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			657 lines
		
	
	
		
			21 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			657 lines
		
	
	
		
			21 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
// Copyright (c) 2014 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#include "tests/cefclient/browser/osr_dragdrop_win.h"
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#if defined(CEF_USE_ATL)
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#include <shellapi.h>
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#include <shlobj.h>
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#include <windowsx.h>
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#include <algorithm>
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#include <string>
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#include "include/wrapper/cef_helpers.h"
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#include "tests/cefclient/browser/bytes_write_handler.h"
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#include "tests/cefclient/browser/resource.h"
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#include "tests/shared/browser/util_win.h"
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namespace client {
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namespace {
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DWORD DragOperationToDropEffect(CefRenderHandler::DragOperation allowed_ops) {
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  DWORD effect = DROPEFFECT_NONE;
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  if (allowed_ops & DRAG_OPERATION_COPY)
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    effect |= DROPEFFECT_COPY;
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  if (allowed_ops & DRAG_OPERATION_LINK)
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    effect |= DROPEFFECT_LINK;
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  if (allowed_ops & DRAG_OPERATION_MOVE)
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    effect |= DROPEFFECT_MOVE;
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  return effect;
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}
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CefRenderHandler::DragOperationsMask DropEffectToDragOperation(DWORD effect) {
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  DWORD operation = DRAG_OPERATION_NONE;
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  if (effect & DROPEFFECT_COPY)
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    operation |= DRAG_OPERATION_COPY;
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  if (effect & DROPEFFECT_LINK)
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    operation |= DRAG_OPERATION_LINK;
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  if (effect & DROPEFFECT_MOVE)
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    operation |= DRAG_OPERATION_MOVE;
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  return static_cast<CefRenderHandler::DragOperationsMask>(operation);
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}
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CefMouseEvent ToMouseEvent(POINTL p, DWORD key_state, HWND hWnd) {
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  CefMouseEvent ev;
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  POINT screen_point = {p.x, p.y};
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  ScreenToClient(hWnd, &screen_point);
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  ev.x = screen_point.x;
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  ev.y = screen_point.y;
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  ev.modifiers = GetCefMouseModifiers(key_state);
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  return ev;
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}
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void GetStorageForBytes(STGMEDIUM* storage, const void* data, size_t bytes) {
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  HANDLE handle = GlobalAlloc(GPTR, static_cast<int>(bytes));
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  if (handle) {
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    memcpy(handle, data, bytes);
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  }
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  storage->hGlobal = handle;
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  storage->tymed = TYMED_HGLOBAL;
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  storage->pUnkForRelease = NULL;
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}
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template <typename T>
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void GetStorageForString(STGMEDIUM* stgmed, const std::basic_string<T>& data) {
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  GetStorageForBytes(
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      stgmed, data.c_str(),
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      (data.size() + 1) * sizeof(typename std::basic_string<T>::value_type));
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}
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void GetStorageForFileDescriptor(STGMEDIUM* storage,
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                                 const std::wstring& file_name) {
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  DCHECK(!file_name.empty());
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  HANDLE hdata = GlobalAlloc(GPTR, sizeof(FILEGROUPDESCRIPTOR));
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  FILEGROUPDESCRIPTOR* descriptor =
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      reinterpret_cast<FILEGROUPDESCRIPTOR*>(hdata);
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  descriptor->cItems = 1;
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  descriptor->fgd[0].dwFlags = FD_LINKUI;
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  wcsncpy_s(descriptor->fgd[0].cFileName, MAX_PATH, file_name.c_str(),
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            std::min(file_name.size(), static_cast<size_t>(MAX_PATH - 1u)));
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  storage->tymed = TYMED_HGLOBAL;
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  storage->hGlobal = hdata;
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  storage->pUnkForRelease = NULL;
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}
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// Helper method for converting from text/html to MS CF_HTML.
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// Documentation for the CF_HTML format is available at
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// http://msdn.microsoft.com/en-us/library/aa767917(VS.85).aspx
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std::string HtmlToCFHtml(const std::string& html, const std::string& base_url) {
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  if (html.empty())
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    return std::string();
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#define MAX_DIGITS 10
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#define MAKE_NUMBER_FORMAT_1(digits) MAKE_NUMBER_FORMAT_2(digits)
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#define MAKE_NUMBER_FORMAT_2(digits) "%0" #digits "u"
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#define NUMBER_FORMAT MAKE_NUMBER_FORMAT_1(MAX_DIGITS)
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  static const char* header =
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      "Version:0.9\r\n"
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      "StartHTML:" NUMBER_FORMAT
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      "\r\n"
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      "EndHTML:" NUMBER_FORMAT
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      "\r\n"
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      "StartFragment:" NUMBER_FORMAT
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      "\r\n"
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      "EndFragment:" NUMBER_FORMAT "\r\n";
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  static const char* source_url_prefix = "SourceURL:";
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  static const char* start_markup = "<html>\r\n<body>\r\n<!--StartFragment-->";
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  static const char* end_markup = "<!--EndFragment-->\r\n</body>\r\n</html>";
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  // Calculate offsets
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  size_t start_html_offset =
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      strlen(header) - strlen(NUMBER_FORMAT) * 4 + MAX_DIGITS * 4;
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  if (!base_url.empty()) {
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    start_html_offset +=
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        strlen(source_url_prefix) + base_url.length() + 2;  // Add 2 for \r\n.
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  }
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  size_t start_fragment_offset = start_html_offset + strlen(start_markup);
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  size_t end_fragment_offset = start_fragment_offset + html.length();
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  size_t end_html_offset = end_fragment_offset + strlen(end_markup);
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  char raw_result[1024];
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  _snprintf(raw_result, sizeof(1024), header, start_html_offset,
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            end_html_offset, start_fragment_offset, end_fragment_offset);
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  std::string result = raw_result;
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  if (!base_url.empty()) {
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    result.append(source_url_prefix);
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    result.append(base_url);
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    result.append("\r\n");
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  }
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  result.append(start_markup);
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  result.append(html);
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  result.append(end_markup);
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#undef MAX_DIGITS
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#undef MAKE_NUMBER_FORMAT_1
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#undef MAKE_NUMBER_FORMAT_2
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#undef NUMBER_FORMAT
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  return result;
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}
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void CFHtmlExtractMetadata(const std::string& cf_html,
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                           std::string* base_url,
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                           size_t* html_start,
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                           size_t* fragment_start,
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                           size_t* fragment_end) {
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  // Obtain base_url if present.
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  if (base_url) {
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    static std::string src_url_str("SourceURL:");
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    size_t line_start = cf_html.find(src_url_str);
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    if (line_start != std::string::npos) {
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      size_t src_end = cf_html.find("\n", line_start);
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      size_t src_start = line_start + src_url_str.length();
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      if (src_end != std::string::npos && src_start != std::string::npos) {
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        *base_url = cf_html.substr(src_start, src_end - src_start);
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      }
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    }
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  }
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  // Find the markup between "<!--StartFragment-->" and "<!--EndFragment-->".
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  // If the comments cannot be found, like copying from OpenOffice Writer,
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  // we simply fall back to using StartFragment/EndFragment bytecount values
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  // to determine the fragment indexes.
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  std::string cf_html_lower = cf_html;
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  size_t markup_start = cf_html_lower.find("<html", 0);
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  if (html_start) {
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    *html_start = markup_start;
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  }
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  size_t tag_start = cf_html.find("<!--StartFragment", markup_start);
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  if (tag_start == std::string::npos) {
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    static std::string start_fragment_str("StartFragment:");
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    size_t start_fragment_start = cf_html.find(start_fragment_str);
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    if (start_fragment_start != std::string::npos) {
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      *fragment_start =
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          static_cast<size_t>(atoi(cf_html.c_str() + start_fragment_start +
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                                   start_fragment_str.length()));
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    }
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    static std::string end_fragment_str("EndFragment:");
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    size_t end_fragment_start = cf_html.find(end_fragment_str);
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    if (end_fragment_start != std::string::npos) {
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      *fragment_end = static_cast<size_t>(atoi(
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          cf_html.c_str() + end_fragment_start + end_fragment_str.length()));
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    }
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  } else {
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    *fragment_start = cf_html.find('>', tag_start) + 1;
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    size_t tag_end = cf_html.rfind("<!--EndFragment", std::string::npos);
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    *fragment_end = cf_html.rfind('<', tag_end);
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  }
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}
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void CFHtmlToHtml(const std::string& cf_html,
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                  std::string* html,
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                  std::string* base_url) {
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  size_t frag_start = std::string::npos;
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  size_t frag_end = std::string::npos;
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  CFHtmlExtractMetadata(cf_html, base_url, NULL, &frag_start, &frag_end);
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  if (html && frag_start != std::string::npos &&
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      frag_end != std::string::npos) {
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    *html = cf_html.substr(frag_start, frag_end - frag_start);
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  }
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}
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const DWORD moz_url_format = ::RegisterClipboardFormat(L"text/x-moz-url");
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const DWORD html_format = ::RegisterClipboardFormat(L"HTML Format");
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const DWORD file_desc_format = ::RegisterClipboardFormat(CFSTR_FILEDESCRIPTOR);
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const DWORD file_contents_format =
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    ::RegisterClipboardFormat(CFSTR_FILECONTENTS);
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bool DragDataToDataObject(CefRefPtr<CefDragData> drag_data,
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                          IDataObject** data_object) {
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  const int kMaxDataObjects = 10;
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  FORMATETC fmtetcs[kMaxDataObjects];
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  STGMEDIUM stgmeds[kMaxDataObjects];
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  FORMATETC fmtetc = {0, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
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  int curr_index = 0;
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  CefString text = drag_data->GetFragmentText();
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  if (!text.empty()) {
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    fmtetc.cfFormat = CF_UNICODETEXT;
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    fmtetcs[curr_index] = fmtetc;
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    GetStorageForString(&stgmeds[curr_index], text.ToWString());
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    curr_index++;
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  }
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  if (drag_data->IsLink() && !drag_data->GetLinkURL().empty()) {
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    std::wstring x_moz_url_str = drag_data->GetLinkURL().ToWString();
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    x_moz_url_str += '\n';
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    x_moz_url_str += drag_data->GetLinkTitle().ToWString();
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    fmtetc.cfFormat = moz_url_format;
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    fmtetcs[curr_index] = fmtetc;
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    GetStorageForString(&stgmeds[curr_index], x_moz_url_str);
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    curr_index++;
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  }
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  CefString html = drag_data->GetFragmentHtml();
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  if (!html.empty()) {
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    CefString base_url = drag_data->GetFragmentBaseURL();
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    std::string cfhtml = HtmlToCFHtml(html.ToString(), base_url.ToString());
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    fmtetc.cfFormat = html_format;
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    fmtetcs[curr_index] = fmtetc;
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    GetStorageForString(&stgmeds[curr_index], cfhtml);
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    curr_index++;
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  }
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  size_t bufferSize = drag_data->GetFileContents(NULL);
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  if (bufferSize) {
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    CefRefPtr<BytesWriteHandler> handler = new BytesWriteHandler(bufferSize);
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    CefRefPtr<CefStreamWriter> writer =
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        CefStreamWriter::CreateForHandler(handler.get());
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    drag_data->GetFileContents(writer);
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    DCHECK_EQ(handler->GetDataSize(), static_cast<int64>(bufferSize));
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    CefString fileName = drag_data->GetFileName();
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    GetStorageForFileDescriptor(&stgmeds[curr_index], fileName.ToWString());
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    fmtetc.cfFormat = file_desc_format;
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    fmtetcs[curr_index] = fmtetc;
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    curr_index++;
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    GetStorageForBytes(&stgmeds[curr_index], handler->GetData(),
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                       handler->GetDataSize());
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    fmtetc.cfFormat = file_contents_format;
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    fmtetcs[curr_index] = fmtetc;
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    curr_index++;
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  }
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  DCHECK_LT(curr_index, kMaxDataObjects);
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  CComPtr<DataObjectWin> obj =
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      DataObjectWin::Create(fmtetcs, stgmeds, curr_index);
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  (*data_object) = obj.Detach();
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  return true;
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}
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CefRefPtr<CefDragData> DataObjectToDragData(IDataObject* data_object) {
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  CefRefPtr<CefDragData> drag_data = CefDragData::Create();
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  IEnumFORMATETC* enumFormats = nullptr;
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  HRESULT res = data_object->EnumFormatEtc(DATADIR_GET, &enumFormats);
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  if (res != S_OK)
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    return drag_data;
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  enumFormats->Reset();
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  const int kCelt = 10;
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  ULONG celtFetched;
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  do {
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    celtFetched = kCelt;
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    FORMATETC rgelt[kCelt];
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    res = enumFormats->Next(kCelt, rgelt, &celtFetched);
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    for (unsigned i = 0; i < celtFetched; i++) {
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      CLIPFORMAT format = rgelt[i].cfFormat;
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      if (!(format == CF_UNICODETEXT || format == CF_TEXT ||
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            format == moz_url_format || format == html_format ||
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            format == CF_HDROP) ||
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          rgelt[i].tymed != TYMED_HGLOBAL)
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        continue;
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      STGMEDIUM medium;
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      if (data_object->GetData(&rgelt[i], &medium) == S_OK) {
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        if (!medium.hGlobal) {
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          ReleaseStgMedium(&medium);
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          continue;
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        }
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        void* hGlobal = GlobalLock(medium.hGlobal);
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        if (!hGlobal) {
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          ReleaseStgMedium(&medium);
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          continue;
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        }
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        if (format == CF_UNICODETEXT) {
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          CefString text;
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          text.FromWString((std::wstring::value_type*)hGlobal);
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          drag_data->SetFragmentText(text);
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        } else if (format == CF_TEXT) {
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          CefString text;
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          text.FromString((std::string::value_type*)hGlobal);
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          drag_data->SetFragmentText(text);
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        } else if (format == moz_url_format) {
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          std::wstring html((std::wstring::value_type*)hGlobal);
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          size_t pos = html.rfind('\n');
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          CefString url(html.substr(0, pos));
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          CefString title(html.substr(pos + 1));
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          drag_data->SetLinkURL(url);
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          drag_data->SetLinkTitle(title);
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        } else if (format == html_format) {
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          std::string cf_html((std::string::value_type*)hGlobal);
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          std::string base_url;
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          std::string html;
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          CFHtmlToHtml(cf_html, &html, &base_url);
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          drag_data->SetFragmentHtml(html);
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          drag_data->SetFragmentBaseURL(base_url);
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        }
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        if (format == CF_HDROP) {
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          HDROP hdrop = (HDROP)hGlobal;
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          const int kMaxFilenameLen = 4096;
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          const unsigned num_files = DragQueryFileW(hdrop, 0xffffffff, 0, 0);
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          for (unsigned int x = 0; x < num_files; ++x) {
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            wchar_t filename[kMaxFilenameLen];
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            if (!DragQueryFileW(hdrop, x, filename, kMaxFilenameLen))
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              continue;
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            WCHAR* name = wcsrchr(filename, '\\');
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            drag_data->AddFile(filename, (name ? name + 1 : filename));
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          }
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        }
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        if (medium.hGlobal)
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          GlobalUnlock(medium.hGlobal);
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        if (format == CF_HDROP)
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          DragFinish((HDROP)hGlobal);
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        else
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          ReleaseStgMedium(&medium);
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      }
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    }
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  } while (res == S_OK);
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  enumFormats->Release();
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  return drag_data;
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}
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}  // namespace
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CComPtr<DropTargetWin> DropTargetWin::Create(OsrDragEvents* callback,
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                                             HWND hWnd) {
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  return CComPtr<DropTargetWin>(new DropTargetWin(callback, hWnd));
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}
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HRESULT DropTargetWin::DragEnter(IDataObject* data_object,
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                                 DWORD key_state,
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                                 POINTL cursor_position,
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                                 DWORD* effect) {
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  if (!callback_)
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    return E_UNEXPECTED;
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  CefRefPtr<CefDragData> drag_data = current_drag_data_;
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  if (!drag_data) {
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    drag_data = DataObjectToDragData(data_object);
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  }
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  CefMouseEvent ev = ToMouseEvent(cursor_position, key_state, hWnd_);
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  CefBrowserHost::DragOperationsMask mask = DropEffectToDragOperation(*effect);
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  mask = callback_->OnDragEnter(drag_data, ev, mask);
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  *effect = DragOperationToDropEffect(mask);
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  return S_OK;
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}
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CefBrowserHost::DragOperationsMask DropTargetWin::StartDragging(
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    CefRefPtr<CefBrowser> browser,
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    CefRefPtr<CefDragData> drag_data,
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    CefRenderHandler::DragOperationsMask allowed_ops,
 | 
						|
    int x,
 | 
						|
    int y) {
 | 
						|
  CComPtr<IDataObject> dataObject;
 | 
						|
  DWORD resEffect = DROPEFFECT_NONE;
 | 
						|
  if (DragDataToDataObject(drag_data, &dataObject)) {
 | 
						|
    CComPtr<DropSourceWin> dropSource = DropSourceWin::Create();
 | 
						|
    DWORD effect = DragOperationToDropEffect(allowed_ops);
 | 
						|
    current_drag_data_ = drag_data->Clone();
 | 
						|
    current_drag_data_->ResetFileContents();
 | 
						|
    HRESULT res = DoDragDrop(dataObject, dropSource, effect, &resEffect);
 | 
						|
    if (res != DRAGDROP_S_DROP)
 | 
						|
      resEffect = DROPEFFECT_NONE;
 | 
						|
    current_drag_data_ = nullptr;
 | 
						|
  }
 | 
						|
  return DropEffectToDragOperation(resEffect);
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DropTargetWin::DragOver(DWORD key_state,
 | 
						|
                                POINTL cursor_position,
 | 
						|
                                DWORD* effect) {
 | 
						|
  if (!callback_)
 | 
						|
    return E_UNEXPECTED;
 | 
						|
  CefMouseEvent ev = ToMouseEvent(cursor_position, key_state, hWnd_);
 | 
						|
  CefBrowserHost::DragOperationsMask mask = DropEffectToDragOperation(*effect);
 | 
						|
  mask = callback_->OnDragOver(ev, mask);
 | 
						|
  *effect = DragOperationToDropEffect(mask);
 | 
						|
  return S_OK;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DropTargetWin::DragLeave() {
 | 
						|
  if (!callback_)
 | 
						|
    return E_UNEXPECTED;
 | 
						|
  callback_->OnDragLeave();
 | 
						|
  return S_OK;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DropTargetWin::Drop(IDataObject* data_object,
 | 
						|
                            DWORD key_state,
 | 
						|
                            POINTL cursor_position,
 | 
						|
                            DWORD* effect) {
 | 
						|
  if (!callback_)
 | 
						|
    return E_UNEXPECTED;
 | 
						|
  CefMouseEvent ev = ToMouseEvent(cursor_position, key_state, hWnd_);
 | 
						|
  CefBrowserHost::DragOperationsMask mask = DropEffectToDragOperation(*effect);
 | 
						|
  mask = callback_->OnDrop(ev, mask);
 | 
						|
  *effect = DragOperationToDropEffect(mask);
 | 
						|
  return S_OK;
 | 
						|
}
 | 
						|
 | 
						|
CComPtr<DropSourceWin> DropSourceWin::Create() {
 | 
						|
  return CComPtr<DropSourceWin>(new DropSourceWin());
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DropSourceWin::GiveFeedback(DWORD dwEffect) {
 | 
						|
  return DRAGDROP_S_USEDEFAULTCURSORS;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DropSourceWin::QueryContinueDrag(BOOL fEscapePressed,
 | 
						|
                                         DWORD grfKeyState) {
 | 
						|
  if (fEscapePressed) {
 | 
						|
    return DRAGDROP_S_CANCEL;
 | 
						|
  }
 | 
						|
 | 
						|
  if (!(grfKeyState & MK_LBUTTON)) {
 | 
						|
    return DRAGDROP_S_DROP;
 | 
						|
  }
 | 
						|
 | 
						|
  return S_OK;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DragEnumFormatEtc::CreateEnumFormatEtc(
 | 
						|
    UINT cfmt,
 | 
						|
    FORMATETC* afmt,
 | 
						|
    IEnumFORMATETC** ppEnumFormatEtc) {
 | 
						|
  if (cfmt == 0 || afmt == 0 || ppEnumFormatEtc == 0)
 | 
						|
    return E_INVALIDARG;
 | 
						|
 | 
						|
  *ppEnumFormatEtc = new DragEnumFormatEtc(afmt, cfmt);
 | 
						|
 | 
						|
  return (*ppEnumFormatEtc) ? S_OK : E_OUTOFMEMORY;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DragEnumFormatEtc::Next(ULONG celt,
 | 
						|
                                FORMATETC* pFormatEtc,
 | 
						|
                                ULONG* pceltFetched) {
 | 
						|
  ULONG copied = 0;
 | 
						|
 | 
						|
  // copy the FORMATETC structures into the caller's buffer
 | 
						|
  while (m_nIndex < m_nNumFormats && copied < celt) {
 | 
						|
    DeepCopyFormatEtc(&pFormatEtc[copied], &m_pFormatEtc[m_nIndex]);
 | 
						|
    copied++;
 | 
						|
    m_nIndex++;
 | 
						|
  }
 | 
						|
 | 
						|
  // store result
 | 
						|
  if (pceltFetched != 0)
 | 
						|
    *pceltFetched = copied;
 | 
						|
 | 
						|
  // did we copy all that was requested?
 | 
						|
  return (copied == celt) ? S_OK : S_FALSE;
 | 
						|
}
 | 
						|
HRESULT DragEnumFormatEtc::Skip(ULONG celt) {
 | 
						|
  m_nIndex += celt;
 | 
						|
  return (m_nIndex <= m_nNumFormats) ? S_OK : S_FALSE;
 | 
						|
}
 | 
						|
HRESULT DragEnumFormatEtc::Reset(void) {
 | 
						|
  m_nIndex = 0;
 | 
						|
  return S_OK;
 | 
						|
}
 | 
						|
HRESULT DragEnumFormatEtc::Clone(IEnumFORMATETC** ppEnumFormatEtc) {
 | 
						|
  HRESULT hResult;
 | 
						|
 | 
						|
  // make a duplicate enumerator
 | 
						|
  hResult = CreateEnumFormatEtc(m_nNumFormats, m_pFormatEtc, ppEnumFormatEtc);
 | 
						|
 | 
						|
  if (hResult == S_OK) {
 | 
						|
    // manually set the index state
 | 
						|
    reinterpret_cast<DragEnumFormatEtc*>(*ppEnumFormatEtc)->m_nIndex = m_nIndex;
 | 
						|
  }
 | 
						|
 | 
						|
  return hResult;
 | 
						|
}
 | 
						|
 | 
						|
DragEnumFormatEtc::DragEnumFormatEtc(FORMATETC* pFormatEtc, int nNumFormats) {
 | 
						|
  AddRef();
 | 
						|
 | 
						|
  m_nIndex = 0;
 | 
						|
  m_nNumFormats = nNumFormats;
 | 
						|
  m_pFormatEtc = new FORMATETC[nNumFormats];
 | 
						|
 | 
						|
  // make a new copy of each FORMATETC structure
 | 
						|
  for (int i = 0; i < nNumFormats; i++) {
 | 
						|
    DeepCopyFormatEtc(&m_pFormatEtc[i], &pFormatEtc[i]);
 | 
						|
  }
 | 
						|
}
 | 
						|
DragEnumFormatEtc::~DragEnumFormatEtc() {
 | 
						|
  // first free any DVTARGETDEVICE structures
 | 
						|
  for (ULONG i = 0; i < m_nNumFormats; i++) {
 | 
						|
    if (m_pFormatEtc[i].ptd)
 | 
						|
      CoTaskMemFree(m_pFormatEtc[i].ptd);
 | 
						|
  }
 | 
						|
 | 
						|
  // now free the main array
 | 
						|
  delete[] m_pFormatEtc;
 | 
						|
}
 | 
						|
 | 
						|
void DragEnumFormatEtc::DeepCopyFormatEtc(FORMATETC* dest, FORMATETC* source) {
 | 
						|
  // copy the source FORMATETC into dest
 | 
						|
  *dest = *source;
 | 
						|
  if (source->ptd) {
 | 
						|
    // allocate memory for the DVTARGETDEVICE if necessary
 | 
						|
    dest->ptd = reinterpret_cast<DVTARGETDEVICE*>(
 | 
						|
        CoTaskMemAlloc(sizeof(DVTARGETDEVICE)));
 | 
						|
 | 
						|
    // copy the contents of the source DVTARGETDEVICE into dest->ptd
 | 
						|
    *(dest->ptd) = *(source->ptd);
 | 
						|
  }
 | 
						|
}
 | 
						|
 | 
						|
CComPtr<DataObjectWin> DataObjectWin::Create(FORMATETC* fmtetc,
 | 
						|
                                             STGMEDIUM* stgmed,
 | 
						|
                                             int count) {
 | 
						|
  return CComPtr<DataObjectWin>(new DataObjectWin(fmtetc, stgmed, count));
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::GetDataHere(FORMATETC* pFormatEtc, STGMEDIUM* pmedium) {
 | 
						|
  return E_NOTIMPL;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::QueryGetData(FORMATETC* pFormatEtc) {
 | 
						|
  return (LookupFormatEtc(pFormatEtc) == -1) ? DV_E_FORMATETC : S_OK;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::GetCanonicalFormatEtc(FORMATETC* pFormatEct,
 | 
						|
                                             FORMATETC* pFormatEtcOut) {
 | 
						|
  pFormatEtcOut->ptd = NULL;
 | 
						|
  return E_NOTIMPL;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::SetData(FORMATETC* pFormatEtc,
 | 
						|
                               STGMEDIUM* pMedium,
 | 
						|
                               BOOL fRelease) {
 | 
						|
  return E_NOTIMPL;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::DAdvise(FORMATETC* pFormatEtc,
 | 
						|
                               DWORD advf,
 | 
						|
                               IAdviseSink*,
 | 
						|
                               DWORD*) {
 | 
						|
  return E_NOTIMPL;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::DUnadvise(DWORD dwConnection) {
 | 
						|
  return E_NOTIMPL;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::EnumDAdvise(IEnumSTATDATA** ppEnumAdvise) {
 | 
						|
  return E_NOTIMPL;
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::EnumFormatEtc(DWORD dwDirection,
 | 
						|
                                     IEnumFORMATETC** ppEnumFormatEtc) {
 | 
						|
  return DragEnumFormatEtc::CreateEnumFormatEtc(m_nNumFormats, m_pFormatEtc,
 | 
						|
                                                ppEnumFormatEtc);
 | 
						|
}
 | 
						|
 | 
						|
HRESULT DataObjectWin::GetData(FORMATETC* pFormatEtc, STGMEDIUM* pMedium) {
 | 
						|
  int idx;
 | 
						|
 | 
						|
  // try to match the specified FORMATETC with one of our supported formats
 | 
						|
  if ((idx = LookupFormatEtc(pFormatEtc)) == -1)
 | 
						|
    return DV_E_FORMATETC;
 | 
						|
 | 
						|
  // found a match - transfer data into supplied storage medium
 | 
						|
  pMedium->tymed = m_pFormatEtc[idx].tymed;
 | 
						|
  pMedium->pUnkForRelease = 0;
 | 
						|
 | 
						|
  // copy the data into the caller's storage medium
 | 
						|
  switch (m_pFormatEtc[idx].tymed) {
 | 
						|
    case TYMED_HGLOBAL:
 | 
						|
      pMedium->hGlobal = DupGlobalMem(m_pStgMedium[idx].hGlobal);
 | 
						|
      break;
 | 
						|
 | 
						|
    default:
 | 
						|
      return DV_E_FORMATETC;
 | 
						|
  }
 | 
						|
  return S_OK;
 | 
						|
}
 | 
						|
 | 
						|
HGLOBAL DataObjectWin::DupGlobalMem(HGLOBAL hMem) {
 | 
						|
  DWORD len = GlobalSize(hMem);
 | 
						|
  PVOID source = GlobalLock(hMem);
 | 
						|
  PVOID dest = GlobalAlloc(GMEM_FIXED, len);
 | 
						|
 | 
						|
  memcpy(dest, source, len);
 | 
						|
  GlobalUnlock(hMem);
 | 
						|
  return dest;
 | 
						|
}
 | 
						|
 | 
						|
int DataObjectWin::LookupFormatEtc(FORMATETC* pFormatEtc) {
 | 
						|
  // check each of our formats in turn to see if one matches
 | 
						|
  for (int i = 0; i < m_nNumFormats; i++) {
 | 
						|
    if ((m_pFormatEtc[i].tymed & pFormatEtc->tymed) &&
 | 
						|
        m_pFormatEtc[i].cfFormat == pFormatEtc->cfFormat &&
 | 
						|
        m_pFormatEtc[i].dwAspect == pFormatEtc->dwAspect) {
 | 
						|
      // return index of stored format
 | 
						|
      return i;
 | 
						|
    }
 | 
						|
  }
 | 
						|
 | 
						|
  // error, format not found
 | 
						|
  return -1;
 | 
						|
}
 | 
						|
 | 
						|
DataObjectWin::DataObjectWin(FORMATETC* fmtetc, STGMEDIUM* stgmed, int count)
 | 
						|
    : ref_count_(0) {
 | 
						|
  m_nNumFormats = count;
 | 
						|
 | 
						|
  m_pFormatEtc = new FORMATETC[count];
 | 
						|
  m_pStgMedium = new STGMEDIUM[count];
 | 
						|
 | 
						|
  for (int i = 0; i < count; i++) {
 | 
						|
    m_pFormatEtc[i] = fmtetc[i];
 | 
						|
    m_pStgMedium[i] = stgmed[i];
 | 
						|
  }
 | 
						|
}
 | 
						|
 | 
						|
}  // namespace client
 | 
						|
 | 
						|
#endif  // defined(CEF_USE_ATL)
 |