gecko-dev/dom/xul/templates/nsXULContentUtils.cpp

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C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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/.
*
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 03/27/2000 IBM Corp. Added PR_CALLBACK for Optlink
* use in OS2
*/
/*
A package of routines shared by the XUL content code.
*/
#include "mozilla/ArrayUtils.h"
#include "DateTimeFormat.h"
#include "nsCOMPtr.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIDOMElement.h"
#include "nsIDOMXULCommandDispatcher.h"
#include "nsIDOMXULDocument.h"
#include "nsIRDFNode.h"
#include "nsIRDFService.h"
#include "nsIServiceManager.h"
#include "nsIURL.h"
#include "nsXULContentUtils.h"
#include "nsLayoutCID.h"
#include "nsNameSpaceManager.h"
#include "nsRDFCID.h"
#include "nsString.h"
#include "nsXPIDLString.h"
#include "nsGkAtoms.h"
#include "mozilla/Logging.h"
#include "prtime.h"
#include "rdf.h"
#include "nsContentUtils.h"
#include "nsIScriptableDateFormat.h"
#include "nsICollation.h"
#include "nsCollationCID.h"
#include "nsILocale.h"
#include "nsILocaleService.h"
#include "nsIConsoleService.h"
#include "nsEscape.h"
using namespace mozilla;
//------------------------------------------------------------------------
nsIRDFService* nsXULContentUtils::gRDF;
nsICollation *nsXULContentUtils::gCollation;
extern LazyLogModule gXULTemplateLog;
#define XUL_RESOURCE(ident, uri) nsIRDFResource* nsXULContentUtils::ident
#define XUL_LITERAL(ident, val) nsIRDFLiteral* nsXULContentUtils::ident
#include "nsXULResourceList.h"
#undef XUL_RESOURCE
#undef XUL_LITERAL
//------------------------------------------------------------------------
// Constructors n' stuff
//
nsresult
nsXULContentUtils::Init()
{
static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
nsresult rv = CallGetService(kRDFServiceCID, &gRDF);
if (NS_FAILED(rv)) {
return rv;
}
#define XUL_RESOURCE(ident, uri) \
PR_BEGIN_MACRO \
rv = gRDF->GetResource(NS_LITERAL_CSTRING(uri), &(ident)); \
if (NS_FAILED(rv)) return rv; \
PR_END_MACRO
#define XUL_LITERAL(ident, val) \
PR_BEGIN_MACRO \
rv = gRDF->GetLiteral(val, &(ident)); \
if (NS_FAILED(rv)) return rv; \
PR_END_MACRO
#include "nsXULResourceList.h"
#undef XUL_RESOURCE
#undef XUL_LITERAL
return NS_OK;
}
nsresult
nsXULContentUtils::Finish()
{
NS_IF_RELEASE(gRDF);
#define XUL_RESOURCE(ident, uri) NS_IF_RELEASE(ident)
#define XUL_LITERAL(ident, val) NS_IF_RELEASE(ident)
#include "nsXULResourceList.h"
#undef XUL_RESOURCE
#undef XUL_LITERAL
NS_IF_RELEASE(gCollation);
return NS_OK;
}
nsICollation*
nsXULContentUtils::GetCollation()
{
if (!gCollation) {
nsresult rv;
// get a locale service
nsCOMPtr<nsILocaleService> localeService =
do_GetService(NS_LOCALESERVICE_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsILocale> locale;
rv = localeService->GetApplicationLocale(getter_AddRefs(locale));
if (NS_SUCCEEDED(rv) && locale) {
nsCOMPtr<nsICollationFactory> colFactory =
do_CreateInstance(NS_COLLATIONFACTORY_CONTRACTID);
if (colFactory) {
rv = colFactory->CreateCollation(locale, &gCollation);
NS_ASSERTION(NS_SUCCEEDED(rv),
"couldn't create collation instance");
} else
NS_ERROR("couldn't create instance of collation factory");
} else
NS_ERROR("unable to get application locale");
} else
NS_ERROR("couldn't get locale factory");
}
return gCollation;
}
//------------------------------------------------------------------------
nsresult
nsXULContentUtils::FindChildByTag(nsIContent* aElement,
int32_t aNameSpaceID,
nsIAtom* aTag,
nsIContent** aResult)
{
for (nsIContent* child = aElement->GetFirstChild();
child;
child = child->GetNextSibling()) {
if (child->NodeInfo()->Equals(aTag, aNameSpaceID)) {
NS_ADDREF(*aResult = child);
return NS_OK;
}
}
*aResult = nullptr;
return NS_RDF_NO_VALUE; // not found
}
/*
Note: this routine is similar, yet distinctly different from, nsBookmarksService::GetTextForNode
*/
nsresult
nsXULContentUtils::GetTextForNode(nsIRDFNode* aNode, nsAString& aResult)
{
if (! aNode) {
aResult.Truncate();
return NS_OK;
}
nsresult rv;
// Literals are the most common, so try these first.
nsCOMPtr<nsIRDFLiteral> literal = do_QueryInterface(aNode);
if (literal) {
const char16_t* p;
rv = literal->GetValueConst(&p);
if (NS_FAILED(rv)) return rv;
aResult = p;
return NS_OK;
}
nsCOMPtr<nsIRDFDate> dateLiteral = do_QueryInterface(aNode);
if (dateLiteral) {
PRTime value;
rv = dateLiteral->GetValue(&value);
if (NS_FAILED(rv)) return rv;
nsAutoString str;
rv = DateTimeFormat::FormatPRTime(kDateFormatShort,
kTimeFormatSeconds,
value,
str);
aResult.Assign(str);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
nsCOMPtr<nsIRDFInt> intLiteral = do_QueryInterface(aNode);
if (intLiteral) {
int32_t value;
rv = intLiteral->GetValue(&value);
if (NS_FAILED(rv)) return rv;
aResult.Truncate();
nsAutoString intStr;
intStr.AppendInt(value, 10);
aResult.Append(intStr);
return NS_OK;
}
nsCOMPtr<nsIRDFResource> resource = do_QueryInterface(aNode);
if (resource) {
const char* p;
rv = resource->GetValueConst(&p);
if (NS_FAILED(rv)) return rv;
CopyUTF8toUTF16(p, aResult);
return NS_OK;
}
NS_ERROR("not a resource or a literal");
return NS_ERROR_UNEXPECTED;
}
nsresult
nsXULContentUtils::GetResource(int32_t aNameSpaceID, nsIAtom* aAttribute, nsIRDFResource** aResult)
{
// construct a fully-qualified URI from the namespace/tag pair.
NS_PRECONDITION(aAttribute != nullptr, "null ptr");
if (! aAttribute)
return NS_ERROR_NULL_POINTER;
return GetResource(aNameSpaceID, nsDependentAtomString(aAttribute),
aResult);
}
nsresult
nsXULContentUtils::GetResource(int32_t aNameSpaceID, const nsAString& aAttribute, nsIRDFResource** aResult)
{
// construct a fully-qualified URI from the namespace/tag pair.
// XXX should we allow nodes with no namespace???
//NS_PRECONDITION(aNameSpaceID != kNameSpaceID_Unknown, "no namespace");
//if (aNameSpaceID == kNameSpaceID_Unknown)
// return NS_ERROR_UNEXPECTED;
nsresult rv;
char16_t buf[256];
nsFixedString uri(buf, ArrayLength(buf), 0);
if (aNameSpaceID != kNameSpaceID_Unknown && aNameSpaceID != kNameSpaceID_None) {
rv = nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, uri);
// XXX ignore failure; treat as "no namespace"
}
// XXX check to see if we need to insert a '/' or a '#'. Oy.
if (!uri.IsEmpty() && uri.Last() != '#' && uri.Last() != '/' && aAttribute.First() != '#')
uri.Append(char16_t('#'));
uri.Append(aAttribute);
rv = gRDF->GetUnicodeResource(uri, aResult);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to get resource");
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
nsresult
nsXULContentUtils::SetCommandUpdater(nsIDocument* aDocument, nsIContent* aElement)
{
// Deal with setting up a 'commandupdater'. Pulls the 'events' and
// 'targets' attributes off of aElement, and adds it to the
// document's command dispatcher.
NS_PRECONDITION(aDocument != nullptr, "null ptr");
if (! aDocument)
return NS_ERROR_NULL_POINTER;
NS_PRECONDITION(aElement != nullptr, "null ptr");
if (! aElement)
return NS_ERROR_NULL_POINTER;
nsresult rv;
nsCOMPtr<nsIDOMXULDocument> xuldoc = do_QueryInterface(aDocument);
NS_ASSERTION(xuldoc != nullptr, "not a xul document");
if (! xuldoc)
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIDOMXULCommandDispatcher> dispatcher;
rv = xuldoc->GetCommandDispatcher(getter_AddRefs(dispatcher));
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to get dispatcher");
if (NS_FAILED(rv)) return rv;
NS_ASSERTION(dispatcher != nullptr, "no dispatcher");
if (! dispatcher)
return NS_ERROR_UNEXPECTED;
nsAutoString events;
aElement->GetAttr(kNameSpaceID_None, nsGkAtoms::events, events);
if (events.IsEmpty())
events.Assign('*');
nsAutoString targets;
aElement->GetAttr(kNameSpaceID_None, nsGkAtoms::targets, targets);
if (targets.IsEmpty())
targets.Assign('*');
nsCOMPtr<nsIDOMElement> domelement = do_QueryInterface(aElement);
NS_ASSERTION(domelement != nullptr, "not a DOM element");
if (! domelement)
return NS_ERROR_UNEXPECTED;
rv = dispatcher->AddCommandUpdater(domelement, events, targets);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
void
nsXULContentUtils::LogTemplateError(const char* aStr)
{
nsAutoString message;
message.AssignLiteral("Error parsing template: ");
message.Append(NS_ConvertUTF8toUTF16(aStr).get());
nsCOMPtr<nsIConsoleService> cs = do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (cs) {
cs->LogStringMessage(message.get());
MOZ_LOG(gXULTemplateLog, LogLevel::Info, ("Error parsing template: %s", aStr));
}
}