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Bug 1852839 - Part 1: Add nsIFilePicker.isModeSupported method. r=spohl

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Differential Revision: https://phabricator.services.mozilla.com/D188131
This commit is contained in:
Mike Conley 2023-09-19 19:44:50 +00:00
parent 6c0040ad81
commit 88ab9ee914
3 changed files with 39 additions and 1 deletions
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25
widget/nsBaseFilePicker.cpp
View File

@ -16,6 +16,7 @@
#include "nsEnumeratorUtils.h"
#include "mozilla/dom/Directory.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/Components.h"
#include "WidgetUtils.h"
#include "nsSimpleEnumerator.h"
@ -25,6 +26,7 @@
using namespace mozilla::widget;
using namespace mozilla::dom;
using mozilla::ErrorResult;
#define FILEPICKER_TITLES "chrome://global/locale/filepicker.properties"
#define FILEPICKER_FILTERS "chrome://global/content/filepicker.properties"
@ -165,6 +167,29 @@ NS_IMETHODIMP nsBaseFilePicker::Init(mozIDOMWindowProxy* aParent,
return NS_OK;
}
NS_IMETHODIMP
nsBaseFilePicker::IsModeSupported(nsIFilePicker::Mode aMode, JSContext* aCx,
Promise** aPromise) {
MOZ_ASSERT(aCx);
MOZ_ASSERT(aPromise);
nsIGlobalObject* globalObject = xpc::CurrentNativeGlobal(aCx);
if (NS_WARN_IF(!globalObject)) {
return NS_ERROR_FAILURE;
}
ErrorResult result;
RefPtr<Promise> promise = Promise::Create(globalObject, result);
if (NS_WARN_IF(result.Failed())) {
return result.StealNSResult();
}
promise->MaybeResolve(true);
promise.forget(aPromise);
return NS_OK;
}
NS_IMETHODIMP
nsBaseFilePicker::Open(nsIFilePickerShownCallback* aCallback) {
nsCOMPtr<nsIRunnable> filePickerEvent =

3
widget/nsBaseFilePicker.h
View File

@ -27,7 +27,8 @@ class nsBaseFilePicker : public nsIFilePicker {
NS_IMETHOD Init(mozIDOMWindowProxy* aParent, const nsAString& aTitle,
nsIFilePicker::Mode aMode) override;
NS_IMETHOD IsModeSupported(nsIFilePicker::Mode aMode, JSContext* aCx,
mozilla::dom::Promise** aPromise) override;
NS_IMETHOD Open(nsIFilePickerShownCallback* aCallback) override;
NS_IMETHOD AppendFilters(int32_t filterMask) override;
NS_IMETHOD AppendRawFilter(const nsAString& aFilter) override;

12
widget/nsIFilePicker.idl
View File

@ -73,6 +73,18 @@ interface nsIFilePicker : nsISupports
*/
void init(in mozIDOMWindowProxy parent, in AString title, in nsIFilePicker_Mode mode);
/**
* Returns a Promise that resolves to true if the passed nsIFilePicker mode
* is supported on the current platform, and false otherwise. The Promise may
* reject if something unexpected occurs while trying to determine if the mode
* is supported.
*
* @param mode
* @return Promise<boolean>
*/
[implicit_jscontext]
Promise isModeSupported(in nsIFilePicker_Mode mode);
/**
* Append to the filter list with things from the predefined list
*