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_BASE_THEME_PROVIDER_H_ 6 #define UI_BASE_THEME_PROVIDER_H_ 7 8 #include "base/basictypes.h" 9 #include "third_party/skia/include/core/SkColor.h" 10 #include "ui/base/layout.h" 11 #include "ui/base/ui_base_export.h" 12 13 #if defined(OS_MACOSX) 14 #ifdef __OBJC__ 15 @class NSColor; 16 @class NSGradient; 17 @class NSImage; 18 #else 19 class NSColor; 20 class NSGradient; 21 class NSImage; 22 #endif // __OBJC__ 23 #endif // OS_* 24 25 class SkBitmap; 26 27 namespace base { 28 class RefCountedMemory; 29 } 30 31 namespace gfx { 32 class ImageSkia; 33 } 34 35 namespace ui { 36 37 //////////////////////////////////////////////////////////////////////////////// 38 // 39 // ThemeProvider 40 // 41 // ThemeProvider is an abstract class that defines the API that should be 42 // implemented to provide bitmaps and color information for a given theme. 43 // 44 //////////////////////////////////////////////////////////////////////////////// 45 46 class UI_BASE_EXPORT ThemeProvider { 47 public: 48 virtual ~ThemeProvider(); 49 50 // Whether we're using the system theme (which may or may not be the 51 // same as the default theme). 52 virtual bool UsingSystemTheme() const = 0; 53 54 // Get the image specified by |id|. An implementation of ThemeProvider should 55 // have its own source of ids (e.g. an enum, or external resource bundle). 56 virtual gfx::ImageSkia* GetImageSkiaNamed(int id) const = 0; 57 58 // Get the color specified by |id|. 59 virtual SkColor GetColor(int id) const = 0; 60 61 // Get the property (e.g. an alignment expressed in an enum, or a width or 62 // height) specified by |id|. 63 virtual int GetDisplayProperty(int id) const = 0; 64 65 // Whether we should use the native system frame (typically Aero glass) or 66 // a custom frame. 67 virtual bool ShouldUseNativeFrame() const = 0; 68 69 // Whether or not we have a certain image. Used for when the default theme 70 // doesn't provide a certain image, but custom themes might (badges, etc). 71 virtual bool HasCustomImage(int id) const = 0; 72 73 // Reads the image data from the theme file into the specified vector. Only 74 // valid for un-themed resources and the themed IDR_THEME_NTP_* in most 75 // implementations of ThemeProvider. Returns NULL on error. 76 virtual base::RefCountedMemory* GetRawData( 77 int id, 78 ui::ScaleFactor scale_factor) const = 0; 79 80 #if defined(OS_MACOSX) && !defined(TOOLKIT_VIEWS) 81 // Gets the NSImage with the specified |id|. 82 virtual NSImage* GetNSImageNamed(int id) const = 0; 83 84 // Gets the NSImage that GetNSImageNamed (above) would return, but returns it 85 // as a pattern color. 86 virtual NSColor* GetNSImageColorNamed(int id) const = 0; 87 88 // Gets the NSColor with the specified |id|. 89 virtual NSColor* GetNSColor(int id) const = 0; 90 91 // Gets the NSColor for tinting with the specified |id|. 92 virtual NSColor* GetNSColorTint(int id) const = 0; 93 94 // Gets the NSGradient with the specified |id|. 95 virtual NSGradient* GetNSGradient(int id) const = 0; 96 #endif 97 }; 98 99 } // namespace ui 100 101 #endif // UI_BASE_THEME_PROVIDER_H_ 102