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TkUtil::CallbackSubst


Public Class Methods

_define_attribute_aliases(p1) click to toggle source
 
               static VALUE
cbsubst_def_attr_aliases(self, tbl)
    VALUE self;
    VALUE tbl;
{
    struct cbsubst_info *inf;

    if (!RB_TYPE_P(tbl, T_HASH)) {
        rb_raise(rb_eArgError, "expected a Hash");
    }

    inf = cbsubst_get_ptr(self);

    rb_hash_foreach(tbl, each_attr_def, self);

    return rb_funcall(inf->aliases, rb_intern("update"), 1, tbl);
}
            
_get_all_subst_keys() click to toggle source
 
               static VALUE
cbsubst_get_all_subst_keys(self)
    VALUE self;
{
    struct cbsubst_info *inf;
    char *keys_buf, *keys_ptr;
    int idx;
    VALUE str, keys_str;

    inf = cbsubst_get_ptr(self);

    str = rb_str_new(0, 0);
    keys_str = rb_str_new(0, CBSUBST_TBL_MAX);
    keys_ptr = keys_buf = RSTRING_PTR(keys_str);

    for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
      if (inf->ivar[idx] == (ID) 0) continue;

      *(keys_ptr++) = (unsigned char)idx;

      str = cbsubst_append_inf_key(str, inf, idx);
    }
    rb_str_set_len(keys_str, keys_ptr - keys_buf);

    return rb_ary_new3(2, keys_str, str);
}
            
_get_extra_args_tbl() click to toggle source
 
               static VALUE
cbsubst_get_extra_args_tbl(self)
    VALUE self;
{
  return rb_ary_new();
}
            
_get_subst_key(p1) click to toggle source
 
               static VALUE
cbsubst_get_subst_key(self, str)
    VALUE self;
    VALUE str;
{
    struct cbsubst_info *inf;
    VALUE list;
    VALUE ret;
    long i, len, keylen;
    int idx;
    char *buf, *ptr;

    list = rb_funcall(cTclTkLib, ID_split_tklist, 1, str);
    Check_Type(list, T_ARRAY);
    len = RARRAY_LEN(list);

    inf = cbsubst_get_ptr(self);

    ret = rb_str_new(0, len);
    ptr = buf = RSTRING_PTR(ret);

    for(i = 0; i < len; i++) {
      VALUE keyval = RARRAY_AREF(list, i);
      const char *key = (Check_Type(keyval, T_STRING), StringValueCStr(keyval));
      if (*key == '%') {
        if (*(key + 2) == '\0') {
          /* single char */
          *(ptr++) = *(key + 1);
        } else {
          /* search longname-key */
          keylen = RSTRING_LEN(keyval) - 1;
          for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
            if (inf->keylen[idx] != keylen) continue;
            if ((unsigned char)inf->key[idx][0] != (unsigned char)*(key + 1)) continue;
            if (strncmp(inf->key[idx], key + 1, keylen)) continue;
            break;
          }
          if (idx < CBSUBST_TBL_MAX) {
            *(ptr++) = (unsigned char)idx;
          } else {
            *(ptr++) = ' ';
          }
        }
      } else {
        *(ptr++) = ' ';
      }
    }

    rb_str_set_len(ret, ptr - buf);
    return ret;
}
            
_setup_subst_table(p1, p2, p3 = v3) click to toggle source
 
               static VALUE
cbsubst_table_setup(argc, argv, self)
     int   argc;
     VALUE *argv;
     VALUE self;
{
  volatile VALUE cbsubst_obj;
  volatile VALUE key_inf;
  volatile VALUE longkey_inf;
  volatile VALUE proc_inf;
  VALUE inf, subst, name, type, ivar, proc;
  const VALUE *infp;
  ID id;
  struct cbsubst_info *subst_inf;
  long idx;
  unsigned char chr;

  /* accept (key_inf, proc_inf) or (key_inf, longkey_inf, procinf) */
  if (rb_scan_args(argc, argv, "21", &key_inf, &longkey_inf, &proc_inf) == 2) {
    proc_inf = longkey_inf;
    longkey_inf = rb_ary_new();
  }
  Check_Type(key_inf, T_ARRAY);
  Check_Type(longkey_inf, T_ARRAY);
  Check_Type(proc_inf, T_ARRAY);

  /* check the number of longkeys */
  if (RARRAY_LEN(longkey_inf) > 125 /* from 0x80 to 0xFD */) {
    rb_raise(rb_eArgError, "too many longname-key definitions");
  }

  /* init */
  cbsubst_obj = allocate_cbsubst_info(&subst_inf);

  /*
   * keys : array of [subst, type, ivar]
   *         subst ==> char code or string
   *         type  ==> char code or string
   *         ivar  ==> symbol
   */
  for(idx = 0; idx < RARRAY_LEN(key_inf); idx++) {
    inf = RARRAY_AREF(key_inf, idx);
    if (!RB_TYPE_P(inf, T_ARRAY)) continue;
    if (RARRAY_LEN(inf) < 3) continue;
    infp = RARRAY_CONST_PTR(inf);
    subst = infp[0];
    type = infp[1];
    ivar = infp[2];

    chr = NUM2CHR(subst);
    subst_inf->type[chr] = NUM2CHR(type);

    subst_inf->full_subst_length += 3;

    id = SYM2ID(ivar);
    subst_inf->ivar[chr] = rb_intern_str(rb_sprintf("@%"PRIsVALUE, rb_id2str(id)));

    rb_attr(self, id, 1, 0, Qtrue);
  }


  /*
   * longkeys : array of [name, type, ivar]
   *         name ==> longname key string
   *         type ==> char code or string
   *         ivar ==> symbol
   */
  for(idx = 0; idx < RARRAY_LEN(longkey_inf); idx++) {
    inf = RARRAY_AREF(longkey_inf, idx);
    if (!RB_TYPE_P(inf, T_ARRAY)) continue;
    if (RARRAY_LEN(inf) < 3) continue;
    infp = RARRAY_CONST_PTR(inf);
    name = infp[0];
    type = infp[1];
    ivar = infp[2];

    Check_Type(name, T_STRING);
    chr = (unsigned char)(0x80 + idx);
    subst_inf->keylen[chr] = RSTRING_LEN(name);
    subst_inf->key[chr] = strndup(RSTRING_PTR(name),
                                  RSTRING_LEN(name));
    subst_inf->type[chr] = NUM2CHR(type);

    subst_inf->full_subst_length += (subst_inf->keylen[chr] + 2);

    id = SYM2ID(ivar);
    subst_inf->ivar[chr] = rb_intern_str(rb_sprintf("@%"PRIsVALUE, rb_id2str(id)));

    rb_attr(self, id, 1, 0, Qtrue);
  }

  /*
   * procs : array of [type, proc]
   *         type  ==> char code or string
   *         proc  ==> proc/method/obj (must respond to 'call')
   */
  for(idx = 0; idx < RARRAY_LEN(proc_inf); idx++) {
    inf = RARRAY_AREF(proc_inf, idx);
    if (!RB_TYPE_P(inf, T_ARRAY)) continue;
    if (RARRAY_LEN(inf) < 2) continue;
    type = rb_ary_entry(inf, 0);
    proc = rb_ary_entry(inf, 1);
    if (RB_TYPE_P(type, T_STRING))
      type = INT2FIX(*(RSTRING_PTR(type)));
    rb_hash_aset(subst_inf->proc, type, proc);
  }

  rb_const_set(self, ID_SUBST_INFO, cbsubst_obj);

  return self;
}
            
_sym2subst(p1) click to toggle source
 
               static VALUE
cbsubst_sym_to_subst(self, sym)
    VALUE self;
    VALUE sym;
{
    struct cbsubst_info *inf;
    VALUE str;
    int idx;
    ID id;
    volatile VALUE ret;

    if (!RB_TYPE_P(sym, T_SYMBOL)) return sym;

    inf = cbsubst_get_ptr(self);

    if (!NIL_P(ret = rb_hash_aref(inf->aliases, sym))) {
        str = rb_sym2str(ret);
    } else {
        str = rb_sym2str(sym);
    }

    id = rb_intern_str(rb_sprintf("@%"PRIsVALUE, str));

    for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
      if (inf->ivar[idx] == id) break;
    }
    if (idx >= CBSUBST_TBL_MAX)  return sym;

    return cbsubst_append_inf_key(rb_str_new(0, 0), inf, idx);
}
            
inspect() click to toggle source
 
               static VALUE
cbsubst_inspect(self)
    VALUE self;
{
    return rb_str_new2("CallbackSubst");
}
            
new(*args) click to toggle source
 
               static VALUE
cbsubst_initialize(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    struct cbsubst_info *inf;
    int idx, iv_idx;

    inf = cbsubst_get_ptr(rb_obj_class(self));

    idx = 0;
    for(iv_idx = 0; iv_idx < CBSUBST_TBL_MAX; iv_idx++) {
      if ( inf->ivar[iv_idx] == (ID) 0 ) continue;
      rb_ivar_set(self, inf->ivar[iv_idx], argv[idx++]);
      if (idx >= argc) break;
    }

    return self;
}
            
ret_val(p1) click to toggle source
 
               static VALUE
cbsubst_ret_val(self, val)
    VALUE self;
    VALUE val;
{
    /* This method may be overwritten on some sub-classes.                  */
    /* This method is used for converting from ruby's callback-return-value */
    /* to tcl's value (e.g. validation procedure of entry widget).          */
    return val;
}
            
scan_args(p1, p2) click to toggle source
 
               static VALUE
cbsubst_scan_args(self, arg_key, val_ary)
    VALUE self;
    VALUE arg_key;
    VALUE val_ary;
{
    struct cbsubst_info *inf;
    long idx;
    unsigned char *keyptr = (unsigned char*)StringValueCStr(arg_key);
    long keylen = RSTRING_LEN(arg_key);
    long vallen = (Check_Type(val_ary, T_ARRAY), RARRAY_LEN(val_ary));
    unsigned char type_chr;
    volatile VALUE dst = rb_ary_new2(vallen);
    volatile VALUE proc;
    int thr_crit_bup;
    VALUE old_gc;

    thr_crit_bup = rb_thread_critical;
    rb_thread_critical = Qtrue;

    old_gc = rb_gc_disable();

    inf = cbsubst_get_ptr(self);

    for(idx = 0; idx < vallen; idx++) {
      if (idx >= keylen) {
        proc = Qnil;
      } else if (*(keyptr + idx) == ' ') {
        proc = Qnil;
      } else {
        if ((type_chr = inf->type[*(keyptr + idx)]) != 0) {
          proc = rb_hash_aref(inf->proc, INT2FIX((int)type_chr));
        } else {
          proc = Qnil;
        }
      }

      if (NIL_P(proc)) {
        rb_ary_push(dst, RARRAY_AREF(val_ary, idx));
      } else {
        rb_ary_push(dst, rb_funcall(proc, ID_call, 1,
                                    RARRAY_AREF(val_ary, idx)));
      }
    }

    if (old_gc == Qfalse) rb_gc_enable();
    rb_thread_critical = thr_crit_bup;

    return dst;
}
            
subst_arg(*args) click to toggle source
 
               static VALUE
cbsubst_get_subst_arg(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    struct cbsubst_info *inf;
    VALUE str;
    int i, idx;
    ID id;
    VALUE arg_sym, ret, result;

    inf = cbsubst_get_ptr(self);

    result = rb_str_new(0, 0);
    for(i = 0; i < argc; i++) {
        switch(TYPE(argv[i])) {
        case T_STRING:
            str = argv[i];
            arg_sym = rb_check_symbol(&str);
            if (NIL_P(arg_sym)) goto not_found;
            break;
        case T_SYMBOL:
            arg_sym = argv[i];
            str = rb_sym2str(arg_sym);
            break;
        default:
            rb_raise(rb_eArgError, "arg #%d is not a String or a Symbol", i);
        }

        if (!NIL_P(ret = rb_hash_aref(inf->aliases, arg_sym))) {
            str = rb_sym2str(ret);
        }

        ret = rb_sprintf("@%"PRIsVALUE, str);
        id = rb_check_id(&ret);
        if (!id) goto not_found;

        for(idx = 0; idx < CBSUBST_TBL_MAX; idx++) {
          if (inf->ivar[idx] == id) break;
        }
        if (idx >= CBSUBST_TBL_MAX) {
          not_found:
            rb_raise(rb_eArgError, "cannot find attribute :%"PRIsVALUE, str);
        }

        result = cbsubst_append_inf_key(result, inf, idx);
    }

    return result;
}