Emacs Stack Exchange
Emacs Stack Exchange

Questions tagged [buffer-modified]

13 questions
35
votes
2 answers

How can I see the changes made to a modified buffer since the last save?

Given a modified buffer, how can I diff it with the file backing it on disk to see what I've changed?
nosefrog
  • 795
  • 6
  • 9
12
votes
3 answers

How to modify a buffer without undo noticing?

Q: How do I insert/modify text in a buffer without undo noticing? Here's the use case. I have a comment block at the start of every file that, among other things, updates a timestamp for the most recent change to a file. I'd like to be able to…
Dan
  • 32,584
  • 6
  • 98
  • 168
9
votes
1 answer

How to hook into buffer modified state?

Such as in the built-in variable mode-line-modified which displays an asterisk in the mode line if the buffer is modified. Specifically, I want to turn hl-line-mode off when the buffer is modified and on when it's not. I've read the documentation…
nanny
  • 5,704
  • 18
  • 38
8
votes
1 answer

automatically update buffers when focusing if file changed

When programming, I often switch from emacs to Xcode and viceversa. When I switch to Xcode, it automatically updates the current file when I focus Xcode window, if it detects that there are some external changes. In emacs I have to press C-x C-v…
Nisba
  • 895
  • 8
  • 19
8
votes
1 answer

How to perform a modifying action without modifying buffer?

I want to add properties to text (make it read-only temporarily) and I don't want “modification-status” change. In general, how do I perform some modifying action without Emacs noticing it?
Mark Karpov
  • 4,893
  • 1
  • 24
  • 53
4
votes
1 answer

Prevent specific parts of buffer from being editable

I wonder if it is possible to prevent specific parts of a buffer from being editable. For example, when I have outlined my document in an org-mode file, I would like to prevent any accidental changes to the headlines, and only being able to edit…
Singulaere Entitaet
  • 598
  • 5
  • 14
3
votes
2 answers

After (set-buffer-modified-p nil), the first undo command doesn't set the buffer modified flag to true

If I modify a buffer and then save it, the buffer modified flag resets and the subsequent undo commands set the buffer modified flag to true. However if I use (set-buffer-modified-p nil), the flag resets but then the first undo command doesn't set…
elvengadoribazar
  • 31
  • 1
2
votes
2 answers

Resolving the conflict when the file on disk has been changed

When a file changes on disk while you're editing in Emacs, how to merge both sets of changes into the file?
Nova
  • 1,059
  • 9
  • 21
2
votes
1 answer

How to chain after-change-hook functions?

I am trying to convert markdown to html and then use impatient-mode to display it live on browser on the fly. Impatient mode uses after-change-hook to detect changes in html. I am using after-change-hook to detect changes in markdown buffer. Buffer…
Chillar Anand
  • 4,042
  • 1
  • 23
  • 52
1
vote
1 answer

preventing save prompt for temp files

I often open temp files and I don't care about saving the contents when I modify the buffer. How can I tell Emacs to ignore buffer changes when the filename matches a pattern, so that I don't get prompted to save the buffer when I kill it? Edit: I…
jdigital
  • 125
  • 5
1
vote
1 answer

CSharp files modified on open

When I open files that default to csharp-mode, they always start modified. This is only occurring for csharp-mode. save-buffers-kill-emacs with the d option (view changes in this buffer) shows Diff finished (no differences). How can I stop .cs…
Stewart Smith
  • 141
  • 8
0
votes
0 answers

How to detect modified buffer in the mode-line, skipping special buffers?

I'm trying to have my mode-line to display a "(modified)" string instead of the * mark. To do that, I make a test with buffer-modified-p but this seems to be always true for "special" buffers as well (such as for example completion list or org…
Nicolas Rougier
  • 487
  • 3
  • 15
0
votes
1 answer

Using `with-silent-modifications` when modifying the buffer and undoing those modifications without using `undo`

I wrote a wrapper for the existing export function. My wrapper adds an appropriate bibliography: link, calls the original export function and then removes the bibliography: link. In summary, the function modifies the buffer, but undoes those…
AlwaysLearning
  • 749
  • 4
  • 14