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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include <cmath> |
| 6 |
| 7 #include "chrome/browser/chrome_page_zoom.h" |
| 8 #include "content/public/common/page_zoom.h" |
| 9 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h" |
| 10 |
| 11 namespace chrome_page_zoom { |
| 12 |
| 13 enum PageZoomValueType { |
| 14 PAGE_ZOOM_VALUE_TYPE_FACTOR, |
| 15 PAGE_ZOOM_VALUE_TYPE_LEVEL, |
| 16 }; |
| 17 |
| 18 const double kPresetZoomFactors[] = { 0.25, 0.333, 0.5, 0.666, 0.75, 0.9, 1.0, |
| 19 1.1, 1.25, 1.5, 1.75, 2.0, 2.5, 3.0, 4.0, |
| 20 5.0 }; |
| 21 |
| 22 std::vector<double> PresetZoomValues(PageZoomValueType value_type, |
| 23 double custom_value) { |
| 24 // Generate a vector of zoom values from an array of known preset |
| 25 // factors. The values in content::kPresetZoomFactors will already be in |
| 26 // sorted order. |
| 27 std::vector<double> zoom_values; |
| 28 bool found_custom = false; |
| 29 for (size_t i = 0; i < arraysize(kPresetZoomFactors); i++) { |
| 30 double zoom_value = kPresetZoomFactors[i]; |
| 31 if (value_type == PAGE_ZOOM_VALUE_TYPE_LEVEL) |
| 32 zoom_value = WebKit::WebView::zoomFactorToZoomLevel(zoom_value); |
| 33 if (content::ZoomValuesEqual(zoom_value, custom_value)) |
| 34 found_custom = true; |
| 35 zoom_values.push_back(zoom_value); |
| 36 } |
| 37 // If the preset array did not contain the custom value, append it to the |
| 38 // vector and then sort. |
| 39 double min = value_type == PAGE_ZOOM_VALUE_TYPE_LEVEL ? |
| 40 WebKit::WebView::zoomFactorToZoomLevel(content::kMinimumZoomFactor) : |
| 41 content::kMinimumZoomFactor; |
| 42 double max = value_type == PAGE_ZOOM_VALUE_TYPE_LEVEL ? |
| 43 WebKit::WebView::zoomFactorToZoomLevel(content::kMaximumZoomFactor) : |
| 44 content::kMaximumZoomFactor; |
| 45 if (!found_custom && custom_value > min && custom_value < max) { |
| 46 zoom_values.push_back(custom_value); |
| 47 std::sort(zoom_values.begin(), zoom_values.end()); |
| 48 } |
| 49 return zoom_values; |
| 50 } |
| 51 |
| 52 std::vector<double> PresetZoomFactors(double custom_factor) { |
| 53 return PresetZoomValues(PAGE_ZOOM_VALUE_TYPE_FACTOR, custom_factor); |
| 54 } |
| 55 |
| 56 std::vector<double> PresetZoomLevels(double custom_level) { |
| 57 return PresetZoomValues(PAGE_ZOOM_VALUE_TYPE_LEVEL, custom_level); |
| 58 } |
| 59 |
| 60 } // namespace chrome_page_zoom |
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