| 1 |
/* globals window, document */ |
| 2 |
/** |
| 3 |
* WPBC Slider Length Groups |
| 4 |
* |
| 5 |
* Universal, dependency-free controller that keeps a "length" control in sync: |
| 6 |
* - number input (data-wpbc_slider_len_value) |
| 7 |
* - unit select (data-wpbc_slider_len_unit) |
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* - range slider (data-wpbc_slider_len_range) |
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* - writer input (data-wpbc_slider_len_writer) [optional but recommended] |
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* |
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* The "writer" stores the combined value like: "100%", "420px", "12.5rem". |
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* When number/unit/slider change -> writer updates and emits 'input' (bubbles). |
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* When writer is changed externally (apply-from-JSON, etc) -> UI updates. |
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* |
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* Markup expectations (minimal): |
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* <div class="wpbc_slider_len_group" |
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* data-wpbc_slider_len_bounds_map='{"%":{"min":30,"max":100,"step":1},"px":{"min":300,"max":2000,"step":10}}' |
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* data-wpbc_slider_len_default_unit="%"> |
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* <input type="number" data-wpbc_slider_len_value> |
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* <select data-wpbc_slider_len_unit>...</select> |
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* <input type="range" data-wpbc_slider_len_range> |
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* <input type="text" data-wpbc_slider_len_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 (prevents performance issues). |
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* - If your UI re-renders and inserts new groups dynamically, call: |
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* WPBC_Slider_Len_AutoInit(); OR instance.refresh(); |
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* Or enable observer via: new WPBC_Slider_Len_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_len_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 safe_json_parse(str) { |
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try { |
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return JSON.parse(str); |
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} catch (e) { |
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return null; |
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} |
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} |
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|
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function parse_len_combined(raw, default_unit) { |
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var s = (raw == null) ? '' : String(raw).trim(); |
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if (!s) return { num: '', unit: default_unit || '%' }; |
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|
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var m = s.match(/^\s*([\-]?\d+(?:\.\d+)?)\s*([a-z%]*)\s*$/i); |
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if (!m) { |
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// If it's not parseable, treat as number and keep default unit. |
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return { num: s, unit: default_unit || '%' }; |
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} |
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|
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var num = m[1] ? String(m[1]) : ''; |
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var unit = m[2] ? String(m[2]) : ''; |
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if (!unit) unit = default_unit || '%'; |
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|
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return { num: num, unit: unit }; |
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} |
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|
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function build_combined(num, unit) { |
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if (num == null || String(num).trim() === '') return ''; |
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return String(num) + String(unit || ''); |
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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_Len_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_len_group', |
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value_selector : '[data-wpbc_slider_len_value]', |
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unit_selector : '[data-wpbc_slider_len_unit]', |
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range_selector : '[data-wpbc_slider_len_range]', |
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writer_selector : '[data-wpbc_slider_len_writer]', |
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|
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default_unit : '%', |
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|
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fallback_bounds : { |
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'px' : { min: 0, max: 512, step: 1 }, |
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'%' : { min: 0, max: 100, step: 1 }, |
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'rem': { min: 0, max: 10, step: 0.1 }, |
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'em' : { min: 0, max: 10, step: 0.1 } |
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}, |
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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._bounds_cache = new WeakMap(); // group -> bounds_map_object |
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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_group_from_writer(groups[i]); |
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this._apply_bounds_for_current_unit(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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unit : group.querySelector(this.opts.unit_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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_get_default_unit(group) { |
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var du = (group && group.getAttribute) |
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? group.getAttribute('data-wpbc_slider_len_default_unit') |
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: ''; |
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return du ? String(du) : this.opts.default_unit; |
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} |
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|
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_get_bounds_map(group) { |
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if (!group) return null; |
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if (this._bounds_cache.has(group)) { |
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return this._bounds_cache.get(group); |
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} |
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|
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var raw = group.getAttribute('data-wpbc_slider_len_bounds_map'); |
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var map = raw ? safe_json_parse(raw) : null; |
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if (!map || typeof map !== 'object') map = null; |
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|
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this._bounds_cache.set(group, map); |
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return map; |
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} |
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|
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_get_bounds_for_unit(group, unit) { |
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var map = this._get_bounds_map(group); |
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if (map && unit && map[unit]) { |
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return map[unit]; |
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} |
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return this.opts.fallback_bounds[unit] || this.opts.fallback_bounds['px']; |
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} |
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|
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_apply_bounds(parts, bounds) { |
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if (!parts || !bounds) return; |
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|
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var min = (bounds.min != null) ? Number(bounds.min) : null; |
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var max = (bounds.max != null) ? Number(bounds.max) : null; |
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var step = (bounds.step != null) ? Number(bounds.step) : null; |
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|
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if (parts.range) { |
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if (!isNaN(min)) parts.range.min = String(min); |
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if (!isNaN(max)) parts.range.max = String(max); |
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if (!isNaN(step)) parts.range.step = String(step); |
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} |
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if (parts.num) { |
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if (!isNaN(min)) parts.num.min = String(min); |
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if (!isNaN(max)) parts.num.max = String(max); |
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if (!isNaN(step)) parts.num.step = String(step); |
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} |
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} |
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|
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_apply_bounds_for_current_unit(group) { |
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var parts = this._get_parts(group); |
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if (!parts || !parts.unit) return; |
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|
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var unit = parts.unit.value || this._get_default_unit(group); |
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var b = this._get_bounds_for_unit(group, unit); |
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|
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this._apply_bounds(parts, b); |
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|
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// Clamp current value to new bounds. |
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var v = parse_float(parts.num && parts.num.value ? parts.num.value : (parts.range ? parts.range.value : '')); |
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if (v == null) return; |
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|
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var min = (b && b.min != null) ? Number(b.min) : null; |
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var max = (b && b.max != null) ? Number(b.max) : null; |
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v = clamp_num(v, isNaN(min) ? null : min, isNaN(max) ? null : max); |
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|
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if (parts.num) parts.num.value = String(v); |
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if (parts.range) parts.range.value = String(v); |
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|
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this._write_combined(parts, String(v), unit, /*emit*/ false); |
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} |
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|
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_write_combined(parts, num, unit, emit) { |
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if (!parts) return; |
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|
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var combined = build_combined(num, unit); |
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|
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if (parts.writer) { |
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// Avoid recursion: mark as internal write. |
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parts.writer.__wpbc_slider_len_internal = true; |
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parts.writer.value = combined; |
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if (emit) emit_input(parts.writer); |
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parts.writer.__wpbc_slider_len_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_group_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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var du = this._get_default_unit(group); |
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var p = parse_len_combined(raw, du); |
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|
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if (parts.unit) parts.unit.value = p.unit; |
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if (parts.num) parts.num.value = p.num; |
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if (parts.range) parts.range.value = p.num; |
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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. |
| 318 |
if (parts.writer && t === parts.writer) { |
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if (t.__wpbc_slider_len_internal) return; |
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this._sync_group_from_writer(group); |
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this._apply_bounds_for_current_unit(group); |
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return; |
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} |
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|
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// Slider 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; |
| 328 |
|
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var unit = (parts.unit && parts.unit.value) ? parts.unit.value : this._get_default_unit(group); |
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this._write_combined(parts, t.value, unit, /*emit*/ true); |
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return; |
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} |
| 333 |
|
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// Number typed -> update slider + writer (clamp if slider has bounds). |
| 335 |
if (t.matches && t.matches(this.opts.value_selector)) { |
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var v = parse_float(t.value); |
| 337 |
|
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if (v != null && parts.range) { |
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var rmin = Number(parts.range.min); |
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var rmax = Number(parts.range.max); |
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v = clamp_num(v, isNaN(rmin) ? null : rmin, isNaN(rmax) ? null : rmax); |
| 342 |
|
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parts.range.value = String(v); |
| 344 |
if (String(v) !== t.value) t.value = String(v); |
| 345 |
} |
| 346 |
|
| 347 |
var unit2 = (parts.unit && parts.unit.value) ? parts.unit.value : this._get_default_unit(group); |
| 348 |
this._write_combined(parts, t.value, unit2, /*emit*/ true); |
| 349 |
} |
| 350 |
} |
| 351 |
|
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_on_change(ev) { |
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var t = ev.target; |
| 354 |
if (!t) return; |
| 355 |
|
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var group = this._find_group(t); |
| 357 |
if (!group) return; |
| 358 |
|
| 359 |
var parts = this._get_parts(group); |
| 360 |
if (!parts) return; |
| 361 |
|
| 362 |
// Unit changed -> update bounds + writer. |
| 363 |
if (t.matches && t.matches(this.opts.unit_selector)) { |
| 364 |
this._apply_bounds_for_current_unit(group); |
| 365 |
|
| 366 |
var num = parts.num ? parts.num.value : (parts.range ? parts.range.value : ''); |
| 367 |
var unit = t.value || this._get_default_unit(group); |
| 368 |
this._write_combined(parts, num, unit, /*emit*/ true); |
| 369 |
} |
| 370 |
} |
| 371 |
} |
| 372 |
|
| 373 |
// ------------------------------------------------------------------------------------------------- |
| 374 |
// Auto-init |
| 375 |
// ------------------------------------------------------------------------------------------------- |
| 376 |
function wpbc_slider_len_groups__auto_init() { |
| 377 |
var ROOT = '.wpbc_slider_len_groups'; |
| 378 |
var nodes = Array.prototype.slice.call(d.querySelectorAll(ROOT)) |
| 379 |
.filter(function (n) { return !n.parentElement || !n.parentElement.closest(ROOT); }); |
| 380 |
|
| 381 |
// If no explicit containers, install a single document-root instance. |
| 382 |
if (!nodes.length) { |
| 383 |
if (!d.__wpbc_slider_len_groups_global_instance) { |
| 384 |
d.__wpbc_slider_len_groups_global_instance = new WPBC_Slider_Len_Groups(d).init(); |
| 385 |
} |
| 386 |
return; |
| 387 |
} |
| 388 |
|
| 389 |
nodes.forEach(function (node) { |
| 390 |
if (node.__wpbc_slider_len_groups_instance) return; |
| 391 |
node.__wpbc_slider_len_groups_instance = new WPBC_Slider_Len_Groups(node).init(); |
| 392 |
}); |
| 393 |
} |
| 394 |
|
| 395 |
// Export globals (manual control if needed). |
| 396 |
w.WPBC_Slider_Len_Groups = WPBC_Slider_Len_Groups; |
| 397 |
w.WPBC_Slider_Len_AutoInit = wpbc_slider_len_groups__auto_init; |
| 398 |
|
| 399 |
// DOM-ready auto init. |
| 400 |
if (d.readyState === 'loading') { |
| 401 |
d.addEventListener('DOMContentLoaded', wpbc_slider_len_groups__auto_init, { once: true }); |
| 402 |
} else { |
| 403 |
wpbc_slider_len_groups__auto_init(); |
| 404 |
} |
| 405 |
|
| 406 |
})(window, document); |
| 407 |
|
