| // Copyright 2015 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/zoom/page_zoom.h" |
| |
| #include <stddef.h> |
| |
| #include <algorithm> |
| #include <cmath> |
| |
| #include "base/metrics/user_metrics.h" |
| #include "components/prefs/pref_service.h" |
| #include "components/zoom/page_zoom_constants.h" |
| #include "components/zoom/zoom_controller.h" |
| #include "content/public/browser/host_zoom_map.h" |
| #include "content/public/browser/render_view_host.h" |
| #include "content/public/browser/web_contents.h" |
| #include "content/public/common/page_zoom.h" |
| |
| using base::UserMetricsAction; |
| |
| namespace { |
| |
| 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 < zoom::kPresetZoomFactorsSize; i++) { |
| double zoom_value = zoom::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; |
| } |
| |
| } // namespace anonymous |
| |
| namespace zoom { |
| |
| // static |
| std::vector<double> PageZoom::PresetZoomFactors(double custom_factor) { |
| return PresetZoomValues(PAGE_ZOOM_VALUE_TYPE_FACTOR, custom_factor); |
| } |
| |
| // static |
| std::vector<double> PageZoom::PresetZoomLevels(double custom_level) { |
| return PresetZoomValues(PAGE_ZOOM_VALUE_TYPE_LEVEL, custom_level); |
| } |
| |
| // static |
| void PageZoom::Zoom(content::WebContents* web_contents, |
| content::PageZoom zoom) { |
| zoom::ZoomController* zoom_controller = |
| zoom::ZoomController::FromWebContents(web_contents); |
| if (!zoom_controller) |
| return; |
| |
| 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); |
| web_contents->SetPageScale(1.f); |
| base::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 (auto 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); |
| base::RecordAction(UserMetricsAction("ZoomMinus")); |
| return; |
| } |
| } |
| base::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); |
| base::RecordAction(UserMetricsAction("ZoomPlus")); |
| return; |
| } |
| } |
| base::RecordAction(UserMetricsAction("ZoomPlus_AtMaximum")); |
| } |
| } |
| |
| } // namespace zoom |