gecko-dev/widget/nsBaseFilePicker.cpp

372 строки
11 KiB
C++

/* -*- 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 "nsCOMPtr.h"
#include "nsPIDOMWindow.h"
#include "nsIDocShell.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIBaseWindow.h"
#include "nsIWidget.h"
#include "nsIStringBundle.h"
#include "nsXPIDLString.h"
#include "nsIServiceManager.h"
#include "nsCOMArray.h"
#include "nsIFile.h"
#include "nsEnumeratorUtils.h"
#include "mozilla/dom/File.h"
#include "mozilla/Services.h"
#include "WidgetUtils.h"
#include "nsThreadUtils.h"
#include "nsBaseFilePicker.h"
using namespace mozilla::widget;
using namespace mozilla::dom;
#define FILEPICKER_TITLES "chrome://global/locale/filepicker.properties"
#define FILEPICKER_FILTERS "chrome://global/content/filepicker.properties"
/**
* A runnable to dispatch from the main thread to the main thread to display
* the file picker while letting the showAsync method return right away.
*/
class AsyncShowFilePicker : public nsRunnable
{
public:
AsyncShowFilePicker(nsIFilePicker *aFilePicker,
nsIFilePickerShownCallback *aCallback) :
mFilePicker(aFilePicker),
mCallback(aCallback)
{
}
NS_IMETHOD Run()
{
NS_ASSERTION(NS_IsMainThread(),
"AsyncShowFilePicker should be on the main thread!");
// It's possible that some widget implementations require GUI operations
// to be on the main thread, so that's why we're not dispatching to another
// thread and calling back to the main after it's done.
int16_t result = nsIFilePicker::returnCancel;
nsresult rv = mFilePicker->Show(&result);
if (NS_FAILED(rv)) {
NS_ERROR("FilePicker's Show() implementation failed!");
}
if (mCallback) {
mCallback->Done(result);
}
return NS_OK;
}
private:
RefPtr<nsIFilePicker> mFilePicker;
RefPtr<nsIFilePickerShownCallback> mCallback;
};
class nsBaseFilePickerEnumerator : public nsISimpleEnumerator
{
public:
NS_DECL_ISUPPORTS
explicit nsBaseFilePickerEnumerator(nsPIDOMWindowOuter* aParent,
nsISimpleEnumerator* iterator,
int16_t aMode)
: mIterator(iterator)
, mParent(aParent->GetCurrentInnerWindow())
, mMode(aMode)
{}
NS_IMETHOD
GetNext(nsISupports** aResult) override
{
nsCOMPtr<nsISupports> tmp;
nsresult rv = mIterator->GetNext(getter_AddRefs(tmp));
NS_ENSURE_SUCCESS(rv, rv);
if (!tmp) {
return NS_OK;
}
nsCOMPtr<nsIFile> localFile = do_QueryInterface(tmp);
if (!localFile) {
return NS_ERROR_FAILURE;
}
RefPtr<File> domFile = File::CreateFromFile(mParent, localFile);
// Right now we're on the main thread of the chrome process. We need
// to call SetIsDirectory on the BlobImpl, but it's preferable not to
// call nsIFile::IsDirectory to determine what argument to pass since
// IsDirectory does synchronous I/O. It's true that since we've just
// been called synchronously directly after nsIFilePicker::Show blocked
// the main thread while the picker was being shown and the OS did file
// system access, doing more I/O to stat the selected files probably
// wouldn't be the end of the world. However, we can simply check
// mMode and avoid calling IsDirectory.
//
// In future we may take advantage of OS X's ability to allow both
// files and directories to be picked at the same time, so we do assert
// in debug builds that the mMode trick produces the correct results.
// If we do add that support maybe it's better to use IsDirectory
// directly, but in an nsRunnable punted off to a background thread.
#ifdef DEBUG
bool isDir;
localFile->IsDirectory(&isDir);
MOZ_ASSERT(isDir == (mMode == nsIFilePicker::modeGetFolder));
#endif
domFile->Impl()->SetIsDirectory(mMode == nsIFilePicker::modeGetFolder);
nsCOMPtr<nsIDOMBlob>(domFile).forget(aResult);
return NS_OK;
}
NS_IMETHOD
HasMoreElements(bool* aResult) override
{
return mIterator->HasMoreElements(aResult);
}
protected:
virtual ~nsBaseFilePickerEnumerator()
{}
private:
nsCOMPtr<nsISimpleEnumerator> mIterator;
nsCOMPtr<nsPIDOMWindowInner> mParent;
int16_t mMode;
};
NS_IMPL_ISUPPORTS(nsBaseFilePickerEnumerator, nsISimpleEnumerator)
nsBaseFilePicker::nsBaseFilePicker()
: mAddToRecentDocs(true)
, mMode(nsIFilePicker::modeOpen)
{
}
nsBaseFilePicker::~nsBaseFilePicker()
{
}
NS_IMETHODIMP nsBaseFilePicker::Init(mozIDOMWindowProxy* aParent,
const nsAString& aTitle,
int16_t aMode)
{
NS_PRECONDITION(aParent, "Null parent passed to filepicker, no file "
"picker for you!");
mParent = nsPIDOMWindowOuter::From(aParent);
nsCOMPtr<nsIWidget> widget = WidgetUtils::DOMWindowToWidget(mParent->GetOuterWindow());
NS_ENSURE_TRUE(widget, NS_ERROR_FAILURE);
mMode = aMode;
InitNative(widget, aTitle);
return NS_OK;
}
NS_IMETHODIMP
nsBaseFilePicker::Open(nsIFilePickerShownCallback *aCallback)
{
nsCOMPtr<nsIRunnable> filePickerEvent =
new AsyncShowFilePicker(this, aCallback);
return NS_DispatchToMainThread(filePickerEvent);
}
NS_IMETHODIMP
nsBaseFilePicker::AppendFilters(int32_t aFilterMask)
{
nsCOMPtr<nsIStringBundleService> stringService =
mozilla::services::GetStringBundleService();
if (!stringService)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIStringBundle> titleBundle, filterBundle;
nsresult rv = stringService->CreateBundle(FILEPICKER_TITLES,
getter_AddRefs(titleBundle));
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
rv = stringService->CreateBundle(FILEPICKER_FILTERS, getter_AddRefs(filterBundle));
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
nsXPIDLString title;
nsXPIDLString filter;
if (aFilterMask & filterAll) {
titleBundle->GetStringFromName(MOZ_UTF16("allTitle"), getter_Copies(title));
filterBundle->GetStringFromName(MOZ_UTF16("allFilter"), getter_Copies(filter));
AppendFilter(title,filter);
}
if (aFilterMask & filterHTML) {
titleBundle->GetStringFromName(MOZ_UTF16("htmlTitle"), getter_Copies(title));
filterBundle->GetStringFromName(MOZ_UTF16("htmlFilter"), getter_Copies(filter));
AppendFilter(title,filter);
}
if (aFilterMask & filterText) {
titleBundle->GetStringFromName(MOZ_UTF16("textTitle"), getter_Copies(title));
filterBundle->GetStringFromName(MOZ_UTF16("textFilter"), getter_Copies(filter));
AppendFilter(title,filter);
}
if (aFilterMask & filterImages) {
titleBundle->GetStringFromName(MOZ_UTF16("imageTitle"), getter_Copies(title));
filterBundle->GetStringFromName(MOZ_UTF16("imageFilter"), getter_Copies(filter));
AppendFilter(title,filter);
}
if (aFilterMask & filterAudio) {
titleBundle->GetStringFromName(MOZ_UTF16("audioTitle"), getter_Copies(title));
filterBundle->GetStringFromName(MOZ_UTF16("audioFilter"), getter_Copies(filter));
AppendFilter(title,filter);
}
if (aFilterMask & filterVideo) {
titleBundle->GetStringFromName(MOZ_UTF16("videoTitle"), getter_Copies(title));
filterBundle->GetStringFromName(MOZ_UTF16("videoFilter"), getter_Copies(filter));
AppendFilter(title,filter);
}
if (aFilterMask & filterXML) {
titleBundle->GetStringFromName(MOZ_UTF16("xmlTitle"), getter_Copies(title));
filterBundle->GetStringFromName(MOZ_UTF16("xmlFilter"), getter_Copies(filter));
AppendFilter(title,filter);
}
if (aFilterMask & filterXUL) {
titleBundle->GetStringFromName(MOZ_UTF16("xulTitle"), getter_Copies(title));
filterBundle->GetStringFromName(MOZ_UTF16("xulFilter"), getter_Copies(filter));
AppendFilter(title, filter);
}
if (aFilterMask & filterApps) {
titleBundle->GetStringFromName(MOZ_UTF16("appsTitle"), getter_Copies(title));
// Pass the magic string "..apps" to the platform filepicker, which it
// should recognize and do the correct platform behavior for.
AppendFilter(title, NS_LITERAL_STRING("..apps"));
}
return NS_OK;
}
// Set the filter index
NS_IMETHODIMP nsBaseFilePicker::GetFilterIndex(int32_t *aFilterIndex)
{
*aFilterIndex = 0;
return NS_OK;
}
NS_IMETHODIMP nsBaseFilePicker::SetFilterIndex(int32_t aFilterIndex)
{
return NS_OK;
}
NS_IMETHODIMP nsBaseFilePicker::GetFiles(nsISimpleEnumerator **aFiles)
{
NS_ENSURE_ARG_POINTER(aFiles);
nsCOMArray <nsIFile> files;
nsresult rv;
// if we get into the base class, the platform
// doesn't implement GetFiles() yet.
// so we fake it.
nsCOMPtr <nsIFile> file;
rv = GetFile(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv,rv);
files.AppendObject(file);
return NS_NewArrayEnumerator(aFiles, files);
}
// Set the display directory
NS_IMETHODIMP nsBaseFilePicker::SetDisplayDirectory(nsIFile *aDirectory)
{
if (!aDirectory) {
mDisplayDirectory = nullptr;
return NS_OK;
}
nsCOMPtr<nsIFile> directory;
nsresult rv = aDirectory->Clone(getter_AddRefs(directory));
if (NS_FAILED(rv))
return rv;
mDisplayDirectory = do_QueryInterface(directory, &rv);
return rv;
}
// Get the display directory
NS_IMETHODIMP nsBaseFilePicker::GetDisplayDirectory(nsIFile **aDirectory)
{
*aDirectory = nullptr;
if (!mDisplayDirectory)
return NS_OK;
nsCOMPtr<nsIFile> directory;
nsresult rv = mDisplayDirectory->Clone(getter_AddRefs(directory));
if (NS_FAILED(rv)) {
return rv;
}
directory.forget(aDirectory);
return NS_OK;
}
NS_IMETHODIMP
nsBaseFilePicker::GetAddToRecentDocs(bool *aFlag)
{
*aFlag = mAddToRecentDocs;
return NS_OK;
}
NS_IMETHODIMP
nsBaseFilePicker::SetAddToRecentDocs(bool aFlag)
{
mAddToRecentDocs = aFlag;
return NS_OK;
}
NS_IMETHODIMP
nsBaseFilePicker::GetMode(int16_t* aMode)
{
*aMode = mMode;
return NS_OK;
}
NS_IMETHODIMP
nsBaseFilePicker::GetDomFileOrDirectory(nsISupports** aValue)
{
nsCOMPtr<nsIFile> localFile;
nsresult rv = GetFile(getter_AddRefs(localFile));
NS_ENSURE_SUCCESS(rv, rv);
if (!localFile) {
*aValue = nullptr;
return NS_OK;
}
auto* innerParent = mParent ? mParent->GetCurrentInnerWindow() : nullptr;
RefPtr<File> domFile = File::CreateFromFile(innerParent, localFile);
domFile->Impl()->SetIsDirectory(mMode == nsIFilePicker::modeGetFolder);
nsCOMPtr<nsIDOMBlob>(domFile).forget(aValue);
return NS_OK;
}
NS_IMETHODIMP
nsBaseFilePicker::GetDomFileOrDirectoryEnumerator(nsISimpleEnumerator** aValue)
{
nsCOMPtr<nsISimpleEnumerator> iter;
nsresult rv = GetFiles(getter_AddRefs(iter));
NS_ENSURE_SUCCESS(rv, rv);
RefPtr<nsBaseFilePickerEnumerator> retIter =
new nsBaseFilePickerEnumerator(mParent, iter, mMode);
retIter.forget(aValue);
return NS_OK;
}