diff options
Diffstat (limited to 'lispref/windows.texi')
| -rw-r--r-- | lispref/windows.texi | 48 |
1 files changed, 27 insertions, 21 deletions
diff --git a/lispref/windows.texi b/lispref/windows.texi index 9199ff0f8d2..bd4bad02137 100644 --- a/lispref/windows.texi +++ b/lispref/windows.texi @@ -597,7 +597,9 @@ when you need complete control. @defun set-window-buffer window buffer-or-name This function makes @var{window} display @var{buffer-or-name} as its -contents. It returns @code{nil}. +contents. It returns @code{nil}. This is the fundamental primitive +for changing which buffer is displayed in a window, and all ways +of doing that call this function. @example @group @@ -669,6 +671,16 @@ If it is a frame, consider windows on that frame. @end itemize @end defun +@defvar buffer-display-time +@tindex buffer-display-time +This variable records the time at which a buffer was last made visible +in a window. It is always local in each buffer; each time +@code{set-window-buffer} is called, it sets this variable to +@code{(current-time)} in the specified buffer (@pxref{Time of Day}). +When a buffer is first created, @code{buffer-display-count} starts out +with the value @code{nil}. +@end defvar + @node Displaying Buffers @section Displaying Buffers in Windows @cindex switching to a buffer @@ -685,7 +697,8 @@ See the preceding section for @ifinfo @xref{Buffers and Windows}, for @end ifinfo -low-level functions that give you more precise control. +low-level functions that give you more precise control. All of these +functions work by calling @code{set-window-buffer}. Do not use the functions in this section in order to make a buffer current so that a Lisp program can access or modify it; they are too @@ -786,14 +799,6 @@ don't care which other buffer is used; you just want to make sure that This function returns @code{nil}. @end deffn -@tindex buffer-display-count -@defvar buffer-display-count -This variable is always buffer-local in each buffer. When the buffer is -created, @code{buffer-display-count} has value 0. Each time the buffer -is displayed in a window, that increments the value of -@code{buffer-display-count}. -@end defvar - @node Choosing Window @section Choosing a Window for Display @@ -1308,13 +1313,14 @@ Replaces three keystroke sequence C-u 0 C-l." @section Horizontal Scrolling @cindex horizontal scrolling - Because we read English first from top to bottom and second from left -to right, horizontal scrolling is not like vertical scrolling. Vertical -scrolling involves selection of a contiguous portion of text to display. -Horizontal scrolling causes part of each line to go off screen. The -amount of horizontal scrolling is therefore specified as a number of -columns rather than as a position in the buffer. It has nothing to do -with the display-start position returned by @code{window-start}. + Because we read English from left to right in the ``inner loop'', and +from top to bottom in the ``outer loop'', horizontal scrolling is not +like vertical scrolling. Vertical scrolling involves selection of a +contiguous portion of text to display, but horizontal scrolling causes +part of each line to go off screen. The amount of horizontal scrolling +is therefore specified as a number of columns rather than as a position +in the buffer. It has nothing to do with the display-start position +returned by @code{window-start}. Usually, no horizontal scrolling is in effect; then the leftmost column is at the left edge of the window. In this state, scrolling to @@ -1838,8 +1844,8 @@ over. In most cases, @code{save-selected-window} (@pxref{Selecting Windows}) is what you need here. @end defvar -@tindex redisplay-end-trigger-functions @defvar redisplay-end-trigger-functions +@tindex redisplay-end-trigger-functions This abnormal hook is run whenever redisplay in window uses text that extends past a specified end trigger position. You set the end trigger position with the function @code{set-window-redisplay-end-trigger}. The @@ -1849,19 +1855,19 @@ feature, and the trigger value is automatically reset to @code{nil} just after the hook is run. @end defvar -@tindex set-window-redisplay-end-trigger @defun set-window-redisplay-end-trigger window position +@tindex set-window-redisplay-end-trigger This function sets @var{window}'s end trigger position at @var{position}. @end defun -@tindex window-redisplay-end-trigger @defun window-redisplay-end-trigger window +@tindex window-redisplay-end-trigger This function returns @var{window}'s current end trigger position. @end defun -@tindex window-configuration-change-hook @defvar window-configuration-change-hook +@tindex window-configuration-change-hook A normal hook that is run every time you change the window configuration of an existing frame. This includes splitting or deleting windows, changing the sizes of windows, or displaying a different buffer in a |