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I am trying to write function which scrolls to a latter row in a table. The ui-grid has infinite scrolling through the rows.

I have found answers that explain scrolling to a last element, but my table has many hidden elements after an one scrolling and I need a solution to scroll through the full grid. (Protractor: Scrolling a table and testing for infinite scroll)

The solution: How to getText from all rows & columns in an infinite scrolling ng-grid using protractor - doesn't help me

My grid is:

<div class="ui-grid-viewport ng-isolate-scope" ng-style="colContainer.getViewportStyle()" role="rowgroup" ui-grid-viewport="" style="overflow-x: hidden; overflow-y: scroll;">
<div class="ui-grid-canvas">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index" style="margin-top: 630px;">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index" style="">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   <div class="ui-grid-row ng-scope" ng-style="Viewport.rowStyle(rowRenderIndex)" ng-repeat="(rowRenderIndex, row) in rowContainer.renderedRows track by $index">
   </div>
</div>

According to the case, there are 24 rows visible in DOM and 65 hidden.

My algorithm is "to scroll" while a scrolled distance between top element and "last" element won't be changed (and collect all necessary text), but the WHILE body does not work properly, it scrolls one time only:

this.tableContent = function tableContent() {      

    //for loop
    var start = {};
    var distance = {};
    var lastRow = {};     
    var div = element(by.css('div.ui-grid-viewport'));
    lastRow.elm = element.all(by.css('div.ui-grid-row')).last();

    browser.executeScript("return arguments[0].scrollTop;", lastRow.elm.getWebElement()).then(function (dst) {
        return distance.value = dst;       
    }).then(function () { 


        while (start.value !== distance.value) {
            //console.log('The distance before scrolling ' + dst);


            start.value = distance.value;

            //scroll
            browser.executeScript("arguments[0].scrollIntoView();", lastRow.elm.getWebElement());
            browser.wait(protractor.ExpectedConditions.presenceOf(element.all(by.css('div.ui-grid-row')).last()), 1000);

            lastRow.elm = element.all(by.css('div.ui-grid-row')).last();


            browser.executeScript("return arguments[0].scrollTop;", div.getWebElement()).then(function (dst) {

                //console.log('the distance after scroll is ' + dst)
                return distance.value = dst;

            }).then(function () {

                console.log('the distance is ' + distance.value);
                console.log('The start.value is ' + start.value);

            });


        }


    });

Any help or idea are highly appreciated,

thanks in advance.

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Nadin
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2 Answers2

1

OK, After a long research I have an answer. The problem is promises (as usually :)). Thanks for this article (While loop using bluebird promises), my solution that works for me is below:

     var promiseWhile = Promise.method(function (condition, action) {
        if (!condition()) return;
        return action().then(promiseWhile.bind(null, condition, action));
    });

    lastRow.elm = element.all(by.css('div.ui-grid-row')).last();


    browser.executeScript("return arguments[0].scrollTop;", lastRow.elm.getWebElement()).then(function (dst) {
        return distance.value = dst;

    })
    .then(function () {


        promiseWhile(function () {

            // Condition for stopping
            return start.value !== distance.value;

        }, function () {
                start.value = distance.value;

                return collectData().then(function () { 

                    //scroll
                    browser.executeScript("arguments[0].scrollIntoView();", lastRow.elm.getWebElement());
                    browser.wait(protractor.ExpectedConditions.presenceOf(element.all(by.css('div.ui-grid-row')).last()), 1000);

                    lastRow.elm = element.all(by.css('div.ui-grid-row')).last();
                    browser.executeScript("return arguments[0].scrollTop;", div.getWebElement()).then(function (dst) {
                        distance.value = dst;
                    });

                });

            });
        });




    var collectData = function collectData() { 

        // HERE COLLECT YOUR DATA and don't forget return result!
     }
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Nadin
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0

For instance you are looking for an element in a table:

var UIGridCanvasManipulations = function () { 

this.isTheElementPresent = function(elementName) {
    var start = { value: -1 };
    var distance = {};
    var lastRow = {};
    var flag = { value: false };

    var div = element(by.css('div.ui-grid-viewport'));



    var promiseFor = Promise.method(function (condition, action, value) {
        if (!condition(value)) return value;
        return action(value).then(promiseFor.bind(null, condition, action));
    });
   //SHOULD check if the table has data (or rows) and then look for an element. For that purpose the wait function is used sinde sometimes it take a time to load a table
    var res = browser.wait(protractor.ExpectedConditions.visibilityOf(element.all(by.css('div.ui-grid-row')).last())).then(function (present) {

        if (present) {


            lastRow.elm = element.all(by.css('div.ui-grid-row')).last();

            var result = browser.executeScript("return arguments[0].scrollTop;", lastRow.elm.getWebElement()).then(function (dst) {

                return distance.value = dst;

            }).then(function () {

                promiseFor(function (count) {
                    return (flag.value != true && start.value !== distance.value);
                }, function (count) {



                    return lookForElement()
                           .then(function (res) {
                        //scroll
                        browser.executeScript("arguments[0].scrollIntoView();", lastRow.elm.getWebElement());
                        browser.wait(protractor.ExpectedConditions.presenceOf(element.all(by.css('div.ui-grid-row')).last()));

                        lastRow.elm = element.all(by.css('div.ui-grid-row')).last();


                        browser.executeScript("return arguments[0].scrollTop;", div.getWebElement()).then(function (dst) {
                            distance.value = dst;
                        });


                        return start.value = distance.value;
                    })

                    return flag.value;

                }, 0)


            }).then(function () {

                return flag.value;

            });


            return result;

        } else {
            return false;
        }

    }, function (err) {

        return false;

    });

    return res;




    lookForElement: function {
    // HERE is YOUR CODE 
   };
 };

 };module.exports = UIGridCanvasManipulations;

Now, if you want to use it, do the following:

 var tableManipilation = require(UIGridCanvasManipulations);
 var tellMe= new tableManipilation();
 tellMe.isTheElementPresent(sElementTxt);

Hope it is clear :)

Nadin
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