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/* globals window, document */ |
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/** |
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* WPBC Slider Range Groups |
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* |
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* Universal, dependency-free controller that keeps a "range + number" pair in sync: |
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* - number input (data-wpbc_slider_range_value) |
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* - range slider (data-wpbc_slider_range_range) |
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* - writer input (data-wpbc_slider_range_writer) [optional] |
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* |
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* If writer exists: number/slider update writer and emit 'input' on writer (bubbles). |
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* If writer is missing: emits 'input' on the number input. |
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* If writer changes externally: updates number/slider. |
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* |
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* Markup expectations (minimal): |
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* <div class="wpbc_slider_range_group"> |
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* <input type="number" data-wpbc_slider_range_value> |
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* <input type="range" data-wpbc_slider_range_range> |
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* <!-- optional --> |
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* <input type="text" data-wpbc_slider_range_writer style="display:none;"> |
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* </div> |
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* |
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* Performance notes: |
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* - MutationObserver is DISABLED by default. |
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* - If your UI re-renders and inserts new groups dynamically, call: |
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* WPBC_Slider_Range_AutoInit(); OR instance.refresh(); |
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* Or enable observer via: new WPBC_Slider_Range_Groups(root, { enable_observer:true }).init(); |
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* |
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* Public API (instance methods): |
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* - init(), destroy(), refresh() |
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* |
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* @version 2026-01-25 |
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* @since 2026-01-25 |
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* @file ../includes/__js/admin/slider_groups/wpbc_range_groups.js |
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*/ |
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(function (w, d) { |
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'use strict'; |
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|
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// ------------------------------------------------------------------------------------------------- |
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// Helpers |
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// ------------------------------------------------------------------------------------------------- |
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function clamp_num(v, min, max) { |
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if (typeof min === 'number' && !isNaN(min)) v = Math.max(min, v); |
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if (typeof max === 'number' && !isNaN(max)) v = Math.min(max, v); |
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return v; |
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} |
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|
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function parse_float(v) { |
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var n = parseFloat(v); |
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return isNaN(n) ? null : n; |
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} |
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|
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function emit_input(el) { |
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if (!el) return; |
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el.dispatchEvent(new Event('input', { bubbles: true })); |
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} |
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|
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// ------------------------------------------------------------------------------------------------- |
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// Controller |
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// ------------------------------------------------------------------------------------------------- |
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class WPBC_Slider_Range_Groups { |
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|
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/** |
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* @param {HTMLElement|string} root_el Container (or selector). If omitted, uses document. |
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* @param {Object} [opts={}] |
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*/ |
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constructor(root_el, opts) { |
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this.root = root_el |
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? ((typeof root_el === 'string') ? d.querySelector(root_el) : root_el) |
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: d; |
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|
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this.opts = Object.assign({ |
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// Strict selectors (NO backward compatibility). |
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group_selector : '.wpbc_slider_range_group', |
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value_selector : '[data-wpbc_slider_range_value]', |
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range_selector : '[data-wpbc_slider_range_range]', |
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writer_selector : '[data-wpbc_slider_range_writer]', |
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|
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// Disabled by default for performance. |
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enable_observer : false, |
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observer_debounce_ms: 150 |
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}, opts || {}); |
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|
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this._on_input = this._on_input.bind(this); |
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this._on_change = this._on_change.bind(this); |
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|
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this._observer = null; |
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this._refresh_tmr = null; |
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} |
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|
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init() { |
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if (!this.root) return this; |
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|
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this.root.addEventListener('input', this._on_input, true); |
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this.root.addEventListener('change', this._on_change, true); |
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|
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if (this.opts.enable_observer && w.MutationObserver) { |
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this._observer = new MutationObserver(() => { this._debounced_refresh(); }); |
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this._observer.observe(this.root === d ? d.documentElement : this.root, { childList: true, subtree: true }); |
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} |
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|
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this.refresh(); |
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return this; |
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} |
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|
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destroy() { |
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if (!this.root) return; |
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|
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this.root.removeEventListener('input', this._on_input, true); |
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this.root.removeEventListener('change', this._on_change, true); |
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|
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if (this._observer) { |
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this._observer.disconnect(); |
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this._observer = null; |
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} |
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|
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if (this._refresh_tmr) { |
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clearTimeout(this._refresh_tmr); |
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this._refresh_tmr = null; |
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} |
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} |
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|
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refresh() { |
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if (!this.root) return; |
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|
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var scope = (this.root === d ? d : this.root); |
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var groups = Array.prototype.slice.call(scope.querySelectorAll(this.opts.group_selector)); |
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|
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for (var i = 0; i < groups.length; i++) { |
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this._sync_from_writer(groups[i]); |
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this._clamp_to_range(groups[i]); |
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} |
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} |
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|
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// ------------------------------------------------------------------------------------------------- |
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// Internal |
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// ------------------------------------------------------------------------------------------------- |
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_debounced_refresh() { |
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if (this._refresh_tmr) clearTimeout(this._refresh_tmr); |
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this._refresh_tmr = setTimeout(() => { |
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this._refresh_tmr = null; |
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this.refresh(); |
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}, Number(this.opts.observer_debounce_ms) || 0); |
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} |
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|
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_find_group(el) { |
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return (el && el.closest) ? el.closest(this.opts.group_selector) : null; |
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} |
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|
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_get_parts(group) { |
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if (!group) return null; |
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return { |
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group : group, |
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num : group.querySelector(this.opts.value_selector), |
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range : group.querySelector(this.opts.range_selector), |
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writer: group.querySelector(this.opts.writer_selector) |
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}; |
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} |
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|
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_write(parts, value, emit) { |
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if (!parts) return; |
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|
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if (parts.writer) { |
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parts.writer.__wpbc_slider_range_internal = true; |
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parts.writer.value = String(value); |
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if (emit) emit_input(parts.writer); |
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parts.writer.__wpbc_slider_range_internal = false; |
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} else if (parts.num) { |
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// If writer is missing, at least notify via number input. |
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if (emit) emit_input(parts.num); |
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} |
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} |
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|
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_sync_from_writer(group) { |
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var parts = this._get_parts(group); |
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if (!parts || !parts.writer) return; |
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|
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var raw = String(parts.writer.value || '').trim(); |
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if (!raw) return; |
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|
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if (parts.num) parts.num.value = raw; |
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if (parts.range) parts.range.value = raw; |
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} |
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|
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_clamp_to_range(group) { |
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var parts = this._get_parts(group); |
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if (!parts || !parts.range || !parts.num) return; |
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|
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var v = parse_float(parts.num.value); |
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if (v == null) return; |
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|
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var min = Number(parts.range.min); |
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var max = Number(parts.range.max); |
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var vv = clamp_num(v, isNaN(min) ? null : min, isNaN(max) ? null : max); |
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|
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if (String(vv) !== parts.num.value) parts.num.value = String(vv); |
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parts.range.value = String(vv); |
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} |
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|
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_on_input(ev) { |
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var t = ev.target; |
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if (!t) return; |
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|
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var group = this._find_group(t); |
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if (!group) return; |
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|
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var parts = this._get_parts(group); |
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if (!parts) return; |
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|
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// Writer changed externally -> update UI. |
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if (parts.writer && t === parts.writer) { |
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if (t.__wpbc_slider_range_internal) return; |
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this._sync_from_writer(group); |
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this._clamp_to_range(group); |
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return; |
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} |
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|
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// Range moved -> update number + writer. |
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if (t.matches && t.matches(this.opts.range_selector)) { |
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if (parts.num) parts.num.value = t.value; |
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this._write(parts, t.value, /*emit*/ true); |
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return; |
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} |
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|
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// Number typed -> update range + writer (clamp by slider bounds). |
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if (t.matches && t.matches(this.opts.value_selector)) { |
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if (parts.range) { |
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var v = parse_float(t.value); |
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if (v != null) { |
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var min = Number(parts.range.min); |
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var max = Number(parts.range.max); |
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v = clamp_num(v, isNaN(min) ? null : min, isNaN(max) ? null : max); |
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|
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parts.range.value = String(v); |
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if (String(v) !== t.value) t.value = String(v); |
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} |
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} |
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this._write(parts, t.value, /*emit*/ true); |
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} |
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} |
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|
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_on_change(ev) { |
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// No special "change" handling needed currently; kept for symmetry/future. |
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} |
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} |
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|
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// ------------------------------------------------------------------------------------------------- |
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// Auto-init |
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// ------------------------------------------------------------------------------------------------- |
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function wpbc_slider_range_groups__auto_init() { |
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var ROOT = '.wpbc_slider_range_groups'; |
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var nodes = Array.prototype.slice.call(d.querySelectorAll(ROOT)) |
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.filter(function (n) { return !n.parentElement || !n.parentElement.closest(ROOT); }); |
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|
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if (!nodes.length) { |
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if (!d.__wpbc_slider_range_groups_global_instance) { |
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d.__wpbc_slider_range_groups_global_instance = new WPBC_Slider_Range_Groups(d).init(); |
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} |
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return; |
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} |
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|
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nodes.forEach(function (node) { |
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if (node.__wpbc_slider_range_groups_instance) return; |
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node.__wpbc_slider_range_groups_instance = new WPBC_Slider_Range_Groups(node).init(); |
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}); |
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} |
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|
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// Export globals. |
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w.WPBC_Slider_Range_Groups = WPBC_Slider_Range_Groups; |
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w.WPBC_Slider_Range_AutoInit = wpbc_slider_range_groups__auto_init; |
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|
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if (d.readyState === 'loading') { |
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d.addEventListener('DOMContentLoaded', wpbc_slider_range_groups__auto_init, { once: true }); |
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} else { |
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wpbc_slider_range_groups__auto_init(); |
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} |
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|
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})(window, document); |
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|
