New Lisp manual nodes, Applying Customizations and Custom Themes.
[bpt/emacs.git] / doc / lispref / vol1.texi
1 \input texinfo @c -*-texinfo-*-
2 @c This file is used for printing the GNU Emacs Lisp Reference Manual
3 @c in two volumes. It is a modified version of elisp.texi.
4 @c Copyright (C) 1990-1995, 1998-1999, 2001-2012
5 @c Free Software Foundation, Inc.
6 @c %**start of header
7 @setfilename elisp
8 @settitle GNU Emacs Lisp Reference Manual: Volume 1
9 @c %**end of header
10
11 @c See two-volume-cross-refs.txt.
12 @tex
13 \message{Formatting for two volume edition...Volume 1...}
14 %
15 % Read special toc file, set up in two-volume.make.
16 \gdef\tocreadfilename{elisp1-toc-ready.toc}
17 %
18 % Don't make outlines, they're not needed and \readdatafile can't pay
19 % attention to the special definition above.
20 \global\let\pdfmakeoutlines=\relax
21 %
22 % Start volume 1 chapter numbering at 1; this must be listed as chapno0.
23 \global\chapno=0
24 @end tex
25
26 @c Version of the manual and of Emacs.
27 @c Please remember to update the edition number in README as well.
28 @set VERSION 3.0
29 @include emacsver.texi
30 @set DATE July 2009
31
32 @dircategory Emacs
33 @direntry
34 * Elisp: (elisp). The Emacs Lisp Reference Manual.
35 @end direntry
36
37 @c in general, keep the following line commented out, unless doing a
38 @c copy of this manual that will be published. the manual should go
39 @c onto the distribution in the full, 8.5 x 11" size.
40 @set smallbook
41
42 @ifset smallbook
43 @smallbook
44 @end ifset
45
46 @c per rms and peterb, use 10pt fonts for the main text, mostly to
47 @c save on paper cost.
48 @c Do this inside @tex for now, so current makeinfo does not complain.
49 @tex
50 @ifset smallbook
51 @fonttextsize 10
52 \global\let\urlcolor=\Black % don't print links in grayscale
53 \global\let\linkcolor=\Black
54 @end ifset
55 \global\hbadness=6666 % don't worry about not-too-underfull boxes
56 @end tex
57
58 @c Combine indices.
59 @synindex cp fn
60 @syncodeindex vr fn
61 @syncodeindex ky fn
62 @syncodeindex pg fn
63 @c We use the "type index" to index new functions and variables.
64 @c @syncodeindex tp fn
65
66 @copying
67 This is edition @value{VERSION} of the GNU Emacs Lisp Reference Manual,@*
68 corresponding to Emacs version @value{EMACSVER}.
69
70 Copyright @copyright{} 1990-1996, 1998-2012 Free Software Foundation, Inc.
71
72 @quotation
73 Permission is granted to copy, distribute and/or modify this document
74 under the terms of the GNU Free Documentation License, Version 1.3 or
75 any later version published by the Free Software Foundation; with the
76 Invariant Sections being ``GNU General Public License,'' with the
77 Front-Cover texts being ``A GNU Manual,'' and with the Back-Cover
78 Texts as in (a) below. A copy of the license is included in the
79 section entitled ``GNU Free Documentation License.''
80
81 (a) The FSF's Back-Cover Text is: ``You have the freedom to copy and
82 modify this GNU manual. Buying copies from the FSF supports it in
83 developing GNU and promoting software freedom.''
84 @end quotation
85 @end copying
86
87 @titlepage
88 @title GNU Emacs Lisp Reference Manual
89 @subtitle Volume 1
90 @subtitle For Emacs Version @value{EMACSVER}
91 @subtitle Revision @value{VERSION}, @value{DATE}
92
93 @author by Bil Lewis, Dan LaLiberte, Richard Stallman
94 @author and the GNU Manual Group
95 @page
96 @vskip 0pt plus 1filll
97 @insertcopying
98
99 @sp 2
100
101 Published by the Free Software Foundation @*
102 51 Franklin St, Fifth Floor @*
103 Boston, MA 02110-1301 @*
104 USA @*
105 ISBN 1-882114-74-4
106
107 @sp 2
108 Cover art by Etienne Suvasa.
109 @end titlepage
110
111
112 @c Print the tables of contents
113 @summarycontents
114 @contents
115
116
117 @ifnottex
118 @node Top, Introduction, (dir), (dir)
119 @top Emacs Lisp
120
121 This Info file contains edition @value{VERSION} of the GNU Emacs Lisp
122 Reference Manual, corresponding to GNU Emacs version @value{EMACSVER}.
123 @end ifnottex
124
125 @menu
126 * Introduction:: Introduction and conventions used.
127
128 * Lisp Data Types:: Data types of objects in Emacs Lisp.
129 * Numbers:: Numbers and arithmetic functions.
130 * Strings and Characters:: Strings, and functions that work on them.
131 * Lists:: Lists, cons cells, and related functions.
132 * Sequences Arrays Vectors:: Lists, strings and vectors are called sequences.
133 Certain functions act on any kind of sequence.
134 The description of vectors is here as well.
135 * Hash Tables:: Very fast lookup-tables.
136 * Symbols:: Symbols represent names, uniquely.
137
138 * Evaluation:: How Lisp expressions are evaluated.
139 * Control Structures:: Conditionals, loops, nonlocal exits.
140 * Variables:: Using symbols in programs to stand for values.
141 * Functions:: A function is a Lisp program
142 that can be invoked from other functions.
143 * Macros:: Macros are a way to extend the Lisp language.
144 * Customization:: Making variables and faces customizable.
145
146 * Loading:: Reading files of Lisp code into Lisp.
147 * Byte Compilation:: Compilation makes programs run faster.
148 * Advising Functions:: Adding to the definition of a function.
149 * Debugging:: Tools and tips for debugging Lisp programs.
150
151 * Read and Print:: Converting Lisp objects to text and back.
152 * Minibuffers:: Using the minibuffer to read input.
153 * Command Loop:: How the editor command loop works,
154 and how you can call its subroutines.
155 * Keymaps:: Defining the bindings from keys to commands.
156 * Modes:: Defining major and minor modes.
157 * Documentation:: Writing and using documentation strings.
158
159 * Files:: Accessing files.
160 * Backups and Auto-Saving:: Controlling how backups and auto-save
161 files are made.
162 * Buffers:: Creating and using buffer objects.
163 * Windows:: Manipulating windows and displaying buffers.
164 * Frames:: Making multiple system-level windows.
165 * Positions:: Buffer positions and motion functions.
166 * Markers:: Markers represent positions and update
167 automatically when the text is changed.
168
169 * Text:: Examining and changing text in buffers.
170 * Non-ASCII Characters:: Non-ASCII text in buffers and strings.
171 * Searching and Matching:: Searching buffers for strings or regexps.
172 * Syntax Tables:: The syntax table controls word and list parsing.
173 * Abbrevs:: How Abbrev mode works, and its data structures.
174
175 * Processes:: Running and communicating with subprocesses.
176 * Display:: Features for controlling the screen display.
177 * System Interface:: Getting the user id, system type, environment
178 variables, and other such things.
179
180 * Packaging:: Preparing Lisp code for distribution.
181
182 Appendices
183
184 * Antinews:: Info for users downgrading to Emacs 23.
185 * GNU Free Documentation License:: The license for this documentation.
186 * GPL:: Conditions for copying and changing GNU Emacs.
187 * Tips:: Advice and coding conventions for Emacs Lisp.
188 * GNU Emacs Internals:: Building and dumping Emacs;
189 internal data structures.
190 * Standard Errors:: List of some standard error symbols.
191 * Standard Keymaps:: List of some standard keymaps.
192 * Standard Hooks:: List of some standard hook variables.
193
194 * Index:: Index including concepts, functions, variables,
195 and other terms.
196
197 @ignore
198 * New Symbols:: New functions and variables in Emacs @value{EMACSVER}.
199 @end ignore
200
201 @c Do NOT modify the following 3 lines! They must have this form to
202 @c be correctly identified by `texinfo-multiple-files-update'. In
203 @c particular, the detailed menu header line MUST be identical to the
204 @c value of `texinfo-master-menu-header'. See texnfo-upd.el.
205
206 @detailmenu
207 --- The Detailed Node Listing ---
208 ---------------------------------
209
210 Here are other nodes that are subnodes of those already listed,
211 mentioned here so you can get to them in one step:
212
213 Introduction
214
215 * Caveats:: Flaws and a request for help.
216 * Lisp History:: Emacs Lisp is descended from Maclisp.
217 * Conventions:: How the manual is formatted.
218 * Version Info:: Which Emacs version is running?
219 * Acknowledgements:: The authors, editors, and sponsors of this manual.
220
221 Conventions
222
223 * Some Terms:: Explanation of terms we use in this manual.
224 * nil and t:: How the symbols @code{nil} and @code{t} are used.
225 * Evaluation Notation:: The format we use for examples of evaluation.
226 * Printing Notation:: The format we use when examples print text.
227 * Error Messages:: The format we use for examples of errors.
228 * Buffer Text Notation:: The format we use for buffer contents in examples.
229 * Format of Descriptions:: Notation for describing functions, variables, etc.
230
231 Format of Descriptions
232
233 * A Sample Function Description:: A description of an imaginary
234 function, @code{foo}.
235 * A Sample Variable Description:: A description of an imaginary
236 variable, @code{electric-future-map}.
237
238 Lisp Data Types
239
240 * Printed Representation:: How Lisp objects are represented as text.
241 * Comments:: Comments and their formatting conventions.
242 * Programming Types:: Types found in all Lisp systems.
243 * Editing Types:: Types specific to Emacs.
244 * Circular Objects:: Read syntax for circular structure.
245 * Type Predicates:: Tests related to types.
246 * Equality Predicates:: Tests of equality between any two objects.
247
248 Programming Types
249
250 * Integer Type:: Numbers without fractional parts.
251 * Floating Point Type:: Numbers with fractional parts and with a large range.
252 * Character Type:: The representation of letters, numbers and
253 control characters.
254 * Symbol Type:: A multi-use object that refers to a function,
255 variable, or property list, and has a unique identity.
256 * Sequence Type:: Both lists and arrays are classified as sequences.
257 * Cons Cell Type:: Cons cells, and lists (which are made from cons cells).
258 * Array Type:: Arrays include strings and vectors.
259 * String Type:: An (efficient) array of characters.
260 * Vector Type:: One-dimensional arrays.
261 * Char-Table Type:: One-dimensional sparse arrays indexed by characters.
262 * Bool-Vector Type:: One-dimensional arrays of @code{t} or @code{nil}.
263 * Hash Table Type:: Super-fast lookup tables.
264 * Function Type:: A piece of executable code you can call from elsewhere.
265 * Macro Type:: A method of expanding an expression into another
266 expression, more fundamental but less pretty.
267 * Primitive Function Type:: A function written in C, callable from Lisp.
268 * Byte-Code Type:: A function written in Lisp, then compiled.
269 * Autoload Type:: A type used for automatically loading seldom-used
270 functions.
271
272 Character Type
273
274 * Basic Char Syntax:: Syntax for regular characters.
275 * General Escape Syntax:: How to specify characters by their codes.
276 * Ctl-Char Syntax:: Syntax for control characters.
277 * Meta-Char Syntax:: Syntax for meta-characters.
278 * Other Char Bits:: Syntax for hyper-, super-, and alt-characters.
279
280 Cons Cell and List Types
281
282 * Box Diagrams:: Drawing pictures of lists.
283 * Dotted Pair Notation:: A general syntax for cons cells.
284 * Association List Type:: A specially constructed list.
285
286 String Type
287
288 * Syntax for Strings:: How to specify Lisp strings.
289 * Non-ASCII in Strings:: International characters in strings.
290 * Nonprinting Characters:: Literal unprintable characters in strings.
291 * Text Props and Strings:: Strings with text properties.
292
293 Editing Types
294
295 * Buffer Type:: The basic object of editing.
296 * Marker Type:: A position in a buffer.
297 * Window Type:: Buffers are displayed in windows.
298 * Frame Type:: Windows subdivide frames.
299 * Terminal Type:: A terminal device displays frames.
300 * Window Configuration Type:: Recording the way a frame is subdivided.
301 * Frame Configuration Type:: Recording the status of all frames.
302 * Process Type:: A subprocess of Emacs running on the underlying OS.
303 * Stream Type:: Receive or send characters.
304 * Keymap Type:: What function a keystroke invokes.
305 * Overlay Type:: How an overlay is represented.
306 * Font Type:: Fonts for displaying text.
307
308 Numbers
309
310 * Integer Basics:: Representation and range of integers.
311 * Float Basics:: Representation and range of floating point.
312 * Predicates on Numbers:: Testing for numbers.
313 * Comparison of Numbers:: Equality and inequality predicates.
314 * Numeric Conversions:: Converting float to integer and vice versa.
315 * Arithmetic Operations:: How to add, subtract, multiply and divide.
316 * Rounding Operations:: Explicitly rounding floating point numbers.
317 * Bitwise Operations:: Logical and, or, not, shifting.
318 * Math Functions:: Trig, exponential and logarithmic functions.
319 * Random Numbers:: Obtaining random integers, predictable or not.
320
321 Strings and Characters
322
323 * String Basics:: Basic properties of strings and characters.
324 * Predicates for Strings:: Testing whether an object is a string or char.
325 * Creating Strings:: Functions to allocate new strings.
326 * Modifying Strings:: Altering the contents of an existing string.
327 * Text Comparison:: Comparing characters or strings.
328 * String Conversion:: Converting to and from characters and strings.
329 * Formatting Strings:: @code{format}: Emacs's analogue of @code{printf}.
330 * Case Conversion:: Case conversion functions.
331 * Case Tables:: Customizing case conversion.
332
333 Lists
334
335 * Cons Cells:: How lists are made out of cons cells.
336 * List-related Predicates:: Is this object a list? Comparing two lists.
337 * List Elements:: Extracting the pieces of a list.
338 * Building Lists:: Creating list structure.
339 * List Variables:: Modifying lists stored in variables.
340 * Modifying Lists:: Storing new pieces into an existing list.
341 * Sets And Lists:: A list can represent a finite mathematical set.
342 * Association Lists:: A list can represent a finite relation or mapping.
343 * Rings:: Managing a fixed-size ring of objects.
344
345 Modifying Existing List Structure
346
347 * Setcar:: Replacing an element in a list.
348 * Setcdr:: Replacing part of the list backbone.
349 This can be used to remove or add elements.
350 * Rearrangement:: Reordering the elements in a list; combining lists.
351
352 Sequences, Arrays, and Vectors
353
354 * Sequence Functions:: Functions that accept any kind of sequence.
355 * Arrays:: Characteristics of arrays in Emacs Lisp.
356 * Array Functions:: Functions specifically for arrays.
357 * Vectors:: Special characteristics of Emacs Lisp vectors.
358 * Vector Functions:: Functions specifically for vectors.
359 * Char-Tables:: How to work with char-tables.
360 * Bool-Vectors:: How to work with bool-vectors.
361
362 Hash Tables
363
364 * Creating Hash:: Functions to create hash tables.
365 * Hash Access:: Reading and writing the hash table contents.
366 * Defining Hash:: Defining new comparison methods.
367 * Other Hash:: Miscellaneous.
368
369 Symbols
370
371 * Symbol Components:: Symbols have names, values, function definitions
372 and property lists.
373 * Definitions:: A definition says how a symbol will be used.
374 * Creating Symbols:: How symbols are kept unique.
375 * Property Lists:: Each symbol has a property list
376 for recording miscellaneous information.
377
378 Property Lists
379
380 * Plists and Alists:: Comparison of the advantages of property
381 lists and association lists.
382 * Symbol Plists:: Functions to access symbols' property lists.
383 * Other Plists:: Accessing property lists stored elsewhere.
384
385 Evaluation
386
387 * Intro Eval:: Evaluation in the scheme of things.
388 * Forms:: How various sorts of objects are evaluated.
389 * Quoting:: Avoiding evaluation (to put constants in
390 the program).
391 * Backquote:: Easier construction of list structure.
392 * Eval:: How to invoke the Lisp interpreter explicitly.
393
394 Kinds of Forms
395
396 * Self-Evaluating Forms:: Forms that evaluate to themselves.
397 * Symbol Forms:: Symbols evaluate as variables.
398 * Classifying Lists:: How to distinguish various sorts of list forms.
399 * Function Indirection:: When a symbol appears as the car of a list,
400 we find the real function via the symbol.
401 * Function Forms:: Forms that call functions.
402 * Macro Forms:: Forms that call macros.
403 * Special Forms:: "Special forms" are idiosyncratic primitives,
404 most of them extremely important.
405 * Autoloading:: Functions set up to load files
406 containing their real definitions.
407
408 Control Structures
409
410 * Sequencing:: Evaluation in textual order.
411 * Conditionals:: @code{if}, @code{cond}, @code{when}, @code{unless}.
412 * Combining Conditions:: @code{and}, @code{or}, @code{not}.
413 * Iteration:: @code{while} loops.
414 * Nonlocal Exits:: Jumping out of a sequence.
415
416 Nonlocal Exits
417
418 * Catch and Throw:: Nonlocal exits for the program's own purposes.
419 * Examples of Catch:: Showing how such nonlocal exits can be written.
420 * Errors:: How errors are signaled and handled.
421 * Cleanups:: Arranging to run a cleanup form if an
422 error happens.
423
424 Errors
425
426 * Signaling Errors:: How to report an error.
427 * Processing of Errors:: What Emacs does when you report an error.
428 * Handling Errors:: How you can trap errors and continue execution.
429 * Error Symbols:: How errors are classified for trapping them.
430
431 Variables
432
433 * Global Variables:: Variable values that exist permanently, everywhere.
434 * Constant Variables:: Certain "variables" have values that never change.
435 * Local Variables:: Variable values that exist only temporarily.
436 * Void Variables:: Symbols that lack values.
437 * Defining Variables:: A definition says a symbol is used as a variable.
438 * Tips for Defining:: Things you should think about when you
439 define a variable.
440 * Accessing Variables:: Examining values of variables whose names
441 are known only at run time.
442 * Setting Variables:: Storing new values in variables.
443 * Variable Scoping:: How Lisp chooses among local and global values.
444 * Buffer-Local Variables:: Variable values in effect only in one buffer.
445 * File Local Variables:: Handling local variable lists in files.
446 * Directory Local Variables:: Local variables common to all files in a
447 directory.
448 * Frame-Local Variables:: Frame-local bindings for variables.
449 * Variable Aliases:: Variables that are aliases for other variables.
450 * Variables with Restricted Values:: Non-constant variables whose value can
451 @emph{not} be an arbitrary Lisp object.
452
453 Scoping Rules for Variable Bindings
454
455 * Scope:: Scope means where in the program a value
456 is visible. Comparison with other languages.
457 * Extent:: Extent means how long in time a value exists.
458 * Impl of Scope:: Two ways to implement dynamic scoping.
459 * Using Scoping:: How to use dynamic scoping carefully and
460 avoid problems.
461
462 Buffer-Local Variables
463
464 * Intro to Buffer-Local:: Introduction and concepts.
465 * Creating Buffer-Local:: Creating and destroying buffer-local bindings.
466 * Default Value:: The default value is seen in buffers
467 that don't have their own buffer-local values.
468
469 Functions
470
471 * What Is a Function:: Lisp functions vs. primitives; terminology.
472 * Lambda Expressions:: How functions are expressed as Lisp objects.
473 * Function Names:: A symbol can serve as the name of a function.
474 * Defining Functions:: Lisp expressions for defining functions.
475 * Calling Functions:: How to use an existing function.
476 * Mapping Functions:: Applying a function to each element of a list, etc.
477 * Anonymous Functions:: Lambda expressions are functions with no names.
478 * Function Cells:: Accessing or setting the function definition
479 of a symbol.
480 * Closures:: Functions that enclose a lexical environment.
481 * Obsolete Functions:: Declaring functions obsolete.
482 * Inline Functions:: Defining functions that the compiler
483 will open code.
484 * Declaring Functions:: Telling the compiler that a function is defined.
485 * Function Safety:: Determining whether a function is safe to call.
486 * Related Topics:: Cross-references to specific Lisp primitives
487 that have a special bearing on how
488 functions work.
489
490 Lambda Expressions
491
492 * Lambda Components:: The parts of a lambda expression.
493 * Simple Lambda:: A simple example.
494 * Argument List:: Details and special features of argument lists.
495 * Function Documentation:: How to put documentation in a function.
496
497 Macros
498
499 * Simple Macro:: A basic example.
500 * Expansion:: How, when and why macros are expanded.
501 * Compiling Macros:: How macros are expanded by the compiler.
502 * Defining Macros:: How to write a macro definition.
503 * Problems with Macros:: Don't evaluate the macro arguments too many times.
504 Don't hide the user's variables.
505 * Indenting Macros:: Specifying how to indent macro calls.
506
507 Common Problems Using Macros
508
509 * Wrong Time:: Do the work in the expansion, not in the macro.
510 * Argument Evaluation:: The expansion should evaluate each macro arg once.
511 * Surprising Local Vars:: Local variable bindings in the expansion
512 require special care.
513 * Eval During Expansion:: Don't evaluate them; put them in the expansion.
514 * Repeated Expansion:: Avoid depending on how many times expansion is done.
515
516 Writing Customization Definitions
517
518 * Common Keywords:: Common keyword arguments for all kinds of
519 customization declarations.
520 * Group Definitions:: Writing customization group definitions.
521 * Variable Definitions:: Declaring user options.
522 * Customization Types:: Specifying the type of a user option.
523 * Applying Customizations:: Functions to apply customization settings.
524 * Custom Themes:: Writing Custom themes.
525
526 Customization Types
527
528 * Simple Types:: Simple customization types: sexp, integer, number,
529 string, file, directory, alist.
530 * Composite Types:: Build new types from other types or data.
531 * Splicing into Lists:: Splice elements into list with @code{:inline}.
532 * Type Keywords:: Keyword-argument pairs in a customization type.
533 * Defining New Types:: Give your type a name.
534
535 Loading
536
537 * How Programs Do Loading:: The @code{load} function and others.
538 * Load Suffixes:: Details about the suffixes that @code{load} tries.
539 * Library Search:: Finding a library to load.
540 * Loading Non-ASCII:: Non-@acronym{ASCII} characters in Emacs Lisp files.
541 * Autoload:: Setting up a function to autoload.
542 * Repeated Loading:: Precautions about loading a file twice.
543 * Named Features:: Loading a library if it isn't already loaded.
544 * Where Defined:: Finding which file defined a certain symbol.
545 * Unloading:: How to "unload" a library that was loaded.
546 * Hooks for Loading:: Providing code to be run when
547 particular libraries are loaded.
548
549 Byte Compilation
550
551 * Speed of Byte-Code:: An example of speedup from byte compilation.
552 * Compilation Functions:: Byte compilation functions.
553 * Docs and Compilation:: Dynamic loading of documentation strings.
554 * Dynamic Loading:: Dynamic loading of individual functions.
555 * Eval During Compile:: Code to be evaluated when you compile.
556 * Compiler Errors:: Handling compiler error messages.
557 * Byte-Code Objects:: The data type used for byte-compiled functions.
558 * Disassembly:: Disassembling byte-code; how to read byte-code.
559
560 Advising Emacs Lisp Functions
561
562 * Simple Advice:: A simple example to explain the basics of advice.
563 * Defining Advice:: Detailed description of @code{defadvice}.
564 * Around-Advice:: Wrapping advice around a function's definition.
565 * Computed Advice:: ...is to @code{defadvice} as @code{fset} is to @code{defun}.
566 * Activation of Advice:: Advice doesn't do anything until you activate it.
567 * Enabling Advice:: You can enable or disable each piece of advice.
568 * Preactivation:: Preactivation is a way of speeding up the
569 loading of compiled advice.
570 * Argument Access in Advice:: How advice can access the function's arguments.
571 * Combined Definition:: How advice is implemented.
572
573 Debugging Lisp Programs
574
575 * Debugger:: A debugger for the Emacs Lisp evaluator.
576 * Edebug:: A source-level Emacs Lisp debugger.
577 * Syntax Errors:: How to find syntax errors.
578 * Test Coverage:: Ensuring you have tested all branches in your code.
579
580 The Lisp Debugger
581
582 * Error Debugging:: Entering the debugger when an error happens.
583 * Infinite Loops:: Stopping and debugging a program that doesn't exit.
584 * Function Debugging:: Entering it when a certain function is called.
585 * Explicit Debug:: Entering it at a certain point in the program.
586 * Using Debugger:: What the debugger does; what you see while in it.
587 * Debugger Commands:: Commands used while in the debugger.
588 * Invoking the Debugger:: How to call the function @code{debug}.
589 * Internals of Debugger:: Subroutines of the debugger, and global variables.
590
591 Edebug
592
593 * Using Edebug:: Introduction to use of Edebug.
594 * Instrumenting:: You must instrument your code
595 in order to debug it with Edebug.
596 * Edebug Execution Modes:: Execution modes, stopping more or less often.
597 * Jumping:: Commands to jump to a specified place.
598 * Edebug Misc:: Miscellaneous commands.
599 * Breaks:: Setting breakpoints to make the program stop.
600 * Trapping Errors:: Trapping errors with Edebug.
601 * Edebug Views:: Views inside and outside of Edebug.
602 * Edebug Eval:: Evaluating expressions within Edebug.
603 * Eval List:: Expressions whose values are displayed
604 each time you enter Edebug.
605 * Printing in Edebug:: Customization of printing.
606 * Trace Buffer:: How to produce trace output in a buffer.
607 * Coverage Testing:: How to test evaluation coverage.
608 * The Outside Context:: Data that Edebug saves and restores.
609 * Edebug and Macros:: Specifying how to handle macro calls.
610 * Edebug Options:: Option variables for customizing Edebug.
611
612 Breaks
613
614 * Breakpoints:: Breakpoints at stop points.
615 * Global Break Condition:: Breaking on an event.
616 * Source Breakpoints:: Embedding breakpoints in source code.
617
618 The Outside Context
619
620 * Checking Whether to Stop::When Edebug decides what to do.
621 * Edebug Display Update:: When Edebug updates the display.
622 * Edebug Recursive Edit:: When Edebug stops execution.
623
624 Edebug and Macros
625
626 * Instrumenting Macro Calls::The basic problem.
627 * Specification List:: How to specify complex patterns of evaluation.
628 * Backtracking:: What Edebug does when matching fails.
629 * Specification Examples:: To help understand specifications.
630
631 Debugging Invalid Lisp Syntax
632
633 * Excess Open:: How to find a spurious open paren or missing close.
634 * Excess Close:: How to find a spurious close paren or missing open.
635
636 Reading and Printing Lisp Objects
637
638 * Streams Intro:: Overview of streams, reading and printing.
639 * Input Streams:: Various data types that can be used as
640 input streams.
641 * Input Functions:: Functions to read Lisp objects from text.
642 * Output Streams:: Various data types that can be used as
643 output streams.
644 * Output Functions:: Functions to print Lisp objects as text.
645 * Output Variables:: Variables that control what the printing
646 functions do.
647
648 Minibuffers
649
650 * Intro to Minibuffers:: Basic information about minibuffers.
651 * Text from Minibuffer:: How to read a straight text string.
652 * Object from Minibuffer:: How to read a Lisp object or expression.
653 * Minibuffer History:: Recording previous minibuffer inputs
654 so the user can reuse them.
655 * Initial Input:: Specifying initial contents for the minibuffer.
656 * Completion:: How to invoke and customize completion.
657 * Yes-or-No Queries:: Asking a question with a simple answer.
658 * Multiple Queries:: Asking a series of similar questions.
659 * Reading a Password:: Reading a password from the terminal.
660 * Minibuffer Commands:: Commands used as key bindings in minibuffers.
661 * Minibuffer Contents:: How such commands access the minibuffer text.
662 * Minibuffer Windows:: Operating on the special minibuffer windows.
663 * Recursive Mini:: Whether recursive entry to minibuffer is allowed.
664 * Minibuffer Misc:: Various customization hooks and variables.
665
666 Completion
667
668 * Basic Completion:: Low-level functions for completing strings.
669 (These are too low level to use the minibuffer.)
670 * Minibuffer Completion:: Invoking the minibuffer with completion.
671 * Completion Commands:: Minibuffer commands that do completion.
672 * High-Level Completion:: Convenient special cases of completion
673 (reading buffer name, file name, etc.).
674 * Reading File Names:: Using completion to read file names and
675 shell commands.
676 * Completion Variables:: Variables controlling completion behavior.
677 * Programmed Completion:: Writing your own completion function.
678 * Completion in Buffers:: Completing text in ordinary buffers.
679
680 Command Loop
681
682 * Command Overview:: How the command loop reads commands.
683 * Defining Commands:: Specifying how a function should read arguments.
684 * Interactive Call:: Calling a command, so that it will read arguments.
685 * Distinguish Interactive:: Making a command distinguish interactive calls.
686 * Command Loop Info:: Variables set by the command loop for you to examine.
687 * Adjusting Point:: Adjustment of point after a command.
688 * Input Events:: What input looks like when you read it.
689 * Reading Input:: How to read input events from the keyboard or mouse.
690 * Special Events:: Events processed immediately and individually.
691 * Waiting:: Waiting for user input or elapsed time.
692 * Quitting:: How @kbd{C-g} works. How to catch or defer quitting.
693 * Prefix Command Arguments:: How the commands to set prefix args work.
694 * Recursive Editing:: Entering a recursive edit,
695 and why you usually shouldn't.
696 * Disabling Commands:: How the command loop handles disabled commands.
697 * Command History:: How the command history is set up, and how accessed.
698 * Keyboard Macros:: How keyboard macros are implemented.
699
700 Defining Commands
701
702 * Using Interactive:: General rules for @code{interactive}.
703 * Interactive Codes:: The standard letter-codes for reading arguments
704 in various ways.
705 * Interactive Examples:: Examples of how to read interactive arguments.
706
707 Input Events
708
709 * Keyboard Events:: Ordinary characters--keys with symbols on them.
710 * Function Keys:: Function keys--keys with names, not symbols.
711 * Mouse Events:: Overview of mouse events.
712 * Click Events:: Pushing and releasing a mouse button.
713 * Drag Events:: Moving the mouse before releasing the button.
714 * Button-Down Events:: A button was pushed and not yet released.
715 * Repeat Events:: Double and triple click (or drag, or down).
716 * Motion Events:: Just moving the mouse, not pushing a button.
717 * Focus Events:: Moving the mouse between frames.
718 * Misc Events:: Other events the system can generate.
719 * Event Examples:: Examples of the lists for mouse events.
720 * Classifying Events:: Finding the modifier keys in an event symbol.
721 Event types.
722 * Accessing Mouse:: Functions to extract info from mouse events.
723 * Accessing Scroll:: Functions to get info from scroll bar events.
724 * Strings of Events:: Special considerations for putting
725 keyboard character events in a string.
726
727 Reading Input
728
729 * Key Sequence Input:: How to read one key sequence.
730 * Reading One Event:: How to read just one event.
731 * Event Mod:: How Emacs modifies events as they are read.
732 * Invoking the Input Method:: How reading an event uses the input method.
733 * Quoted Character Input:: Asking the user to specify a character.
734 * Event Input Misc:: How to reread or throw away input events.
735
736 Keymaps
737
738 * Key Sequences:: Key sequences as Lisp objects.
739 * Keymap Basics:: Basic concepts of keymaps.
740 * Format of Keymaps:: What a keymap looks like as a Lisp object.
741 * Creating Keymaps:: Functions to create and copy keymaps.
742 * Inheritance and Keymaps:: How one keymap can inherit the bindings
743 of another keymap.
744 * Prefix Keys:: Defining a key with a keymap as its definition.
745 * Active Keymaps:: How Emacs searches the active keymaps
746 for a key binding.
747 * Searching Keymaps:: A pseudo-Lisp summary of searching active maps.
748 * Controlling Active Maps:: Each buffer has a local keymap
749 to override the standard (global) bindings.
750 A minor mode can also override them.
751 * Key Lookup:: Finding a key's binding in one keymap.
752 * Functions for Key Lookup:: How to request key lookup.
753 * Changing Key Bindings:: Redefining a key in a keymap.
754 * Remapping Commands:: A keymap can translate one command to another.
755 * Translation Keymaps:: Keymaps for translating sequences of events.
756 * Key Binding Commands:: Interactive interfaces for redefining keys.
757 * Scanning Keymaps:: Looking through all keymaps, for printing help.
758 * Menu Keymaps:: Defining a menu as a keymap.
759
760 Menu Keymaps
761
762 * Defining Menus:: How to make a keymap that defines a menu.
763 * Mouse Menus:: How users actuate the menu with the mouse.
764 * Keyboard Menus:: How users actuate the menu with the keyboard.
765 * Menu Example:: Making a simple menu.
766 * Menu Bar:: How to customize the menu bar.
767 * Tool Bar:: A tool bar is a row of images.
768 * Modifying Menus:: How to add new items to a menu.
769
770 Defining Menus
771
772 * Simple Menu Items:: A simple kind of menu key binding,
773 limited in capabilities.
774 * Extended Menu Items:: More powerful menu item definitions
775 let you specify keywords to enable
776 various features.
777 * Menu Separators:: Drawing a horizontal line through a menu.
778 * Alias Menu Items:: Using command aliases in menu items.
779
780 Major and Minor Modes
781
782 * Hooks:: How to use hooks; how to write code that provides hooks.
783 * Major Modes:: Defining major modes.
784 * Minor Modes:: Defining minor modes.
785 * Mode Line Format:: Customizing the text that appears in the mode line.
786 * Imenu:: Providing a menu of definitions made in a buffer.
787 * Font Lock Mode:: How modes can highlight text according to syntax.
788 * Auto-Indentation:: How to teach Emacs to indent for a major mode.
789 * Desktop Save Mode:: How modes can have buffer state saved between
790 Emacs sessions.
791
792 Hooks
793
794 * Running Hooks:: How to run a hook.
795 * Setting Hooks:: How to put functions on a hook, or remove them.
796
797 Major Modes
798
799 * Major Mode Conventions:: Coding conventions for keymaps, etc.
800 * Auto Major Mode:: How Emacs chooses the major mode automatically.
801 * Mode Help:: Finding out how to use a mode.
802 * Derived Modes:: Defining a new major mode based on another major
803 mode.
804 * Basic Major Modes:: Modes that other modes are often derived from.
805 * Mode Hooks:: Hooks run at the end of major mode commands.
806 * Tabulated List Mode:: Parent mode for buffers containing tabulated data.
807 * Generic Modes:: Defining a simple major mode that supports
808 comment syntax and Font Lock mode.
809 * Example Major Modes:: Text mode and Lisp modes.
810
811 Minor Modes
812
813 * Minor Mode Conventions:: Tips for writing a minor mode.
814 * Keymaps and Minor Modes:: How a minor mode can have its own keymap.
815 * Defining Minor Modes:: A convenient facility for defining minor modes.
816
817 Mode Line Format
818
819 * Mode Line Basics:: Basic ideas of mode line control.
820 * Mode Line Data:: The data structure that controls the mode line.
821 * Mode Line Top:: The top level variable, mode-line-format.
822 * Mode Line Variables:: Variables used in that data structure.
823 * %-Constructs:: Putting information into a mode line.
824 * Properties in Mode:: Using text properties in the mode line.
825 * Header Lines:: Like a mode line, but at the top.
826 * Emulating Mode Line:: Formatting text as the mode line would.
827
828 Font Lock Mode
829
830 * Font Lock Basics:: Overview of customizing Font Lock.
831 * Search-based Fontification:: Fontification based on regexps.
832 * Customizing Keywords:: Customizing search-based fontification.
833 * Other Font Lock Variables:: Additional customization facilities.
834 * Levels of Font Lock:: Each mode can define alternative levels
835 so that the user can select more or less.
836 * Precalculated Fontification:: How Lisp programs that produce the buffer
837 contents can also specify how to fontify it.
838 * Faces for Font Lock:: Special faces specifically for Font Lock.
839 * Syntactic Font Lock:: Fontification based on syntax tables.
840 * Multiline Font Lock:: How to coerce Font Lock into properly
841 highlighting multiline constructs.
842
843 Multiline Font Lock Constructs
844
845 * Font Lock Multiline:: Marking multiline chunks with a text property.
846 * Region to Refontify:: Controlling which region gets refontified
847 after a buffer change.
848
849 Documentation
850
851 * Documentation Basics:: Where doc strings are defined and stored.
852 * Accessing Documentation:: How Lisp programs can access doc strings.
853 * Keys in Documentation:: Substituting current key bindings.
854 * Describing Characters:: Making printable descriptions of
855 non-printing characters and key sequences.
856 * Help Functions:: Subroutines used by Emacs help facilities.
857
858 Files
859
860 * Visiting Files:: Reading files into Emacs buffers for editing.
861 * Saving Buffers:: Writing changed buffers back into files.
862 * Reading from Files:: Reading files into buffers without visiting.
863 * Writing to Files:: Writing new files from parts of buffers.
864 * File Locks:: Locking and unlocking files, to prevent
865 simultaneous editing by two people.
866 * Information about Files:: Testing existence, accessibility, size of files.
867 * Changing Files:: Renaming files, changing permissions, etc.
868 * File Names:: Decomposing and expanding file names.
869 * Contents of Directories:: Getting a list of the files in a directory.
870 * Create/Delete Dirs:: Creating and Deleting Directories.
871 * Magic File Names:: Special handling for certain file names.
872 * Format Conversion:: Conversion to and from various file formats.
873
874 Visiting Files
875
876 * Visiting Functions:: The usual interface functions for visiting.
877 * Subroutines of Visiting:: Lower-level subroutines that they use.
878
879 Information about Files
880
881 * Testing Accessibility:: Is a given file readable? Writable?
882 * Kinds of Files:: Is it a directory? A symbolic link?
883 * Truenames:: Eliminating symbolic links from a file name.
884 * File Attributes:: How large is it? Any other names? Etc.
885 * Locating Files:: How to find a file in standard places.
886
887 File Names
888
889 * File Name Components:: The directory part of a file name, and the rest.
890 * Relative File Names:: Some file names are relative to a current directory.
891 * Directory Names:: A directory's name as a directory
892 is different from its name as a file.
893 * File Name Expansion:: Converting relative file names to absolute ones.
894 * Unique File Names:: Generating names for temporary files.
895 * File Name Completion:: Finding the completions for a given file name.
896 * Standard File Names:: If your package uses a fixed file name,
897 how to handle various operating systems simply.
898
899 File Format Conversion
900
901 * Format Conversion Overview:: @code{insert-file-contents} and @code{write-region}.
902 * Format Conversion Round-Trip:: Using @code{format-alist}.
903 * Format Conversion Piecemeal:: Specifying non-paired conversion.
904
905 Backups and Auto-Saving
906
907 * Backup Files:: How backup files are made; how their names
908 are chosen.
909 * Auto-Saving:: How auto-save files are made; how their
910 names are chosen.
911 * Reverting:: @code{revert-buffer}, and how to customize
912 what it does.
913
914 Backup Files
915
916 * Making Backups:: How Emacs makes backup files, and when.
917 * Rename or Copy:: Two alternatives: renaming the old file
918 or copying it.
919 * Numbered Backups:: Keeping multiple backups for each source file.
920 * Backup Names:: How backup file names are computed; customization.
921
922 Buffers
923
924 * Buffer Basics:: What is a buffer?
925 * Current Buffer:: Designating a buffer as current
926 so that primitives will access its contents.
927 * Buffer Names:: Accessing and changing buffer names.
928 * Buffer File Name:: The buffer file name indicates which file
929 is visited.
930 * Buffer Modification:: A buffer is @dfn{modified} if it needs to be saved.
931 * Modification Time:: Determining whether the visited file was changed
932 "behind Emacs's back".
933 * Read Only Buffers:: Modifying text is not allowed in a
934 read-only buffer.
935 * The Buffer List:: How to look at all the existing buffers.
936 * Creating Buffers:: Functions that create buffers.
937 * Killing Buffers:: Buffers exist until explicitly killed.
938 * Indirect Buffers:: An indirect buffer shares text with some
939 other buffer.
940 * Swapping Text:: Swapping text between two buffers.
941 * Buffer Gap:: The gap in the buffer.
942
943 Windows
944
945 * Basic Windows:: Basic information on using windows.
946 * Splitting Windows:: Splitting one window into two windows.
947 * Deleting Windows:: Deleting a window gives its space to other windows.
948 * Selecting Windows:: The selected window is the one that you edit in.
949 * Cyclic Window Ordering:: Moving around the existing windows.
950 * Buffers and Windows:: Each window displays the contents of a buffer.
951 * Switching Buffers:: Higher-level functions for switching to a buffer.
952 * Choosing Window:: How to choose a window for displaying a buffer.
953 * Display Action Functions:: Subroutines for @code{display-buffer}.
954 * Choosing Window Options:: Extra options affecting how buffers are displayed.
955 * Window History:: Each window remembers the buffers displayed in it.
956 * Dedicated Windows:: How to avoid displaying another buffer in
957 a specific window.
958 * Window Point:: Each window has its own location of point.
959 * Window Start and End:: Buffer positions indicating which text is
960 on-screen in a window.
961 * Textual Scrolling:: Moving text up and down through the window.
962 * Vertical Scrolling:: Moving the contents up and down on the window.
963 * Horizontal Scrolling:: Moving the contents sideways on the window.
964 * Size of Window:: Accessing the size of a window.
965 * Resizing Windows:: Changing the size of a window.
966 * Coordinates and Windows:: Converting coordinates to windows.
967 * Window Tree:: The layout and sizes of all windows in a frame.
968 * Window Configurations:: Saving and restoring the state of the screen.
969 * Window Parameters:: Associating additional information with windows.
970 * Window Hooks:: Hooks for scrolling, window size changes,
971 redisplay going past a certain point,
972 or window configuration changes.
973
974 Frames
975
976 * Creating Frames:: Creating additional frames.
977 * Multiple Terminals:: Displaying on several different devices.
978 * Frame Parameters:: Controlling frame size, position, font, etc.
979 * Terminal Parameters:: Parameters common for all frames on terminal.
980 * Frame Titles:: Automatic updating of frame titles.
981 * Deleting Frames:: Frames last until explicitly deleted.
982 * Finding All Frames:: How to examine all existing frames.
983 * Frames and Windows:: A frame contains windows;
984 display of text always works through windows.
985 * Minibuffers and Frames:: How a frame finds the minibuffer to use.
986 * Input Focus:: Specifying the selected frame.
987 * Visibility of Frames:: Frames may be visible or invisible, or icons.
988 * Raising and Lowering:: Raising a frame makes it hide other windows;
989 lowering it makes the others hide it.
990 * Frame Configurations:: Saving the state of all frames.
991 * Mouse Tracking:: Getting events that say when the mouse moves.
992 * Mouse Position:: Asking where the mouse is, or moving it.
993 * Pop-Up Menus:: Displaying a menu for the user to select from.
994 * Dialog Boxes:: Displaying a box to ask yes or no.
995 * Pointer Shape:: Specifying the shape of the mouse pointer.
996 * Window System Selections::Transferring text to and from other X clients.
997 * Drag and Drop:: Internals of Drag-and-Drop implementation.
998 * Color Names:: Getting the definitions of color names.
999 * Text Terminal Colors:: Defining colors for text terminals.
1000 * Resources:: Getting resource values from the server.
1001 * Display Feature Testing:: Determining the features of a terminal.
1002
1003 Frame Parameters
1004
1005 * Parameter Access:: How to change a frame's parameters.
1006 * Initial Parameters:: Specifying frame parameters when you make a frame.
1007 * Window Frame Parameters:: List of frame parameters for window systems.
1008 * Size and Position:: Changing the size and position of a frame.
1009 * Geometry:: Parsing geometry specifications.
1010
1011 Window Frame Parameters
1012
1013 * Basic Parameters:: Parameters that are fundamental.
1014 * Position Parameters:: The position of the frame on the screen.
1015 * Size Parameters:: Frame's size.
1016 * Layout Parameters:: Size of parts of the frame, and
1017 enabling or disabling some parts.
1018 * Buffer Parameters:: Which buffers have been or should be shown.
1019 * Management Parameters:: Communicating with the window manager.
1020 * Cursor Parameters:: Controlling the cursor appearance.
1021 * Font and Color Parameters:: Fonts and colors for the frame text.
1022
1023 Positions
1024
1025 * Point:: The special position where editing takes place.
1026 * Motion:: Changing point.
1027 * Excursions:: Temporary motion and buffer changes.
1028 * Narrowing:: Restricting editing to a portion of the buffer.
1029
1030 Motion
1031
1032 * Character Motion:: Moving in terms of characters.
1033 * Word Motion:: Moving in terms of words.
1034 * Buffer End Motion:: Moving to the beginning or end of the buffer.
1035 * Text Lines:: Moving in terms of lines of text.
1036 * Screen Lines:: Moving in terms of lines as displayed.
1037 * List Motion:: Moving by parsing lists and sexps.
1038 * Skipping Characters:: Skipping characters belonging to a certain set.
1039
1040 Markers
1041
1042 * Overview of Markers:: The components of a marker, and how it relocates.
1043 * Predicates on Markers:: Testing whether an object is a marker.
1044 * Creating Markers:: Making empty markers or markers at certain places.
1045 * Information from Markers::Finding the marker's buffer or character position.
1046 * Marker Insertion Types:: Two ways a marker can relocate when you
1047 insert where it points.
1048 * Moving Markers:: Moving the marker to a new buffer or position.
1049 * The Mark:: How "the mark" is implemented with a marker.
1050 * The Region:: How to access "the region".
1051
1052 Text
1053
1054 * Near Point:: Examining text in the vicinity of point.
1055 * Buffer Contents:: Examining text in a general fashion.
1056 * Comparing Text:: Comparing substrings of buffers.
1057 * Insertion:: Adding new text to a buffer.
1058 * Commands for Insertion:: User-level commands to insert text.
1059 * Deletion:: Removing text from a buffer.
1060 * User-Level Deletion:: User-level commands to delete text.
1061 * The Kill Ring:: Where removed text sometimes is saved for
1062 later use.
1063 * Undo:: Undoing changes to the text of a buffer.
1064 * Maintaining Undo:: How to enable and disable undo information.
1065 How to control how much information is kept.
1066 * Filling:: Functions for explicit filling.
1067 * Margins:: How to specify margins for filling commands.
1068 * Adaptive Fill:: Adaptive Fill mode chooses a fill prefix
1069 from context.
1070 * Auto Filling:: How auto-fill mode is implemented to break lines.
1071 * Sorting:: Functions for sorting parts of the buffer.
1072 * Columns:: Computing horizontal positions, and using them.
1073 * Indentation:: Functions to insert or adjust indentation.
1074 * Case Changes:: Case conversion of parts of the buffer.
1075 * Text Properties:: Assigning Lisp property lists to text characters.
1076 * Substitution:: Replacing a given character wherever it appears.
1077 * Transposition:: Swapping two portions of a buffer.
1078 * Registers:: How registers are implemented. Accessing
1079 the text or position stored in a register.
1080 * Base 64:: Conversion to or from base 64 encoding.
1081 * Checksum/Hash:: Computing cryptographic hashes.
1082 * Parsing HTML/XML:: Parsing HTML and XML.
1083 * Atomic Changes:: Installing several buffer changes "atomically".
1084 * Change Hooks:: Supplying functions to be run when text is changed.
1085
1086 The Kill Ring
1087
1088 * Kill Ring Concepts:: What text looks like in the kill ring.
1089 * Kill Functions:: Functions that kill text.
1090 * Yanking:: How yanking is done.
1091 * Yank Commands:: Commands that access the kill ring.
1092 * Low-Level Kill Ring:: Functions and variables for kill ring access.
1093 * Internals of Kill Ring:: Variables that hold kill ring data.
1094
1095 Indentation
1096
1097 * Primitive Indent:: Functions used to count and insert indentation.
1098 * Mode-Specific Indent:: Customize indentation for different modes.
1099 * Region Indent:: Indent all the lines in a region.
1100 * Relative Indent:: Indent the current line based on previous lines.
1101 * Indent Tabs:: Adjustable, typewriter-like tab stops.
1102 * Motion by Indent:: Move to first non-blank character.
1103
1104 Text Properties
1105
1106 * Examining Properties:: Looking at the properties of one character.
1107 * Changing Properties:: Setting the properties of a range of text.
1108 * Property Search:: Searching for where a property changes value.
1109 * Special Properties:: Particular properties with special meanings.
1110 * Format Properties:: Properties for representing formatting of text.
1111 * Sticky Properties:: How inserted text gets properties from
1112 neighboring text.
1113 * Lazy Properties:: Computing text properties in a lazy fashion
1114 only when text is examined.
1115 * Clickable Text:: Using text properties to make regions of text
1116 do something when you click on them.
1117 * Fields:: The @code{field} property defines
1118 fields within the buffer.
1119 * Not Intervals:: Why text properties do not use
1120 Lisp-visible text intervals.
1121
1122 Non-@acronym{ASCII} Characters
1123
1124 * Text Representations:: How Emacs represents text.
1125 * Converting Representations:: Converting unibyte to multibyte and vice versa.
1126 * Selecting a Representation:: Treating a byte sequence as unibyte or multi.
1127 * Character Codes:: How unibyte and multibyte relate to
1128 codes of individual characters.
1129 * Character Properties:: Character attributes that define their
1130 behavior and handling.
1131 * Character Sets:: The space of possible character codes
1132 is divided into various character sets.
1133 * Scanning Charsets:: Which character sets are used in a buffer?
1134 * Translation of Characters:: Translation tables are used for conversion.
1135 * Coding Systems:: Coding systems are conversions for saving files.
1136 * Input Methods:: Input methods allow users to enter various
1137 non-ASCII characters without special keyboards.
1138 * Locales:: Interacting with the POSIX locale.
1139
1140 Coding Systems
1141
1142 * Coding System Basics:: Basic concepts.
1143 * Encoding and I/O:: How file I/O functions handle coding systems.
1144 * Lisp and Coding Systems:: Functions to operate on coding system names.
1145 * User-Chosen Coding Systems:: Asking the user to choose a coding system.
1146 * Default Coding Systems:: Controlling the default choices.
1147 * Specifying Coding Systems:: Requesting a particular coding system
1148 for a single file operation.
1149 * Explicit Encoding:: Encoding or decoding text without doing I/O.
1150 * Terminal I/O Encoding:: Use of encoding for terminal I/O.
1151 * MS-DOS File Types:: How DOS "text" and "binary" files
1152 relate to coding systems.
1153
1154 Searching and Matching
1155
1156 * String Search:: Search for an exact match.
1157 * Searching and Case:: Case-independent or case-significant searching.
1158 * Regular Expressions:: Describing classes of strings.
1159 * Regexp Search:: Searching for a match for a regexp.
1160 * POSIX Regexps:: Searching POSIX-style for the longest match.
1161 * Match Data:: Finding out which part of the text matched,
1162 after a string or regexp search.
1163 * Search and Replace:: Commands that loop, searching and replacing.
1164 * Standard Regexps:: Useful regexps for finding sentences, pages,...
1165
1166 Regular Expressions
1167
1168 * Syntax of Regexps:: Rules for writing regular expressions.
1169 * Regexp Example:: Illustrates regular expression syntax.
1170 * Regexp Functions:: Functions for operating on regular expressions.
1171
1172 Syntax of Regular Expressions
1173
1174 * Regexp Special:: Special characters in regular expressions.
1175 * Char Classes:: Character classes used in regular expressions.
1176 * Regexp Backslash:: Backslash-sequences in regular expressions.
1177
1178 The Match Data
1179
1180 * Replacing Match:: Replacing a substring that was matched.
1181 * Simple Match Data:: Accessing single items of match data,
1182 such as where a particular subexpression started.
1183 * Entire Match Data:: Accessing the entire match data at once, as a list.
1184 * Saving Match Data:: Saving and restoring the match data.
1185
1186 Syntax Tables
1187
1188 * Syntax Basics:: Basic concepts of syntax tables.
1189 * Syntax Descriptors:: How characters are classified.
1190 * Syntax Table Functions:: How to create, examine and alter syntax tables.
1191 * Syntax Properties:: Overriding syntax with text properties.
1192 * Motion and Syntax:: Moving over characters with certain syntaxes.
1193 * Parsing Expressions:: Parsing balanced expressions
1194 using the syntax table.
1195 * Standard Syntax Tables:: Syntax tables used by various major modes.
1196 * Syntax Table Internals:: How syntax table information is stored.
1197 * Categories:: Another way of classifying character syntax.
1198
1199 Syntax Descriptors
1200
1201 * Syntax Class Table:: Table of syntax classes.
1202 * Syntax Flags:: Additional flags each character can have.
1203
1204 Parsing Expressions
1205
1206 * Motion via Parsing:: Motion functions that work by parsing.
1207 * Position Parse:: Determining the syntactic state of a position.
1208 * Parser State:: How Emacs represents a syntactic state.
1209 * Low-Level Parsing:: Parsing across a specified region.
1210 * Control Parsing:: Parameters that affect parsing.
1211
1212 Abbrevs and Abbrev Expansion
1213
1214 * Abbrev Tables:: Creating and working with abbrev tables.
1215 * Defining Abbrevs:: Specifying abbreviations and their expansions.
1216 * Abbrev Files:: Saving abbrevs in files.
1217 * Abbrev Expansion:: Controlling expansion; expansion subroutines.
1218 * Standard Abbrev Tables:: Abbrev tables used by various major modes.
1219 * Abbrev Properties:: How to read and set abbrev properties.
1220 Which properties have which effect.
1221 * Abbrev Table Properties:: How to read and set abbrev table properties.
1222 Which properties have which effect.
1223
1224 Processes
1225
1226 * Subprocess Creation:: Functions that start subprocesses.
1227 * Shell Arguments:: Quoting an argument to pass it to a shell.
1228 * Synchronous Processes:: Details of using synchronous subprocesses.
1229 * Asynchronous Processes:: Starting up an asynchronous subprocess.
1230 * Deleting Processes:: Eliminating an asynchronous subprocess.
1231 * Process Information:: Accessing run-status and other attributes.
1232 * Input to Processes:: Sending input to an asynchronous subprocess.
1233 * Signals to Processes:: Stopping, continuing or interrupting
1234 an asynchronous subprocess.
1235 * Output from Processes:: Collecting output from an asynchronous subprocess.
1236 * Sentinels:: Sentinels run when process run-status changes.
1237 * Query Before Exit:: Whether to query if exiting will kill a process.
1238 * System Processes:: Accessing other processes running on your system.
1239 * Transaction Queues:: Transaction-based communication with subprocesses.
1240 * Network:: Opening network connections.
1241 * Network Servers:: Network servers let Emacs accept net connections.
1242 * Datagrams:: UDP network connections.
1243 * Low-Level Network:: Lower-level but more general function
1244 to create connections and servers.
1245 * Misc Network:: Additional relevant functions for
1246 network connections.
1247 * Serial Ports:: Communicating with serial ports.
1248 * Byte Packing:: Using bindat to pack and unpack binary data.
1249
1250 Receiving Output from Processes
1251
1252 * Process Buffers:: If no filter, output is put in a buffer.
1253 * Filter Functions:: Filter functions accept output from the process.
1254 * Decoding Output:: Filters can get unibyte or multibyte strings.
1255 * Accepting Output:: How to wait until process output arrives.
1256
1257 Low-Level Network Access
1258
1259 * Network Processes:: Using @code{make-network-process}.
1260 * Network Options:: Further control over network connections.
1261 * Network Feature Testing:: Determining which network features work on
1262 the machine you are using.
1263
1264 Packing and Unpacking Byte Arrays
1265
1266 * Bindat Spec:: Describing data layout.
1267 * Bindat Functions:: Doing the unpacking and packing.
1268 * Bindat Examples:: Samples of what bindat.el can do for you!
1269
1270 Emacs Display
1271
1272 * Refresh Screen:: Clearing the screen and redrawing everything on it.
1273 * Forcing Redisplay:: Forcing redisplay.
1274 * Truncation:: Folding or wrapping long text lines.
1275 * The Echo Area:: Displaying messages at the bottom of the screen.
1276 * Warnings:: Displaying warning messages for the user.
1277 * Invisible Text:: Hiding part of the buffer text.
1278 * Selective Display:: Hiding part of the buffer text (the old way).
1279 * Temporary Displays:: Displays that go away automatically.
1280 * Overlays:: Use overlays to highlight parts of the buffer.
1281 * Width:: How wide a character or string is on the screen.
1282 * Line Height:: Controlling the height of lines.
1283 * Faces:: A face defines a graphics style
1284 for text characters: font, colors, etc.
1285 * Fringes:: Controlling window fringes.
1286 * Scroll Bars:: Controlling vertical scroll bars.
1287 * Display Property:: Enabling special display features.
1288 * Images:: Displaying images in Emacs buffers.
1289 * Buttons:: Adding clickable buttons to Emacs buffers.
1290 * Abstract Display:: Emacs's Widget for Object Collections.
1291 * Blinking:: How Emacs shows the matching open parenthesis.
1292 * Character Display:: How Emacs displays individual characters.
1293 * Beeping:: Audible signal to the user.
1294 * Window Systems:: Which window system is being used.
1295 * Bidirectional Display:: Display of bidirectional scripts, such as
1296 Arabic and Farsi.
1297
1298 The Echo Area
1299
1300 * Displaying Messages:: Explicitly displaying text in the echo area.
1301 * Progress:: Informing user about progress of a long operation.
1302 * Logging Messages:: Echo area messages are logged for the user.
1303 * Echo Area Customization:: Controlling the echo area.
1304
1305 Reporting Warnings
1306
1307 * Warning Basics:: Warnings concepts and functions to report them.
1308 * Warning Variables:: Variables programs bind to customize
1309 their warnings.
1310 * Warning Options:: Variables users set to control display of warnings.
1311 * Delayed Warnings:: Deferring warning display until the end of a command.
1312
1313 Overlays
1314
1315 * Managing Overlays:: Creating and moving overlays.
1316 * Overlay Properties:: How to read and set properties.
1317 What properties do to the screen display.
1318 * Finding Overlays:: Searching for overlays.
1319
1320 Faces
1321
1322 * Defining Faces:: How to define a face.
1323 * Face Attributes:: What is in a face?
1324 * Attribute Functions:: Functions to examine and set face attributes.
1325 * Displaying Faces:: How Emacs combines the faces specified for
1326 a character.
1327 * Face Remapping:: Remapping faces to alternative definitions.
1328 * Face Functions:: How to define and examine faces.
1329 * Auto Faces:: Hook for automatic face assignment.
1330 * Basic Faces:: Faces that are defined by default.
1331 * Font Selection:: Finding the best available font for a face.
1332 * Font Lookup:: Looking up the names of available fonts
1333 and information about them.
1334 * Fontsets:: A fontset is a collection of fonts
1335 that handle a range of character sets.
1336 * Low-Level Font:: Lisp representation for character display fonts.
1337
1338 Fringes
1339
1340 * Fringe Size/Pos:: Specifying where to put the window fringes.
1341 * Fringe Indicators:: Displaying indicator icons in the window fringes.
1342 * Fringe Cursors:: Displaying cursors in the right fringe.
1343 * Fringe Bitmaps:: Specifying bitmaps for fringe indicators.
1344 * Customizing Bitmaps:: Specifying your own bitmaps to use in the fringes.
1345 * Overlay Arrow:: Display of an arrow to indicate position.
1346
1347 The @code{display} Property
1348
1349 * Replacing Specs:: Display specs that replace the text.
1350 * Specified Space:: Displaying one space with a specified width.
1351 * Pixel Specification:: Specifying space width or height in pixels.
1352 * Other Display Specs:: Displaying an image; adjusting the height,
1353 spacing, and other properties of text.
1354 * Display Margins:: Displaying text or images to the side of
1355 the main text.
1356
1357 Images
1358
1359 * Image Formats:: Supported image formats.
1360 * Image Descriptors:: How to specify an image for use in @code{:display}.
1361 * XBM Images:: Special features for XBM format.
1362 * XPM Images:: Special features for XPM format.
1363 * GIF Images:: Special features for GIF format.
1364 * TIFF Images:: Special features for TIFF format.
1365 * PostScript Images:: Special features for PostScript format.
1366 * Other Image Types:: Various other formats are supported.
1367 * Defining Images:: Convenient ways to define an image for later use.
1368 * Showing Images:: Convenient ways to display an image once
1369 it is defined.
1370 * Animated Images:: Some image formats can be animated.
1371 * Image Cache:: Internal mechanisms of image display.
1372
1373 Buttons
1374
1375 * Button Properties:: Button properties with special meanings.
1376 * Button Types:: Defining common properties for classes of buttons.
1377 * Making Buttons:: Adding buttons to Emacs buffers.
1378 * Manipulating Buttons:: Getting and setting properties of buttons.
1379 * Button Buffer Commands:: Buffer-wide commands and bindings for buttons.
1380
1381 Abstract Display
1382
1383 * Abstract Display Functions:: Functions in the Ewoc package.
1384 * Abstract Display Example:: Example of using Ewoc.
1385
1386 Character Display
1387
1388 * Usual Display:: The usual conventions for displaying characters.
1389 * Display Tables:: What a display table consists of.
1390 * Active Display Table:: How Emacs selects a display table to use.
1391 * Glyphs:: How to define a glyph, and what glyphs mean.
1392 * Glyphless Chars:: How glyphless characters are drawn.
1393
1394 Operating System Interface
1395
1396 * Starting Up:: Customizing Emacs startup processing.
1397 * Getting Out:: How exiting works (permanent or temporary).
1398 * System Environment:: Distinguish the name and kind of system.
1399 * User Identification:: Finding the name and user id of the user.
1400 * Time of Day:: Getting the current time.
1401 * Time Conversion:: Converting a time from numeric form to
1402 calendrical data and vice versa.
1403 * Time Parsing:: Converting a time from numeric form to text
1404 and vice versa.
1405 * Processor Run Time:: Getting the run time used by Emacs.
1406 * Time Calculations:: Adding, subtracting, comparing times, etc.
1407 * Timers:: Setting a timer to call a function at a
1408 certain time.
1409 * Idle Timers:: Setting a timer to call a function when Emacs has
1410 been idle for a certain length of time.
1411 * Terminal Input:: Accessing and recording terminal input.
1412 * Terminal Output:: Controlling and recording terminal output.
1413 * Sound Output:: Playing sounds on the computer's speaker.
1414 * X11 Keysyms:: Operating on key symbols for X Windows.
1415 * Batch Mode:: Running Emacs without terminal interaction.
1416 * Session Management:: Saving and restoring state with
1417 X Session Management.
1418 * Notifications:: Desktop notifications.
1419 * Dynamic Libraries:: On-demand loading of support libraries.
1420
1421 Preparing Lisp code for distribution
1422
1423 * Packaging Basics:: The basic concepts of Emacs Lisp packages.
1424 * Simple Packages:: How to package a single .el file.
1425 * Multi-file Packages:: How to package multiple files.
1426
1427 Starting Up Emacs
1428
1429 * Startup Summary:: Sequence of actions Emacs performs at startup.
1430 * Init File:: Details on reading the init file.
1431 * Terminal-Specific:: How the terminal-specific Lisp file is read.
1432 * Command-Line Arguments:: How command-line arguments are processed,
1433 and how you can customize them.
1434
1435 Getting Out of Emacs
1436
1437 * Killing Emacs:: Exiting Emacs irreversibly.
1438 * Suspending Emacs:: Exiting Emacs reversibly.
1439
1440 Terminal Input
1441
1442 * Input Modes:: Options for how input is processed.
1443 * Recording Input:: Saving histories of recent or all input events.
1444
1445 Tips and Conventions
1446
1447 * Coding Conventions:: Conventions for clean and robust programs.
1448 * Key Binding Conventions:: Which keys should be bound by which programs.
1449 * Programming Tips:: Making Emacs code fit smoothly in Emacs.
1450 * Compilation Tips:: Making compiled code run fast.
1451 * Warning Tips:: Turning off compiler warnings.
1452 * Documentation Tips:: Writing readable documentation strings.
1453 * Comment Tips:: Conventions for writing comments.
1454 * Library Headers:: Standard headers for library packages.
1455
1456 GNU Emacs Internals
1457
1458 * Building Emacs:: How the dumped Emacs is made.
1459 * Pure Storage:: Kludge to make preloaded Lisp functions shareable.
1460 * Garbage Collection:: Reclaiming space for Lisp objects no longer used.
1461 * Memory Usage:: Info about total size of Lisp objects made so far.
1462 * Writing Emacs Primitives:: Writing C code for Emacs.
1463 * Object Internals:: Data formats of buffers, windows, processes.
1464
1465 Object Internals
1466
1467 * Buffer Internals:: Components of a buffer structure.
1468 * Window Internals:: Components of a window structure.
1469 * Process Internals:: Components of a process structure.
1470 @end detailmenu
1471 @end menu
1472
1473 @include intro.texi
1474 @include objects.texi
1475 @include numbers.texi
1476 @include strings.texi
1477
1478 @include lists.texi
1479 @include sequences.texi
1480 @include hash.texi
1481 @include symbols.texi
1482 @include eval.texi
1483
1484 @include control.texi
1485 @include variables.texi
1486 @include functions.texi
1487 @include macros.texi
1488
1489 @include customize.texi
1490 @include loading.texi
1491 @include compile.texi
1492 @include advice.texi
1493
1494 @c This includes edebug.texi.
1495 @include debugging.texi
1496 @include streams.texi
1497 @include minibuf.texi
1498 @include commands.texi
1499
1500 @include keymaps.texi
1501 @include modes.texi
1502 @include help.texi
1503 @include files.texi
1504
1505 @include backups.texi
1506
1507 @c ================ Beginning of Volume 2 ================
1508 @c include buffers.texi
1509 @c include windows.texi
1510 @c include frames.texi
1511
1512 @c include positions.texi
1513 @c include markers.texi
1514 @c include text.texi
1515 @c include nonascii.texi
1516
1517 @c include searching.texi
1518 @c include syntax.texi
1519 @c include abbrevs.texi
1520 @c include processes.texi
1521
1522 @c include display.texi
1523 @c include os.texi
1524
1525 @c MOVE to Emacs Manual: include misc-modes.texi
1526
1527 @c appendices
1528
1529 @c REMOVE this: include non-hacker.texi
1530
1531 @c include anti.texi
1532 @c include doclicense.texi
1533 @c include gpl.texi
1534 @c include tips.texi
1535 @c include internals.texi
1536 @c include errors.texi
1537 @c include maps.texi
1538 @c include hooks.texi
1539
1540 @include index.texi
1541
1542 @ignore
1543 @node New Symbols, , Index, Top
1544 @unnumbered New Symbols Since the Previous Edition
1545
1546 @printindex tp
1547 @end ignore
1548
1549 @bye
1550
1551 \f
1552 These words prevent "local variables" above from confusing Emacs.