Move //components/ui/zoom to top-level under //components

components/ui/zoom/zoom_controller.cc

Index: components/ui/zoom/zoom_controller.cc
diff --git a/components/ui/zoom/zoom_controller.cc b/components/ui/zoom/zoom_controller.cc
deleted file mode 100644
index 18e58cdc389dcf2c92a929de5d49fb8d373a11d8..0000000000000000000000000000000000000000
--- a/components/ui/zoom/zoom_controller.cc
+++ /dev/null
@@ -1,376 +0,0 @@
-// 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 "components/ui/zoom/zoom_controller.h"
-
-#include "components/ui/zoom/zoom_event_manager.h"
-#include "components/ui/zoom/zoom_observer.h"
-#include "content/public/browser/host_zoom_map.h"
-#include "content/public/browser/navigation_details.h"
-#include "content/public/browser/navigation_entry.h"
-#include "content/public/browser/render_process_host.h"
-#include "content/public/browser/render_view_host.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/common/page_type.h"
-#include "content/public/common/page_zoom.h"
-#include "net/base/url_util.h"
-
-DEFINE_WEB_CONTENTS_USER_DATA_KEY(ui_zoom::ZoomController);
-
-namespace ui_zoom {
-
-double ZoomController::GetZoomLevelForWebContents(
-    const content::WebContents* web_contents) {
-  if (!web_contents)
-    return 0.0;
-
-  auto zoom_controller = FromWebContents(web_contents);
-  if (zoom_controller)
-    return zoom_controller->GetZoomLevel();
-
-  return content::HostZoomMap::GetZoomLevel(web_contents);
-}
-
-ZoomController::ZoomController(content::WebContents* web_contents)
-    : content::WebContentsObserver(web_contents),
-      can_show_bubble_(true),
-      zoom_mode_(ZOOM_MODE_DEFAULT),
-      zoom_level_(1.0),
-      browser_context_(web_contents->GetBrowserContext()) {
-  host_zoom_map_ = content::HostZoomMap::GetForWebContents(web_contents);
-  zoom_level_ = host_zoom_map_->GetDefaultZoomLevel();
-
-  zoom_subscription_ = host_zoom_map_->AddZoomLevelChangedCallback(
-      base::Bind(&ZoomController::OnZoomLevelChanged, base::Unretained(this)));
-
-  UpdateState(std::string());
-}
-
-ZoomController::~ZoomController() {
-}
-
-bool ZoomController::IsAtDefaultZoom() const {
-  return content::ZoomValuesEqual(GetZoomLevel(), GetDefaultZoomLevel());
-}
-
-ZoomController::RelativeZoom ZoomController::GetZoomRelativeToDefault() const {
-  double current_level = GetZoomLevel();
-  double default_level = GetDefaultZoomLevel();
-  if (content::ZoomValuesEqual(current_level, default_level))
-    return ZOOM_AT_DEFAULT_ZOOM;
-  else if (current_level > default_level)
-    return ZOOM_ABOVE_DEFAULT_ZOOM;
-  return ZOOM_BELOW_DEFAULT_ZOOM;
-}
-
-void ZoomController::AddObserver(ZoomObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void ZoomController::RemoveObserver(ZoomObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-double ZoomController::GetZoomLevel() const {
-  return zoom_mode_ == ZOOM_MODE_MANUAL
-             ? zoom_level_
-             : content::HostZoomMap::GetZoomLevel(web_contents());
-}
-
-int ZoomController::GetZoomPercent() const {
-  double zoom_factor = content::ZoomLevelToZoomFactor(GetZoomLevel());
-  // Round double for return.
-  return static_cast<int>(zoom_factor * 100 + 0.5);
-}
-
-bool ZoomController::SetZoomLevel(double zoom_level) {
-  // A client did not initiate this zoom change.
-  return SetZoomLevelByClient(zoom_level, NULL);
-}
-
-bool ZoomController::SetZoomLevelByClient(
-    double zoom_level,
-    const scoped_refptr<const ZoomRequestClient>& client) {
-  content::NavigationEntry* entry =
-      web_contents()->GetController().GetLastCommittedEntry();
-  // Cannot zoom in disabled mode. Also, don't allow changing zoom level on
-  // a crashed tab, an error page or an interstitial page.
-  if (zoom_mode_ == ZOOM_MODE_DISABLED ||
-      !web_contents()->GetRenderViewHost()->IsRenderViewLive())
-    return false;
-
-  // Store client data so the |client| can be attributed when the zoom
-  // change completes. We expect that by the time this function returns that
-  // any observers that require this information will have requested it.
-  last_client_ = client;
-
-  // Do not actually rescale the page in manual mode.
-  if (zoom_mode_ == ZOOM_MODE_MANUAL) {
-    // If the zoom level hasn't changed, early out to avoid sending an event.
-    if (content::ZoomValuesEqual(zoom_level_, zoom_level))
-      return true;
-
-    double old_zoom_level = zoom_level_;
-    zoom_level_ = zoom_level;
-
-    // TODO(wjmaclean) Do we care about filling in host/scheme here?
-    content::HostZoomMap::ZoomLevelChange change;
-    change.mode = content::HostZoomMap::ZOOM_CHANGED_TEMPORARY_ZOOM;
-    change.zoom_level = zoom_level;
-    ZoomEventManager::GetForBrowserContext(browser_context_)
-        ->OnZoomLevelChanged(change);
-
-    bool can_show_bubble = can_show_bubble_;
-    if (client && client->ShouldSuppressBubble())
-      can_show_bubble = false;
-
-    ZoomChangedEventData zoom_change_data(web_contents(), old_zoom_level,
-                                          zoom_level_, zoom_mode_,
-                                          can_show_bubble);
-    FOR_EACH_OBSERVER(ZoomObserver, observers_,
-                      OnZoomChanged(zoom_change_data));
-
-    last_client_ = NULL;
-    return true;
-  }
-
-  content::HostZoomMap* zoom_map =
-      content::HostZoomMap::GetForWebContents(web_contents());
-  DCHECK(zoom_map);
-  DCHECK(!event_data_);
-  event_data_.reset(new ZoomChangedEventData(web_contents(), GetZoomLevel(),
-                                             zoom_level, zoom_mode_,
-                                             false /* can_show_bubble */));
-  int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
-  int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
-  if (zoom_mode_ == ZOOM_MODE_ISOLATED ||
-      zoom_map->UsesTemporaryZoomLevel(render_process_id, render_view_id)) {
-    zoom_map->SetTemporaryZoomLevel(render_process_id, render_view_id,
-                                    zoom_level);
-  } else {
-    if (!entry) {
-      last_client_ = NULL;
-      // If we exit without triggering an update, we should clear event_data_,
-      // else we may later trigger a DCHECK(event_data_).
-      event_data_.reset();
-      return false;
-    }
-    std::string host =
-        net::GetHostOrSpecFromURL(content::HostZoomMap::GetURLFromEntry(entry));
-    zoom_map->SetZoomLevelForHost(host, zoom_level);
-  }
-
-  DCHECK(!event_data_);
-  last_client_ = NULL;
-  return true;
-}
-
-void ZoomController::SetZoomMode(ZoomMode new_mode) {
-  if (new_mode == zoom_mode_)
-    return;
-
-  content::HostZoomMap* zoom_map =
-      content::HostZoomMap::GetForWebContents(web_contents());
-  DCHECK(zoom_map);
-  int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
-  int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
-  double original_zoom_level = GetZoomLevel();
-
-  DCHECK(!event_data_);
-  event_data_.reset(new ZoomChangedEventData(
-      web_contents(), original_zoom_level, original_zoom_level, new_mode,
-      new_mode != ZOOM_MODE_DEFAULT));
-
-  switch (new_mode) {
-    case ZOOM_MODE_DEFAULT: {
-      content::NavigationEntry* entry =
-          web_contents()->GetController().GetLastCommittedEntry();
-
-      if (entry) {
-        GURL url = content::HostZoomMap::GetURLFromEntry(entry);
-        std::string host = net::GetHostOrSpecFromURL(url);
-
-        if (zoom_map->HasZoomLevel(url.scheme(), host)) {
-          // If there are other tabs with the same origin, then set this tab's
-          // zoom level to match theirs. The temporary zoom level will be
-          // cleared below, but this call will make sure this tab re-draws at
-          // the correct zoom level.
-          double origin_zoom_level =
-              zoom_map->GetZoomLevelForHostAndScheme(url.scheme(), host);
-          event_data_->new_zoom_level = origin_zoom_level;
-          zoom_map->SetTemporaryZoomLevel(render_process_id, render_view_id,
-                                          origin_zoom_level);
-        } else {
-          // The host will need a level prior to removing the temporary level.
-          // We don't want the zoom level to change just because we entered
-          // default mode.
-          zoom_map->SetZoomLevelForHost(host, original_zoom_level);
-        }
-      }
-      // Remove per-tab zoom data for this tab. No event callback expected.
-      zoom_map->ClearTemporaryZoomLevel(render_process_id, render_view_id);
-      break;
-    }
-    case ZOOM_MODE_ISOLATED: {
-      // Unless the zoom mode was |ZOOM_MODE_DISABLED| before this call, the
-      // page needs an initial isolated zoom back to the same level it was at
-      // in the other mode.
-      if (zoom_mode_ != ZOOM_MODE_DISABLED) {
-        zoom_map->SetTemporaryZoomLevel(render_process_id, render_view_id,
-                                        original_zoom_level);
-      } else {
-        // When we don't call any HostZoomMap set functions, we send the event
-        // manually.
-        FOR_EACH_OBSERVER(ZoomObserver, observers_,
-                          OnZoomChanged(*event_data_));
-        event_data_.reset();
-      }
-      break;
-    }
-    case ZOOM_MODE_MANUAL: {
-      // Unless the zoom mode was |ZOOM_MODE_DISABLED| before this call, the
-      // page needs to be resized to the default zoom. While in manual mode,
-      // the zoom level is handled independently.
-      if (zoom_mode_ != ZOOM_MODE_DISABLED) {
-        zoom_map->SetTemporaryZoomLevel(render_process_id, render_view_id,
-                                        GetDefaultZoomLevel());
-        zoom_level_ = original_zoom_level;
-      } else {
-        // When we don't call any HostZoomMap set functions, we send the event
-        // manually.
-        FOR_EACH_OBSERVER(ZoomObserver, observers_,
-                          OnZoomChanged(*event_data_));
-        event_data_.reset();
-      }
-      break;
-    }
-    case ZOOM_MODE_DISABLED: {
-      // The page needs to be zoomed back to default before disabling the zoom
-      double new_zoom_level = GetDefaultZoomLevel();
-      event_data_->new_zoom_level = new_zoom_level;
-      zoom_map->SetTemporaryZoomLevel(render_process_id, render_view_id,
-                                      new_zoom_level);
-      break;
-    }
-  }
-  // Any event data we've stored should have been consumed by this point.
-  DCHECK(!event_data_);
-
-  zoom_mode_ = new_mode;
-}
-
-void ZoomController::ResetZoomModeOnNavigationIfNeeded(const GURL& url) {
-  if (zoom_mode_ != ZOOM_MODE_ISOLATED && zoom_mode_ != ZOOM_MODE_MANUAL)
-    return;
-
-  int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
-  int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
-  content::HostZoomMap* zoom_map =
-    content::HostZoomMap::GetForWebContents(web_contents());
-  zoom_level_ = zoom_map->GetDefaultZoomLevel();
-  double old_zoom_level = zoom_map->GetZoomLevel(web_contents());
-  double new_zoom_level = zoom_map->GetZoomLevelForHostAndScheme(
-      url.scheme(), net::GetHostOrSpecFromURL(url));
-  event_data_.reset(new ZoomChangedEventData(
-      web_contents(), old_zoom_level, new_zoom_level, ZOOM_MODE_DEFAULT,
-      false /* can_show_bubble */));
-  // The call to ClearTemporaryZoomLevel() doesn't generate any events from
-  // HostZoomMap, but the call to UpdateState() at the end of this function
-  // will notify our observers.
-  // Note: it's possible the render_process/view ids have disappeared (e.g.
-  // if we navigated to a new origin), but this won't cause a problem in the
-  // call below.
-  zoom_map->ClearTemporaryZoomLevel(render_process_id, render_view_id);
-  zoom_mode_ = ZOOM_MODE_DEFAULT;
-}
-
-void ZoomController::DidNavigateMainFrame(
-    const content::LoadCommittedDetails& details,
-    const content::FrameNavigateParams& params) {
-  if (details.entry && details.entry->GetPageType() == content::PAGE_TYPE_ERROR)
-    content::HostZoomMap::SendErrorPageZoomLevelRefresh(web_contents());
-
-  if (!details.is_in_page)
-    ResetZoomModeOnNavigationIfNeeded(params.url);
-
-  // If the main frame's content has changed, the new page may have a different
-  // zoom level from the old one.
-  UpdateState(std::string());
-  DCHECK(!event_data_);
-}
-
-void ZoomController::WebContentsDestroyed() {
-  // At this point we should no longer be sending any zoom events with this
-  // WebContents.
-  observers_.Clear();
-}
-
-void ZoomController::RenderFrameHostChanged(
-    content::RenderFrameHost* old_host,
-    content::RenderFrameHost* new_host) {
-  // If our associated HostZoomMap changes, update our event subscription.
-  content::HostZoomMap* new_host_zoom_map =
-      content::HostZoomMap::GetForWebContents(web_contents());
-  if (new_host_zoom_map == host_zoom_map_)
-    return;
-
-  host_zoom_map_ = new_host_zoom_map;
-  zoom_subscription_ = host_zoom_map_->AddZoomLevelChangedCallback(
-      base::Bind(&ZoomController::OnZoomLevelChanged, base::Unretained(this)));
-}
-
-void ZoomController::OnZoomLevelChanged(
-    const content::HostZoomMap::ZoomLevelChange& change) {
-  UpdateState(change.host);
-}
-
-void ZoomController::UpdateState(const std::string& host) {
-  // If |host| is empty, all observers should be updated.
-  if (!host.empty()) {
-    // Use the navigation entry's URL instead of the WebContents' so virtual
-    // URLs work (e.g. chrome://settings). http://crbug.com/153950
-    content::NavigationEntry* entry =
-        web_contents()->GetController().GetLastCommittedEntry();
-    if (!entry ||
-        host != net::GetHostOrSpecFromURL(
-                    content::HostZoomMap::GetURLFromEntry(entry))) {
-      return;
-    }
-  }
-
-  if (event_data_) {
-    // For state changes initiated within the ZoomController, information about
-    // the change should be sent.
-    ZoomChangedEventData zoom_change_data = *event_data_;
-    event_data_.reset();
-    // The zoom bubble should not be shown for zoom changes where the host
-    // is empty.
-    zoom_change_data.can_show_bubble = can_show_bubble_ && !host.empty();
-    FOR_EACH_OBSERVER(ZoomObserver, observers_,
-                      OnZoomChanged(zoom_change_data));
-  } else {
-    // TODO(wjmaclean) Should we consider having HostZoomMap send both old and
-    // new zoom levels here?
-    double zoom_level = GetZoomLevel();
-    // We never show a zoom bubble for an event we didn't generate.
-    ZoomChangedEventData zoom_change_data(web_contents(), zoom_level,
-                                          zoom_level, zoom_mode_,
-                                          false /* can_show_bubble */);
-    FOR_EACH_OBSERVER(ZoomObserver, observers_,
-                      OnZoomChanged(zoom_change_data));
-  }
-}
-
-void ZoomController::SetPageScaleFactorIsOneForTesting(bool is_one) {
-  int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
-  int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
-  host_zoom_map_->SetPageScaleFactorIsOneForView(
-      render_process_id, render_view_id, is_one);
-}
-
-bool ZoomController::PageScaleFactorIsOne() const {
-  return content::HostZoomMap::PageScaleFactorIsOne(web_contents());
-}
-
-}  // namespace ui_zoom