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Extending the action bar - passing arguments to actions
Submitted by irumat on Wednesday, 31 March, 2010 - 22:46
Hi all,

Long time reader, first time poster. I was thinking of adding a (probably awful) hack to the ActionBar to see if I could have the action bar do something like:

<ctrl+enter>action_name my_arg<enter>

For example, it could be "my.save.as filename.bak". Ofcourse, it would be a big effort to have this work for the built-in jEdit actions. But one could, perhaps, write a macro that took an argument like that. It would replace having to show a dialog box to collect simple input.

Any thoughts? Do you think it is possible and worth pursuing?

Cheers,
Irumat
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Okay...something that I can build on. Just sharing!
by irumat on Thu, 01/04/2010 - 13:41
Hi all,

I had a go at hacking something that let me do the above, just for my own personal BeanShell macro. Someone might find it useful.

I modified org/gjt/sp/jedit/gui/ActionBar.java, the invoke() method. Instead of "final String finalCmd = cmd;" we have:

final String finalCmd;

// See if finalCmd is my custom action
if (cmd.startsWith("mycmd")) {
	// then the second part of the command is what to pass
	// to the 'mycmd' beanshell script
	int index = cmd.indexOf(' ');
	String cmdValue = cmd.substring(index + 1).trim();
	try {
	    BeanShell.getNameSpace().setVariable("mycmd_command", cmdValue);
	} catch (Exception e) {
		System.out.println("Couldn't set second part of command!");
	}
	finalCmd = "mycmd";
} else {
	finalCmd = cmd;
}


Code before and after this line in invoke() method is as before. I then have a BeanShell macro "mycmd.bsh":

RunMyCommand()
{
String command = BeanShell.getNameSpace().getVariable("mycmd_command");
BeanShell.getNameSpace().unsetVariable("mycmd_command");
	
// Fix action history
HistoryModel.getModel("action").removeElement("mycmd"); // by default, jEdit only saves the action name
HistoryModel.getModel("action").addItem("mycmd " + command); // but we want the whole thing
	    
// cd - changes VFS file browser path
if (command.startsWith("cd")) {
	int index = command.indexOf(' ');
	String dir = command.substring(index + 1).trim();
	cd(dir);
}
	
// s/ or s# - substitutions aka search and replace
if (command.startsWith("s/") || command.startsWith("s#")) {
	String delimiter = command.substring(1,2); // delimeter is either '/' or '#'
	String[] parts = command.split(delimiter);
	s(parts[1], parts[2], parts[3]);
}
}

void s(find, replace, options) {
   // search and replace code here
}

void cd(path) {
  // change vfs file browser path code here
}

 
RunMyCommand();


So now I can <ctrl+enter>mycmd cd ~/Docs<enter> in the action bar and it will open the vfs file browser to that directory. Or <ctrl+enter>mycmd s/replace_this/with_that/g<enter> and it will do a search & replace in the current buffer! I've implemented the last part ("/g") to set the options (g = entire buffer, r = regex, i = ignore-case) etc. Very fast!

As one adds functions to the mycmd.bsh beanshell macro, I can see that this could become very useful.

Hopefully someone will find this useful!

Cheers,
Irumat.
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