| // Copyright (c) 2011 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 "chrome/browser/chrome_page_zoom_constants.h" |
| #include "content/public/common/page_zoom.h" |
| #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h" |
| |
| 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 = WebKit::WebView::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 ? |
| WebKit::WebView::zoomFactorToZoomLevel(content::kMinimumZoomFactor) : |
| content::kMinimumZoomFactor; |
| double max = value_type == PAGE_ZOOM_VALUE_TYPE_LEVEL ? |
| WebKit::WebView::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); |
| } |
| |
| } // namespace chrome_page_zoom |