1 files changed, 187 insertions, 0 deletions
diff --git a/layout/tools/layout-debug/src/nsLayoutDebugCLH.cpp b/layout/tools/layout-debug/src/nsLayoutDebugCLH.cpp
new file mode 100644
index 0000000000..c50f3af44a
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsLayoutDebugCLH.cpp
@@ -0,0 +1,187 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+// vim:cindent:tabstop=4:expandtab:shiftwidth=4:
+/* 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 "nsLayoutDebugCLH.h"
+#include "mozIDOMWindow.h"
+#include "nsArray.h"
+#include "nsString.h"
+#include "nsComponentManagerUtils.h"
+#include "nsCOMPtr.h"
+#include "nsIWindowWatcher.h"
+#include "nsISupportsPrimitives.h"
+#include "nsICommandLine.h"
+#include "nsIURI.h"
+#include "nsServiceManagerUtils.h"
+
+nsLayoutDebugCLH::nsLayoutDebugCLH() = default;
+
+nsLayoutDebugCLH::~nsLayoutDebugCLH() = default;
+
+NS_IMPL_ISUPPORTS(nsLayoutDebugCLH, ICOMMANDLINEHANDLER)
+
+static nsresult HandleFlagWithOptionalArgument(nsICommandLine* aCmdLine,
+                                               const nsAString& aName,
+                                               const nsAString& aDefaultValue,
+                                               nsAString& aValue,
+                                               bool& aFlagPresent) {
+  aValue.Truncate();
+  aFlagPresent = false;
+
+  nsresult rv;
+  int32_t idx;
+
+  rv = aCmdLine->FindFlag(aName, false, &idx);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (idx < 0) return NS_OK;
+
+  aFlagPresent = true;
+
+  int32_t length;
+  aCmdLine->GetLength(&length);
+
+  bool argPresent = false;
+
+  if (idx + 1 < length) {
+    rv = aCmdLine->GetArgument(idx + 1, aValue);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (!aValue.IsEmpty() && aValue.CharAt(0) == '-') {
+      aValue.Truncate();
+    } else {
+      argPresent = true;
+    }
+  }
+
+  if (!argPresent) {
+    aValue = aDefaultValue;
+  }
+
+  return aCmdLine->RemoveArguments(idx, idx + argPresent);
+}
+
+static nsresult HandleFlagWithOptionalArgument(nsICommandLine* aCmdLine,
+                                               const nsAString& aName,
+                                               double aDefaultValue,
+                                               double& aValue,
+                                               bool& aFlagPresent) {
+  nsresult rv;
+  nsString s;
+
+  rv =
+      HandleFlagWithOptionalArgument(aCmdLine, aName, u"0"_ns, s, aFlagPresent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (!aFlagPresent) {
+    aValue = 0.0;
+    return NS_OK;
+  }
+
+  aValue = s.ToDouble(&rv);
+  return rv;
+}
+
+static nsresult AppendArg(nsIMutableArray* aArray, const nsAString& aString) {
+  nsCOMPtr<nsISupportsString> s =
+      do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID);
+  NS_ENSURE_TRUE(s, NS_ERROR_FAILURE);
+  s->SetData(aString);
+  return aArray->AppendElement(s);
+}
+
+NS_IMETHODIMP
+nsLayoutDebugCLH::Handle(nsICommandLine* aCmdLine) {
+  nsresult rv;
+  bool flagPresent;
+
+  nsString url;
+  bool autoclose = false;
+  double delay = 0.0;
+  bool captureProfile = false;
+  nsString profileFilename;
+  bool paged = false;
+
+  rv = HandleFlagWithOptionalArgument(aCmdLine, u"layoutdebug"_ns,
+                                      u"about:blank"_ns, url, flagPresent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (!flagPresent) {
+    return NS_OK;
+  }
+
+  rv = HandleFlagWithOptionalArgument(aCmdLine, u"autoclose"_ns, 0.0, delay,
+                                      autoclose);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = HandleFlagWithOptionalArgument(aCmdLine, u"capture-profile"_ns,
+                                      u"profile.json"_ns, profileFilename,
+                                      captureProfile);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aCmdLine->HandleFlag(u"paged"_ns, false, &paged);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIMutableArray> argsArray = nsArray::Create();
+
+  nsCOMPtr<nsIURI> uri;
+  nsAutoCString resolvedSpec;
+
+  rv = aCmdLine->ResolveURI(url, getter_AddRefs(uri));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = uri->GetSpec(resolvedSpec);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = AppendArg(argsArray, NS_ConvertUTF8toUTF16(resolvedSpec));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (autoclose) {
+    nsString arg;
+    arg.AppendPrintf("autoclose=%f", delay);
+
+    rv = AppendArg(argsArray, arg);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  if (captureProfile) {
+    nsString arg;
+    arg.AppendLiteral("profile=");
+    arg.Append(profileFilename);
+
+    rv = AppendArg(argsArray, arg);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  if (paged) {
+    rv = AppendArg(argsArray, u"paged"_ns);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  nsCOMPtr<nsIWindowWatcher> wwatch =
+      do_GetService(NS_WINDOWWATCHER_CONTRACTID);
+  NS_ENSURE_TRUE(wwatch, NS_ERROR_FAILURE);
+
+  nsCOMPtr<mozIDOMWindowProxy> opened;
+  wwatch->OpenWindow(
+      nullptr, "chrome://layoutdebug/content/layoutdebug.xhtml"_ns, "_blank"_ns,
+      "chrome,dialog=no,all"_ns, argsArray, getter_AddRefs(opened));
+  aCmdLine->SetPreventDefault(true);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebugCLH::GetHelpInfo(nsACString& aResult) {
+  aResult.AssignLiteral(
+      "  --layoutdebug [<url>] Start with Layout Debugger\n"
+      "  --autoclose [<seconds>] Automatically close the Layout Debugger once\n"
+      "                     the page has loaded, after delaying the specified\n"
+      "                     number of seconds (which defaults to 0).\n"
+      "  --capture-profile [<filename>] Capture a profile of the Layout\n"
+      "                     Debugger using the Gecko Profiler, and save the\n"
+      "                     profile to the specified file (which defaults to\n"
+      "                     profile.json).\n"
+      "  --paged Layout the page in paginated mode.\n");
+  return NS_OK;
+}