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assets/webapps/email.gaiamobile.org/js/form_navigation.js

@@ -0,0 +1,71 @@
+define(['require'], function (require) {
+    function FormNavigation(options) {
+        function extend(destination, source) {
+            for (var property in source) {
+                destination[property] = source[property];
+            }
+            return destination;
+        }
+        if (!options.formElem) {
+            throw new Error('The form element should be defined.');
+        }
+        var self = this;
+        this.options = extend({
+            formElem: null,
+            checkFormValidity: function checkFormValidity() {
+                return self.options.formElem.checkValidity();
+            },
+            onLast: function () {
+            }
+        }, options);
+        this.options.formElem.addEventListener('keypress', this.onKeyPress.bind(this));
+        this.options.formElem.addEventListener('click', this.onClick.bind(this));
+    }
+    FormNavigation.prototype = {
+        onKeyPress: function formNav_onKeyPress(event) {
+            if (event.keyCode === 13) {
+                var nextInput = this.focusNextInput(event);
+                if (!nextInput && this.options.checkFormValidity()) {
+                    this.options.onLast(event);
+                }
+            }
+        },
+        onClick: function formNav_onClick(event) {
+            if (event.target.type === 'reset') {
+                var formValidity = this.options.checkFormValidity();
+                var buttonElems = this.options.formElem.getElementsByTagName('button');
+                for (var i = 0; i < buttonElems.length; i++) {
+                    var button = buttonElems[i];
+                    if (button.type !== 'reset') {
+                        button.disabled = !formValidity;
+                    }
+                }
+            }
+        },
+        focusNextInput: function formNav_focusNextInput(event) {
+            var currentInput = event.target;
+            var inputElems = this.options.formElem.getElementsByTagName('input');
+            var currentInputFound = false;
+            for (var i = 0; i < inputElems.length; i++) {
+                var input = inputElems[i];
+                if (currentInput === input) {
+                    currentInputFound = true;
+                    continue;
+                } else if (!currentInputFound) {
+                    continue;
+                }
+                if (input.type === 'hidden' || input.type === 'button') {
+                    continue;
+                }
+                input.focus();
+                if (document.activeElement !== input) {
+                    continue;
+                }
+                return input;
+            }
+            currentInput.blur();
+            return null;
+        }
+    };
+    return FormNavigation;
+});