Move ZoomObserver, ZoomController and ZoomEventManager to components/.

chrome/browser/ui/zoom/zoom_controller.cc

Index: chrome/browser/ui/zoom/zoom_controller.cc
diff --git a/chrome/browser/ui/zoom/zoom_controller.cc b/chrome/browser/ui/zoom/zoom_controller.cc
deleted file mode 100644
index 1918ce53e484e81b0eb3aca7b1fe4694d6ba273c..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/zoom/zoom_controller.cc
+++ /dev/null
@@ -1,299 +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 "chrome/browser/ui/zoom/zoom_controller.h"
-
-#include "chrome/browser/ui/sad_tab.h"
-#include "chrome/browser/ui/zoom/zoom_event_manager.h"
-#include "chrome/browser/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 "extensions/common/extension.h"
-#include "grit/theme_resources.h"
-#include "net/base/net_util.h"
-
-DEFINE_WEB_CONTENTS_USER_DATA_KEY(ZoomController);
-
-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()) {
-  content::HostZoomMap* 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());
-}
-
-int ZoomController::GetResourceForZoomLevel() const {
-  if (IsAtDefaultZoom())
-    return IDR_ZOOM_NORMAL;
-  return GetZoomLevel() > GetDefaultZoomLevel() ? IDR_ZOOM_PLUS
-                                                : IDR_ZOOM_MINUS;
-}
-
-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) {
-  // An extension did not initiate this zoom change.
-  return SetZoomLevelByExtension(zoom_level, NULL);
-}
-
-bool ZoomController::SetZoomLevelByExtension(
-    double zoom_level,
-    const scoped_refptr<const extensions::Extension>& extension) {
-  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 extension data so that |extension| 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_extension_ = extension;
-
-  // Do not actually rescale the page in manual mode.
-  if (zoom_mode_ == ZOOM_MODE_MANUAL) {
-    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);
-
-    ZoomChangedEventData zoom_change_data(web_contents(),
-                                          old_zoom_level,
-                                          zoom_level_,
-                                          zoom_mode_,
-                                          false /* can_show_bubble */);
-    FOR_EACH_OBSERVER(
-        ZoomObserver, observers_, OnZoomChanged(zoom_change_data));
-
-    last_extension_ = 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_extension_ = NULL;
-      return false;
-    }
-    std::string host =
-        net::GetHostOrSpecFromURL(content::HostZoomMap::GetURLFromEntry(entry));
-    zoom_map->SetZoomLevelForHost(host, zoom_level);
-  }
-
-  DCHECK(!event_data_);
-  last_extension_ = 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
-      zoom_map->SetTemporaryZoomLevel(
-          render_process_id, render_view_id, GetDefaultZoomLevel());
-      break;
-    }
-  }
-  // Any event data we've stored should have been consumed by this point.
-  DCHECK(!event_data_);
-
-  zoom_mode_ = new_mode;
-}
-
-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 the main frame's content has changed, the new page may have a different
-  // zoom level from the old one.
-  UpdateState(std::string());
-}
-
-void ZoomController::WebContentsDestroyed() {
-  // At this point we should no longer be sending any zoom events with this
-  // WebContents.
-  observers_.Clear();
-}
-
-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;
-    }
-  }
-
-  // The zoom bubble should not be shown for zoom changes where the host is
-  // empty.
-  bool can_show_bubble = can_show_bubble_ && !host.empty();
-
-  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();
-    zoom_change_data.can_show_bubble = can_show_bubble;
-    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();
-    ZoomChangedEventData zoom_change_data(
-        web_contents(), zoom_level, zoom_level, zoom_mode_, can_show_bubble);
-    FOR_EACH_OBSERVER(
-        ZoomObserver, observers_, OnZoomChanged(zoom_change_data));
-  }
-}