From caa0c45a1141cf448c1cbc479d6ccf469b6a39df Mon Sep 17 00:00:00 2001
From: barisusakli <barisusakli@gmail.com>
Date: Fri, 25 Apr 2014 16:34:34 -0400
Subject: [PATCH] closes #1441

---
 public/src/modules/topicSelect.js | 57 ++++++++++++++++++++++++++++---
 1 file changed, 52 insertions(+), 5 deletions(-)

diff --git a/public/src/modules/topicSelect.js b/public/src/modules/topicSelect.js
index 4fbbc38f12..a5b131a7a2 100644
--- a/public/src/modules/topicSelect.js
+++ b/public/src/modules/topicSelect.js
@@ -4,21 +4,38 @@
 
 define(function() {
 	var TopicSelect = {};
+	var lastSelected;
 
 	TopicSelect.init = function(onSelect) {
-		$('#topics-container').on('click', '.select', function() {
+
+		$('#topics-container').on('selectstart', function() {
+			return false;
+		});
+
+		$('#topics-container').on('click', '.select', function(ev) {
 			var select = $(this);
-			var isChecked = !select.hasClass('fa-square-o');
 
-			select.toggleClass('fa-check-square-o', !isChecked);
-			select.toggleClass('fa-square-o', isChecked);
-			select.parents('.category-item').toggleClass('selected', !isChecked);
+			if (ev.shiftKey) {
+				selectRange($(this).parents('.category-item').attr('data-tid'));
+				lastSelected = select;
+				return false;
+			}
+
+			var isSelected = select.hasClass('fa-check-square-o');
+			toggleSelect(select, !isSelected);
+			lastSelected = select;
 			if (typeof onSelect === 'function') {
 				onSelect();
 			}
 		});
 	};
 
+	function toggleSelect(select, isSelected) {
+		select.toggleClass('fa-check-square-o', isSelected);
+		select.toggleClass('fa-square-o', !isSelected);
+		select.parents('.category-item').toggleClass('selected', isSelected);
+	}
+
 	TopicSelect.getSelectedTids = function() {
 		var tids = [];
 		$('#topics-container .category-item.selected').each(function() {
@@ -32,5 +49,35 @@ define(function() {
 		$('#topics-container .select').toggleClass('fa-check-square-o', false).toggleClass('fa-square-o', true);
 	};
 
+	function selectRange(clickedTid) {
+
+		if(!lastSelected) {
+			lastSelected = $('.category-item[data-tid]').first().find('.select');
+		}
+
+		var isClickedSelected = $('.category-item[data-tid="' + clickedTid + '"]').hasClass('selected');
+
+		var clickedIndex = getIndex(clickedTid);
+		var lastIndex = getIndex(lastSelected.parents('.category-item[data-tid]').attr('data-tid'));
+		selectIndexRange(clickedIndex, lastIndex, !isClickedSelected);
+	}
+
+	function selectIndexRange(start, end, isSelected) {
+		if (start > end) {
+			var tmp = start;
+			start = end;
+			end = tmp;
+		}
+
+		for(var i=start; i<=end; ++i) {
+			var topic = $('.category-item[data-tid]').eq(i);
+			toggleSelect(topic.find('.select'), isSelected);
+		}
+	}
+
+	function getIndex(tid) {
+		return $('.category-item[data-tid="' + tid + '"]').index('.category-item');
+	}
+
 	return TopicSelect;
 });
\ No newline at end of file