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ximim.cpp

/*

  Copyright (c) 2003-2005 uim Project http://uim.freedesktop.org/

  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
  3. Neither the name of authors nor the names of its contributors
     may be used to endorse or promote products derived from this software
     without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  SUCH DAMAGE.
*/

// Handle IM procedure defined in XIM protocol

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <string.h>
#include <stdlib.h>
#include <map>

#include "xim.h"
#include <X11/Xutil.h>
#define NEED_EVENTS     // for declaration of xEvent
#include <X11/Xproto.h>

#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#endif

static std::map<int, XimIM *> g_ims;

class XimIM_impl : public XimIM {
public:
    XimIM_impl(Connection *c, int id);
    virtual ~XimIM_impl();
    virtual void create_ic(RxPacket *);
    virtual void destroy_ic(int);
    virtual void set_ic_focus(int icid);
    virtual void set_ic_values(RxPacket *);
    virtual void get_ic_values(RxPacket *);
    virtual void unset_ic_focus(int icid);
    virtual void forward_event(RxPacket *);
    virtual void send_sync_reply(int icid);
    virtual XimIC *get_ic_by_id(int id);
    virtual void onSendPacket();
    virtual void changeContext(const char *);

private:
    int unused_ic_id();
    void free_all_ic();
    void delete_ic(XimIC *);
    char *mEngineName;
    std::map<int, XimIC *> m_ics;
};

XimIM_impl::XimIM_impl(Connection *c, int id) : XimIM(c, id)
{
    mEngineName = strdup(mConn->getXimServer()->getIMName());
}

XimIM_impl::~XimIM_impl()
{
    free_all_ic();
    free(mEngineName);
}

void XimIM_impl::create_ic(RxPacket *p)
{
    XimIC *ic;
    int icid= unused_ic_id();

    // create compose table with the first ic
    if (icid == 1)
      create_compose_tree();

    ic = ::create_ic(mConn, p, mID, icid, mEngineName);
    if (!ic) {
      mConn->push_error_packet(mID, icid,
                         ERR_Style, "invalid im style");
      mConn->terminate();
      return;
    }
    std::pair<int, XimIC *> n(ic->get_icid(), ic);
    m_ics.insert(n);

    TxPacket *t;
    t = createTxPacket(XIM_CREATE_IC_REPLY, 0);
    t->pushC16(mID);
    t->pushC16(ic->get_icid());
    mConn->push_packet(t);
}

void XimIM_impl::destroy_ic(int icid)
{
    TxPacket *t;
    t = createTxPacket(XIM_DESTROY_IC_REPLY, 0);
    t->pushC16(mID);
    t->pushC16(icid);
    mConn->push_packet(t);
    // destruct IC
    XimIC *ic;
    ic = get_ic_by_id(icid);
    delete_ic(ic);
}

void XimIM_impl::changeContext(const char *engine)
{
    std::map<int, XimIC *>::iterator i;
    for (i = m_ics.begin(); i != m_ics.end(); i++) {
      (*i).second->changeContext(engine);
    }
    if (mEngineName)
      free(mEngineName);
    mEngineName = strdup(engine);
}

void XimIM_impl::set_ic_values(RxPacket *p)
{
    int imid, icid;
    XimIC *ic;
    p->rewind();
    imid = p->getC16();
    icid = p->getC16();
    ic = get_ic_by_id(icid);

    int atr_len;
    atr_len = p->getC16();
    p->getC16();

    unsigned char *v;
    v = (unsigned char *)alloca(atr_len);

    int i;
    for (i = 0; i < atr_len; i++) {
      v[i] = p->getC8();
    }

    ic->setICAttrs((void *)v, atr_len);

    TxPacket *t = createTxPacket(XIM_SET_IC_VALUES_REPLY, 0);
    t->pushC16(imid);
    t->pushC16(icid);
    mConn->push_packet(t);
}

void XimIM_impl::get_ic_values(RxPacket *p)
{
    int icid;
    XimIC *ic;
    p->rewind();
    p->getC16();
    icid = p->getC16();
    ic = get_ic_by_id(icid);

    int len;
    len = p->getC16();

    TxPacket *t = createTxPacket(XIM_GET_IC_VALUES_REPLY, 0);
    t->pushC16(mID);
    t->pushC16(icid);
    int i, id, l;
    l = 0;
    for (i = 0; i < len / 2; i++) {
      id = p->getC16();
      l += ic->get_ic_atr(id, 0);
      l += 4;
    }
    t->pushC16(l);
    t->pushC16(0);

    p->rewind();
    p->getC16(); // imid
    p->getC16(); // icid
    p->getC16(); // n

    for (i = 0; i < len / 2; i++) {
      id = p->getC16();
      t->pushC16(id);
      t->pushC16(ic->get_ic_atr(id, 0));
      l += ic->get_ic_atr(id, t);
    }
    mConn->push_packet(t);
}

int XimIM_impl::unused_ic_id()
{
    std::map<int, XimIC *>::iterator i;
    int max_id = 1; // Does ID of input-context start with 1?
    for (i = m_ics.begin(); i != m_ics.end(); i++) {
      if (max_id <= (*i).first)
          max_id = (*i).first + 1;
    }
    return max_id;
}

void XimIM_impl::set_ic_focus(int icid)
{
    XimIC *ic = get_ic_by_id(icid);
    if (ic)
      ic->setFocus();
}

void XimIM_impl::unset_ic_focus(int icid)
{
    XimIC *ic = get_ic_by_id(icid);
    if (ic)
      ic->unsetFocus();
}

XimIC *XimIM_impl::get_ic_by_id(int icid)
{
    std::map<int, XimIC *>::iterator it;
    it = m_ics.find(icid);
    if (it == m_ics.end())
      return 0;

    return it->second;
}

void XimIM_impl::forward_event(RxPacket *p)
{
    unsigned char *c;
    int i;
    keyEventX k;
    xEvent ev_raw;

    int imid, icid, flag;

    XimIC *ic;
    imid = p->getC16();
    icid = p->getC16();
    flag = p->getC16();
    ic = get_ic_by_id(icid);
    k.serial = p->getC16();

    // keep copy of the xEvent
    c = (unsigned char *)&ev_raw;
    for (i = 0; i < (int)sizeof(ev_raw); i++) {
      *c = p->getC8();
      c++;
    }
    
    k.ev.type = ev_raw.u.u.type & 0x7f;
    k.ev.xany.serial = (k.serial << 16) | mConn->to_hs(ev_raw.u.u.sequenceNumber);
    k.ev.xany.display = XimServer::gDpy;
    k.ev.xany.send_event = ev_raw.u.u.type > 127;

    switch (k.ev.type) {
    case KeyPress:
    case KeyRelease:
      k.ev.xkey.window =
          mConn->to_hl(ev_raw.u.keyButtonPointer.event);
      k.ev.xkey.root =
          mConn->to_hl(ev_raw.u.keyButtonPointer.root);
      k.ev.xkey.subwindow =
          mConn->to_hl(ev_raw.u.keyButtonPointer.child);
      k.ev.xkey.time =
          mConn->to_hl(ev_raw.u.keyButtonPointer.time);
      k.ev.xkey.x =
          mConn->to_hs(ev_raw.u.keyButtonPointer.eventX);
      k.ev.xkey.y =
          mConn->to_hs(ev_raw.u.keyButtonPointer.eventY);
      k.ev.xkey.x_root =
          mConn->to_hs(ev_raw.u.keyButtonPointer.rootX);
      k.ev.xkey.y_root =
          mConn->to_hs(ev_raw.u.keyButtonPointer.rootY);
      k.ev.xkey.state = mConn->to_hs(ev_raw.u.keyButtonPointer.state);
      k.ev.xkey.keycode = ev_raw.u.u.detail;
      k.ev.xkey.same_screen = ev_raw.u.keyButtonPointer.sameScreen;
      char  buf[10];
      KeySym ks;
      XLookupString(&k.ev.xkey, buf, 10, &ks, 0);
      k.state = mConn->to_hs(ev_raw.u.keyButtonPointer.state);
      k.press = (k.ev.type == KeyPress);
      k.key_sym = ks;

      if (ic)
          ic->OnKeyEvent(k);
      if (!(g_option_mask & OPT_ON_DEMAND_SYNC))
          send_sync_reply(icid);
      break;
    default:
      printf("unknown type of forwarded event.(%d)\n", k.ev.type);
      break;
    }
}

void XimIM_impl::free_all_ic()
{
    std::map<int, XimIC *>::iterator i;
    for (i = m_ics.begin(); i != m_ics.end(); i++) {
      (*i).second->unsetFocus();
      delete (*i).second;
    }
    m_ics.erase(m_ics.begin(), m_ics.end());
}

void XimIM_impl::delete_ic(XimIC *ic)
{
    std::map<int, XimIC *>::iterator it;
    for (it = m_ics.begin(); it != m_ics.end(); it++) {
      if (it->second == ic) {
          it->second->unsetFocus();
          delete it->second;
          m_ics.erase(it);
          return;
      }
    }
}

void XimIM_impl::send_sync_reply(int icid)
{
    TxPacket *t = createTxPacket(XIM_SYNC_REPLY, 0);
    t->pushC16(mID);
    t->pushC16(icid);
    mConn->push_packet(t);
}

void XimIM_impl::onSendPacket()
{
    std::map<int, XimIC *>::iterator i;
    for (i = m_ics.begin(); i != m_ics.end(); i++) {
      (*i).second->onSendPacket();
    }
}

XimIM::XimIM(Connection *c, int id)
{
    mConn = c;
    mID = id;
    mEncoding = NULL;
    mLangRegion = NULL;
    mTreeTop = NULL;
}

XimIM::~XimIM()
{
    free(mEncoding);
    free(mLangRegion);
    FreeComposeTree(mTreeTop);
}

void XimIM::FreeComposeTree(DefTree *top)
{
   if (!top)
      return;

   if (top->succession)
      FreeComposeTree(top->succession);
   if (top->next)
      FreeComposeTree(top->next);
   free(top);
}

void XimIM::set_encoding(const char *encoding)
{
    if (mEncoding)
      free(mEncoding);
    mEncoding = strdup(encoding);
}

const char *XimIM::get_encoding()
{
    return mEncoding;
}

void XimIM::set_lang_region(const char *lang_and_region)
{
    if (mLangRegion)
      free(mLangRegion);
    mLangRegion = strdup(lang_and_region);
}

const char *XimIM::get_lang_region()
{
    return mLangRegion;
}

int unused_im_id()
{
    int max_id;
    std::map<int, XimIM *>::iterator i;
    max_id = 1;
    for (i = g_ims.begin(); i != g_ims.end(); i++) {
      if ((*i).first == max_id)
          max_id = (*i).first + 1;
    }
    return max_id;
}

XimIM *create_im(Connection *c, int id)
{
    XimIM *im;
    im = new XimIM_impl(c, id);
    std::pair<int, XimIM *> p(id, im);
    g_ims.insert(p);
    return im;
}

XimIM *get_im_by_id(int id)
{
    std::map<int, XimIM *>::iterator it;
    it = g_ims.find(id);
    if (it == g_ims.end())
      return NULL;

    return it->second;
}

void close_im(int id)
{
    XimIM *im;

    im = get_im_by_id(id);
    if (im)
      delete im;

    std::map<int, XimIM *>::iterator it;
    it = g_ims.find(id);
    if (it != g_ims.end())
      g_ims.erase(it);
}
/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 */

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