gecko-dev/dom/base/nsMimeTypeArray.cpp

293 строки
6.4 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=79: */
/* 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 "nsMimeTypeArray.h"
#include "mozilla/dom/MimeTypeArrayBinding.h"
#include "mozilla/dom/MimeTypeBinding.h"
#include "nsIDOMNavigator.h"
#include "nsPluginArray.h"
#include "nsIMIMEService.h"
#include "nsIMIMEInfo.h"
#include "Navigator.h"
#include "nsServiceManagerUtils.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsMimeTypeArray)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsMimeTypeArray)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsMimeTypeArray)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(nsMimeTypeArray,
mWindow,
mMimeTypes)
nsMimeTypeArray::nsMimeTypeArray(nsPIDOMWindow* aWindow)
: mWindow(aWindow),
mPluginMimeTypeCount(0)
{
SetIsDOMBinding();
}
nsMimeTypeArray::~nsMimeTypeArray()
{
}
JSObject*
nsMimeTypeArray::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
{
return MimeTypeArrayBinding::Wrap(aCx, aScope, this);
}
void
nsMimeTypeArray::Refresh()
{
mMimeTypes.Clear();
mPluginMimeTypeCount = 0;
}
nsPIDOMWindow*
nsMimeTypeArray::GetParentObject() const
{
MOZ_ASSERT(mWindow);
return mWindow;
}
nsMimeType*
nsMimeTypeArray::Item(uint32_t aIndex)
{
bool unused;
return IndexedGetter(aIndex, unused);
}
nsMimeType*
nsMimeTypeArray::NamedItem(const nsAString& aName)
{
bool unused;
return NamedGetter(aName, unused);
}
nsMimeType*
nsMimeTypeArray::IndexedGetter(uint32_t aIndex, bool &aFound)
{
aFound = false;
if (mMimeTypes.IsEmpty()) {
EnsureMimeTypes();
}
MOZ_ASSERT(mMimeTypes.Length() >= mPluginMimeTypeCount);
if (aIndex >= mPluginMimeTypeCount) {
return nullptr;
}
aFound = true;
return mMimeTypes[aIndex];
}
nsMimeType*
nsMimeTypeArray::NamedGetter(const nsAString& aName, bool &aFound)
{
aFound = false;
if (mMimeTypes.IsEmpty()) {
EnsureMimeTypes();
}
for (uint32_t i = 0; i < mMimeTypes.Length(); ++i) {
if (aName.Equals(mMimeTypes[i]->Type())) {
aFound = true;
return mMimeTypes[i];
}
}
// Now let's check with the MIME service.
nsCOMPtr<nsIMIMEService> mimeSrv = do_GetService("@mozilla.org/mime;1");
if (!mimeSrv) {
return nullptr;
}
nsCOMPtr<nsIMIMEInfo> mimeInfo;
mimeSrv->GetFromTypeAndExtension(NS_ConvertUTF16toUTF8(aName), EmptyCString(),
getter_AddRefs(mimeInfo));
if (!mimeInfo) {
return nullptr;
}
// Now we check whether we can really claim to support this type
nsHandlerInfoAction action = nsIHandlerInfo::saveToDisk;
mimeInfo->GetPreferredAction(&action);
if (action != nsIMIMEInfo::handleInternally) {
bool hasHelper = false;
mimeInfo->GetHasDefaultHandler(&hasHelper);
if (!hasHelper) {
nsCOMPtr<nsIHandlerApp> helper;
mimeInfo->GetPreferredApplicationHandler(getter_AddRefs(helper));
if (!helper) {
// mime info from the OS may not have a PreferredApplicationHandler
// so just check for an empty default description
nsAutoString defaultDescription;
mimeInfo->GetDefaultDescription(defaultDescription);
if (defaultDescription.IsEmpty()) {
// no support; just leave
return nullptr;
}
}
}
}
// If we got here, we support this type! Say so.
aFound = true;
nsMimeType *mt = new nsMimeType(mWindow, aName);
mMimeTypes.AppendElement(mt);
return mt;
}
uint32_t
nsMimeTypeArray::Length()
{
if (mMimeTypes.IsEmpty()) {
EnsureMimeTypes();
}
MOZ_ASSERT(mMimeTypes.Length() >= mPluginMimeTypeCount);
return mPluginMimeTypeCount;
}
void
nsMimeTypeArray::GetSupportedNames(nsTArray< nsString >& aRetval)
{
if (mMimeTypes.IsEmpty()) {
EnsureMimeTypes();
}
for (uint32_t i = 0; i < mMimeTypes.Length(); ++i) {
aRetval.AppendElement(mMimeTypes[i]->Type());
}
}
void
nsMimeTypeArray::EnsureMimeTypes()
{
if (!mMimeTypes.IsEmpty() || !mWindow) {
return;
}
nsCOMPtr<nsIDOMNavigator> navigator;
mWindow->GetNavigator(getter_AddRefs(navigator));
if (!navigator) {
return;
}
ErrorResult rv;
nsPluginArray *pluginArray =
static_cast<Navigator*>(navigator.get())->GetPlugins(rv);
if (!pluginArray) {
return;
}
nsTArray<nsRefPtr<nsPluginElement> > plugins;
pluginArray->GetPlugins(plugins);
for (uint32_t i = 0; i < plugins.Length(); ++i) {
nsPluginElement *plugin = plugins[i];
mMimeTypes.AppendElements(plugin->MimeTypes());
}
mPluginMimeTypeCount = mMimeTypes.Length();
}
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(nsMimeType, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(nsMimeType, Release)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(nsMimeType, mWindow, mPluginElement)
nsMimeType::nsMimeType(nsPIDOMWindow* aWindow, nsPluginElement* aPluginElement,
uint32_t aPluginTagMimeIndex, const nsAString& aType)
: mWindow(aWindow),
mPluginElement(aPluginElement),
mPluginTagMimeIndex(aPluginTagMimeIndex),
mType(aType)
{
SetIsDOMBinding();
}
nsMimeType::nsMimeType(nsPIDOMWindow* aWindow, const nsAString& aType)
: mWindow(aWindow),
mPluginElement(nullptr),
mPluginTagMimeIndex(0),
mType(aType)
{
SetIsDOMBinding();
}
nsMimeType::~nsMimeType()
{
}
nsPIDOMWindow*
nsMimeType::GetParentObject() const
{
MOZ_ASSERT(mWindow);
return mWindow;
}
JSObject*
nsMimeType::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
{
return MimeTypeBinding::Wrap(aCx, aScope, this);
}
void
nsMimeType::GetDescription(nsString& retval) const
{
retval.Truncate();
if (mPluginElement) {
CopyUTF8toUTF16(mPluginElement->PluginTag()->
mMimeDescriptions[mPluginTagMimeIndex], retval);
}
}
nsPluginElement*
nsMimeType::GetEnabledPlugin() const
{
return (mPluginElement && mPluginElement->PluginTag()->IsEnabled()) ?
mPluginElement : nullptr;
}
void
nsMimeType::GetSuffixes(nsString& retval) const
{
retval.Truncate();
if (mPluginElement) {
CopyUTF8toUTF16(mPluginElement->PluginTag()->
mExtensions[mPluginTagMimeIndex], retval);
}
}
void
nsMimeType::GetType(nsString& aRetval) const
{
aRetval = mType;
}