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keep track of query in view when scrolling
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@Lazy-poet
Lazy-poet committed Nov 7, 2022
1 parent 9a0546e commit 6debd01
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Showing 3 changed files with 103 additions and 23 deletions.
6 changes: 5 additions & 1 deletion public/js/report.js
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Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,7 @@ class Report extends Component {
querydb: [],
params: [],
stats: [],
allQueriesLoaded: false
};
}
/**
Expand Down Expand Up @@ -290,7 +291,9 @@ class Report extends Component {
* Called after all results have been rendered.
*/
componentFinishedUpdating() {
if (this.state.allQueriesLoaded) return;
this.shouldShowIndex() && this.setupScrollSpy();
this.setState({ allQueriesLoaded: true });
}

/**
Expand Down Expand Up @@ -322,12 +325,13 @@ class Report extends Component {
*/
resultsJSX() {
return (
<div className="row">
<div className="row" id="results">
<div className="col-md-3 hidden-sm hidden-xs">
<Sidebar
data={this.state}
atLeastOneHit={this.atLeastOneHit()}
shouldShowIndex={this.shouldShowIndex()}
allQueriesLoaded={this.state.allQueriesLoaded}
/>
</div>
<div className="col-md-9">
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116 changes: 96 additions & 20 deletions public/js/sidebar.js
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Original file line number Diff line number Diff line change
Expand Up @@ -21,25 +21,106 @@ export default class extends Component {
this.indexJSX = this.indexJSX.bind(this);
this.downloadsPanelJSX = this.downloadsPanelJSX.bind(this);
this.handleQueryIndexChange = this.handleQueryIndexChange.bind(this);
this.isElementInViewPort = this.isElementInViewPort.bind(this);
this.setVisibleQueryIndex = this.setVisibleQueryIndex.bind(this);
this.debounceScrolling = this.debounceScrolling.bind(this);
this.scrollListener = this.scrollListener.bind(this);
this.copyURL = this.copyURL.bind(this);
this.mailtoLink = this.mailtoLink.bind(this);
this.sharingPanelJSX = this.sharingPanelJSX.bind(this);
this.timeout = null;
this.queryElems = [];
this.state = {
queryIndex: 0
queryIndex: 1
};
}

componentDidMount() {
/**
* Fixes tooltips in the sidebar, allows tooltip display on click
*/
$(function () {
$('.sidebar [data-toggle="tooltip"]').tooltip({ placement: 'right' });
$('#copyURL').tooltip({ title: 'Copied!', trigger: 'click', placement: 'right', delay: 0 });
});

//keep track of the current queryIndex so it doesn't get lost on page reload
const urlMatch = window.location.href.match(/#Query_(\d+)/);
if (urlMatch && urlMatch.length > 1) {
const queryNumber = +urlMatch[1];
const index = this.props.data.queries.findIndex(query => query.number === queryNumber);
this.setState({ queryIndex: Math.max(0, index) });
this.setState({ queryIndex: index + 1 });
}
this.copyURL = this.copyURL.bind(this);
this.mailtoLink = this.mailtoLink.bind(this);
this.sharingPanelJSX = this.sharingPanelJSX.bind(this);
window.addEventListener('scroll', this.scrollListener);
$('a[href^="#Query_"]').on('click', this.animateAnchorElements);
}
componentWillUnmount() {
window.removeEventListener('scroll', this.scrollListener);
}
componentDidUpdate(prevProps) {
if (this.props.allQueriesLoaded && !prevProps.allQueriesLoaded) {
/**
* storing all query elements in this variable once they all become available so we don't have to fetch them all over again
*/
this.queryElems = Array.from(document.querySelectorAll('.resultn'));
}
}


/**
* to avoid unnecessary computations, we debounce the scroll listener so it only fires after user has stopped scrolling for some milliseconds
*/
scrollListener() {
this.debounceScrolling(this.setVisibleQueryIndex, 500);
}

debounceScrolling(callback, timer) {
if (this.timeout) {
clearTimeout(this.timeout);
}
this.timeout = setTimeout(callback, timer);
}

/**
* This method makes the page aware of what query is visible so that clicking previous / next button at any point
* navigates to the proper query
*/
setVisibleQueryIndex() {
const queryElems = this.queryElems.length ? this.queryElems : Array.from(document.querySelectorAll('.resultn'));
// get the first visible element and marks it as the current query
const topmostEl = queryElems.find(this.isElementInViewPort);
if (topmostEl) {
const queryIndex = Number(topmostEl.id.match(/Query_(\d+)/)[1]);
let hash = `#Query_${queryIndex}`;
// if we can guarantee that the browser can handle change in url hash without the page jumping,
// then we update the url hash after scroll. else, hash is only updated on click of next or prev button
if (window.history.pushState) {
window.history.pushState(null, null, hash);
}
this.setState({ queryIndex });
}
}
animateAnchorElements(e) {
e.preventDefault();
$('html, body').animate({
scrollTop: $(this.hash).offset().top
}, 300);
if (window.history.pushState) {
window.history.pushState(null, null, this.hash);
} else {
window.location.hash = this.hash;
}

}
isElementInViewPort(elem) {
const { top, left, right, bottom } = elem.getBoundingClientRect();
return (
top >= 0 &&
left >= 0 &&
bottom <= (window.innerHeight || document.documentElement.clientHeight) &&
right <= (window.innerWidth || document.documentElement.clientWidth)
);
}
/**
* Clear sessionStorage - useful to initiate a new search in the same tab.
* Passing sessionStorage.clear directly as onclick callback didn't work
Expand All @@ -53,11 +134,14 @@ export default class extends Component {
* handle next and previous query button clicks
*/
handleQueryIndexChange(nextQuery) {
if (nextQuery < 0 || nextQuery > this.props.data.queries.length - 1) return;
if (nextQuery < 1 || nextQuery > this.props.data.queries.length) return;
const anchorEl = document.createElement('a');
anchorEl.setAttribute('href', '#Query_' + this.props.data.queries[nextQuery].number);
//indexing at [nextQuery - 1] because array is 0-indexed
anchorEl.setAttribute('href', '#Query_' + this.props.data.queries[nextQuery - 1].number);
anchorEl.setAttribute('hidden', true);
document.body.appendChild(anchorEl);
// add smooth scrolling animation with jquery
$(anchorEl).on('click', this.animateAnchorElements);
anchorEl.click();
document.body.removeChild(anchorEl);
this.setState({ queryIndex: nextQuery });
Expand Down Expand Up @@ -132,15 +216,7 @@ export default class extends Component {
return false;
}

/**
* Fixes tooltips in the sidebar, allows tooltip display on click
*/
componentDidMount() {
$(function () {
$('.sidebar [data-toggle="tooltip"]').tooltip({ placement: 'right' });
$('#copyURL').tooltip({ title: 'Copied!', trigger: 'click', placement: 'right', delay: 0 });
});
}


/**
* Handles copying the URL into the user's clipboard. Modified from: https://stackoverflow.com/a/49618964/18117380
Expand Down Expand Up @@ -240,10 +316,10 @@ export default class extends Component {
const buttonStyle = {
outline: 'none', border: 'none', background: 'none'
};
return <div style={{ display: 'flex', width: '100%', }}>
<button className="btn-link nowrap-ellipsis hover-bold" disabled={this.state.queryIndex === 0} style={buttonStyle} onClick={() => this.handleQueryIndexChange(this.state.queryIndex - 1)}>Previous query</button>
<span className="line">|</span>
<button className="btn-link nowrap-ellipsis hover-bold" disabled={this.state.queryIndex === this.props.data.queries.length - 1} style={buttonStyle} onClick={() => this.handleQueryIndexChange(this.state.queryIndex + 1)}>Next query</button>
return <div style={{ display: 'flex', width: '100%', margin: '7px 0' }}>
<button className="btn-link nowrap-ellipsis hover-bold" hidden={this.state.queryIndex === 1} style={buttonStyle} onClick={() => this.handleQueryIndexChange(this.state.queryIndex - 1)}>Previous query</button>
<span className="line" hidden={this.state.queryIndex === 1 || this.state.queryIndex === this.props.data.queries.length}>|</span>
<button className="btn-link nowrap-ellipsis hover-bold" hidden={this.state.queryIndex === this.props.data.queries.length} style={buttonStyle} onClick={() => this.handleQueryIndexChange(this.state.queryIndex + 1)}>Next query</button>
</div>;
}
indexJSX() {
Expand Down
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