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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/mscom/EnsureMTA.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::IsWin8OrLater;
using mozilla::MakeUnique;
using mozilla::mscom::EnsureMTA;
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;
}
/*
* 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()
{
if (!mParentWidget || !mDlgWnd)
return false;
nsWindow *win = static_cast<nsWindow *>(mParentWidget.get());
if (IsWindow(mDlgWnd) && IsWindowVisible(mDlgWnd) && win->DestroyCalled()) {
wchar_t className[64];
// Make sure we have the right window
if (GetClassNameW(mDlgWnd, className, mozilla::ArrayLength(className)) &&
!wcscmp(className, L"#32770") &&
DestroyWindow(mDlgWnd)) {
mDlgWnd = nullptr;
return true;
}
}
return false;
}
void
nsFilePicker::PickerCallbackTimerFunc(nsITimer *aTimer, void *aCtx)
{
nsFilePicker* picker = (nsFilePicker*)aCtx;
if (picker->ClosePickerIfNeeded()) {
aTimer->Cancel();
}
}
void
nsFilePicker::SetDialogHandle(HWND aWnd)
{
if (!aWnd || mDlgWnd)
return;
mDlgWnd = aWnd;
}
/*
* Folder picker invocation
*/
/*
* Show a folder picker.
*
* @param aInitialDir The initial directory, the last used directory will be
* used if left blank.
* @return true if a file was selected successfully.
*/
bool
nsFilePicker::ShowFolderPicker(const nsString& aInitialDir)
{
if (!IsWin8OrLater()) {
// Some Windows 7 users are experiencing a race condition when some dlls
// that are loaded by the file picker cause a crash while attempting to shut
// down the COM multithreaded apartment. By instantiating EnsureMTA, we hold
// an additional reference to the MTA that should prevent this race, since
// the MTA will remain alive until shutdown.
EnsureMTA ensureMTA;
}
RefPtr<IFileOpenDialog> dialog;
if (FAILED(CoCreateInstance(CLSID_FileOpenDialog, nullptr, CLSCTX_INPROC,
IID_IFileOpenDialog,
getter_AddRefs(dialog)))) {
return 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
*/
/*
* Show a file picker.
*
* @param aInitialDir The initial directory, the last used directory will be
* used if left blank.
* @return true if a file was selected successfully.
*/
bool
nsFilePicker::ShowFilePicker(const nsString& aInitialDir)
{
PROFILER_LABEL_FUNC(js::ProfileEntry::Category::OTHER);
if (!IsWin8OrLater()) {
// Some Windows 7 users are experiencing a race condition when some dlls
// that are loaded by the file picker cause a crash while attempting to shut
// down the COM multithreaded apartment. By instantiating EnsureMTA, we hold
// an additional reference to the MTA that should prevent this race, since
// the MTA will remain alive until shutdown.
EnsureMTA ensureMTA;
}
RefPtr<IFileDialog> dialog;
if (mMode != modeSave) {
if (FAILED(CoCreateInstance(CLSID_FileOpenDialog, nullptr, CLSCTX_INPROC,
IID_IFileOpenDialog,
getter_AddRefs(dialog)))) {
return false;
}
} else {
if (FAILED(CoCreateInstance(CLSID_FileSaveDialog, nullptr, CLSCTX_INPROC,
IID_IFileSaveDialog,
getter_AddRefs(dialog)))) {
return 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;
bool result = false;
if (mMode == modeGetFolder) {
result = ShowFolderPicker(initialDir);
} else {
result = ShowFilePicker(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);
}
NS_IMETHODIMP
nsFilePicker::AppendFilter(const nsAString& aTitle, const nsAString& aFilter)
{
mComFilterList.Append(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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