1.Plugin类

  在illustrator SDK中，提供了一个类，可以通过修改这个类来开发新的插件。头文件代码如下：

class Plugin
{
protected:
    SPPluginRef fPluginRef;
    char fPluginName[kMaxStringLength];//插件名称
    Suites *fSuites;//套件指针
    int fLockCount;
    SPAccessRef fPluginAccess;
    ASErr fLastError;
    long fErrorTimeout;
    ASBoolean fSupressDuplicateErrors;
    time_t fLastErrorTime;
        
public:
    Plugin(SPPluginRef pluginRef);
    Plugin() {}
    virtual ~Plugin();
    void *operator new(size_t size);
    void operator delete(void *pMem);
    
    ASBoolean SuitesAcquired() { return fSuites != nil; }
    virtual void ReportError(ASErr error, char *caller, char *selector, void *message);
    static void DefaultError(SPPluginRef ref, ASErr error);
    static ASBoolean FilterError(ASErr error);

    SPPluginRef GetPluginRef()          { return fPluginRef; }

    virtual ASErr LockPlugin(ASBoolean lock);
    static ASBoolean IsReloadMsg(char *caller, char *selector);

    virtual ASErr StartupPlugin(SPInterfaceMessage *message); 
    virtual ASErr PostStartupPlugin(); 
    virtual ASErr ShutdownPlugin(SPInterfaceMessage *message); 
    virtual ASErr UnloadPlugin(SPInterfaceMessage *message);
    virtual ASErr ReloadPlugin(SPInterfaceMessage *message);
    virtual ASErr AcquireProperty(SPPropertiesMessage *message);
    virtual ASErr ReleaseProperty(SPPropertiesMessage *message);
    virtual void GetPluginName(char *name, unsigned int maxlen);

    virtual ASBoolean Purge();
    virtual ASErr Message(char *caller, char *selector, void *message);
    virtual ASErr SetGlobal(Plugin *plugin);

    virtual ASErr AllocateSuiteTables();
    virtual ASErr FillSuiteTables();
    virtual ASErr EmptySuiteTables();

    virtual ASErr AcquireOptionalSuites();

    virtual ASErr Notify(AINotifierMessage *message);

    virtual ASErr GoAction(DoActionMessage *message);

    virtual ASErr GoMenuItem(AIMenuMessage *message);
    virtual ASErr UpdateMenuItem(AIMenuMessage *message);

    virtual ASErr GetFilterParameters(AIFilterMessage *message);
    virtual ASErr GoFilter(AIFilterMessage *message);

    virtual ASErr PluginGroupNotify(AIPluginGroupMessage *message);
    virtual ASErr PluginGroupUpdate(AIPluginGroupMessage *message);

    virtual ASErr GetFileFormatParameters(AIFileFormatMessage *message);
    virtual ASErr GoFileFormat(AIFileFormatMessage *message);
    virtual ASErr CheckFileFormat(AIFileFormatMessage *message);
    virtual ASErr FileFormatUpdate(AIUpdateFileFormatMessage *message);
    virtual ASErr SetFileFormatParameters(DoActionMessage *message);

    virtual ASErr EditTool(AIToolMessage *message);
    virtual ASErr TrackToolCursor(AIToolMessage *message);
    virtual ASErr ToolMouseDown(AIToolMessage *message);
    virtual ASErr ToolMouseDrag(AIToolMessage *message);
    virtual ASErr ToolMouseUp(AIToolMessage *message);
    virtual ASErr SelectTool(AIToolMessage *message);
    virtual ASErr DeselectTool(AIToolMessage *message);
    virtual ASErr ReselectTool(AIToolMessage *message);
    virtual ASErr DecreaseDiameter(AIToolMessage *message);
    virtual ASErr IncreaseDiameter(AIToolMessage *message);

    virtual ASErr EditLiveEffectParameters(AILiveEffectEditParamMessage * message);
    virtual ASErr GoLiveEffect(AILiveEffectGoMessage * message);
    virtual ASErr LiveEffectInterpolate(AILiveEffectInterpParamMessage * message);
    virtual ASErr LiveEffectGetInputType(AILiveEffectInputTypeMessage * message);
    virtual ASErr LiveEffectConvertColorSpace(AILiveEffectConvertColorMessage * message);
    virtual ASErr LiveEffectScaleParameters(AILiveEffectScaleParamMessage * message);
    virtual ASErr LiveEffectAdjustColors(AILiveEffectAdjustColorsMessage * message);
    virtual ASErr LiveEffectHandleMerge(AILiveEffectHandleMergeMessage * message);
    
    virtual ASErr GoTimer(AITimerMessage * message);

    virtual ASErr GoClipboard( AIClipboardMessage *message );
    virtual ASErr CanCopyClipboard( AIClipboardMessage *message );
    virtual ASErr CloneClipboard( AIClipboardMessage *message );
    virtual ASErr DisposeClipboard( AIClipboardMessage *message );

    virtual ASErr WorkspaceWrite( AIWorkspaceMessage *message );
    virtual ASErr WorkspaceRestore( AIWorkspaceMessage *message );
    virtual ASErr WorkspaceDefault( AIWorkspaceMessage *message );

private:
    static char *FindMsg(SPPluginRef ref, ASErr error, char *buf, int len);
};

2.StartupPlugin函数

  这个类里大部分是分发部分的消息处理。先查看下，SDK提供的启动函数，代码如下所示：

ASErr Plugin::StartupPlugin(SPInterfaceMessage *message)
{
    ASErr error = kNoErr;

    if (!error)
        error = SetGlobal(this);//全局函数操作（空）
        
    fSuites = new(std::nothrow) Suites;//加载模块

    if (!fSuites)
        error = kOutOfMemoryErr;
    else
    {
        error = fSuites->Error();//是否发生错误
        fSuites->InitializeRefCount();//初始化引用计数
    }
    
    if (error)
    {
        if (fSuites)
            delete fSuites;
        fSuites = nil;
    }

    if (!error)
    {
        if(!error)
            error = sSPPlugins->SetPluginName( message->d.self, fPluginName );//设置插件名称
        
        if (!error)
        {
            char notifierName[kMaxStringLength];

            sprintf(notifierName, "%s App Started Notifier", fPluginName);//应用程序启动通知
            error = sAINotifier->AddNotifier(message->d.self, notifierName, kAIApplicationStartedNotifier, NULL);
        }
    }
    

    if (!error)
        error = AllocateSuiteTables();

    if (!error)
        FillSuiteTables();

    if(!error)
        error = Plugin::LockPlugin(true);//增加引用计数

    return error;
}

  在插件的启动消息里，最主要是实现了需要使用到的系统其它模块的加载和插件的命名。

3.作者答疑

  代码长度过长，如需全部项目或有疑问，请留言。

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