Support for proprietary style property to allow composer to force broken image icons. b=58646 r=karnaze sr=kin a=asa

content/base/src/nsRuleNode.cpp

@@ -940,7 +940,8 @@ static const PropertyCheckData UserInterfaceCheckProperties[] = {
 static const PropertyCheckData UIResetCheckProperties[] = {
   CHECKDATA_PROP(nsCSSUserInterface, mUserSelect, CHECKDATA_VALUE, PR_FALSE),
   CHECKDATA_PROP(nsCSSUserInterface, mResizer, CHECKDATA_VALUE, PR_FALSE),
-  CHECKDATA_PROP(nsCSSUserInterface, mKeyEquivalent, CHECKDATA_VALUELIST, PR_FALSE)
+  CHECKDATA_PROP(nsCSSUserInterface, mKeyEquivalent, CHECKDATA_VALUELIST, PR_FALSE),
+  CHECKDATA_PROP(nsCSSUserInterface, mForceBrokenImageIcon, CHECKDATA_VALUE, PR_FALSE)
 };
 
 #ifdef INCLUDE_XUL
@@ -2760,6 +2761,11 @@ nsRuleNode::ComputeUIResetData(nsStyleStruct* aStartData, const nsCSSStruct& aDa
     ui->mResizer = parentUI->mResizer;
   }
 
+  // force-broken-image-icons: integer
+  if (eCSSUnit_Integer == uiData.mForceBrokenImageIcon.GetUnit()) {
+    ui->mForceBrokenImageIcon = uiData.mForceBrokenImageIcon.GetIntValue();
+  }
+  
   if (inherited)
     // We inherited, and therefore can't be cached in the rule node.  We have to be put right on the
     // style context.

content/html/style/src/nsCSSDeclaration.cpp

@@ -946,7 +946,8 @@ nsCSSUserInterface::nsCSSUserInterface(const nsCSSUserInterface& aCopy)
     mKeyEquivalent(nsnull),
     mUserFocus(aCopy.mUserFocus),
     mResizer(aCopy.mResizer),
-    mCursor(nsnull)
+    mCursor(nsnull),
+    mForceBrokenImageIcon(aCopy.mForceBrokenImageIcon)
 {
   MOZ_COUNT_CTOR(nsCSSUserInterface);
   CSS_IF_COPY(mCursor, nsCSSValueList);
@@ -988,7 +989,9 @@ void nsCSSUserInterface::List(FILE* out, PRInt32 aIndent) const
     cursor->mValue.AppendToString(buffer, eCSSProperty_cursor);
     cursor = cursor->mNext;
   }
-  
+
+  mForceBrokenImageIcon.AppendToString(buffer,eCSSProperty_force_broken_image_icon);
+
   fputs(NS_LossyConvertUCS2toASCII(buffer).get(), out);
 }
 #endif
@@ -1894,7 +1897,8 @@ nsCSSDeclaration::AppendValue(nsCSSProperty aProperty, const nsCSSValue& aValue)
     case eCSSProperty_key_equivalent:
     case eCSSProperty_user_focus:
     case eCSSProperty_resizer:
-    case eCSSProperty_cursor: {
+    case eCSSProperty_cursor:
+    case eCSSProperty_force_broken_image_icon: {
       CSS_ENSURE(UserInterface) {
         switch (aProperty) {
           case eCSSProperty_user_input:       theUserInterface->mUserInput = aValue;      break;
@@ -1914,7 +1918,8 @@ nsCSSDeclaration::AppendValue(nsCSSProperty aProperty, const nsCSSValue& aValue)
               CSS_IF_DELETE(theUserInterface->mCursor->mNext);
             }
             break;
-          
+          case eCSSProperty_force_broken_image_icon: theUserInterface->mForceBrokenImageIcon = aValue; break;
+
           CSS_BOGUS_DEFAULT; // make compiler happy
         }
       }
@@ -4567,7 +4572,8 @@ nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsCSSValue& aValue)
     case eCSSProperty_key_equivalent:
     case eCSSProperty_user_focus:
     case eCSSProperty_resizer:
-    case eCSSProperty_cursor: {
+    case eCSSProperty_cursor:
+    case eCSSProperty_force_broken_image_icon: {
       CSS_VARONSTACK_GET(UserInterface);
       if (nsnull != theUserInterface) {
         switch (aProperty) {
@@ -4586,7 +4592,8 @@ nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsCSSValue& aValue)
               aValue = theUserInterface->mCursor->mValue;
             }
             break;
-          
+          case eCSSProperty_force_broken_image_icon: aValue = theUserInterface->mForceBrokenImageIcon; break;
+
           CSS_BOGUS_DEFAULT; // make compiler happy
         }
       }

content/html/style/src/nsCSSDeclaration.h

@@ -240,6 +240,7 @@ struct nsCSSDisplay : public nsCSSStruct  {
   // in nsCSSDeclaration objects but because it's needed on the
   // stack when the struct is used in WalkRuleTree.
   nsCSSValue mLang;
+
   // temp fix for bug 24000 
   nsCSSValue mBreakBefore;
   nsCSSValue mBreakAfter;
@@ -420,6 +421,7 @@ struct nsCSSUserInterface : public nsCSSStruct  { // NEW
   nsCSSValue      mResizer;
   
   nsCSSValueList* mCursor;
+  nsCSSValue      mForceBrokenImageIcon;
 };
 
 struct nsCSSAural : public nsCSSStruct  { // NEW

content/html/style/src/nsCSSParser.cpp

@@ -3760,6 +3760,8 @@ PRBool CSSParserImpl::ParseSingleValueProperty(PRInt32& aErrorCode,
   case eCSSProperty_height:
   case eCSSProperty_width:
     return ParsePositiveVariant(aErrorCode, aValue, VARIANT_AHLP, nsnull);
+  case eCSSProperty_force_broken_image_icon:
+    return ParsePositiveVariant(aErrorCode, aValue, VARIANT_INTEGER, nsnull);
   case eCSSProperty_caption_side:
     return ParseVariant(aErrorCode, aValue, VARIANT_HK, 
                         nsCSSProps::kCaptionSideKTable);

content/html/style/src/nsCSSStruct.cpp

@@ -946,7 +946,8 @@ nsCSSUserInterface::nsCSSUserInterface(const nsCSSUserInterface& aCopy)
     mKeyEquivalent(nsnull),
     mUserFocus(aCopy.mUserFocus),
     mResizer(aCopy.mResizer),
-    mCursor(nsnull)
+    mCursor(nsnull),
+    mForceBrokenImageIcon(aCopy.mForceBrokenImageIcon)
 {
   MOZ_COUNT_CTOR(nsCSSUserInterface);
   CSS_IF_COPY(mCursor, nsCSSValueList);
@@ -988,7 +989,9 @@ void nsCSSUserInterface::List(FILE* out, PRInt32 aIndent) const
     cursor->mValue.AppendToString(buffer, eCSSProperty_cursor);
     cursor = cursor->mNext;
   }
-  
+
+  mForceBrokenImageIcon.AppendToString(buffer,eCSSProperty_force_broken_image_icon);
+
   fputs(NS_LossyConvertUCS2toASCII(buffer).get(), out);
 }
 #endif
@@ -1894,7 +1897,8 @@ nsCSSDeclaration::AppendValue(nsCSSProperty aProperty, const nsCSSValue& aValue)
     case eCSSProperty_key_equivalent:
     case eCSSProperty_user_focus:
     case eCSSProperty_resizer:
-    case eCSSProperty_cursor: {
+    case eCSSProperty_cursor:
+    case eCSSProperty_force_broken_image_icon: {
       CSS_ENSURE(UserInterface) {
         switch (aProperty) {
           case eCSSProperty_user_input:       theUserInterface->mUserInput = aValue;      break;
@@ -1914,7 +1918,8 @@ nsCSSDeclaration::AppendValue(nsCSSProperty aProperty, const nsCSSValue& aValue)
               CSS_IF_DELETE(theUserInterface->mCursor->mNext);
             }
             break;
-          
+          case eCSSProperty_force_broken_image_icon: theUserInterface->mForceBrokenImageIcon = aValue; break;
+
           CSS_BOGUS_DEFAULT; // make compiler happy
         }
       }
@@ -4567,7 +4572,8 @@ nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsCSSValue& aValue)
     case eCSSProperty_key_equivalent:
     case eCSSProperty_user_focus:
     case eCSSProperty_resizer:
-    case eCSSProperty_cursor: {
+    case eCSSProperty_cursor:
+    case eCSSProperty_force_broken_image_icon: {
       CSS_VARONSTACK_GET(UserInterface);
       if (nsnull != theUserInterface) {
         switch (aProperty) {
@@ -4586,7 +4592,8 @@ nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsCSSValue& aValue)
               aValue = theUserInterface->mCursor->mValue;
             }
             break;
-          
+          case eCSSProperty_force_broken_image_icon: aValue = theUserInterface->mForceBrokenImageIcon; break;
+
           CSS_BOGUS_DEFAULT; // make compiler happy
         }
       }

content/html/style/src/nsCSSStruct.h

@@ -240,6 +240,7 @@ struct nsCSSDisplay : public nsCSSStruct  {
   // in nsCSSDeclaration objects but because it's needed on the
   // stack when the struct is used in WalkRuleTree.
   nsCSSValue mLang;
+
   // temp fix for bug 24000 
   nsCSSValue mBreakBefore;
   nsCSSValue mBreakAfter;
@@ -420,6 +421,7 @@ struct nsCSSUserInterface : public nsCSSStruct  { // NEW
   nsCSSValue      mResizer;
   
   nsCSSValueList* mCursor;
+  nsCSSValue      mForceBrokenImageIcon;
 };
 
 struct nsCSSAural : public nsCSSStruct  { // NEW

content/html/style/src/nsCSSStyleRule.cpp

@@ -2406,6 +2406,9 @@ MapUIForDeclaration(nsCSSDeclaration* aDecl, const nsStyleStructID& aID, nsCSSUs
 
     if (aUI.mResizer.GetUnit() == eCSSUnit_Null && ourUI->mResizer.GetUnit() != eCSSUnit_Null)
       aUI.mResizer = ourUI->mResizer;
+
+    if (aUI.mForceBrokenImageIcon.GetUnit() == eCSSUnit_Null && ourUI->mForceBrokenImageIcon.GetUnit() == eCSSUnit_Integer)
+      aUI.mForceBrokenImageIcon = ourUI->mForceBrokenImageIcon;
   }
 
   return NS_OK;

content/shared/public/nsCSSPropList.h

@@ -163,6 +163,7 @@ CSS_PROP(font-stretch, font_stretch, REFLOW)
 CSS_PROP(font-style, font_style, REFLOW)
 CSS_PROP(font-variant, font_variant, REFLOW)
 CSS_PROP(font-weight, font_weight, REFLOW)
+CSS_PROP(-moz-force-broken-image-icon, force_broken_image_icon, FRAMECHANGE) // bug 58646
 CSS_PROP(height, height, REFLOW)
 CSS_PROP(-moz-image-region, image_region, REFLOW)
 CSS_PROP(-x-image-region-bottom, image_region_bottom, REFLOW)

content/shared/public/nsStyleStruct.h

@@ -1092,6 +1092,7 @@ struct nsStyleUIReset: public nsStyleStruct {
   PRUint8   mUserSelect;      // [reset] (selection-style)
   PRUnichar mKeyEquivalent;   // [reset] XXX what type should this be?
   PRUint8   mResizer;         // [reset]
+  PRUint8   mForceBrokenImageIcon; // [reset]  (0 if not forcing, otherwise forcing)
 };
 
 struct nsStyleUserInterface: public nsStyleStruct {

content/shared/src/nsStyleStruct.cpp

@@ -1389,6 +1389,7 @@ nsStyleUIReset::nsStyleUIReset(void)
   mUserSelect = NS_STYLE_USER_SELECT_AUTO;
   mKeyEquivalent = PRUnichar(0); // XXX what type should this be?
   mResizer = NS_STYLE_RESIZER_AUTO;
+  mForceBrokenImageIcon = 0;
 }
 
 nsStyleUIReset::nsStyleUIReset(const nsStyleUIReset& aSource) 
@@ -1396,6 +1397,7 @@ nsStyleUIReset::nsStyleUIReset(const nsStyleUIReset& aSource)
   mUserSelect = aSource.mUserSelect;
   mKeyEquivalent = aSource.mKeyEquivalent;
   mResizer = aSource.mResizer;
+  mForceBrokenImageIcon = aSource.mForceBrokenImageIcon;
 }
 
 nsStyleUIReset::~nsStyleUIReset(void) 
@@ -1404,8 +1406,9 @@ nsStyleUIReset::~nsStyleUIReset(void)
 
 PRInt32 nsStyleUIReset::CalcDifference(const nsStyleUIReset& aOther) const
 {
-  if (mResizer == aOther.mResizer) {
+  if (mForceBrokenImageIcon == aOther.mForceBrokenImageIcon) {
-    if (mUserSelect == aOther.mUserSelect) {
+    if (mResizer == aOther.mResizer &&
+        mUserSelect == aOther.mUserSelect) {
       if (mKeyEquivalent == aOther.mKeyEquivalent) {
         return NS_STYLE_HINT_NONE;
       }
@@ -1413,6 +1416,5 @@ PRInt32 nsStyleUIReset::CalcDifference(const nsStyleUIReset& aOther) const
     }
     return NS_STYLE_HINT_VISUAL;
   }
-  
+  return NS_STYLE_HINT_FRAMECHANGE;
-  return NS_STYLE_HINT_VISUAL;
 }

editor/ui/composer/content/EditorContent.css

@@ -110,3 +110,6 @@ span[-moz-smiley="s7"] {
   background-image: url(chrome://editor/content/images/undecided_n.gif);
 }
 
+img {
+  -moz-force-broken-image-icon: 1;
+}

layout/generic/nsImageFrame.cpp

@@ -114,6 +114,12 @@
 #define NS_ICON_LOADING_IMAGE (0)
 #define NS_ICON_BROKEN_IMAGE  (1)
 
+// sizes (pixels) for image icon, padding and border frame
+#define ICON_SIZE        (16)
+#define ICON_PADDING     (3)
+#define ALT_BORDER_WIDTH (1)
+
+
 // Default alignment value (so we can tell an unset value from a set value)
 #define ALIGN_UNSET PRUint8(-1)
 
@@ -653,7 +659,7 @@ NS_IMETHODIMP nsImageFrame::OnStopDecode(imgIRequest *aRequest, nsIPresContext *
       mContent->GetAttr(kNameSpaceID_HTML, nsHTMLAtoms::usemap, usemap);    
       if (usemap.IsEmpty()) {
         // check if we want to honor the ALT text in the IMG frame, or let the preShell make it into inline text
-        //  - if QuirksMode, and the IMG has a size, then render the ALT text in the ING frame
+        //  - if QuirksMode, and the IMG has a size, then render the ALT text in the IMG frame
         //    UNLESS there is a pref set to force inline alt text
         PRBool useSizedBox = PR_FALSE;
         PRBool prefForceInlineAltText = mIconLoad ? mIconLoad->mPrefForceInlineAltText : PR_FALSE;
@@ -667,11 +673,24 @@ NS_IMETHODIMP nsImageFrame::OnStopDecode(imgIRequest *aRequest, nsIPresContext *
         nsCompatibility mode;
         aPresContext->GetCompatibilityMode(&mode);
         
-        // wrap it all up
+        // check for being in Composer: if we are, we always show the size-box
-        useSizedBox = !prefForceInlineAltText &&
+        PRBool forceIcon = PR_FALSE;
-                      HaveFixedSize(*stylePosition) && 
+
-                      mode == eCompatibility_NavQuirks &&
+        // check for style property that indicates the icon should always be shown
-                      !mImageBlocked;
+        const nsStyleUIReset* styleData;
+        GetStyleData(eStyleStruct_UIReset, (const nsStyleStruct*&) styleData);
+        if (styleData->mForceBrokenImageIcon) {
+          forceIcon = PR_TRUE;
+        }
+
+        // wrap it all up: use the size box if
+        // - in editor
+        // - not forcing inline alt text, have fixed size, in quirks mode, image not blocked
+        useSizedBox = forceIcon ||
+                      (!prefForceInlineAltText &&
+                       HaveFixedSize(*stylePosition) && 
+                       mode == eCompatibility_NavQuirks &&
+                       !mImageBlocked);
 
         if (!useSizedBox) {
           // let the presShell handle converting this into the inline alt text frame
@@ -745,18 +764,39 @@ nsImageFrame::GetDesiredSize(nsIPresContext* aPresContext,
   // check to see if the size is already known by the image container.
   if (mLoads[0].mIntrinsicSize.width == 0 &&
       mLoads[0].mIntrinsicSize.height == 0) {
+    PRBool needMinIconSizing = PR_FALSE;
+    float p2t;
+    aPresContext->GetPixelsToTwips(&p2t);
     if (mLoads[0].mRequest) {
       nsCOMPtr<imgIContainer> con;
       mLoads[0].mRequest->GetImage(getter_AddRefs(con));
       if (con) {
-        float p2t;
         nscoord width, height;
 
-        aPresContext->GetPixelsToTwips(&p2t);
         con->GetWidth(&width);
         con->GetHeight(&height);
         mLoads[0].mIntrinsicSize.width = NSIntPixelsToTwips(width, p2t);
         mLoads[0].mIntrinsicSize.height = NSIntPixelsToTwips(height, p2t);
+      } else {
+        // no image container, so we may need to synthesize a minimum size for the image icons
+        needMinIconSizing = PR_TRUE;
+      }
+    } else {
+      // no request, so we may need to synthesize a minimum size for the image icons
+      needMinIconSizing = PR_TRUE;
+    }
+
+    if (needMinIconSizing) {
+      // XXX:  we need this in composer, but it is also good for general quirks mode to always
+      // XXX:  have room for the icon
+      // check for quirks mode
+      nsCompatibility mode;
+      aPresContext->GetCompatibilityMode(&mode);
+      if (mode == eCompatibility_NavQuirks) {
+        // image request is null or image size not known, probably an invalid image specified
+        // - make the image big enough for the icon (it may not be used if inline alt expansion is used instead)
+        mLoads[0].mIntrinsicSize.width = NSIntPixelsToTwips(ICON_SIZE+(2*(ICON_PADDING+ALT_BORDER_WIDTH)), p2t);
+        mLoads[0].mIntrinsicSize.height = NSIntPixelsToTwips(ICON_SIZE+(2*(ICON_PADDING+ALT_BORDER_WIDTH)), p2t);
       }
     }
   }
@@ -1088,10 +1128,6 @@ struct nsRecessedBorder : public nsStyleBorder {
   }
 };
 
-#define ICON_SIZE        (16)
-#define ICON_PADDING     (6)
-#define ALT_BORDER_WIDTH (1)
-
 void
 nsImageFrame::DisplayAltFeedback(nsIPresContext*      aPresContext,
                                  nsIRenderingContext& aRenderingContext,
@@ -1107,6 +1143,12 @@ nsImageFrame::DisplayAltFeedback(nsIPresContext*      aPresContext,
   aPresContext->GetScaledPixelsToTwips(&p2t);
   borderEdgeWidth = NSIntPixelsToTwips(ALT_BORDER_WIDTH, p2t);
 
+  // if inner area is empty, then make it big enough for at least the icon
+  if (inner.IsEmpty()){
+    inner.SizeBy(2*(NSIntPixelsToTwips(ICON_SIZE+ICON_PADDING+ALT_BORDER_WIDTH,p2t)),
+                 2*(NSIntPixelsToTwips(ICON_SIZE+ICON_PADDING+ALT_BORDER_WIDTH,p2t)));
+  }
+
   // Make sure we have enough room to actually render the border within
   // our frame bounds
   if ((inner.width < 2 * borderEdgeWidth) || (inner.height < 2 * borderEdgeWidth)) {
@@ -1249,6 +1291,7 @@ nsImageFrame::Paint(nsIPresContext*      aPresContext,
     if (loadStatus & imgIRequest::STATUS_ERROR || !imgCon) {
       // No image yet, or image load failed. Draw the alt-text and an icon
       // indicating the status (unless image is blocked, in which case we show nothing)
+
 #ifndef SUPPRESS_LOADING_ICON
       if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer &&
           (!mImageBlocked || mIconLoad->mPrefAllImagesBlocked)) {

layout/html/base/src/nsImageFrame.cpp

@@ -114,6 +114,12 @@
 #define NS_ICON_LOADING_IMAGE (0)
 #define NS_ICON_BROKEN_IMAGE  (1)
 
+// sizes (pixels) for image icon, padding and border frame
+#define ICON_SIZE        (16)
+#define ICON_PADDING     (3)
+#define ALT_BORDER_WIDTH (1)
+
+
 // Default alignment value (so we can tell an unset value from a set value)
 #define ALIGN_UNSET PRUint8(-1)
 
@@ -653,7 +659,7 @@ NS_IMETHODIMP nsImageFrame::OnStopDecode(imgIRequest *aRequest, nsIPresContext *
       mContent->GetAttr(kNameSpaceID_HTML, nsHTMLAtoms::usemap, usemap);    
       if (usemap.IsEmpty()) {
         // check if we want to honor the ALT text in the IMG frame, or let the preShell make it into inline text
-        //  - if QuirksMode, and the IMG has a size, then render the ALT text in the ING frame
+        //  - if QuirksMode, and the IMG has a size, then render the ALT text in the IMG frame
         //    UNLESS there is a pref set to force inline alt text
         PRBool useSizedBox = PR_FALSE;
         PRBool prefForceInlineAltText = mIconLoad ? mIconLoad->mPrefForceInlineAltText : PR_FALSE;
@@ -667,11 +673,24 @@ NS_IMETHODIMP nsImageFrame::OnStopDecode(imgIRequest *aRequest, nsIPresContext *
         nsCompatibility mode;
         aPresContext->GetCompatibilityMode(&mode);
         
-        // wrap it all up
+        // check for being in Composer: if we are, we always show the size-box
-        useSizedBox = !prefForceInlineAltText &&
+        PRBool forceIcon = PR_FALSE;
-                      HaveFixedSize(*stylePosition) && 
+
-                      mode == eCompatibility_NavQuirks &&
+        // check for style property that indicates the icon should always be shown
-                      !mImageBlocked;
+        const nsStyleUIReset* styleData;
+        GetStyleData(eStyleStruct_UIReset, (const nsStyleStruct*&) styleData);
+        if (styleData->mForceBrokenImageIcon) {
+          forceIcon = PR_TRUE;
+        }
+
+        // wrap it all up: use the size box if
+        // - in editor
+        // - not forcing inline alt text, have fixed size, in quirks mode, image not blocked
+        useSizedBox = forceIcon ||
+                      (!prefForceInlineAltText &&
+                       HaveFixedSize(*stylePosition) && 
+                       mode == eCompatibility_NavQuirks &&
+                       !mImageBlocked);
 
         if (!useSizedBox) {
           // let the presShell handle converting this into the inline alt text frame
@@ -745,18 +764,39 @@ nsImageFrame::GetDesiredSize(nsIPresContext* aPresContext,
   // check to see if the size is already known by the image container.
   if (mLoads[0].mIntrinsicSize.width == 0 &&
       mLoads[0].mIntrinsicSize.height == 0) {
+    PRBool needMinIconSizing = PR_FALSE;
+    float p2t;
+    aPresContext->GetPixelsToTwips(&p2t);
     if (mLoads[0].mRequest) {
       nsCOMPtr<imgIContainer> con;
       mLoads[0].mRequest->GetImage(getter_AddRefs(con));
       if (con) {
-        float p2t;
         nscoord width, height;
 
-        aPresContext->GetPixelsToTwips(&p2t);
         con->GetWidth(&width);
         con->GetHeight(&height);
         mLoads[0].mIntrinsicSize.width = NSIntPixelsToTwips(width, p2t);
         mLoads[0].mIntrinsicSize.height = NSIntPixelsToTwips(height, p2t);
+      } else {
+        // no image container, so we may need to synthesize a minimum size for the image icons
+        needMinIconSizing = PR_TRUE;
+      }
+    } else {
+      // no request, so we may need to synthesize a minimum size for the image icons
+      needMinIconSizing = PR_TRUE;
+    }
+
+    if (needMinIconSizing) {
+      // XXX:  we need this in composer, but it is also good for general quirks mode to always
+      // XXX:  have room for the icon
+      // check for quirks mode
+      nsCompatibility mode;
+      aPresContext->GetCompatibilityMode(&mode);
+      if (mode == eCompatibility_NavQuirks) {
+        // image request is null or image size not known, probably an invalid image specified
+        // - make the image big enough for the icon (it may not be used if inline alt expansion is used instead)
+        mLoads[0].mIntrinsicSize.width = NSIntPixelsToTwips(ICON_SIZE+(2*(ICON_PADDING+ALT_BORDER_WIDTH)), p2t);
+        mLoads[0].mIntrinsicSize.height = NSIntPixelsToTwips(ICON_SIZE+(2*(ICON_PADDING+ALT_BORDER_WIDTH)), p2t);
       }
     }
   }
@@ -1088,10 +1128,6 @@ struct nsRecessedBorder : public nsStyleBorder {
   }
 };
 
-#define ICON_SIZE        (16)
-#define ICON_PADDING     (6)
-#define ALT_BORDER_WIDTH (1)
-
 void
 nsImageFrame::DisplayAltFeedback(nsIPresContext*      aPresContext,
                                  nsIRenderingContext& aRenderingContext,
@@ -1107,6 +1143,12 @@ nsImageFrame::DisplayAltFeedback(nsIPresContext*      aPresContext,
   aPresContext->GetScaledPixelsToTwips(&p2t);
   borderEdgeWidth = NSIntPixelsToTwips(ALT_BORDER_WIDTH, p2t);
 
+  // if inner area is empty, then make it big enough for at least the icon
+  if (inner.IsEmpty()){
+    inner.SizeBy(2*(NSIntPixelsToTwips(ICON_SIZE+ICON_PADDING+ALT_BORDER_WIDTH,p2t)),
+                 2*(NSIntPixelsToTwips(ICON_SIZE+ICON_PADDING+ALT_BORDER_WIDTH,p2t)));
+  }
+
   // Make sure we have enough room to actually render the border within
   // our frame bounds
   if ((inner.width < 2 * borderEdgeWidth) || (inner.height < 2 * borderEdgeWidth)) {
@@ -1249,6 +1291,7 @@ nsImageFrame::Paint(nsIPresContext*      aPresContext,
     if (loadStatus & imgIRequest::STATUS_ERROR || !imgCon) {
       // No image yet, or image load failed. Draw the alt-text and an icon
       // indicating the status (unless image is blocked, in which case we show nothing)
+
 #ifndef SUPPRESS_LOADING_ICON
       if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer &&
           (!mImageBlocked || mIconLoad->mPrefAllImagesBlocked)) {

layout/style/nsCSSDeclaration.cpp

@@ -946,7 +946,8 @@ nsCSSUserInterface::nsCSSUserInterface(const nsCSSUserInterface& aCopy)
     mKeyEquivalent(nsnull),
     mUserFocus(aCopy.mUserFocus),
     mResizer(aCopy.mResizer),
-    mCursor(nsnull)
+    mCursor(nsnull),
+    mForceBrokenImageIcon(aCopy.mForceBrokenImageIcon)
 {
   MOZ_COUNT_CTOR(nsCSSUserInterface);
   CSS_IF_COPY(mCursor, nsCSSValueList);
@@ -988,7 +989,9 @@ void nsCSSUserInterface::List(FILE* out, PRInt32 aIndent) const
     cursor->mValue.AppendToString(buffer, eCSSProperty_cursor);
     cursor = cursor->mNext;
   }
-  
+
+  mForceBrokenImageIcon.AppendToString(buffer,eCSSProperty_force_broken_image_icon);
+
   fputs(NS_LossyConvertUCS2toASCII(buffer).get(), out);
 }
 #endif
@@ -1894,7 +1897,8 @@ nsCSSDeclaration::AppendValue(nsCSSProperty aProperty, const nsCSSValue& aValue)
     case eCSSProperty_key_equivalent:
     case eCSSProperty_user_focus:
     case eCSSProperty_resizer:
-    case eCSSProperty_cursor: {
+    case eCSSProperty_cursor:
+    case eCSSProperty_force_broken_image_icon: {
       CSS_ENSURE(UserInterface) {
         switch (aProperty) {
           case eCSSProperty_user_input:       theUserInterface->mUserInput = aValue;      break;
@@ -1914,7 +1918,8 @@ nsCSSDeclaration::AppendValue(nsCSSProperty aProperty, const nsCSSValue& aValue)
               CSS_IF_DELETE(theUserInterface->mCursor->mNext);
             }
             break;
-          
+          case eCSSProperty_force_broken_image_icon: theUserInterface->mForceBrokenImageIcon = aValue; break;
+
           CSS_BOGUS_DEFAULT; // make compiler happy
         }
       }
@@ -4567,7 +4572,8 @@ nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsCSSValue& aValue)
     case eCSSProperty_key_equivalent:
     case eCSSProperty_user_focus:
     case eCSSProperty_resizer:
-    case eCSSProperty_cursor: {
+    case eCSSProperty_cursor:
+    case eCSSProperty_force_broken_image_icon: {
       CSS_VARONSTACK_GET(UserInterface);
       if (nsnull != theUserInterface) {
         switch (aProperty) {
@@ -4586,7 +4592,8 @@ nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsCSSValue& aValue)
               aValue = theUserInterface->mCursor->mValue;
             }
             break;
-          
+          case eCSSProperty_force_broken_image_icon: aValue = theUserInterface->mForceBrokenImageIcon; break;
+
           CSS_BOGUS_DEFAULT; // make compiler happy
         }
       }

layout/style/nsCSSDeclaration.h

@@ -240,6 +240,7 @@ struct nsCSSDisplay : public nsCSSStruct  {
   // in nsCSSDeclaration objects but because it's needed on the
   // stack when the struct is used in WalkRuleTree.
   nsCSSValue mLang;
+
   // temp fix for bug 24000 
   nsCSSValue mBreakBefore;
   nsCSSValue mBreakAfter;
@@ -420,6 +421,7 @@ struct nsCSSUserInterface : public nsCSSStruct  { // NEW
   nsCSSValue      mResizer;
   
   nsCSSValueList* mCursor;
+  nsCSSValue      mForceBrokenImageIcon;
 };
 
 struct nsCSSAural : public nsCSSStruct  { // NEW

layout/style/nsCSSParser.cpp

@@ -3760,6 +3760,8 @@ PRBool CSSParserImpl::ParseSingleValueProperty(PRInt32& aErrorCode,
   case eCSSProperty_height:
   case eCSSProperty_width:
     return ParsePositiveVariant(aErrorCode, aValue, VARIANT_AHLP, nsnull);
+  case eCSSProperty_force_broken_image_icon:
+    return ParsePositiveVariant(aErrorCode, aValue, VARIANT_INTEGER, nsnull);
   case eCSSProperty_caption_side:
     return ParseVariant(aErrorCode, aValue, VARIANT_HK, 
                         nsCSSProps::kCaptionSideKTable);

layout/style/nsCSSPropList.h

@@ -163,6 +163,7 @@ CSS_PROP(font-stretch, font_stretch, REFLOW)
 CSS_PROP(font-style, font_style, REFLOW)
 CSS_PROP(font-variant, font_variant, REFLOW)
 CSS_PROP(font-weight, font_weight, REFLOW)
+CSS_PROP(-moz-force-broken-image-icon, force_broken_image_icon, FRAMECHANGE) // bug 58646
 CSS_PROP(height, height, REFLOW)
 CSS_PROP(-moz-image-region, image_region, REFLOW)
 CSS_PROP(-x-image-region-bottom, image_region_bottom, REFLOW)

layout/style/nsCSSStruct.cpp

@@ -946,7 +946,8 @@ nsCSSUserInterface::nsCSSUserInterface(const nsCSSUserInterface& aCopy)
     mKeyEquivalent(nsnull),
     mUserFocus(aCopy.mUserFocus),
     mResizer(aCopy.mResizer),
-    mCursor(nsnull)
+    mCursor(nsnull),
+    mForceBrokenImageIcon(aCopy.mForceBrokenImageIcon)
 {
   MOZ_COUNT_CTOR(nsCSSUserInterface);
   CSS_IF_COPY(mCursor, nsCSSValueList);
@@ -988,7 +989,9 @@ void nsCSSUserInterface::List(FILE* out, PRInt32 aIndent) const
     cursor->mValue.AppendToString(buffer, eCSSProperty_cursor);
     cursor = cursor->mNext;
   }
-  
+
+  mForceBrokenImageIcon.AppendToString(buffer,eCSSProperty_force_broken_image_icon);
+
   fputs(NS_LossyConvertUCS2toASCII(buffer).get(), out);
 }
 #endif
@@ -1894,7 +1897,8 @@ nsCSSDeclaration::AppendValue(nsCSSProperty aProperty, const nsCSSValue& aValue)
     case eCSSProperty_key_equivalent:
     case eCSSProperty_user_focus:
     case eCSSProperty_resizer:
-    case eCSSProperty_cursor: {
+    case eCSSProperty_cursor:
+    case eCSSProperty_force_broken_image_icon: {
       CSS_ENSURE(UserInterface) {
         switch (aProperty) {
           case eCSSProperty_user_input:       theUserInterface->mUserInput = aValue;      break;
@@ -1914,7 +1918,8 @@ nsCSSDeclaration::AppendValue(nsCSSProperty aProperty, const nsCSSValue& aValue)
               CSS_IF_DELETE(theUserInterface->mCursor->mNext);
             }
             break;
-          
+          case eCSSProperty_force_broken_image_icon: theUserInterface->mForceBrokenImageIcon = aValue; break;
+
           CSS_BOGUS_DEFAULT; // make compiler happy
         }
       }
@@ -4567,7 +4572,8 @@ nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsCSSValue& aValue)
     case eCSSProperty_key_equivalent:
     case eCSSProperty_user_focus:
     case eCSSProperty_resizer:
-    case eCSSProperty_cursor: {
+    case eCSSProperty_cursor:
+    case eCSSProperty_force_broken_image_icon: {
       CSS_VARONSTACK_GET(UserInterface);
       if (nsnull != theUserInterface) {
         switch (aProperty) {
@@ -4586,7 +4592,8 @@ nsCSSDeclaration::GetValue(nsCSSProperty aProperty, nsCSSValue& aValue)
               aValue = theUserInterface->mCursor->mValue;
             }
             break;
-          
+          case eCSSProperty_force_broken_image_icon: aValue = theUserInterface->mForceBrokenImageIcon; break;
+
           CSS_BOGUS_DEFAULT; // make compiler happy
         }
       }

layout/style/nsCSSStruct.h

@@ -240,6 +240,7 @@ struct nsCSSDisplay : public nsCSSStruct  {
   // in nsCSSDeclaration objects but because it's needed on the
   // stack when the struct is used in WalkRuleTree.
   nsCSSValue mLang;
+
   // temp fix for bug 24000 
   nsCSSValue mBreakBefore;
   nsCSSValue mBreakAfter;
@@ -420,6 +421,7 @@ struct nsCSSUserInterface : public nsCSSStruct  { // NEW
   nsCSSValue      mResizer;
   
   nsCSSValueList* mCursor;
+  nsCSSValue      mForceBrokenImageIcon;
 };
 
 struct nsCSSAural : public nsCSSStruct  { // NEW

layout/style/nsCSSStyleRule.cpp

@@ -2406,6 +2406,9 @@ MapUIForDeclaration(nsCSSDeclaration* aDecl, const nsStyleStructID& aID, nsCSSUs
 
     if (aUI.mResizer.GetUnit() == eCSSUnit_Null && ourUI->mResizer.GetUnit() != eCSSUnit_Null)
       aUI.mResizer = ourUI->mResizer;
+
+    if (aUI.mForceBrokenImageIcon.GetUnit() == eCSSUnit_Null && ourUI->mForceBrokenImageIcon.GetUnit() == eCSSUnit_Integer)
+      aUI.mForceBrokenImageIcon = ourUI->mForceBrokenImageIcon;
   }
 
   return NS_OK;

layout/style/nsRuleNode.cpp

@@ -940,7 +940,8 @@ static const PropertyCheckData UserInterfaceCheckProperties[] = {
 static const PropertyCheckData UIResetCheckProperties[] = {
   CHECKDATA_PROP(nsCSSUserInterface, mUserSelect, CHECKDATA_VALUE, PR_FALSE),
   CHECKDATA_PROP(nsCSSUserInterface, mResizer, CHECKDATA_VALUE, PR_FALSE),
-  CHECKDATA_PROP(nsCSSUserInterface, mKeyEquivalent, CHECKDATA_VALUELIST, PR_FALSE)
+  CHECKDATA_PROP(nsCSSUserInterface, mKeyEquivalent, CHECKDATA_VALUELIST, PR_FALSE),
+  CHECKDATA_PROP(nsCSSUserInterface, mForceBrokenImageIcon, CHECKDATA_VALUE, PR_FALSE)
 };
 
 #ifdef INCLUDE_XUL
@@ -2760,6 +2761,11 @@ nsRuleNode::ComputeUIResetData(nsStyleStruct* aStartData, const nsCSSStruct& aDa
     ui->mResizer = parentUI->mResizer;
   }
 
+  // force-broken-image-icons: integer
+  if (eCSSUnit_Integer == uiData.mForceBrokenImageIcon.GetUnit()) {
+    ui->mForceBrokenImageIcon = uiData.mForceBrokenImageIcon.GetIntValue();
+  }
+  
   if (inherited)
     // We inherited, and therefore can't be cached in the rule node.  We have to be put right on the
     // style context.

layout/style/nsStyleStruct.cpp

@@ -1389,6 +1389,7 @@ nsStyleUIReset::nsStyleUIReset(void)
   mUserSelect = NS_STYLE_USER_SELECT_AUTO;
   mKeyEquivalent = PRUnichar(0); // XXX what type should this be?
   mResizer = NS_STYLE_RESIZER_AUTO;
+  mForceBrokenImageIcon = 0;
 }
 
 nsStyleUIReset::nsStyleUIReset(const nsStyleUIReset& aSource) 
@@ -1396,6 +1397,7 @@ nsStyleUIReset::nsStyleUIReset(const nsStyleUIReset& aSource)
   mUserSelect = aSource.mUserSelect;
   mKeyEquivalent = aSource.mKeyEquivalent;
   mResizer = aSource.mResizer;
+  mForceBrokenImageIcon = aSource.mForceBrokenImageIcon;
 }
 
 nsStyleUIReset::~nsStyleUIReset(void) 
@@ -1404,8 +1406,9 @@ nsStyleUIReset::~nsStyleUIReset(void)
 
 PRInt32 nsStyleUIReset::CalcDifference(const nsStyleUIReset& aOther) const
 {
-  if (mResizer == aOther.mResizer) {
+  if (mForceBrokenImageIcon == aOther.mForceBrokenImageIcon) {
-    if (mUserSelect == aOther.mUserSelect) {
+    if (mResizer == aOther.mResizer &&
+        mUserSelect == aOther.mUserSelect) {
       if (mKeyEquivalent == aOther.mKeyEquivalent) {
         return NS_STYLE_HINT_NONE;
       }
@@ -1413,6 +1416,5 @@ PRInt32 nsStyleUIReset::CalcDifference(const nsStyleUIReset& aOther) const
     }
     return NS_STYLE_HINT_VISUAL;
   }
-  
+  return NS_STYLE_HINT_FRAMECHANGE;
-  return NS_STYLE_HINT_VISUAL;
 }

layout/style/nsStyleStruct.h

@@ -1092,6 +1092,7 @@ struct nsStyleUIReset: public nsStyleStruct {
   PRUint8   mUserSelect;      // [reset] (selection-style)
   PRUnichar mKeyEquivalent;   // [reset] XXX what type should this be?
   PRUint8   mResizer;         // [reset]
+  PRUint8   mForceBrokenImageIcon; // [reset]  (0 if not forcing, otherwise forcing)
 };
 
 struct nsStyleUserInterface: public nsStyleStruct {