Refactor to move chrome_page_zoom functions to components/ui/zoom.

chrome/browser/chrome_page_zoom.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/browser/chrome_page_zoom.h"
-
-#include <algorithm>
-#include <cmath>
-
-#include "base/prefs/pref_service.h"
-#include "chrome/browser/chrome_page_zoom_constants.h"
-#include "components/ui/zoom/zoom_controller.h"
-#include "content/public/browser/host_zoom_map.h"
-#include "content/public/browser/render_view_host.h"
-#include "content/public/browser/user_metrics.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/common/page_zoom.h"
-#include "content/public/common/renderer_preferences.h"
-
-using base::UserMetricsAction;
-
-namespace chrome_page_zoom {
-
-enum PageZoomValueType {
-  PAGE_ZOOM_VALUE_TYPE_FACTOR,
-  PAGE_ZOOM_VALUE_TYPE_LEVEL,
-};
-
-std::vector<double> PresetZoomValues(PageZoomValueType value_type,
-                                     double custom_value) {
-  // Generate a vector of zoom values from an array of known preset
-  // factors. The values in content::kPresetZoomFactors will already be in
-  // sorted order.
-  std::vector<double> zoom_values;
-  bool found_custom = false;
-  for (size_t i = 0; i < kPresetZoomFactorsSize; i++) {
-    double zoom_value = kPresetZoomFactors[i];
-    if (value_type == PAGE_ZOOM_VALUE_TYPE_LEVEL)
-      zoom_value = content::ZoomFactorToZoomLevel(zoom_value);
-    if (content::ZoomValuesEqual(zoom_value, custom_value))
-      found_custom = true;
-    zoom_values.push_back(zoom_value);
-  }
-  // If the preset array did not contain the custom value, append it to the
-  // vector and then sort.
-  double min = value_type == PAGE_ZOOM_VALUE_TYPE_LEVEL ?
-      content::ZoomFactorToZoomLevel(content::kMinimumZoomFactor) :
-      content::kMinimumZoomFactor;
-  double max = value_type == PAGE_ZOOM_VALUE_TYPE_LEVEL ?
-      content::ZoomFactorToZoomLevel(content::kMaximumZoomFactor) :
-      content::kMaximumZoomFactor;
-  if (!found_custom && custom_value > min && custom_value < max) {
-    zoom_values.push_back(custom_value);
-    std::sort(zoom_values.begin(), zoom_values.end());
-  }
-  return zoom_values;
-}
-
-std::vector<double> PresetZoomFactors(double custom_factor) {
-  return PresetZoomValues(PAGE_ZOOM_VALUE_TYPE_FACTOR, custom_factor);
-}
-
-std::vector<double> PresetZoomLevels(double custom_level) {
-  return PresetZoomValues(PAGE_ZOOM_VALUE_TYPE_LEVEL, custom_level);
-}
-
-void Zoom(content::WebContents* web_contents, content::PageZoom zoom) {
-  ui_zoom::ZoomController* zoom_controller =
-      ui_zoom::ZoomController::FromWebContents(web_contents);
-  DCHECK(zoom_controller);
-
-  double current_zoom_level = zoom_controller->GetZoomLevel();
-  double default_zoom_level = zoom_controller->GetDefaultZoomLevel();
-
-  if (zoom == content::PAGE_ZOOM_RESET) {
-    zoom_controller->SetZoomLevel(default_zoom_level);
-    content::RecordAction(UserMetricsAction("ZoomNormal"));
-    return;
-  }
-
-  // Generate a vector of zoom levels from an array of known presets along with
-  // the default level added if necessary.
-  std::vector<double> zoom_levels = PresetZoomLevels(default_zoom_level);
-
-  if (zoom == content::PAGE_ZOOM_OUT) {
-    // Iterate through the zoom levels in reverse order to find the next
-    // lower level based on the current zoom level for this page.
-    for (std::vector<double>::reverse_iterator i = zoom_levels.rbegin();
-         i != zoom_levels.rend(); ++i) {
-      double zoom_level = *i;
-      if (content::ZoomValuesEqual(zoom_level, current_zoom_level))
-        continue;
-      if (zoom_level < current_zoom_level) {
-        zoom_controller->SetZoomLevel(zoom_level);
-        content::RecordAction(UserMetricsAction("ZoomMinus"));
-        return;
-      }
-      content::RecordAction(UserMetricsAction("ZoomMinus_AtMinimum"));
-    }
-  } else {
-    // Iterate through the zoom levels in normal order to find the next
-    // higher level based on the current zoom level for this page.
-    for (std::vector<double>::const_iterator i = zoom_levels.begin();
-         i != zoom_levels.end(); ++i) {
-      double zoom_level = *i;
-      if (content::ZoomValuesEqual(zoom_level, current_zoom_level))
-        continue;
-      if (zoom_level > current_zoom_level) {
-        zoom_controller->SetZoomLevel(zoom_level);
-        content::RecordAction(UserMetricsAction("ZoomPlus"));
-        return;
-      }
-    }
-    content::RecordAction(UserMetricsAction("ZoomPlus_AtMaximum"));
-  }
-}
-
-}  // namespace chrome_page_zoom