Split ImageResourceClient into ResourceClient and ImageResourceObserver [1/2]

third_party/WebKit/Source/core/loader/ImageLoader.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 163 matching lines @@
     WTF_LOG(Timers, "~ImageLoader %p; m_hasPendingLoadEvent=%d, m_hasPendingErrorEvent=%d",
         this, m_hasPendingLoadEvent, m_hasPendingErrorEvent);
 
 #if !ENABLE(OILPAN)
     if (m_pendingTask)
         m_pendingTask->clearLoader();
 #endif
 
     if (m_image) {
         m_image->removeClient(this);
+        m_image->removeObserver(this);
         m_image = nullptr;
     }
 
 #if !ENABLE(OILPAN)
     ASSERT(m_hasPendingLoadEvent || !loadEventSender().hasPendingEvents(this));
     if (m_hasPendingLoadEvent)
         loadEventSender().cancelEvent(this);
 
     ASSERT(m_hasPendingErrorEvent || !errorEventSender().hasPendingEvents(this));
     if (m_hasPendingErrorEvent)
@@ skipping 24 matching lines @@
         m_image = newImage;
         if (m_hasPendingLoadEvent) {
             loadEventSender().cancelEvent(this);
             m_hasPendingLoadEvent = false;
         }
         if (m_hasPendingErrorEvent) {
             errorEventSender().cancelEvent(this);
             m_hasPendingErrorEvent = false;
         }
         m_imageComplete = true;
-        if (newImage)
+        if (newImage) {
             newImage->addClient(this);
-        if (oldImage)
+            newImage->addObserver(this);
+        }
+        if (oldImage) {
             oldImage->removeClient(this);
+            oldImage->removeObserver(this);
+        }
     }
 
     if (LayoutImageResource* imageResource = layoutImageResource())
         imageResource->resetAnimation();
 }
 
 static void configureRequest(FetchRequest& request, ImageLoader::BypassMainWorldBehavior bypassBehavior, Element& element, const ClientHintsPreferences& clientHintsPreferences)
 {
     if (bypassBehavior == ImageLoader::BypassMainWorldCSP)
         request.setContentSecurityCheck(DoNotCheckContentSecurityPolicy);
@@ skipping 118 matching lines @@
             m_hasPendingErrorEvent = false;
         }
 
         m_image = newImage;
         m_hasPendingLoadEvent = newImage;
         m_imageComplete = !newImage;
 
         updateLayoutObject();
         // If newImage exists and is cached, addClient() will result in the load event
         // being queued to fire. Ensure this happens after beforeload is dispatched.
-        if (newImage)
+        if (newImage) {
             newImage->addClient(this);
-
-        if (oldImage)
+            newImage->addObserver(this);
+        }
+        if (oldImage) {
             oldImage->removeClient(this);
+            oldImage->removeObserver(this);
+        }
     }
 
     if (LayoutImageResource* imageResource = layoutImageResource())
         imageResource->resetAnimation();
 
     // Only consider updating the protection ref-count of the Element immediately before returning
     // from this function as doing so might result in the destruction of this ImageLoader.
     updatedHasPendingEvent();
 }
 
@@ skipping 17 matching lines @@
 
     KURL url = imageSourceToKURL(imageSourceURL);
     if (shouldLoadImmediately(url)) {
         doUpdateFromElement(DoNotBypassMainWorldCSP, updateBehavior, referrerPolicy);
         return;
     }
     // Allow the idiom "img.src=''; img.src='.." to clear down the image before
     // an asynchronous load completes.
     if (imageSourceURL.isEmpty()) {
         ImageResource* image = m_image.get();
-        if (image)
+        if (image) {
             image->removeClient(this);
+            image->removeObserver(this);
+        }
         m_image = nullptr;
     }
 
     // Don't load images for inactive documents. We don't want to slow down the
     // raw HTML parsing case by loading images we don't intend to display.
     Document& document = m_element->document();
     if (document.isActive())
         enqueueImageLoadingMicroTask(updateBehavior, referrerPolicy);
 }
 
@@ skipping 174 matching lines @@
     m_hasPendingErrorEvent = false;
 
     if (element()->document().frame())
         element()->dispatchEvent(Event::create(EventTypeNames::error));
 
     // Only consider updating the protection ref-count of the Element immediately before returning
     // from this function as doing so might result in the destruction of this ImageLoader.
     updatedHasPendingEvent();
 }
 
-bool ImageLoader::getImageAnimationPolicy(ImageResource*, ImageAnimationPolicy& policy)
+bool ImageLoader::getImageAnimationPolicy(ImageAnimationPolicy& policy)
 {
     if (!element()->document().settings())
         return false;
 
     policy = element()->document().settings()->imageAnimationPolicy();
     return true;
 }
 
 void ImageLoader::dispatchPendingLoadEvents()
 {
     loadEventSender().dispatchPendingEvents();
 }
 
 void ImageLoader::dispatchPendingErrorEvents()
 {
     errorEventSender().dispatchPendingEvents();
 }
 
 void ImageLoader::elementDidMoveToNewDocument()
 {
     if (m_loadDelayCounter)
         m_loadDelayCounter->documentChanged(m_element->document());
     clearFailedLoadURL();
     setImage(0);
 }
 
 } // namespace blink