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modify pager widget to handle boundary conditions; now takes a Dataset instead of a Query so that it has access to the record count; add tests

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This commit is contained in:
kielni 2014-01-17 13:07:41 -08:00
parent 45fa438803
commit 8c1a1359db
5 changed files with 120 additions and 11 deletions
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2
demos/search/demo.search.app.js
View File

@ -143,7 +143,7 @@ var SearchView = Backbone.View.extend({
this.el.find('.sidebar').append(view.el);
var pager = new recline.View.Pager({
model: this.model.queryState
model: this.model
});
this.el.find('.pager-here').append(pager.el);

2
src/view.multiview.js
View File

@ -260,7 +260,7 @@ my.MultiView = Backbone.View.extend({
}, this);
this.pager = new recline.View.Pager({
model: this.model.queryState
model: this.model
});
this.$el.find('.recline-results-info').after(this.pager.el);

27
src/widget.pager.js
View File

@ -25,34 +25,43 @@ my.Pager = Backbone.View.extend({
initialize: function() {
_.bindAll(this, 'render');
this.listenTo(this.model, 'change', this.render);
this.listenTo(this.model.queryState, 'change', this.render);
this.render();
},
onFormSubmit: function(e) {
e.preventDefault();
var newFrom = parseInt(this.$el.find('input[name="from"]').val());
newFrom = Math.min(this.model.recordCount, Math.max(newFrom, 1))-1;
var newSize = parseInt(this.$el.find('input[name="to"]').val()) - newFrom;
newFrom = Math.max(newFrom, 0);
newSize = Math.max(newSize, 1);
this.model.set({size: newSize, from: newFrom});
newSize = Math.min(Math.max(newSize, 1), this.model.recordCount);
this.model.queryState.set({size: newSize, from: newFrom});
},
onPaginationUpdate: function(e) {
e.preventDefault();
var $el = $(e.target);
var newFrom = 0;
var currFrom = this.model.queryState.get('from');
var size = this.model.queryState.get('size');
var updateQuery = false;
if ($el.parent().hasClass('prev')) {
newFrom = this.model.get('from') - Math.max(0, this.model.get('size'));
newFrom = Math.max(currFrom - Math.max(0, size), 1)-1;
updateQuery = newFrom != currFrom;
} else {
newFrom = this.model.get('from') + this.model.get('size');
newFrom = Math.max(currFrom + size, 1);
updateQuery = (newFrom < this.model.recordCount);
}
if (updateQuery) {
this.model.queryState.set({from: newFrom});
}
newFrom = Math.max(newFrom, 0);
this.model.set({from: newFrom});
},
render: function() {
var tmplData = this.model.toJSON();
tmplData.to = this.model.get('from') + this.model.get('size');
var from = parseInt(this.model.queryState.get('from'));
tmplData.from = from+1;
tmplData.to = Math.min(from+this.model.queryState.get('size'), this.model.recordCount);
var templated = Mustache.render(this.template, tmplData);
this.$el.html(templated);
return this;
}
});

1
test/index.html
View File

@ -71,6 +71,7 @@
<script type="text/javascript" src="util.test.js"></script>
<script type="text/javascript" src="widget.filtereditor.test.js"></script>
<script type="text/javascript" src="widget.valuefilter.test.js"></script>
<script type="text/javascript" src="widget.pager.test.js"></script>
</head>
<body>
<h1 id="qunit-header">Qunit Tests</h1>

99
test/widget.pager.test.js Normal file
View File

@ -0,0 +1,99 @@
module("Widget - Pager");
test('basics', function () {
var dataset = Fixture.getDataset();
var size = dataset.recordCount/2 + 1;
dataset.queryState.set({ size : size }, { silent : true });
var view = new recline.View.Pager({
model: dataset
});
$('.fixtures').append(view.el);
var fromSelector = 'input[name=from]';
var toSelector = 'input[name=to]';
assertPresent('.pagination', view.elSidebar);
// next and prev present
assertPresent('.prev', view.elSidebar);
assertPresent('.next', view.elSidebar);
// from and to inputs present
assertPresent(fromSelector, view.elSidebar);
assertPresent(toSelector, view.elSidebar);
// click next: -> reload from+size - recordCount
var prevFromVal = parseInt($(fromSelector).val());
var prevToVal = parseInt($(toSelector).val());
view.$el.find('.next a').click();
equal($(fromSelector).val(), prevFromVal+size);
// to = recordCount since size is more than half of record count
equal($(toSelector).val(), dataset.recordCount);
// UI is 1-based but model is zero-based
equal(dataset.queryState.get('from'), prevFromVal+size-1);
// click prev -> 1-4, model from=0
prevFromVal = parseInt($(fromSelector).val());
prevToVal = parseInt($(toSelector).val());
view.$el.find('.prev a').click();
equal($(fromSelector).val(), prevFromVal-size);
equal($(toSelector).val(), prevFromVal-1);
// UI is 1-based but model is zero-based
equal(dataset.queryState.get('from'), prevFromVal-size-1);
view.remove();
});
test('bounds checking', function () {
var dataset = Fixture.getDataset();
var size = dataset.recordCount/2 + 1;
dataset.queryState.set({ size : size }, { silent : true });
var view = new recline.View.Pager({
model: dataset
});
$('.fixtures').append(view.el);
var querySpy = sinon.spy(dataset, 'query');
var fromSelector = 'input[name=from]';
var toSelector = 'input[name=to]';
// click prev on beginning: nothing happens
view.$el.find('.prev a').click();
equal($(fromSelector).val(), 1);
equal($(toSelector).val(), size);
ok(!dataset.query.called);
// enter size-1 in from: reloads size-1 - size
var fromVal = size-1;
var toVal = parseInt($(toSelector).val());
$(fromSelector).val(fromVal).change();
equal($(fromSelector).val(), fromVal);
equal($(toSelector).val(), toVal);
// UI is 1-based but model is zero-based
equal(dataset.queryState.get('from'), fromVal-1);
// enter value past the end in from: reloads recordCount - recordCount
fromVal = dataset.recordCount + 10;
$(fromSelector).val(fromVal).change();
equal($(fromSelector).val(), dataset.recordCount);
equal($(toSelector).val(), dataset.recordCount);
// UI is 1-based but model is zero-based
equal(dataset.queryState.get('from'), dataset.recordCount-1);
// click next on end -> nothing happens
var queryCalls = querySpy.callCount;
fromVal = parseInt($(fromSelector).val());
toVal = parseInt($(toSelector).val());
view.$el.find('.next a').click();
equal(querySpy.callCount, queryCalls);
equal($(fromSelector).val(), fromVal);
equal($(toSelector).val(), toVal);
// reset from to 1
// type value past the end in to: 1-recordCount
fromVal = 1;
toVal = dataset.recordCount + 10;
$(fromSelector).val(fromVal);
$(toSelector).val(toVal).change();
equal($(fromSelector).val(), 1);
equal($(toSelector).val(), dataset.recordCount);
view.remove();
});