зеркало из https://github.com/mozilla/gecko-dev.git
282 строки
9.8 KiB
C++
282 строки
9.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "InspectorFontFace.h"
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#include "gfxPlatformFontList.h"
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#include "gfxTextRun.h"
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#include "gfxUserFontSet.h"
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#include "nsFontFaceLoader.h"
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#include "mozilla/gfx/2D.h"
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#include "brotli/decode.h"
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#include "zlib.h"
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#include "mozilla/dom/CSSFontFaceRule.h"
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#include "mozilla/dom/FontFaceSet.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/Unused.h"
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namespace mozilla {
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namespace dom {
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InspectorFontFace::InspectorFontFace(gfxFontEntry* aFontEntry,
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gfxFontGroup* aFontGroup,
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FontMatchType aMatchType)
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: mFontEntry(aFontEntry), mFontGroup(aFontGroup), mMatchType(aMatchType) {
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MOZ_COUNT_CTOR(InspectorFontFace);
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}
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InspectorFontFace::~InspectorFontFace() { MOZ_COUNT_DTOR(InspectorFontFace); }
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bool InspectorFontFace::FromFontGroup() {
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return bool(mMatchType.kind & FontMatchType::Kind::kFontGroup);
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}
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bool InspectorFontFace::FromLanguagePrefs() {
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return bool(mMatchType.kind & FontMatchType::Kind::kPrefsFallback);
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}
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bool InspectorFontFace::FromSystemFallback() {
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return bool(mMatchType.kind & FontMatchType::Kind::kSystemFallback);
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}
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void InspectorFontFace::GetName(nsAString& aName) {
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if (mFontEntry->IsUserFont() && !mFontEntry->IsLocalUserFont()) {
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NS_ASSERTION(mFontEntry->mUserFontData, "missing userFontData");
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aName.Append(NS_ConvertUTF8toUTF16(mFontEntry->mUserFontData->mRealName));
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} else {
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aName.Append(NS_ConvertUTF8toUTF16(mFontEntry->RealFaceName()));
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}
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}
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void InspectorFontFace::GetCSSFamilyName(nsAString& aCSSFamilyName) {
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aCSSFamilyName.Append(NS_ConvertUTF8toUTF16(mFontEntry->FamilyName()));
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}
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void InspectorFontFace::GetCSSGeneric(nsAString& aName) {
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if (mMatchType.generic != StyleGenericFontFamily::None) {
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aName.AssignASCII(gfxPlatformFontList::GetGenericName(mMatchType.generic));
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} else {
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aName.Truncate(0);
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}
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}
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CSSFontFaceRule* InspectorFontFace::GetRule() {
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if (!mRule) {
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// check whether this font entry is associated with an @font-face rule
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// in the relevant font group's user font set
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StyleLockedFontFaceRule* rule = nullptr;
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if (mFontEntry->IsUserFont()) {
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auto* fontFaceSet =
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static_cast<FontFaceSetImpl*>(mFontGroup->GetUserFontSet());
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if (fontFaceSet) {
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rule = fontFaceSet->FindRuleForEntry(mFontEntry);
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}
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}
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if (rule) {
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// XXX It would be better if we can share this with CSSOM tree,
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// but that may require us to create another map, which is not
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// great either. As far as they would use the same backend, and
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// we don't really support mutating @font-face rule via CSSOM,
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// it's probably fine for now.
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uint32_t line, column;
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Servo_FontFaceRule_GetSourceLocation(rule, &line, &column);
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mRule =
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new CSSFontFaceRule(do_AddRef(rule), nullptr, nullptr, line, column);
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}
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}
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return mRule;
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}
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int32_t InspectorFontFace::SrcIndex() {
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if (mFontEntry->IsUserFont()) {
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NS_ASSERTION(mFontEntry->mUserFontData, "missing userFontData");
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return mFontEntry->mUserFontData->mSrcIndex;
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}
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return -1;
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}
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void InspectorFontFace::GetURI(nsAString& aURI) {
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aURI.Truncate();
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if (mFontEntry->IsUserFont() && !mFontEntry->IsLocalUserFont()) {
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NS_ASSERTION(mFontEntry->mUserFontData, "missing userFontData");
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if (mFontEntry->mUserFontData->mURI) {
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nsAutoCString spec;
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mFontEntry->mUserFontData->mURI->GetSpec(spec);
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AppendUTF8toUTF16(spec, aURI);
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}
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}
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}
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void InspectorFontFace::GetLocalName(nsAString& aLocalName) {
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aLocalName.Truncate();
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if (mFontEntry->IsLocalUserFont()) {
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NS_ASSERTION(mFontEntry->mUserFontData, "missing userFontData");
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aLocalName.Append(
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NS_ConvertUTF8toUTF16(mFontEntry->mUserFontData->mLocalName));
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}
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}
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void InspectorFontFace::GetFormat(nsAString& aFormat) {
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aFormat.Truncate();
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if (mFontEntry->IsUserFont() && !mFontEntry->IsLocalUserFont()) {
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NS_ASSERTION(mFontEntry->mUserFontData, "missing userFontData");
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switch (mFontEntry->mUserFontData->mFormatHint) {
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case StyleFontFaceSourceFormatKeyword::None:
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break;
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case StyleFontFaceSourceFormatKeyword::Collection:
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aFormat.AssignLiteral("collection");
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break;
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case StyleFontFaceSourceFormatKeyword::Opentype:
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aFormat.AssignLiteral("opentype");
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break;
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case StyleFontFaceSourceFormatKeyword::Truetype:
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aFormat.AssignLiteral("truetype");
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break;
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case StyleFontFaceSourceFormatKeyword::EmbeddedOpentype:
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aFormat.AssignLiteral("embedded-opentype");
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break;
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case StyleFontFaceSourceFormatKeyword::Svg:
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aFormat.AssignLiteral("svg");
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break;
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case StyleFontFaceSourceFormatKeyword::Woff:
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aFormat.AssignLiteral("woff");
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break;
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case StyleFontFaceSourceFormatKeyword::Woff2:
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aFormat.AssignLiteral("woff2");
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break;
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case StyleFontFaceSourceFormatKeyword::Unknown:
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aFormat.AssignLiteral("unknown!");
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break;
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}
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}
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}
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void InspectorFontFace::GetMetadata(nsAString& aMetadata) {
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aMetadata.Truncate();
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if (mFontEntry->IsUserFont() && !mFontEntry->IsLocalUserFont()) {
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NS_ASSERTION(mFontEntry->mUserFontData, "missing userFontData");
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const gfxUserFontData* userFontData = mFontEntry->mUserFontData.get();
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if (userFontData->mMetadata.Length() && userFontData->mMetaOrigLen) {
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nsAutoCString str;
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str.SetLength(userFontData->mMetaOrigLen);
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if (str.Length() == userFontData->mMetaOrigLen) {
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switch (userFontData->mCompression) {
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case gfxUserFontData::kZlibCompression: {
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uLongf destLen = userFontData->mMetaOrigLen;
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if (uncompress((Bytef*)(str.BeginWriting()), &destLen,
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(const Bytef*)(userFontData->mMetadata.Elements()),
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userFontData->mMetadata.Length()) == Z_OK &&
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destLen == userFontData->mMetaOrigLen) {
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AppendUTF8toUTF16(str, aMetadata);
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}
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} break;
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case gfxUserFontData::kBrotliCompression: {
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size_t decodedSize = userFontData->mMetaOrigLen;
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if (BrotliDecoderDecompress(userFontData->mMetadata.Length(),
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userFontData->mMetadata.Elements(),
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&decodedSize,
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(uint8_t*)str.BeginWriting()) == 1 &&
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decodedSize == userFontData->mMetaOrigLen) {
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AppendUTF8toUTF16(str, aMetadata);
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}
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} break;
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}
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}
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}
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}
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}
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// Append an OpenType tag to a string as a 4-ASCII-character code.
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static void AppendTagAsASCII(nsAString& aString, uint32_t aTag) {
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aString.AppendPrintf("%c%c%c%c", (aTag >> 24) & 0xff, (aTag >> 16) & 0xff,
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(aTag >> 8) & 0xff, aTag & 0xff);
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}
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void InspectorFontFace::GetVariationAxes(
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nsTArray<InspectorVariationAxis>& aResult, ErrorResult& aRV) {
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if (!mFontEntry->HasVariations()) {
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return;
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}
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AutoTArray<gfxFontVariationAxis, 4> axes;
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mFontEntry->GetVariationAxes(axes);
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MOZ_ASSERT(!axes.IsEmpty());
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if (!aResult.SetCapacity(axes.Length(), mozilla::fallible)) {
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aRV.Throw(NS_ERROR_OUT_OF_MEMORY);
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return;
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}
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for (auto a : axes) {
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InspectorVariationAxis& axis = *aResult.AppendElement();
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AppendTagAsASCII(axis.mTag, a.mTag);
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axis.mName.Append(NS_ConvertUTF8toUTF16(a.mName));
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axis.mMinValue = a.mMinValue;
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axis.mMaxValue = a.mMaxValue;
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axis.mDefaultValue = a.mDefaultValue;
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}
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}
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void InspectorFontFace::GetVariationInstances(
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nsTArray<InspectorVariationInstance>& aResult, ErrorResult& aRV) {
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if (!mFontEntry->HasVariations()) {
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return;
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}
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AutoTArray<gfxFontVariationInstance, 16> instances;
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mFontEntry->GetVariationInstances(instances);
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if (!aResult.SetCapacity(instances.Length(), mozilla::fallible)) {
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aRV.Throw(NS_ERROR_OUT_OF_MEMORY);
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return;
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}
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for (const auto& i : instances) {
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InspectorVariationInstance& inst = *aResult.AppendElement();
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inst.mName.Append(NS_ConvertUTF8toUTF16(i.mName));
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// inst.mValues is a webidl sequence<>, which is a fallible array,
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// so we are required to use fallible SetCapacity and AppendElement calls,
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// and check the result. In practice we don't expect failure here; the
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// list of values cannot get huge because of limits in the font format.
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if (!inst.mValues.SetCapacity(i.mValues.Length(), mozilla::fallible)) {
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aRV.Throw(NS_ERROR_OUT_OF_MEMORY);
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return;
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}
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for (const auto& v : i.mValues) {
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InspectorVariationValue value;
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AppendTagAsASCII(value.mAxis, v.mAxis);
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value.mValue = v.mValue;
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// This won't fail, because of SetCapacity above.
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Unused << inst.mValues.AppendElement(value, mozilla::fallible);
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}
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}
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}
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void InspectorFontFace::GetFeatures(nsTArray<InspectorFontFeature>& aResult,
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ErrorResult& aRV) {
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AutoTArray<gfxFontFeatureInfo, 64> features;
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mFontEntry->GetFeatureInfo(features);
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if (features.IsEmpty()) {
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return;
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}
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if (!aResult.SetCapacity(features.Length(), mozilla::fallible)) {
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aRV.Throw(NS_ERROR_OUT_OF_MEMORY);
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return;
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}
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for (auto& f : features) {
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InspectorFontFeature& feat = *aResult.AppendElement();
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AppendTagAsASCII(feat.mTag, f.mTag);
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AppendTagAsASCII(feat.mScript, f.mScript);
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AppendTagAsASCII(feat.mLanguageSystem, f.mLangSys);
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}
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}
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void InspectorFontFace::GetRanges(nsTArray<RefPtr<nsRange>>& aResult) {
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aResult = mRanges.Clone();
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}
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void InspectorFontFace::AddRange(nsRange* aRange) {
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mRanges.AppendElement(aRange);
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}
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} // namespace dom
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} // namespace mozilla
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