chrome/browser/ui/webui/web_ui_util.h

// 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.

#ifndef CHROME_BROWSER_UI_WEBUI_WEB_UI_UTIL_H_
#define CHROME_BROWSER_UI_WEBUI_WEB_UI_UTIL_H_

#include <string>

#include "base/string_piece.h"
#include "base/values.h"
#include "ui/base/layout.h"
#include "webkit/glue/window_open_disposition.h"

class GURL;

namespace gfx {
class ImageSkia;
}

namespace web_ui_util {

// Convenience routine to convert ImageSkia object to data url
// so that it can be used in WebUI.
std::string GetImageDataUrl(const gfx::ImageSkia& image);

// Convenience routine to get data url that corresponds to given
// resource_id as an image. This function does not check if the
// resource for the |resource_id| is an image, therefore it is the
// caller's responsibility to make sure the resource is indeed an
// image. Returns empty string if a resource does not exist for given
// |resource_id|.
std::string GetImageDataUrlFromResource(int resource_id);

// Extracts a disposition from click event arguments. |args| should contain
// an integer button and booleans alt key, ctrl key, meta key, and shift key
// (in that order), starting at |start_index|.
WindowOpenDisposition GetDispositionFromClick(const ListValue* args,
                                              int start_index);

// Given a scale factor such as "1x" or "2x", sets |scale_factor| to the
// ScaleFactor enum value for this scale factor. If the scale factor could not
// be determined correctly from the string, then |scale_factor| is set to
// SCALE_FACTOR_NONE, and false is returned.
bool ParseScaleFactor(const base::StringPiece& identifier,
                      ui::ScaleFactor* scale_factor);

// Parses a URL containing some path @{scale}x. If it does not contain a scale
// factor then the default scale factor is returned.
void ParsePathAndScale(const GURL& url,
                       std::string* path,
                       ui::ScaleFactor* scale_factor);

}  // namespace web_ui_util

#endif  // CHROME_BROWSER_UI_WEBUI_WEB_UI_UTIL_H_