From 2909e5b1c5405acc7c3fc2dfd67f996208178025 Mon Sep 17 00:00:00 2001
From: "ginn.chen%sun.com" <ginn.chen%sun.com>
Date: Tue, 13 Mar 2007 03:22:44 +0000
Subject: [PATCH] Back out bug 372367 due to a regression

---
 accessible/public/nsIAccessible.idl           |  8 ++-
 accessible/src/base/nsAccessible.cpp          |  6 ++
 .../src/base/nsBaseWidgetAccessible.cpp       | 11 ++--
 .../src/html/nsHTMLFormControlAccessible.cpp  | 63 ++++++++++---------
 .../src/xul/nsXULFormControlAccessible.cpp    | 10 ++-
 5 files changed, 58 insertions(+), 40 deletions(-)

diff --git a/accessible/public/nsIAccessible.idl b/accessible/public/nsIAccessible.idl
index 781c8d83de6f..9a154f8d0b1c 100644
--- a/accessible/public/nsIAccessible.idl
+++ b/accessible/public/nsIAccessible.idl
@@ -57,7 +57,7 @@ interface nsIDOMDOMStringList;
  *
  * @status UNDER_REVIEW
  */
-[scriptable, uuid(b3674866-49a9-4cf2-bfea-c00be2d4a695)]
+[scriptable, uuid(58305abc-1b04-4e1e-a7f2-4c52ffa8936b)]
 interface nsIAccessible : nsISupports
 {
   /**
@@ -163,6 +163,12 @@ interface nsIAccessible : nsISupports
    */
   readonly attribute unsigned long extState;
 
+  /**
+   * True if this element is live in an editor.
+   * False if the content is being displayed but not edited. 
+   */
+  readonly attribute boolean isEditable;
+
   /**
    * Help text associated with node
    */
diff --git a/accessible/src/base/nsAccessible.cpp b/accessible/src/base/nsAccessible.cpp
index 2d5d531e43f3..b7e16177e500 100644
--- a/accessible/src/base/nsAccessible.cpp
+++ b/accessible/src/base/nsAccessible.cpp
@@ -2588,6 +2588,12 @@ NS_IMETHODIMP nsAccessible::GetExtState(PRUint32 *aExtState)
   return NS_OK;
 }
 
+NS_IMETHODIMP nsAccessible::GetIsEditable(PRBool *aIsEditable)
+{
+  *aIsEditable = PR_FALSE;
+  return NS_OK;
+}
+
 /* [noscript] void getNativeInterface(out voidPtr aOutAccessible); */
 NS_IMETHODIMP nsAccessible::GetNativeInterface(void **aOutAccessible)
 {
diff --git a/accessible/src/base/nsBaseWidgetAccessible.cpp b/accessible/src/base/nsBaseWidgetAccessible.cpp
index 6373871e3e82..29d34f7e834a 100644
--- a/accessible/src/base/nsBaseWidgetAccessible.cpp
+++ b/accessible/src/base/nsBaseWidgetAccessible.cpp
@@ -146,14 +146,13 @@ NS_IMETHODIMP nsLinkableAccessible::GetState(PRUint32 *aState)
 
   // XXX What if we're in a contenteditable container?
   //     We may need to go up the parent chain unless a better API is found
-  nsCOMPtr<nsIAccessible> docAccessible =
+  nsCOMPtr<nsIAccessible> docAccessible = 
     do_QueryInterface(nsCOMPtr<nsIAccessibleDocument>(GetDocAccessible()));
   if (docAccessible) {
-    PRUint32 aExtState = 0;
-    nsresult rv = GetExtState(&aExtState);
-    if (NS_SUCCEEDED(rv) && (aExtState & EXT_STATE_EDITABLE)) {
-      // Links not focusable in editor
-      *aState &= ~(STATE_FOCUSED | STATE_FOCUSABLE);
+    PRBool isEditable;
+    docAccessible->GetIsEditable(&isEditable);
+    if (isEditable) {
+      *aState &= ~(STATE_FOCUSED | STATE_FOCUSABLE); // Links not focusable in editor
     }
   }
   return NS_OK;
diff --git a/accessible/src/html/nsHTMLFormControlAccessible.cpp b/accessible/src/html/nsHTMLFormControlAccessible.cpp
index 590163b18470..14ebdd7d592b 100644
--- a/accessible/src/html/nsHTMLFormControlAccessible.cpp
+++ b/accessible/src/html/nsHTMLFormControlAccessible.cpp
@@ -286,8 +286,7 @@ nsHyperTextAccessible(aNode, aShell)
 {
 }
 
-NS_IMPL_ISUPPORTS_INHERITED1(nsHTMLTextFieldAccessible, nsHyperTextAccessible,
-                             nsIAccessibleText)
+NS_IMPL_ISUPPORTS_INHERITED2(nsHTMLTextFieldAccessible, nsAccessible, nsIAccessibleText, nsIAccessibleEditableText)
 
 NS_IMETHODIMP nsHTMLTextFieldAccessible::Init()
 {
@@ -369,44 +368,46 @@ NS_IMETHODIMP nsHTMLTextFieldAccessible::GetState(PRUint32 *aState)
 NS_IMETHODIMP nsHTMLTextFieldAccessible::GetExtState(PRUint32 *aExtState)
 {
   nsresult rv = nsHyperTextAccessible::GetExtState(aExtState);
-  NS_ENSURE_SUCCESS(rv, rv);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
 
   nsCOMPtr<nsIDOMHTMLInputElement> htmlInput(do_QueryInterface(mDOMNode, &rv));
   // Is it an <input> or a <textarea> ?
   *aExtState |= htmlInput ? EXT_STATE_SINGLE_LINE : EXT_STATE_MULTI_LINE;
 
-  if (!(*aExtState & EXT_STATE_EDITABLE))
-    return NS_OK;
-
   PRUint32 state;
-  rv = GetState(&state);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  nsCOMPtr<nsIContent> content = do_QueryInterface(mDOMNode);
-  if (content && (content = content->GetBindingParent()) != nsnull &&
-      content->NodeInfo()->Equals(nsAccessibilityAtoms::textbox, kNameSpaceID_XUL)) {
-    // If parent is XUL textbox, then it supports autocompletion if type="autocomplete"
-    if (content->AttrValueIs(kNameSpaceID_None, nsAccessibilityAtoms::type,
-                             NS_LITERAL_STRING("autocomplete"), eIgnoreCase)) {
-      *aExtState |= EXT_STATE_SUPPORTS_AUTOCOMPLETION;
-    }
-  } else if (gIsFormFillEnabled && htmlInput && !(state & STATE_PROTECTED)) {
-    // Check to see if autocompletion is allowed on this input
-    // We don't expose it for password fields even though the entire password can
-    // be remembered for a page if the user asks it to be.
-    // However, the kind of autocomplete we're talking here is based on what
-    // the user types, where a popup of possible choices comes up.
-    nsAutoString autocomplete;
-    htmlInput->GetAttribute(NS_LITERAL_STRING("autocomplete"), autocomplete);
-    if (!autocomplete.LowerCaseEqualsLiteral("off")) {
-      nsCOMPtr<nsIDOMHTMLFormElement> form;
-      htmlInput->GetForm(getter_AddRefs(form));
-      if (form)
-        form->GetAttribute(NS_LITERAL_STRING("autocomplete"), autocomplete);
-      if (!form || !autocomplete.LowerCaseEqualsLiteral("off")) {
+  GetState(&state);
+  const PRUint32 kNonEditableStates = STATE_READONLY | STATE_UNAVAILABLE;
+  if (0 == (state & kNonEditableStates)) {
+    *aExtState |= EXT_STATE_EDITABLE;
+    nsCOMPtr<nsIContent> content = do_QueryInterface(mDOMNode);
+    if (content && (content = content->GetBindingParent()) != nsnull &&
+        content->NodeInfo()->Equals(nsAccessibilityAtoms::textbox, kNameSpaceID_XUL)) {
+      // If parent is XUL textbox, then it supports autocompletion if type="autocomplete"
+      if (content->AttrValueIs(kNameSpaceID_None, nsAccessibilityAtoms::type,
+                               NS_LITERAL_STRING("autocomplete"), eIgnoreCase)) {
         *aExtState |= EXT_STATE_SUPPORTS_AUTOCOMPLETION;
       }
     }
+    else if (gIsFormFillEnabled && htmlInput && !(state & STATE_PROTECTED)) {
+      // Check to see if autocompletion is allowed on this input
+      // We don't expose it for password fields even though the entire password can
+      // be remembered for a page if the user asks it to be.
+      // However, the kind of autocomplete we're talking here is based on what
+      // the user types, where a popup of possible choices comes up.
+      nsAutoString autocomplete;
+      htmlInput->GetAttribute(NS_LITERAL_STRING("autocomplete"), autocomplete);
+      if (!autocomplete.LowerCaseEqualsLiteral("off")) {
+        nsCOMPtr<nsIDOMHTMLFormElement> form;
+        htmlInput->GetForm(getter_AddRefs(form));
+        if (form)
+          form->GetAttribute(NS_LITERAL_STRING("autocomplete"), autocomplete);
+        if (!form || !autocomplete.LowerCaseEqualsLiteral("off")) {
+          *aExtState |= EXT_STATE_SUPPORTS_AUTOCOMPLETION;
+        }
+      }
+    }
   }
 
   return NS_OK;
diff --git a/accessible/src/xul/nsXULFormControlAccessible.cpp b/accessible/src/xul/nsXULFormControlAccessible.cpp
index d8c89c20b3f5..dfde067cf76f 100644
--- a/accessible/src/xul/nsXULFormControlAccessible.cpp
+++ b/accessible/src/xul/nsXULFormControlAccessible.cpp
@@ -635,8 +635,7 @@ nsXULTextFieldAccessible::nsXULTextFieldAccessible(nsIDOMNode* aNode, nsIWeakRef
 {
 }
 
-NS_IMPL_ISUPPORTS_INHERITED1(nsXULTextFieldAccessible, nsHyperTextAccessible,
-                             nsIAccessibleText)
+NS_IMPL_ISUPPORTS_INHERITED2(nsXULTextFieldAccessible, nsAccessible, nsIAccessibleText, nsIAccessibleEditableText)
 
 NS_IMETHODIMP nsXULTextFieldAccessible::Init()
 {
@@ -683,6 +682,13 @@ NS_IMETHODIMP nsXULTextFieldAccessible::GetExtState(PRUint32 *aExtState)
   PRBool isMultiLine = content->HasAttr(kNameSpaceID_None, nsAccessibilityAtoms::multiline);
   *aExtState |= (isMultiLine ? EXT_STATE_MULTI_LINE : EXT_STATE_SINGLE_LINE);
 
+  PRUint32 state;
+  GetState(&state);
+  const PRUint32 kNonEditableStates = STATE_READONLY | STATE_UNAVAILABLE;
+  if (0 == (state & kNonEditableStates)) {
+    *aExtState |= EXT_STATE_EDITABLE;
+  }
+
   return NS_OK;
 }