The Tor Browser / file comparison
comparison: widget/xpwidgets/GfxInfoCollector.h
widget/xpwidgets/GfxInfoCollector.h
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:e53c4f1447c6 |
|---|---|
| 1 /* vim: se cin sw=2 ts=2 et : */ | |
| 2 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 3 * | |
| 4 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 #ifndef __mozilla_widget_GfxInfoCollector_h__ | |
| 9 #define __mozilla_widget_GfxInfoCollector_h__ | |
| 10 | |
| 11 #include "mozilla/Attributes.h" | |
| 12 #include "nsStringFwd.h" | |
| 13 #include "js/RootingAPI.h" | |
| 14 | |
| 15 namespace mozilla { | |
| 16 namespace widget { | |
| 17 | |
| 18 | |
| 19 /* this is handy wrapper around JSAPI to make it more pleasant to use. | |
| 20 * We collect the JSAPI errors and so that callers don't need to */ | |
| 21 class MOZ_STACK_CLASS InfoObject | |
| 22 { | |
| 23 friend class GfxInfoBase; | |
| 24 | |
| 25 public: | |
| 26 void DefineProperty(const char *name, int value); | |
| 27 void DefineProperty(const char *name, nsAString &value); | |
| 28 void DefineProperty(const char *name, const char *value); | |
| 29 | |
| 30 private: | |
| 31 // We need to ensure that this object lives on the stack so that GC sees it properly | |
| 32 InfoObject(JSContext *aCx); | |
| 33 InfoObject(InfoObject&); | |
| 34 | |
| 35 JSContext *mCx; | |
| 36 JS::Rooted<JSObject*> mObj; | |
| 37 bool mOk; | |
| 38 }; | |
| 39 | |
| 40 /* | |
| 41 | |
| 42 Here's an example usage: | |
| 43 | |
| 44 class Foo { | |
| 45 Foo::Foo() : mInfoCollector(this, &Foo::GetAweseomeness) {} | |
| 46 | |
| 47 void GetAwesomeness(InfoObject &obj) { | |
| 48 obj.DefineProperty("awesome", mAwesome); | |
| 49 } | |
| 50 | |
| 51 int mAwesome; | |
| 52 | |
| 53 GfxInfoCollector<Foo> mInfoCollector; | |
| 54 } | |
| 55 | |
| 56 This will define a property on the object | |
| 57 returned from calling getInfo() on a | |
| 58 GfxInfo object. e.g. | |
| 59 | |
| 60 gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(Ci.nsIGfxInfo); | |
| 61 info = gfxInfo.getInfo(); | |
| 62 if (info.awesome) | |
| 63 alert(info.awesome); | |
| 64 | |
| 65 */ | |
| 66 | |
| 67 class GfxInfoCollectorBase | |
| 68 { | |
| 69 public: | |
| 70 GfxInfoCollectorBase(); | |
| 71 virtual void GetInfo(InfoObject &obj) = 0; | |
| 72 virtual ~GfxInfoCollectorBase(); | |
| 73 }; | |
| 74 | |
| 75 template<class T> | |
| 76 class GfxInfoCollector : public GfxInfoCollectorBase | |
| 77 { | |
| 78 public: | |
| 79 GfxInfoCollector(T* aPointer, void (T::*aFunc)(InfoObject &obj)) : mPointer(aPointer), mFunc(aFunc) { | |
| 80 } | |
| 81 virtual void GetInfo(InfoObject &obj) { | |
| 82 (mPointer->*mFunc)(obj); | |
| 83 } | |
| 84 | |
| 85 protected: | |
| 86 T* mPointer; | |
| 87 void (T::*mFunc)(InfoObject &obj); | |
| 88 | |
| 89 }; | |
| 90 | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 #endif |
