gecko/dom/base/nsMimeTypeArray.cpp
2012-07-30 17:20:58 +03:00

338 lines
8.0 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 "nsIScriptGlobalObject.h"
#include "nsIDOMNavigator.h"
#include "nsIDOMPluginArray.h"
#include "nsIDOMPlugin.h"
#include "nsDOMClassInfoID.h"
#include "nsIMIMEService.h"
#include "nsIMIMEInfo.h"
#include "nsIFile.h"
nsMimeTypeArray::nsMimeTypeArray(nsIDOMNavigator* navigator)
: mNavigator(navigator),
mPluginMimeTypeCount(0),
mInited(false)
{
}
nsMimeTypeArray::~nsMimeTypeArray()
{
Clear();
}
DOMCI_DATA(MimeTypeArray, nsMimeTypeArray)
// QueryInterface implementation for nsMimeTypeArray
NS_INTERFACE_MAP_BEGIN(nsMimeTypeArray)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIDOMMimeTypeArray)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(MimeTypeArray)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsMimeTypeArray)
NS_IMPL_RELEASE(nsMimeTypeArray)
NS_IMETHODIMP
nsMimeTypeArray::GetLength(PRUint32* aLength)
{
if (!mInited) {
nsresult rv = GetMimeTypes();
if (rv != NS_OK)
return rv;
}
NS_ASSERTION(mPluginMimeTypeCount <= (PRUint32)mMimeTypeArray.Count(),
"The number of total mimetypes should be equal to or higher "
"than the number of plugin mimetypes.");
*aLength = mPluginMimeTypeCount;
return NS_OK;
}
nsIDOMMimeType*
nsMimeTypeArray::GetItemAt(PRUint32 aIndex, nsresult *aResult)
{
if (!mInited) {
*aResult = GetMimeTypes();
if (*aResult != NS_OK)
return nullptr;
}
NS_ASSERTION(mPluginMimeTypeCount <= (PRUint32)mMimeTypeArray.Count(),
"The number of total mimetypes should be equal to or higher "
"than the number of plugin mimetypes.");
if (aIndex >= mPluginMimeTypeCount) {
*aResult = NS_ERROR_FAILURE;
return nullptr;
}
*aResult = NS_OK;
return mMimeTypeArray[aIndex];
}
NS_IMETHODIMP
nsMimeTypeArray::Item(PRUint32 aIndex, nsIDOMMimeType** aReturn)
{
nsresult rv;
NS_IF_ADDREF(*aReturn = GetItemAt(aIndex, &rv));
return rv;
}
nsIDOMMimeType*
nsMimeTypeArray::GetNamedItem(const nsAString& aName, nsresult* aResult)
{
if (!mInited) {
*aResult = GetMimeTypes();
if (*aResult != NS_OK)
return nullptr;
}
NS_ASSERTION(mPluginMimeTypeCount <= (PRUint32)mMimeTypeArray.Count(),
"The number of total mimetypes should be equal to or higher "
"than the number of plugin mimetypes.");
*aResult = NS_OK;
nsAutoString type;
for (PRInt32 i = 0; i < mMimeTypeArray.Count(); i++) {
nsIDOMMimeType *mtype = mMimeTypeArray[i];
mtype->GetType(type);
if (type.Equals(aName)) {
return mtype;
}
}
// Now let's check with the MIME service.
nsCOMPtr<nsIMIMEService> mimeSrv = do_GetService("@mozilla.org/mime;1");
if (mimeSrv) {
nsCOMPtr<nsIMIMEInfo> mimeInfo;
mimeSrv->GetFromTypeAndExtension(NS_ConvertUTF16toUTF8(aName), EmptyCString(),
getter_AddRefs(mimeInfo));
if (mimeInfo) {
// 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.
nsCOMPtr<nsIDOMMimeType> helper, entry;
if (!(helper = new nsHelperMimeType(aName)) ||
!(entry = new nsMimeType(nullptr, helper)) ||
!mMimeTypeArray.AppendObject(entry)) {
*aResult = NS_ERROR_OUT_OF_MEMORY;
return nullptr;
}
return entry;
}
}
return nullptr;
}
NS_IMETHODIMP
nsMimeTypeArray::NamedItem(const nsAString& aName, nsIDOMMimeType** aReturn)
{
nsresult rv;
NS_IF_ADDREF(*aReturn = GetNamedItem(aName, &rv));
return rv;
}
void
nsMimeTypeArray::Clear()
{
mInited = false;
mMimeTypeArray.Clear();
mPluginMimeTypeCount = 0;
}
void
nsMimeTypeArray::Refresh()
{
Clear();
GetMimeTypes();
}
nsresult
nsMimeTypeArray::GetMimeTypes()
{
NS_PRECONDITION(!mInited && mPluginMimeTypeCount==0,
"already initialized");
if (!mNavigator) {
return NS_ERROR_NOT_AVAILABLE;
}
nsIDOMPluginArray* pluginArray = nullptr;
nsresult rv = mNavigator->GetPlugins(&pluginArray);
if (rv == NS_OK) {
// count up all possible MimeTypes, and collect them here. Later,
// we'll remove duplicates.
PRUint32 pluginMimeTypeCount = 0;
PRUint32 pluginCount = 0;
rv = pluginArray->GetLength(&pluginCount);
if (rv == NS_OK) {
PRUint32 i;
for (i = 0; i < pluginCount; i++) {
nsCOMPtr<nsIDOMPlugin> plugin;
if (NS_SUCCEEDED(pluginArray->Item(i, getter_AddRefs(plugin))) &&
plugin) {
PRUint32 mimeTypeCount = 0;
if (plugin->GetLength(&mimeTypeCount) == NS_OK)
pluginMimeTypeCount += mimeTypeCount;
}
}
// now we know how many there are, start gathering them.
if (!mMimeTypeArray.SetCapacity(pluginMimeTypeCount))
return NS_ERROR_OUT_OF_MEMORY;
mPluginMimeTypeCount = pluginMimeTypeCount;
mInited = true;
PRUint32 k;
for (k = 0; k < pluginCount; k++) {
nsCOMPtr<nsIDOMPlugin> plugin;
if (NS_SUCCEEDED(pluginArray->Item(k, getter_AddRefs(plugin))) &&
plugin) {
PRUint32 mimeTypeCount = 0;
if (plugin->GetLength(&mimeTypeCount) == NS_OK) {
nsCOMPtr<nsIDOMMimeType> item;
for (PRUint32 j = 0; j < mimeTypeCount; j++) {
plugin->Item(j, getter_AddRefs(item));
mMimeTypeArray.AppendObject(item);
}
}
}
}
}
NS_RELEASE(pluginArray);
}
return rv;
}
nsMimeType::nsMimeType(nsIDOMPlugin* aPlugin, nsIDOMMimeType* aMimeType)
{
mPlugin = aPlugin;
mMimeType = aMimeType;
}
nsMimeType::~nsMimeType()
{
}
DOMCI_DATA(MimeType, nsMimeType)
// QueryInterface implementation for nsMimeType
NS_INTERFACE_MAP_BEGIN(nsMimeType)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIDOMMimeType)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(MimeType)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsMimeType)
NS_IMPL_RELEASE(nsMimeType)
NS_IMETHODIMP
nsMimeType::GetDescription(nsAString& aDescription)
{
return mMimeType->GetDescription(aDescription);
}
NS_IMETHODIMP
nsMimeType::GetEnabledPlugin(nsIDOMPlugin** aEnabledPlugin)
{
nsAutoString type;
GetType(type);
*aEnabledPlugin = mPlugin;
NS_IF_ADDREF(*aEnabledPlugin);
return NS_OK;
}
NS_IMETHODIMP
nsMimeType::GetSuffixes(nsAString& aSuffixes)
{
return mMimeType->GetSuffixes(aSuffixes);
}
NS_IMETHODIMP
nsMimeType::GetType(nsAString& aType)
{
return mMimeType->GetType(aType);
}
// QueryInterface implementation for nsHelperMimeType
NS_IMPL_ISUPPORTS1(nsHelperMimeType, nsIDOMMimeType)
NS_IMETHODIMP
nsHelperMimeType::GetDescription(nsAString& aDescription)
{
aDescription.Truncate();
return NS_OK;
}
NS_IMETHODIMP
nsHelperMimeType::GetEnabledPlugin(nsIDOMPlugin** aEnabledPlugin)
{
*aEnabledPlugin = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsHelperMimeType::GetSuffixes(nsAString& aSuffixes)
{
aSuffixes.Truncate();
return NS_OK;
}
NS_IMETHODIMP
nsHelperMimeType::GetType(nsAString& aType)
{
aType = mType;
return NS_OK;
}