From 0633844f46858135ee62d396829c6292492ca117 Mon Sep 17 00:00:00 2001
From: Moonchild <moonchild@palemoon.org>
Date: Tue, 30 Jun 2020 11:32:07 +0000
Subject: Issue #1603 - Part 1: Reorganize ScriptLoader/ScriptElement

- Moves scripting parts of DOM into 'dom/script'
- Renames nsScript{Loader/Element} to Script{Loader/Element}
- Adjusts all callers
---
 dom/script/ScriptElement.cpp | 150 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 dom/script/ScriptElement.cpp

(limited to 'dom/script/ScriptElement.cpp')

diff --git a/dom/script/ScriptElement.cpp b/dom/script/ScriptElement.cpp
new file mode 100644
index 000000000..0cb17dcb0
--- /dev/null
+++ b/dom/script/ScriptElement.cpp
@@ -0,0 +1,150 @@
+/* -*- 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 "ScriptElement.h"
+#include "ScriptLoader.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/dom/Element.h"
+#include "nsContentUtils.h"
+#include "nsPresContext.h"
+#include "nsIParser.h"
+#include "nsGkAtoms.h"
+#include "nsContentSink.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+NS_IMETHODIMP
+ScriptElement::ScriptAvailable(nsresult aResult,
+                               nsIScriptElement *aElement,
+                               bool aIsInline,
+                               nsIURI *aURI,
+                               int32_t aLineNo)
+{
+  if (!aIsInline && NS_FAILED(aResult)) {
+    nsCOMPtr<nsIParser> parser = do_QueryReferent(mCreatorParser);
+    if (parser) {
+      parser->PushDefinedInsertionPoint();
+    }
+    nsresult rv = FireErrorEvent();
+    if (parser) {
+      parser->PopDefinedInsertionPoint();
+    }
+    return rv;
+  }
+  return NS_OK;
+}
+
+/* virtual */ nsresult
+ScriptElement::FireErrorEvent()
+{
+  nsCOMPtr<nsIContent> cont =
+    do_QueryInterface((nsIScriptElement*) this);
+
+  return nsContentUtils::DispatchTrustedEvent(cont->OwnerDoc(),
+                                              cont,
+                                              NS_LITERAL_STRING("error"),
+                                              false /* bubbles */,
+                                              false /* cancelable */);
+}
+
+NS_IMETHODIMP
+ScriptElement::ScriptEvaluated(nsresult aResult,
+                               nsIScriptElement *aElement,
+                               bool aIsInline)
+{
+  nsresult rv = NS_OK;
+  if (!aIsInline) {
+    nsCOMPtr<nsIContent> cont =
+      do_QueryInterface((nsIScriptElement*) this);
+
+    RefPtr<nsPresContext> presContext =
+      nsContentUtils::GetContextForContent(cont);
+
+    nsEventStatus status = nsEventStatus_eIgnore;
+    EventMessage message = NS_SUCCEEDED(aResult) ? eLoad : eLoadError;
+    WidgetEvent event(true, message);
+    // Load event doesn't bubble.
+    event.mFlags.mBubbles = (message != eLoad);
+
+    EventDispatcher::Dispatch(cont, presContext, &event, nullptr, &status);
+  }
+
+  return rv;
+}
+
+void
+ScriptElement::CharacterDataChanged(nsIDocument *aDocument,
+                                    nsIContent* aContent,
+                                    CharacterDataChangeInfo* aInfo)
+{
+  MaybeProcessScript();
+}
+
+void
+ScriptElement::AttributeChanged(nsIDocument* aDocument,
+                                Element* aElement,
+                                int32_t aNameSpaceID,
+                                nsIAtom* aAttribute,
+                                int32_t aModType,
+                                const nsAttrValue* aOldValue)
+{
+  MaybeProcessScript();
+}
+
+void
+ScriptElement::ContentAppended(nsIDocument* aDocument,
+                               nsIContent* aContainer,
+                               nsIContent* aFirstNewContent,
+                               int32_t aNewIndexInContainer)
+{
+  MaybeProcessScript();
+}
+
+void
+ScriptElement::ContentInserted(nsIDocument *aDocument,
+                               nsIContent* aContainer,
+                               nsIContent* aChild,
+                               int32_t aIndexInContainer)
+{
+  MaybeProcessScript();
+}
+
+bool
+ScriptElement::MaybeProcessScript()
+{
+  nsCOMPtr<nsIContent> cont =
+    do_QueryInterface((nsIScriptElement*) this);
+
+  NS_ASSERTION(cont->DebugGetSlots()->mMutationObservers.Contains(this),
+               "You forgot to add self as observer");
+
+  if (mAlreadyStarted || !mDoneAddingChildren ||
+      !cont->GetComposedDoc() || mMalformed || !HasScriptContent()) {
+    return false;
+  }
+
+  FreezeUriAsyncDefer();
+
+  mAlreadyStarted = true;
+
+  nsIDocument* ownerDoc = cont->OwnerDoc();
+  nsCOMPtr<nsIParser> parser = ((nsIScriptElement*) this)->GetCreatorParser();
+  if (parser) {
+    nsCOMPtr<nsIContentSink> sink = parser->GetContentSink();
+    if (sink) {
+      nsCOMPtr<nsIDocument> parserDoc = do_QueryInterface(sink->GetTarget());
+      if (ownerDoc != parserDoc) {
+        // Willful violation of HTML5 as of 2010-12-01
+        return false;
+      }
+    }
+  }
+
+  RefPtr<ScriptLoader> loader = ownerDoc->ScriptLoader();
+  return loader->ProcessScriptElement(this);
+}
-- 
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