or we're coming up with the name for a link
            // we just use the entire url.
            KURL kurl(url);
            String lastComponent;
            if (!isLink && !(lastComponent = kurl.lastPathComponent()).isEmpty()) {
                len = min<DWORD>(MAX_PATH, lastComponent.length());
                CopyMemory(fsPathBuffer, lastComponent.characters(), len * sizeof(UChar));
            } else {
                len = min<DWORD>(MAX_PATH, nullTermURL.length());
                CopyMemory(fsPathBuffer, nullTermURL.characters(), len * sizeof(UChar));
            }
            fsPathBuffer[len] = 0;
            pathRemoveBadFSCharacters(fsPathBuffer, len);
        }
    }

    if (!extension)
        return String((UChar*)fsPathBuffer);

    if (!isLink && usedURL) {
        PathRenameExtension(fsPathBuffer, extension);
        return String((UChar*)fsPathBuffer);
    }

    String result((UChar*)fsPathBuffer);
    result += String((UChar*)extension);
    return result;
}

static HGLOBAL createGlobalURLContent(const String& url, int estimatedFileSize)
{
    HRESULT hr = S_OK;
    HGLOBAL memObj = 0;

    char* fileContents;
    char ansiUrl[INTERNET_MAX_URL_LENGTH + 1];
    // Used to generate the buffer. This is null terminated whereas the fileContents won't be.
    char contentGenerationBuffer[INTERNET_MAX_URL_LENGTH + ARRAYSIZE(szShellDotUrlTemplate) + 1];
    
    if (estimatedFileSize > 0 && estimatedFileSize > ARRAYSIZE(contentGenerationBuffer))
        return 0;

    int ansiUrlSize = ::WideCharToMultiByte(CP_ACP, 0, (LPCWSTR)url.characters(), url.length(), ansiUrl, ARRAYSIZE(ansiUrl) - 1, 0, 0);
    if (!ansiUrlSize)
        return 0;

    ansiUrl[ansiUrlSize] = 0;
    
    int fileSize = (int) (ansiUrlSize+strlen(szShellDotUrlTemplate)-2); // -2 to remove the %s
    ASSERT(estimatedFileSize < 0 || fileSize == estimatedFileSize);

    memObj = GlobalAlloc(GPTR, fileSize);
    if (!memObj) 
        return 0;

    fileContents = (PSTR)GlobalLock(memObj);

    sprintf_s(contentGenerationBuffer, ARRAYSIZE(contentGenerationBuffer), szShellDotUrlTemplate, ansiUrl);
    CopyMemory(fileContents, contentGenerationBuffer, fileSize);
    
    GlobalUnlock(memObj);
    
    return memObj;
}

static HGLOBAL createGlobalImageFileContent(SharedBuffer* data)
{
    HGLOBAL memObj = GlobalAlloc(GPTR, data->size());
    if (!memObj) 
        return 0;

    char* fileContents = (PSTR)GlobalLock(memObj);

    CopyMemory(fileContents, data->data(), data->size());
    
    GlobalUnlock(memObj);
    
    return memObj;
}

static HGLOBAL createGlobalHDropContent(const KURL& url, String& fileName, SharedBuffer* data)
{
    if (fileName.isEmpty() || !data )
        return 0;

    WCHAR filePath[MAX_PATH];

    if (url.isLocalFile()) {
        String localPath = url.path();
        // windows does not enjoy a leading slash on paths
        if (localPath[0] == '/')
            localPath = localPath.substring(1);
        LPCTSTR localPathStr = localPath.charactersWithNullTermination();
        if (wcslen(localPathStr) + 1 < MAX_PATH)
            wcscpy_s(filePath, MAX_PATH, localPathStr);
        else
            return 0;
    } else {
        WCHAR tempPath[MAX_PATH];
        WCHAR extension[MAX_PATH];
        if (!::GetTempPath(ARRAYSIZE(tempPath), tempPath))
            return 0;
        if (!::PathAppend(tempPath, fileName.charactersWithNullTermination()))
            return 0;
        LPCWSTR foundExtension = ::PathFindExtension(tempPath);
        if (foundExtension) {
            if (wcscpy_s(extension, MAX_PATH, foundExtension))
                return 0;
        } else
            *extension = 0;
        ::PathRemoveExtension(tempPath);
        for (int i = 1; i < 10000; i++) {
            if (swprintf_s(filePath, MAX_PATH, TEXT("%s-%d%s"), tempPath, i, extension) == -1)
                return 0;
            if (!::PathFileExists(filePath))
                break;
        }
        HANDLE tempFileHandle = CreateFile(filePath, GENERIC_READ | GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
        if (tempFileHandle == INVALID_HANDLE_VALUE)
            return 0;

        // Write the data to this temp file.
        DWORD written;
        BOOL tempWriteSucceeded = WriteFile(tempFileHandle, data->data(), data->size(), &written, 0);
        CloseHandle(tempFileHandle);
        if (!tempWriteSucceeded)
            return 0;
    }

    SIZE_T dropFilesSize = sizeof(DROPFILES) + (sizeof(WCHAR) * (wcslen(filePath) + 2));
    HGLOBAL memObj = GlobalAlloc(GHND | GMEM_SHARE, dropFilesSize);
    if (!memObj) 
        return 0;

    DROPFILES* dropFiles = (DROPFILES*) GlobalLock(memObj);
    dropFiles->pFiles = sizeof(DROPFILES);
    dropFiles->fWide = TRUE;
    wcscpy((LPWSTR)(dropFiles + 1), filePath);    
    GlobalUnlock(memObj);
    
    return memObj;
}

static HGLOBAL createGlobalUrlFileDescriptor(const String& url, const String& title, int& /*out*/ estimatedSize)
{
    HRESULT hr = S_OK;
    HGLOBAL memObj = 0;
    String fsPath;
    memObj = GlobalAlloc(GPTR, sizeof(FILEGROUPDESCRIPTOR));
    if (!memObj)
        return 0;

    FILEGROUPDESCRIPTOR* fgd = (FILEGROUPDESCRIPTOR*)GlobalLock(memObj);
    memset(fgd, 0, sizeof(FILEGROUPDESCRIPTOR));
    fgd->cItems = 1;
    fgd->fgd[0].dwFlags = FD_FILESIZE;
    int fileSize = ::WideCharToMultiByte(CP_ACP, 0, url.characters(), url.length(), 0, 0, 0, 0);
    fileSize += strlen(szShellDotUrlTemplate) - 2;  // -2 is for getting rid of %s in the template string
    fgd->fgd[0].nFileSizeLow = fileSize;
    estimatedSize = fileSize;
    fsPath = filesystemPathFromUrlOrTitle(url, title, L".URL", true);

    if (fsPath.length() <= 0) {
        GlobalUnlock(memObj);
        GlobalFree(memObj);
        return 0;
    }

    int maxSize = min(fsPath.length(), ARRAYSIZE(fgd->fgd[0].cFileName));
    CopyMemory(fgd->fgd[0].cFileName, (LPCWSTR)fsPath.characters(), maxSize * sizeof(UChar));
    GlobalUnlock(memObj);
    
    return memObj;
}


static HGLOBAL createGlobalImageFileDescriptor(const String& url, const String& title, CachedImage* image)
{
    ASSERT_ARG(image, image);
    ASSERT(image->image()->data());

    HRESULT hr = S_OK;
    HGLOBAL memObj = 0;
    String fsPath;
    memObj = GlobalAlloc(GPTR, sizeof(FILEGROUPDESCRIPTOR));
    if (!memObj)
        return 0;

    FILEGROUPDESCRIPTOR* fgd = (FILEGROUPDESCRIPTOR*)GlobalLock(memObj);
    memset(fgd, 0, sizeof(FILEGROUPDESCRIPTOR));
    fgd->cItems = 1;
    fgd->fgd[0].dwFlags = FD_FILESIZE;
    fgd->fgd[0].nFileSizeLow = image->image()->data()->size();
    
    const String& preferredTitle = title.isEmpty() ? image->response().suggestedFilename() : title;
    String extension = image->image()->filenameExtension();
    if (extension.isEmpty()) {
        // Do not continue processing in the rare and unusual case where a decoded image is not able 
        // to provide a filename extension. Something tricky (like a bait-n-switch) is going on
        return 0;
    }
    extension.insert(".", 0);
    fsPath = filesystemPathFromUrlOrTitle(url, preferredTitle, (TCHAR*)extension.charactersWithNullTermination(), false);

    if (fsPath.length() <= 0) {
        GlobalUnlock(memObj);
        GlobalFree(memObj);
        return 0;
    }

    int maxSize = min(fsPath.length(), ARRAYSIZE(fgd->fgd[0].cFileName));
    CopyMemory(fgd->fgd[0].cFileName, (LPCWSTR)fsPath.characters(), maxSize * sizeof(UChar));
    GlobalUnlock(memObj);
    
    return memObj;
}


// writeFileToDataObject takes ownership of fileDescriptor and fileContent
static HRESULT writeFileToDataObject(IDataObject* dataObject, HGLOBAL fileDescriptor, HGLOBAL fileContent, HGLOBAL hDropContent)
{
    HRESULT hr = S_OK;
    FORMATETC* fe;
    STGMEDIUM medium = {0};
    medium.tymed = TYMED_HGLOBAL;

    if (!fileDescriptor || !fileContent)
        goto exit;

    // Descriptor
    fe = fileDescriptorFormat();

    medium.hGlobal = fileDescriptor;

    if (FAILED(hr = dataObject->SetData(fe, &medium, TRUE)))
        goto exit;

    // Contents
    fe = fileContentFormatZero();
    medium.hGlobal = fileContent;
    if (FAILED(hr = dataObject->SetData(fe, &medium, TRUE)))
        goto exit;

    // HDROP
    if (hDropContent) {
        medium.hGlobal = hDropContent;