Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 242 by splinter...@gmail.com: Diff mode does not update when a
context line is changed.
http://code.google.com/p/vim/issues/detail?id=242
What steps will reproduce the problem?
1. Open up a file, change at least one line.
2. ":saveas tmp"
2. ":diffsplit original-file"
3. Modify one of the context lines.
What is the expected output? What do you see instead?
The line in the original file should be highlighted with DiffChange; the
modified file should have that line highlighted with DiffChange and
DiffText where the change occurred. Instead, nothing happens.
What version of the product are you using? On what operating system?
VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Jul 24 2014 17:37:05)
Included patches: 1-383
Compiled by admin@scott-pc
Normal version with GTK2 GUI. Features included (+) or not (-):
+acl -farsi -mouse_netterm +syntax
-arabic +file_in_path -mouse_sgr +tag_binary
+autocmd +find_in_path -mouse_sysmouse +tag_old_static
+balloon_eval +float -mouse_urxvt -tag_any_white
+browse +folding +mouse_xterm -tcl
+builtin_terms -footer +multi_byte +terminfo
+byte_offset +fork() +multi_lang +termresponse
+cindent +gettext -mzscheme +textobjects
+clientserver -hangul_input +netbeans_intg +title
+clipboard +iconv +path_extra +toolbar
+cmdline_compl +insert_expand -perl +user_commands
+cmdline_hist +jumplist +persistent_undo +vertsplit
+cmdline_info -keymap +postscript +virtualedit
+comments -langmap +printer +visual
-conceal +libcall -profile +visualextra
+cryptv +linebreak -python +viminfo
-cscope +lispindent -python3 +vreplace
+cursorbind +listcmds +quickfix +wildignore
+cursorshape +localmap +reltime +wildmenu
+dialog_con_gui -lua -rightleft +windows
+diff +menu -ruby +writebackup
+digraphs +mksession +scrollbind +X11
+dnd +modify_fname +signs -xfontset
-ebcdic +mouse +smartindent +xim
-emacs_tags +mouseshape -sniff +xsmp_interact
+eval -mouse_dec +startuptime +xterm_clipboard
+ex_extra -mouse_gpm +statusline -xterm_save
+extra_search -mouse_jsbterm -sun_workshop -xpm
system vimrc file: "$VIM/vimrc"
user vimrc file: "$HOME/.vimrc"
2nd user vimrc file: "~/.vim/vimrc"
user exrc file: "$HOME/.exrc"
system gvimrc file: "$VIM/gvimrc"
user gvimrc file: "$HOME/.gvimrc"
2nd user gvimrc file: "~/.vim/gvimrc"
system menu file: "$VIMRUNTIME/menu.vim"
fall-back for $VIM: "/usr/local/share/vim"
Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK -pthread
-I/usr/include/gtk-2.0 -I/usr/lib/x86_64-linux-gnu/gtk-2.0/include
-I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0
-I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/
-I/usr/include/freetype2 -I/usr/include/glib-2.0
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/pixman-1
-I/usr/include/libpng12 -I/usr/include/harfbuzz -O2
-fno-strength-reduce -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: gcc -L/usr/local/lib -Wl,--as-needed -o vim -lgtk-x11-2.0
-lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lpangocairo-1.0
-lgdk_pixbuf-2.0 -lcairo -lpango-1.0 -lfontconfig -lgobject-2.0 -lglib-2.0
-lfreetype -lSM -lICE -lXt -lX11 -lXdmcp -lSM -lICE -lm -ltinfo -lnsl
-ldl
Please provide any additional information below.
The solution on vim.wikia.com [1] is to add :diffupdate as an auto-command
on every BufWrite, but that seems inefficient and obviously not what vim
does when one adds or removes a line in diff mode. For example:
1. Open up a file, change at least one line.
2. ":saveas tmp"
2. ":diffsplit original-file"
3. Modify one of the context lines and then hit enter.
Observe that while the diff of the original updates to highlight the new
line with DiffDelete, but that the modified line above it does not change.
If :diffupdate had been called, both changes would be noted by vim.
[1]: http://vim.wikia.com/wiki/Update_the_diff_view_automatically
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