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      1 // Copyright (c) 2012 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 #ifndef UI_WEBUI_WEB_UI_UTIL_H_
      6 #define UI_WEBUI_WEB_UI_UTIL_H_
      7 
      8 #include <string>
      9 
     10 #include "base/strings/string_piece.h"
     11 #include "base/values.h"
     12 #include "ui/base/layout.h"
     13 #include "ui/base/ui_export.h"
     14 #include "ui/base/window_open_disposition.h"
     15 
     16 class GURL;
     17 class SkBitmap;
     18 
     19 namespace webui {
     20 
     21 // Convenience routine to convert SkBitmap object to data url
     22 // so that it can be used in WebUI.
     23 UI_EXPORT std::string GetBitmapDataUrl(const SkBitmap& bitmap);
     24 
     25 // Convenience routine to get data url that corresponds to given
     26 // resource_id as a bitmap. This function does not check if the
     27 // resource for the |resource_id| is a bitmap, therefore it is the
     28 // caller's responsibility to make sure the resource is indeed a
     29 // bitmap. Returns empty string if a resource does not exist for given
     30 // |resource_id|.
     31 UI_EXPORT std::string GetBitmapDataUrlFromResource(int resource_id);
     32 
     33 // Extracts a disposition from click event arguments. |args| should contain
     34 // an integer button and booleans alt key, ctrl key, meta key, and shift key
     35 // (in that order), starting at |start_index|.
     36 UI_EXPORT WindowOpenDisposition GetDispositionFromClick(
     37     const base::ListValue* args,
     38     int start_index);
     39 
     40 // Given a scale factor such as "1x", "2x" or "1.99x", sets |scale_factor| to
     41 // the closest ScaleFactor enum value for this scale factor. If string can not
     42 // be parsed, then |scale_factor| is set to SCALE_FACTOR_100P, and false is
     43 // returned.
     44 UI_EXPORT bool ParseScaleFactor(const base::StringPiece&identifier,
     45                                 ui::ScaleFactor* scale_factor);
     46 
     47 // Parses a URL containing some path @{scale}x. If it does not contain a scale
     48 // factor then the default scale factor is returned.
     49 UI_EXPORT void ParsePathAndScale(const GURL& url,
     50                                  std::string* path,
     51                                  ui::ScaleFactor* scale_factor);
     52 
     53 // Helper function to set the font family, size, and text direction into the
     54 // given dictionary.
     55 UI_EXPORT void SetFontAndTextDirection(
     56     base::DictionaryValue* localized_strings);
     57 
     58 }  // namespace webui
     59 
     60 #endif  // UI_WEBUI_WEB_UI_UTIL_H_
     61