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Key Scrolling + Carousel Option #363

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Key Scrolling + Carousel Option #363

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29 changes: 27 additions & 2 deletions bootstrap3-typeahead.js
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Original file line number Diff line number Diff line change
Expand Up @@ -406,7 +406,11 @@
var next = active.next();

if (!next.length) {
next = $(this.$menu.find($(this.options.item || this.theme.item).prop('tagName'))[0]);
if (this.options.carousel) {
next = $(this.$menu.find($(this.options.item || this.theme.item).prop('tagName'))[0]);
} else {
next = active; // stop at end of list
}
}

while (next.hasClass('divider') || next.hasClass('dropdown-header')) {
Expand All @@ -419,14 +423,26 @@
if (this.changeInputOnMove) {
this.$element.val(this.displayText(newVal) || newVal);
}

// added to scroll parent container
var offset_in_list = next.offset().top - next.closest('ul').offset().top;
var item_height = next.outerHeight();

if (offset_in_list > next.closest('ul').height()) {
next.closest('ul').scrollTop(next.closest('ul').scrollTop() + item_height);
}
},

prev: function (event) {
var active = this.$menu.find('.active').removeClass('active');
var prev = active.prev();

if (!prev.length) {
prev = this.$menu.find($(this.options.item || this.theme.item).prop('tagName')).last();
if (this.options.carousel) {
prev = this.$menu.find($(this.options.item || this.theme.item).prop('tagName')).last();
} else {
prev = active; // stop at start of list
}
}

while (prev.hasClass('divider') || prev.hasClass('dropdown-header')) {
Expand All @@ -439,6 +455,14 @@
if (this.changeInputOnMove) {
this.$element.val(this.displayText(newVal) || newVal);
}

// added to scroll parent container
var offset_in_list = prev.offset().top - prev.closest('ul').offset().top;
var item_height = prev.outerHeight();

if (offset_in_list < 0) {
prev.closest('ul').scrollTop(prev.closest('ul').scrollTop() - item_height);
}
},

listen: function () {
Expand Down Expand Up @@ -716,6 +740,7 @@
Typeahead.defaults = {
source: [],
items: 8,
carousel: true,
minLength: 1,
scrollHeight: 0,
autoSelect: true,
Expand Down