Add m-esr52 at 52.6.0

1 files changed, 463 insertions, 0 deletions

diff --git a/gfx/thebes/gfxSVGGlyphs.cpp b/gfx/thebes/gfxSVGGlyphs.cpp
new file mode 100644
index 000000000..a7615eca8
--- /dev/null
+++ b/gfx/thebes/gfxSVGGlyphs.cpp
@@ -0,0 +1,463 @@
+/* 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 "gfxSVGGlyphs.h"
+
+#include "mozilla/SVGContextPaint.h"
+#include "nsError.h"
+#include "nsIDOMDocument.h"
+#include "nsString.h"
+#include "nsIDocument.h"
+#include "nsICategoryManager.h"
+#include "nsIDocumentLoaderFactory.h"
+#include "nsIContentViewer.h"
+#include "nsIStreamListener.h"
+#include "nsServiceManagerUtils.h"
+#include "nsIPresShell.h"
+#include "nsNetUtil.h"
+#include "nsNullPrincipal.h"
+#include "nsIInputStream.h"
+#include "nsStringStream.h"
+#include "nsStreamUtils.h"
+#include "nsIPrincipal.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/LoadInfo.h"
+#include "nsSVGUtils.h"
+#include "nsHostObjectProtocolHandler.h"
+#include "nsContentUtils.h"
+#include "gfxFont.h"
+#include "nsSMILAnimationController.h"
+#include "gfxContext.h"
+#include "harfbuzz/hb.h"
+#include "mozilla/dom/ImageTracker.h"
+
+#define SVG_CONTENT_TYPE NS_LITERAL_CSTRING("image/svg+xml")
+#define UTF8_CHARSET NS_LITERAL_CSTRING("utf-8")
+
+using namespace mozilla;
+
+typedef mozilla::dom::Element Element;
+
+/* static */ const Color SimpleTextContextPaint::sZero = Color();
+
+gfxSVGGlyphs::gfxSVGGlyphs(hb_blob_t *aSVGTable, gfxFontEntry *aFontEntry)
+    : mSVGData(aSVGTable)
+    , mFontEntry(aFontEntry)
+{
+    unsigned int length;
+    const char* svgData = hb_blob_get_data(mSVGData, &length);
+    mHeader = reinterpret_cast<const Header*>(svgData);
+    mDocIndex = nullptr;
+
+    if (sizeof(Header) <= length && uint16_t(mHeader->mVersion) == 0 &&
+        uint64_t(mHeader->mDocIndexOffset) + 2 <= length) {
+        const DocIndex* docIndex = reinterpret_cast<const DocIndex*>
+            (svgData + mHeader->mDocIndexOffset);
+        // Limit the number of documents to avoid overflow
+        if (uint64_t(mHeader->mDocIndexOffset) + 2 +
+                uint16_t(docIndex->mNumEntries) * sizeof(IndexEntry) <= length) {
+            mDocIndex = docIndex;
+        }
+    }
+}
+
+gfxSVGGlyphs::~gfxSVGGlyphs()
+{
+    hb_blob_destroy(mSVGData);
+}
+
+void
+gfxSVGGlyphs::DidRefresh()
+{
+    mFontEntry->NotifyGlyphsChanged();
+}
+
+/*
+ * Comparison operator for finding a range containing a given glyph ID. Simply
+ *   checks whether |key| is less (greater) than every element of |range|, in
+ *   which case return |key| < |range| (|key| > |range|). Otherwise |key| is in
+ *   |range|, in which case return equality.
+ * The total ordering here is guaranteed by
+ *   (1) the index ranges being disjoint; and
+ *   (2) the (sole) key always being a singleton, so intersection => containment
+ *       (note that this is wrong if we have more than one intersection or two 
+ *        sets intersecting of size > 1 -- so... don't do that)
+ */
+/* static */ int
+gfxSVGGlyphs::CompareIndexEntries(const void *aKey, const void *aEntry)
+{
+    const uint32_t key = *(uint32_t*)aKey;
+    const IndexEntry *entry = (const IndexEntry*)aEntry;
+
+    if (key < uint16_t(entry->mStartGlyph)) {
+        return -1;
+    }
+    if (key > uint16_t(entry->mEndGlyph)) {
+        return 1;
+    }
+    return 0;
+}
+
+gfxSVGGlyphsDocument *
+gfxSVGGlyphs::FindOrCreateGlyphsDocument(uint32_t aGlyphId)
+{
+    if (!mDocIndex) {
+        // Invalid table
+        return nullptr;
+    }
+
+    IndexEntry *entry = (IndexEntry*)bsearch(&aGlyphId, mDocIndex->mEntries,
+                                             uint16_t(mDocIndex->mNumEntries),
+                                             sizeof(IndexEntry),
+                                             CompareIndexEntries);
+    if (!entry) {
+        return nullptr;
+    }
+
+    gfxSVGGlyphsDocument *result = mGlyphDocs.Get(entry->mDocOffset);
+
+    if (!result) {
+        unsigned int length;
+        const uint8_t *data = (const uint8_t*)hb_blob_get_data(mSVGData, &length);
+        if (entry->mDocOffset > 0 &&
+            uint64_t(mHeader->mDocIndexOffset) + entry->mDocOffset + entry->mDocLength <= length) {
+            result = new gfxSVGGlyphsDocument(data + mHeader->mDocIndexOffset + entry->mDocOffset,
+                                              entry->mDocLength, this);
+            mGlyphDocs.Put(entry->mDocOffset, result);
+        }
+    }
+
+    return result;
+}
+
+nsresult
+gfxSVGGlyphsDocument::SetupPresentation()
+{
+    nsCOMPtr<nsICategoryManager> catMan = do_GetService(NS_CATEGORYMANAGER_CONTRACTID);
+    nsXPIDLCString contractId;
+    nsresult rv = catMan->GetCategoryEntry("Gecko-Content-Viewers", "image/svg+xml", getter_Copies(contractId));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory = do_GetService(contractId);
+    NS_ASSERTION(docLoaderFactory, "Couldn't get DocumentLoaderFactory");
+
+    nsCOMPtr<nsIContentViewer> viewer;
+    rv = docLoaderFactory->CreateInstanceForDocument(nullptr, mDocument, nullptr, getter_AddRefs(viewer));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = viewer->Init(nullptr, gfx::IntRect(0, 0, 1000, 1000));
+    if (NS_SUCCEEDED(rv)) {
+        rv = viewer->Open(nullptr, nullptr);
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    nsCOMPtr<nsIPresShell> presShell;
+    rv = viewer->GetPresShell(getter_AddRefs(presShell));
+    NS_ENSURE_SUCCESS(rv, rv);
+    nsPresContext* presContext = presShell->GetPresContext();
+    presContext->SetIsGlyph(true);
+
+    if (!presShell->DidInitialize()) {
+        nsRect rect = presContext->GetVisibleArea();
+        rv = presShell->Initialize(rect.width, rect.height);
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    mDocument->FlushPendingNotifications(Flush_Layout);
+
+    nsSMILAnimationController* controller = mDocument->GetAnimationController();
+    if (controller) {
+      controller->Resume(nsSMILTimeContainer::PAUSE_IMAGE);
+    }
+    mDocument->ImageTracker()->SetAnimatingState(true);
+
+    mViewer = viewer;
+    mPresShell = presShell;
+    mPresShell->AddPostRefreshObserver(this);
+
+    return NS_OK;
+}
+
+void
+gfxSVGGlyphsDocument::DidRefresh()
+{
+    mOwner->DidRefresh();
+}
+
+/**
+ * Walk the DOM tree to find all glyph elements and insert them into the lookup
+ * table
+ * @param aElem The element to search from
+ */
+void
+gfxSVGGlyphsDocument::FindGlyphElements(Element *aElem)
+{
+    for (nsIContent *child = aElem->GetLastChild(); child;
+            child = child->GetPreviousSibling()) {
+        if (!child->IsElement()) {
+            continue;
+        }
+        FindGlyphElements(child->AsElement());
+    }
+
+    InsertGlyphId(aElem);
+}
+
+/**
+ * If there exists an SVG glyph with the specified glyph id, render it and return true
+ * If no such glyph exists, or in the case of an error return false
+ * @param aContext The thebes aContext to draw to
+ * @param aGlyphId The glyph id
+ * @return true iff rendering succeeded
+ */
+bool
+gfxSVGGlyphs::RenderGlyph(gfxContext *aContext, uint32_t aGlyphId,
+                          SVGContextPaint* aContextPaint)
+{
+    gfxContextAutoSaveRestore aContextRestorer(aContext);
+
+    Element *glyph = mGlyphIdMap.Get(aGlyphId);
+    NS_ASSERTION(glyph, "No glyph element. Should check with HasSVGGlyph() first!");
+
+    AutoSetRestoreSVGContextPaint autoSetRestore(aContextPaint, glyph->OwnerDoc());
+
+    return nsSVGUtils::PaintSVGGlyph(glyph, aContext);
+}
+
+bool
+gfxSVGGlyphs::GetGlyphExtents(uint32_t aGlyphId, const gfxMatrix& aSVGToAppSpace,
+                              gfxRect *aResult)
+{
+    Element *glyph = mGlyphIdMap.Get(aGlyphId);
+    NS_ASSERTION(glyph, "No glyph element. Should check with HasSVGGlyph() first!");
+
+    return nsSVGUtils::GetSVGGlyphExtents(glyph, aSVGToAppSpace, aResult);
+}
+
+Element *
+gfxSVGGlyphs::GetGlyphElement(uint32_t aGlyphId)
+{
+    Element *elem;
+
+    if (!mGlyphIdMap.Get(aGlyphId, &elem)) {
+        elem = nullptr;
+        if (gfxSVGGlyphsDocument *set = FindOrCreateGlyphsDocument(aGlyphId)) {
+            elem = set->GetGlyphElement(aGlyphId);
+        }
+        mGlyphIdMap.Put(aGlyphId, elem);
+    }
+
+    return elem;
+}
+
+bool
+gfxSVGGlyphs::HasSVGGlyph(uint32_t aGlyphId)
+{
+    return !!GetGlyphElement(aGlyphId);
+}
+
+size_t
+gfxSVGGlyphs::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
+{
+    // We don't include the size of mSVGData here, because (depending on the
+    // font backend implementation) it will either wrap a block of data owned
+    // by the system (and potentially shared), or a table that's in our font
+    // table cache and therefore already counted.
+    size_t result = aMallocSizeOf(this)
+                    + mGlyphDocs.ShallowSizeOfExcludingThis(aMallocSizeOf)
+                    + mGlyphIdMap.ShallowSizeOfExcludingThis(aMallocSizeOf);
+    for (auto iter = mGlyphDocs.ConstIter(); !iter.Done(); iter.Next()) {
+        result += iter.Data()->SizeOfIncludingThis(aMallocSizeOf);
+    }
+    return result;
+}
+
+Element *
+gfxSVGGlyphsDocument::GetGlyphElement(uint32_t aGlyphId)
+{
+    return mGlyphIdMap.Get(aGlyphId);
+}
+
+gfxSVGGlyphsDocument::gfxSVGGlyphsDocument(const uint8_t *aBuffer,
+                                           uint32_t aBufLen,
+                                           gfxSVGGlyphs *aSVGGlyphs)
+    : mOwner(aSVGGlyphs)
+{
+    ParseDocument(aBuffer, aBufLen);
+    if (!mDocument) {
+        NS_WARNING("Could not parse SVG glyphs document");
+        return;
+    }
+
+    Element *root = mDocument->GetRootElement();
+    if (!root) {
+        NS_WARNING("Could not parse SVG glyphs document");
+        return;
+    }
+
+    nsresult rv = SetupPresentation();
+    if (NS_FAILED(rv)) {
+        NS_WARNING("Couldn't setup presentation for SVG glyphs document");
+        return;
+    }
+
+    FindGlyphElements(root);
+}
+
+gfxSVGGlyphsDocument::~gfxSVGGlyphsDocument()
+{
+    if (mDocument) {
+        mDocument->OnPageHide(false, nullptr);
+    }
+    if (mPresShell) {
+        mPresShell->RemovePostRefreshObserver(this);
+    }
+    if (mViewer) {
+        mViewer->Close(nullptr);
+        mViewer->Destroy();
+    }
+}
+
+static nsresult
+CreateBufferedStream(const uint8_t *aBuffer, uint32_t aBufLen,
+                     nsCOMPtr<nsIInputStream> &aResult)
+{
+    nsCOMPtr<nsIInputStream> stream;
+    nsresult rv = NS_NewByteInputStream(getter_AddRefs(stream),
+                                        reinterpret_cast<const char *>(aBuffer),
+                                        aBufLen, NS_ASSIGNMENT_DEPEND);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIInputStream> aBufferedStream;
+    if (!NS_InputStreamIsBuffered(stream)) {
+        rv = NS_NewBufferedInputStream(getter_AddRefs(aBufferedStream), stream, 4096);
+        NS_ENSURE_SUCCESS(rv, rv);
+        stream = aBufferedStream;
+    }
+
+    aResult = stream;
+
+    return NS_OK;
+}
+
+nsresult
+gfxSVGGlyphsDocument::ParseDocument(const uint8_t *aBuffer, uint32_t aBufLen)
+{
+    // Mostly pulled from nsDOMParser::ParseFromStream
+
+    nsCOMPtr<nsIInputStream> stream;
+    nsresult rv = CreateBufferedStream(aBuffer, aBufLen, stream);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIURI> uri;
+    nsHostObjectProtocolHandler::GenerateURIString(NS_LITERAL_CSTRING(FONTTABLEURI_SCHEME),
+                                                   nullptr,
+                                                   mSVGGlyphsDocumentURI);
+ 
+    rv = NS_NewURI(getter_AddRefs(uri), mSVGGlyphsDocumentURI);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIPrincipal> principal = nsNullPrincipal::Create();
+
+    nsCOMPtr<nsIDOMDocument> domDoc;
+    rv = NS_NewDOMDocument(getter_AddRefs(domDoc),
+                           EmptyString(),   // aNamespaceURI
+                           EmptyString(),   // aQualifiedName
+                           nullptr,          // aDoctype
+                           uri, uri, principal,
+                           false,           // aLoadedAsData
+                           nullptr,          // aEventObject
+                           DocumentFlavorSVG);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIDocument> document(do_QueryInterface(domDoc));
+    if (!document) {
+        return NS_ERROR_FAILURE;
+    }
+
+    nsCOMPtr<nsIChannel> channel;
+    rv = NS_NewInputStreamChannel(getter_AddRefs(channel),
+                                  uri,
+                                  nullptr, //aStream
+                                  principal,
+                                  nsILoadInfo::SEC_FORCE_INHERIT_PRINCIPAL,
+                                  nsIContentPolicy::TYPE_OTHER,
+                                  SVG_CONTENT_TYPE,
+                                  UTF8_CHARSET);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // Set this early because various decisions during page-load depend on it.
+    document->SetIsBeingUsedAsImage();
+    document->SetReadyStateInternal(nsIDocument::READYSTATE_UNINITIALIZED);
+
+    nsCOMPtr<nsIStreamListener> listener;
+    rv = document->StartDocumentLoad("external-resource", channel,
+                                     nullptr,    // aLoadGroup
+                                     nullptr,    // aContainer
+                                     getter_AddRefs(listener),
+                                     true /* aReset */);
+    if (NS_FAILED(rv) || !listener) {
+        return NS_ERROR_FAILURE;
+    }
+
+    rv = listener->OnStartRequest(channel, nullptr /* aContext */);
+    if (NS_FAILED(rv)) {
+        channel->Cancel(rv);
+    }
+
+    nsresult status;
+    channel->GetStatus(&status);
+    if (NS_SUCCEEDED(rv) && NS_SUCCEEDED(status)) {
+        rv = listener->OnDataAvailable(channel, nullptr /* aContext */, stream, 0, aBufLen);
+        if (NS_FAILED(rv)) {
+            channel->Cancel(rv);
+        }
+        channel->GetStatus(&status);
+    }
+
+    rv = listener->OnStopRequest(channel, nullptr /* aContext */, status);
+    NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
+
+    document.swap(mDocument);
+
+    return NS_OK;
+}
+
+void
+gfxSVGGlyphsDocument::InsertGlyphId(Element *aGlyphElement)
+{
+    nsAutoString glyphIdStr;
+    static const uint32_t glyphPrefixLength = 5;
+    // The maximum glyph ID is 65535 so the maximum length of the numeric part
+    // is 5.
+    if (!aGlyphElement->GetAttr(kNameSpaceID_None, nsGkAtoms::id, glyphIdStr) ||
+        !StringBeginsWith(glyphIdStr, NS_LITERAL_STRING("glyph")) ||
+        glyphIdStr.Length() > glyphPrefixLength + 5) {
+        return;
+    }
+
+    uint32_t id = 0;
+    for (uint32_t i = glyphPrefixLength; i < glyphIdStr.Length(); ++i) {
+      char16_t ch = glyphIdStr.CharAt(i);
+      if (ch < '0' || ch > '9') {
+        return;
+      }
+      if (ch == '0' && i == glyphPrefixLength) {
+        return;
+      }
+      id = id * 10 + (ch - '0');
+    }
+
+    mGlyphIdMap.Put(id, aGlyphElement);
+}
+
+size_t
+gfxSVGGlyphsDocument::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
+{
+    return aMallocSizeOf(this)
+           + mGlyphIdMap.ShallowSizeOfExcludingThis(aMallocSizeOf)
+           + mSVGGlyphsDocumentURI.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
+
+}