1 files changed, 546 insertions, 0 deletions
diff --git a/toolkit/components/commandlines/nsCommandLine.cpp b/toolkit/components/commandlines/nsCommandLine.cpp
new file mode 100644
index 0000000000..68023089f4
--- /dev/null
+++ b/toolkit/components/commandlines/nsCommandLine.cpp
@@ -0,0 +1,546 @@
+/* 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 "nsCommandLine.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsICategoryManager.h"
+#include "nsICommandLineHandler.h"
+#include "nsICommandLineValidator.h"
+#include "nsIConsoleService.h"
+#include "nsIClassInfoImpl.h"
+#include "nsIFile.h"
+#include "nsISimpleEnumerator.h"
+#include "mozilla/SimpleEnumerator.h"
+
+#include "nsNativeCharsetUtils.h"
+#include "nsNetUtil.h"
+#include "nsIFileProtocolHandler.h"
+#include "nsIURI.h"
+#include "nsUnicharUtils.h"
+#include "nsTextFormatter.h"
+#include "nsXPCOMCID.h"
+
+#ifdef MOZ_WIDGET_COCOA
+#  include <CoreFoundation/CoreFoundation.h>
+#  include "nsILocalFileMac.h"
+#elif defined(XP_WIN)
+#  include <windows.h>
+#  include <shlobj.h>
+#endif
+
+#ifdef DEBUG_bsmedberg
+#  define DEBUG_COMMANDLINE
+#endif
+
+#define NS_COMMANDLINE_CID                           \
+  {                                                  \
+    0x23bcc750, 0xdc20, 0x460b, {                    \
+      0xb2, 0xd4, 0x74, 0xd8, 0xf5, 0x8d, 0x36, 0x15 \
+    }                                                \
+  }
+
+using mozilla::SimpleEnumerator;
+
+nsCommandLine::nsCommandLine()
+    : mState(STATE_INITIAL_LAUNCH), mPreventDefault(false) {}
+
+NS_IMPL_CLASSINFO(nsCommandLine, nullptr, 0, NS_COMMANDLINE_CID)
+NS_IMPL_ISUPPORTS_CI(nsCommandLine, nsICommandLine, nsICommandLineRunner)
+
+NS_IMETHODIMP
+nsCommandLine::GetLength(int32_t* aResult) {
+  *aResult = int32_t(mArgs.Length());
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::GetArgument(int32_t aIndex, nsAString& aResult) {
+  NS_ENSURE_ARG_MIN(aIndex, 0);
+  NS_ENSURE_ARG_MAX(aIndex, int32_t(mArgs.Length() - 1));
+
+  aResult = mArgs[aIndex];
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::FindFlag(const nsAString& aFlag, bool aCaseSensitive,
+                        int32_t* aResult) {
+  NS_ENSURE_ARG(!aFlag.IsEmpty());
+
+  auto c = aCaseSensitive ? nsTDefaultStringComparator<char16_t>
+                          : nsCaseInsensitiveStringComparator;
+
+  for (uint32_t f = 0; f < mArgs.Length(); f++) {
+    const nsString& arg = mArgs[f];
+
+    if (arg.Length() >= 2 && arg.First() == char16_t('-')) {
+      if (aFlag.Equals(Substring(arg, 1), c)) {
+        *aResult = f;
+        return NS_OK;
+      }
+    }
+  }
+
+  *aResult = -1;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::RemoveArguments(int32_t aStart, int32_t aEnd) {
+  NS_ENSURE_ARG_MIN(aStart, 0);
+  NS_ENSURE_ARG_MAX(uint32_t(aEnd) + 1, mArgs.Length());
+
+  mArgs.RemoveElementsRange(mArgs.begin() + aStart, mArgs.begin() + aEnd + 1);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::HandleFlag(const nsAString& aFlag, bool aCaseSensitive,
+                          bool* aResult) {
+  nsresult rv;
+
+  int32_t found;
+  rv = FindFlag(aFlag, aCaseSensitive, &found);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (found == -1) {
+    *aResult = false;
+    return NS_OK;
+  }
+
+  *aResult = true;
+  RemoveArguments(found, found);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::HandleFlagWithParam(const nsAString& aFlag, bool aCaseSensitive,
+                                   nsAString& aResult) {
+  nsresult rv;
+
+  int32_t found;
+  rv = FindFlag(aFlag, aCaseSensitive, &found);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (found == -1) {
+    aResult.SetIsVoid(true);
+    return NS_OK;
+  }
+
+  if (found == int32_t(mArgs.Length()) - 1) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  ++found;
+
+  {  // scope for validity of |param|, which RemoveArguments call invalidates
+    const nsString& param = mArgs[found];
+    if (!param.IsEmpty() && param.First() == '-') {
+      return NS_ERROR_INVALID_ARG;
+    }
+
+    aResult = param;
+  }
+
+  RemoveArguments(found - 1, found);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::GetState(uint32_t* aResult) {
+  *aResult = mState;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::GetPreventDefault(bool* aResult) {
+  *aResult = mPreventDefault;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::SetPreventDefault(bool aValue) {
+  mPreventDefault = aValue;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::GetWorkingDirectory(nsIFile** aResult) {
+  NS_ENSURE_TRUE(mWorkingDir, NS_ERROR_NOT_INITIALIZED);
+
+  NS_ADDREF(*aResult = mWorkingDir);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::ResolveFile(const nsAString& aArgument, nsIFile** aResult) {
+  // First try to resolve as an absolute path if we can.
+  // This will work even if we have no mWorkingDir, which happens if e.g.
+  // the dir from which we were started was deleted before we started,
+#if defined(XP_UNIX)
+  if (aArgument.First() == '/') {
+    nsCOMPtr<nsIFile> lf(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
+    NS_ENSURE_TRUE(lf, NS_ERROR_OUT_OF_MEMORY);
+    nsresult rv = lf->InitWithPath(aArgument);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+
+    lf.forget(aResult);
+    return NS_OK;
+  }
+#elif defined(XP_WIN)
+  nsCOMPtr<nsIFile> lf(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
+  NS_ENSURE_TRUE(lf, NS_ERROR_OUT_OF_MEMORY);
+
+  // Just try creating the file with the absolute path; if it fails,
+  // we'll keep going and try it as a relative path.
+  if (NS_SUCCEEDED(lf->InitWithPath(aArgument))) {
+    lf.forget(aResult);
+    return NS_OK;
+  }
+#endif
+  // If that fails
+  return ResolveRelativeFile(aArgument, aResult);
+}
+
+nsresult nsCommandLine::ResolveRelativeFile(const nsAString& aArgument,
+                                            nsIFile** aResult) {
+  if (!mWorkingDir) {
+    *aResult = nullptr;
+    return NS_OK;
+  }
+
+  // This is some seriously screwed-up code. nsIFile.appendRelativeNativePath
+  // explicitly does not accept .. or . path parts, but that is exactly what we
+  // need here. So we hack around it.
+
+  nsresult rv;
+
+#if defined(MOZ_WIDGET_COCOA)
+  nsCOMPtr<nsILocalFileMac> lfm(do_QueryInterface(mWorkingDir));
+  NS_ENSURE_TRUE(lfm, NS_ERROR_NO_INTERFACE);
+
+  nsCOMPtr<nsILocalFileMac> newfile(
+      do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
+  NS_ENSURE_TRUE(newfile, NS_ERROR_OUT_OF_MEMORY);
+
+  CFURLRef baseurl;
+  rv = lfm->GetCFURL(&baseurl);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsAutoCString path;
+  NS_CopyUnicodeToNative(aArgument, path);
+
+  CFURLRef newurl = CFURLCreateFromFileSystemRepresentationRelativeToBase(
+      nullptr, (const UInt8*)path.get(), path.Length(), true, baseurl);
+
+  CFRelease(baseurl);
+
+  rv = newfile->InitWithCFURL(newurl);
+  CFRelease(newurl);
+  if (NS_FAILED(rv)) return rv;
+
+  newfile.forget(aResult);
+  return NS_OK;
+
+#elif defined(XP_UNIX)
+  nsCOMPtr<nsIFile> lf(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
+  NS_ENSURE_TRUE(lf, NS_ERROR_OUT_OF_MEMORY);
+
+  nsAutoCString nativeArg;
+  NS_CopyUnicodeToNative(aArgument, nativeArg);
+
+  nsAutoCString newpath;
+  mWorkingDir->GetNativePath(newpath);
+
+  newpath.Append('/');
+  newpath.Append(nativeArg);
+
+  rv = lf->InitWithNativePath(newpath);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = lf->Normalize();
+  if (NS_FAILED(rv)) return rv;
+
+  lf.forget(aResult);
+  return NS_OK;
+
+#elif defined(XP_WIN)
+  nsCOMPtr<nsIFile> lf(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
+  NS_ENSURE_TRUE(lf, NS_ERROR_OUT_OF_MEMORY);
+
+  // This is a relative path. We use string magic
+  // and win32 _fullpath. Note that paths of the form "\Relative\To\CurDrive"
+  // are going to fail, and I haven't figured out a way to work around this
+  // without the PathCombine() function, which is not available before
+  // Windows 8; see https://bugzilla.mozilla.org/show_bug.cgi?id=1672814
+
+  nsAutoString fullPath;
+  mWorkingDir->GetPath(fullPath);
+
+  fullPath.Append('\\');
+  fullPath.Append(aArgument);
+
+  WCHAR pathBuf[MAX_PATH];
+  if (!_wfullpath(pathBuf, fullPath.get(), MAX_PATH)) return NS_ERROR_FAILURE;
+
+  rv = lf->InitWithPath(nsDependentString(pathBuf));
+  if (NS_FAILED(rv)) return rv;
+  lf.forget(aResult);
+  return NS_OK;
+
+#else
+#  error Need platform-specific logic here.
+#endif
+}
+
+NS_IMETHODIMP
+nsCommandLine::ResolveURI(const nsAString& aArgument, nsIURI** aResult) {
+  nsresult rv;
+
+  // First, we try to init the argument as an absolute file path. If this
+  // doesn't work, it is an absolute or relative URI.
+
+  nsCOMPtr<nsIIOService> io = do_GetIOService();
+  NS_ENSURE_TRUE(io, NS_ERROR_OUT_OF_MEMORY);
+
+  nsCOMPtr<nsIURI> workingDirURI;
+  if (mWorkingDir) {
+    io->NewFileURI(mWorkingDir, getter_AddRefs(workingDirURI));
+  }
+
+  nsCOMPtr<nsIFile> lf(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
+  rv = lf->InitWithPath(aArgument);
+  if (NS_SUCCEEDED(rv)) {
+    lf->Normalize();
+    nsAutoCString url;
+    // Try to resolve the url for .url files.
+    rv = resolveShortcutURL(lf, url);
+    if (NS_SUCCEEDED(rv) && !url.IsEmpty()) {
+      return io->NewURI(url, nullptr, workingDirURI, aResult);
+    }
+
+    return io->NewFileURI(lf, aResult);
+  }
+
+  return io->NewURI(NS_ConvertUTF16toUTF8(aArgument), nullptr, workingDirURI,
+                    aResult);
+}
+
+void nsCommandLine::appendArg(const char* arg) {
+#ifdef DEBUG_COMMANDLINE
+  printf("Adding XP arg: %s\n", arg);
+#endif
+
+  nsAutoString warg;
+#ifdef XP_WIN
+  CopyUTF8toUTF16(nsDependentCString(arg), warg);
+#else
+  NS_CopyNativeToUnicode(nsDependentCString(arg), warg);
+#endif
+
+  mArgs.AppendElement(warg);
+}
+
+nsresult nsCommandLine::resolveShortcutURL(nsIFile* aFile, nsACString& outURL) {
+  nsCOMPtr<nsIFileProtocolHandler> fph;
+  nsresult rv = NS_GetFileProtocolHandler(getter_AddRefs(fph));
+  if (NS_FAILED(rv)) return rv;
+
+  nsCOMPtr<nsIURI> uri;
+  rv = fph->ReadURLFile(aFile, getter_AddRefs(uri));
+  if (NS_FAILED(rv)) return rv;
+
+  return uri->GetSpec(outURL);
+}
+
+NS_IMETHODIMP
+nsCommandLine::Init(int32_t argc, const char* const* argv, nsIFile* aWorkingDir,
+                    uint32_t aState) {
+  NS_ENSURE_ARG_MAX(aState, 2);
+
+  int32_t i;
+
+  mWorkingDir = aWorkingDir;
+
+  // skip argv[0], we don't want it
+  for (i = 1; i < argc; ++i) {
+    const char* curarg = argv[i];
+
+#ifdef DEBUG_COMMANDLINE
+    printf("Testing native arg %i: '%s'\n", i, curarg);
+#endif
+#if defined(XP_WIN)
+    if (*curarg == '/') {
+      char* dup = strdup(curarg);
+      if (!dup) return NS_ERROR_OUT_OF_MEMORY;
+
+      *dup = '-';
+      char* colon = strchr(dup, ':');
+      if (colon) {
+        *colon = '\0';
+        appendArg(dup);
+        appendArg(colon + 1);
+      } else {
+        appendArg(dup);
+      }
+      free(dup);
+      continue;
+    }
+#endif
+    if (*curarg == '-') {
+      if (*(curarg + 1) == '-') ++curarg;
+
+      char* dup = strdup(curarg);
+      if (!dup) return NS_ERROR_OUT_OF_MEMORY;
+
+      char* eq = strchr(dup, '=');
+      if (eq) {
+        *eq = '\0';
+        appendArg(dup);
+        appendArg(eq + 1);
+      } else {
+        appendArg(dup);
+      }
+      free(dup);
+      continue;
+    }
+
+    appendArg(curarg);
+  }
+
+  mState = aState;
+
+  return NS_OK;
+}
+
+template <typename... T>
+static void LogConsoleMessage(const char16_t* fmt, T... args) {
+  nsString msg;
+  nsTextFormatter::ssprintf(msg, fmt, args...);
+
+  nsCOMPtr<nsIConsoleService> cs =
+      do_GetService("@mozilla.org/consoleservice;1");
+  if (cs) cs->LogStringMessage(msg.get());
+}
+
+nsresult nsCommandLine::EnumerateHandlers(EnumerateHandlersCallback aCallback,
+                                          void* aClosure) {
+  nsresult rv;
+
+  nsCOMPtr<nsICategoryManager> catman(
+      do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
+  NS_ENSURE_TRUE(catman, NS_ERROR_UNEXPECTED);
+
+  nsCOMPtr<nsISimpleEnumerator> entenum;
+  rv = catman->EnumerateCategory("command-line-handler",
+                                 getter_AddRefs(entenum));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  for (auto& categoryEntry : SimpleEnumerator<nsICategoryEntry>(entenum)) {
+    nsAutoCString contractID;
+    categoryEntry->GetValue(contractID);
+
+    nsCOMPtr<nsICommandLineHandler> clh(do_GetService(contractID.get()));
+    if (!clh) {
+      nsCString entry;
+      categoryEntry->GetEntry(entry);
+
+      LogConsoleMessage(
+          u"Contract ID '%s' was registered as a command line handler for "
+          u"entry '%s', but could not be created.",
+          contractID.get(), entry.get());
+      continue;
+    }
+
+    rv = (aCallback)(clh, this, aClosure);
+    if (rv == NS_ERROR_ABORT) break;
+
+    rv = NS_OK;
+  }
+
+  return rv;
+}
+
+nsresult nsCommandLine::EnumerateValidators(
+    EnumerateValidatorsCallback aCallback, void* aClosure) {
+  nsresult rv;
+
+  nsCOMPtr<nsICategoryManager> catman(
+      do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
+  NS_ENSURE_TRUE(catman, NS_ERROR_UNEXPECTED);
+
+  nsCOMPtr<nsISimpleEnumerator> entenum;
+  rv = catman->EnumerateCategory("command-line-validator",
+                                 getter_AddRefs(entenum));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  for (auto& categoryEntry : SimpleEnumerator<nsICategoryEntry>(entenum)) {
+    nsAutoCString contractID;
+    categoryEntry->GetValue(contractID);
+
+    nsCOMPtr<nsICommandLineValidator> clv(do_GetService(contractID.get()));
+    if (!clv) continue;
+
+    rv = (aCallback)(clv, this, aClosure);
+    if (rv == NS_ERROR_ABORT) break;
+
+    rv = NS_OK;
+  }
+
+  return rv;
+}
+
+static nsresult EnumValidate(nsICommandLineValidator* aValidator,
+                             nsICommandLine* aThis, void*) {
+  return aValidator->Validate(aThis);
+}
+
+static nsresult EnumRun(nsICommandLineHandler* aHandler, nsICommandLine* aThis,
+                        void*) {
+  return aHandler->Handle(aThis);
+}
+
+NS_IMETHODIMP
+nsCommandLine::Run() {
+  nsresult rv;
+
+  rv = EnumerateValidators(EnumValidate, nullptr);
+  if (rv == NS_ERROR_ABORT) return rv;
+
+  rv = EnumerateHandlers(EnumRun, nullptr);
+  if (rv == NS_ERROR_ABORT) return rv;
+
+  return NS_OK;
+}
+
+static nsresult EnumHelp(nsICommandLineHandler* aHandler, nsICommandLine* aThis,
+                         void* aClosure) {
+  nsresult rv;
+
+  nsCString text;
+  rv = aHandler->GetHelpInfo(text);
+  if (NS_SUCCEEDED(rv)) {
+    NS_ASSERTION(
+        text.Length() == 0 || text.Last() == '\n',
+        "Help text from command line handlers should end in a newline.");
+
+    nsACString* totalText = reinterpret_cast<nsACString*>(aClosure);
+    totalText->Append(text);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandLine::GetHelpText(nsACString& aResult) {
+  EnumerateHandlers(EnumHelp, &aResult);
+
+  return NS_OK;
+}