Next: Side Window Options and Functions, Up: Side Windows [Contents][Index]
29.17.1 Displaying Buffers in Side WindowsThe following action function for display-buffer
(see Action Functions for Buffer Display) creates or reuses a side window for displaying the specified buffer.
This function displays buffer in a side window of the selected frame. It returns the window used for displaying buffer, nil
if no such window can be found or created.
alist is an association list of symbols and values as for display-buffer
. The following symbols in alist are special for this function:
side
Denotes the side of the frame where the window shall be located. Valid values are left
, top
, right
and bottom
. If unspecified, the window is located at the bottom of the frame.
slot
Denotes a slot at the specified side where to locate the window. A value of zero means to preferably position the window in the middle of the specified side. A negative value means to use a slot preceding (that is, above or on the left of) the middle slot. A positive value means to use a slot following (that is, below or on the right of) the middle slot. Hence, all windows on a specific side are ordered by their slot
value. If unspecified, the window is located in the middle of the specified side.
dedicated
The dedicated flag (see Dedicated Windows) has a slightly different meaning for side windows. When a side window is created, that flag is set to the value side
to prevent display-buffer
to use the window in other action functions. Its value persists across invocations of quit-window
, kill-buffer
, previous-buffer
and next-buffer
.
In particular, these commands will refrain from showing, in a side window, buffers that have not been displayed in that window before. They will also refrain from having a normal, non-side window show a buffer that has been already displayed in a side window. A notable exception to the latter rule occurs when an application, after displaying a buffer, resets that bufferâs local variables. To override these rules and always delete a side window with quit-window
or kill-buffer
, and eventually prevent the use of previous-buffer
and next-buffer
, set this value to t
or specify a value via display-buffer-mark-dedicated
.
If you specify the same slot on the same side for two or more different buffers, the buffer displayed last is shown in the corresponding window. Hence, slots can be used for sharing the same side window between buffers.
This function installs the window-side
and window-slot
parameters (see Window Parameters) and makes them persistent. It does not install any other window parameters unless they have been explicitly provided via a window-parameters
entry in alist.
By default, side windows cannot be split via split-window
(see Splitting Windows). Also, a side window is not reused or split by any buffer display action (see Action Functions for Buffer Display) unless it is explicitly specified as target of that action. Note also that delete-other-windows
cannot make a side window the only window on its frame (see Deleting Windows).
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