kdict/dict.h

   1 /* -------------------------------------------------------------
   2
   3    dict.h (part of The KDE Dictionary Client)
   4
   5    Copyright (C) 2000-2001 Christian Gebauer <gebauer@kde.org>
   6    (C) by Matthias Hölzer 1998
   7
   8    This file is distributed under the Artistic License.
   9    See LICENSE for details.
  10
  11    -------------------------------------------------------------
  12
  13    JobData          used for data transfer between Client and Interface
  14    DictAsyncClient  all network related stuff happens here in an asynchrous thread
  15    DictInterface    interface for DictAsyncClient, job management
  16
  17    -------------------------------------------------------------*/
  18
  19 #ifndef _DICT_H_
  20 #define _DICT_H_
  21
  22 #include <pthread.h>
  23 #include <qptrlist.h>
  24 #include <qsocketnotifier.h>
  25
  26 class QSocketNotifier;
  27 struct in_addr;
  28
  29
  30 //********* JobData ******************************************
  31
  32
  33 class JobData
  34 {
  35
  36 public:
  37
  38   enum QueryType {            //type of transaction
  39     TDefine=0,
  40     TGetDefinitions,
  41     TMatch,
  42     TShowDatabases,
  43     TShowDbInfo,
  44     TShowStrategies,
  45     TShowInfo,
  46     TUpdate
  47   };
  48
  49   enum ErrType {             // error codes
  50     ErrNoErr=0,
  51     ErrCommunication,        // display result!
  52     ErrTimeout,
  53     ErrBadHost,
  54     ErrConnect,              // display result!
  55     ErrRefused,
  56     ErrNotAvailable,
  57     ErrSyntax,
  58     ErrCommandNotImplemented,
  59     ErrAccessDenied,
  60     ErrAuthFailed,
  61     ErrInvalidDbStrat,
  62     ErrNoDatabases,
  63     ErrNoStrategies,
  64     ErrServerError,          // display result!
  65     ErrMsgTooLong
  66   };
  67
  68   JobData(QueryType Ntype,bool NnewServer,QString const& Nserver,int Nport,
  69           int NidleHold, int Ntimeout, int NpipeSize, QString const& Nencoding, bool NAuthEnabled,
  70           QString const& Nuser, QString const& Nsecret, unsigned int NheadLayout);
  71
  72   QueryType type;
  73   ErrType error;
  74
  75   bool canceled;
  76   int numFetched;
  77   QString result;
  78   QStringList matches;
  79
  80   QString query;
  81   QStringList defines;
  82
  83   bool newServer;
  84   QString server;
  85   int port, timeout, pipeSize, idleHold;
  86   QString encoding;
  87   bool authEnabled;
  88   QString user, secret;
  89   QStringList databases,strategies;
  90   QString strategy;
  91   unsigned int headLayout;
  92 };
  93
  94
  95 //********* DictAsyncClient ******************************************
  96
  97
  98 class DictAsyncClient
  99 {
 100
 101 public:
 102
 103   DictAsyncClient(int NfdPipeIn, int NfdPipeOut);
 104   ~DictAsyncClient();
 105
 106   static void* startThread(void* pseudoThis);
 107
 108   void insertJob(JobData *newJob);
 109   void removeJob();
 110
 111 private:
 112
 113   void waitForWork();       // main loop
 114   void define();
 115   bool getDefinitions();
 116   bool match();
 117   void showDatabases();
 118   void showDbInfo();
 119   void showStrategies();
 120   void showInfo();
 121   void update();
 122
 123   void openConnection();       // connect, handshake and authorization
 124   void closeSocket();
 125   void doQuit();               // send "quit" without timeout, without checks, close connection
 126   bool waitForRead();          // used by getNextIntoBuffer()
 127   bool waitForWrite();         // used by sendBuffer() & connect()
 128   void clearPipe();            // remove start/stop signal
 129
 130   bool sendBuffer();           // send cmdBuffer to the server
 131   bool getNextLine();          // set thisLine to next complete line of input
 132   bool nextResponseOk(int code); // reads next line and checks the response code
 133   bool getNextResponse(int &code); // reads next line and returns the response code
 134   void handleErrors();
 135
 136   void resultAppend(const char* str);
 137   void resultAppend(QString str);
 138
 139   JobData *job;
 140   char *input;
 141   QCString  cmdBuffer;
 142   const unsigned int inputSize;
 143   char *thisLine, *nextLine, *inputEnd;
 144   int fdPipeIn,fdPipeOut;      //IPC-Pipes to/from async thread
 145   int tcpSocket,timeout,idleHold;
 146   QTextCodec *codec;
 147 };
 148
 149
 150 //********* DictInterface *************************************************
 151
 152 class DictInterface : public QObject
 153 {
 154   Q_OBJECT
 155
 156 public:
 157
 158   DictInterface();
 159   ~DictInterface();
 160
 161 public slots:
 162
 163   void serverChanged();     // inform the client when server settings get changed
 164   void stop();              // cancel all pending jobs
 165
 166   void define(const QString &query);
 167   void getDefinitions(QStringList query);
 168   void match(const QString &query);
 169   void showDbInfo(const QString &db); // fetch detailed db info
 170   void showDatabases();        // fetch misc. info...
 171   void showStrategies();
 172   void showInfo();
 173   void updateServer();         // get info about databases & strategies the server knows
 174
 175 signals:
 176
 177   void infoReady();                   // updateServer done
 178   void resultReady(const QString &result, const QString &query);     // define done
 179   void matchReady(const QStringList &result);  // match done
 180   void started(const QString &message);      // Client is active now, activate indicator
 181   void stopped(const QString &message);      // Client is now halted, deactivate indicator
 182
 183 private slots:
 184
 185   void clientDone();
 186
 187 private:
 188
 189   JobData* generateQuery(JobData::QueryType type, QString query);
 190   void insertJob(JobData* job);  // insert in job list, if nesscary cancel/remove previous jobs
 191   void startClient();            // send start signal
 192   void cleanPipes();             // empty the pipes, so that notifier stops firing
 193
 194   QSocketNotifier *notifier;
 195   int fdPipeIn[2],fdPipeOut[2];    //IPC-Pipes to/from async thread
 196   pthread_t threadID;
 197   DictAsyncClient *client;
 198   QPtrList<JobData> jobList;
 199   bool newServer,clientDoneInProgress;
 200 };
 201
 202 extern DictInterface *interface;
 203
 204 #endif