зеркало из https://github.com/mozilla/gecko-dev.git
246 строки
7.3 KiB
C++
246 строки
7.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Foundation code.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* John Daggett <jdaggett@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* code for loading in @font-face defined font data */
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#ifdef MOZ_LOGGING
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#define FORCE_PR_LOG /* Allow logging in the release build */
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#endif /* MOZ_LOGGING */
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#include "prlog.h"
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#include "nsFontFaceLoader.h"
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#include "nsIFile.h"
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#include "nsILocalFile.h"
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#include "nsIStreamListener.h"
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#include "nsNetUtil.h"
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#include "nsIChannelEventSink.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsContentUtils.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIDocument.h"
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#include "nsIFrame.h"
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#include "nsIPrincipal.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsDirectoryServiceUtils.h"
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#include "nsDirectoryServiceDefs.h"
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#ifdef PR_LOGGING
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static PRLogModuleInfo *gFontDownloaderLog = PR_NewLogModule("fontdownloader");
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#endif /* PR_LOGGING */
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#define LOG(args) PR_LOG(gFontDownloaderLog, PR_LOG_DEBUG, args)
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#define LOG_ENABLED() PR_LOG_TEST(gFontDownloaderLog, PR_LOG_DEBUG)
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#define ENFORCE_SAME_SITE_ORIGIN "gfx.downloadable_fonts.enforce_same_site_origin"
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static PRBool gEnforceSameSiteOrigin = PR_TRUE;
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static PRBool
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CheckMayLoad(nsIDocument* aDoc, nsIURI* aURI)
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{
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// allow this to be disabled via a pref
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static PRBool init = PR_FALSE;
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if (!init) {
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init = PR_TRUE;
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nsContentUtils::AddBoolPrefVarCache(ENFORCE_SAME_SITE_ORIGIN, &gEnforceSameSiteOrigin);
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}
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if (!gEnforceSameSiteOrigin)
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return PR_TRUE;
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if (!aDoc)
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return PR_FALSE;
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nsresult rv = aDoc->NodePrincipal()->CheckMayLoad(aURI, PR_TRUE);
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return NS_SUCCEEDED(rv);
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}
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nsFontFaceLoader::nsFontFaceLoader(gfxFontEntry *aFontToLoad, nsIURI *aFontURI,
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gfxUserFontSet::LoaderContext *aContext)
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: mFontEntry(aFontToLoad), mFontURI(aFontURI), mLoaderContext(aContext)
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{
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}
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nsFontFaceLoader::~nsFontFaceLoader()
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{
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}
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NS_IMPL_ISUPPORTS1(nsFontFaceLoader, nsIDownloadObserver)
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static nsresult
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MakeTempFileName(nsIFile** tempFile)
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{
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nsresult rv;
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rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, tempFile);
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NS_ENSURE_SUCCESS(rv, rv);
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// xxx - need something a little less lame here...
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static PRUint16 count = 0;
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PRTime now = PR_Now();
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PRUint32 current = (PRUint32) now;
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++count;
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char buf[256];
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sprintf(buf, "mozfont_%8.8x%4.4x.ttf", current, count);
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rv = (*tempFile)->AppendNative(nsDependentCString(buf));
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NS_ENSURE_SUCCESS(rv, rv);
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return (*tempFile)->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0600);
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}
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// initiate the load
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nsresult
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nsFontFaceLoader::Init()
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{
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#ifdef PR_LOGGING
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if (LOG_ENABLED()) {
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nsCAutoString fontURI;
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mFontURI->GetSpec(fontURI);
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LOG(("fontdownloader (%p) download start - font uri: (%s)\n",
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this, fontURI.get()));
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}
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#endif
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nsresult rv;
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nsCOMPtr<nsIFile> tempFile;
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rv = MakeTempFileName(getter_AddRefs(tempFile));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = NS_NewDownloader(getter_AddRefs(mDownloader), this, tempFile);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIInterfaceRequestor> sameOriginChecker
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= nsContentUtils::GetSameOriginChecker();
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rv = NS_OpenURI(mDownloader, nsnull, mFontURI, nsnull, nsnull,
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sameOriginChecker);
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsFontFaceLoader::OnDownloadComplete(nsIDownloader *aDownloader,
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nsIRequest *aRequest,
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nsISupports *aContext,
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nsresult aStatus,
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nsIFile *aFile)
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{
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#ifdef PR_LOGGING
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if (LOG_ENABLED()) {
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nsCAutoString fontURI;
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mFontURI->GetSpec(fontURI);
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if (NS_SUCCEEDED(aStatus)) {
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LOG(("fontdownloader (%p) download completed - font uri: (%s)\n",
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this, fontURI.get()));
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} else {
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LOG(("fontdownloader (%p) download failed - font uri: (%s) error: %8.8x\n",
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this, fontURI.get(), aStatus));
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}
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}
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#endif
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PRBool fontUpdate;
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if (NS_SUCCEEDED(aStatus) && aFile) {
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// font data download succeeded, try to load the font
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mFaceData.mFormatFlags = 0;
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mFaceData.mFontFile = aFile;
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mFaceData.mDownloader = aDownloader;
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}
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// whether an error occurred or not, notify the user font set of the completion
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fontUpdate = mLoaderContext->mUserFontSet->OnLoadComplete(mFontEntry,
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mFaceData,
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aStatus);
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// when new font loaded, need to reflow
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if (fontUpdate) {
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nsFontFaceLoaderContext *loaderCtx
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= static_cast<nsFontFaceLoaderContext*> (mLoaderContext);
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nsIPresShell *ps = loaderCtx->mPresContext->PresShell();
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if (ps) {
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// reflow async so that reflows coalesce
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ps->StyleChangeReflow();
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LOG(("fontdownloader (%p) reflow\n", this));
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}
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}
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return NS_OK;
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}
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PRBool
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nsFontFaceLoader::CreateHandler(gfxFontEntry *aFontToLoad, nsIURI *aFontURI,
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gfxUserFontSet::LoaderContext *aContext)
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{
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// check same-site origin
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nsFontFaceLoaderContext *loaderCtx
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= static_cast<nsFontFaceLoaderContext*> (aContext);
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nsIPresShell *ps = loaderCtx->mPresContext->PresShell();
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if (!ps)
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return PR_FALSE;
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if (!CheckMayLoad(ps->GetDocument(), aFontURI))
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return PR_FALSE;
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nsRefPtr<nsFontFaceLoader> loader = new nsFontFaceLoader(aFontToLoad,
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aFontURI,
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aContext);
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if (!loader)
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return PR_FALSE;
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nsresult rv = loader->Init();
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return NS_SUCCEEDED(rv);
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}
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