parser/html/nsHtml5SpeculativeLoad.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "nsHtml5SpeculativeLoad.h"
   6 #include "mozilla/Encoding.h"
   7 #include "nsHtml5TreeOpExecutor.h"
   8
   9 using namespace mozilla;
  10
  11 nsHtml5SpeculativeLoad::nsHtml5SpeculativeLoad()
  12     : mOpCode(eSpeculativeLoadUninitialized),
  13       mIsAsync(false),
  14       mIsDefer(false),
  15       mIsLinkPreload(false),
  16       mIsError(false),
  17       mEncoding(nullptr) {
  18   MOZ_COUNT_CTOR(nsHtml5SpeculativeLoad);
  19   new (&mCharsetOrSrcset) nsString;
  20 }
  21
  22 nsHtml5SpeculativeLoad::~nsHtml5SpeculativeLoad() {
  23   MOZ_COUNT_DTOR(nsHtml5SpeculativeLoad);
  24   NS_ASSERTION(mOpCode != eSpeculativeLoadUninitialized,
  25                "Uninitialized speculative load.");
  26   if (!(mOpCode == eSpeculativeLoadSetDocumentCharset ||
  27         mOpCode == eSpeculativeLoadMaybeComplainAboutCharset)) {
  28     mCharsetOrSrcset.~nsString();
  29   }
  30 }
  31
  32 void nsHtml5SpeculativeLoad::Perform(nsHtml5TreeOpExecutor* aExecutor) {
  33   switch (mOpCode) {
  34     case eSpeculativeLoadBase:
  35       aExecutor->SetSpeculationBase(mUrlOrSizes);
  36       break;
  37     case eSpeculativeLoadCSP:
  38       aExecutor->AddSpeculationCSP(
  39           mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity);
  40       break;
  41     case eSpeculativeLoadMetaReferrer:
  42       aExecutor->UpdateReferrerInfoFromMeta(mReferrerPolicyOrIntegrity);
  43       break;
  44     case eSpeculativeLoadImage:
  45       aExecutor->PreloadImage(
  46           mUrlOrSizes, mCrossOrigin, mMedia, mCharsetOrSrcset,
  47           mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity,
  48           mReferrerPolicyOrIntegrity, mIsLinkPreload, mFetchPriority);
  49       break;
  50     case eSpeculativeLoadOpenPicture:
  51       aExecutor->PreloadOpenPicture();
  52       break;
  53     case eSpeculativeLoadEndPicture:
  54       aExecutor->PreloadEndPicture();
  55       break;
  56     case eSpeculativeLoadPictureSource:
  57       aExecutor->PreloadPictureSource(
  58           mCharsetOrSrcset, mUrlOrSizes,
  59           mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity,
  60           mMedia);
  61       break;
  62     case eSpeculativeLoadScript:
  63       aExecutor->PreloadScript(
  64           mUrlOrSizes, mCharsetOrSrcset,
  65           mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity,
  66           mCrossOrigin, mMedia, mNonce, mFetchPriority,
  67           mReferrerPolicyOrIntegrity, mScriptReferrerPolicy, false, mIsAsync,
  68           mIsDefer, mIsLinkPreload);
  69       break;
  70     case eSpeculativeLoadScriptFromHead:
  71       aExecutor->PreloadScript(
  72           mUrlOrSizes, mCharsetOrSrcset,
  73           mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity,
  74           mCrossOrigin, mMedia, mNonce, mFetchPriority,
  75           mReferrerPolicyOrIntegrity, mScriptReferrerPolicy, true, mIsAsync,
  76           mIsDefer, mIsLinkPreload);
  77       break;
  78     case eSpeculativeLoadStyle:
  79       aExecutor->PreloadStyle(
  80           mUrlOrSizes, mCharsetOrSrcset, mCrossOrigin, mMedia,
  81           mReferrerPolicyOrIntegrity, mNonce,
  82           mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity,
  83           mIsLinkPreload, mFetchPriority);
  84       break;
  85     case eSpeculativeLoadManifest:
  86       // TODO: remove this
  87       break;
  88     case eSpeculativeLoadSetDocumentCharset: {
  89       MOZ_ASSERT(mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity
  90                          .Length() == 1,
  91                  "Unexpected charset source string");
  92       nsCharsetSource enumSource =
  93           (nsCharsetSource)
  94               mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity
  95                   .First();
  96       aExecutor->SetDocumentCharsetAndSource(WrapNotNull(mEncoding),
  97                                              enumSource);
  98       if (mCommitEncodingSpeculation) {
  99         aExecutor->CommitToInternalEncoding();
 100       }
 101     } break;
 102     case eSpeculativeLoadSetDocumentMode: {
 103       NS_ASSERTION(mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity
 104                            .Length() == 1,
 105                    "Unexpected document mode string");
 106       nsHtml5DocumentMode mode =
 107           (nsHtml5DocumentMode)
 108               mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity
 109                   .First();
 110       aExecutor->SetDocumentMode(mode);
 111     } break;
 112     case eSpeculativeLoadPreconnect:
 113       aExecutor->Preconnect(mUrlOrSizes, mCrossOrigin);
 114       break;
 115     case eSpeculativeLoadFont:
 116       aExecutor->PreloadFont(mUrlOrSizes, mCrossOrigin, mMedia,
 117                              mReferrerPolicyOrIntegrity, mFetchPriority);
 118       break;
 119     case eSpeculativeLoadFetch:
 120       aExecutor->PreloadFetch(mUrlOrSizes, mCrossOrigin, mMedia,
 121                               mReferrerPolicyOrIntegrity, mFetchPriority);
 122       break;
 123     case eSpeculativeLoadMaybeComplainAboutCharset: {
 124       MOZ_ASSERT(mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity
 125                          .Length() == 2,
 126                  "Unexpected line number string");
 127       uint32_t high =
 128           (uint32_t)
 129               mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity
 130                   .CharAt(0);
 131       uint32_t low =
 132           (uint32_t)
 133               mTypeOrCharsetSourceOrDocumentModeOrMetaCSPOrSizesOrIntegrity
 134                   .CharAt(1);
 135       uint32_t line = (high << 16) | low;
 136       aExecutor->MaybeComplainAboutCharset(mMsgId, mIsError, (int32_t)line);
 137     } break;
 138     default:
 139       MOZ_ASSERT_UNREACHABLE("Bogus speculative load.");
 140       break;
 141   }
 142 }