Componentize safe_browsing [X+1] : move the renderer part to component.

chrome/renderer/safe_browsing/threat_dom_details.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/renderer/safe_browsing/threat_dom_details.h"
-
-#include <map>
-
-#include "base/compiler_specific.h"
-#include "base/strings/stringprintf.h"
-#include "components/safe_browsing/common/safebrowsing_messages.h"
-#include "content/public/renderer/render_frame.h"
-#include "third_party/WebKit/public/platform/WebString.h"
-#include "third_party/WebKit/public/web/WebDocument.h"
-#include "third_party/WebKit/public/web/WebElement.h"
-#include "third_party/WebKit/public/web/WebElementCollection.h"
-#include "third_party/WebKit/public/web/WebFrame.h"
-#include "third_party/WebKit/public/web/WebLocalFrame.h"
-
-namespace safe_browsing {
-
-// A map for keeping track of the identity of DOM Elements, used to generate
-// unique IDs for each element and lookup elements IDs by parent Element, to
-// maintain proper parent/child relationships.
-// They key is a WebNode from the DOM, which is basically a pointer so can be
-// copied into the map when inserting new elements.
-// The values are pointers to IPC messages generated by ThreatDOMDetails. They
-// are not owned by the map - ownership remains with the vector of resources
-// collected by this class.
-typedef std::map<blink::WebNode, SafeBrowsingHostMsg_ThreatDOMDetails_Node*>
-    ElementToNodeMap;
-
-namespace {
-
-// Handler for the various HTML elements that we extract URLs from.
-void HandleElement(
-    const blink::WebElement& element,
-    SafeBrowsingHostMsg_ThreatDOMDetails_Node* parent_node,
-    std::vector<SafeBrowsingHostMsg_ThreatDOMDetails_Node>* resources,
-    safe_browsing::ElementToNodeMap* element_to_node_map) {
-  if (!element.hasAttribute("src"))
-    return;
-
-  // Retrieve the link and resolve the link in case it's relative.
-  blink::WebURL full_url =
-      element.document().completeURL(element.getAttribute("src"));
-
-  const GURL& child_url = GURL(full_url);
-
-  // Add to the parent node.
-  parent_node->children.push_back(child_url);
-
-  // Create the child node.
-  resources->push_back(SafeBrowsingHostMsg_ThreatDOMDetails_Node());
-  SafeBrowsingHostMsg_ThreatDOMDetails_Node* child_node = &resources->back();
-  child_node->url = child_url;
-  child_node->tag_name = element.tagName().utf8();
-  child_node->parent = parent_node->url;
-
-  // Update the ID mapping. First generate the ID for the current node.
-  // Then, if its parent is available, set the current node's parent ID, and
-  // also update the parent's children with the current node's ID.
-  const int child_id = element_to_node_map->size() + 1;
-  child_node->node_id = child_id;
-  if (!element.parentNode().isNull()) {
-    auto parent_node_iter = element_to_node_map->find(element.parentNode());
-    if (parent_node_iter != element_to_node_map->end()) {
-      child_node->parent_node_id = parent_node->node_id;
-      parent_node->child_node_ids.push_back(child_id);
-    }
-  }
-  (*element_to_node_map)[element] = child_node;
-}
-
-}  // namespace
-
-// An upper limit on the number of nodes we collect.
-uint32_t ThreatDOMDetails::kMaxNodes = 500;
-
-// static
-ThreatDOMDetails* ThreatDOMDetails::Create(content::RenderFrame* render_frame) {
-  // Private constructor and public static Create() method to facilitate
-  // stubbing out this class for binary-size reduction purposes.
-  return new ThreatDOMDetails(render_frame);
-}
-
-ThreatDOMDetails::ThreatDOMDetails(content::RenderFrame* render_frame)
-    : content::RenderFrameObserver(render_frame) {}
-
-ThreatDOMDetails::~ThreatDOMDetails() {}
-
-bool ThreatDOMDetails::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(ThreatDOMDetails, message)
-    IPC_MESSAGE_HANDLER(SafeBrowsingMsg_GetThreatDOMDetails,
-                        OnGetThreatDOMDetails)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void ThreatDOMDetails::OnGetThreatDOMDetails() {
-  std::vector<SafeBrowsingHostMsg_ThreatDOMDetails_Node> resources;
-  ExtractResources(&resources);
-  // Notify the browser.
-  Send(new SafeBrowsingHostMsg_ThreatDOMDetails(routing_id(), resources));
-}
-
-void ThreatDOMDetails::ExtractResources(
-    std::vector<SafeBrowsingHostMsg_ThreatDOMDetails_Node>* resources) {
-  blink::WebFrame* frame = render_frame()->GetWebFrame();
-  if (!frame)
-    return;
-  SafeBrowsingHostMsg_ThreatDOMDetails_Node details_node;
-  blink::WebDocument document = frame->document();
-  details_node.url = GURL(document.url());
-  if (document.isNull()) {
-    // Nothing in this frame. Just report its URL.
-    resources->push_back(details_node);
-    return;
-  }
-
-  ElementToNodeMap element_to_node_map;
-  blink::WebElementCollection elements = document.all();
-  blink::WebElement element = elements.firstItem();
-  for (; !element.isNull(); element = elements.nextItem()) {
-    if (element.hasHTMLTagName("iframe") || element.hasHTMLTagName("frame") ||
-        element.hasHTMLTagName("embed") || element.hasHTMLTagName("script")) {
-      HandleElement(element, &details_node, resources, &element_to_node_map);
-      if (resources->size() >= kMaxNodes) {
-        // We have reached kMaxNodes, exit early.
-        resources->push_back(details_node);
-        return;
-      }
-    }
-  }
-  resources->push_back(details_node);
-}
-
-void ThreatDOMDetails::OnDestruct() {
-  delete this;
-}
-
-}  // namespace safe_browsing