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var $, KeyHandler,
bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
$ = jQuery;
KeyHandler = (function() {
var DOWN, LEFT, RIGHT, UP;
LEFT = 37;
UP = 38;
RIGHT = 39;
DOWN = 40;
function KeyHandler(tree_widget) {
this.selectNode = bind(this.selectNode, this);
this.tree_widget = tree_widget;
if (tree_widget.options.keyboardSupport) {
$(document).bind('keydown.jqtree', $.proxy(this.handleKeyDown, this));
}
}
KeyHandler.prototype.deinit = function() {
return $(document).unbind('keydown.jqtree');
};
KeyHandler.prototype.moveDown = function() {
var node;
node = this.tree_widget.getSelectedNode();
if (node) {
return this.selectNode(node.getNextNode());
} else {
return false;
}
};
KeyHandler.prototype.moveUp = function() {
var node;
node = this.tree_widget.getSelectedNode();
if (node) {
return this.selectNode(node.getPreviousNode());
} else {
return false;
}
};
KeyHandler.prototype.moveRight = function() {
var node;
node = this.tree_widget.getSelectedNode();
if (!node) {
return true;
} else if (!node.isFolder()) {
return true;
} else {
if (node.is_open) {
return this.selectNode(node.getNextNode());
} else {
this.tree_widget.openNode(node);
return false;
}
}
};
KeyHandler.prototype.moveLeft = function() {
var node;
node = this.tree_widget.getSelectedNode();
if (!node) {
return true;
} else if (node.isFolder() && node.is_open) {
this.tree_widget.closeNode(node);
return false;
} else {
return this.selectNode(node.getParent());
}
};
KeyHandler.prototype.handleKeyDown = function(e) {
var key;
if (!this.tree_widget.options.keyboardSupport) {
return true;
}
if ($(document.activeElement).is('textarea,input,select')) {
return true;
}
if (!this.tree_widget.getSelectedNode()) {
return true;
}
key = e.which;
switch (key) {
case DOWN:
return this.moveDown();
case UP:
return this.moveUp();
case RIGHT:
return this.moveRight();
case LEFT:
return this.moveLeft();
}
return true;
};
KeyHandler.prototype.selectNode = function(node) {
if (!node) {
return true;
} else {
this.tree_widget.selectNode(node);
if (this.tree_widget.scroll_handler && (!this.tree_widget.scroll_handler.isScrolledIntoView($(node.element).find('.jqtree-element')))) {
this.tree_widget.scrollToNode(node);
}
return false;
}
};
return KeyHandler;
})();
module.exports = KeyHandler;
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