# Configuration of Chawan Chawan supports configuration of various options like keybindings, user stylesheets, site preferences, etc. The configuration format is very similar to toml, with the following exceptions: * Inline tables may span across multiple lines. * Table arrays can be cleared by setting a variable by the same to the empty array. This allows users to disable default table array rules. Example: ``` omnirule = [] # note: this must be placed at the beginning of the file. [[omnirule]] # this is legal. all default omni-rules are now disabled. ``` Chawan will look for a config file in the $XDG_CONFIG_HOME/chawan/ directory called `config.toml`. (Chawan defaults to ~/.config if the XDG_CONFIG_HOME environment variable is not set.) See the default configuration file in the res/ folder, and bonus configuration files in the bonus/ folder for further examples. **Table of contents** * [Start](#start) * [Search](#search) * [Buffer](#buffer) * [Encoding](#encoding) * [External](#external) * [Network](#network) * [Display](#display) * [Protocol](#protocol) * [Omnirule](#omnirule) * [Siteconf](#siteconf) * [Stylesheets](#stylesheets) * [Keybindings](#keybindings) * [Pager actions](#pager-actions) * [Line-editing actions](#line-editing-actions) * [Appendix](#appendix) * [Regex handling](#regex-handling) * [Match mode](#match-mode) * [Search mode](#search-mode) * [Path handling](#path-handling) * [Word types](#word-types) * [w3m word](#w3m-word) * [vi word](#vi-word) * [Big word](#big-word) ## Start Start-up options are to be placed in the `[start]` section. Following is a list of start-up options:
Name Value Function
visual-home url Page opened when Chawan is called with the -V option (and no other pages are passed as arguments.)
startup-script JavaScript code Script Chawan runs on start-up. Pages will not be loaded until this function exits. (Note however that asynchronous functions like setTimeout do not block loading.)
headless boolean Whether Chawan should always start in headless mode. Automatically enabled when Chawan is called with -r.
console-buffer boolean Whether Chawan should open a console buffer in non-headless mode. Defaults to true.
Warning: this is only useful for debugging. Disabling this option without manually redirecting standard error will result in error messages randomly appearing on your screen.
## Buffer Buffer options are to be placed in the `[buffer]` section. Following is a list of buffer options:
Name Value Function
styling boolean Enable/disable author style sheets. Note that disabling this does not affect user styles set in `[css]`.
Defaults to true (i.e. enabled).
scripting boolean Enable/disable JavaScript in *all* buffers.
Defaults to false. For security reasons, users are encouraged to selectively enable JavaScript with `[[siteconf]]` instead of using this setting.
images boolean Enable/disable experimental image support.
Defaults to false.
cookie boolean Enable/disable cookies on sites.
Defaults to false.
Note: in Chawan, each website gets a separate cookie jar, so websites relying on cross-site cookies may not work as expected. You may use the `[[siteconf]]` "cookie-jar" and "third-party-cookie" settings to adjust this behavior for specific sites.
referer-from boolean Enable/disable the "Referer" header.
Defaults to false. For security reasons, users are encouraged to leave this option disabled, only enabling it for specific sites in `[[siteconf]]`.
autofocus boolean When set to true, elements with an "autofocus" attribute are focused on automatically after the buffer is loaded.
Defaults to false.
meta-refresh "never" / "always" / "ask" Whether or not `http-equiv=refresh` meta tags should be respected. "never" completely disables them, "always" automatically accepts all of them, "ask" brings up a pop-up menu.
Defaults to "ask".
## Search Search options are to be placed in the `[search]` section. Following is a list of search options:
Name Value Function
wrap boolean When set to true, searchNext/searchPrev wraps around the document.
ignore-case "auto" / boolean When set to true, document-wide searches are case-insensitive by default. When set to "auto", searches are only case-sensitive when the search term includes a capital letter.
Defaults to "auto".
Note: this can also be overridden inline in the search bar (vim-style), with the escape sequences `\c` (ignore case) and `\C` (strict case). See [search mode](#search-mode) for details.)
## Encoding Encoding options are to be placed in the `[encoding]` section. Following is a list of encoding options:
Name Value Function
document-charset array of charset label strings List of character sets for loading documents.
All listed character sets are enumerated until the document has been decoded without errors. In HTML, meta tags and the BOM may override this with a different charset, so long as the specified charset can decode the document correctly.
display-charset string Character set for keyboard input and displaying documents.
Used in dump mode as well.
(This means that e.g. `cha -I EUC-JP -O UTF-8 a > b` is equivalent to `iconv -f EUC-JP -t UTF-8`.)
## External External options are to be placed in the `[external]` section. Following is a list of external options:
Name Value Function
tmpdir path Directory used to save temporary files.
sockdir path Directory used to store UNIX domain sockets used for inter-process communication.
editor shell command External editor command. %s is substituted for the file name, %d for the line number.
mailcap array of paths Search path for [mailcap](mailcap.md) files.
mime-types array of paths Search path for [mime.types](mime.types.md) files.
cgi-dir array of paths Search path for [local CGI](localcgi.md) scripts.
urimethodmap array of paths Search path for [urimethodmap](urimethodmap.md) files.
w3m-cgi-compat boolean Enable local CGI compatibility with w3m. In short, it redirects `file:///cgi-bin/*` and `file:///$LIB/cgi-bin/*` to `cgi-bin:*`. For further details, see [localcgi.md](localcgi.md).
download-dir string Path to pre-fill for "Save to:" prompts. This is not validated, you can set it to whatever you find useful.
## Input Input options are to be placed in the `[input]` section.
Name Value Function
vi-numeric-prefix boolean Whether vi-style numeric prefixes to commands should be accepted.
When set to true, commands that return a function will be called with the numeric prefix as their first argument.
Note: this only applies for keybindings defined in [page].
use-mouse boolean Whether Chawan is allowed to use the mouse.
Currently, the default behavior imitates that of w3m.
Examples: ``` [input] vi-numeric-prefix = true [page] # Here, the arrow function will be called with the vi numbered prefix if # one was input, and with no argument otherwise. # The numeric prefix can never be zero, so it is safe to test for undefined # using the ternary operator. G = 'n => n ? pager.gotoLine(n) : pager.cursorLastLine()' ``` ## Network Network options are to be placed in the `[network]` section.
Name Value Function
max-redirect number Maximum number of redirections to follow.
prepend-scheme string Prepend this to URLs passed to Chawan without a scheme.
Note that local files (`file:` scheme) will always be checked first; only if this fails, Chawan will retry the request with `prepend-scheme` set as the scheme.
By default, this is set to "https://". Note that the "://" part is mandatory.
prepend-https boolean Deprecated: use prepend-scheme instead.
When set to false, Chawan will act as if prepend-scheme were set to "".
proxy URL Specify a proxy for all network requests Chawan makes. All proxies supported by cURL may be used. Can be overridden by siteconf.
default-headers table Specify a list of default headers for all HTTP(S) network requests. Can be overridden by siteconf.
## Display Display options are to be placed in the `[display]` section. Following is a list of display options:
Name Value Function
color-mode "monochrome" / "ansi" / "eight-bit" / "true-color" / "auto" Set the color mode. "auto" for automatic detection, "monochrome" for black on white, "ansi" for ansi colors, "eight-bit" for 256-color mode, and "true-color" for true colors.
"8bit" is accepted as a legacy alias of "eight-bit". "24bit" is accepted as a legacy alias of "true-color".
format-mode "auto" / ["bold", "italic", "underline", "reverse", "strike", "overline", "blink"] Specifies output formatting modes. Accepts the string "auto" or an array of specific attributes. An empty array (`[]`) disables formatting completely.
no-format-mode ["bold", "italic", "underline", "reverse", "strike", "overline", "blink"] Disable specified formatting modes.
image-mode "auto" / "none" / "sixel" / "kitty" Specifies the image output mode. "sixel" uses sixels for output, "kitty" uses the Kitty image display protocol, "none" disables image display completely.
"auto" tries to detect sixel or kitty support, and falls back to "none" when neither are available.
Defaults to "auto". However, images are still disabled by default, unless you also enable `buffer.images` which allows the browser to actually download images.
sixel-colors "auto" / 2..65535 Only applies when `display.image-mode="sixel"`. Setting a number overrides the number of sixel color registers reported by the terminal, while "auto" leaves color detection to Chawan.
Defaults to "auto".
alt-screen "auto" / boolean Enable/disable the alternative screen.
highlight-color color Set the highlight color. Both hex values and CSS color names are accepted.
highlight-marks boolean Enable/disable highlighting of marks.
double-width-ambiguous boolean Assume the terminal displays characters in the East Asian Ambiguous category as double-width characters. Useful when e.g. ○ occupies two cells.
minimum-contrast number Specify the minimum difference between the luminance (Y) of the background and the foreground. -1 disables this function (i.e. allows black letters on black background, etc).
force-clear boolean Force the screen to be completely cleared every time it is redrawn.
set-title boolean Set the terminal emulator's window title to that of the current page.
default-background-color "auto" / color Overrides the assumed background color of the terminal. "auto" leaves background color detection to Chawan.
default-foreground-color "auto" / color Sets the assumed foreground color of the terminal. "auto" leaves foreground color detection to Chawan.
query-da1 bool Enable/disable querying Primary Device Attributes, and with it, all "dynamic" terminal querying.
It is highly recommended not to alter the default value (which is true), or the output will most likely look horrible. (Except, obviously, if your terminal does not support Primary Device Attributes.)
columns, lines, pixels-per-column, pixels-per-line number Fallback values for the number of columns, lines, pixels per column, and pixels per line for the cases where it cannot be determined automatically. (For example, these values are used in dump mode.)
force-columns, force-lines, force-pixels-per-column, force-pixels-per-line boolean Force-set columns, lines, pixels per column, or pixels per line to the fallback values provided above.
## Protocol Protocol-related rules are to be placed in objects keyed as `[protocol.{protocol-name}]`. e.g. FTP related rules are placed in in `[protocol.ftp]`.
Name Value Function
form-request http, ftp, data, mailto Specify which protocol to imitate when submitting forms to this protocol.
Defaults to HTTP.
## Omnirule The omni-bar (by default opened with C-l) can be used to perform searches using omni-rules. These are to be placed in the table array `[[omnirule]]`. Examples: ``` # Search using DuckDuckGo Lite. (Bound to C-k by default.) [[omnirule]] match = '^ddg:' substitute-url = '(x) => "https://lite.duckduckgo.com/lite/?kp=-1&kd=-1&q=" + encodeURIComponent(x.split(":").slice(1).join(":"))' # Search using Wikipedia, Firefox-style. [[omnirule]] match = '^@wikipedia' substitute-url = '(x) => "https://en.wikipedia.org/wiki/Special:Search?search=" + encodeURIComponent(x.replace(/@wikipedia/, ""))' ``` Omnirule options:
Name Value Function
match regex Regular expression used to match the input string. Note that websites passed as arguments are matched as well.
Note: regexes are handled according to the [match mode](#match-mode) regex handling rules.
substitute-url JavaScript function A JavaScript function Chawan will pass the input string to. If a new string is returned, it will be parsed instead of the old one.
## Siteconf Configuration options can be specified for individual sites. Entries are to be placed in the table array `[[siteconf]]`. Examples: ``` # Enable cookies on the orange website for log-in. [[siteconf]] url = 'https://news\.ycombinator\.com/.*' cookie = true # Redirect npr.org to text.npr.org. [[siteconf]] host = '(www\.)?npr\.org' rewrite-url = ''' (x) => { x.host = "text.npr.org"; const s = x.pathname.split('/'); x.pathname = s.at(s.length > 2 ? -2 : 1); /* No need to return; URL objects are passed by reference. */ } ''' # Allow cookie sharing on *sr.ht domains. [[siteconf]] host = '(.*\.)?sr\.ht' # either 'something.sr.ht' or 'sr.ht' cookie = true # enable cookies share-cookie-jar = 'sr.ht' # use the cookie jar of 'sr.ht' for all matched hosts third-party-cookie = '.*\.sr\.ht' # allow cookies from subdomains ``` Siteconf options:
Name Value Function
url regex Regular expression used to match the URL. Either this or the `host` option must be specified.
Note: regexes are handled according to the [match mode](#match-mode) regex handling rules.
host regex Regular expression used to match the host part of the URL (i.e. domain name/ip address.) Either this or the `url` option must be specified.
Note: regexes are handled according to the [match mode](#match-mode) regex handling rules.
rewrite-url JavaScript function A JavaScript function Chawan will pass the URL to. If a new URL is returned, it will replace the old one.
cookie boolean Whether loading cookies should be allowed for this URL. By default, this is false for all websites.
Overrides `buffer.cookie`.
third-party-cookie array of regexes Domains for which third-party cookies are allowed on this domain. Note: this only works for buffers which share the same cookie jar.
Note: regexes are handled according to the [match mode](#match-mode) regex handling rules.
share-cookie-jar host Cookie jar to use for this domain. Useful for e.g. sharing cookies with subdomains.
referer-from boolean Whether or not we should send a Referer header when opening requests originating from this domain. Simplified example: if you click a link on a.com that refers to b.com, and referer-from is true, b.com is sent "a.com" as the Referer header.
Overrides `buffer.referer-from`.
scripting boolean Enable/disable JavaScript execution on this site. Overrides `buffer.scripting`.
styling boolean Enable/disable author styles (CSS) on this site. Overrides `buffer.styling`.
images boolean Enable/disable image display on this site. Overrides `buffer.images`.
document-charset charset label string Specify the default encoding for this site. Overrides `encoding.document-charset`.
stylesheet CSS stylesheet Specify an additional user-stylesheet for this site. Note: other user-stylesheets (specified under [css] or additional matching siteconfs) are not overridden. (In other words, they will be concatenated with this stylesheet to get the final user stylesheet.)
proxy URL Specify a proxy for network requests fetching contents of this buffer. Overrides `network.proxy`.
default-headers table Specify a list of default headers for HTTP(S) network requests to this buffer. Overrides `network.default-headers`.
insecure-ssl-no-verify boolean Defaults to false. When set to true, this disables peer and hostname verification for SSL keys on this site, like `curl --insecure` would.
WARNING: this is insecure, and opens up your connections to man-in-the-middle attacks. Please do not use this unless you are absolutely sure you know what you are doing.
autofocus boolean When set to true, elements with an "autofocus" attribute are focused on automatically after the buffer is loaded. Overrides `buffer.autofocus`.
meta-refresh "never" / "always" / "ask" Whether or not `http-equiv=refresh` meta tags should be respected. "never" completely disables them, "always" automatically accepts all of them, "ask" brings up a pop-up menu.
Overrides `buffer.meta-refresh`.
## Stylesheets User stylesheets are to be placed in the `[css]` section. There are two ways to import user stylesheets: 1. Include a user stylesheet using the format `include = 'path-to-user.css'`. To include multiple stylesheets, use `include = ['first-stylesheet.css, second-stylesheet.css']`. Relative paths are interpreted relative to the config directory. 2. Place your stylesheet directly in your configuration file using `inline = """your-style"""`. ## Keybindings Keybindings are to be placed in these sections: * for pager interaction: `[page]` * for line editing: `[line]` Keybindings are configured using the syntax '' = '' Where `` is a combination of unicode characters with or without modifiers. Modifiers are the prefixes `C-` and `M-`, which add control or escape to the keybinding respectively (essentially making `M-` the same as `C-[`). Modifiers can be escaped with the `\` sign. `` is either a command defined in the `[cmd]` section, or a JavaScript expression. Here we only describe the pre-defined actions in the default config; for a description of the API, please see: [the API documentation](api.md). Examples: ```toml # show change URL when Control, Escape and j are pressed 'C-M-j' = 'cmd.pager.load' # go to the first line of the page when g is pressed twice without a preceding # number, or to the line when a preceding number is given. 'gg' = 'cmd.buffer.gotoLineOrStart' ``` ### Pager actions
Default key Name Function
q `cmd.pager.quit` Exit the browser.
C-z `cmd.pager.suspend` Temporarily suspend the browser
Note: this also suspends e.g. buffer processes or CGI scripts. So if you are downloading something, that will be delayed until you restart the process.
C-l `cmd.pager.load` Open the current address in the URL bar.
C-k `cmd.pager.webSearch` Open the URL bar with an arbitrary search engine. At the moment, this is DuckDuckGo Lite, but this may change in the future.
M-u `cmd.pager.dupeBuffer` Duplicate the current buffer by loading its source to a new buffer.
U `cmd.pager.reloadBuffer` Open a new buffer with the current buffer's URL, replacing the current buffer.
C-g `cmd.pager.lineInfo` Display information about the current line on the status line.
\ `cmd.pager.toggleSource` If viewing an HTML buffer, open a new buffer with its source. Otherwise, open the current buffer's contents as HTML.
D `cmd.pager.discardBuffer` Discard the current buffer, and move back to the previous/next buffer depending on what the previously viewed buffer was.
d,, d. `cmd.pager.discardBufferPrev`, `cmd.pager.discardBufferNext` Discard the current buffer, and move back to the previous/next buffer, or open the link under the cursor.
M-d `cmd.pager.discardTree` Discard all child buffers of the current buffer.
., ,, M-,, M-., M-/ `cmd.pager.nextBuffer`, `cmd.pager.prevBuffer`, `cmd.pager.prevSiblingBuffer`, `cmd.pager.nextSiblingBufer`, `cmd.pager.parentBuffer` Traverse the buffer tree.
`nextBuffer` and `prevBuffer` are the most intuitive, traversing the tree as if it were a linked list.
`prevSiblingBuffer` and `nextSiblingBuffer` cycle through the buffers opened from the same buffer.
Finally, `parentBuffer` always returns to the buffer the current buffer was opened from, even if e.g. the user returns and opens another page "in between".
M-c `cmd.pager.enterCommand` Directly enter a JavaScript command. Note that this interacts with the pager, not the website being displayed.
None `cmd.pager.searchForward`, `cmd.pager.searchBackward` Search for a string in the current buffer, forwards or backwards.
/, ? `cmd.pager.isearchForward`, `cmd.pager.searchBackward` Incremental-search for a string, highlighting the first result, forwards or backwards.
n, N `cmd.pager.searchNext`, `cmd.pager.searchPrev` Jump to the nth (or if unspecified, first) next/previous search result.
c `cmd.pager.peek` Display a message of the current buffer's URL on the status line.
u `cmd.pager.peekCursor` Display a message of the URL or title under the cursor on the status line. Multiple calls allow cycling through the two. (i.e. by default, press u once -> title, press again -> URL)
su `cmd.pager.showFullAlert` Show the last alert inside the line editor. You can also view previous ones using C-p or C-n.
M-y `cmd.pager.copyURL` Copy the current buffer's URL to the system clipboard.
yu `cmd.pager.copyCursorLink` Copy the link under the cursor to the system clipboard.
yI `cmd.pager.copyCursorImage` Copy the URL of the image under the cursor to the system clipboard.
M-p `cmd.pager.gotoClipboardURL` Go to the URL currently on the clipboard.
### Buffer actions Note: `n` in the following text refers to a number preceding the action. e.g. in `10gg`, n = 10. If no preceding number is input, then it is left unspecified.
Default key Name Function
j, k `cmd.buffer.cursorUp`, `cmd.buffer.cursorDown` Move the cursor upwards/downwards by n lines, or if n is unspecified, by 1.
h, l `cmd.buffer.cursorLeft`, `cmd.buffer.cursorRight` Move the cursor to the left/right by n cells, or if n is unspecified, by 1.
0 `cmd.buffer.cursorLineBegin` Move the cursor to the first cell of the line.
^ `cmd.buffer.cursorLineTextStart` Move the cursor to the first non-blank character of the line.
$ `cmd.buffer.cursorLineEnd` Move the cursor to the last cell of the line.
w, W `cmd.buffer.cursorNextWord`, `cmd.buffer.cursorNextViWord`, `cmd.buffer.cursorNextBigWord` Move the cursor to the beginning of the next [word](#word-types).
None `cmd.buffer.cursorPrevWord`, `cmd.buffer.cursorPrevViWord`, `cmd.buffer.cursorPrevBigWord` Move the cursor to the end of the previous [word](#word-types).
e, E `cmd.buffer.cursorWordEnd`, `cmd.buffer.cursorViWordEnd`, `cmd.buffer.cursorBigWordEnd` Move the cursor to the end of the current [word](#word-types), or if already there, to the end of the next word.
b, B `cmd.buffer.cursorWordBegin`, `cmd.buffer.cursorViWordBegin`, `cmd.buffer.cursorBigWordBegin` Move the cursor to the beginning of the current [word](#word-types), or if already there, to the end of the previous word.
[, ] `cmd.buffer.cursorPrevLink`, `cmd.buffer.cursorNextLink` Move the cursor to the end/beginning of the previous/next clickable element (e.g. link, input field, etc).
{, } `cmd.buffer.cursorPrevParagraph`, `cmd.buffer.cursorNextParagraph` Move the cursor to the end/beginning of the nth previous/next paragraph.
None `cmd.buffer.cursorRevNthLink` Move the cursor to the nth link of the document, counting backwards from the document's last line.
None `cmd.buffer.cursorNthLink` Move the cursor to the nth link of the document.
C-b, C-f, zH, zL `cmd.buffer.pageUp`, `cmd.buffer.pageDown`, `cmd.buffer.pageLeft`, `cmd.buffer.pageRight` Scroll up/down/left/right by n pages, or if n is unspecified, by one page.
C-u, C-d `cmd.buffer.halfPageUp`, `cmd.buffer.halfPageDown`, `cmd.buffer.halfPageLeft`, `cmd.buffer.halfPageUp` Scroll up/down/left/right by n half pages, or if n is unspecified, by one page.
K/C-y, J/C-e, zh, zl `cmd.buffer.scrollUp`, `cmd.buffer.scrollDown`, `cmd.buffer.scrollLeft`, `cmd.buffer.scrollRight` Scroll up/down/left/right by n lines, or if n is unspecified, by one line.
Enter/Return `cmd.buffer.click` Click the HTML element currently under the cursor.
R `cmd.buffer.reshape` Reshape the current buffer (=render the current page anew.) Useful if the layout is not updating even though it should have.
r `cmd.buffer.redraw` Redraw screen contents. Useful if something messed up the display.
None (see gotoLineOrStart/End instead) `cmd.buffer.cursorFirstLine`, `cmd.buffer.cursorLastLine` Move to the beginning/end in the buffer.
H `cmd.buffer.cursorTop` Move to the first line on the screen. (Equivalent to H in vi.)
M `cmd.buffer.cursorMiddle` Move to the line in the middle of the screen. (Equivalent to M in vi.)
L `cmd.buffer.cursorBottom` Move to the last line on the screen. (Equivalent to L in vi.)
zt, z Return, zz, z., zb, z- `cmd.buffer.raisePage`, `cmd.buffer.raisePageBegin`, `cmd.buffer.centerLine`, `cmd.buffer.centerLineBegin`, `cmd.buffer.lowerPage`, `cmd.buffer.lowerPageBegin` If n is specified, move cursor to line n. Then, * `raisePage` scrolls down so that the cursor is on the top line of the screen. (vi `z`, vim `zt`.) * `centerLine` shifts the screen so that the cursor is in the middle of the screen. (vi `z.`, vim `zz`.) * `lowerPage` scrolls up so that the cursor is on the bottom line of the screen. (vi `z-`, vim `zb`.) The -`Begin` variants also move the cursor to the line's first non-blank character, as the variants originating from vi do.
z+ `cmd.buffer.nextPageBegin` If n is specified, move to the screen before the nth line and raise the page. Otherwise, go to the previous screen's last line and raise the page.
z^ `cmd.buffer.previousPageBegin` If n is specified, move to the screen before the nth line and raise the page. Otherwise, go to the previous screen's last line and raise the page.
g0, gc, g$ `cmd.buffer.cursorLeftEdge`, `cmd.buffer.cursorMiddleColumn`, `cmd.buffer.cursorRightEdge` Move to the first/middle/last column on the screen.
None `cmd.buffer.centerColumn` Center screen around the current column. (w3m `Z`.)
gg, G `cmd.buffer.gotoLineOrStart`, `cmd.buffer.gotoLineOrEnd` If n is specified, jump to line n. Otherwise, jump to the start/end of the page.
m `cmd.buffer.mark` Wait for a character `x` and then set a mark with the ID `x`.
`, ' `cmd.buffer.gotoMark`, `cmd.buffer.gotoMarkY` Wait for a character `x` and then jump to the mark with the ID `x` (if it exists on the page).
`gotoMark` sets both the X and Y positions; gotoMarkY only sets the Y position.
: `cmd.buffer.markURL` Convert URL-like strings to anchors on the current page.
s Return `cmd.buffer.saveLink` Save resource from the URL pointed to by the cursor to the disk.
sS `cmd.buffer.saveSource` Save the source of the current buffer to the disk.
### Line-editing actions
Default key Name Function
Return `cmd.line.submit` Submit the line.
C-c `cmd.line.cancel` Cancel the current operation.
C-h, C-d `cmd.line.backspace`, `cmd.line.delete` Delete character before (backspace)/after (delete) the cursor.
C-u, C-k `cmd.line.clear`, `cmd.line.kill` Delete text before (clear)/after (kill) the cursor.
C-w, M-d `cmd.line.clearWord`, `cmd.line.killWord` Delete word before (clear)/after (kill) the cursor.
C-b, C-f `cmd.line.backward`, `cmd.line.forward` Move cursor backward/forward by one character.
M-b, M-f `cmd.line.prevWord`, `cmd.line.nextWord` Move cursor to the previous/next word by one character
C-a, C-e `cmd.line.begin`, `cmd.line.end` Move cursor to the beginning/end of the line.
C-v `cmd.line.escape` Ignore keybindings for next character.
C-p, C-n `cmd.line.prevHist`, `cmd.line.nextHist` Jump to the previous/next history entry
Note: to facilitate URL editing, the line editor has a different definition of what a word is than the pager. For the line editor, a word is either a sequence of alphanumeric characters, or any single non-alphanumeric character. (This means that e.g. `https://` consists of four words: `https`, `:`, `/` and `/`.) ```Examples: # Control+A moves the cursor to the beginning of the line. 'C-a' = 'cmd.line.begin' # Escape+D deletes everything after the cursor until it reaches a word-breaking # character. 'M-d' = 'cmd.line.killWord' ``` ## Appendix ### Regex handling Regular expressions are currently handled using libregexp which is included in QuickJS. This means that all regular expressions work as in JavaScript. There are two different modes of regex preprocessing in Chawan: "search" mode, and "match" mode. "match" mode is used for configurations (meaning in all values in this document described as "regex"). "search" mode is used for the on-page search function (using searchForward/isearchForward etc.) #### Match mode Regular expressions are assumed to be exact matches, except when they start with a caret (^) sign or end with an unescaped dollar ($) sign. In other words, the following transformations occur: ``` ^abcd -> ^abcd (no change, only beginning is matched) efgh$ -> efgh$ (no change, only end is matched) ^ijkl$ -> ^ijkl$ (no change, the entire line is matched) mnop -> ^mnop$ (changed to exact match, the entire line is matched) ``` Match mode has no way to toggle JavaScript regex flags like `i`. #### Search mode For on-page search, the above transformations do not apply; the search `/abcd` searches for the string `abcd` inside all lines. "Search" mode also has some other convenience transformations: * The string `\c` (backslash + lower-case c) inside a search-mode regex enables case-insensitive matching. * Conversely, `\C` (backslash + capital C) disables case-insensitive matching. (Useful if you have `ignore-case` set to true, which is the default.) * `\<` and `\>` is converted to `\b` (as in vi, grep, etc.) Note that none of these work in "match" mode. ### Path handling Rules for path handling are similar to how strings in the shell are handled. * Tilde-expansion is used to determine the user's home directory. So e.g. `~/whatever` works. * Environment variables can be used like `$ENV_VAR`. * Relative paths are relative to the Chawan configuration directory. Some internal variables are also defined by Chawan. These can be accessed using the non-standard syntax `${%VARIABLE}`: * `${%CHA_BIN_DIR}`: the directory which the `cha` binary resides in. Note that symbolic links are automatically resolved to determine this path. * `${%CHA_LIBEXEC_DIR}`: the directory for all executables Chawan uses for operation. By default, this is `${%CHA_BIN_DIR}/../libexec/chawan`. ### Word types Word-based pager commands can operate with different definitions of words. Currently, these are: * w3m words * vi words * Big words #### w3m word A w3m word is a sequence of alphanumeric characters. Symbols are treated in the same way as whitespace. #### vi word A vi word is a sequence of alphanumeric characters, OR a sequence of symbols. vi words may be separated by whitespace; however, symbolic and alphanumeric vi words do not have to be whitespace-separated. e.g. following character sequence contains two words: ``` hello[]+{}@`! ``` #### Big word A big word is a sequence of non-whitespace characters. It is essentially the same as a w3m word, but with symbols being defined as non-whitespace.