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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim:expandtab:shiftwidth=2:tabstop=2:cin:
* 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
#include "nsLocalHandlerApp.h"
#include "nsIURI.h"
#include "nsIProcess.h"
#include "nsComponentManagerUtils.h"
#include "mozilla/dom/Promise.h"
#include "nsProxyRelease.h"
// XXX why does nsMIMEInfoImpl have a threadsafe nsISupports? do we need one
// here too?
NS_IMPL_ISUPPORTS(nsLocalHandlerApp, nsILocalHandlerApp, nsIHandlerApp)
using namespace mozilla;
////////////////////////////////////////////////////////////////////////////////
//// nsIHandlerApp
NS_IMETHODIMP nsLocalHandlerApp::GetName(nsAString& aName) {
if (mName.IsEmpty() && mExecutable) {
// Don't want to cache this, just in case someone resets the app
// without changing the description....
mExecutable->GetLeafName(aName);
} else {
aName.Assign(mName);
}
return NS_OK;
}
/**
* This method returns a std::function that will be executed on a thread other
* than the main thread. To facilitate things, it should effectively be a global
* function that does not maintain a reference to the this pointer. There should
* be no reference to any objects that will be shared across threads. Sub-class
* implementations should make local copies of everything they need and capture
* those in the callback.
*/
std::function<nsresult(nsString&)>
nsLocalHandlerApp::GetPrettyNameOnNonMainThreadCallback() {
nsString name;
// Calculate the name now, on the main thread, so as to avoid
// doing anything with the this pointer on the other thread
auto result = GetName(name);
return [name, result](nsString& aName) -> nsresult {
aName = name;
return result;
};
}
NS_IMETHODIMP
nsLocalHandlerApp::PrettyNameAsync(JSContext* aCx, dom::Promise** aPromise) {
NS_ENSURE_ARG_POINTER(aPromise);
*aPromise = nullptr;
if (!mExecutable) {
return NS_ERROR_FAILURE;
}
nsIGlobalObject* global = xpc::CurrentNativeGlobal(aCx);
if (NS_WARN_IF(!global)) {
return NS_ERROR_FAILURE;
}
ErrorResult err;
RefPtr<dom::Promise> outer = dom::Promise::Create(global, err);
if (NS_WARN_IF(err.Failed())) {
return err.StealNSResult();
}
outer.forget(aPromise);
nsAutoString executablePath;
nsresult result = mExecutable->GetPath(executablePath);
if (NS_FAILED(result) || executablePath.IsEmpty()) {
(*aPromise)->MaybeReject(result);
return NS_OK;
}
nsMainThreadPtrHandle<dom::Promise> promiseHolder(
new nsMainThreadPtrHolder<dom::Promise>(
"nsLocalHandlerApp::prettyExecutableName Promise", *aPromise));
auto prettyNameGetter = GetPrettyNameOnNonMainThreadCallback();
result = NS_DispatchBackgroundTask(
NS_NewRunnableFunction(
__func__,
[promiseHolder /* can't move this because if the dispatch fails, we
call reject on the promiseHolder */
,
prettyNameGetter = std::move(prettyNameGetter)]() mutable -> void {
nsAutoString prettyExecutableName;
nsresult result = prettyNameGetter(prettyExecutableName);
DebugOnly<nsresult> rv =
NS_DispatchToMainThread(NS_NewRunnableFunction(
__func__,
[promiseHolder = std::move(promiseHolder),
prettyExecutableName = std::move(prettyExecutableName),
result]() {
if (NS_FAILED(result)) {
promiseHolder.get()->MaybeReject(result);
} else {
promiseHolder.get()->MaybeResolve(prettyExecutableName);
}
}));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"NS_DispatchToMainThread failed");
}),
NS_DISPATCH_EVENT_MAY_BLOCK);
if (NS_FAILED(result)) {
promiseHolder.get()->MaybeReject(result);
}
return NS_OK;
}
NS_IMETHODIMP nsLocalHandlerApp::SetName(const nsAString& aName) {
mName.Assign(aName);
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::SetDetailedDescription(const nsAString& aDescription) {
mDetailedDescription.Assign(aDescription);
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::GetDetailedDescription(nsAString& aDescription) {
aDescription.Assign(mDetailedDescription);
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::Equals(nsIHandlerApp* aHandlerApp, bool* _retval) {
NS_ENSURE_ARG_POINTER(aHandlerApp);
*_retval = false;
// If the handler app isn't a local handler app, then it's not the same app.
nsCOMPtr<nsILocalHandlerApp> localHandlerApp = do_QueryInterface(aHandlerApp);
if (!localHandlerApp) return NS_OK;
// If either handler app doesn't have an executable, then they aren't
// the same app.
nsCOMPtr<nsIFile> executable;
nsresult rv = localHandlerApp->GetExecutable(getter_AddRefs(executable));
if (NS_FAILED(rv)) return rv;
// Equality for two empty nsIHandlerApp
if (!executable && !mExecutable) {
*_retval = true;
return NS_OK;
}
// At least one is set so they are not equal
if (!mExecutable || !executable) return NS_OK;
// Check the command line parameter list lengths
uint32_t len;
localHandlerApp->GetParameterCount(&len);
if (mParameters.Length() != len) return NS_OK;
// Check the command line params lists
for (uint32_t idx = 0; idx < mParameters.Length(); idx++) {
nsAutoString param;
if (NS_FAILED(localHandlerApp->GetParameter(idx, param)) ||
!param.Equals(mParameters[idx]))
return NS_OK;
}
return executable->Equals(mExecutable, _retval);
}
NS_IMETHODIMP
nsLocalHandlerApp::LaunchWithURI(
nsIURI* aURI, mozilla::dom::BrowsingContext* aBrowsingContext) {
// pass the entire URI to the handler.
nsAutoCString spec;
aURI->GetAsciiSpec(spec);
return LaunchWithIProcess(spec);
}
nsresult nsLocalHandlerApp::LaunchWithIProcess(const nsCString& aArg) {
nsresult rv;
nsCOMPtr<nsIProcess> process = do_CreateInstance(NS_PROCESS_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
if (NS_FAILED(rv = process->Init(mExecutable))) return rv;
const char* string = aArg.get();
return process->Run(false, &string, 1);
}
////////////////////////////////////////////////////////////////////////////////
//// nsILocalHandlerApp
NS_IMETHODIMP
nsLocalHandlerApp::GetExecutable(nsIFile** aExecutable) {
NS_IF_ADDREF(*aExecutable = mExecutable);
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::SetExecutable(nsIFile* aExecutable) {
mExecutable = aExecutable;
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::GetParameterCount(uint32_t* aParameterCount) {
*aParameterCount = mParameters.Length();
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::ClearParameters() {
mParameters.Clear();
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::AppendParameter(const nsAString& aParam) {
mParameters.AppendElement(aParam);
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::GetParameter(uint32_t parameterIndex, nsAString& _retval) {
if (mParameters.Length() <= parameterIndex) return NS_ERROR_INVALID_ARG;
_retval.Assign(mParameters[parameterIndex]);
return NS_OK;
}
NS_IMETHODIMP
nsLocalHandlerApp::ParameterExists(const nsAString& aParam, bool* _retval) {
*_retval = mParameters.Contains(aParam);
return NS_OK;
}