Remove Navigation Transitions from Chromium

content/browser/transition_request_manager.cc

-// Copyright 2014 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 "content/browser/transition_request_manager.h"
-
-#include "base/command_line.h"
-#include "base/memory/singleton.h"
-#include "base/metrics/field_trial.h"
-#include "base/strings/string_split.h"
-#include "base/strings/string_util.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/common/content_switches.h"
-#include "net/http/http_response_headers.h"
-#include "net/http/http_util.h"
-
-namespace {
-
-// Enumerate all Link: headers with the specified relation in this
-// response, and optionally returns the URL and any additional attributes of
-// each one. See EnumerateHeaders for |iter| usage.
-bool EnumerateLinkHeaders(
-    const scoped_refptr<net::HttpResponseHeaders>& headers,
-    void** iter,
-    const std::string& rel,
-    std::string* url,
-    base::StringPairs* attributes) {
-  std::string header_body;
-  bool rel_matched = false;
-  while (!rel_matched && headers->EnumerateHeader(iter, "link", &header_body)) {
-    const std::string::const_iterator begin = header_body.begin();
-    size_t url_start = header_body.find_first_of('<');
-    size_t url_end = header_body.find_first_of('>');
-    if (url_start == std::string::npos || url_end == std::string::npos ||
-        url_start > url_end) {
-      break;
-    }
-
-    if (attributes)
-      attributes->clear();
-
-    net::HttpUtil::NameValuePairsIterator param_iter(
-        begin + url_end + 1, header_body.end(), ';');
-
-    while (param_iter.GetNext()) {
-      if (LowerCaseEqualsASCII(
-              param_iter.name_begin(), param_iter.name_end(), "rel")) {
-        if (LowerCaseEqualsASCII(param_iter.value_begin(),
-                                 param_iter.value_end(),
-                                 rel.c_str())) {
-          if (url) {
-            url->assign(begin + url_start + 1, begin + url_end);
-          }
-          rel_matched = true;
-        } else {
-          break;
-        }
-      } else if (attributes) {
-        std::string attribute_name(param_iter.name_begin(),
-                                   param_iter.name_end());
-        std::string attribute_value(param_iter.value_begin(),
-                                    param_iter.value_end());
-        attributes->push_back(std::make_pair(attribute_name, attribute_value));
-      }
-    }
-  }
-
-  if (!rel_matched && attributes) {
-    attributes->clear();
-  }
-
-  return rel_matched;
-}
-
-}  // namespace
-
-namespace content {
-
-TransitionLayerData::TransitionLayerData() {
-}
-
-TransitionLayerData::~TransitionLayerData() {
-}
-
-TransitionRequestManager::TransitionRequestData::AllowedEntry::AllowedEntry(
-    const std::string& allowed_destination_host_pattern,
-    const std::string& css_selector,
-    const std::string& markup,
-    const std::vector<TransitionElement>& elements)
-    : allowed_destination_host_pattern(allowed_destination_host_pattern),
-      css_selector(css_selector),
-      markup(markup),
-      elements(elements) {
-}
-
-TransitionRequestManager::TransitionRequestData::AllowedEntry::~AllowedEntry() {
-}
-
-void TransitionRequestManager::ParseTransitionStylesheetsFromHeaders(
-    const scoped_refptr<net::HttpResponseHeaders>& headers,
-    std::vector<GURL>& entering_stylesheets,
-    const GURL& resolve_address) {
-  if (headers.get() == NULL)
-    return;
-
-  std::string transition_stylesheet;
-  base::StringPairs attributes;
-  void* header_iter = NULL;
-  while (EnumerateLinkHeaders(headers,
-                              &header_iter,
-                              "transition-entering-stylesheet",
-                              &transition_stylesheet,
-                              &attributes)) {
-    GURL stylesheet_url = resolve_address.Resolve(transition_stylesheet);
-    if (stylesheet_url.is_valid())
-      entering_stylesheets.push_back(stylesheet_url);
-  }
-}
-
-TransitionRequestManager::TransitionRequestData::TransitionRequestData() {
-}
-
-TransitionRequestManager::TransitionRequestData::~TransitionRequestData() {
-}
-
-void TransitionRequestManager::TransitionRequestData::AddEntry(
-    const std::string& allowed_destination_host_pattern,
-    const std::string& css_selector,
-    const std::string& markup,
-    const std::vector<TransitionElement>& elements) {
-  allowed_entries_.push_back(AllowedEntry(allowed_destination_host_pattern,
-                                          css_selector,
-                                          markup,
-                                          elements));
-}
-
-bool TransitionRequestManager::TransitionRequestData::FindEntry(
-    const GURL& request_url,
-    TransitionLayerData* transition_data) {
-  DCHECK(!allowed_entries_.empty());
-  CHECK(transition_data);
-  CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
-            switches::kEnableExperimentalWebPlatformFeatures) ||
-        base::FieldTrialList::FindFullName("NavigationTransitions") ==
-            "Enabled");
-
-  for (const AllowedEntry& allowed_entry : allowed_entries_) {
-    // Note: This is a small subset of the CSP source-list standard; once the
-    // full CSP support is moved from the renderer to the browser, we should
-    // use that instead.
-    bool is_valid = (allowed_entry.allowed_destination_host_pattern == "*");
-    if (!is_valid) {
-      GURL allowed_host(allowed_entry.allowed_destination_host_pattern);
-      if (allowed_host.is_valid() &&
-          (allowed_host.GetOrigin() == request_url.GetOrigin())) {
-        is_valid = true;
-      }
-    }
-
-    if (is_valid) {
-      transition_data->markup = allowed_entry.markup;
-      transition_data->css_selector = allowed_entry.css_selector;
-      transition_data->elements = allowed_entry.elements;
-      return true;
-    }
-  }
-
-  return false;
-}
-
-bool TransitionRequestManager::GetPendingTransitionRequest(
-    int render_process_id,
-    int render_frame_id,
-    const GURL& request_url,
-    TransitionLayerData* transition_data) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  DCHECK(transition_data);
-  std::pair<int, int> key(render_process_id, render_frame_id);
-  RenderFrameRequestDataMap::iterator iter =
-      pending_transition_frames_.find(key);
-  return iter != pending_transition_frames_.end() &&
-      iter->second.FindEntry(request_url, transition_data);
-}
-
-void TransitionRequestManager::AddPendingTransitionRequestData(
-    int render_process_id,
-    int render_frame_id,
-    const std::string& allowed_destination_host_pattern,
-    const std::string& css_selector,
-    const std::string& markup,
-    const std::vector<TransitionElement>& elements) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-
-  std::pair<int, int> key(render_process_id, render_frame_id);
-  pending_transition_frames_[key].AddEntry(
-      allowed_destination_host_pattern, css_selector, markup, elements);
-}
-
-void TransitionRequestManager::AddPendingTransitionRequestDataForTesting(
-    int render_process_id,
-    int render_frame_id) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-
-  std::pair<int, int> key(render_process_id, render_frame_id);
-  pending_transition_frames_[key].AddEntry(
-      "*", /* allowed_destination_host_pattern */
-      "", /* css_selector */
-      "", /* markup */
-      std::vector<TransitionElement>()); /* elements */
-}
-
-void TransitionRequestManager::ClearPendingTransitionRequestData(
-    int render_process_id, int render_frame_id) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  std::pair<int, int> key(render_process_id, render_frame_id);
-  pending_transition_frames_.erase(key);
-}
-
-TransitionRequestManager::TransitionRequestManager() {
-}
-
-TransitionRequestManager::~TransitionRequestManager() {
-}
-
-// static
-TransitionRequestManager* TransitionRequestManager::GetInstance() {
-  return Singleton<TransitionRequestManager>::get();
-}
-
-}  // namespace content