I made a text editor and I want to port it to Linux such that I can use it remotely via SSH. I don't know much about Linux terminals, so maybe I'm missing something obvious, because I just can't believe that in 2013 there's still no way for a remote terminal to distinguish between Ctrl+M and Enter, or between Ctrl+H and Backspace, or even get any events at all for Ctrl+Left/Right/Up/Down, and so on. I tried ncurses and libtermkey to no avail. The question is, is there any effort or discussion in the Linux community on modernizing or replacing the linux terminal protocol(s) to something that supports full keyboard and mouse interaction and possibly full color, i.e. something that would allow for text user-interfaces without huge usability compromises?
As far as I know, the Linux console terminal just doesn't support this, full stop. If you want to try raising a patch, you could have a go at implementing the full CSI-encoded reporting scheme. It is documented here.
libtermkey will recognise the key sequences if sent, but the fix has to go into the terminal first of all to send them in the first place.
Related
When working in GUI we do alt-tab (or cmd-tab in mac) to switch between multiple programs, for example I am writing a text file in a text editor and then I do alt-tab to switch to already running browser to google up something then I alt-tab again to come back to keep editing.
How do you perform such "switch between" programs in command line interface - for example working with a ssh command line shell?
EDIT: I forgot to mention it, I am using ssh to connect to my university's server, and they don't have screen & tmux installed, and my account have no right to install any new apps... Is there any built-in functionality to perform this task, or any work around? For exmaple can I "minimize" running proggram and come back to regular shell interface, do some work, then display the "minimized" process again?
Another workaround: use the shell's job control, eg if you're editing a file, CTRL-z pauses the editor and brings you back to the shell, where you can compile, see manpages, browse the web or whatever -- and of course you can background the browser or anything else.
Screen command offers the ability to detach a long running process (or program, or shell-script) from a session and then attach it back at a later time.
As a crude workaround, run multiple terminal windows on your computer, and alt-tab between them.
Incidentally, at the Linux console, you can switch virtual terminals with ctrl+alt+F for at least F1 through F6, commonly F8 or more (depends on how the distro sets them up). Not your case, I know, but in case future visitors should benefit.
If you are comfortable in Emacs, it allows you to run multiple independent ansi-term buffers.
You can also use "GNU screen" to emulate multiple terminals in one terminal.
My cygwin terminal (known as Mintty) can't work, when I minimize it to the windows taskbar, and restore it, and it will receive the Ctrl-C signal, but i didn't touch any key.
This is wierd. when a long time command is running, i swith it to see wether is finishe, then it is interputed my Ctrl -C. I refresh intall it several times. it's still there.
This situation can also happened when i select some text on the terminal.
Thanks
Some translator software have the "Hyper Translate" function, which will copy texts selected then tries to translate it, the way how it copy strings is to simulate a Ctrl-C from keyboard. When using cygwin or some ssh/telnet terminal tools (e.g. SecureCRT, putty, NX Client..) and the Ctrl-C is not set as the hotkey for copy action, and you tries to select a block of texts, trouble comes.
I guess the one who asking this question is also a Chinese like me. Then, the famous software which will bring this trouble is "Youdao Dictionary".
Disabling the "Hyper Translate / HuaCiFanYi" function of the "Youdao Dictionary" is a remedy.
As Leif Zhang mentioned, if you are using Lingoes or other dictionary you should uncheck the option Translate Selected Text as the following image.
I am aware that the mousefocus option is only supposed to work in gVim. But I was wondering, if it's possible to have the console Vim switch to different windows in response to mouse clicks, would it be not possible to easily add following mouse movement to it, too?
I'm an xmonad user, I love the focus following the pointer feature, I do a lot of pdf viewing and browsing while writing in Vim, and I'd be so much happier if I didn't have to keep mentally switching back and forth between two different types of focus changing.
If that's completely not possible, I guess opening new Vim windows (as with :split) in new instances of the terminal is no easier to do?
It would not be at all simple to add this. Using the mouse within the terminal works by vim sending control codes to the terminal requesting that mouse actions be sent as part of the input stream. Terminals only report clicks not changes in the pointer position, so vim has no way of knowing where the mouse is.
With major changes it would likely be possible for a vim with X support to get pointer activity directly from the X server, but that would likely be reported by pixel rather than by character so further work would need to be done before it could determine which vim window is currently under the pointer.
set mouse=a
should do the trick but it will probably depend on your terminal emulator. See :help 'mouse'.
This works for Windows 7/Cygwin 32bit mintty/vim 7.3: (I DO NOT use gvim!)
Having installed this: http://ehiti.de/katmouse/, I can scroll the window under my cursor without having to have clicked to select a window, click-selecting of single vim-windows works, too. It does not pull the vim window to the foreground, if another window overlaps it, if that is what you desire. Still it can be scrolled without click-selecting it first.
So:
Check if there exists a software paket for your distribution, that implements your desired mouse behavior on the OS level. When this works for my self-compiled vim in cygwin, it might very well work with console vim on linux, too.
This post here serves as evidence, that it is possible at all, that is the reason this was not made a comment. When I am on linux again I will investigate this further and update this post, but that might take a while.
On set mouse=a: The vim help states you a need a terminal capable of handling mouse inputs, further information can be found here. :help ttymouse might also be helpful, i.e. if you have a xterm-compliant console, but :help term is set to something else.
UPDATE: (Freshly installed Fedora 19 with packages, no self-compiled stuff.)
Fedora 19 + se mouse=a = scrolling in single console vim window with several buffers opened next to each other independently works, too. Window manager used is LXDE.
I'm trying to use xdebug with vim on linux. I follow the instructions to install xdebug and after that I can see the information about xdebug if I call phpinfo() from a file inside the apache server.
After open a file in vim, it is supposed that when I press F5 it should show something like "waiting for a new connection on port 9000 for 10 seconds...", but it doesn't show anything..
Any idea?
I would recommend you look at a new vim debugger plugin, called vdebug: https://github.com/joonty/vdebug -- it is actively developed and seems very capable.
I had the same sort of problem, it turned out that my terminal emulator was capturing the keypress and not sending it to vim (I think). Remapping the functions to different keys solved the problem.
It could actually be his/her keyboard. If the keyboard has mult-media functions as well as F1-F12 on them... then there is, usually a "F-Lock" key next to the row of function keys that will turn on/off the function key behavior. Really annoying, IMHO, for the new keyboards sold these days.... and rarely does the keyboard have a light to indicate the ulterior operation of said function keys.
I say this cuz, that is exactly what happened to me just now.
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Background
I'm building an application where it detects what documents you're using from the file system. To do this it must access the AXDocument attribute of the active window. MacVim provides this. Running Vim in the Terminal wouldn't provide this.
I've just put out a survey to ask what editor coders who are interested in my app use. A significant number of the folk using Vim used it directly from the command line.
Why not use a GUI Vim?
Why do some people prefer to run Vim this way versus a GUI implementation like MacVim?
What advantages does this offer? As I understand it, you can send files to MacVim from the command line just as easily as command line Vim.
These reasons may be different for each specific developer but my guess would be:
vim is pretty much vim on any platform. GUI implementations can
vary.
Familiarity - being familiar with vim does not nessecarily mean
being familar with vim wrapped ina
GUI - espectially given #1.
"Elite Complex" ;-)
No definite avantages to the users over cli vim.
One might not have access to a gui (think ssh) or simply force of habit.
Although I don't use any feature exclusive to the GUI version (never touch the mouse while editing) I find GVIM more pleasing to the eye for fonts rendering and color management. So the only reason to use the cli version is not having access to a graphic environment (like when accessing a remote machine via ssh). Using GVIM also allows reuse of the terminal it was called from without having to use screen.
being able to run vim under screen provides
reliability: it will stay alive if X or the terminal app crashes. not sure how applicable this is to the Mac.
the option to multiplex sessions within terminal tabs. I actually end up rarely using terminal tabs because of this. It's possible (albeit a bit confusing) to set up heirarchical screen sessions and move branches of them around. screen is super awesome. This also provides an additional layer of text buffering in which you can search by regexp — this is useful if you spawn a shell command that is pages long and you're looking for a particular word in there.
the ability to connect to an existing session from another computer or reconnect after a network outage
and friends
in addition to making it possible to use screen, the console vim provides better shell integration. Although it's possible to run shell commands from within gvim (again, I'm not sure how this applies to the Mac, I'm a linux guy), there are limitations. I rarely use a gui vim so I'm not sure about the exact limits. For example, ANSI color codes are removed. I find this annoying because I tend to interact with SCM that way, for example running :!git diff --cached to check the changes in the index before committing. It makes for a somewhat quicker and more satisfying (mmm, diffy!) read if it's colourized.
I used to feel that gvim was a big improvement for viewing diffs, but I've changed the background colour of my terminal to a dark non-black shade, and set
:highlight DiffAdd ctermbg=Black
:highlight DiffChange ctermbg=Black
:highlight DiffDelete ctermbg=Black
:highlight DiffText cterm=Bold ctermbg=None
The result of this is that in diff mode, differing text shows up with a black background, and unchanged text is coloured with the terminal background colour. For side-by-side diffs, this works wonderfully, since you can tell immediately based on the other side whether a given line is a change or add; for non-side-by-side you will be able to see an unchanged part in a changed line.
This means that you can leave syntax colouring on and still be able to see diffs. Again, you do need to be able to set the background colour of the terminal to a unique, dark, non-black shade. This facility is available in the terminal emulators that I use (yakuake/konsole and roxterm) and many others.^[?Mac^M"mya)^O^Op
This also assumes that you're using a colourscheme meant for use with a dark background colour; I use a modified delek.
Although I haven't tried this, there is also the option to run console vim in 256-colour mode on terminals which support that mode — which I believe includes most or all modern ones. This can serve to make much of the subtlety of GUI colorschemes available to console vim.^["mp
I also like it that it lives in the place where it was started, and starts up quick. So if I'm navigating around in the shell, as per my wont, I can edit a file without interrupting that flow or having to farm that operation out to a different piece of conceptual real estate. Having less things to keep track of is a big plus. Being able to background it is helpful, too, for example if I need to grab the contents of an unexported shell variable via xclip. If I'd spawned a GUI window instead I might have some trouble remembering where that shell was, or might have already closed it.
My main reason for using a gui vim at all is that it makes somewhat more sense as something spawned from a gui app, eg a browser. In practice I never do this, and I suspect that it's fairly equivalent to just have a new terminal window pop up with a new console vim in it. Though there is likely some (window manager) window management functionality that is exclusive to gui implementations. This is pretty similar to the use case you're discussing.
gvim is actually just a basic terminal emulator with vim running in it, and some menus and toolbar buttons up the top.
So if you have a good, full-featured terminal emulator already, you may as well use that instead, since you'll be using the same type of terminal window that you are familiar with across all your terminal sessions.
Another benefit is that it makes it easy to switch to a shell inside vim and then switch out seamlessly.
On Windows I prefer gvim. On Linux it's vim inside gnome-terminal, which is nice and configurable thankyou.
To avoid (or at least minimize) the use of the mouse.
some gvim variations can't handle
some of my hotkeys
some spawn separate window when i try
to compile program
sometimes they simply can't use fonts
like fixed or terminus correctly
(think about "terminus bold" - some
gvim variations simply stretch
"terminus normal" instead of
rendering with the separate font)
cli generally works faster than gui,
especially if running in real
textmode console (not possible on a
mac though)
there are almost no benefits in using
GUI version, and i'd loose ability to
run in screen, ssh, to suspend
process with ctrl+z, and many more.
The main reason I use the command line is that I spend most of my day in a terminal already, and my use of vim reflects this. I do not open up vim for a long while just editing different files then opening others without closing it; I usually open a file or two do a few edits then do some command line tasks, maybe change a directory, and open up vim somewhere else. When using the a gui there is substantial lag when opening the editor. This wouldn't bother me if I opened it once and left it open but I tend to not work that way. So the command line works better for my workflow. Furthermore since there is no real benefit feature-wise of the GUI over the command line and vise-versa, I've always just stuck with the command line since it suited me better.
vim is way more performant with huge files (100-500MB .csv or .xml files in my case).
gvim beats vim hands-down when used to compare files (gvimdiff): setting the font (want more content on the screen?), dragging the window split line (want to see more of one file rather than the other) etc.
Other than that, I haven't seen other mayor differences and use gvim except when working with large files because I find it more handy in a graphical environment (gnome).
Speed of rendering
proper shell integration with
suspend (C-z),
alternate terminal,
uniform copy/paste
nicer quickfix integration (all external programs run inside your terminal, instead of popup windows... )
network agnostic: can run over ssh
using GNU screen, can detach/attach session over internet;
To the sometimes mentioned 'downside':
mouse support is up to par with :se mouse +=a; this enables selection, window border dragging with the mouse, even over GNU screen over ssh
Pair coding via vim + gnu screen is the selling point for me. I work in screen/vim all day, it allows people to remote into my screen session and we can both edit files fluidly. It's so hot right now.
As a big vim user myself, although I know about GUI vims, I don't use them just out of habit.
I've been using vi since 1990, switched to vim a few years ago but still call it through an alias (alias vi=vim).
For me its just habit. vim works well as it is. Perhaps the gui offers more and I should explore it, but vim works just the way I expect it to and want it to.