1 files changed, 120 insertions, 0 deletions
diff --git a/ui/base/theme_provider.h b/ui/base/theme_provider.h
new file mode 100644
index 0000000..43aa28f
--- /dev/null
+++ b/ui/base/theme_provider.h
@@ -0,0 +1,120 @@
+// 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.
+
+#ifndef UI_BASE_THEME_PROVIDER_H_
+#define UI_BASE_THEME_PROVIDER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "third_party/skia/include/core/SkColor.h"
+
+#if defined(OS_MACOSX)
+#ifdef __OBJC__
+@class NSColor;
+@class NSGradient;
+@class NSImage;
+#else
+class NSColor;
+class NSGradient;
+class NSImage;
+#endif  // __OBJC__
+#elif !defined(OS_WIN)
+typedef struct _GdkColor GdkColor;
+typedef struct _GdkPixbuf GdkPixbuf;
+#endif  // OS_*
+
+class Profile;
+class RefCountedMemory;
+class SkBitmap;
+
+namespace ui {
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ThemeProvider
+//
+//   ThemeProvider is an abstract class that defines the API that should be
+//   implemented to provide bitmaps and color information for a given theme.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class ThemeProvider {
+ public:
+  virtual ~ThemeProvider();
+
+  // TODO(beng): This dependency is horrible!
+  // Initialize the provider with the passed in profile.
+  virtual void Init(Profile* profile) = 0;
+
+  // Get the bitmap specified by |id|. An implementation of ThemeProvider should
+  // have its own source of ids (e.g. an enum, or external resource bundle).
+  virtual SkBitmap* GetBitmapNamed(int id) const = 0;
+
+  // Get the color specified by |id|.
+  virtual SkColor GetColor(int id) const = 0;
+
+  // Get the property (e.g. an alignment expressed in an enum, or a width or
+  // height) specified by |id|.
+  virtual bool GetDisplayProperty(int id, int* result) const = 0;
+
+  // Whether we should use the native system frame (typically Aero glass) or
+  // a custom frame.
+  virtual bool ShouldUseNativeFrame() const = 0;
+
+  // Whether or not we have a certain image. Used for when the default theme
+  // doesn't provide a certain image, but custom themes might (badges, etc).
+  virtual bool HasCustomImage(int id) const = 0;
+
+  // Reads the image data from the theme file into the specified vector. Only
+  // valid for un-themed resources and the themed IDR_THEME_NTP_* in most
+  // implementations of ThemeProvider. Returns NULL on error.
+  virtual RefCountedMemory* GetRawData(int id) const = 0;
+
+#if defined(OS_MACOSX)
+  // Gets the NSImage with the specified |id|.
+  //
+  // The bitmap is not assumed to exist. If a theme does not provide an image,
+  // if |allow_default| is true, then the default image will be returned, else
+  // this function will return nil.
+  virtual NSImage* GetNSImageNamed(int id, bool allow_default) const = 0;
+
+  // Gets the NSImage that GetNSImageNamed (above) would return, but returns it
+  // as a pattern color.
+  virtual NSColor* GetNSImageColorNamed(int id, bool allow_default) const = 0;
+
+  // Gets the NSColor with the specified |id|.
+  //
+  // The color is not assumed to exist. If a theme does not provide an color, if
+  // |allow_default| is true, then the default color will be returned, else this
+  // function will return nil.
+  virtual NSColor* GetNSColor(int id, bool allow_default) const = 0;
+
+  // Gets the NSColor for tinting with the specified |id|.
+  //
+  // The tint is not assumed to exist. If a theme does not provide a tint with
+  // that id, if |allow_default| is true, then the default tint will be
+  // returned, else this function will return nil.
+  virtual NSColor* GetNSColorTint(int id, bool allow_default) const = 0;
+
+  // Gets the NSGradient with the specified |id|.
+  virtual NSGradient* GetNSGradient(int id) const = 0;
+#elif defined(OS_POSIX) && !defined(TOOLKIT_VIEWS)
+  // Gets the GdkPixbuf with the specified |id|.  Returns a pointer to a shared
+  // instance of the GdkPixbuf.  This shared GdkPixbuf is owned by the theme
+  // provider and should not be freed.
+  //
+  // The bitmap is assumed to exist. This function will log in release, and
+  // assert in debug mode if it does not. On failure, this will return a
+  // pointer to a shared empty placeholder bitmap so it will be visible what
+  // is missing.
+  virtual GdkPixbuf* GetPixbufNamed(int id) const = 0;
+
+  // As above, but flips it in RTL locales.
+  virtual GdkPixbuf* GetRTLEnabledPixbufNamed(int id) const = 0;
+#endif
+};
+
+}  // namespace ui
+
+#endif  // UI_BASE_THEME_PROVIDER_H_