74 lines
2.6 KiB
Ruby
74 lines
2.6 KiB
Ruby
#!/usr/bin/env ruby
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require 'multi-tk'
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TkMessage.new(:text => <<EOM).pack
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This is a sample of the safe-Tk slave interpreter. \
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On the slave interpreter, 'tkoptdb.rb' demo is running.
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( NOTE:: a safe-Tk interpreter can't read options \
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from a file. Options are given by the master interpreter \
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in this script. )
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The window shown this message is a root widget of \
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the default master interpreter. The other window \
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is a toplevel widget of the master interpreter, and it \
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has a container frame of the safe-Tk slave interpreter.
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'exit' on the slave interpreter exits the slave only. \
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You can also delete the slave by the button on the toplevel widget.
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EOM
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if ENV['LANG'] =~ /^ja/
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# read Japanese resource
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ent = TkOptionDB.read_entries(File.expand_path('resource.ja',
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File.dirname(__FILE__)),
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'euc-jp')
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else
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# read English resource
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ent = TkOptionDB.read_entries(File.expand_path('resource.en',
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File.dirname(__FILE__)))
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end
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file = File.expand_path('tkoptdb.rb', File.dirname(__FILE__))
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ip = MultiTkIp.new_safeTk{
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# When a block is given to 'new_safeTk' method,
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# the block is evaluated on $SAFE==4.
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ent.each{|pat, val| Tk.tk_call('option', 'add', pat, val)}
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}
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print "ip.eval_proc{$SAFE} ==> ", ip.eval_proc{$SAFE}, "\n"
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print "\ncall 'ip.wait_on_mainloop = false'\n"
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print "If 'ip.wait_on_mainloop? == true', ",
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"when 'mainloop' is called on 'ip.eval_proc', ",
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"'ip.eval_proc' does't return while the root window exists.\n",
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"If you want to avoid that, set wait_on_mainloop to false. ",
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"Then the mainloop in the eval_proc returns soon ",
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"and the following steps are evaluated. \n",
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"If you hate the both of them, use 'ip.bg_eval_proc' or ",
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"wrap 'ip.eval_proc' by a thread.\n"
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ip.wait_on_mainloop = false
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ret = ip.eval_proc{
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# When a block is given to 'eval_proc' method,
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# the block is evaluated on the IP's current safe level.
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# So, the followings raises an exception.
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# An Exception object of the exception is returned as a
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# return value of this method.
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load file
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}
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print "\nip.eval_proc{}, which includes insecure operiation in the given block, returns an exception object: ", ret.inspect, "\n"
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print "If a proc object is given, the proc is evaluated on the safe-level which is kept on the proc :: ip.eval_proc( proc{$SAFE} ) ==> ", ip.eval_proc(proc{$SAFE}), "\n"
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safe0_cmd = Proc.new{
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print 'safe0_cmd safe-level == ', $SAFE, "\n"
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# This proc object keeps current safe-level ($SAFE==0).
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load file
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}
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ip.eval_proc{safe0_cmd.call}
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# Tk.mainloop is ignored on the slave-IP
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Tk.mainloop
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