pjs/layout/build/nsLayoutModule.cpp

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11 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1998
* Netscape Communications Corporation. All Rights Reserved.
*/
#include "nsCOMPtr.h"
#include "nsLayoutModule.h"
#include "nsLayoutCID.h"
#include "nsIComponentManager.h"
#include "nsNeckoUtil.h"
#include "nsICSSStyleSheet.h"
#include "nsICSSLoader.h"
#include "nsHTMLAtoms.h"
#include "nsCSSKeywords.h" // to addref/release table
#include "nsCSSProps.h" // to addref/release table
#include "nsCSSAtoms.h" // to addref/release table
#include "nsColorNames.h" // to addref/release table
#ifdef INCLUDE_XUL
#include "nsXULAtoms.h"
#endif
#include "nsLayoutAtoms.h"
#include "nsDOMCID.h"
#include "nsIScriptContext.h"
#include "nsINameSpaceManager.h"
#include "nsIScriptNameSetRegistry.h"
#include "nsIScriptNameSpaceManager.h"
#include "nsIScriptExternalNameSet.h"
#include "nsIDocumentEncoder.h"
// XXX
#include "nsIServiceManager.h"
// URL for the "user agent" style sheet
#define UA_CSS_URL "resource:/res/ua.css"
static nsLayoutModule *gModule = NULL;
extern "C" NS_EXPORT nsresult NSGetModule(nsIComponentManager *servMgr,
nsIFileSpec* location,
nsIModule** return_cobj)
{
nsresult rv = NS_OK;
NS_ASSERTION(return_cobj, "Null argument");
NS_ASSERTION(gModule == NULL, "nsLayoutModule: Module already created.");
// Create an initialize the layout module instance
nsLayoutModule *m = new nsLayoutModule();
if (!m) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Increase refcnt and store away nsIModule interface to m in return_cobj
rv = m->QueryInterface(nsIModule::GetIID(), (void**)return_cobj);
if (NS_FAILED(rv)) {
delete m;
m = nsnull;
}
gModule = m; // WARNING: Weak Reference
return rv;
}
//----------------------------------------------------------------------
static NS_DEFINE_IID(kIScriptNameSetRegistryIID, NS_ISCRIPTNAMESETREGISTRY_IID);
static NS_DEFINE_IID(kCScriptNameSetRegistryCID, NS_SCRIPT_NAMESET_REGISTRY_CID);
static NS_DEFINE_IID(kIScriptNameSpaceManagerIID, NS_ISCRIPTNAMESPACEMANAGER_IID);
static NS_DEFINE_IID(kIScriptExternalNameSetIID, NS_ISCRIPTEXTERNALNAMESET_IID);
class LayoutScriptNameSet : public nsIScriptExternalNameSet {
public:
LayoutScriptNameSet();
virtual ~LayoutScriptNameSet();
NS_DECL_ISUPPORTS
NS_IMETHOD InitializeClasses(nsIScriptContext* aScriptContext);
NS_IMETHOD AddNameSet(nsIScriptContext* aScriptContext);
};
LayoutScriptNameSet::LayoutScriptNameSet()
{
NS_INIT_REFCNT();
}
LayoutScriptNameSet::~LayoutScriptNameSet()
{
}
NS_IMPL_ISUPPORTS(LayoutScriptNameSet, kIScriptExternalNameSetIID);
NS_IMETHODIMP
LayoutScriptNameSet::InitializeClasses(nsIScriptContext* aScriptContext)
{
return NS_OK;
}
NS_IMETHODIMP
LayoutScriptNameSet::AddNameSet(nsIScriptContext* aScriptContext)
{
nsresult result = NS_OK;
nsIScriptNameSpaceManager* manager;
static NS_DEFINE_IID(kHTMLImageElementCID, NS_HTMLIMAGEELEMENT_CID);
static NS_DEFINE_IID(kHTMLOptionElementCID, NS_HTMLOPTIONELEMENT_CID);
result = aScriptContext->GetNameSpaceManager(&manager);
if (NS_OK == result) {
result = manager->RegisterGlobalName("HTMLImageElement",
kHTMLImageElementCID,
PR_TRUE);
if (NS_FAILED(result)) {
NS_RELEASE(manager);
return result;
}
result = manager->RegisterGlobalName("HTMLOptionElement",
kHTMLOptionElementCID,
PR_TRUE);
if (NS_FAILED(result)) {
NS_RELEASE(manager);
return result;
}
NS_RELEASE(manager);
}
return result;
}
//----------------------------------------------------------------------
static NS_DEFINE_IID(kIModuleIID, NS_IMODULE_IID);
nsICSSStyleSheet* nsLayoutModule::gUAStyleSheet;
nsIScriptNameSetRegistry* nsLayoutModule::gRegistry;
nsLayoutModule::nsLayoutModule()
: mInitialized(PR_FALSE)
{
NS_INIT_ISUPPORTS();
#ifdef DEBUG_kipp
printf("*** Creating layout module %p\n", this);
#endif
}
nsLayoutModule::~nsLayoutModule()
{
Shutdown();
#ifdef DEBUG_kipp
printf("*** Destroying layout module %p\n", this);
#endif
}
NS_IMPL_ISUPPORTS(nsLayoutModule, kIModuleIID)
// Perform our one-time intialization for this module
nsresult
nsLayoutModule::Initialize()
{
if (mInitialized) {
return NS_OK;
}
// Register all of our atoms once
nsCSSAtoms::AddRefAtoms();
nsCSSKeywords::AddRefTable();
nsCSSProps::AddRefTable();
nsColorNames::AddRefTable();
nsHTMLAtoms::AddRefAtoms();
nsLayoutAtoms::AddRefAtoms();
#ifdef INCLUDE_XUL
nsXULAtoms::AddRefAtoms();
#endif
// Load the UA style sheet
nsCOMPtr<nsIURI> uaURL;
nsresult rv = NS_NewURI(getter_AddRefs(uaURL), UA_CSS_URL);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsICSSLoader> cssLoader;
rv = NS_NewCSSLoader(getter_AddRefs(cssLoader));
if (cssLoader) {
PRBool complete;
rv = cssLoader->LoadAgentSheet(uaURL, gUAStyleSheet, complete,
nsnull, nsnull);
}
}
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("*** open of %s failed: error=%x\n", UA_CSS_URL, rv);
#endif
return rv;
}
// XXX Initialize the script name set thingy-ma-jigger
if (!gRegistry) {
rv = nsServiceManager::GetService(kCScriptNameSetRegistryCID,
kIScriptNameSetRegistryIID,
(nsISupports**) &gRegistry);
if (NS_SUCCEEDED(rv)) {
LayoutScriptNameSet* nameSet = new LayoutScriptNameSet();
gRegistry->AddExternalNameSet(nameSet);
}
}
return rv;
}
// Shutdown this module, releasing all of the module resources
void
nsLayoutModule::Shutdown()
{
// Release all of our atoms
nsColorNames::ReleaseTable();
nsCSSProps::ReleaseTable();
nsCSSKeywords::ReleaseTable();
nsCSSAtoms::ReleaseAtoms();
nsHTMLAtoms::ReleaseAtoms();
nsLayoutAtoms::ReleaseAtoms();
#ifdef INCLUDE_XUL
nsXULAtoms::ReleaseAtoms();
#endif
NS_IF_RELEASE(gRegistry);
NS_IF_RELEASE(gUAStyleSheet);
}
NS_IMETHODIMP
nsLayoutModule::GetClassObject(nsIComponentManager *aCompMgr,
const nsCID& aClass,
const nsIID& aIID,
void** r_classObj)
{
nsresult rv;
if (!mInitialized) {
rv = Initialize();
if (NS_FAILED(rv)) {
return rv;
}
mInitialized = PR_TRUE;
}
nsIFactory* f = new nsLayoutFactory(aClass);
if (!f) {
return NS_ERROR_OUT_OF_MEMORY;
}
rv = f->QueryInterface(aIID, r_classObj);
if (NS_FAILED(rv)) {
delete f;
}
return rv;
}
//----------------------------------------
struct Components {
const char* mDescription;
nsID mCID;
const char* mProgID;
};
// The list of components we register
static Components gComponents[] = {
{ "Namespace manager", NS_NAMESPACEMANAGER_CID, nsnull, },
{ "Event listener manager", NS_EVENTLISTENERMANAGER_CID, nsnull, },
{ "Frame utility", NS_FRAME_UTIL_CID, nsnull, },
{ "Print preview context", NS_PRINT_PREVIEW_CONTEXT_CID, nsnull, },
{ "Layout debugger", NS_LAYOUT_DEBUGGER_CID, nsnull, },
{ "HTML document", NS_HTMLDOCUMENT_CID, nsnull, },
{ "HTML style sheet", NS_HTMLSTYLESHEET_CID, nsnull, },
{ "HTML-CSS style sheet", NS_HTML_CSS_STYLESHEET_CID, nsnull, },
{ "XML document", NS_XMLDOCUMENT_CID, nsnull, },
{ "Image document", NS_IMAGEDOCUMENT_CID, nsnull, },
{ "CSS parser", NS_CSSPARSER_CID, nsnull, },
{ "CSS loader", NS_CSS_LOADER_CID, nsnull, },
{ "HTML element factory", NS_HTML_ELEMENT_FACTORY_CID, nsnull, },
{ "Text element", NS_TEXTNODE_CID, nsnull, },
{ "Selection", NS_SELECTION_CID, nsnull, },
{ "Frame selection", NS_FRAMESELECTION_CID, nsnull, },
{ "Range", NS_RANGE_CID, nsnull, },
{ "Content iterator", NS_CONTENTITERATOR_CID, nsnull, },
{ "Subtree iterator", NS_SUBTREEITERATOR_CID, nsnull, },
// XXX ick
{ "HTML image element", NS_HTMLIMAGEELEMENT_CID, nsnull, },
{ "HTML option element", NS_HTMLOPTIONELEMENT_CID, nsnull, },
{ "Presentation shell", NS_PRESSHELL_CID, nsnull, },
// XXX end ick
{ "HTML document encoder", NS_TEXT_ENCODER_CID,
NS_DOC_ENCODER_PROGID_BASE "text/html", },
{ "Plaintext document encoder", NS_TEXT_ENCODER_CID,
NS_DOC_ENCODER_PROGID_BASE "text/plain", },
{ "XIF document encoder", NS_TEXT_ENCODER_CID,
NS_DOC_ENCODER_PROGID_BASE "text/xif", },
};
#define NUM_COMPONENTS (sizeof(gComponents) / sizeof(gComponents[0]))
NS_IMETHODIMP
nsLayoutModule::RegisterSelf(nsIComponentManager *aCompMgr,
nsIFileSpec* aPath,
const char* registryLocation,
const char* componentType)
{
nsresult rv = NS_OK;
#ifdef DEBUG
printf("*** Registering layout components\n");
#endif
Components* cp = gComponents;
Components* end = cp + NUM_COMPONENTS;
while (cp < end) {
rv = aCompMgr->RegisterComponentSpec(cp->mCID, cp->mDescription,
cp->mProgID, aPath, PR_TRUE, PR_TRUE);
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("nsLayoutModule: unable to register %s component => %x\n",
cp->mDescription, rv);
#endif
break;
}
cp++;
}
rv = RegisterDocumentFactories(aCompMgr, aPath);
return rv;
}
NS_IMETHODIMP
nsLayoutModule::UnregisterSelf(nsIComponentManager* aCompMgr,
nsIFileSpec* aPath,
const char* registryLocation)
{
#ifdef DEBUG
printf("*** Unregistering layout components\n");
#endif
Components* cp = gComponents;
Components* end = cp + NUM_COMPONENTS;
while (cp < end) {
nsresult rv = aCompMgr->UnregisterComponentSpec(cp->mCID, aPath);
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("nsLayoutModule: unable to unregister %s component => %x\n",
cp->mDescription, rv);
#endif
}
cp++;
}
UnregisterDocumentFactories(aCompMgr, aPath);
return NS_OK;
}
NS_IMETHODIMP
nsLayoutModule::CanUnload(nsIComponentManager *aCompMgr, PRBool *okToUnload)
{
if (!okToUnload) {
return NS_ERROR_INVALID_POINTER;
}
*okToUnload = PR_FALSE;
return NS_ERROR_FAILURE;
}