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302 lines (268 loc) · 8.14 KB
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/**
* Some of these scripts were taken from TinyMCE (http://tinymce.moxiecode.com/) and were modified for DokuWiki
*
* Class handles accesskeys using javascript and also provides ability
* to register and use other hotkeys as well.
*
* @author Marek Sacha <sachamar@fel.cvut.cz>
*/
function Hotkeys() {
this.shortcuts = new Array();
/**
* Set modifier keys, for instance:
* this.modifier = 'ctrl';
* this.modifier = 'ctrl+shift';
* this.modifier = 'ctrl+alt+shift';
* this.modifier = 'alt';
* this.modifier = 'alt+shift';
*
* overwritten in intitialize (see below)
*/
this.modifier = 'ctrl+alt';
/**
* Initialization
*
* This function looks up all the accesskeys used in the current page
* (at anchor elements and input elements [type="submit"]) and registers
* appropriate shortcuts.
*
* Secondly, initialization registers listeners on document to catch all
* keyboard events.
*
* @author Marek Sacha <sachamar@fel.cvut.cz>
*/
this.initialize = function() {
var t = this;
//switch modifier key based on OS FS#1958
if(is_macos){
t.modifier = 'ctrl+alt';
}else{
t.modifier = 'alt';
}
/**
* Lookup all anchors with accesskey and register event - go to anchor
* target.
*/
var anchors = document.getElementsByTagName("a");
t.each(anchors, function(a) {
if (a.accessKey != "") {
t.addShortcut(t.modifier + '+' + a.accessKey, function() {
location.href = a.href;
});
a.accessKey = '';
}
});
/**
* Lookup all input [type="submit"] with accesskey and register event -
* perform "click" on a button.
*/
var inputs = document.getElementsByTagName("input");
t.each(inputs, function(i) {
if (i.type == "submit" && i.accessKey != "") {
t.addShortcut(t.modifier + '+' + i.accessKey, function() {
i.click();
});
i.accessKey = '';
}
});
/**
* Lookup all buttons with accesskey and register event -
* perform "click" on a button.
*/
var buttons = document.getElementsByTagName("button");
t.each(buttons, function(b) {
if (b.accessKey != "") {
t.addShortcut(t.modifier + '+' + b.accessKey, function() {
b.click();
});
b.accessKey = '';
}
});
/**
* Register listeners on document to catch keyboard events.
*/
addEvent(document,'keyup',function (e) {
return t.onkeyup.call(t,e);
});
addEvent(document,'keypress',function (e) {
return t.onkeypress.call(t,e);
});
addEvent(document,'keydown',function (e) {
return t.onkeydown.call(t,e);
});
};
/**
* Keyup processing function
* Function returns true if keyboard event has registered handler, and
* executes the handler function.
*
* @param e KeyboardEvent
* @author Marek Sacha <sachamar@fel.cvut.cz>
* @return b boolean
*/
this. {
var t = this;
var v = t.findShortcut(e);
if (v != null && v != false) {
v.func.call(t);
return false;
}
return true;
};
/**
* Keydown processing function
* Function returns true if keyboard event has registered handler
*
* @param e KeyboardEvent
* @author Marek Sacha <sachamar@fel.cvut.cz>
* @return b boolean
*/
this. {
var t = this;
var v = t.findShortcut(e);
if (v != null && v != false) {
return false;
}
return true;
};
/**
* Keypress processing function
* Function returns true if keyboard event has registered handler
*
* @param e KeyboardEvent
* @author Marek Sacha <sachamar@fel.cvut.cz>
* @return b
*/
this. {
var t = this;
var v = t.findShortcut(e);
if (v != null && v != false) {
return false;
}
return true;
};
/**
* Register new shortcut
*
* This function registers new shortcuts, each shortcut is defined by its
* modifier keys and a key (with + as delimiter). If shortcut is pressed
* cmd_function is performed.
*
* For example:
* pa = "ctrl+alt+p";
* pa = "shift+alt+s";
*
* Full example of method usage:
* hotkeys.addShortcut('ctrl+s',function() {
* document.getElementByID('form_1').submit();
* });
*
* @param pa String description of the shortcut (ctrl+a, ctrl+shift+p, .. )
* @param cmd_func Function to be called if shortcut is pressed
* @author Marek Sacha <sachamar@fel.cvut.cz>
*/
this.addShortcut = function(pa, cmd_func) {
var t = this;
var o = {
func : cmd_func,
alt : false,
ctrl : false,
shift : false
};
t.each(t.explode(pa, '+'), function(v) {
switch (v) {
case 'alt':
case 'ctrl':
case 'shift':
o[v] = true;
break;
default:
o.charCode = v.charCodeAt(0);
o.keyCode = v.toUpperCase().charCodeAt(0);
}
});
t.shortcuts.push((o.ctrl ? 'ctrl' : '') + ',' + (o.alt ? 'alt' : '') + ',' + (o.shift ? 'shift' : '') + ',' + o.keyCode, o);
return true;
};
/**
* @property isMac
*/
this.isMac = is_macos;
/**
* Apply function cb on each element of o in the namespace of s
* @param o Array of objects
* @param cb Function to be called on each object
* @param s Namespace to be used during call of cb (default namespace is o)
* @author Marek Sacha <sachamar@fel.cvut.cz>
*/
this.each = function(o, cb, s) {
var n, l;
if (!o)
return 0;
s = s || o;
if (o.length !== undefined) {
// Indexed arrays, needed for Safari
for (n=0, l = o.length; n < l; n++) {
if (cb.call(s, o[n], n, o) === false)
return 0;
}
} else {
// Hashtables
for (n in o) {
if (o.hasOwnProperty(n)) {
if (cb.call(s, o[n], n, o) === false)
return 0;
}
}
}
return 1;
};
/**
* Explode string according to delimiter
* @param s String
* @param d Delimiter (default ',')
* @author Marek Sacha <sachamar@fel.cvut.cz>
* @return a Array of tokens
*/
this.explode = function(s, d) {
return s.split(d || ',');
};
/**
* Find if the shortcut was registered
*
* @param e KeyboardEvent
* @author Marek Sacha <sachamar@fel.cvut.cz>
* @return v Shortcut structure or null if not found
*/
this.findShortcut = function (e) {
var t = this;
var v = null;
/* No modifier key used - shortcut does not exist */
if (!e.altKey && !e.ctrlKey && !e.metaKey) {
return v;
}
t.each(t.shortcuts, function(o) {
if (o.ctrl != e.ctrlKey)
return;
if (o.alt != e.altKey)
return;
if (o.shift != e.shiftKey)
return;
if (e.keyCode == o.keyCode || (e.charCode && e.charCode == o.charCode)) {
v = o;
return;
}
});
return v;
};
}
/**
* Init function for hotkeys. Called from js.php, to ensure hotkyes are initialized after toolbar.
* Call of addInitEvent(initializeHotkeys) is unnecessary now.
*
* @author Marek Sacha <sachamar@fel.cvut.cz>
*/
function initializeHotkeys() {
var hotkeys = new Hotkeys();
hotkeys.initialize();
}