19.2.8 Edebug Views ¶

These Edebug commands let you view aspects of the buffer and window status as they were before entry to Edebug. The outside window configuration is the collection of windows and contents that were in effect outside of Edebug.

v ¶

Switch to viewing the outside window configuration (edebug-view-outside). Type C-x X w to return to Edebug.

p ¶

Temporarily display the outside current buffer with point at its outside position (edebug-bounce-point), pausing for one second before returning to Edebug. With a prefix argument n, pause for n seconds instead.

P ¶

Temporarily display the outside current buffer with the outside point corresponding to the previously-evaluated value (edebug-bounce-to-previous-value), pausing for one second before returning to Edebug. With a prefix argument n, pause for n seconds instead.

w ¶

Move point back to the current stop point in the source code buffer (edebug-where).

If you use this command in a different window displaying the same buffer, that window will be used instead to display the current definition in the future.

W ¶

Toggle whether Edebug saves and restores the outside window configuration (edebug-toggle-save-windows).

With a prefix argument, W only toggles saving and restoring of the selected window. To specify a window that is not displaying the source code buffer, you must use C-x X W from the global keymap.

You can view the outside window configuration with v or just bounce to the point in the current buffer with p, even if it is not normally displayed.

You can also bounce to buffer positions other than the current point. Suppose you are debugging the form

(make-overlay beg end)

and you would like to know where beg and end are located in the outside buffer. Then you could either evaluate these, for example, with C-x C-e, or step over them with n, and immediately after that press P, to bounce to the position you have previously evaluated. The previous value for the purpose of the P command is what Edebug has evaluated before its last stop point or what you have evaluated in the context outside of Edebug, for example, with C-x C-e.

After moving point, you may wish to jump back to the stop point. You can do that with w from a source code buffer. You can jump back to the stop point in the source code buffer from any buffer using C-x X w.

Each time you use W to turn saving off, Edebug forgets the saved outside window configuration—so that even if you turn saving back on, the current window configuration remains unchanged when you next exit Edebug (by continuing the program). However, the automatic redisplay of *edebug* and *edebug-trace* may conflict with the buffers you wish to see unless you have enough windows open.