Bug 757670 - make nsIPresShell::GetLinkLocation faster, r=bz, tbsaunde

accessible/src/base/nsAccessible.cpp

@@ -23,6 +23,7 @@
 #include "States.h"
 #include "StyleInfo.h"
 
+#include "nsContentUtils.h"
 #include "nsIDOMCSSValue.h"
 #include "nsIDOMCSSPrimitiveValue.h"
 #include "nsIDOMElement.h"
@@ -1679,13 +1680,8 @@ nsAccessible::Value(nsString& aValue)
     return;
 
   // Check if it's a simple xlink.
-  if (nsCoreUtils::IsXLink(mContent)) {
-    nsIPresShell* presShell = mDoc->PresShell();
-    if (presShell) {
-      nsCOMPtr<nsIDOMNode> DOMNode(do_QueryInterface(mContent));
-      presShell->GetLinkLocation(DOMNode, aValue);
-    }
-  }
+  if (nsCoreUtils::IsXLink(mContent))
+    nsContentUtils::GetLinkLocation(mContent->AsElement(), aValue);
 }
 
 // nsIAccessibleValue

accessible/src/html/nsHTMLLinkAccessible.cpp

@@ -6,10 +6,11 @@
 #include "nsHTMLLinkAccessible.h"
 
 #include "nsCoreUtils.h"
+#include "nsDocAccessible.h"
 #include "Role.h"
 #include "States.h"
 
-#include "nsDocAccessible.h"
+#include "nsContentUtils.h"
 #include "nsEventStates.h"
 #include "mozilla/dom/Element.h"
 
@@ -77,12 +78,8 @@ nsHTMLLinkAccessible::Value(nsString& aValue)
   aValue.Truncate();
 
   nsHyperTextAccessible::Value(aValue);
-  if (!aValue.IsEmpty())
-    return;
-  
-  nsIPresShell* presShell(mDoc->PresShell());
-  nsCOMPtr<nsIDOMNode> DOMNode(do_QueryInterface(mContent));
-  presShell->GetLinkLocation(DOMNode, aValue);
+  if (aValue.IsEmpty())
+    nsContentUtils::GetLinkLocation(mContent->AsElement(), aValue);
 }
 
 PRUint8

content/base/public/nsContentUtils.h

@@ -1388,6 +1388,12 @@ public:
                           bool aClick, bool aIsUserTriggered,
                           bool aIsTrusted);
 
+  /**
+   * Get the link location.
+   */
+  static void GetLinkLocation(mozilla::dom::Element* aElement,
+                              nsString& aLocationString);
+
   /**
    * Return top-level widget in the parent chain.
    */

content/base/src/Link.h

@@ -116,6 +116,7 @@ protected:
     return !!uri;
   }
 
+  nsIURI* GetCachedURI() const { return mCachedURI; }
   bool HasCachedURI() const { return !!mCachedURI; }
 
 private:

content/base/src/nsContentUtils.cpp

@@ -4489,6 +4489,19 @@ nsContentUtils::TriggerLink(nsIContent *aContent, nsPresContext *aPresContext,
   }
 }
 
+/* static */
+void
+nsContentUtils::GetLinkLocation(Element* aElement, nsString& aLocationString)
+{
+  nsCOMPtr<nsIURI> hrefURI = aElement->GetHrefURI();
+  if (hrefURI) {
+    nsCAutoString specUTF8;
+    nsresult rv = hrefURI->GetSpec(specUTF8);
+    if (NS_SUCCEEDED(rv))
+      CopyUTF8toUTF16(specUTF8, aLocationString);
+  }
+}
+
 /* static */
 nsIWidget*
 nsContentUtils::GetTopLevelWidget(nsIWidget* aWidget)

content/html/content/src/nsHTMLAnchorElement.cpp

@@ -413,6 +413,12 @@ nsHTMLAnchorElement::GetLinkState() const
 already_AddRefed<nsIURI>
 nsHTMLAnchorElement::GetHrefURI() const
 {
+  nsIURI* uri = Link::GetCachedURI();
+  if (uri) {
+    NS_ADDREF(uri);
+    return uri;
+  }
+
   return GetHrefURIForAnchors();
 }
 

layout/base/nsDocumentViewer.cpp

@@ -2536,10 +2536,15 @@ NS_IMETHODIMP DocumentViewerImpl::CopyLinkLocation()
   // make noise if we're not in a link
   NS_ENSURE_TRUE(node, NS_ERROR_FAILURE);
 
-  nsAutoString locationText;
-  nsresult rv = mPresShell->GetLinkLocation(node, locationText);
-  NS_ENSURE_SUCCESS(rv, rv);
+  nsCOMPtr<dom::Element> elm(do_QueryInterface(node));
+  NS_ENSURE_TRUE(elm, NS_ERROR_FAILURE);
 
+  nsAutoString locationText;
+  nsContentUtils::GetLinkLocation(elm, locationText);
+  if (locationText.IsEmpty())
+    return NS_ERROR_FAILURE;
+
+  nsresult rv = NS_OK;
   nsCOMPtr<nsIClipboardHelper> clipboard(do_GetService("@mozilla.org/widget/clipboardhelper;1", &rv));
   NS_ENSURE_SUCCESS(rv, rv);
 

layout/base/nsIPresShell.h

@@ -112,10 +112,10 @@ typedef struct CapturingContentInfo {
   nsIContent* mContent;
 } CapturingContentInfo;
 
-// d2236911-9b7c-490a-a08b-2580d5f7a6de
+// fcada634-fdea-45f5-b841-0a361d5f6a68
 #define NS_IPRESSHELL_IID \
-  { 0xd2236911, 0x9b7c, 0x490a, \
-    { 0xa0, 0x8b, 0x25, 0x80, 0xd5, 0xf7, 0xa6, 0xde } }
+  { 0xfcada634, 0xfdea, 0x45f5, \
+    { 0xb8, 0x41, 0x0a, 0x36, 0x1d, 0x5f, 0x6a, 0x68 } }
 
 // debug VerifyReflow flags
 #define VERIFY_REFLOW_ON                    0x01
@@ -682,11 +682,6 @@ public:
    */
   virtual NS_HIDDEN_(void) NotifyDestroyingFrame(nsIFrame* aFrame) = 0;
 
-  /**
-   * Get link location.
-   */
-  virtual NS_HIDDEN_(nsresult) GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocation) const = 0;
-
   /**
    * Get the caret, if it exists. AddRefs it.
    */

layout/base/nsPresShell.cpp

@@ -3335,38 +3335,6 @@ PresShell::GetRectVisibility(nsIFrame* aFrame,
   return nsRectVisibility_kVisible;
 }
 
-// GetLinkLocation: copy link location to clipboard
-nsresult PresShell::GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString) const
-{
-#ifdef DEBUG_dr
-  printf("dr :: PresShell::GetLinkLocation\n");
-#endif
-
-  NS_ENSURE_ARG_POINTER(aNode);
-
-  nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
-  if (content) {
-    nsCOMPtr<nsIURI> hrefURI = content->GetHrefURI();
-    if (hrefURI) {
-      nsCAutoString specUTF8;
-      nsresult rv = hrefURI->GetSpec(specUTF8);
-      NS_ENSURE_SUCCESS(rv, rv);
-
-      nsAutoString anchorText;
-      CopyUTF8toUTF16(specUTF8, anchorText);
-
-      // Remove all the '\t', '\r' and '\n' from 'anchorText'
-      static const char strippedChars[] = "\t\r\n";
-      anchorText.StripChars(strippedChars);
-      aLocationString = anchorText;
-      return NS_OK;
-    }
-  }
-
-  // if no link, fail.
-  return NS_ERROR_FAILURE;
-}
-
 void
 PresShell::ScheduleViewManagerFlush()
 {

layout/base/nsPresShell.h

@@ -134,8 +134,6 @@ public:
   virtual NS_HIDDEN_(void) SetIgnoreFrameDestruction(bool aIgnore);
   virtual NS_HIDDEN_(void) NotifyDestroyingFrame(nsIFrame* aFrame);
 
-  virtual NS_HIDDEN_(nsresult) GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString) const;
-
   virtual NS_HIDDEN_(nsresult) CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState, bool aLeavingPage);
 
   virtual NS_HIDDEN_(void) UnsuppressPainting();