1 files changed, 198 insertions, 0 deletions
diff --git a/xpcom/build/Omnijar.cpp b/xpcom/build/Omnijar.cpp
new file mode 100644
index 0000000000..2c6e3eb478
--- /dev/null
+++ b/xpcom/build/Omnijar.cpp
@@ -0,0 +1,198 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "Omnijar.h"
+
+#include "nsDirectoryService.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsIFile.h"
+#include "nsZipArchive.h"
+#include "nsNetUtil.h"
+
+namespace mozilla {
+
+StaticRefPtr<nsIFile> Omnijar::sPath[2];
+StaticRefPtr<nsZipArchive> Omnijar::sReader[2];
+StaticRefPtr<nsZipArchive> Omnijar::sOuterReader[2];
+bool Omnijar::sInitialized = false;
+bool Omnijar::sIsUnified = false;
+
+static const char* sProp[2] = {NS_GRE_DIR, NS_XPCOM_CURRENT_PROCESS_DIR};
+
+#define SPROP(Type) ((Type == mozilla::Omnijar::GRE) ? sProp[GRE] : sProp[APP])
+
+void Omnijar::CleanUpOne(Type aType) {
+  if (sReader[aType]) {
+    sReader[aType] = nullptr;
+  }
+  if (sOuterReader[aType]) {
+    sOuterReader[aType] = nullptr;
+  }
+  sPath[aType] = nullptr;
+}
+
+void Omnijar::InitOne(nsIFile* aPath, Type aType) {
+  nsCOMPtr<nsIFile> file;
+  if (aPath) {
+    file = aPath;
+  } else {
+    nsCOMPtr<nsIFile> dir;
+    nsDirectoryService::gService->Get(SPROP(aType), NS_GET_IID(nsIFile),
+                                      getter_AddRefs(dir));
+    constexpr auto kOmnijarName = nsLiteralCString{MOZ_STRINGIFY(OMNIJAR_NAME)};
+    if (NS_FAILED(dir->Clone(getter_AddRefs(file))) ||
+        NS_FAILED(file->AppendNative(kOmnijarName))) {
+      return;
+    }
+  }
+  bool isFile;
+  if (NS_FAILED(file->IsFile(&isFile)) || !isFile) {
+    // If we're not using an omni.jar for GRE, and we don't have an
+    // omni.jar for APP, check if both directories are the same.
+    if ((aType == APP) && (!sPath[GRE])) {
+      nsCOMPtr<nsIFile> greDir, appDir;
+      bool equals;
+      nsDirectoryService::gService->Get(sProp[GRE], NS_GET_IID(nsIFile),
+                                        getter_AddRefs(greDir));
+      nsDirectoryService::gService->Get(sProp[APP], NS_GET_IID(nsIFile),
+                                        getter_AddRefs(appDir));
+      if (NS_SUCCEEDED(greDir->Equals(appDir, &equals)) && equals) {
+        sIsUnified = true;
+      }
+    }
+    return;
+  }
+
+  bool equals;
+  if ((aType == APP) && (sPath[GRE]) &&
+      NS_SUCCEEDED(sPath[GRE]->Equals(file, &equals)) && equals) {
+    // If we're using omni.jar on both GRE and APP and their path
+    // is the same, we're in the unified case.
+    sIsUnified = true;
+    return;
+  }
+
+  RefPtr<nsZipArchive> zipReader = nsZipArchive::OpenArchive(file);
+  if (!zipReader) {
+    return;
+  }
+
+  RefPtr<nsZipArchive> outerReader;
+  RefPtr<nsZipHandle> handle;
+  if (NS_SUCCEEDED(nsZipHandle::Init(zipReader, MOZ_STRINGIFY(OMNIJAR_NAME),
+                                     getter_AddRefs(handle)))) {
+    outerReader = zipReader;
+    zipReader = nsZipArchive::OpenArchive(handle);
+    if (!zipReader) {
+      return;
+    }
+  }
+
+  CleanUpOne(aType);
+  sReader[aType] = zipReader;
+  sOuterReader[aType] = outerReader;
+  sPath[aType] = file;
+}
+
+void Omnijar::Init(nsIFile* aGrePath, nsIFile* aAppPath) {
+  InitOne(aGrePath, GRE);
+  InitOne(aAppPath, APP);
+  sInitialized = true;
+}
+
+void Omnijar::CleanUp() {
+  CleanUpOne(GRE);
+  CleanUpOne(APP);
+  sInitialized = false;
+}
+
+already_AddRefed<nsZipArchive> Omnijar::GetReader(nsIFile* aPath) {
+  MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
+
+  bool equals;
+  nsresult rv;
+
+  if (sPath[GRE]) {
+    rv = sPath[GRE]->Equals(aPath, &equals);
+    if (NS_SUCCEEDED(rv) && equals) {
+      return IsNested(GRE) ? GetOuterReader(GRE) : GetReader(GRE);
+    }
+  }
+  if (sPath[APP]) {
+    rv = sPath[APP]->Equals(aPath, &equals);
+    if (NS_SUCCEEDED(rv) && equals) {
+      return IsNested(APP) ? GetOuterReader(APP) : GetReader(APP);
+    }
+  }
+  return nullptr;
+}
+
+already_AddRefed<nsZipArchive> Omnijar::GetInnerReader(
+    nsIFile* aPath, const nsACString& aEntry) {
+  MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
+
+  if (!aEntry.EqualsLiteral(MOZ_STRINGIFY(OMNIJAR_NAME))) {
+    return nullptr;
+  }
+
+  bool equals;
+  nsresult rv;
+
+  if (sPath[GRE]) {
+    rv = sPath[GRE]->Equals(aPath, &equals);
+    if (NS_SUCCEEDED(rv) && equals) {
+      return IsNested(GRE) ? GetReader(GRE) : nullptr;
+    }
+  }
+  if (sPath[APP]) {
+    rv = sPath[APP]->Equals(aPath, &equals);
+    if (NS_SUCCEEDED(rv) && equals) {
+      return IsNested(APP) ? GetReader(APP) : nullptr;
+    }
+  }
+  return nullptr;
+}
+
+nsresult Omnijar::GetURIString(Type aType, nsACString& aResult) {
+  MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
+
+  aResult.Truncate();
+
+  // Return an empty string for APP in the unified case.
+  if ((aType == APP) && sIsUnified) {
+    return NS_OK;
+  }
+
+  nsAutoCString omniJarSpec;
+  if (sPath[aType]) {
+    nsresult rv = NS_GetURLSpecFromActualFile(sPath[aType], omniJarSpec);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
+    }
+
+    aResult = "jar:";
+    if (IsNested(aType)) {
+      aResult += "jar:";
+    }
+    aResult += omniJarSpec;
+    aResult += "!";
+    if (IsNested(aType)) {
+      aResult += "/" MOZ_STRINGIFY(OMNIJAR_NAME) "!";
+    }
+  } else {
+    nsCOMPtr<nsIFile> dir;
+    nsDirectoryService::gService->Get(SPROP(aType), NS_GET_IID(nsIFile),
+                                      getter_AddRefs(dir));
+    nsresult rv = NS_GetURLSpecFromActualFile(dir, aResult);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
+    }
+  }
+  aResult += "/";
+  return NS_OK;
+}
+
+} /* namespace mozilla */