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// 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
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