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/* eslint-disable class-methods-use-this */
require('./lib/utils/url_utility');
(() => {
const UNFOLD_COUNT = 20;
let isBound = false;
class Diff {
constructor() {
const $diffFile = $('.files .diff-file');
$diffFile.singleFileDiff();
$diffFile.filesCommentButton();
$diffFile.each((index, file) => new gl.ImageFile(file));
if (this.diffViewType() === 'parallel') {
$('.content-wrapper .container-fluid').removeClass('container-limited');
}
if (!isBound) {
$(document)
.on('click', '.js-unfold', this.handleClickUnfold.bind(this))
.on('click', '.diff-line-num a', this.handleClickLineNum.bind(this));
isBound = true;
}
if (gl.utils.getLocationHash()) {
this.highlightSelectedLine();
}
this.openAnchoredDiff();
}
handleClickUnfold(e) {
const $target = $(e.target);
// current babel config relies on iterators implementation, so we cannot simply do:
// const [oldLineNumber, newLineNumber] = this.lineNumbers($target.parent());
const ref = this.lineNumbers($target.parent());
const oldLineNumber = ref[0];
const newLineNumber = ref[1];
const offset = newLineNumber - oldLineNumber;
const bottom = $target.hasClass('js-unfold-bottom');
let since;
let to;
let unfold = true;
if (bottom) {
const lineNumber = newLineNumber + 1;
since = lineNumber;
to = lineNumber + UNFOLD_COUNT;
} else {
const lineNumber = newLineNumber - 1;
since = lineNumber - UNFOLD_COUNT;
to = lineNumber;
// make sure we aren't loading more than we need
const prevNewLine = this.lineNumbers($target.parent().prev())[1];
if (since <= prevNewLine + 1) {
since = prevNewLine + 1;
unfold = false;
}
}
const file = $target.parents('.diff-file');
const link = file.data('blob-diff-path');
const view = file.data('view');
const params = { since, to, bottom, offset, unfold, view };
$.get(link, params, response => $target.parent().replaceWith(response));
}
openAnchoredDiff(cb) {
const locationHash = gl.utils.getLocationHash();
const anchoredDiff = locationHash && locationHash.split('_')[0];
if (!anchoredDiff) return;
const diffTitle = $(`#${anchoredDiff}`);
const diffFile = diffTitle.closest('.diff-file');
const nothingHereBlock = $('.nothing-here-block:visible', diffFile);
if (nothingHereBlock.length) {
const clickTarget = $('.js-file-title, .click-to-expand', diffFile);
diffFile.data('singleFileDiff').toggleDiff(clickTarget, () => {
this.highlightSelectedLine();
if (cb) cb();
});
} else if (cb) {
cb();
}
}
handleClickLineNum(e) {
const hash = $(e.currentTarget).attr('href');
e.preventDefault();
if (window.history.pushState) {
window.history.pushState(null, null, hash);
} else {
window.location.hash = hash;
}
this.highlightSelectedLine();
}
diffViewType() {
return $('.inline-parallel-buttons a.active').data('view-type');
}
lineNumbers(line) {
if (!line.children().length) {
return [0, 0];
}
return line.find('.diff-line-num').map((i, elm) => parseInt($(elm).data('linenumber'), 10));
}
highlightSelectedLine() {
const hash = gl.utils.getLocationHash();
const $diffFiles = $('.diff-file');
$diffFiles.find('.hll').removeClass('hll');
if (hash) {
$diffFiles
.find(`tr#${hash}:not(.match) td, td#${hash}, td[data-line-code="${hash}"]`)
.addClass('hll');
}
}
}
window.gl = window.gl || {};
window.gl.Diff = Diff;
})();
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