From a67087fae87ccc6dd60503c2c845f5cd7b24d192 Mon Sep 17 00:00:00 2001
From: Ryan Nematz <rn10950@gmail.com>
Date: Fri, 24 Jun 2016 05:05:39 -0400
Subject: [PATCH] cursor:none and content:none

---
 layout/style/nsCSSParser.cpp    | 6 ++++--
 layout/style/nsRuleNode.cpp     | 5 +++--
 rzTests/rz3-test.css            | 8 ++++++++
 rzTests/rz3-test.htm            | 5 +++++
 widget/src/windows/nsWindow.cpp | 4 +++-
 5 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/layout/style/nsCSSParser.cpp b/layout/style/nsCSSParser.cpp
index 50e55cd6..e1a4ecf0 100644
--- a/layout/style/nsCSSParser.cpp
+++ b/layout/style/nsCSSParser.cpp
@@ -5210,7 +5210,8 @@ PRBool CSSParserImpl::ParseContent(nsresult& aErrorCode)
   // XXX Rewrite to make it look more like ParseCursor or ParseCounterData?
   nsCSSValue  value;
   if (ParseVariant(aErrorCode, value,
-                   VARIANT_CONTENT | VARIANT_INHERIT | VARIANT_NORMAL, 
+                   VARIANT_CONTENT | VARIANT_INHERIT | VARIANT_NORMAL |
+                     VARIANT_NONE, 
                    nsCSSProps::kContentKTable)) {
     nsCSSValueList* listHead = new nsCSSValueList();
     nsCSSValueList* list = listHead;
@@ -5229,7 +5230,8 @@ PRBool CSSParserImpl::ParseContent(nsresult& aErrorCode)
       }
       if (eCSSUnit_Inherit == value.GetUnit() ||
           eCSSUnit_Initial == value.GetUnit() ||
-          eCSSUnit_Normal == value.GetUnit()) {
+          eCSSUnit_Normal == value.GetUnit() ||
+          eCSSUnit_None == value.GetUnit()) {
         // This only matters the first time through the loop.
         return PR_FALSE;
       }
diff --git a/layout/style/nsRuleNode.cpp b/layout/style/nsRuleNode.cpp
index 2441434e..4b0f22d0 100644
--- a/layout/style/nsRuleNode.cpp
+++ b/layout/style/nsRuleNode.cpp
@@ -4186,14 +4186,15 @@ nsRuleNode::ComputeContentData(nsStyleStruct* aStartStruct,
     parentContent = parentContext->GetStyleContent();
   PRBool inherited = aInherited;
 
-  // content: [string, url, counter, attr, enum]+, normal, inherit
+  // content: [string, url, counter, attr, enum]+, normal, none, inherit
   PRUint32 count;
   nsAutoString  buffer;
   nsCSSValueList* contentValue = contentData.mContent;
   if (contentValue) {
     if (eCSSUnit_Normal == contentValue->mValue.GetUnit() ||
+	    eCSSUnit_None == contentValue->mValue.GetUnit() ||
         eCSSUnit_Initial == contentValue->mValue.GetUnit()) {
-      // "normal" and "initial" both mean no content
+      // "normal", "none", and "initial" all mean no content
       content->AllocateContents(0);
     }
     else if (eCSSUnit_Inherit == contentValue->mValue.GetUnit()) {
diff --git a/rzTests/rz3-test.css b/rzTests/rz3-test.css
index d8e3fca5..76692b0e 100644
--- a/rzTests/rz3-test.css
+++ b/rzTests/rz3-test.css
@@ -1,4 +1,12 @@
 /* RetroZilla 3.0 Test Page Stylesheet */
 #bug346690 {
 	cursor: none;
+}
+
+.bug378535:before { 
+    content: "Read this - ";
+}
+
+.bug378535#hometown:before { 
+    content: none;
 }
\ No newline at end of file
diff --git a/rzTests/rz3-test.htm b/rzTests/rz3-test.htm
index 99c31372..25852eb0 100644
--- a/rzTests/rz3-test.htm
+++ b/rzTests/rz3-test.htm
@@ -14,5 +14,10 @@
 	<h3>cursor:none</h3>
 	<img src="test-image.gif" id="bug346690">
 	<hr>
+	<h2>content:none (bug 378535)</h2>
+	<p class="bug378535">My name is Donald</p>
+	<p class="bug378535" id="hometown">I live in Ducksburg</p>
+	
+	<hr>
 </body>
 </html>
\ No newline at end of file
diff --git a/widget/src/windows/nsWindow.cpp b/widget/src/windows/nsWindow.cpp
index ae9040a8..80958c9a 100644
--- a/widget/src/windows/nsWindow.cpp
+++ b/widget/src/windows/nsWindow.cpp
@@ -2777,7 +2777,9 @@ NS_METHOD nsWindow::SetCursor(nsCursor aCursor)
     case eCursor_ew_resize:
       newCursor = ::LoadCursor(NULL, IDC_SIZEWE);
       break;
-
+    case eCursor_none:
+      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_NONE));
+      break;
     default:
       NS_ERROR("Invalid cursor type");
       break;