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gecko-dev/widget/windows/nsFilePicker.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsFilePicker.h"
#include <shlobj.h>
#include <shlwapi.h>
#include <cderr.h>
#include "mozilla/UniquePtr.h"
#include "mozilla/WindowsVersion.h"
#include "nsReadableUtils.h"
#include "nsNetUtil.h"
#include "nsWindow.h"
#include "nsILoadContext.h"
#include "nsIServiceManager.h"
#include "nsIURL.h"
#include "nsIStringBundle.h"
#include "nsEnumeratorUtils.h"
#include "nsCRT.h"
#include "nsString.h"
#include "nsToolkit.h"
#include "WinUtils.h"
#include "nsPIDOMWindow.h"
#include "GeckoProfiler.h"
using mozilla::IsVistaOrLater;
using mozilla::MakeUnique;
using mozilla::UniquePtr;
using namespace mozilla::widget;
char16_t *nsFilePicker::mLastUsedUnicodeDirectory;
char nsFilePicker::mLastUsedDirectory[MAX_PATH+1] = { 0 };
static const wchar_t kDialogPtrProp[] = L"DialogPtrProperty";
static const DWORD kDialogTimerID = 9999;
static const unsigned long kDialogTimerTimeout = 300;
#define MAX_EXTENSION_LENGTH 10
#define FILE_BUFFER_SIZE 4096
typedef DWORD FILEOPENDIALOGOPTIONS;
///////////////////////////////////////////////////////////////////////////////
// Helper classes
// Manages matching SuppressBlurEvents calls on the parent widget.
class AutoSuppressEvents
{
public:
explicit AutoSuppressEvents(nsIWidget* aWidget) :
mWindow(static_cast<nsWindow *>(aWidget)) {
SuppressWidgetEvents(true);
}
~AutoSuppressEvents() {
SuppressWidgetEvents(false);
}
private:
void SuppressWidgetEvents(bool aFlag) {
if (mWindow) {
mWindow->SuppressBlurEvents(aFlag);
}
}
RefPtr<nsWindow> mWindow;
};
// Manages the current working path.
class AutoRestoreWorkingPath
{
public:
AutoRestoreWorkingPath() {
DWORD bufferLength = GetCurrentDirectoryW(0, nullptr);
mWorkingPath = MakeUnique<wchar_t[]>(bufferLength);
if (GetCurrentDirectoryW(bufferLength, mWorkingPath.get()) == 0) {
mWorkingPath = nullptr;
}
}
~AutoRestoreWorkingPath() {
if (HasWorkingPath()) {
::SetCurrentDirectoryW(mWorkingPath.get());
}
}
inline bool HasWorkingPath() const {
return mWorkingPath != nullptr;
}
private:
UniquePtr<wchar_t[]> mWorkingPath;
};
// Manages NS_NATIVE_TMP_WINDOW child windows. NS_NATIVE_TMP_WINDOWs are
// temporary child windows of mParentWidget created to address RTL issues
// in picker dialogs. We are responsible for destroying these.
class AutoDestroyTmpWindow
{
public:
explicit AutoDestroyTmpWindow(HWND aTmpWnd) :
mWnd(aTmpWnd) {
}
~AutoDestroyTmpWindow() {
if (mWnd)
DestroyWindow(mWnd);
}
inline HWND get() const { return mWnd; }
private:
HWND mWnd;
};
// Manages matching PickerOpen/PickerClosed calls on the parent widget.
class AutoWidgetPickerState
{
public:
explicit AutoWidgetPickerState(nsIWidget* aWidget) :
mWindow(static_cast<nsWindow *>(aWidget)) {
PickerState(true);
}
~AutoWidgetPickerState() {
PickerState(false);
}
private:
void PickerState(bool aFlag) {
if (mWindow) {
if (aFlag)
mWindow->PickerOpen();
else
mWindow->PickerClosed();
}
}
RefPtr<nsWindow> mWindow;
};
// Manages a simple callback timer
class AutoTimerCallbackCancel
{
public:
AutoTimerCallbackCancel(nsFilePicker* aTarget,
nsTimerCallbackFunc aCallbackFunc) {
Init(aTarget, aCallbackFunc);
}
~AutoTimerCallbackCancel() {
if (mPickerCallbackTimer) {
mPickerCallbackTimer->Cancel();
}
}
private:
void Init(nsFilePicker* aTarget,
nsTimerCallbackFunc aCallbackFunc) {
mPickerCallbackTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mPickerCallbackTimer) {
NS_WARNING("do_CreateInstance for timer failed??");
return;
}
mPickerCallbackTimer->InitWithFuncCallback(aCallbackFunc,
aTarget,
kDialogTimerTimeout,
nsITimer::TYPE_REPEATING_SLACK);
}
nsCOMPtr<nsITimer> mPickerCallbackTimer;
};
///////////////////////////////////////////////////////////////////////////////
// nsIFilePicker
nsFilePicker::nsFilePicker() :
mSelectedType(1)
, mDlgWnd(nullptr)
, mFDECookie(0)
{
CoInitialize(nullptr);
}
nsFilePicker::~nsFilePicker()
{
if (mLastUsedUnicodeDirectory) {
free(mLastUsedUnicodeDirectory);
mLastUsedUnicodeDirectory = nullptr;
}
CoUninitialize();
}
NS_IMPL_ISUPPORTS(nsFilePicker, nsIFilePicker)
NS_IMETHODIMP nsFilePicker::Init(mozIDOMWindowProxy *aParent, const nsAString& aTitle, int16_t aMode)
{
nsCOMPtr<nsPIDOMWindowOuter> window = do_QueryInterface(aParent);
nsIDocShell* docShell = window ? window->GetDocShell() : nullptr;
mLoadContext = do_QueryInterface(docShell);
return nsBaseFilePicker::Init(aParent, aTitle, aMode);
}
STDMETHODIMP nsFilePicker::QueryInterface(REFIID refiid, void** ppvResult)
{
*ppvResult = nullptr;
if (IID_IUnknown == refiid ||
refiid == IID_IFileDialogEvents) {
*ppvResult = this;
}
if (nullptr != *ppvResult) {
((LPUNKNOWN)*ppvResult)->AddRef();
return S_OK;
}
return E_NOINTERFACE;
}
/*
* XP picker callbacks
*/
// Show - Display the file dialog
int CALLBACK
BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
if (uMsg == BFFM_INITIALIZED)
{
char16_t * filePath = (char16_t *) lpData;
if (filePath)
::SendMessageW(hwnd, BFFM_SETSELECTIONW,
TRUE /* true because lpData is a path string */,
lpData);
}
return 0;
}
static void
EnsureWindowVisible(HWND hwnd)
{
// Obtain the monitor which has the largest area of intersection
// with the window, or nullptr if there is no intersection.
HMONITOR monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONULL);
if (!monitor) {
// The window is not visible, we should reposition it to the same place as its parent
HWND parentHwnd = GetParent(hwnd);
RECT parentRect;
GetWindowRect(parentHwnd, &parentRect);
SetWindowPos(hwnd, nullptr, parentRect.left, parentRect.top, 0, 0,
SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOZORDER);
}
}
// Callback hook which will ensure that the window is visible. Currently
// only in use on os <= XP.
UINT_PTR CALLBACK
nsFilePicker::FilePickerHook(HWND hwnd,
UINT msg,
WPARAM wParam,
LPARAM lParam)
{
switch(msg) {
case WM_NOTIFY:
{
LPOFNOTIFYW lpofn = (LPOFNOTIFYW) lParam;
if (!lpofn || !lpofn->lpOFN) {
return 0;
}
if (CDN_INITDONE == lpofn->hdr.code) {
// The Window will be automatically moved to the last position after
// CDN_INITDONE. We post a message to ensure the window will be visible
// so it will be done after the automatic last position window move.
PostMessage(hwnd, MOZ_WM_ENSUREVISIBLE, 0, 0);
}
}
break;
case MOZ_WM_ENSUREVISIBLE:
EnsureWindowVisible(GetParent(hwnd));
break;
case WM_INITDIALOG:
{
OPENFILENAMEW* pofn = reinterpret_cast<OPENFILENAMEW*>(lParam);
SetProp(hwnd, kDialogPtrProp, (HANDLE)pofn->lCustData);
nsFilePicker* picker = reinterpret_cast<nsFilePicker*>(pofn->lCustData);
if (picker) {
picker->SetDialogHandle(hwnd);
SetTimer(hwnd, kDialogTimerID, kDialogTimerTimeout, nullptr);
}
}
break;
case WM_TIMER:
{
// Check to see if our parent has been torn down, if so, we close too.
if (wParam == kDialogTimerID) {
nsFilePicker* picker =
reinterpret_cast<nsFilePicker*>(GetProp(hwnd, kDialogPtrProp));
if (picker && picker->ClosePickerIfNeeded(true)) {
KillTimer(hwnd, kDialogTimerID);
}
}
}
break;
}
return 0;
}
// Callback hook which will dynamically allocate a buffer large enough
// for the file picker dialog. Currently only in use on os <= XP.
UINT_PTR CALLBACK
nsFilePicker::MultiFilePickerHook(HWND hwnd,
UINT msg,
WPARAM wParam,
LPARAM lParam)
{
switch (msg) {
case WM_INITDIALOG:
{
// Finds the child drop down of a File Picker dialog and sets the
// maximum amount of text it can hold when typed in manually.
// A wParam of 0 mean 0x7FFFFFFE characters.
HWND comboBox = FindWindowEx(GetParent(hwnd), nullptr,
L"ComboBoxEx32", nullptr );
if(comboBox)
SendMessage(comboBox, CB_LIMITTEXT, 0, 0);
// Store our nsFilePicker ptr for future use
OPENFILENAMEW* pofn = reinterpret_cast<OPENFILENAMEW*>(lParam);
SetProp(hwnd, kDialogPtrProp, (HANDLE)pofn->lCustData);
nsFilePicker* picker =
reinterpret_cast<nsFilePicker*>(pofn->lCustData);
if (picker) {
picker->SetDialogHandle(hwnd);
SetTimer(hwnd, kDialogTimerID, kDialogTimerTimeout, nullptr);
}
}
break;
case WM_NOTIFY:
{
LPOFNOTIFYW lpofn = (LPOFNOTIFYW) lParam;
if (!lpofn || !lpofn->lpOFN) {
return 0;
}
// CDN_SELCHANGE is sent when the selection in the list box of the file
// selection dialog changes
if (lpofn->hdr.code == CDN_SELCHANGE) {
HWND parentHWND = GetParent(hwnd);
// Get the required size for the selected files buffer
UINT newBufLength = 0;
int requiredBufLength = CommDlg_OpenSave_GetSpecW(parentHWND,
nullptr, 0);
if(requiredBufLength >= 0)
newBufLength += requiredBufLength;
else
newBufLength += MAX_PATH;
// If the user selects multiple files, the buffer contains the
// current directory followed by the file names of the selected
// files. So make room for the directory path. If the user
// selects a single file, it is no harm to add extra space.
requiredBufLength = CommDlg_OpenSave_GetFolderPathW(parentHWND,
nullptr, 0);
if(requiredBufLength >= 0)
newBufLength += requiredBufLength;
else
newBufLength += MAX_PATH;
// Check if lpstrFile and nMaxFile are large enough
if (newBufLength > lpofn->lpOFN->nMaxFile) {
if (lpofn->lpOFN->lpstrFile)
delete[] lpofn->lpOFN->lpstrFile;
// We allocate FILE_BUFFER_SIZE more bytes than is needed so that
// if the user selects a file and holds down shift and down to
// select additional items, we will not continuously reallocate
newBufLength += FILE_BUFFER_SIZE;
wchar_t* filesBuffer = new wchar_t[newBufLength];
ZeroMemory(filesBuffer, newBufLength * sizeof(wchar_t));
lpofn->lpOFN->lpstrFile = filesBuffer;
lpofn->lpOFN->nMaxFile = newBufLength;
}
}
}
break;
case WM_TIMER:
{
// Check to see if our parent has been torn down, if so, we close too.
if (wParam == kDialogTimerID) {
nsFilePicker* picker =
reinterpret_cast<nsFilePicker*>(GetProp(hwnd, kDialogPtrProp));
if (picker && picker->ClosePickerIfNeeded(true)) {
KillTimer(hwnd, kDialogTimerID);
}
}
}
break;
}
return FilePickerHook(hwnd, msg, wParam, lParam);
}
/*
* Vista+ callbacks
*/
HRESULT
nsFilePicker::OnFileOk(IFileDialog *pfd)
{
return S_OK;
}
HRESULT
nsFilePicker::OnFolderChanging(IFileDialog *pfd,
IShellItem *psiFolder)
{
return S_OK;
}
HRESULT
nsFilePicker::OnFolderChange(IFileDialog *pfd)
{
return S_OK;
}
HRESULT
nsFilePicker::OnSelectionChange(IFileDialog *pfd)
{
return S_OK;
}
HRESULT
nsFilePicker::OnShareViolation(IFileDialog *pfd,
IShellItem *psi,
FDE_SHAREVIOLATION_RESPONSE *pResponse)
{
return S_OK;
}
HRESULT
nsFilePicker::OnTypeChange(IFileDialog *pfd)
{
// Failures here result in errors due to security concerns.
RefPtr<IOleWindow> win;
pfd->QueryInterface(IID_IOleWindow, getter_AddRefs(win));
if (!win) {
NS_ERROR("Could not retrieve the IOleWindow interface for IFileDialog.");
return S_OK;
}
HWND hwnd = nullptr;
win->GetWindow(&hwnd);
if (!hwnd) {
NS_ERROR("Could not retrieve the HWND for IFileDialog.");
return S_OK;
}
SetDialogHandle(hwnd);
return S_OK;
}
HRESULT
nsFilePicker::OnOverwrite(IFileDialog *pfd,
IShellItem *psi,
FDE_OVERWRITE_RESPONSE *pResponse)
{
return S_OK;
}
/*
* Close on parent close logic
*/
bool
nsFilePicker::ClosePickerIfNeeded(bool aIsXPDialog)
{
if (!mParentWidget || !mDlgWnd)
return false;
nsWindow *win = static_cast<nsWindow *>(mParentWidget.get());
// Note, the xp callbacks hand us an inner window, so we have to step up
// one to get the actual dialog.
HWND dlgWnd;
if (aIsXPDialog)
dlgWnd = GetParent(mDlgWnd);
else
dlgWnd = mDlgWnd;
if (IsWindow(dlgWnd) && IsWindowVisible(dlgWnd) && win->DestroyCalled()) {
wchar_t className[64];
// Make sure we have the right window
if (GetClassNameW(dlgWnd, className, mozilla::ArrayLength(className)) &&
!wcscmp(className, L"#32770") &&
DestroyWindow(dlgWnd)) {
mDlgWnd = nullptr;
return true;
}
}
return false;
}
void
nsFilePicker::PickerCallbackTimerFunc(nsITimer *aTimer, void *aCtx)
{
nsFilePicker* picker = (nsFilePicker*)aCtx;
if (picker->ClosePickerIfNeeded(false)) {
aTimer->Cancel();
}
}
void
nsFilePicker::SetDialogHandle(HWND aWnd)
{
if (!aWnd || mDlgWnd)
return;
mDlgWnd = aWnd;
}
/*
* Folder picker invocation
*/
// Open the older XP style folder picker dialog. We end up in this call
// on XP systems or when platform is built without the longhorn SDK.
bool
nsFilePicker::ShowXPFolderPicker(const nsString& aInitialDir)
{
bool result = false;
auto dirBuffer = MakeUnique<wchar_t[]>(FILE_BUFFER_SIZE);
wcsncpy(dirBuffer.get(), aInitialDir.get(), FILE_BUFFER_SIZE);
dirBuffer[FILE_BUFFER_SIZE-1] = '\0';
AutoDestroyTmpWindow adtw((HWND)(mParentWidget.get() ?
mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr));
BROWSEINFOW browserInfo = {0};
browserInfo.pidlRoot = nullptr;
browserInfo.pszDisplayName = dirBuffer.get();
browserInfo.lpszTitle = mTitle.get();
browserInfo.ulFlags = BIF_USENEWUI | BIF_RETURNONLYFSDIRS;
browserInfo.hwndOwner = adtw.get();
browserInfo.iImage = 0;
browserInfo.lParam = reinterpret_cast<LPARAM>(this);
if (!aInitialDir.IsEmpty()) {
// the dialog is modal so that |initialDir.get()| will be valid in
// BrowserCallbackProc. Thus, we don't need to clone it.
browserInfo.lParam = (LPARAM) aInitialDir.get();
browserInfo.lpfn = &BrowseCallbackProc;
} else {
browserInfo.lParam = 0;
browserInfo.lpfn = nullptr;
}
LPITEMIDLIST list = ::SHBrowseForFolderW(&browserInfo);
if (list) {
result = ::SHGetPathFromIDListW(list, dirBuffer.get());
if (result)
mUnicodeFile.Assign(static_cast<const wchar_t*>(dirBuffer.get()));
// free PIDL
CoTaskMemFree(list);
}
return result;
}
/*
* Show a folder picker post Windows XP
*
* @param aInitialDir The initial directory, the last used directory will be
* used if left blank.
* @param aWasInitError Out parameter will hold true if there was an error
* before the folder picker is shown.
* @return true if a file was selected successfully.
*/
bool
nsFilePicker::ShowFolderPicker(const nsString& aInitialDir, bool &aWasInitError)
{
RefPtr<IFileOpenDialog> dialog;
if (FAILED(CoCreateInstance(CLSID_FileOpenDialog, nullptr, CLSCTX_INPROC,
IID_IFileOpenDialog,
getter_AddRefs(dialog)))) {
aWasInitError = true;
return false;
}
aWasInitError = false;
// hook up event callbacks
dialog->Advise(this, &mFDECookie);
// options
FILEOPENDIALOGOPTIONS fos = FOS_PICKFOLDERS;
dialog->SetOptions(fos);
// initial strings
dialog->SetTitle(mTitle.get());
if (!mOkButtonLabel.IsEmpty()) {
dialog->SetOkButtonLabel(mOkButtonLabel.get());
}
if (!aInitialDir.IsEmpty()) {
RefPtr<IShellItem> folder;
if (SUCCEEDED(
WinUtils::SHCreateItemFromParsingName(aInitialDir.get(), nullptr,
IID_IShellItem,
getter_AddRefs(folder)))) {
dialog->SetFolder(folder);
}
}
AutoDestroyTmpWindow adtw((HWND)(mParentWidget.get() ?
mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr));
// display
RefPtr<IShellItem> item;
if (FAILED(dialog->Show(adtw.get())) ||
FAILED(dialog->GetResult(getter_AddRefs(item))) ||
!item) {
dialog->Unadvise(mFDECookie);
return false;
}
dialog->Unadvise(mFDECookie);
// results
// If the user chose a Win7 Library, resolve to the library's
// default save folder.
RefPtr<IShellItem> folderPath;
RefPtr<IShellLibrary> shellLib;
CoCreateInstance(CLSID_ShellLibrary, nullptr, CLSCTX_INPROC,
IID_IShellLibrary, getter_AddRefs(shellLib));
if (shellLib &&
SUCCEEDED(shellLib->LoadLibraryFromItem(item, STGM_READ)) &&
SUCCEEDED(shellLib->GetDefaultSaveFolder(DSFT_DETECT, IID_IShellItem,
getter_AddRefs(folderPath)))) {
item.swap(folderPath);
}
// get the folder's file system path
return WinUtils::GetShellItemPath(item, mUnicodeFile);
}
/*
* File open and save picker invocation
*/
/* static */ bool
nsFilePicker::GetFileNameWrapper(OPENFILENAMEW* ofn, PickerType aType)
{
MOZ_SEH_TRY {
if (aType == PICKER_TYPE_OPEN)
return ::GetOpenFileNameW(ofn);
else if (aType == PICKER_TYPE_SAVE)
return ::GetSaveFileNameW(ofn);
} MOZ_SEH_EXCEPT(true) {
NS_ERROR("nsFilePicker GetFileName win32 call generated an exception! This is bad!");
}
return false;
}
bool
nsFilePicker::FilePickerWrapper(OPENFILENAMEW* ofn, PickerType aType)
{
if (!ofn)
return false;
AutoWidgetPickerState awps(mParentWidget);
return GetFileNameWrapper(ofn, aType);
}
bool
nsFilePicker::ShowXPFilePicker(const nsString& aInitialDir)
{
OPENFILENAMEW ofn = {0};
ofn.lStructSize = sizeof(ofn);
nsString filterBuffer = mFilterList;
auto fileBuffer = MakeUnique<wchar_t[]>(FILE_BUFFER_SIZE);
wcsncpy(fileBuffer.get(), mDefaultFilePath.get(), FILE_BUFFER_SIZE);
fileBuffer[FILE_BUFFER_SIZE-1] = '\0'; // null terminate in case copy truncated
if (!aInitialDir.IsEmpty()) {
ofn.lpstrInitialDir = aInitialDir.get();
}
AutoDestroyTmpWindow adtw((HWND) (mParentWidget.get() ?
mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr));
ofn.lpstrTitle = (LPCWSTR)mTitle.get();
ofn.lpstrFilter = (LPCWSTR)filterBuffer.get();
ofn.nFilterIndex = mSelectedType;
ofn.lpstrFile = fileBuffer.get();
ofn.nMaxFile = FILE_BUFFER_SIZE;
ofn.hwndOwner = adtw.get();
ofn.lCustData = reinterpret_cast<LPARAM>(this);
ofn.Flags = OFN_SHAREAWARE | OFN_LONGNAMES | OFN_OVERWRITEPROMPT |
OFN_HIDEREADONLY | OFN_PATHMUSTEXIST | OFN_ENABLESIZING |
OFN_EXPLORER;
// Windows Vista and up won't allow you to use the new looking dialogs with
// a hook procedure. The hook procedure fixes a problem on XP dialogs for
// file picker visibility. Vista and up automatically ensures the file
// picker is always visible.
if (!IsVistaOrLater()) {
ofn.lpfnHook = FilePickerHook;
ofn.Flags |= OFN_ENABLEHOOK;
}
// Handle add to recent docs settings
if (IsPrivacyModeEnabled() || !mAddToRecentDocs) {
ofn.Flags |= OFN_DONTADDTORECENT;
}
NS_NAMED_LITERAL_STRING(htmExt, "html");
if (!mDefaultExtension.IsEmpty()) {
ofn.lpstrDefExt = mDefaultExtension.get();
} else if (IsDefaultPathHtml()) {
// Get file extension from suggested filename to detect if we are
// saving an html file.
// This is supposed to append ".htm" if user doesn't supply an
// extension but the behavior is sort of weird:
// - Often appends ".html" even if you have an extension
// - It obeys your extension if you put quotes around name
ofn.lpstrDefExt = htmExt.get();
}
// When possible, instead of using OFN_NOCHANGEDIR to ensure the current
// working directory will not change from this call, we will retrieve the
// current working directory before the call and restore it after the
// call. This flag causes problems on Windows XP for paths that are
// selected like C:test.txt where the user is currently at C:\somepath
// In which case expected result should be C:\somepath\test.txt
AutoRestoreWorkingPath restoreWorkingPath;
// If we can't get the current working directory, the best case is to
// use the OFN_NOCHANGEDIR flag
if (!restoreWorkingPath.HasWorkingPath()) {
ofn.Flags |= OFN_NOCHANGEDIR;
}
bool result = false;
switch(mMode) {
case modeOpen:
// FILE MUST EXIST!
ofn.Flags |= OFN_FILEMUSTEXIST;
result = FilePickerWrapper(&ofn, PICKER_TYPE_OPEN);
break;
case modeOpenMultiple:
ofn.Flags |= OFN_FILEMUSTEXIST | OFN_ALLOWMULTISELECT;
// The hook set here ensures that the buffer returned will always be
// large enough to hold all selected files. The hook may modify the
// value of ofn.lpstrFile and deallocate the old buffer that it pointed
// to (fileBuffer). The hook assumes that the passed in value is heap
// allocated and that the returned value should be freed by the caller.
// If the hook changes the buffer, it will deallocate the old buffer.
// This fix would be nice to have in Vista and up, but it would force
// the file picker to use the old style dialogs because hooks are not
// allowed in the new file picker UI. We need to eventually move to
// the new Common File Dialogs for Vista and up.
if (!IsVistaOrLater()) {
ofn.lpfnHook = MultiFilePickerHook;
fileBuffer.release();
result = FilePickerWrapper(&ofn, PICKER_TYPE_OPEN);
fileBuffer.reset(ofn.lpstrFile);
} else {
result = FilePickerWrapper(&ofn, PICKER_TYPE_OPEN);
}
break;
case modeSave:
{
ofn.Flags |= OFN_NOREADONLYRETURN;
// Don't follow shortcuts when saving a shortcut, this can be used
// to trick users (bug 271732)
if (IsDefaultPathLink())
ofn.Flags |= OFN_NODEREFERENCELINKS;
result = FilePickerWrapper(&ofn, PICKER_TYPE_SAVE);
if (!result) {
// Error, find out what kind.
if (GetLastError() == ERROR_INVALID_PARAMETER ||
CommDlgExtendedError() == FNERR_INVALIDFILENAME) {
// Probably the default file name is too long or contains illegal
// characters. Try again, without a starting file name.
ofn.lpstrFile[0] = L'\0';
result = FilePickerWrapper(&ofn, PICKER_TYPE_SAVE);
}
}
}
break;
default:
NS_NOTREACHED("unsupported file picker mode");
return false;
}
if (!result)
return false;
// Remember what filter type the user selected
mSelectedType = (int16_t)ofn.nFilterIndex;
// Single file selection, we're done
if (mMode != modeOpenMultiple) {
GetQualifiedPath(fileBuffer.get(), mUnicodeFile);
return true;
}
// Set user-selected location of file or directory. From msdn's "Open and
// Save As Dialog Boxes" section:
// If you specify OFN_EXPLORER, the directory and file name strings are '\0'
// separated, with an extra '\0' character after the last file name. This
// format enables the Explorer-style dialog boxes to return long file names
// that include spaces.
wchar_t *current = fileBuffer.get();
nsAutoString dirName(current);
// Sometimes dirName contains a trailing slash and sometimes it doesn't:
if (current[dirName.Length() - 1] != '\\')
dirName.Append((char16_t)'\\');
while (current && *current && *(current + wcslen(current) + 1)) {
current = current + wcslen(current) + 1;
nsCOMPtr<nsIFile> file = do_CreateInstance("@mozilla.org/file/local;1");
NS_ENSURE_TRUE(file, false);
// Only prepend the directory if the path specified is a relative path
nsAutoString path;
if (PathIsRelativeW(current)) {
path = dirName + nsDependentString(current);
} else {
path = current;
}
nsAutoString canonicalizedPath;
GetQualifiedPath(path.get(), canonicalizedPath);
if (NS_FAILED(file->InitWithPath(canonicalizedPath)) ||
!mFiles.AppendObject(file))
return false;
}
// Handle the case where the user selected just one file. From msdn: If you
// specify OFN_ALLOWMULTISELECT and the user selects only one file the
// lpstrFile string does not have a separator between the path and file name.
if (current && *current && (current == fileBuffer.get())) {
nsCOMPtr<nsIFile> file = do_CreateInstance("@mozilla.org/file/local;1");
NS_ENSURE_TRUE(file, false);
nsAutoString canonicalizedPath;
GetQualifiedPath(current, canonicalizedPath);
if (NS_FAILED(file->InitWithPath(canonicalizedPath)) ||
!mFiles.AppendObject(file))
return false;
}
return true;
}
/*
* Show a file picker post Windows XP
*
* @param aInitialDir The initial directory, the last used directory will be
* used if left blank.
* @param aWasInitError Out parameter will hold true if there was an error
* before the file picker is shown.
* @return true if a file was selected successfully.
*/
bool
nsFilePicker::ShowFilePicker(const nsString& aInitialDir, bool &aWasInitError)
{
PROFILER_LABEL_FUNC(js::ProfileEntry::Category::OTHER);
RefPtr<IFileDialog> dialog;
if (mMode != modeSave) {
if (FAILED(CoCreateInstance(CLSID_FileOpenDialog, nullptr, CLSCTX_INPROC,
IID_IFileOpenDialog,
getter_AddRefs(dialog)))) {
aWasInitError = true;
return false;
}
} else {
if (FAILED(CoCreateInstance(CLSID_FileSaveDialog, nullptr, CLSCTX_INPROC,
IID_IFileSaveDialog,
getter_AddRefs(dialog)))) {
aWasInitError = true;
return false;
}
}
aWasInitError = false;
// hook up event callbacks
dialog->Advise(this, &mFDECookie);
// options
FILEOPENDIALOGOPTIONS fos = 0;
fos |= FOS_SHAREAWARE | FOS_OVERWRITEPROMPT |
FOS_FORCEFILESYSTEM;
// Handle add to recent docs settings
if (IsPrivacyModeEnabled() || !mAddToRecentDocs) {
fos |= FOS_DONTADDTORECENT;
}
// Msdn claims FOS_NOCHANGEDIR is not needed. We'll add this
// just in case.
AutoRestoreWorkingPath arw;
// mode specific
switch(mMode) {
case modeOpen:
fos |= FOS_FILEMUSTEXIST;
break;
case modeOpenMultiple:
fos |= FOS_FILEMUSTEXIST | FOS_ALLOWMULTISELECT;
break;
case modeSave:
fos |= FOS_NOREADONLYRETURN;
// Don't follow shortcuts when saving a shortcut, this can be used
// to trick users (bug 271732)
if (IsDefaultPathLink())
fos |= FOS_NODEREFERENCELINKS;
break;
}
dialog->SetOptions(fos);
// initial strings
// title
dialog->SetTitle(mTitle.get());
// default filename
if (!mDefaultFilename.IsEmpty()) {
dialog->SetFileName(mDefaultFilename.get());
}
NS_NAMED_LITERAL_STRING(htmExt, "html");
// default extension to append to new files
if (!mDefaultExtension.IsEmpty()) {
dialog->SetDefaultExtension(mDefaultExtension.get());
} else if (IsDefaultPathHtml()) {
dialog->SetDefaultExtension(htmExt.get());
}
// initial location
if (!aInitialDir.IsEmpty()) {
RefPtr<IShellItem> folder;
if (SUCCEEDED(
WinUtils::SHCreateItemFromParsingName(aInitialDir.get(), nullptr,
IID_IShellItem,
getter_AddRefs(folder)))) {
dialog->SetFolder(folder);
}
}
// filter types and the default index
if (!mComFilterList.IsEmpty()) {
dialog->SetFileTypes(mComFilterList.Length(), mComFilterList.get());
dialog->SetFileTypeIndex(mSelectedType);
}
// display
{
AutoDestroyTmpWindow adtw((HWND)(mParentWidget.get() ?
mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr));
AutoTimerCallbackCancel atcc(this, PickerCallbackTimerFunc);
AutoWidgetPickerState awps(mParentWidget);
if (FAILED(dialog->Show(adtw.get()))) {
dialog->Unadvise(mFDECookie);
return false;
}
dialog->Unadvise(mFDECookie);
}
// results
// Remember what filter type the user selected
UINT filterIdxResult;
if (SUCCEEDED(dialog->GetFileTypeIndex(&filterIdxResult))) {
mSelectedType = (int16_t)filterIdxResult;
}
// single selection
if (mMode != modeOpenMultiple) {
RefPtr<IShellItem> item;
if (FAILED(dialog->GetResult(getter_AddRefs(item))) || !item)
return false;
return WinUtils::GetShellItemPath(item, mUnicodeFile);
}
// multiple selection
RefPtr<IFileOpenDialog> openDlg;
dialog->QueryInterface(IID_IFileOpenDialog, getter_AddRefs(openDlg));
if (!openDlg) {
// should not happen
return false;
}
RefPtr<IShellItemArray> items;
if (FAILED(openDlg->GetResults(getter_AddRefs(items))) || !items) {
return false;
}
DWORD count = 0;
items->GetCount(&count);
for (unsigned int idx = 0; idx < count; idx++) {
RefPtr<IShellItem> item;
nsAutoString str;
if (SUCCEEDED(items->GetItemAt(idx, getter_AddRefs(item)))) {
if (!WinUtils::GetShellItemPath(item, str))
continue;
nsCOMPtr<nsIFile> file = do_CreateInstance("@mozilla.org/file/local;1");
if (file && NS_SUCCEEDED(file->InitWithPath(str)))
mFiles.AppendObject(file);
}
}
return true;
}
///////////////////////////////////////////////////////////////////////////////
// nsIFilePicker impl.
NS_IMETHODIMP
nsFilePicker::ShowW(int16_t *aReturnVal)
{
NS_ENSURE_ARG_POINTER(aReturnVal);
*aReturnVal = returnCancel;
AutoSuppressEvents supress(mParentWidget);
nsAutoString initialDir;
if (mDisplayDirectory)
mDisplayDirectory->GetPath(initialDir);
// If no display directory, re-use the last one.
if(initialDir.IsEmpty()) {
// Allocate copy of last used dir.
initialDir = mLastUsedUnicodeDirectory;
}
// Clear previous file selections
mUnicodeFile.Truncate();
mFiles.Clear();
// On Win10, the picker doesn't support per-monitor DPI, so we open it
// with our context set temporarily to system-dpi-aware
WinUtils::AutoSystemDpiAware dpiAwareness;
// Launch the XP file/folder picker on XP and as a fallback on Vista+.
// The CoCreateInstance call to CLSID_FileOpenDialog fails with "(0x80040111)
// ClassFactory cannot supply requested class" when the checkbox for
// Disable Visual Themes is on in the compatability tab within the shortcut
// properties.
bool result = false, wasInitError = true;
if (mMode == modeGetFolder) {
if (IsVistaOrLater())
result = ShowFolderPicker(initialDir, wasInitError);
if (!result && wasInitError)
result = ShowXPFolderPicker(initialDir);
} else {
if (IsVistaOrLater())
result = ShowFilePicker(initialDir, wasInitError);
if (!result && wasInitError)
result = ShowXPFilePicker(initialDir);
}
// exit, and return returnCancel in aReturnVal
if (!result)
return NS_OK;
RememberLastUsedDirectory();
int16_t retValue = returnOK;
if (mMode == modeSave) {
// Windows does not return resultReplace, we must check if file
// already exists.
nsCOMPtr<nsIFile> file(do_CreateInstance("@mozilla.org/file/local;1"));
bool flag = false;
if (file && NS_SUCCEEDED(file->InitWithPath(mUnicodeFile)) &&
NS_SUCCEEDED(file->Exists(&flag)) && flag) {
retValue = returnReplace;
}
}
*aReturnVal = retValue;
return NS_OK;
}
NS_IMETHODIMP
nsFilePicker::Show(int16_t *aReturnVal)
{
return ShowW(aReturnVal);
}
NS_IMETHODIMP
nsFilePicker::GetFile(nsIFile **aFile)
{
NS_ENSURE_ARG_POINTER(aFile);
*aFile = nullptr;
if (mUnicodeFile.IsEmpty())
return NS_OK;
nsCOMPtr<nsIFile> file(do_CreateInstance("@mozilla.org/file/local;1"));
NS_ENSURE_TRUE(file, NS_ERROR_FAILURE);
file->InitWithPath(mUnicodeFile);
NS_ADDREF(*aFile = file);
return NS_OK;
}
NS_IMETHODIMP
nsFilePicker::GetFileURL(nsIURI **aFileURL)
{
*aFileURL = nullptr;
nsCOMPtr<nsIFile> file;
nsresult rv = GetFile(getter_AddRefs(file));
if (!file)
return rv;
return NS_NewFileURI(aFileURL, file);
}
NS_IMETHODIMP
nsFilePicker::GetFiles(nsISimpleEnumerator **aFiles)
{
NS_ENSURE_ARG_POINTER(aFiles);
return NS_NewArrayEnumerator(aFiles, mFiles);
}
// Get the file + path
NS_IMETHODIMP
nsBaseWinFilePicker::SetDefaultString(const nsAString& aString)
{
mDefaultFilePath = aString;
// First, make sure the file name is not too long.
int32_t nameLength;
int32_t nameIndex = mDefaultFilePath.RFind("\\");
if (nameIndex == kNotFound)
nameIndex = 0;
else
nameIndex ++;
nameLength = mDefaultFilePath.Length() - nameIndex;
mDefaultFilename.Assign(Substring(mDefaultFilePath, nameIndex));
if (nameLength > MAX_PATH) {
int32_t extIndex = mDefaultFilePath.RFind(".");
if (extIndex == kNotFound)
extIndex = mDefaultFilePath.Length();
// Let's try to shave the needed characters from the name part.
int32_t charsToRemove = nameLength - MAX_PATH;
if (extIndex - nameIndex >= charsToRemove) {
mDefaultFilePath.Cut(extIndex - charsToRemove, charsToRemove);
}
}
// Then, we need to replace illegal characters. At this stage, we cannot
// replace the backslash as the string might represent a file path.
mDefaultFilePath.ReplaceChar(FILE_ILLEGAL_CHARACTERS, '-');
mDefaultFilename.ReplaceChar(FILE_ILLEGAL_CHARACTERS, '-');
return NS_OK;
}
NS_IMETHODIMP
nsBaseWinFilePicker::GetDefaultString(nsAString& aString)
{
return NS_ERROR_FAILURE;
}
// The default extension to use for files
NS_IMETHODIMP
nsBaseWinFilePicker::GetDefaultExtension(nsAString& aExtension)
{
aExtension = mDefaultExtension;
return NS_OK;
}
NS_IMETHODIMP
nsBaseWinFilePicker::SetDefaultExtension(const nsAString& aExtension)
{
mDefaultExtension = aExtension;
return NS_OK;
}
// Set the filter index
NS_IMETHODIMP
nsFilePicker::GetFilterIndex(int32_t *aFilterIndex)
{
// Windows' filter index is 1-based, we use a 0-based system.
*aFilterIndex = mSelectedType - 1;
return NS_OK;
}
NS_IMETHODIMP
nsFilePicker::SetFilterIndex(int32_t aFilterIndex)
{
// Windows' filter index is 1-based, we use a 0-based system.
mSelectedType = aFilterIndex + 1;
return NS_OK;
}
void
nsFilePicker::InitNative(nsIWidget *aParent,
const nsAString& aTitle)
{
mParentWidget = aParent;
mTitle.Assign(aTitle);
}
void
nsFilePicker::GetQualifiedPath(const wchar_t *aInPath, nsString &aOutPath)
{
// Prefer a qualified path over a non qualified path.
// Things like c:file.txt would be accepted in Win XP but would later
// fail to open from the download manager.
wchar_t qualifiedFileBuffer[MAX_PATH];
if (PathSearchAndQualifyW(aInPath, qualifiedFileBuffer, MAX_PATH)) {
aOutPath.Assign(qualifiedFileBuffer);
} else {
aOutPath.Assign(aInPath);
}
}
void
nsFilePicker::AppendXPFilter(const nsAString& aTitle, const nsAString& aFilter)
{
mFilterList.Append(aTitle);
mFilterList.Append(char16_t('\0'));
if (aFilter.EqualsLiteral("..apps"))
mFilterList.AppendLiteral("*.exe;*.com");
else
{
nsAutoString filter(aFilter);
filter.StripWhitespace();
if (filter.EqualsLiteral("*"))
filter.AppendLiteral(".*");
mFilterList.Append(filter);
}
mFilterList.Append(char16_t('\0'));
}
NS_IMETHODIMP
nsFilePicker::AppendFilter(const nsAString& aTitle, const nsAString& aFilter)
{
if (IsVistaOrLater()) {
mComFilterList.Append(aTitle, aFilter);
} else {
AppendXPFilter(aTitle, aFilter);
}
return NS_OK;
}
void
nsFilePicker::RememberLastUsedDirectory()
{
nsCOMPtr<nsIFile> file(do_CreateInstance("@mozilla.org/file/local;1"));
if (!file || NS_FAILED(file->InitWithPath(mUnicodeFile))) {
NS_WARNING("RememberLastUsedDirectory failed to init file path.");
return;
}
nsCOMPtr<nsIFile> dir;
nsAutoString newDir;
if (NS_FAILED(file->GetParent(getter_AddRefs(dir))) ||
!(mDisplayDirectory = do_QueryInterface(dir)) ||
NS_FAILED(mDisplayDirectory->GetPath(newDir)) ||
newDir.IsEmpty()) {
NS_WARNING("RememberLastUsedDirectory failed to get parent directory.");
return;
}
if (mLastUsedUnicodeDirectory) {
free(mLastUsedUnicodeDirectory);
mLastUsedUnicodeDirectory = nullptr;
}
mLastUsedUnicodeDirectory = ToNewUnicode(newDir);
}
bool
nsFilePicker::IsPrivacyModeEnabled()
{
return mLoadContext && mLoadContext->UsePrivateBrowsing();
}
bool
nsFilePicker::IsDefaultPathLink()
{
NS_ConvertUTF16toUTF8 ext(mDefaultFilePath);
ext.Trim(" .", false, true); // watch out for trailing space and dots
ToLowerCase(ext);
if (StringEndsWith(ext, NS_LITERAL_CSTRING(".lnk")) ||
StringEndsWith(ext, NS_LITERAL_CSTRING(".pif")) ||
StringEndsWith(ext, NS_LITERAL_CSTRING(".url")))
return true;
return false;
}
bool
nsFilePicker::IsDefaultPathHtml()
{
int32_t extIndex = mDefaultFilePath.RFind(".");
if (extIndex >= 0) {
nsAutoString ext;
mDefaultFilePath.Right(ext, mDefaultFilePath.Length() - extIndex);
if (ext.LowerCaseEqualsLiteral(".htm") ||
ext.LowerCaseEqualsLiteral(".html") ||
ext.LowerCaseEqualsLiteral(".shtml"))
return true;
}
return false;
}
void
nsFilePicker::ComDlgFilterSpec::Append(const nsAString& aTitle, const nsAString& aFilter)
{
COMDLG_FILTERSPEC* pSpecForward = mSpecList.AppendElement();
if (!pSpecForward) {
NS_WARNING("mSpecList realloc failed.");
return;
}
memset(pSpecForward, 0, sizeof(*pSpecForward));
nsString* pStr = mStrings.AppendElement(aTitle);
if (!pStr) {
NS_WARNING("mStrings.AppendElement failed.");
return;
}
pSpecForward->pszName = pStr->get();
pStr = mStrings.AppendElement(aFilter);
if (!pStr) {
NS_WARNING("mStrings.AppendElement failed.");
return;
}
if (aFilter.EqualsLiteral("..apps"))
pStr->AssignLiteral("*.exe;*.com");
else {
pStr->StripWhitespace();
if (pStr->EqualsLiteral("*"))
pStr->AppendLiteral(".*");
}
pSpecForward->pszSpec = pStr->get();
}
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