This is ../../info/edt, produced by makeinfo version 4.11 from edt.texi. This file documents the EDT emulation package for Emacs. Copyright (C) 1986, 1992, 1994, 1995, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with the Front-Cover texts being "A GNU Manual," and with the Back-Cover Texts as in (a) below. A copy of the license is included in the section entitled "GNU Free Documentation License". (a) The FSF's Back-Cover Text is: "You have the freedom to copy and modify this GNU manual. Buying copies from the FSF supports it in developing GNU and promoting software freedom." INFO-DIR-SECTION Emacs START-INFO-DIR-ENTRY * EDT: (edt). An Emacs emulation of the EDT editor. END-INFO-DIR-ENTRY  File: edt, Node: Top, Next: Overview, Up: (dir) Emacs EDT emulation ******************* This manual describes the Emacs EDT package, which provides emulation of DEC's EDT editor. This file documents the EDT emulation package for Emacs. Copyright (C) 1986, 1992, 1994, 1995, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with the Front-Cover texts being "A GNU Manual," and with the Back-Cover Texts as in (a) below. A copy of the license is included in the section entitled "GNU Free Documentation License". (a) The FSF's Back-Cover Text is: "You have the freedom to copy and modify this GNU manual. Buying copies from the FSF supports it in developing GNU and promoting software freedom." * Menu: * Overview:: Overview of the EDT package. * Supported terminals:: Terminals/keyboards that are supported. * Starting emulation:: How to get started. * Platform-specific notes:: Notes specific to certain platforms. * Differences:: How does this EDT emulation differ from real EDT? * Highlights:: Some highlights, and comparisons to the original Emacs EDT emulation. * Customizing:: Customizing emulation. * GNU Free Documentation License:: The license for this manual.  File: edt, Node: Overview, Next: Supported terminals, Prev: Top, Up: Top 1 Overview of the EDT Package ***************************** This manual describes version 4.0 of the EDT Emulation for Emacs 19 and above. It comes with special functions which replicate nearly all of EDT's keypad mode behavior. It sets up default keypad and function key bindings which closely match those found in EDT. Support is provided so that users may reconfigure most keypad and function key bindings to their own liking. Version 4.0 contains several enhancements (*note Changes::). * Menu: * Quick start:: How to begin using EDT. * Changes:: What's new in version 4.0. * Goals:: The aims of this package.  File: edt, Node: Quick start, Next: Changes, Up: Overview 1.1 How to Begin Using EDT ========================== To start the EDT Emulation, first start Emacs and then enter `M-x edt-emulation-on' to begin the emulation. After initialization is complete, the following message will appear below the status line informing you that the emulation has been enabled: "Default EDT keymap active". You can have the EDT Emulation start up automatically, each time you initiate a GNU Emacs session, by adding the following line to your `.emacs' file: (add-hook term-setup-hook 'edt-emulation-on) *Important:* Be sure to read the rest of this manual. It contains very useful information on how the EDT Emulation behaves and how to customize it to your liking. The EDT emulation consists of the following files: * `edt.texi' - This manual. * `edt-user.el' - An example customization file. * `edt.el' - EDT emulation functions and default configuration. * `edt-lk201.el' - Built-in support for DEC LK-201 keyboards. * `edt-vt100.el' - Built-in support for DEC VT-100 (and above) terminals. * `edt-pc.el' - Built-in support for PC 101 Keyboards under MS-DOS. * `edt-mapper.el' - Create an EDT LK-201 map file for keyboards without built-in support.  File: edt, Node: Changes, Next: Goals, Prev: Quick start, Up: Overview 1.2 What's New in Version 4.0 ============================= Version 4.0 contains the following enhancements: 1. Scroll margins at the top and bottom of the window are now supported. (The design was copied from `tpu-extras.el'.) By default, this feature is enabled with the top margin set to 10% of the window and the bottom margin set to 15% of the window. To change these settings, you can invoke the function `edt-set-scroll-margins' in your `.emacs' file. For example, the following line (edt-set-scroll-margins "20%" "25%") sets the top margin to 20% of the window and the bottom margin to 25% of the window. To disable this feature, set each margin to 0%. You can also invoke `edt-set-scroll-margins' interactively while EDT Emulation is active to change the settings for that session. *Please note:* Another way to set the scroll margins is to use the Emacs customization feature (not available in Emacs 19) to set the following two variables directly: `edt-top-scroll-margin' and `edt-bottom-scroll-margin'. Enter the Emacs `customize' command. First select the `Editing' group and then select the `Emulations' group. Finally, select the `Edt' group and follow the directions. 2. The `SUBS' command is now supported and bound to `GOLD-Enter' by default. (This design was copied from `tpu-edt.el'.) Note, in earlier versions of EDT Emulation, `GOLD-Enter' was assigned to the Emacs function `query-replace'. The binding of `query-replace' has been moved to `GOLD-/'. If you prefer to restore `query-replace' to `GOLD-Enter', then use an EDT user customization file, `edt-user.el', to do this (*note Customizing::). 3. EDT Emulation now also works in XEmacs, including the highlighting of selected text. 4. If you access a workstation using an X Server, observe that the initialization file generated by `edt-mapper.el' will now contain the name of the X Server vendor. This is a convenience for those who have access to their Unix account from more than one type of X Server. Since different X Servers typically require different EDT emulation initialization files, `edt-mapper.el' will now generate these different initialization files and save them with different names. Then, the correct initialization file for the particular X server in use is loaded correctly automatically. 5. Also, `edt-mapper.el' is now capable of binding an ASCII key sequence, providing the ASCII key sequence prefix is already known by Emacs to be a prefix. As a result of providing this support, some terminal/keyboard/window system configurations, which don't have a complete set of sensible function key bindings built into Emacs in `function-key-map', can still be configured for use with EDT Emulation. (Note: In a few rare circumstances this does not work properly. In particular, it does not work if a subset of the leading ASCII characters in a key sequence are recognized by Emacs as having an existing binding. For example, if the keypad 7 () key generates the sequence `Ow' and `O' is already bound to a function, pressing when told to do so by `edt-mapper.el' will result in `edt-mapper.el' incorrectly mapping `O' to and `w' to . If something like this happens to you, it is probably a bug in the support for your keyboard within Emacs *or* a bug in the Unix termcap/terminfo support for your terminal *or* a bug in the terminal emulation software you are using.) 6. The `edt-quit' function (bound to `GOLD-q' by default) has been modified to warn the user when file-related buffer modifications exist. It now cautions the user that those modifications will be lost if the user quits without saving those buffers.  File: edt, Node: Goals, Prev: Changes, Up: Overview 1.3 The Aims of this Package ============================ 1. Emulate EDT Keypad Mode commands closely so that current EDT users will find that it easy and comfortable to use GNU Emacs with a small learning curve. 2. Make it easy for a user to customize EDT emulation key bindings without knowing much about Emacs Lisp. 3. Make it easy to switch between the original EDT default bindings and the user's customized EDT bindings, without having to exit Emacs. 4. Provide support for some TPU/EVE functions not supported in EDT. 5. Provide an easy way to restore *all* original Emacs key bindings, just as they existed before the EDT emulation was first invoked. 6. Support GNU Emacs 19 and higher. (GNU Emacs 18 and below is no longer supported.) XEmacs 19, and above, is also supported. 7. Supports highlighting of marked text within the EDT emulation on all platforms on which Emacs supports highlighting of marked text. 8. Handle terminal configuration interactively for most terminal configurations, when the emulation is invoked for the first time. 9. Support a PC AT keyboard under MS-DOS.  File: edt, Node: Supported terminals, Next: Starting emulation, Prev: Overview, Up: Top 2 Terminals/Keyboards that are Supported **************************************** Keyboards used under a Window System are supported via the `edt-mapper' function. The first time you invoke the emulation under a window system, the `edt-mapper' function is run automatically and the user is prompted to identify which keys the emulation is to use for the standard keypad and function keys EDT expects (e.g., , , , , , , etc.). This configuration is saved to disk read each time the emulation is invoked. In character oriented connections not running a window manager, built-in support for the following terminals/keyboards is provided: 1. DEC VT-100 series and higher. This includes well behaved VT clones and emulators. If you are using a VT series terminal, be sure that the `TERM' environment variable is set properly before invoking emacs. 2. PC AT keyboard under MS-DOS. Be sure to read *note Platform-specific notes:: to see if those notes apply to you.  File: edt, Node: Starting emulation, Next: Platform-specific notes, Prev: Supported terminals, Up: Top 3 How to Get Started ******************** Start up GNU Emacs and enter `M-x edt-emulation-on' to begin the emulation. After initialization is complete, the following message will appear below the status line informing you that the emulation has been enabled: "Default EDT keymap active". You can have the EDT Emulation start up automatically, each time you initiate a GNU Emacs session, by adding the following line to your `.emacs' file: (add-hook term-setup-hook 'edt-emulation-on) A reference sheet is included (later on) listing the default EDT Emulation key bindings. This sheet is also accessible on line from within Emacs by pressing , `GOLD-H', or `HELP' (when in the EDT Default Mode). It is easy to customize key bindings in the EDT Emulation (*note Customizing::). Customizations are placed in a file called `edt-user.el'. The Emacs `etc/' directory contains an example. If `edt-user.el' is found in your GNU Emacs load path during EDT Emulation initialization, then the following message will appear below the status line indicating that the emulation has been enabled, enhanced by your own customizations: "User EDT custom keymap active". Once enabled, it is easy to switch back and forth between your customized EDT Emulation key bindings and the default EDT Emulation key bindings. (Look at the binding to `GOLD-Z' in the sample `edt-user.el' file.) It is also easy to turn off the emulation (via the command `edt-emulation-off'). Doing so completely restores the original key bindings in effect just prior to invoking the emulation. Emacs binds keys to ASCII control characters and so does the real EDT. Where EDT key bindings and GNU Emacs key bindings conflict, the default GNU Emacs key bindings are retained by the EDT emulation by default. If you are a diehard EDT user you may not like this. The *note Control keys:: section explains how to change this so that the EDT bindings to ASCII control characters override the default Emacs bindings.  File: edt, Node: Platform-specific notes, Next: Differences, Prev: Starting emulation, Up: Top 4 Notes Specific to Certain Platforms ************************************* * Menu: * Sun workstations:: Sun workstations running X. * MS-DOS:: PC users running MS-DOS. * GNU/Linux:: PC users running GNU/Linux. * Unix:: Using for the key on Unix systems.  File: edt, Node: Sun workstations, Next: MS-DOS, Up: Platform-specific notes 4.1 Sun Workstations Running X ============================== Some earlier Sun keyboards do not have arrow keys separate from the keypad keys. It is difficult to emulate the full EDT keypad and still retain use of the arrow keys on such keyboards. The Sun Type 5 and other more recent Sun keyboards, however, do have separate arrow keys. This makes them candidates for setting up a reasonable EDT keypad emulation. Depending upon the configuration of the version of X installed on your system, you may find the default X keynames for the keypad keys don't permit Emacs to interpret some or all the keypad keys as something other than arrow keys, numeric keys, , , etc. Both Sun and HP have been particularly guilty of making bizarre keysym assignments to the keypad keys. In most cases, the X Windows command, `xmodmap', can be used to correct the problem. Here's a sample `.xmodmaprc' file which corrects this problem on one Sun workstation configuration using an older SunOS release configured with a Sun Type 5 keyboard: ! File: .xmodmaprc ! ! Set up Sun Type 5 keypad for use with the GNU Emacs EDT Emulation ! keycode 53 = KP_Divide keycode 54 = KP_Multiply keycode 57 = KP_Decimal keycode 75 = KP_7 keycode 76 = KP_8 keycode 77 = KP_9 keycode 78 = KP_Subtract keycode 97 = KP_Enter keycode 98 = KP_4 keycode 99 = KP_5 keycode 100 = KP_6 keycode 101 = KP_0 keycode 105 = F24 keycode 119 = KP_1 keycode 120 = KP_2 keycode 121 = KP_3 keycode 132 = KP_Add If `edt-mapper.el' does not recognize your keypad keys as unique keys, use the command `xmodmap -pke' to get a listing of the actual key codes and the keysyms mapped to them and then generate you own custom `.xmodmaprc' similar to the one above. Next, feed `.xmodmaprc' to the `xmodmap' command and all the Sun Type 5 keypad keys will now be configurable for the emulation of an LK-201 keypad (less the <,> key). In this example, the line keycode 105 = F24 changes the X Windows name of the keypad key to be known internally as the key. Doing so permits it to be configured to behave as the () key. The side effect of this change is that you will no longer have a key. If you are using other software under X which requires a key, then examine your keyboard and look for one you don't use and redefine it to be the key. Basically, you need to clear the key from being assigned as a modifier, assign it to the key of your choice, and then add it back as a modifier. (*note Unix:: for further help on how to do this.)  File: edt, Node: MS-DOS, Next: GNU/Linux, Prev: Sun workstations, Up: Platform-specific notes 4.2 PC Users Running MS-DOS =========================== By default, F1 is configured to emulate the () key. But can be used instead if you load a freeware TSR distributed with MS-Kermit, call `gold.com'. This was once distributed in a file called `gold22.zip' and came with the source code as well as a loadable binary image. (See `edt-pc.el' in the Emacs `lisp/emulation' directory for more information.)  File: edt, Node: GNU/Linux, Next: Unix, Prev: MS-DOS, Up: Platform-specific notes 4.3 PC Users Running GNU/Linux ============================== The default X server configuration varies from distribution to distribution and release to release of GNU/Linux. If your system fails to recognize the keypad keys as distinct keys, change the NumLock state, turning it on or off, as the case may be, then try again. If this doesn't solve your problem, you may have to modify the X keysym mappings with `xmodmap'. On one distribution on an Intel PC, the following `.xmodmaprc' set things up nicely. ! File: .xmodmaprc ! ! Set up PC keypad under GNU/Linux for the GNU Emacs EDT Emulation ! clear mod2 keycode 77 = F12 keycode 96 = Num_Lock Pointer_EnableKeys add mod2 = Num_Lock In this example, after feeding the file to the `xmodmap' command, the PC keypad key will be configurable for the emulation of the key. The PC keypad can now emulate an LK-201 keypad (less the comma key), the standard keyboard supplied with DEC terminals VT-200 and above. This `.xmodmaprc' file switches the role of the and keys. It has been tested on RedHat GNU/Linux 5.2. Other versions of GNU/Linux may require different keycodes. (*note Unix:: for further help on how to do this.) *Please note:* Remember, it may be necessary to have in one position (ON) or the other (OFF) for the PC keypad to emulate the LK-201 keypad properly.  File: edt, Node: Unix, Prev: GNU/Linux, Up: Platform-specific notes 4.4 General Notes on Using for the Key on Unix Systems ====================================================================== Making the physical key available for use in the EDT Emulation requires some modification to the default X Window settings. Since the keycode assignments vary from system to system, some investigation is needed to see how to do this on a particular system. You will need to look at the output generated by `xmodmap' invoked with the "-pm" switch. For example, on RedHat GNU/Linux 5.2 on a PC, we get the following output when running `xmodmap -pm': xmodmap: up to 2 keys per modifier, (keycodes in parentheses): shift Shift_L (0x32), Shift_R (0x3e) lock Caps_Lock (0x42) control Control_L (0x25), Control_R (0x6d) mod1 Alt_L (0x40), Alt_R (0x71) mod2 Num_Lock (0x4d) mod3 mod4 mod5 Scroll_Lock (0x4e) Note that Num_Lock is assigned to the modifier `mod2'. This is what hides Num_Lock from being seen by Emacs. Now, `xmodmap -pke' yields: . . . keycode 77 = Num_Lock Pointer_EnableKeys . . . keycode 96 = F12 . . . So, in RedHat GNU/Linux 5.2 on a PC, Num_Lock generates keycode 77. The following steps are taken: 1. clear the assignment of Num_Lock to mod2; 2. swap the keycodes assigned to F12 and Num_Lock; 3. assign Num_Lock back to mod2. The `.xmodmaprc' file looks like this: ! File: .xmodmaprc ! ! Set up PC keypad under GNU/Linux for the GNU Emacs EDT Emulation ! clear mod2 keycode 77 = F12 keycode 96 = Num_Lock Pointer_EnableKeys add mod2 = Num_Lock So, after executing `xmodmap .xmodmaprc', a press of the physical key looks like a Num_Lock keypress to X. Also, a press of the physical key looks like a press of the key to X. Now, `edt-mapper.el' will see `f12' when the physical key is pressed, allowing the key to be used as the EDT () key.  File: edt, Node: Differences, Next: Highlights, Prev: Platform-specific notes, Up: Top 5 How Does this EDT Emulation Differ from Real EDT? *************************************************** In general, you will find that this emulation of EDT replicates most, but not all, of EDT's most used Keypad Mode editing functions and behavior. It is not perfect, but most EDT users who have tried the emulation agree that it is quite good enough to make it easy for die-hard EDT users to move over to using GNU Emacs. Here's a list of the most important differences between EDT and this GNU Emacs EDT Emulation. The list is short but you must be aware of these differences if you are to use the EDT Emulation effectively. 1. Entering repeat counts works a little differently than in EDT. EDT allows users to enter a repeat count before entering a command that accepts repeat counts. For example, when using the real EDT, pressing these three keys in sequence, `GOLD 5 KP1', will move the cursor in the current direction 5 words. This does *not* work in Emacs! Emacs provides two ways to enter repeat counts and neither involves using the key. First, repeat counts can be entered in Emacs by using the key. For example, pressing these keys in sequence, `ESC 1 0 KP1', will move the cursor in the current direction 10 words. Second, Emacs provides another command called `universal-argument' that can be used to do the same thing. Normally, in Emacs has this bound to `C-u'. 2. EDT's line mode commands and nokeypad mode commands are *not* supported (with one important exception; see item 8 in *note Highlights::). Although, at first, this may seem like a big omission, the set of built-in Emacs commands provides a much richer set of capabilities which more than make up for this omission. To enter Emacs commands not bound to keys, you can press `GOLD KP7' or the key. Emacs will display its own command prompt "M-x". This stands for the keypress `Meta-x', where is a special shift key. The key is often mapped to behave as a key. So, you can also invoke this prompt by pressing `Meta-x'. Typing the sequence `ESC x' will also invoke the prompt. 3. Selected text is highlighted *only* on systems where Emacs supports the highlighting of text. 4. Just like in TPU/EVE, the key is *not* used to terminate input when the editor prompts you for input. The key is used, instead. ( and (the direction keys) do terminate input for the `FIND' command, just like in EDT, however.)  File: edt, Node: Highlights, Next: Customizing, Prev: Differences, Up: Top 6 Some Highlights, and Comparisons to the Original Emacs EDT Emulation ********************************************************************** 1. The EDT define key command is supported (`edt-define-key') and is bound to `C-k' in the default EDT mode when EDT control sequence bindings are enabled, or when the sample `edt-user.el' customization file is used. The TPU/EVE learn command is supported but not bound to a key in the default EDT mode but is bound in the sample `edt-user.el' file. Unlike the TPU/EVE learn command, which uses one key to begin the learn sequence, `C-l', and another command to remember the sequence, `C-r', this version of the learn command (`edt-learn') serves as a toggle to both begin and to remember the learn sequence. Many users who change the meaning of a key with the define key and the learn commands, would like to be able to restore the original key binding without having to quit and restart emacs. So a restore key command is provided to do just that. When invoked, it prompts you to press the key to which you wish the last replaced key definition restored. It is bound to `GOLD C-k' in the default EDT mode when EDT control sequence bindings are enabled or the sample `edt-user.el' customization file is used. 2. Direction support is fully supported. 3. All original Emacs bindings are fully restored when EDT emulation is turned off. So, if a fellow worker comes over to your terminal to help you with a software problem, for example, and is completely confused by your EDT emulation bindings, just enter the command, `edt-emulation-off', at the `M-x' prompt and the original Emacs bindings will be restored. To resume the EDT emulation, just enter `edt-emulation-on'. 4. User custom EDT bindings are kept separate from the default EDT bindings. One can toggle back and forth between the custom EDT bindings and default EDT bindings. 5. The Emacs functions in `edt.el' attempt to emulate, where practical, the exact behavior of the corresponding EDT keypad mode commands. In a few cases, the emulation is not exact, but we hope you will agree it is close enough. In a very few cases, we chose to use the Emacs way of handling things. As mentioned earlier, we do not emulate the EDT `SUBS' command. Instead, we chose to use the Emacs `query-replace' function, which we find to be easier to use. 6. Emacs uses the regexp assigned to `page-delimiter' to determine what marks a page break. This is normally `^\f', which causes the `edt-page' command to ignore form feeds not located at the beginning of a line. To emulate the EDT `PAGE' command exactly, page-delimiter is set to `\f' when EDT emulation is turned on, and restored to `^\f' when EDT emulation is turned off. But, since some users prefer the Emacs definition of a page break, or may wish to preserve a customized definition of page break, one can override the EDT definition by placing (setq edt-keep-current-page-delimiter t) in your `.emacs' file. Or, you can used the Emacs customize command to change its setting. 7. The EDT definition of a section of a terminal window is hardwired to be 16 lines of its one-and-only 24-line window (the EDT `SECT' command bound to ). That's two-thirds of the window at a time. Since Emacs, like TPU/EVE, can handle multiple windows of sizes of other than 24 lines, the definition of section used here has been modified to two-thirds of the current window. (There is also an `edt-scroll-window' function which you may prefer over the `SECT' emulation.) 8. Cursor movement and deletion involving word entities is identical to EDT. This, above all else, gives the die-hard EDT user a sense of being at home. Also, an emulation of EDT's `SET ENTITY WORD' command is provided, for those users who like to customize movement by a word at a time to their own liking. 9. EDT's `FIND' and `FNDNXT' are supported. 10. EDT's `APPEND', `REPLACE', and `SUBS' commands are supported. 11. `CHNGCASE' is supported. It works on individual characters or selected text, if `SELECT' is active. In addition, two new commands are provided: `edt-lowercase' and `edt-uppercase'. They work on individual *words* or selected text, if `SELECT' is active. 12. Form feed and tab insert commands are supported. 13. A new command, `edt-duplicate-word', is provided. If you experiment with it, you might find it to be surprisingly useful and may wonder how you ever got along without it! It is assigned to `C-j' in the sample `edt-user.el' customization file. 14. TPU/EVE's Rectangular Cut and Paste functions (originally from the EVE-Plus package) are supported. But unlike the TPU/EVE versions, these here support both insert and overwrite modes. The seven rectangular functions are bound to , , `GOLD-F8', , `GOLD-F9', , and `GOLD-F10' in the default EDT mode. 15. The original EDT emulation package set up many default regular and GOLD bindings. We tried to preserve most (but not all!) of these, so users of the original emulation package will feel more at home. Nevertheless, there are still many GOLD key sequences which are not bound to any functions. These are prime candidates to use for your own customizations. Also, there are several commands in `edt.el' not bound to any key. So, you will find it worthwhile to look through `edt.el' for functions you may wish to add to your personal customized bindings. 16. The VT200/VT300 series terminals steal the function keys to for their own use. These do not generate signals which are sent to the host. So, `edt.el' does not assign any default bindings to through . In addition, our VT220 terminals generate an interrupt when the key is pressed (`^C' or `^Y', can't remember which) and not the character sequence documented in the manual. So, binding Emacs commands to will not work if your terminal behaves the same way. 17. The VT220 terminal has no , , nor keys, as does a VT100. So the default EDT bindings adopt the standard DEC convention of having the , , and keys, on a VT200 series (and above) terminal, assigned to the same EDT functions that are bound to , , and on a VT100 terminal. 18. Each user, through the use of a private `edt-user.el' file, can customize, very easily, personal EDT emulation bindings. 19. The EDT `SELECT' and `RESET' functions are supported. However, unlike EDT, pressing `RESET' to cancel text selection does *not* reset the existing setting of the current direction. We also provide a TPU/EVE like version of the single `SELECT/RESET' function, called `edt-toggle-select', which makes the EDT `SELECT' function into a toggle on/off switch. That is, if selection is on, pressing `SELECT' again turns selection off (cancels selection). This function is used in the sample `edt-user.el' customization file. 20. EDT scroll margins are supported, but are disabled by default. (*note Scroll margins:: for instructions on how to enable them.)  File: edt, Node: Customizing, Next: GNU Free Documentation License, Prev: Highlights, Up: Top 7 Customizing Emulation *********************** Most EDT users, at one time or another, make some custom key bindings, or use someone else's custom key bindings, which they come to depend upon just as if they were built-in bindings. This EDT Emulation for GNU Emacs is designed to make it easy to customize bindings. If you wish to customize the EDT Emulation to use some of your own key bindings, you need to make a private version of `edt-user.el' in your own private lisp directory. The Emacs `etc/' directory contains an example for you to use as a template and for ideas. First, you need to have your own private lisp directory, say `~/lisp', and you should add it to the GNU Emacs load path. *Please note:* A few sites have different load-path requirements, so the above directions may need some modification if your site has such special needs. * Menu: * edt-user.el:: Creating your own `edt-user.el' file. * Words:: Specifying word entities. * Control keys:: Enabling EDT control key sequence bindings. * Scroll margins:: Setting scroll margins.  File: edt, Node: edt-user.el, Next: Words, Up: Customizing 7.1 Creating your own `edt-user.el' File ======================================== A sample `edt-user.el' file is provided in the Emacs `etc/' directory. You should use it as a guide to learn how you can customize EDT emulation bindings to your own liking. Names used to identify the set of LK-201 keypad and function keys are: Keypad Keys: PF1 PF2 PF3 PF4 KP7 KP8 KP9 KP- KP4 KP5 KP6 KP, KP1 KP2 KP3 KP0 KPP KPE Arrow Keys: LEFT RIGHT DOWN UP Function Keys: F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 HELP DO F17 F18 F19 F20 FIND INSERT REMOVE SELECT PREVIOUS NEXT Note: Many VT-200 terminals, and above, steal function keys through for terminal setup control and don't send anything to the host if pressed. So customizing bindings to these keys may not work for you. There are three basic functions that do the EDT emulation custom bindings: `edt-bind-key', `edt-bind-gold-key', and `edt-bind-function-key'. The first two are for binding functions to keys which are standard across most keyboards. This makes them keyboard independent, making it possible to define these key bindings for all terminals in the file `edt.el'. The first, `edt-bind-key', is used typically to bind emacs commands to control keys, although some people use it to bind commands to other keys, as well. (For example, some people use it to bind the VT200 seldom used back-tick key (``') to the function `ESC-prefix' so it will behave like an key.) The second function, `edt-bind-gold-key', is used to bind emacs commands to gold key sequences involving alpha-numeric keys, special character keys, and control keys. The third function, `edt-bind-function-key', is terminal dependent and is defined in a terminal specific file (see `edt-vt100.el' for example). It is used to bind emacs commands to LK-201 function keys, to keypad keys, and to gold sequences of those keys.  File: edt, Node: Words, Next: Control keys, Prev: edt-user.el, Up: Customizing 7.2 Specifying Word Entities ============================ The variable `edt-word-entities' is used to emulate EDT's `SET ENTITY WORD' command. It contains a list of characters to be treated as words in themselves. If the user does not define `edt-word-entities' in his/her `.emacs' file, then it is set up with the EDT default containing only . The characters are stored in the list by their numerical values, not as strings. Emacs supports several ways to specify the numerical value of a character. One method is to use the question mark: `?A' means the numerical value for `A', `?/' means the numerical value for `/', and so on. Several unprintable characters have special representations: ?\b specifies BS, C-h ?\t specifies TAB, C-i ?\n specifies LFD, C-j ?\v specifies VTAB, C-k ?\f specifies FF, C-l ?\r specifies CR, C-m ?\e specifies ESC, C-[ ?\\ specifies \ Here are some examples: (setq edt-word-entities '(?\t ?- ?/)) ; specifies TAB, - , and / (setq edt-word-entities '(?\t) ; specifies TAB, the default You can also specify characters by their decimal ascii values: (setq edt-word-entities '(9 45 47)) ; specifies TAB, - , and /  File: edt, Node: Control keys, Next: Scroll margins, Prev: Words, Up: Customizing 7.3 Enabling EDT Control Key Sequence Bindings ============================================== Where EDT key bindings and GNU Emacs key bindings conflict, the default GNU Emacs key bindings are retained by default. Some diehard EDT users may not like this. So, if the variable `edt-use-EDT-control-key-bindings' is set to true in a user's `.emacs' file, then the default EDT Emulation mode will enable most of the original EDT control key sequence bindings. If you wish to do this, add the following line to your `.emacs' file: (setq edt-use-EDT-control-key-bindings t)  File: edt, Node: Scroll margins, Prev: Control keys, Up: Customizing 7.4 Setting Scroll Margins ========================== Scroll margins at the top and bottom of the window are now supported. (The design was copied from `tpu-extras.el'.) By default, this feature is enabled with the top margin set to 10% of the window and the bottom margin set to 15% of the window. To change these settings, you can invoke the function `edt-set-scroll-margins' in your `.emacs' file. For example, the following line (edt-set-scroll-margins "20%" "25%") sets the top margin to 20% of the window and the bottom margin to 25% of the window. To disable this feature, set each margin to 0%. You can also invoke `edt-set-scroll-margins' interactively while EDT Emulation is active to change the settings for that session. *Please note:* Another way to set the scroll margins is to use the Emacs customization feature (not available in Emacs 19) to set the following two variables directly: `edt-top-scroll-margin' and `edt-bottom-scroll-margin'. Enter the Emacs `customize' command. First select the `Editing' group and then select the `Emulations' group. Finally, select the `Edt' group and follow the directions.  File: edt, Node: GNU Free Documentation License, Prev: Customizing, Up: Top Appendix A GNU Free Documentation License ***************************************** Version 1.3, 3 November 2008 Copyright (C) 2000, 2001, 2002, 2007, 2008, 2009 Free Software Foundation, Inc. `http://fsf.org/' Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 0. PREAMBLE The purpose of this License is to make a manual, textbook, or other functional and useful document "free" in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others. This License is a kind of "copyleft", which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software. We have designed this License in order to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. 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The operator of an MMC Site may republish an MMC contained in the site under CC-BY-SA on the same site at any time before August 1, 2009, provided the MMC is eligible for relicensing. ADDENDUM: How to use this License for your documents ==================================================== To use this License in a document you have written, include a copy of the License in the document and put the following copyright and license notices just after the title page: Copyright (C) YEAR YOUR NAME. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''. If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace the "with...Texts." line with this: with the Invariant Sections being LIST THEIR TITLES, with the Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. If you have Invariant Sections without Cover Texts, or some other combination of the three, merge those two alternatives to suit the situation. If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software.  Tag Table: Node: Top1047 Node: Overview2662 Node: Quick start3413 Node: Changes4709 Node: Goals8756 Node: Supported terminals9983 Node: Starting emulation11101 Node: Platform-specific notes13220 Node: Sun workstations13629 Node: MS-DOS16426 Node: GNU/Linux16960 Node: Unix18479 Node: Differences20666 Node: Highlights23375 Node: Customizing30968 Node: edt-user.el32179 Node: Words34378 Node: Control keys35711 Node: Scroll margins36380 Node: GNU Free Documentation License37604  End Tag Table