Provided by: dwb_20130503hg-2ubuntu1_amd64 
NAME
dwb-js - dwb's javascript api documentation
DESCRIPTION
dwb provides a javascript api that can be used to write userscripts or extensions for dwb.
GETTING STARTED
Scripts that use the javascript api must be located in $XDG_CONFIG_HOME/dwb/userscripts like any other
script. Scripts that use the javascript api must either start with
#!javascript
or with
//!javascript
All native javascript methods can be used in scripts, however there are limitations:
• The execution context of userscripts is completely separated from the web execution context. Due to
security concerns it is not possible to communicate with the web execution context, it is only
possible to inject scripts into the web context.
• In contrast to the global window object in the web execution context, the global object is a readonly
object, i.e. it is not possible to set properties on the global object, see also Global data for
details.
GLOBAL
Properties
global (Object, read)
Refers to the global object
session (SoupSession, read)
The webkit session
Methods
Boolean bind(String shortcut, Function callback, [String name])
Bind a javascript function to a shortcut. This is the preferred method of binding keys to shortcuts
since the shortcut is evaluated using the native method, but also the keyPress-signal can be used to
bind shortcuts.
shortcut
A shortcut shortcut, will be parsed the same way as if set in dwb:keys
callback
Callback function that will be called when the shortcut is pressed
name
A name that identifies the function on command line, optional
returns
true if the function was bound successfully
Boolean execute(String command)
Executes a dwb command
command
a dwb command to execute, will be parsed the same way as if executed from commandline
returns
true if execution was successful
Boolean exit()
Exit dwb, must be called if the script is running from commandline.
Object include(String path, [Boolean global])
Includes a file. Note that there is only one context, all scripts are executed in this context.
Included files are not visible in other scripts unless true is passed as second parameter.
path
Path to a file to include
global
Whether to include the script into the global scope, optional
returns
The return value of the included file
Note
Scripts included with include are either visible in the global scope or invisible, even in the
including script. To use an included script it can return an object with its public objects:
// included script
var private = 37;
return {
getPrivate : function () {
return private;
}
};
// Scripts that includes the above
var i = include("/path/to/script");
var p = i.getPrivate(); // 37
or define a module that can be shared:
// included script
var private = 37;
provide("foo", {
getPrivate : function() {
return private;
}
});
// Scripts that includes the above
var i = include("/path/to/script");
require(["foo"], function(foo) {
var bar = foo.getPrivate(); // 37
})
void provide(String name, Object module)
Defines a module that can be used in other scripts, see MODULES for details.
name
Name of the module
module
The module
void replace(String name, Object module)
Same as provide but replaces the module if it was already defined.
name
Name of the module
module
The module, if omitted the module will be deleted, all references to that module will reference
an empty object afterwards, optional.
void require(Array names, Function callback)
Load modules defined with provide.
names
An array of module names or null to get all modules, a module name can also contain a path, the
path must be separated with a ! from the module name, see also MODULES for details.
callback
A callback function that is called after initialization of all scripts and modules. The
parameters of the callback function correspond to the names array. If names is null the function
is called with one parameter that contains all modules, see also MODULES for examples.
Number unbind(Function func|String name)
Unbind a shortcut that was previously bound with bind
func or name
Either the function or the optional name passed to bind.
returns
true if the function was unbound
GLOBAL OBJECTS
data
The data object can be used to determine internally used data securely. All properties are readonly
Strings.
data.bookmarks
Bookmark file
data.cacheDir
Cache directory
data.configDir
Config directory
data.cookies
Cookie file
data.cookiesWhitelist
Whitelist for persistent cookies
data.customKeys
Custom keyboard shortcuts
data.history
History file
data.keys
Shortcuts configuration file
data.pluginsWhitelist
Whitelist for the plugin blocker
data.profile
Profile which will be default unless another profile is specified on command line
data.quickmarks
Quickmark file
data.scriptWhitelist
Whitelist for scripts
data.session
File with stored sessions for this profile
data.sessionCookiesWhitelist
Whitelist for session cookies
data.settings
Settings configuration file
data.searchEngines
Searchengines
io
The io object implements methods for input and output.
void io.debug([Object detail])
Prints a debug message and the call stack to stderr.
detail
Message details, optional
detail.message
The message to show, optional
detail.error
An Error object, optional
detail.arguments
Arguments, optional
Array io.dirNames(String path)
Get directory entries.
path
A path to a directory
returns
An array with the directory names
void io.error(String text)
Shows an error message in the browser window.
text
The message to show
void io.notify(String text)
Shows a message in the browser window.
text
The message to show
void io.print(String text, [String stream])
Print text to stdout or stderr
text
the text to print
stream
pass "stderr" to print to stderr, optional
String io.prompt(String text, [Boolean visible])
Gets user input synchronously.
text
The message for the prompt
visible
Whether the chars should be visible, pass false for a password prompt, default true, optional
returns
The text that was entered or null
String io.read(String path)
Read from a file.
path
Path to a file that should be read
returns
A string with the file content
Boolean io.write(String path, String mode, String text)
Write to a file
path
Path to a file to write to
mode
Either "a" to append to the file, or "w" to strip the file or create a new file.
text
The text that should be written to the file
returns
true if writing was successful
system
The system object implements system methods.
Boolean system.fileTest(String path, FileTest flags)
Checks for FileTest flags on a file.
path
Path to a file to check
flags
The flags to test
returns
true if any of the test on the flags is true
String system.getEnv(String name)
Get a system environment variable
name
Name of the variable
returns
The variable or null if the variable wasn’t found
Boolean system.mkdir(String path, Number mode)
Creates a directory and all parent directories.
path
Path to create
mode
The permissions the directory will get
returns
true if creation was successful or directory already existed
Deferred system.spawn(String command, [Function stdout], [Function stderr], [Object environ])
Executes a shell command using the default search path
command
The command to execute
stdout(String)
Callback function for stdin, any strings returned from the callback are passed to stdin of the
spawned process, pass null if only stderr is needed, optional
stderr(String)
Callback function for stderr, any strings returned from the callback are passed to stdin of the
process, pass null if stderr is not needed and environment variables should be set, optional
environ
Object that can be used to add environment variables to the environment, optional.
returns
A deferred, it will be resolved if the child exits normally, it will be rejected if the child
process exits abnormally, the first parameter of the reject function will be the status code of
the child process.
Object system.spawnSync(String command, [Object environment])
Executes a shell command synchronously using the default search path
command
The command to execute
environment
Object that can be used to add environment variables to the environment, optional.
returns
An object that contains stdout, stderr and status.
tabs
The tabs object implements methods and properties to get webview objects.
tabs.current (webview, read)
The currently focused webview
tabs.length (Number, read)
Total number of tabs
tabs.number (Number, read)
Number of the currently focused tab
webview tabs.nth(Number n)
Gets the webview object of the nth tab
n
Number of the tab
returns
The corresponding webview
net
Network related functions
String net.domainFromHost(String hostname)
Gets the base domain name from a hostname where the base domain name is the effective second level
domain name, e.g. for www.example.com it will be example.com, for www.example.co.uk it will be
example.co.uk.
hostname
a hostname
returns
the base domain
void net.sendRequest(String uri, Function callback, [String method], [Object data])
Sends a http-request.
uri
The uri the request will be sent to.
callback
A callback that will be called when the request is finished, the callback has 2 parameters, the
first will be an object that contains body and headers, the second the associated SoupMessage.
method
The http request method, default GET, optional.
data
Data to sent if method is POST
data.contentType
The content type
data.data
The data to sent
returns
True if the request was sent.
Object net.sendRequestSync(String uri, [String method])
Sends a http-request synchronously.
uri
The uri the request will be sent to.
method
The http request method, default GET, optional.
returns
Object that contains the response body, the response headers and the http status code of the
request.
timer
Functions for timed execution
Number timer.start(Number interval, Function func)
Executes a function repeatedly until the function returns false or timerStop is called on the id
returned from this function
interval
Interval in milliseconds
func
Function to execute
returns
An id that can be passed to timerStop
Number timer.stop(Number id)
Stops a timer started by timerStart
id
The id returned from timerStart
returns
true if the timer was stopped
util
The util object implements helper methods.
String util.camelize(String text)
Converts a non-camelcase string to a camelcase string.
text
A non-camelcase string
returns
The a camelcase string
Computes a checksum for given data.
shortcut
The to compute the checksum for.
type
The type of the checksum, optional, defaults to ChecksumType.sha256
returns
The checksum
String util.getBody(Function func)
Gets the body of a function, useful for scripts that will be injected into sites.
func
A function
returns
The body of the function as a string
String util.dispatchEvent(Number event, Modifier modifier, Number keyval)
Dispatches a keyboard event.
event
A GdkEventType
modifier
A Modifier
keyval
A keyval as listed in gdkkeysyms.h
returns
True if the event was dispatched
Number util.getMode()
Gets the the current mode.
returns
The mode, see Modes for possible modes.
String util.getSelection()
Get selected text from the focused webview.
returns
The selection or null if no text was selected.
String util.markupEscape(String text)
Escapes text for usage with pango markup.
text
A text to escape
returns
The escaped text or null;
String util.mixin(Object self, Object ...)
Mixes properties of objects into an object. Properties are mixed in from left to right, so properties
will not be overwritten in the leftmost object if they are already defined.
self
An object
Object...
Variable number of objects to mix in.
returns
self or a new object if self is null or undefined
void util.tabComplete(String label, Array items, Function callback, [Boolean readonly])
Initiates tab completion.
label
The command line label
items
An array of objects, each object can have 2 properties, left which will be the left completion
label and right which will be the right completion label.
callback
Callback function, the first argument will be the returned string from the url bar.
readonly
Whether the items are readonly, default false, optional.
void util.uncamelize(String text)
Converts camel-case string for usage with GObject properties to a non-camel-case String
text
The text to uncamlize
returns
The uncamelized string
dwb also adds additional methods to builtin objects
void Object.forEach(Function func(String key, Object value, Object this))
Executes a function for each enumarable property of this similar to Array.forEach.
func
The function to execute
key
The property name
value
The property value
this
The object forEach is called on
Number Array.fastIndexOf(Object object)
This method is basically the same as Array.indexOf but without type checking.
object
The object to search for
returns
The index in the array or -1 if the Object wasn’t found.
Number Array.fastLastIndexOf(Object object)
This method is basically the same as Array.lastIndexOf but without type checking.
object
The object to search for
returns
The index in the array or -1 if the Object wasn’t found.
void Function.debug([Object scope])
A wrapper method for debugging callbacks, especially useful if it is combined with script.
scope
script or this, optional
returns
A new function that calls script.debug on errors.
clipboard
void clipboard.get(Selection selection, [Function callback])
Gets the X11 clipboard.
selection
The Selection to get
callback
If a callback function is used the clipboard will be fetched asynchronously, the first parameter
will be the content of the clipboard, else it will be fetched synchronously
returns
If no callback was provided it returns the text content of the clipboard.
void clipboard.set(Selection selection, String text)
Sets the X11 clipboard.
selection
The Selection to set
text
Text that will be stored in the clipboard.
gui
Most gtk-widgets can be accessed from scripts, an overview of the layout can be found under
https://portix.bitbucket.org/dwb/resources/layout.html.
gui.window (GtkWindow, read)
The main window.
gui.mainBox (GtkBox, read)
The the main container, child of gui.window.
gui.tabBox (GtkBox, read)
The box used for tab labels, child of gui.mainBox.
gui.contentBox (GtkBox, read)
The box used for the main content, it contains all webviews, child of gui.mainBox.
gui.statusWidget (GtkEventBox, read)
The outmost statusbar widget, used for setting the statusbars colors, child of gui.mainBox.
gui.statusAlignment (GtkAlignment, read)
Used for the statusbar alignment, child of gui.statusWidget.
gui.statusBox (GtkBox, read)
The box that contains the statusbar widgets, grandchild of gui.statusAlignment.
gui.messageLabel (GtkLabel, read)
Label used for notifications, first child of gui.statusBox.
gui.entry (GtkEntry, read)
The entry, second child of gui.statusBox.
gui.uriLabel (GtkLabel, read)
Label used for displaying uris, third child of gui.statusBox.
gui.statusLabel (GtkLabel, read)
Label used for status information, fourth child of gui.statusBox.
Deferred
Deferred objects can be used to manage asynchronous operations. It can trigger a callback function when
an asynchrounous operation has finished, and allows one to chaining of callbacks. Deferred basically has
2 callback chains, a done-chain and a fail-chain. If a asynchronous operation is successful the deferred
should be resolved and the done callback chain of the deferred is called. If a asynchronous operation
fails the deferred should be rejected and the fail callback chain of the deferred is called.
Deferreds implement the following methods:
void Deferred.always(Function callback)
Registers a function for then done and fail chain.
callback
A callback function that will be called when the Deferred is resolved or rejected. If the
function returns a deferred the original deferred will be replaced with the new deferred.
returns
A new deferred that can be used to chain callbacks.
void Deferred.done(Function callback)
Registers a function for the done-chain.
callback
A callback function that will be called when the Deferred is resolved. If the function returns a
deferred the original deferred will be replaced with the new deferred.
returns
A new deferred that can be used to chain callbacks.
Deferred Deferred.fail(Function callback)
Registers a function for the fail-chain.
callback
A callback function that will be called when the deferred is rejected. If the function returns a
deferred the original deferred will be replaced with the new deferred.
returns
A new deferred that can be used to chain callbacks.
Deferred Deferred.reject(arguments)
Rejects a deferred, the fail-chain is called when a deferred is rejected.
arguments
Arguments passed to the fail callbacks.
void Deferred.resolve(arguments)
Resolves a deferred, the done-chain is called when a deferred is resolved.
arguments
Arguments passed to the done callbacks.
Deferred Deferred.then(Function ondone, Function onfail)
Registers a function for the done and fail chain.
ondone
A callback function that will be called when the deferred is resolved. If the function returns a
deferred the original deferred will be replaced with the new deferred.
onfail
A callback function that will be called when the deferred is rejected. If the function returns a
deferred the original deferred will be replaced with the new deferred.
returns
A new deferred that can be used to chain callbacks.
Deferred also implements a static method:
Value Deferred.when(Value value, Function ondone, Function onfail)
Static method that can be used for synchronous and asynchronous operations. If if value is a Deferred
ondone is called when the Deferred is resolved and onfail is called if the Deferred is rejected,
otherwise ondone is called and value is the first parameter of the callback.
value
A Deferred or a value.
ondone
Callback function.
onfail
Callback function.
returns
The value.
Simple usage of a deferred:
function loadUri(uri) {
var d = new Deferred();
tabs.current.loadUri(uri, function(wv) {
if (wv.loadStatus == LoadStatus.finished)
{
d.resolve("Finished");
return true;
}
else if (wv.loadStatus == LoadStatus.failed)
{
d.reject("Failed");
return true;
}
});
return d;
}
loadUri("http://www.example.com").then(
function(response) {
io.print(response); // Finished
},
function(response) {
io.print(response); // Failed
}
);
Chaining of a deferred:
function foo()
{
var d = new Deferred();
timer.start(2000, function() {
d.reject("rejected");
});
return d;
}
function onResponse(response)
{
io.print(response);
}
// Will print "rejected" twice to stdout after 2 seconds
foo().fail(onResponse).fail(onResponse);
Note that if the deferred is rejected only the fail chain is called, when it is resolved only the
done chain is called.
function foo()
{
var d = new Deferred();
timer.start(2000, function() {
d.reject("rejected");
// Already rejected, will not execute the done chain
d.resolve("rejected");
});
return d;
}
function onResponse(response)
{
io.print(response);
}
// Only the fail will be executed
foo().fail(onResponse).done(onResponse);
foo().done(onResponse).fail(onResponse);
Changing the deferred in a callback chain:
function foo(message)
{
var d = new Deferred();
timer.start(2000, function() {
d.resolve(message);
});
return d;
}
function callback1(response)
{
io.print(response); // Prints "foo" after 2 seconds
// Return a new Deferred, will replace the old one.
return foo("bar");
}
function callback2(response)
{
io.print(response); // Prints "bar" after 4 seconds
}
foo("foo").done(callback1).done(callback2);
Using Deferred.when
function asyncOperation() {
var d = new Deferred();
....
return d;
}
function syncOperation()
{
var result = {};
....
return result;
}
Deferred.when(asyncOperation(), function() {...});
Deferred.when(syncOperation(), function() {...});
Glob
Globs can be used for pattern matching, they are much simpler than regular expressions, there are only
two special characters, the wildcard character * which matches any number of unknown characters and the
joker character ? which matches exactly one unknown character. The literal characters "*" and "?" must be
escaped with "\\";
new Glob(String pattern)
Constructs a new Glob.
pattern
The pattern to match against.
Boolean Glob.match(String string)
Matches against a string
string
The string to match against.
returns
True if the string matches the Glob.
String Glob.toString()
Converts a Glob to string.
returns
A string represantation of the Glob.
settings
Readonly object that can be used to query dwb’s current settings, all settings can also be used in
camelcase, to modify settings execute can be used.
if (settings.enablePrivateBrowsing == true)
execute("set enable-private-browsing false");
WEBKIT OBJECTS
All webkit objects correspond to gobject objects, i.e. they have the same properties, but the javascript
properties are all camelcase. For example, a WebKitWebView has the property zoom-level, the corresponding
javascript property is zoomLevel:
var webview = tabs.current
webview.zoomLevel = webview.zoomLevel * 2;
To check if an object is derived from GObject the instanceof operator can be used:
if (myObject instanceof GObject)
{
...
}
General methods
The following methods are implemented by all Objects derived from GObject
void object.blockSignal(Number signalid)
Blocks emission of a gobect signal.
signalid
The signalid returned from object.connect
Number object.connect(String name, Function callback, [Boolean after])
Connect to a gobject-signal, note that all signals are connected using the signal::- or with
notify::-prefix. If connecting to a signal the signal::-prefix must be omitted. The callback function
will have the same parameters as the GObject signal callback, however some parameters may be
undefined if they cannot be converted to javascript objects. All signal handlers are executed after
dwb’s default handler.
name
The signal name to connect to.
callback
Callback function that will be called when the signal is emitted.
after
Whether to install the handler after the default handler, default false.
returns
The signal id of the signal.
Number object.connectBlocked(String name, Function callback, [Boolean after])
Connect to a gobject-signal but block the emission of the own callback during execution of the
callback, useful if the object is connected to a notify event and the the property is changed in the
callback function.
name
The signal name to connect to.
callback
Callback function that will be called when the signal is emitted.
after
Whether to install the handler after the default handler, default false.
returns
The signal id of the signal.
Boolean object.disconnect(Number id)
Disconnect from a gobject-signal.
id
The signal id obtained from connect
returns
true if the signal was disconnected
Number object.notify(String name, Function callback, [Boolean after])
Wrapper function for property-change notification, the same as object.connect("notify::" + name,
callback, after);.
name
The property name to connect to, the name can also be in camelcase.
callback
Callback function that will be called when the property changes.
after
Whether to install the handler after the default handler, default after.
returns
The signal id of the signal.
Number object.notifyBlocked(String name, Function callback, [Boolean after])
Wrapper function for property-change notification, the same as object.connectBlocked("notify::" +
name, callback, after);.
name
The property name to connect to, the name can also be in camelcase.
callback
Callback function that will be called when the property changes.
after
Whether to install the handler after the default handler, default after.
returns
The signal id of the signal.
void object.unblockSignal(Number signalid)
Unblocks a signal previously blocked with object.blockSignal.
signalid
The signalid returned from object.connect
webview
The webview object represents the widget that actually displays the site content.
wv.allFrames (Array of frames, read)
All frames of a webview including the mainframe
wv.focusedFrame (Frame, read)
The focused frame of the webview
wv.historyList (Historylist, read)
The focused frame of the webview
wv.mainFrame (Frame, read)
The main frame of the webview
wv.number (Number, read)
The number of the webview, starting at 0
wv.scrolledWindow (GtkScrollwindow, read)
The parent widget of every webview, it is used for scrolling the webview.
wv.tabWidget (GtkEventBox, read)
The main widget for tab labels, used for coloring tabs, child of gui.tabBox.
wv.tabBox (GtkBox, read)
Horizontal box, child of wv.tabWidget.
wv.tabIcon (GtkImage, read)
Favicon widget, child of wv.tabBox.
wv.tabLabel (GtkLabel, read)
Text label of a tab, child of wv.tabBox.
String wv.inject([String code|Function code], [Object arg], [Boolean global])
Injects a script into a webview
code
The script to inject, either a string or a function. If it is a function the body will be wrapped
inside a new function.
arg
If the script isn’t injected into the global scope the script is wrapped inside a function. arg
then is accesible via arguments in the injected script, optional
line
Starting line number, useful for debugging. If linenumber is greater than 0 error messages will
be printed to stderr, optional.
global
true to inject it into the global scope, false to encapsulate it in a function, optional
returns
The return value of the script. If the script is injected globally inject always returns null.
The return value is always converted to a string. To return objects call JSON.parse on the return
value.
Note
If a script is injected from a loadStatus-callback the script must be injected after
LoadStatus.committed has been emitted. On LoadStatus.committed the document hasn’t been created,
if the script modifies the DOM it should be injected when LoadStatus.finished or documentLoaded
is emitted. If only LoadStatus.committed or loadFinished.committed are used it is better to use
the corresponding signals instead to reduce overhead.
void wv.history(Number steps)
Loads a history item steps away from the current history item
steps
Number of steps, pass a negative value to go back in history
Boolean wv.loadUri(String uri, [Function callback])
Loads an uri in a webview.
uri
The uri to load
callback
A callback function that will be called when the load status changes, return true to stop the
emission, optional
returns
true if the uri is loaded
void wv.reload(void)
Reloads a webview
void wv.stopLoading()
Stops any ongoing loading.
Number wv.toPng(String filename, [Number width, Number height], [Boolean keepAspect])
Renders a webview to a png file.
filename
The filename for the png.
width
The width of the png, if width is < 0 and height is > 0 the image will have the same aspect ratio
as the original webview, optional.
height
The height of the png, if height is < 0 and width is > 0 the image will have the same aspect
ratio as the original webview, optional, mandatory if width is set.
keepAspect
Whether to keep the aspect ratio, if set to true the new image will have the same aspect ratio as
the original webview, width and height are taken as maximum sizes and must both be > 0, optional.
returns
A cairo_status_t (0 on success) or -1 if an error occured.
frame
A frame represents a frame or iframe. Due to same origin policy it is not possible to inject scripts from
a webview into iframes with a different domain. For this purpose the frame object can be used.
frame.domain (String, read)
The domain name of the frame which is the effective second level domain
frame.host (String, read)
The host name of the frame
Boolean frame.inject(String script, [Boolean global])
Injects a script into a frame, see also webview.inject for details.
download
Corresponds to a WebKitDownload.
new Download(String uri)
Constructs a new download
uri
The uri of the download
Boolean download.start([Function callback])
Starts a download
callback
A callback function that will be executed whenever the DownloadStatus changes, return true to
stop the emission, optional.
void download.cancel()
Cancels a download
historylist
Corresponds to a WebkitWebBackForwardList.
historylist.backLength
Number of items that precede the current item
historylist.forwardLength
Number of items that succeed the current item
WebKitWebHistoryItem historylist.getItem([Number position])
Gets a WebKitWebHistoryItem.
position
The position of the item where 0 corresponds to the current item.
returns
A WebKitWebHistoryItem.
GTK WIDGETS
It is possible to create new widgets but only widgets that are currently used by dwb can be created, the
widgets used by dwb can be found under http://portix.bitbucket.org/dwb/resources/layout.html.
Constructor
new GtkWindow(String type)
Constructs a new widget
type
The type of the widget, e.g. "GtkLabel"
Methods
All created widgets implement the following methods:
void GtkWidget.destroy()
Destroys a widget. Note that only newly created widgets can be destroyed.
Widgets that implement the GtkBox interface implement the following methods:
void GtkWidget.packEnd(GtkWidget child, boolean expand, boolean fill, int padding)
Adds a widget to a GtkBox.
child
The child widget
expand
Whether to expand the widget
fill
Whether to fill the remaining space
padding
Padding in the box
void GtkWidget.packStart(GtkWidget child, boolean expand, boolean fill, int padding)
Adds a widget to a GtkBox.
child
The child widget
expand
Whether to expand the widget
fill
Whether to fill the remaining space
padding
Padding in the box
void GtkWidget.reorderChild(GtkWidget child, int postion)
Moves a widget to a new position.
child
The child widget
position
The new position
Widgets derived from GtkContainer implement the following methods:
void GtkWidget.add(GtkWidget child)
Adds a widget to a GtkContainer.
child
The child widget
Example
var label = new GtkWidget("GtkLabel");
gui.statusBox.packStart(label, false, false, 0);
label.label = "foobar";
label.visible = true;
SIGNALS
Execute code on certain events. dwb emits some signals, e.g. before a new site is loaded, the signals
object can be used to handle these signals. All events are emitted on the signals object itself, for
example "signals.keyPress = function() { ... };" would connect to the keyPress signal but it is strongly
discouraged to use this pattern since it will only allow to connect one callback to a certain signal. To
handle signals Signal-objects can be used, it manages signals, allows one to to connect to more than one
signal and also allows one to to easily disconnect/reconnect to signals.
There is just one convenient pattern that allows one to setting callbacks directly on signals: if the
signal name starts with "on" dwb will internally create a new Signal and connect to it with the given
callback function, i.e. using signals.onResource = function () {...} allows one to to connect more than
one callback to the "resource"-event, however it doesn’t give you as much control as creating a Signal.
When connected with this pattern it is not possible to disconnect from the signal with signals.onResource
= null;, instead Signal.disconnect must be used.
Emitted signals
Custom signals can be created by simply calling
var signal = new Signal("nameOfNewSignal", callbackFunction);
Signals emitted by dwb are the following:
buttonPress
new Signal("buttonPress", function(webview, hittestresult, event));
Emitted when a button is pressed on the webview, return true to prevent the default action
webview
The webview which received the signal
hittestresult
Hittestresult under the cursor
event.button
The button that is pressed, usually a value between 1 and 5
event.state
A bitmap of modifiers pressed, see Modifier
event.time
The time in milliseconds when the button was pressed
event.type
A ClickType
event.x
x-position relative to the window
event.xRoot
x-position relative to the screen
event.y
y-position relative to the window
event.yRoot
y-position relative to the screen
buttonRelease
new Signal("buttonRelease", function(webview, hittestresult, event));
Emitted when a button is released, return true to prevent the default action
webview
The webview which received the signal
hittestresult
Hittestresult under the cursor
event
Same as buttonPress but without event.type
changeMode
new Signal("changeMode", function(webview, mode));
Emitted when the mode changes, return true to prevent the change.
webview
The focused webview
mode
A mode, see also Modes for possible modes
close
new Signal("close", function());
Emitted when dwb is closed
closeTab
new Signal("closeTab", function(webview));
Emitted when a tab is closed
webview
The webview that corresponds to the tab
createTab
new Signal("createTab", function(webview));
Emitted when a tab is created
webview
The webview that corresponds to the created tab
documentLoaded
new Signal("documentLoaded", function(webview, frame));
Emitted when a the DOM document of a frame has been loaded.
webview
The webview that emitted the signal
frame
The frame that contains the document
download
new Signal("download", function(webview, download, json));
Emitted before a download starts, before a file or action has been chosen, return true if the signal
was handled.
webview
The webview that emitted the signal
download
The Download
json.referer
The referer
json.mimeType
The mimetype of the file
downloadStart
new Signal("downloadStart", function(download, json));
Emitted before a download starts after a path or application has been chosen, return true if the
signal was handled. Note that destinationUri has not been set on the download.
download
The Download
json.referer
The referer
json.mimeType
The mimetype of the file
json.destinationUri
The chosen destination path or null if an application was chosen.
json.application
The chosen application or null if a path was chosen.
downloadStatus
new Signal("downloadStatus", function(download));
Emitted when the DownloadStatus changes.
download
The Download
executeCommand
new Signal("executeCommand", function(commandinfo));
Emitted when a command is executed, return true to prevent execution.
commandinfo.command
The command that is executed
commandinfo.argument
An argument, if the command isn’t executed from commandline this will always be null.
commandinfo.nummod
The numerical modifier.
frameCreated
new Signal("frameCreated", function(webview, frame));
Emitted when a frame is created
webview
The webview the frame belongs to
frame
The frame
frameStatus
new Signal("frameStatus", function(webview, frame));
Emitted when the LoadStatus of a frame changes
webview
The webview the frame belongs to
frame
The frame
keyPress
new Signal("keyPress", function(webview, json));
Emitted when a key is pressed, return true to prevent the default action
webview
The focused webview
json.isModifier
Whether or not the key is a modifier
json.keyCode
Hardware keycode
json.keyVal
Keycode as listed in gdkkeysyms.h
json.name
A string represantation of the key
json.state
A bitmap of modifiers pressed, see Modifier
keyRelease
new Signal("keyRelease", function(webview, json));
Emitted when a key is released, return true to prevent the default action
webview
The focused webview
json
Same as keyPress
loadCommitted
new Signal("loadCommitted", function(webview));
Emitted when the load has just committed, no data has been loaded when this signal is emitted. This
is the preferred signal for injected scripts that do not manipulate the DOM.
webview
The webview that emitted the signal
loadFinished
new Signal("loadFinished", function(webview));
Emitted when the site has completely loaded.
webview
The webview that emitted the signal
loadStatus
new Signal("loadStatus", function(webview));
Emitted when the load status changes
webview
The webview that emitted the signal
mimeType
new Signal("mimeType", function(webview, frame, request, json));
Decide whether or not to show a given mimetype. Return true to stop the request.
webview
The webview that emitted the signal
frame
The frames requires the decision
request
The network request
json.mimeType
The mimetype
mouseMove
new Signal("mouseMove", function(webview, event));
Emitted when the pointer is moved.
webview
The webview that emitted the signal
event
Same as buttonRelease
navigation
new Signal("navigation", function(webview, frame, request, action));
Emitted before a new site is loaded, return true to stop the request.
webview
The webview that emitted the signal
frame
The frame that requires the navigation
request
The network request
action
The navigation action
resource
new Signal("resource", function(webview, frame, request, response));
Emitted before a new resource is going to be loaded
webview
The webview that emitted the signal
frame
The frame that dispatched the request
request
The network request
response
The network response
statusBarChange
new Signal("statusBarChange", function(webview, data));
Emitted before the status bar is updated, if the callback returns true dwb will not update the
statusbar so it is possible to set the statusbar from the script.
webview
The focused webview
data.canGoBack
Whether it is possible to navigate back in the webview
data.canGoForward
Whether it is possible to navigate forward in the webview
data.isBookmarked
Whether the site is bookmarked
data.isQuickmarked
Whether the site is quickmarked
data.pluginsBlocked
Whether plugins are blocked
data.scriptsBlocked
Whether scripts are blocked
data.ssl
SSL-State of the page, can either be trusted, untrusted or none
data.type
The type of the update, can be status and uri, status means that statusLabel und uriLabel need to
be updated, uri means that only the uriLabel needs to be updated.
tabButtonPress
new Signal("tabButtonPress", function(webview, tabwidget, event));
Emitted when a button is pressed on a tabwidget, return true to prevent the default action
webview
The webview which received the signal
tabwidget
The tabwidget
event
Same as buttonPress
tabFocus
new Signal("tabFocus", function(webview, json));
Emitted when another tab gets focus, return true to stop the event
webview
The new tab
json.last
The number of the previously focused tab
SIGNAL
Object that can be used to connect to certain browser events.
Constructor
new Signal(String name, [Function callback])
Constructs a new signal
name
Name of the event
callback
Callback function that is invoked when the signal is emitted.
Properties
callback (Function, read|write)
The callback that will be called when the signal is emitted, the context of the signal will be the
signal itself (i.e. this refers to the connected Signal).
connected (Boolean, read)
Whether the signal is connected
id (Number, read)
Unique id of the signal
name (Number, read)
Name of the event
Methods
connect([Function callback])
Connects the signal to the event
callback
Callback function that is invoked when the signal is emitted, optional but mandatory if no
callback was given during signal construction.
returns
self
disconnect([Function callback])
Disconnects the signal from the event
returns
self
toggle()
Toggles a signal, if it is connected it will be disconnected an vice versa.
returns
true if the signal was connected, false otherwise
Static methods
Signal.connect(String name, Function callback)
Connects to an event
signals
The event name
callback
Callback function to connect to.
Signal.connectAll(Array signals, [Function callback])
Connects to more than one signal at once
signals
Array of signals.
callback
Callback function to connect to, optional.
Signal.connectWebView(String name, Function callback)
Connects all webviews to a GObject signal.
name
The event name
callback
A callback function the will be called when the signal is emitted, the arguments of the callback
correspond to the GObject callback with the first argument omitted, instead this refers to the
object.
Signal.disconnect(Signal|Function object)
Either a Signal or the callback of a signal If a callback is passed to this function and the same
callback is connected multiple times only the first matching callback will be disconnected, to
disconnect all matching callbacks call use Signal.disconnectAll
object
The event name
returns
the disconnected signal
Signal.disconnectAll(Function callback)
Disconnect from all signals with matching callback function
callback
A callback function
returns
An array of signal that were disconnected
Signal.emit(String name, ...)
Emits a signal, can be used to implement custom signals.
name
The name of the event
...
Variable number of arguments passed to the callback function of Signal.connect.
returns
The overall return value of all callback function, if one callback function returns true the
overall return value will be true
ENUM OBJECTS
Enum objects are objects that have only readonly properties, mapping gtk/webkit enums to javascript
objects.
ButtonContext
const ButtonContext = {
document : 1 << 1,
link : 1 << 2,
image : 1 << 3,
media : 1 << 4,
selection : 1 << 5,
editable : 1 << 6
};
ChecksumType
const ChecksumType = {
md5 : 0,
sha1 : 1,
sha256 : 2
};
ClickType
const ClickType = {
click : 4,
doubleClick : 5,
tripleClick : 6
};
DownloadStatus
const DownloadStatus = {
error : -1,
created : 0,
started : 1,
cancelled : 2,
finished : 3
};
FileTest
const FileTest = {
regular : 1 << 0,
symlink : 1 << 1,
dir : 1 << 2,
executable : 1 << 3,
exists : 1 << 4
};
LoadStatus
const LoadStatus = {
provisional : 0,
committed : 1,
finished : 2,
firstVisualLayout : 3,
failed : 4
};
Modifier
const Modifier = {
Shift : 1 << 0,
Lock : 1 << 1,
Control : 1 << 2,
Mod1 : 1 << 3,
Mod2 : 1 << 4,
Mod3 : 1 << 5,
Mod4 : 1 << 6,
Mod5 : 1 << 7,
Button1 : 1 << 8,
Button2 : 1 << 9,
Button3 : 1 << 10,
Button4 : 1 << 11,
Button5 : 1 << 12,
Super : 1 << 26,
Hyper : 1 << 27,
Meta : 1 << 28,
Release : 1 << 30,
Modifier : 0x5c001fff
};
NavigationReason
const NavigationReason = {
linkClicked : 0,
formSubmitted : 1,
backForward : 2,
reload : 3,
formResubmitted : 4,
other : 5
};
Modes
const Modes = {
NormalMode : 1<<0,
InsertMode : 1<<1,
CommandMode : 1<<2
HintMode : 1<<2
};
Selection
const Selection = {
primary : 1,
clipboard : 2
};
GLOBAL DATA
Since all scripts share the same execution context, they are encapsulated in a function. To avoid
conflicts with other scripts it is not allowed to set properties on the global object, i.e.
#!javascript
// not allowed, the global object is readonly
number = 0;
io.print(number); // undefined
var number2 = 0;
io.print(number2); // 0
// not allowed
foo = function()
{
io.print("foo");
}
foo(); // fails
For sharing data between scripts either signals or modules can be created.
script and this
In every script the variable script refers to this, the encapsulating function, it has the following
properties and methods:
script.path (Object, read)
The path of the script.
script._arguments (Object, read)
arguments object of the encapsulating function
void script.debug(Object params)
Same as io.debug but also prints additional information, e.g. if the object is an Error, this method
will also print the corresponding source of the error.
String script.generateId()
Generates a unique id.
returns
A unique id.
void script.getPrivate(Object object, String key)
Gets a private property of an object previously set with script.setPrivate
object
The object on which the value was set.
key
The property name
returns
The private value
void script.setPrivate(Object object, String key, String value)
Convenience function to set a private property on an object that doesn’t conflict with properties set
in other scripts, it uses a random unique id to set the property, so the property can most likely be
only retrieved with script.getPrivate. This is mostly useful for objects derived from GObject since
GObjects are shared between all scripts.
object
The object on which the value should be set.
key
The property name
value
The value to set.
MODULES
With modules it is possible to share objects between scripts. Modules are defined with provide and loaded
with require.
Defining modules.
#!javascript
provide("myModule", {
foo : 37,
doBar : function() {
io.print("bar");
}
});
provide("myOtherModule", {
act : function (arg) {
io.print(arg);
}
});
Getting some modules.
#!javascript
require(["myModule", "myOtherModule"], function(myModule, myOtherModule) {
if (myModule.foo == 37)
myModule.doBar();
myOtherModule.act("foo");
});
Getting all modules.
#!javascript
require(null, function(modules) {
if (modules.myModule.foo == 37)
modules.myModule.doBar();
modules.myOtherModule.act("foo");
});
It is also possible to specify a path in the name array. The name then follows the format name!path:
#!javascript
require(["foo!/path/to/foo"], function(foo) {
io.print(foo.bar); // 37
});
/path/to/foo.
provide("foo", { bar : 37 });
The resolution chain is as follows, first all modules defined with provide and module names requested by
require are stored. If all scripts have been loaded the requirements are resolved. If a requirement
contains a path and the module isn’t defined yet the module will be loaded, if it is already defined the
path is ignored and the stored module will be resolved:
#!javascript
require(["foo!/path/to/foo"], function(foo) {
io.print(foo.bar); // 42
});
provide("foo", { bar : 42 });
#!javascript
require(["foo"], function(foo) {
io.print(foo); // undefined
});
require(["foo!/path/to/foo"]);
require(["foo"], function(foo) {
io.print(foo); // { bar : 37 }
});
EXTENSIONS
dwb provides the possibility to load extensions. It is recommended to implement javascript-userscripts as
an extension to have consistent configuration locations for scripts. One advantage of extension also is
that they can be loaded/unloaded on the fly.
Prepackaged extensions
formfiller
An extension that gets form data and fills forms with previously saved data.
Configuration options
formData
A path to a file where formdata will be saved, the default path is $XDG_CONFIG_HOME/dwb/forms
scGetForm
Shortcut that gets and saves form data, the default value is efg
scFillForm
Shortcut that fills a form, the default value is eff
useGPG
Whether to use gpg2 to encrypt the formData file with a password.
GPGOptEncrypt
Additional options that will be passed to gpg2 for encryption, the default gpg2 options are:
--passphrase <password> --batch --no-tty --yes -c --output <formData> default value: ""
GPGOptDecrypt
Additional options that will be passed to gpg2 for decryption, the default gpg2 options are
--passphrase <password> --batch --no-tty --yes -d <formData> default value: ""
keepPassword
Whether to save the gpg password in memory, if set to false the user will be prompted for the
password every time a form is filled or new data is saved, default value: true
keepFormdata
If useGPG is enabled and this value is set to true the complete formdata will be kept in
memory, if set to false gpg2 will be called every time a form is filled, default value: false
perdomainsettings
An extension that can be used for per-domain-settings. Valid settings are the properties of
WebKitWebSettings but in camelcase, see
http://webkitgtk.org/reference/webkitgtk/unstable/WebKitWebSettings.html for details.
Configuration options
domains
Settings applied based on the effective second level domain
hosts
Settings applied based on host name, this option is an object of the format
uris
Settings applied based on the uri, this option is an object of the format
defaults
Default settings, for each setting in domains, hosts and uris a default-value should be
specified
Example configuration
Example using extensions.load:
extensions.load("perdomainsettings", {
domains : {
"example.com" : {
"enablePlugins" : true
},
"example.uk.com" : {
"enablePlugins" : true,
"enableScripts" : false
}
},
hosts : {
"www.example1.com" : {
"autoLoadImages" : true
}
},
uris : {
"http://www.example2.com/login.php" : {
"autoLoadImages" : false
}
},
defaults : {
"enablePlugins" : false,
"autoLoadImages" : false,
"enableScripts" : true
}
});
requestpolicy
Extension that blocks requests from thirdparty domains with whitelisting support, either permanently
or just for the session. It is also possible to block requests from certain domains on all sites,
they have highest precedence and will also be blocked on sites where thirdparty requests are allowed
in general.
Configuration options
shortcut
Shortcut to block / allow requests, default "erp"
unblockCurrent
Shortcut to unblock always blocked requests, shows only domains from the current site,
default "erC"
unblockAll
Shortcut to unblock always blocked requests, shows all blocked domains, default "erA"
whiteList
A path to the whitelisting file, default is $XDG_CONFIG_HOME/dwb/<profile>/requestpolicy.json
autoreload
Whether to automatically reload the website after the persistentList has changed, default
false
notify
Whether to notify about blocked request, default false
unique_tabs
Extension that allows one to to remove duplicate tabs or avoids duplicate tabs automatically.
Configuration options
shortcutRemoveDuplicates
Shortcut that removes duplicate tabs, default null
commandRemoveDuplicates
Command that remove s duplicate tabs, default ut_remove_duplicates
autoFocus
Autofocus a tab if an url is already opened, if the url would be loaded in a new tab the new
tab is closed. Setting this to true makes commandRemoveDuplicates and
shortcutRemoveDuplicates obsolete because there will be no duplicate tabs. Default value:
true
shortcutToggleAutoFocus
Shortcut that enables/disables autofocus, default null
commandToggleAutoFocus
Command that enables/disables autofocus, default ut_toggle_autofocus
userscripts
Extension that loads userscripts and injects them into websites, this extension is mostly
greasemonkey compatible. Scripts can be loaded by either passing an array of paths to extensions.load
or by putting scripts into $XDG_CONFIG_HOME/dwb/scripts/.
Configuration options
The only configuration option is an array of paths to scripts
Example configuration
Example using extensions.load:
extensions.load("userscripts", [ "/path/to/script1", "/path/to/script2" ]);
Using extensions
Extensions can be loaded by an userscript
#!javascript
extensions.load("extension_1");
extensions.load("extension_2", {
configProp_1 : 22,
configProp_2 : "val2"
});
To load/unload extensions on the fly extensions.bind can be used:
#!javascript
var myConfig = {
prop_1 : 37,
prop_2 : true,
prop_3 : "foo"
};
extensions.bind("myExtension", "Control m", {
command : "toggleMyExtension",
config : myConfig,
load : false
});
extensions.bind("mySecondExtension", "Control M");
The default searchpaths for extensions are $XDG_DATA_HOME/dwb/extensions/ and /usr/share/dwb/extensions/.
Methods
void extensions.bind(String name, String shortcut, [Object options])
Bind an extension to a shortcut, the shortcut enables/disables the extension.
name
Name of the extension
shortcut
Name of the extension
options
An optional object with options where possible options are
options.load
Whether to load the extension on startup, default true
options.config
Config passed to extensions.load
options.command
Command that can be used on command line
void extensions.disableAll()
Disables all extensions.
void extensions.error(String name, String message)
Print a consistent error message to stderr
name
Name of the extension
message
The message
Boolean extensions.load(String name, [Object config])
Loads an extension
name
Name of the extension
config
The config for the script, if omitted the config is read from $XDG_CONFIG_HOME/dwb/extensionrc,
optional
returns
True if the extension was loaded
Boolean extensions.toggle(String name, [Object config])
Toggles an extension
name
Name of the extension
config
The config for the extension. optional
returns
True if the extension was loaded, false if it was unloaded.
Boolean extensions.unload(String name)
Unloads an extension
name
Name of the extension
returns
True if the extension was unloaded
void extensions.error(String name, String message|Error e, [String message])
Print an error message and call stack to stderr.
name
Name of the extension
message|e
The error message or an Error
message
If the second parameter is an Error, an optional message can be specified.
void extensions.message(String name, String message)
Print a consistent message to stdout
name
Name of the extension
message
The message
void extensions.warning(String name, String message)
Print a consistent warning to stderr
name
Name of the extension
message
The warning message
Writing extensions
The default searchpath for extensions is $XDG_DATA_HOME/dwb/extensions and SHARE_DIR/dwb/extensions where
SHARE_DIR being the share directory of the installation, most likely /usr/share.
The configuration for extensions is in $XDG_CONFIG_HOME/dwb/extensionrc and should return a javascript
object.
Every extension must implement one function named init that takes one argument, the config for the
extension. The function should return true if the extension was successfully loaded, false otherwise.
Every extension also may implement a function end that will be called when an extension is unloaded. If
an extension registers to signals and binds shortcuts the extension should unregister all signals and
unbind all shortcuts in this function. init and end should be returned from the extension.
Additionally the returned object can also have a defaultConfig-property and an exports-property.
defaultConfig will be mixed into the config before calling the init function and exports can be used to
define a public api that can be loaded as a module with require.
Example
A extension called foobar in $HOME/.local/share/dwb/extensions/foobar:
function foo(val) {
....
}
function bar(val) {
....
}
function loadStatusCallback(w) {
...
}
var myExtension = {
defaultConfig : { foo : 37 },
exports : {
foo : foo,
bar : bar
},
init : function (config) {
if (config.foo > 36) {
bar(config.foo);
foo(config.bar);
bind("XX", bar, "dobar");
Signal.connect("loadStatus", loadStatusCallback);
return true;
}
return false;
},
end : function () {
unbind("dobar");
Signal.disconnect(loadStatusCallback);
return true;
}
};
return myExtension;
Example extensionrc
return {
foobar : { bar : "X", foo : 37 }, // config for extension foobar
barfoo : { } // config for extension barfoo
};
SEE ALSO
dwb(1) dwbem(1)
04/04/2013 DWB-JS(7)