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883849ee32
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}
convert MOZ_OVERRIDE override
convert MOZ_FINAL final
95 lines
2.2 KiB
C++
95 lines
2.2 KiB
C++
/* vim: se cin sw=2 ts=2 et : */
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __mozilla_widget_GfxInfoCollector_h__
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#define __mozilla_widget_GfxInfoCollector_h__
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#include "mozilla/Attributes.h"
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#include "nsStringFwd.h"
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#include "js/RootingAPI.h"
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namespace mozilla {
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namespace widget {
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/* this is handy wrapper around JSAPI to make it more pleasant to use.
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* We collect the JSAPI errors and so that callers don't need to */
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class MOZ_STACK_CLASS InfoObject
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{
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friend class GfxInfoBase;
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public:
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void DefineProperty(const char *name, int value);
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void DefineProperty(const char *name, nsAString &value);
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void DefineProperty(const char *name, const char *value);
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private:
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// We need to ensure that this object lives on the stack so that GC sees it properly
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explicit InfoObject(JSContext *aCx);
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InfoObject(InfoObject&);
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JSContext *mCx;
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JS::Rooted<JSObject*> mObj;
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bool mOk;
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};
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/*
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Here's an example usage:
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class Foo {
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Foo::Foo() : mInfoCollector(this, &Foo::GetAweseomeness) {}
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void GetAwesomeness(InfoObject &obj) {
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obj.DefineProperty("awesome", mAwesome);
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}
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int mAwesome;
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GfxInfoCollector<Foo> mInfoCollector;
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}
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This will define a property on the object
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returned from calling getInfo() on a
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GfxInfo object. e.g.
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gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(Ci.nsIGfxInfo);
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info = gfxInfo.getInfo();
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if (info.awesome)
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alert(info.awesome);
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*/
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class GfxInfoCollectorBase
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{
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public:
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GfxInfoCollectorBase();
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virtual void GetInfo(InfoObject &obj) = 0;
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virtual ~GfxInfoCollectorBase();
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};
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template<class T>
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class GfxInfoCollector : public GfxInfoCollectorBase
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{
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public:
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GfxInfoCollector(T* aPointer, void (T::*aFunc)(InfoObject &obj)) : mPointer(aPointer), mFunc(aFunc) {
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}
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virtual void GetInfo(InfoObject &obj) override {
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(mPointer->*mFunc)(obj);
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}
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protected:
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T* mPointer;
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void (T::*mFunc)(InfoObject &obj);
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};
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}
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}
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#endif
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