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Diffstat (limited to 'Etc/FAQ.yo')
| -rw-r--r-- | Etc/FAQ.yo | 91 |
1 files changed, 44 insertions, 47 deletions
diff --git a/Etc/FAQ.yo b/Etc/FAQ.yo index 973393191..703bf02de 100644 --- a/Etc/FAQ.yo +++ b/Etc/FAQ.yo @@ -126,11 +126,11 @@ Chapter 4: The mysteries of completion 4.5. How do I get started with programmable completion? 4.6. Suppose I want to complete all files during a special completion? -Chapter 5: Multibyte input +Chapter 5: Multibyte input and output 5.1. What is multibyte input? -5.2. How does zsh handle multibyte input? -5.3. How do I ensure multibyte input works on my system? +5.2. How does zsh handle multibyte input and output? +5.3. How do I ensure multibyte input and output work on my system? 5.4. How can I input characters that aren't on my keyboard? Chapter 6: The future of zsh @@ -1961,7 +1961,7 @@ sect(Suppose I want to complete all files during a special completion?) such as expansion or approximate completion. -chapter(Multibyte input) +chapter(Multibyte input and output) label(c5) sect(What is multibyte input?) @@ -2012,7 +2012,7 @@ sect(What is multibyte input?) in those formats.) -sect(How does zsh handle multibyte input?) +sect(How does zsh handle multibyte input and output?) Until version 4.3, zsh didn't handle multibyte input properly at all. Each octet in a multibyte character would look to the shell like a @@ -2021,50 +2021,44 @@ sect(How does zsh handle multibyte input?) cause all sorts of odd effects. (It was possible to edit in zsh using single-byte extensions of ASCII such as the ISO 8859 family, however.) - From version 4.3, multibyte input is handled in the line editor if zsh - has been compiled with the appropriate definitions. This will happen - automatically if the compiler defines __STDC_ISO_10646__, which is true - for many recent GNU-based systems. On other systems you must configure - zsh with the argument --enable-multibyte to configure. Explicit use of - --enable-multibyte should work on many other recent UNIX systems; if it - works on yours, and that's not mentioned in the shell documentation, - please report this to zsh-workers@sunsite.dk, and if it doesn't but you - can work out why not we'd also be interested in hearing. - - (The reason for the test for __STDC_ISO_10646__ is that its presence - happens to indicate that the required library support is likely to be - present, short-circuiting a large number of configuration tests. This - isn't strictly guaranteed, since the definition indicates the rather more - limited fact that the wide character representation used internally by - the shell is Unicode. However, in practice such systems provide the - right level of support for zsh to use. It would be better to test - individually for the library features the shell needs; unfortunately - there are a lot of them.) - - You can test if multibyte handling is compiled into your version of the - shell by running: - verb( - (bindkey -m) - ) - which should output a warning: - verb( - bindkey: warning: `bindkey -m' disables multibyte support - ) - If it doesn't, you don't have multibyte support in your shell. The - parentheses are there to run the command in a subshell, which protects - your interactive shell from the effects being warned about. - - Multibyte strings are not yet handled anywhere else in the shell. This - means, for example, patterns treat multibyte characters as a set of single - octets and the ${#var} syntax counts octets, not characters. There will - probably be new syntax to ensure that zsh can work both in its traditional - way as well as when interpreting multibyte characters. - - -sect(How do I ensure multibyte input works on my system?) + From version 4.3.4, multibyte input is handled in the line editor if zsh + has been compiled with the appropriate definitions, and is automatically + activated. This is indicated by the option tt(MULTIBYTE), which is + set by default on shells that support multibyte mode. Hence you + can test this with a standard option test: `tt([[ -o multibyte ]])'. + + The tt(MULTIBYTE) option affects the entire shell: parameter expansion, + pattern matching, etc. count valid multibyte character strings as a + single character. You can unset the option locally in a function to + revert to single-byte operation. + + Note that if the shell is emulating a Bourne shell the tt(MULTIBYTE) + option is unset by default. This allows various POSIX modes to + work normally (POSIX does not deal with multibyte characters). If + you use a "sh" or "ksh" emulation interactively you shouldprobably + set the tt(MULTIBYTE) option. + + The other option that affects multibyte support is tt(COMBINING_CHARS), + new in version 4.3.7. When this is set, any zero-length punctuation + characters that follow an alphanumeric character (the base character) are + assumed to be modifications (accents etc.) to the base character and to + be displayed within the same screen area as the base character. As not + all terminals handle this, even if they correctly display the base + multibyte character, this option is not on by default. The KDE terminal + emulator tt(konsole) is known to handle combining characters. + + The tt(COMBINING_CHARS) option only affects output; combining characters + may always be input, but when the option is off will be displayed + specially. By default this is as a code point (the index of the + character in the character set) between angle brackets, usually + in inverse video. Highlighting of such special characters can + be modified using the new array parameter tt(zle_highlight). + + +sect(How do I ensure multibyte input and output work on my system?) Once you have a version of zsh with multibyte support, you need to - ensure the envivronment is correct. We'll assume you're using UTF-8. + ensure the environment is correct. We'll assume you're using UTF-8. Many modern systems may come set up correctly already. Try one of the editing widgets described in the next section to see. @@ -2163,6 +2157,9 @@ url(http://www.unicode.org/charts/)(http://www.unicode.org/charts/). however, using UTF-8 massively extends the number of valid characters that can be produced. + See also url(http://www.cl.cam.ac.uk/~mgk25/unicode.html#input)http://www.cl.cam.ac.uk/~mgk25/unicode.html#input) + for general information on entering Unicode characters from a keyboard. + chapter(The future of zsh) |