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[SOLVED] Getting Current Cursor Location [message #765311]

Tue, 13 December 2011 20:22

Kivanc Muslu

Messages: 153
Registered: November 2010

Senior Member

Hi,

Is there an Eclipse API that I can use which will return me the current location of the cursor on the selected (i.e., focused, active) Eclipse editor?
The results can be something like:
- offset: 315
or
- SomeClassFile.java:315

Thanks in advance, best regards,

[Updated on: Wed, 14 December 2011 12:31]

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Re: Getting Current Cursor Location [message #765509 is a reply to message #765311]

Wed, 14 December 2011 08:18

Dani Megert

Messages: 3802
Registered: July 2009

Senior Member

On 13.12.2011 21:22, Kivanc Muslu wrote:
> Hi,
> Is there an Eclipse API that I can use which will return me the
> current location of the cursor on the selected (i.e., focused, active)
> Eclipse editor? The results can be something like:
> - offset: 315 or
> - SomeClassFile.java:315
See org.eclipse.ui.texteditor.ITextEditor.getSelectionProvider().

Dani
>
> Thanks in advance, best regards,

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Re: Getting Current Cursor Location [message #765579 is a reply to message #765509]

Wed, 14 December 2011 10:29

Kivanc Muslu

Messages: 153
Registered: November 2010

Senior Member

Hi Dani,

Though this partly provides what I need, I cannot get the changes done on the cursor (i.e., exact movement path of the cursor on the screen) with this. After adding a listener to a file, I only get if something is selected on that particular file.

I realized that my initial question might be misleading. My problem is following. Let's say that I have a file open in Eclipse and the cursor is on offset 10. I want to be able to get all changes on the cursor (i.e., its new location) as user changes it on the screen.

e.g.,
User moves the cursor by mouse to offset 45 (without selecting any text), I want to get offset = 45
User hits down key, I want to get: offset = 20 (assuming that one line is 10 characters long), etc.

Is there an API (listener) for this?

Thanks,

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Re: Getting Current Cursor Location [message #765590 is a reply to message #765579]

Wed, 14 December 2011 10:54

Dani Megert

Messages: 3802
Registered: July 2009

Senior Member

On 14.12.2011 11:29, Kivanc Muslu wrote:
> Hi Dani,
> Though this partly provides what I need, I cannot get the changes done
> on the cursor (i.e., exact movement path of the cursor on the screen)
> with this. After adding a listener to a file, I only get if something
> is selected on that particular file.
>
> I realized that my initial question might be misleading. My problem is
> following. Let's say that I have a file open in Eclipse and the cursor
> is on offset 10. I want to be able to get all changes on the cursor
> (i.e., its new location) as user changes it on the screen.
Add a post selection listener. Either add it on the (post) selection
provider you get from the editor or ask the editor site for the
selection service and add it there. See org.eclipse.ui.ISelectionService
for details.

Dani
>
> e.g., User moves the cursor by mouse to offset 45 (without selecting
> any text), I want to get offset = 45
> User hits down key, I want to get: offset = 20 (assuming that one line
> is 10 characters long), etc.
>
> Is there an API (listener) for this?
>
> Thanks,

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Re: Getting Current Cursor Location [message #765636 is a reply to message #765590]

Wed, 14 December 2011 12:30

Kivanc Muslu

Messages: 153
Registered: November 2010

Senior Member

Hi Dani,

It works beautifully, thanks a lot for the help.

For people who have the same problem (or might have the same problem), here is some more detailed code:

Adding the listener:

IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
window.getSelectionService().addPostSelectionListener(new SynchronizerCursorListener());

where the listener is implemented as:

public class SynchronizerCursorListener implements ISelectionListener
{
    @Override
    public void selectionChanged(IWorkbenchPart part, ISelection selection)
    {
        if (selection instanceof TextSelection)
        {
            TextSelection textSelection = (TextSelection) selection;
            int offset = textSelection.getOffset();
            // Do something with offset
        }
        // Not a text selection event, ignore.
    }
}

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