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Support for sorting numbers #3

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173 changes: 88 additions & 85 deletions knockout.bindings.orderable.js
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Original file line number Diff line number Diff line change
@@ -1,86 +1,89 @@
ko.bindingHandlers.orderable = {
compare: function (left, right) {
if (typeof left === 'string' || typeof right === 'string') {
return left.localeCompare(right);
}
if (left > right)
return 1;

return left < right ? -1 : 0;
},

sort: function (viewModel, collection, field) {
//make sure we sort only once and not for every binding set on table header
if (viewModel[collection].orderField() == field) {
viewModel[collection].sort(function (left, right) {
var left_val = (typeof left[field] === 'function') ? left[field]() : left[field];
right_val = (typeof right[field] === 'function') ? right[field]() : right[field];
if (viewModel[collection].orderDirection() == "desc") {
return ko.bindingHandlers.orderable.compare(right_val, left_val);
} else {
return ko.bindingHandlers.orderable.compare(left_val, right_val);
}
});
}
},

init: function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
//get provided options
var collection = valueAccessor().collection;
var field = valueAccessor().field;

//add a few observables to ViewModel to track order field and direction
if (viewModel[collection].orderField == undefined) {
viewModel[collection].orderField = ko.observable();
}
if (viewModel[collection].orderDirection == undefined) {
viewModel[collection].orderDirection = ko.observable("asc");
}

//set order observables on table header click
$(element).click(function (e) {
e.preventDefault();

//flip sort direction if current sort field is clicked again
if (viewModel[collection].orderField() == field) {
if (viewModel[collection].orderDirection() == "asc") {
viewModel[collection].orderDirection("desc");
} else {
viewModel[collection].orderDirection("asc");
}
}

viewModel[collection].orderField(field);
});

//order records when observables changes, so ordering can be changed programmatically
viewModel[collection].orderField.subscribe(function () {
ko.bindingHandlers.orderable.sort(viewModel, collection, field);
});
viewModel[collection].orderDirection.subscribe(function () {
ko.bindingHandlers.orderable.sort(viewModel, collection, field);
});
},

update: function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
//get provided options
var collection = valueAccessor().collection;
var field = valueAccessor().field;
var isOrderedByThisField = viewModel[collection].orderField() == field;

//apply css binding programmatically
ko.bindingHandlers.css.update(
element,
function () {
return {
sorted: isOrderedByThisField,
asc: isOrderedByThisField && viewModel[collection].orderDirection() == "asc",
desc: isOrderedByThisField && viewModel[collection].orderDirection() == "desc"
};
},
allBindingsAccessor,
viewModel,
bindingContext
);
}
ko.bindingHandlers.orderable = {
compare: function (left, right) {
if (typeof left === 'string' || typeof right === 'string') {
return left.localeCompare(right);
}
else{ //for sorting numbers
return Number(left) - Number(right);
}
if (left > right)
return 1;

return left < right ? -1 : 0;
},

sort: function (viewModel, collection, field) {
//make sure we sort only once and not for every binding set on table header
if (viewModel[collection].orderField() == field) {
viewModel[collection].sort(function (left, right) {
var left_val = (typeof left[field] === 'function') ? left[field]() : left[field];
right_val = (typeof right[field] === 'function') ? right[field]() : right[field];
if (viewModel[collection].orderDirection() == "desc") {
return ko.bindingHandlers.orderable.compare(right_val, left_val);
} else {
return ko.bindingHandlers.orderable.compare(left_val, right_val);
}
});
}
},

init: function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
//get provided options
var collection = valueAccessor().collection;
var field = valueAccessor().field;

//add a few observables to ViewModel to track order field and direction
if (viewModel[collection].orderField == undefined) {
viewModel[collection].orderField = ko.observable();
}
if (viewModel[collection].orderDirection == undefined) {
viewModel[collection].orderDirection = ko.observable("asc");
}

//set order observables on table header click
$(element).click(function (e) {
e.preventDefault();

//flip sort direction if current sort field is clicked again
if (viewModel[collection].orderField() == field) {
if (viewModel[collection].orderDirection() == "asc") {
viewModel[collection].orderDirection("desc");
} else {
viewModel[collection].orderDirection("asc");
}
}

viewModel[collection].orderField(field);
});

//order records when observables changes, so ordering can be changed programmatically
viewModel[collection].orderField.subscribe(function () {
ko.bindingHandlers.orderable.sort(viewModel, collection, field);
});
viewModel[collection].orderDirection.subscribe(function () {
ko.bindingHandlers.orderable.sort(viewModel, collection, field);
});
},

update: function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
//get provided options
var collection = valueAccessor().collection;
var field = valueAccessor().field;
var isOrderedByThisField = viewModel[collection].orderField() == field;

//apply css binding programmatically
ko.bindingHandlers.css.update(
element,
function () {
return {
sorted: isOrderedByThisField,
asc: isOrderedByThisField && viewModel[collection].orderDirection() == "asc",
desc: isOrderedByThisField && viewModel[collection].orderDirection() == "desc"
};
},
allBindingsAccessor,
viewModel,
bindingContext
);
}
};