diff options
Diffstat (limited to 'app/assets/javascripts/pager.js')
-rw-r--r-- | app/assets/javascripts/pager.js | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/app/assets/javascripts/pager.js b/app/assets/javascripts/pager.js new file mode 100644 index 00000000000..5f6bc902cf8 --- /dev/null +++ b/app/assets/javascripts/pager.js @@ -0,0 +1,77 @@ +require('~/lib/utils/common_utils'); +require('~/lib/utils/url_utility'); + +(() => { + const ENDLESS_SCROLL_BOTTOM_PX = 400; + const ENDLESS_SCROLL_FIRE_DELAY_MS = 1000; + + const Pager = { + init(limit = 0, preload = false, disable = false, callback = $.noop) { + this.url = $('.content_list').data('href') || gl.utils.removeParams(['limit', 'offset']); + this.limit = limit; + this.offset = parseInt(gl.utils.getParameterByName('offset'), 10) || this.limit; + this.disable = disable; + this.callback = callback; + this.loading = $('.loading').first(); + if (preload) { + this.offset = 0; + this.getOld(); + } + this.initLoadMore(); + }, + + getOld() { + this.loading.show(); + $.ajax({ + type: 'GET', + url: this.url, + data: `limit=${this.limit}&offset=${this.offset}`, + dataType: 'json', + error: () => this.loading.hide(), + success: (data) => { + this.append(data.count, data.html); + this.callback(); + + // keep loading until we've filled the viewport height + if (!this.disable && !this.isScrollable()) { + this.getOld(); + } else { + this.loading.hide(); + } + }, + }); + }, + + append(count, html) { + $('.content_list').append(html); + if (count > 0) { + this.offset += count; + } else { + this.disable = true; + } + }, + + isScrollable() { + const $w = $(window); + return $(document).height() > $w.height() + $w.scrollTop() + ENDLESS_SCROLL_BOTTOM_PX; + }, + + initLoadMore() { + $(document).unbind('scroll'); + $(document).endlessScroll({ + bottomPixels: ENDLESS_SCROLL_BOTTOM_PX, + fireDelay: ENDLESS_SCROLL_FIRE_DELAY_MS, + fireOnce: true, + ceaseFire: () => this.disable === true, + callback: () => { + if (!this.loading.is(':visible')) { + this.loading.show(); + this.getOld(); + } + }, + }); + }, + }; + + window.Pager = Pager; +})(); |