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// Copyright (c) 2008-2009 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This file contains the implementation of BrowserWebViewDelegate, which serves
// as the WebViewDelegate for the BrowserWebHost. The host is expected to
// have initialized a MessageLoop before these methods are called.
#include "browser_webview_delegate.h"
#include "browser_navigation_controller.h"
#include "browser_impl.h"
#include "cef_context.h"
#include <objidl.h>
#include <shlobj.h>
#include <shlwapi.h>
#include "base/message_loop.h"
#include "base/string_util.h"
#include "net/base/net_errors.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebContextMenuData.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCursorInfo.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebRect.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "ui/gfx/gdi_util.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/point.h"
#include "webkit/glue/webdropdata.h"
#include "webkit/glue/webpreferences.h"
#include "webkit/glue/webkit_glue.h"
#include "webkit/glue/window_open_disposition.h"
#include "webkit/plugins/npapi/plugin_list.h"
#include "webkit/plugins/npapi/webplugin.h"
#include "webkit/plugins/npapi/webplugin_delegate_impl.h"
using webkit::npapi::WebPluginDelegateImpl;
using WebKit::WebContextMenuData;
using WebKit::WebCursorInfo;
using WebKit::WebExternalPopupMenu;
using WebKit::WebExternalPopupMenuClient;
using WebKit::WebFrame;
using WebKit::WebNavigationPolicy;
using WebKit::WebPopupMenuInfo;
using WebKit::WebRect;
using WebKit::WebWidget;
static const wchar_t kPluginWindowClassName[] = L"WebPluginHost";
// WebViewClient --------------------------------------------------------------
WebExternalPopupMenu* BrowserWebViewDelegate::createExternalPopupMenu(
const WebPopupMenuInfo& info,
WebExternalPopupMenuClient* client) {
NOTREACHED();
return NULL;
}
// WebWidgetClient ------------------------------------------------------------
void BrowserWebViewDelegate::show(WebNavigationPolicy) {
if (this == browser_->UIT_GetWebViewDelegate()) {
if (!browser_->IsWindowRenderingDisabled()) {
// Restore the window and bring it to the top if the window is currently
// visible.
HWND root = GetAncestor(browser_->UIT_GetMainWndHandle(), GA_ROOT);
if(IsWindowVisible(root)) {
ShowWindow(root, SW_SHOWNORMAL);
SetWindowPos(root, HWND_TOP, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
}
}
} else if (this == browser_->UIT_GetPopupDelegate()) {
if (!browser_->IsWindowRenderingDisabled()) {
// Show popup widgets without activation.
ShowWindow(browser_->UIT_GetPopupWndHandle(), SW_SHOWNA);
} else {
// Notify the handler of popup visibility change.
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefRenderHandler> handler = client->GetRenderHandler();
if (handler.get())
handler->OnPopupShow(browser_, true);
}
}
}
}
void BrowserWebViewDelegate::didChangeCursor(const WebCursorInfo& cursor_info) {
if (WebWidgetHost* host = GetWidgetHost()) {
current_cursor_.InitFromCursorInfo(cursor_info);
HMODULE hModule = ::GetModuleHandle(L"libcef.dll");
if(!hModule)
hModule = ::GetModuleHandle(NULL);
HCURSOR hCursor = current_cursor_.GetCursor(hModule);
if (!browser_->IsWindowRenderingDisabled()) {
host->SetCursor(hCursor);
} else {
// Notify the handler of cursor change.
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefRenderHandler> handler = client->GetRenderHandler();
if (handler.get())
handler->OnCursorChange(browser_, hCursor);
}
}
}
}
WebRect BrowserWebViewDelegate::windowRect() {
if (WebWidgetHost* host = GetWidgetHost()) {
if (!browser_->IsWindowRenderingDisabled()) {
RECT rect;
::GetWindowRect(host->view_handle(), &rect);
return gfx::Rect(rect);
} else {
// Retrieve the view rectangle from the handler.
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefRenderHandler> handler = client->GetRenderHandler();
if (handler.get()) {
CefRect rect(0, 0, 0, 0);
if (handler->GetViewRect(browser_, rect))
return WebRect(rect.x, rect.y, rect.width, rect.height);
}
}
}
}
return WebRect();
}
void BrowserWebViewDelegate::setWindowRect(const WebRect& rect) {
if (this == browser_->UIT_GetWebViewDelegate()) {
// ignored
} else if (this == browser_->UIT_GetPopupDelegate()) {
if (!browser_->IsWindowRenderingDisabled()) {
MoveWindow(browser_->UIT_GetPopupWndHandle(), rect.x, rect.y, rect.width,
rect.height, FALSE);
} else {
browser_->set_popup_rect(rect);
browser_->UIT_GetPopupHost()->SetSize(rect.width, rect.height);
// Notify the handler of popup size change.
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefRenderHandler> handler = client->GetRenderHandler();
if (handler.get()) {
handler->OnPopupSize(browser_,
CefRect(rect.x, rect.y, rect.width, rect.height));
}
}
}
}
}
WebRect BrowserWebViewDelegate::rootWindowRect() {
if (WebWidgetHost* host = GetWidgetHost()) {
RECT rect;
HWND root_window = ::GetAncestor(host->view_handle(), GA_ROOT);
::GetWindowRect(root_window, &rect);
return gfx::Rect(rect);
}
return WebRect();
}
WebRect BrowserWebViewDelegate::windowResizerRect() {
// Not necessary on Windows.
return WebRect();
}
void BrowserWebViewDelegate::runModal() {
WebWidgetHost* host = GetWidgetHost();
if (!host)
return;
show(WebKit::WebNavigationPolicyNewWindow);
browser_->UIT_SetIsModal(true);
CefRefPtr<CefClient> client = browser_->GetClient();
CefRefPtr<CefLifeSpanHandler> handler;
if( client.get())
handler = client->GetLifeSpanHandler();
bool handled(false);
if (handler.get()) {
// Let the client override the modal message loop.
handled = handler->RunModal(browser_);
}
if (!handled) {
HWND child = ::GetAncestor(browser_->UIT_GetMainWndHandle(), GA_ROOT);
HWND owner = ::GetAncestor(browser_->opener_window(), GA_ROOT);
if (child && owner) {
// Set the owner so that Windows keeps this window above the owner.
::SetWindowLong(child, GWL_HWNDPARENT, (LONG)owner);
// Disable the owner if it is enabled so that you can't interact with it.
// while this child window is open.
if (::IsWindowEnabled(owner)) {
::EnableWindow(owner, FALSE);
browser_->set_opener_was_disabled_by_modal_loop(true);
}
DWORD dwStyle = ::GetWindowLong(child, GWL_STYLE);
DWORD dwNewStyle = dwStyle | WS_POPUP;
if(dwStyle != dwNewStyle)
::SetWindowLong(child, GWL_STYLE, dwNewStyle);
}
// Tell the browser to exit this message loop when this window closes.
browser_->set_internal_modal_message_loop_is_active(true);
// Start a new message loop here and return when this window closes.
MessageLoop* message_loop = MessageLoop::current();
bool old_state = message_loop->NestableTasksAllowed();
message_loop->SetNestableTasksAllowed(true);
message_loop->Run();
message_loop->SetNestableTasksAllowed(old_state);
}
}
// WebPluginPageDelegate ------------------------------------------------------
webkit::npapi::WebPluginDelegate* BrowserWebViewDelegate::CreatePluginDelegate(
const FilePath& file_path,
const std::string& mime_type)
{
WebViewHost* host = browser_->UIT_GetWebViewHost();
if (!host)
return NULL;
HWND hwnd;
if (!browser_->IsWindowRenderingDisabled()) {
// Parent the plugin container to the existing browser window.
hwnd = browser_->UIT_GetWebViewHost()->view_handle();
DCHECK(hwnd != NULL);
} else {
// Parent the plugin container to the main window handle provided by the
// user.
hwnd = browser_->UIT_GetMainWndHandle();
DCHECK(hwnd != NULL);
}
return WebPluginDelegateImpl::Create(file_path, mime_type, hwnd);
}
void BrowserWebViewDelegate::CreatedPluginWindow(
gfx::PluginWindowHandle handle) {
if (browser_->IsWindowRenderingDisabled()) {
static bool registered_class = false;
if (!registered_class) {
WNDCLASSEX wcex = {0};
wcex.cbSize = sizeof(wcex);
wcex.style = CS_DBLCLKS;
wcex.lpfnWndProc = DefWindowProc;
wcex.hInstance = GetModuleHandle(NULL);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.lpszClassName = kPluginWindowClassName;
RegisterClassEx(&wcex);
registered_class = true;
}
// Parent windowed plugin containers to a hidden window.
HWND parent = CreateWindow(kPluginWindowClassName, NULL,
WS_OVERLAPPED|WS_CLIPCHILDREN|WS_CLIPSIBLINGS,
0, 0, 0, 0, NULL, NULL,
GetModuleHandle(NULL), NULL);
DCHECK(parent != NULL);
SetParent(handle, parent);
WebViewHost* host = browser_->UIT_GetWebViewHost();
if (host)
host->AddWindowedPlugin(handle);
}
}
void BrowserWebViewDelegate::WillDestroyPluginWindow(
gfx::PluginWindowHandle handle) {
if (browser_->IsWindowRenderingDisabled()) {
WebViewHost* host = browser_->UIT_GetWebViewHost();
if (host)
host->RemoveWindowedPlugin(handle);
// Destroy the hidden parent window.
DestroyWindow(GetParent(handle));
}
}
void BrowserWebViewDelegate::DidMovePlugin(
const webkit::npapi::WebPluginGeometry& move) {
unsigned long flags = 0;
if (move.rects_valid) {
HRGN hrgn = ::CreateRectRgn(move.clip_rect.x(),
move.clip_rect.y(),
move.clip_rect.right(),
move.clip_rect.bottom());
gfx::SubtractRectanglesFromRegion(hrgn, move.cutout_rects);
// Note: System will own the hrgn after we call SetWindowRgn,
// so we don't need to call DeleteObject(hrgn)
::SetWindowRgn(move.window, hrgn, FALSE);
} else {
flags |= (SWP_NOSIZE | SWP_NOMOVE);
}
if (move.visible)
flags |= SWP_SHOWWINDOW;
else
flags |= SWP_HIDEWINDOW;
::SetWindowPos(move.window,
NULL,
move.window_rect.x(),
move.window_rect.y(),
move.window_rect.width(),
move.window_rect.height(),
flags);
if (browser_->IsWindowRenderingDisabled()) {
WebViewHost* host = browser_->UIT_GetWebViewHost();
if (host) {
host->MoveWindowedPlugin(move);
}
}
}
static void AddMenuItem(CefRefPtr<CefBrowser> browser, HMENU menu, int index,
cef_handler_menuid_t id, const wchar_t* label,
bool enabled, std::list<std::wstring>& label_list)
{
CefString actual_label(label);
CefRefPtr<CefClient> client = browser->GetClient();
if (client.get()) {
CefRefPtr<CefMenuHandler> handler = client->GetMenuHandler();
if(handler.get()) {
// Let the handler change the label if desired
handler->GetMenuLabel(browser, id, actual_label);
}
}
// store the label in a list to simplify memory management
label_list.push_back(actual_label);
MENUITEMINFO mii;
mii.cbSize = sizeof(mii);
mii.fMask = MIIM_FTYPE | MIIM_ID | MIIM_STRING;
mii.fType = MFT_STRING;
if(!enabled) {
mii.fMask |= MIIM_STATE;
mii.fState = MFS_GRAYED;
}
mii.wID = id;
mii.dwTypeData = const_cast<wchar_t*>(label_list.back().c_str());
InsertMenuItem(menu, index, TRUE, &mii);
}
static void AddMenuSeparator(HMENU menu, int index)
{
MENUITEMINFO mii;
mii.cbSize = sizeof(mii);
mii.fMask = MIIM_FTYPE;
mii.fType = MFT_SEPARATOR;
InsertMenuItem(menu, index, TRUE, &mii);
}
void BrowserWebViewDelegate::showContextMenu(
WebFrame* frame, const WebContextMenuData& data)
{
int screenX = -1, screenY = -1;
POINT mouse_pt = {data.mousePosition.x, data.mousePosition.y};
if (!browser_->IsWindowRenderingDisabled()) {
// Perform the conversion to screen coordinates only if window rendering is
// enabled.
MapWindowPoints(browser_->UIT_GetMainWndHandle(), HWND_DESKTOP,
&mouse_pt, 1);
screenX = mouse_pt.x;
screenY = mouse_pt.y;
}
HMENU menu = NULL;
std::list<std::wstring> label_list;
// Enable recursive tasks on the message loop so we can get updates while
// the context menu is being displayed.
bool old_state = MessageLoop::current()->NestableTasksAllowed();
MessageLoop::current()->SetNestableTasksAllowed(true);
int edit_flags = data.editFlags;
if(browser_->UIT_CanGoBack())
edit_flags |= MENU_CAN_GO_BACK;
if(browser_->UIT_CanGoForward())
edit_flags |= MENU_CAN_GO_FORWARD;
int type_flags = MENUTYPE_NONE;
if(!data.pageURL.isEmpty())
type_flags |= MENUTYPE_PAGE;
if(!data.frameURL.isEmpty())
type_flags |= MENUTYPE_FRAME;
if(!data.linkURL.isEmpty())
type_flags |= MENUTYPE_LINK;
if(data.mediaType == WebContextMenuData::MediaTypeImage)
type_flags |= MENUTYPE_IMAGE;
if(!data.selectedText.isEmpty())
type_flags |= MENUTYPE_SELECTION;
if(data.isEditable)
type_flags |= MENUTYPE_EDITABLE;
if(data.isSpellCheckingEnabled && !data.misspelledWord.isEmpty())
type_flags |= MENUTYPE_MISSPELLED_WORD;
if(data.mediaType == WebContextMenuData::MediaTypeVideo)
type_flags |= MENUTYPE_VIDEO;
if(data.mediaType == WebContextMenuData::MediaTypeAudio)
type_flags |= MENUTYPE_AUDIO;
CefRefPtr<CefClient> client = browser_->GetClient();
CefRefPtr<CefMenuHandler> handler;
if (client.get())
handler = client->GetMenuHandler();
if (handler.get()) {
// Gather menu information
cef_handler_menuinfo_t menuInfo;
memset(&menuInfo, 0, sizeof(menuInfo));
CefString linkStr(std::string(data.linkURL.spec()));
CefString imageStr(std::string(data.srcURL.spec()));
CefString pageStr(std::string(data.pageURL.spec()));
CefString frameStr(std::string(data.frameURL.spec()));
CefString selectedTextStr(string16(data.selectedText));
CefString misspelledWordStr(string16(data.misspelledWord));
CefString securityInfoStr(std::string(data.securityInfo));
menuInfo.typeFlags = type_flags;
menuInfo.x = mouse_pt.x;
menuInfo.y = mouse_pt.y;
cef_string_set(linkStr.c_str(), linkStr.length(), &menuInfo.linkUrl, false);
cef_string_set(imageStr.c_str(), imageStr.length(), &menuInfo.imageUrl,
false);
cef_string_set(pageStr.c_str(), pageStr.length(), &menuInfo.pageUrl, false);
cef_string_set(frameStr.c_str(), frameStr.length(), &menuInfo.frameUrl,
false);
cef_string_set(selectedTextStr.c_str(), selectedTextStr.length(),
&menuInfo.selectionText, false);
cef_string_set(misspelledWordStr.c_str(), misspelledWordStr.length(),
&menuInfo.misspelledWord, false);
menuInfo.editFlags = edit_flags;
cef_string_set(securityInfoStr.c_str(), securityInfoStr.length(),
&menuInfo.securityInfo, false);
// Notify the handler that a context menu is requested
if (handler->OnBeforeMenu(browser_, menuInfo))
goto end;
}
if (client.get() && browser_->IsWindowRenderingDisabled()) {
CefRefPtr<CefRenderHandler> render_handler = client->GetRenderHandler();
if (render_handler.get() &&
!render_handler->GetScreenPoint(browser_, mouse_pt.x, mouse_pt.y,
screenX, screenY)) {
goto end;
}
}
// Build the correct default context menu
if (type_flags & MENUTYPE_EDITABLE) {
menu = CreatePopupMenu();
AddMenuItem(browser_, menu, -1, MENU_ID_UNDO, L"Undo",
!!(edit_flags & MENU_CAN_UNDO), label_list);
AddMenuItem(browser_, menu, -1, MENU_ID_REDO, L"Redo",
!!(edit_flags & MENU_CAN_REDO), label_list);
AddMenuSeparator(menu, -1);
AddMenuItem(browser_, menu, -1, MENU_ID_CUT, L"Cut",
!!(edit_flags & MENU_CAN_CUT), label_list);
AddMenuItem(browser_, menu, -1, MENU_ID_COPY, L"Copy",
!!(edit_flags & MENU_CAN_COPY), label_list);
AddMenuItem(browser_, menu, -1, MENU_ID_PASTE, L"Paste",
!!(edit_flags & MENU_CAN_PASTE), label_list);
AddMenuItem(browser_, menu, -1, MENU_ID_DELETE, L"Delete",
!!(edit_flags & MENU_CAN_DELETE), label_list);
AddMenuSeparator(menu, -1);
AddMenuItem(browser_, menu, -1, MENU_ID_SELECTALL, L"Select All",
!!(edit_flags & MENU_CAN_SELECT_ALL), label_list);
} else if(type_flags & MENUTYPE_SELECTION) {
menu = CreatePopupMenu();
AddMenuItem(browser_, menu, -1, MENU_ID_COPY, L"Copy",
!!(edit_flags & MENU_CAN_COPY), label_list);
} else if(type_flags & (MENUTYPE_PAGE | MENUTYPE_FRAME)) {
menu = CreatePopupMenu();
AddMenuItem(browser_, menu, -1, MENU_ID_NAV_BACK, L"Back",
!!(edit_flags & MENU_CAN_GO_BACK), label_list);
AddMenuItem(browser_, menu, -1, MENU_ID_NAV_FORWARD, L"Forward",
!!(edit_flags & MENU_CAN_GO_FORWARD), label_list);
AddMenuSeparator(menu, -1);
AddMenuItem(browser_, menu, -1, MENU_ID_PRINT, L"Print",
true, label_list);
AddMenuItem(browser_, menu, -1, MENU_ID_VIEWSOURCE, L"View Source",
true, label_list);
}
if (menu) {
// show the context menu
int selected_id = TrackPopupMenu(menu,
TPM_LEFTALIGN | TPM_RIGHTBUTTON | TPM_RETURNCMD | TPM_RECURSE,
screenX, screenY, 0, browser_->UIT_GetMainWndHandle(), NULL);
if (selected_id != 0) {
// An action was chosen
cef_handler_menuid_t menuId =
static_cast<cef_handler_menuid_t>(selected_id);
bool handled = false;
if (handler.get()) {
// Ask the handler if it wants to handle the action
handled = handler->OnMenuAction(browser_, menuId);
}
if(!handled) {
// Execute the action
browser_->UIT_HandleAction(menuId, browser_->GetFocusedFrame());
}
}
}
DestroyMenu(menu);
end:
MessageLoop::current()->SetNestableTasksAllowed(old_state);
}
// Private methods ------------------------------------------------------------
void BrowserWebViewDelegate::ShowJavaScriptAlert(WebFrame* webframe,
const CefString& message)
{
// TODO(cef): Think about what we should be showing as the prompt caption
std::wstring messageStr = message;
std::wstring titleStr = browser_->UIT_GetTitle();
MessageBox(browser_->UIT_GetMainWndHandle(), messageStr.c_str(),
titleStr.c_str(), MB_OK | MB_ICONWARNING);
}
bool BrowserWebViewDelegate::ShowJavaScriptConfirm(WebFrame* webframe,
const CefString& message)
{
// TODO(cef): Think about what we should be showing as the prompt caption
std::wstring messageStr = message;
std::wstring titleStr = browser_->UIT_GetTitle();
int rv = MessageBox(browser_->UIT_GetMainWndHandle(), messageStr.c_str(),
titleStr.c_str(), MB_YESNO | MB_ICONQUESTION);
return (rv == IDYES);
}
bool BrowserWebViewDelegate::ShowJavaScriptPrompt(WebFrame* webframe,
const CefString& message,
const CefString& default_value,
CefString* result)
{
// TODO(cef): Implement a default prompt dialog
return false;
}
namespace
{
// from chrome/browser/views/shell_dialogs_win.cc
bool RunOpenFileDialog(const std::wstring& filter, HWND owner, FilePath* path)
{
OPENFILENAME ofn;
// We must do this otherwise the ofn's FlagsEx may be initialized to random
// junk in release builds which can cause the Places Bar not to show up!
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = owner;
wchar_t filename[MAX_PATH];
base::wcslcpy(filename, path->value().c_str(), arraysize(filename));
ofn.lpstrFile = filename;
ofn.nMaxFile = MAX_PATH;
// We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
// without having to close Chrome first.
ofn.Flags = OFN_FILEMUSTEXIST | OFN_NOCHANGEDIR;
if (!filter.empty()) {
ofn.lpstrFilter = filter.c_str();
}
bool success = !!GetOpenFileName(&ofn);
if (success)
*path = FilePath(filename);
return success;
}
bool RunOpenMultiFileDialog(const std::wstring& filter, HWND owner,
std::vector<FilePath>* paths)
{
OPENFILENAME ofn;
// We must do this otherwise the ofn's FlagsEx may be initialized to random
// junk in release builds which can cause the Places Bar not to show up!
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = owner;
wchar_t filename[MAX_PATH] = L"";
ofn.lpstrFile = filename;
ofn.nMaxFile = MAX_PATH;
// We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
// without having to close Chrome first.
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_EXPLORER
| OFN_HIDEREADONLY | OFN_ALLOWMULTISELECT;
if (!filter.empty()) {
ofn.lpstrFilter = filter.c_str();
}
bool success = !!GetOpenFileName(&ofn);
if (success) {
std::vector<FilePath> files;
const wchar_t* selection = ofn.lpstrFile;
while (*selection) { // Empty string indicates end of list.
files.push_back(FilePath(selection));
// Skip over filename and null-terminator.
selection += files.back().value().length() + 1;
}
if (files.empty()) {
success = false;
} else if (files.size() == 1) {
// When there is one file, it contains the path and filename.
paths->swap(files);
} else {
// Otherwise, the first string is the path, and the remainder are
// filenames.
std::vector<FilePath>::iterator path = files.begin();
for (std::vector<FilePath>::iterator file = path + 1;
file != files.end(); ++file) {
paths->push_back(path->Append(*file));
}
}
}
return success;
}
}
bool BrowserWebViewDelegate::ShowFileChooser(std::vector<FilePath>& file_names,
const bool multi_select,
const WebKit::WebString& title,
const FilePath& default_file)
{
bool result = false;
if (multi_select) {
result = RunOpenMultiFileDialog(L"", browser_->UIT_GetMainWndHandle(),
&file_names);
} else {
FilePath file_name;
result = RunOpenFileDialog(L"", browser_->UIT_GetMainWndHandle(),
&file_name);
if (result)
file_names.push_back(file_name);
}
return result;
}
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