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/** |
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* Photonic Justified Grid Layout (JS-based) |
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* Photonic can render a justified grid using CSS or JS. The CSS layout is the default. The JS one is used when the sizes of the images are not available upfront. |
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* The CSS layout renders quicker, but the JS layouts are a lot prettier. |
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* |
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* License: GPL v3.0 |
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*/ |
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|
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import {Core} from "../Core.js"; |
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import * as Util from "../Util.js"; |
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|
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const linearMin = arr => { |
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let computed, result, x, _i, _len; |
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for (_i = 0, _len = arr.length; _i < _len; _i++) { |
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x = arr[_i]; |
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computed = x[0]; |
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if (!result || computed < result.computed) { |
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result = { |
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value: x, |
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computed: computed |
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}; |
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} |
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} |
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return result.value; |
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}; |
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|
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const linearPartition = (seq, k) => { |
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let ans, i, j, m, n, solution, table, x, y, _i, _j, _k, _l; |
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n = seq.length; |
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if (k <= 0) { |
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return []; |
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} |
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if (k > n) { |
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return seq.map(x => [x]); |
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} |
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table = (() => { |
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let _i, _results; |
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_results = []; |
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for (y = _i = 0; 0 <= n ? _i < n : _i > n; y = 0 <= n ? ++_i : --_i) { |
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_results.push((function() { |
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let _j, _results1; |
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_results1 = []; |
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for (x = _j = 0; 0 <= k ? _j < k : _j > k; x = 0 <= k ? ++_j : --_j) { |
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_results1.push(0); |
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} |
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return _results1; |
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})()); |
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} |
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return _results; |
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})(); |
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solution = (() => { |
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let _i, _ref, _results; |
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_results = []; |
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for (y = _i = 0, _ref = n - 1; 0 <= _ref ? _i < _ref : _i > _ref; y = 0 <= _ref ? ++_i : --_i) { |
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_results.push((function() { |
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let _j, _ref1, _results1; |
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_results1 = []; |
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for (x = _j = 0, _ref1 = k - 1; 0 <= _ref1 ? _j < _ref1 : _j > _ref1; x = 0 <= _ref1 ? ++_j : --_j) { |
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_results1.push(0); |
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} |
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return _results1; |
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})()); |
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} |
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return _results; |
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})(); |
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|
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for (i = _i = 0; 0 <= n ? _i < n : _i > n; i = 0 <= n ? ++_i : --_i) { |
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table[i][0] = seq[i] + (i ? table[i - 1][0] : 0); |
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} |
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for (j = _j = 0; 0 <= k ? _j < k : _j > k; j = 0 <= k ? ++_j : --_j) { |
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table[0][j] = seq[0]; |
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} |
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for (i = _k = 1; 1 <= n ? _k < n : _k > n; i = 1 <= n ? ++_k : --_k) { |
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for (j = _l = 1; 1 <= k ? _l < k : _l > k; j = 1 <= k ? ++_l : --_l) { |
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m = linearMin((() => { |
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let _m, _results; |
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_results = []; |
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for (x = _m = 0; 0 <= i ? _m < i : _m > i; x = 0 <= i ? ++_m : --_m) { |
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_results.push([Math.max(table[x][j - 1], table[i][0] - table[x][0]), x]); |
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} |
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return _results; |
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})()); |
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table[i][j] = m[0]; |
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solution[i - 1][j - 1] = m[1]; |
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} |
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} |
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n = n - 1; |
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k = k - 2; |
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ans = []; |
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while (k >= 0) { |
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ans = [ |
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(() => { |
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let _m, _ref, _ref1, _results; |
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_results = []; |
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for (i = _m = _ref = solution[n - 1][k] + 1, _ref1 = n + 1; _ref <= _ref1 ? _m < _ref1 : _m > _ref1; i = _ref <= _ref1 ? ++_m : --_m) { |
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_results.push(seq[i]); |
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} |
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return _results; |
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})() |
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].concat(ans); |
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n = solution[n - 1][k]; |
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k = k - 1; |
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} |
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return [ |
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(() => { |
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let _m, _ref, _results; |
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_results = []; |
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for (i = _m = 0, _ref = n + 1; 0 <= _ref ? _m < _ref : _m > _ref; i = 0 <= _ref ? ++_m : --_m) { |
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_results.push(seq[i]); |
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} |
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return _results; |
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})() |
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].concat(ans); |
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}; |
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|
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function part(seq, k) { |
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if (k <= 0) { |
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return []; |
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} |
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while (k) { |
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try { |
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return linearPartition(seq, k--); |
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} |
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catch (_error) { |
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// |
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} |
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} |
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} |
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|
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export const JustifiedGrid = (resized, jsLoaded, selector, lightbox) => { |
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if (console !== undefined && Photonic_JS.debug_on !== '0' && Photonic_JS.debug_on !== '') console.time('Justified Grid'); |
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let selection = document.querySelectorAll(selector); |
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|
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if (selector == null || selection.length === 0) { |
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selection = document.querySelectorAll('.photonic-random-layout'); |
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} |
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|
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if (!resized && selection.length > 0) { |
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Core.showSpinner(); |
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} |
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|
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const setupTitles = () => { |
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Core.blankSlideupTitle(); |
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Core.showSlideupTitle(); |
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if (!resized && !jsLoaded) { |
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Core.hideLoading(); |
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} |
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}; |
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|
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selection.forEach((container) => { |
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// If there are some nodes for which the sizes are missing, play safe and run this in JS mode. |
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// Otherwise render the gallery using CSS, and just display the images once they have downloaded. |
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if (container.classList.contains('sizes-missing') || !window.CSS || !CSS.supports('color', 'var(--fake-var)')) { |
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const viewportWidth = Math.floor(container.getBoundingClientRect().width), |
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windowHeight = Math.max(document.documentElement.clientHeight, window.innerHeight || 0), |
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idealHeight = Math.max(parseInt(windowHeight / 4), Photonic_JS.tile_min_height); |
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|
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const gap = Photonic_JS.tile_spacing * 2; |
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|
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Core.waitForImages(container).then(() => { |
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const photos = [], |
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images = Array.from(container.getElementsByTagName('img')); |
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|
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images.forEach(image => { |
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if (image.closest('.photonic-panel') !== null) { |
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return; |
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} |
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|
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const div = image.parentNode.parentNode; |
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|
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if (!(image.naturalHeight === 0 || image.naturalHeight === undefined || image.naturalWidth === undefined)) { |
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photos.push({tile: div, aspect_ratio: (image.naturalWidth) / (image.naturalHeight)}); |
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} |
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}); |
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|
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const summedWidth = photos.reduce(((sum, p) => sum += p.aspect_ratio * idealHeight + gap), 0); |
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|
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const rows = Math.max(Math.round(summedWidth / viewportWidth), 1), // At least 1 row should be shown |
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weights = photos.map(p => Math.round(p.aspect_ratio * 100)); |
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|
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const partition = part(weights, rows); |
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let index = 0; |
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|
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const oLen = partition.length; |
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for (let o = 0; o < oLen; o++) { |
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const onePart = partition[o]; |
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let summedRatios; |
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const rowBuffer = photos.slice(index, index + onePart.length); |
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index = index + onePart.length; |
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|
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summedRatios = rowBuffer.reduce(((sum, p) => sum += p.aspect_ratio), 0); |
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|
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const rLen = rowBuffer.length; |
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for (let r = 0; r < rLen; r++) { |
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const item = rowBuffer[r], |
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existing = item.tile; |
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existing.style.width = parseInt(viewportWidth / summedRatios * item.aspect_ratio)+"px"; |
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existing.style.height = parseInt(viewportWidth / summedRatios)+"px"; |
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} |
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} |
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|
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container.querySelectorAll('.photonic-thumb, .photonic-thumb img').forEach((thumb) => Util.fadeIn(thumb)); |
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setupTitles(); |
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}); |
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} |
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else { |
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Core.watchForImages(container); |
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setupTitles(); |
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} |
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|
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if (lightbox && !resized) { |
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if (Photonic_JS.lightbox_library === 'lightcase') { |
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lightbox.initialize('.photonic-random-layout'); |
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} |
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else if (['bigpicture', 'featherlight', 'glightbox'].indexOf(Photonic_JS.lightbox_library) > -1) { |
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lightbox.initialize(container); |
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} |
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else if (Photonic_JS.lightbox_library === 'fancybox3') { |
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lightbox.initialize('.photonic-random-layout'); |
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} |
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else if (Photonic_JS.lightbox_library === 'photoswipe') { |
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lightbox.initialize(); |
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} |
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} |
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}); |
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if (console !== undefined && Photonic_JS.debug_on !== '0' && Photonic_JS.debug_on !== '') console.timeEnd('Justified Grid'); |
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}; |
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|
