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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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 <sal/config.h>
#include <cassert>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/ucb/IllegalIdentifierException.hpp>
#include <com/sun/star/ucb/XContentProvider.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <com/sun/star/uri/UriReferenceFactory.hpp>
#include <cppuhelper/compbase.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <osl/mutex.hxx>
#include <rtl/uri.hxx>
#include <rtl/ustrbuf.hxx>
#include <vcl/ImageTree.hxx>
#include <vcl/svapp.hxx>
#include <ucbhelper/content.hxx>
// A LO-private ("implementation detail") UCP used to access images from help
// content, with theme fallback and localization support as provided by VCL's
// ImageTree.
//
// The URL scheme is
//
// "vnd.libreoffice.image://"<theme><path>["?lang="<language-tag>]
namespace {
class Provider final:
private osl::Mutex,
public cppu::WeakComponentImplHelper<
css::lang::XServiceInfo, css::ucb::XContentProvider>
{
public:
explicit Provider(
css::uno::Reference<css::uno::XComponentContext> const & context):
WeakComponentImplHelper(*static_cast<Mutex *>(this)), context_(context)
{}
private:
OUString SAL_CALL getImplementationName() override
{ return "com.sun.star.comp.ucb.ImageContentProvider"; }
sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override
{ return cppu::supportsService(this, ServiceName); }
css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override
{
return css::uno::Sequence<OUString>{
"com.sun.star.ucb.ImageContentProvider"};
}
css::uno::Reference<css::ucb::XContent> SAL_CALL queryContent(
css::uno::Reference<css::ucb::XContentIdentifier> const & Identifier)
override
{
css::uno::Reference<css::uno::XComponentContext> context;
{
osl::MutexGuard g(*this);
context = context_;
}
if (!context.is()) {
throw css::lang::DisposedException();
}
auto url(Identifier->getContentIdentifier());
auto uri(css::uri::UriReferenceFactory::create(context)->parse(url));
if (!(uri.is()
&& uri->getScheme().equalsIgnoreAsciiCase(
"vnd.libreoffice.image")))
{
throw css::ucb::IllegalIdentifierException(url);
}
auto auth(
rtl::Uri::decode(
uri->getAuthority(), rtl_UriDecodeStrict,
RTL_TEXTENCODING_UTF8));
if (auth.isEmpty()) {
throw css::ucb::IllegalIdentifierException(url);
}
auto path(uri->getPath());
if (path.isEmpty()) {
throw css::ucb::IllegalIdentifierException(url);
}
OUStringBuffer buf;
assert(path[0] == '/');
for (sal_Int32 i = 1;;) {
auto j = path.indexOf('/', i);
if (j == -1) {
j = path.getLength();
}
auto seg(
rtl::Uri::decode(
path.copy(i, j - i), rtl_UriDecodeStrict,
RTL_TEXTENCODING_UTF8));
if (seg.isEmpty()) {
throw css::ucb::IllegalIdentifierException(url);
}
if (i != 1) {
buf.append('/');
}
buf.append(seg);
if (j == path.getLength()) {
break;
}
i = j + 1;
}
auto decPath(buf.makeStringAndClear());
OUString lang;
if (uri->hasQuery()) {
if (!uri->getQuery().startsWith("lang=", &lang)) {
throw css::ucb::IllegalIdentifierException(url);
}
lang = rtl::Uri::decode(
lang, rtl_UriDecodeStrict, RTL_TEXTENCODING_UTF8);
if (lang.isEmpty()) {
throw css::ucb::IllegalIdentifierException(url);
}
}
OUString newUrl;
{
SolarMutexGuard g;
newUrl = ImageTree::get().getImageUrl(decPath, auth, lang);
}
ucbhelper::Content content;
return
ucbhelper::Content::create(
newUrl, css::uno::Reference<css::ucb::XCommandEnvironment>(),
context, content)
? content.get() : css::uno::Reference<css::ucb::XContent>();
}
sal_Int32 SAL_CALL compareContentIds(
css::uno::Reference<css::ucb::XContentIdentifier> const & Id1,
css::uno::Reference<css::ucb::XContentIdentifier> const & Id2) override
{
return Id1->getContentIdentifier().compareTo(
Id2->getContentIdentifier());
}
void SAL_CALL disposing() override {
context_.clear();
}
css::uno::Reference<css::uno::XComponentContext> context_;
};
}
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
com_sun_star_comp_ucb_ImageContentProvider_get_implementation(
css::uno::XComponentContext * context,
css::uno::Sequence<css::uno::Any> const &)
{
return cppu::acquire(new Provider(context));
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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