diff options
Diffstat (limited to 'js/shortcuts.js')
| -rw-r--r-- | js/shortcuts.js | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/js/shortcuts.js b/js/shortcuts.js new file mode 100644 index 0000000..0d8b804 --- /dev/null +++ b/js/shortcuts.js @@ -0,0 +1,223 @@ +/**
+ * http://www.openjs.com/scripts/events/keyboard_shortcuts/
+ * Version : 2.01.B
+ * By Binny V A
+ * License : BSD
+ */
+shortcut = {
+ 'all_shortcuts':{},//All the shortcuts are stored in this array
+ 'add': function(shortcut_combination,callback,opt) {
+ //Provide a set of default options
+ var default_options = {
+ 'type':'keydown',
+ 'propagate':false,
+ 'disable_in_input':false,
+ 'target':document,
+ 'keycode':false
+ }
+ if(!opt) opt = default_options;
+ else {
+ for(var dfo in default_options) {
+ if(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];
+ }
+ }
+
+ var ele = opt.target;
+ if(typeof opt.target == 'string') ele = document.getElementById(opt.target);
+ var ths = this;
+ shortcut_combination = shortcut_combination.toLowerCase();
+
+ //The function to be called at keypress
+ var func = function(e) {
+ e = e || window.event;
+
+ if(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields
+ var element;
+ if(e.target) element=e.target;
+ else if(e.srcElement) element=e.srcElement;
+ if(element.nodeType==3) element=element.parentNode;
+
+ if(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;
+ }
+
+ //Find Which key is pressed
+ if (e.keyCode) code = e.keyCode;
+ else if (e.which) code = e.which;
+ var character = String.fromCharCode(code).toLowerCase();
+
+ if(code == 188) character=","; //If the user presses , when the type is onkeydown
+ if(code == 190) character="."; //If the user presses , when the type is onkeydown
+
+ var keys = shortcut_combination.split("+");
+ //Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked
+ var kp = 0;
+
+ //Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken
+ var shift_nums = {
+ "`":"~",
+ "1":"!",
+ "2":"@",
+ "3":"#",
+ "4":"$",
+ "5":"%",
+ "6":"^",
+ "7":"&",
+ "8":"*",
+ "9":"(",
+ "0":")",
+ "-":"_",
+ "=":"+",
+ ";":":",
+ "'":"\"",
+ ",":"<",
+ ".":">",
+ "/":"?",
+ "\\":"|"
+ }
+ //Special Keys - and their codes
+ var special_keys = {
+ 'esc':27,
+ 'escape':27,
+ 'tab':9,
+ 'space':32,
+ 'return':13,
+ 'enter':13,
+ 'backspace':8,
+
+ 'scrolllock':145,
+ 'scroll_lock':145,
+ 'scroll':145,
+ 'capslock':20,
+ 'caps_lock':20,
+ 'caps':20,
+ 'numlock':144,
+ 'num_lock':144,
+ 'num':144,
+
+ 'pause':19,
+ 'break':19,
+
+ 'insert':45,
+ 'home':36,
+ 'delete':46,
+ 'end':35,
+
+ 'pageup':33,
+ 'page_up':33,
+ 'pu':33,
+
+ 'pagedown':34,
+ 'page_down':34,
+ 'pd':34,
+
+ 'left':37,
+ 'up':38,
+ 'right':39,
+ 'down':40,
+
+ 'f1':112,
+ 'f2':113,
+ 'f3':114,
+ 'f4':115,
+ 'f5':116,
+ 'f6':117,
+ 'f7':118,
+ 'f8':119,
+ 'f9':120,
+ 'f10':121,
+ 'f11':122,
+ 'f12':123
+ }
+
+ var modifiers = {
+ shift: { wanted:false, pressed:false},
+ ctrl : { wanted:false, pressed:false},
+ alt : { wanted:false, pressed:false},
+ meta : { wanted:false, pressed:false} //Meta is Mac specific
+ };
+
+ if(e.ctrlKey) modifiers.ctrl.pressed = true;
+ if(e.shiftKey) modifiers.shift.pressed = true;
+ if(e.altKey) modifiers.alt.pressed = true;
+ if(e.metaKey) modifiers.meta.pressed = true;
+
+ for(var i=0; k=keys[i],i<keys.length; i++) {
+ //Modifiers
+ if(k == 'ctrl' || k == 'control') {
+ kp++;
+ modifiers.ctrl.wanted = true;
+
+ } else if(k == 'shift') {
+ kp++;
+ modifiers.shift.wanted = true;
+
+ } else if(k == 'alt') {
+ kp++;
+ modifiers.alt.wanted = true;
+ } else if(k == 'meta') {
+ kp++;
+ modifiers.meta.wanted = true;
+ } else if(k.length > 1) { //If it is a special key
+ if(special_keys[k] == code) kp++;
+
+ } else if(opt['keycode']) {
+ if(opt['keycode'] == code) kp++;
+
+ } else { //The special keys did not match
+ if(character == k) kp++;
+ else {
+ if(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase
+ character = shift_nums[character];
+ if(character == k) kp++;
+ }
+ }
+ }
+ }
+
+ if(kp == keys.length &&
+ modifiers.ctrl.pressed == modifiers.ctrl.wanted &&
+ modifiers.shift.pressed == modifiers.shift.wanted &&
+ modifiers.alt.pressed == modifiers.alt.wanted &&
+ modifiers.meta.pressed == modifiers.meta.wanted) {
+ callback(e);
+
+ if(!opt['propagate']) { //Stop the event
+ //e.cancelBubble is supported by IE - this will kill the bubbling process.
+ e.cancelBubble = true;
+ e.returnValue = false;
+
+ //e.stopPropagation works in Firefox.
+ if (e.stopPropagation) {
+ e.stopPropagation();
+ e.preventDefault();
+ }
+ return false;
+ }
+ }
+ }
+ this.all_shortcuts[shortcut_combination] = {
+ 'callback':func,
+ 'target':ele,
+ 'event': opt['type']
+ };
+ //Attach the function with the event
+ if(ele.addEventListener) ele.addEventListener(opt['type'], func, false);
+ else if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);
+ else ele['on'+opt['type']] = func;
+ },
+
+ //Remove the shortcut - just specify the shortcut and I will remove the binding
+ 'remove':function(shortcut_combination) {
+ shortcut_combination = shortcut_combination.toLowerCase();
+ var binding = this.all_shortcuts[shortcut_combination];
+ delete(this.all_shortcuts[shortcut_combination])
+ if(!binding) return;
+ var type = binding['event'];
+ var ele = binding['target'];
+ var callback = binding['callback'];
+
+ if(ele.detachEvent) ele.detachEvent('on'+type, callback);
+ else if(ele.removeEventListener) ele.removeEventListener(type, callback, false);
+ else ele['on'+type] = false;
+ }
+}
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