/** * Internal floating toolbar manager. * * Renders schema-declared toolbar chrome against one active editor host * contract so text and non-text hosts share the same floating UI behavior. * * Exposes: SFE.ToolbarManager */ (function() { 'use strict'; window.MWP = window.MWP || {}; window.MWP.SFE = window.MWP.SFE || {}; const SFE = window.MWP.SFE; SFE.ManagerData = SFE.ManagerData || {}; const TOOLBAR_FORMAT_ICONS = { undo: '', redo: '', bold: '', italic: '', strikethrough: '', link: '', alignNone: '', alignWide: '', alignFull: '', alignLeft: '', alignCenter: '', alignRight: '', textAlignLeft: '', textAlignCenter: '', textAlignRight: '', orderedList: '', unorderedList: '', indent: '', outdent: '', textAlignmentDropdown: '', replaceMedia: 'Replace', }; /** * Create one runtime toolbar button definition. * * @param {Object} config Button configuration. * @returns {Object} Runtime toolbar button definition. */ function createToolbarButton(config = {}) { return { icon: config.icon || '', title: config.title || '', action: typeof config.action === 'function' ? config.action : () => {}, className: config.className || '', formatKey: config.formatKey || '', formatType: config.formatType || '', value: Object.prototype.hasOwnProperty.call(config, 'value') ? config.value : undefined, tag: config.tag || '', activeTags: Array.isArray(config.activeTags) ? config.activeTags : [], }; } /** * Create one runtime toolbar dropdown definition. * * @param {Object} config Dropdown configuration. * @returns {Object} Runtime toolbar dropdown definition. */ function createToolbarDropdown(config = {}) { return { type: 'dropdown', title: config.title || '', defaultIcon: config.defaultIcon || '', options: Array.isArray(config.options) ? config.options.filter(Boolean) : [], formatKey: config.formatKey || '', }; } /** * Execute one schema block-attribute operation from a toolbar action. * * @param {Object|null} editor Editor host. * @param {string} operationId Schema operation id. * @param {*} value Requested operation value. * @returns {void} */ function executeSchemaBlockAttributeOperation(editor, operationId, value) { const operationExecutor = SFE.SchemaOperationExecutor || null; if (!operationExecutor || typeof operationExecutor.executeBlockAttributeOperation !== 'function') { return; } operationExecutor.executeBlockAttributeOperation({ editorHost: editor, operationId, value, saveHistory: true, }); } /** * Execute one schema list operation from a toolbar action. * * @param {Object|null} editor Editor host. * @param {string} operationId Schema or primitive operation id. * @returns {void} */ function executeSchemaListOperation(editor, operationId) { if (typeof editor?.executeListStructureOperation !== 'function') { return; } editor.executeListStructureOperation({ kind: operationId, }); } /** * Execute one list type switch from a toolbar action. * * @param {Object|null} editor Editor host. * @param {string} listType List type token. * @returns {void} */ function executeListTypeOperation(editor, listType) { const createTag = listType === 'ordered' ? 'ol' : 'ul'; const oppositeTag = listType === 'ordered' ? 'UL' : 'OL'; const operationExecutor = SFE.SchemaOperationExecutor || null; if (editor?._linkUIActive && typeof editor.closeLinkUI === 'function') { editor.closeLinkUI(); } const selection = window.getSelection(); if (selection?.rangeCount > 0) { const range = selection.getRangeAt(0); let startLi = range.startContainer; let endLi = range.endContainer; while (startLi && startLi !== editor?.element && startLi.tagName !== 'LI') { startLi = startLi.parentNode; } while (endLi && endLi !== editor?.element && endLi.tagName !== 'LI') { endLi = endLi.parentNode; } if (startLi && endLi && startLi !== endLi) { return; } } if ( (editor?.element?.tagName === 'UL' || editor?.element?.tagName === 'OL') && operationExecutor && typeof operationExecutor.executeCurrentListTypeChange === 'function' ) { const result = operationExecutor.executeCurrentListTypeChange({ editorHost: editor, value: listType, }); if (result) { return; } } const listItem = typeof editor?.getCurrentListItem === 'function' ? editor.getCurrentListItem() : null; if (!listItem) { if (typeof editor?.insertListManual === 'function') { editor.insertListManual(createTag); setTimeout(() => { const list = typeof editor?.getParentList === 'function' ? editor.getParentList() : null; if (list) { list.classList.add('wp-block-list'); } }, 10); } return; } const currentList = listItem.parentNode; if ( currentList && currentList.tagName === oppositeTag && typeof editor?.changeListType === 'function' ) { editor.changeListType(currentList, createTag); } } /** * Build one toolbar button for a schema token that toggles inline formatting. * * @param {string} token Token name. * @param {string} title Button title. * @param {string} icon Icon markup. * @param {string} tagName Inline tag name. * @param {string[]} activeTags Active-tag list for toolbar state. * @returns {Object} Runtime toolbar button definition. */ function createInlineFormatButton(token, title, icon, tagName, activeTags) { return createToolbarButton({ formatKey: token, title, icon, activeTags, action: (editor) => { if (typeof editor?.toggleInlineFormat !== 'function') { return; } editor.executeAction(() => { editor.toggleInlineFormat(tagName); }, { saveHistory: false }); }, }); } /** * Build one toolbar button for a schema token that opens link editing. * * @param {string} token Token name. * @param {string} title Button title. * @returns {Object} Runtime toolbar button definition. */ function createLinkButton(token, title) { return createToolbarButton({ formatKey: token, title, icon: TOOLBAR_FORMAT_ICONS.link, action: (editor) => { if (typeof editor?.showLinkUI !== 'function') { return; } const usesElementScopedLinkEditing = typeof editor.supportsElementLinkEditing === 'function' ? editor.supportsElementLinkEditing() : false; const existingLink = typeof editor.getParentElement === 'function' ? editor.getParentElement('a') : null; editor.showLinkUI(usesElementScopedLinkEditing ? null : existingLink); }, }); } /** * Determine whether schema declares element-scoped link editing for the * active text component. * * @param {HTMLElement|null} element Active editable element. * @param {Object} editorOptions Normalized component editor options. * @returns {boolean} True when the component edits its root anchor directly. */ function supportsElementScopedLinkToken(element, editorOptions = {}) { if (!element || element.tagName !== 'A') { return false; } const inlineFormatCapabilities = ( editorOptions?.inlineFormatCapabilities && typeof editorOptions.inlineFormatCapabilities === 'object' ) ? editorOptions.inlineFormatCapabilities : null; const attributeCapabilities = ( editorOptions?.attributeCapabilities && typeof editorOptions.attributeCapabilities === 'object' ) ? editorOptions.attributeCapabilities : null; const buttonLinkCapability = inlineFormatCapabilities?.buttonLink; const buttonLinkTag = typeof buttonLinkCapability?.tag === 'string' ? buttonLinkCapability.tag.trim().toLowerCase() : ''; if (buttonLinkTag !== 'a') { return false; } const attributes = Array.isArray(attributeCapabilities?.buttonLink?.attributes) ? attributeCapabilities.buttonLink.attributes .map(value => (typeof value === 'string' ? value.trim() : '')) .filter(Boolean) : []; return attributes.includes('url'); } /** * Build one toolbar button for a schema list indentation action. * * @param {string} token Token name. * @param {string} title Button title. * @param {string} icon Icon markup. * @param {string} operationId Schema list operation id. * @returns {Object} Runtime toolbar button definition. */ function createListIndentButton(token, title, icon, operationId) { return createToolbarButton({ formatKey: token, title, icon, action: (editor) => { executeSchemaListOperation(editor, operationId); }, }); } /** * Build one toolbar option for schema-backed block alignment. * * @param {string} optionKey Icon/format lookup key. * @param {string} title Option title. * @param {string} value Alignment value. * @returns {Object} Runtime toolbar option definition. */ function createBlockAlignOption(optionKey, title, value) { return createToolbarButton({ formatKey: optionKey, formatType: 'blockAlign', title, icon: TOOLBAR_FORMAT_ICONS[optionKey], value, action: (editor) => { executeSchemaBlockAttributeOperation(editor, 'set_align', value); }, }); } /** * Build one toolbar option for schema-backed text alignment. * * @param {string} optionKey Icon/format lookup key. * @param {string} title Option title. * @param {string} value Alignment value. * @returns {Object} Runtime toolbar option definition. */ function createTextAlignmentOption(optionKey, title, value) { return createToolbarButton({ formatKey: optionKey, formatType: 'textAlignment', title, icon: TOOLBAR_FORMAT_ICONS[optionKey], value, action: (editor) => { executeSchemaBlockAttributeOperation(editor, 'set_text_align', value); }, }); } /** * Build one toolbar option for schema-backed heading level changes. * * @param {string|number} level Heading level or element-tag value. * @returns {Object} Runtime toolbar option definition. */ function createHeadingLevelOption(level) { const value = typeof level === 'string' ? level.trim().toLowerCase() : level; const tag = typeof value === 'number' ? `h${value}` : value; const levelNumber = Number.parseInt(String(tag).replace(/^h/i, ''), 10); const title = tag === 'p' ? 'Paragraph' : tag === 'div' ? 'Div' : `Heading ${levelNumber}`; return createToolbarButton({ formatKey: String(tag), title, icon: title, tag, value, action: (editor) => { executeSchemaBlockAttributeOperation(editor, 'set_heading_level', value); }, }); } /** * Return the canonical built-in block-align toolbar option map. * * @returns {Map} Built-in block-align options keyed by value. */ function getBlockAlignOptionMap() { return new Map([ ['none', createBlockAlignOption('alignNone', 'None', 'none')], ['wide', createBlockAlignOption('alignWide', 'Wide Width', 'wide')], ['full', createBlockAlignOption('alignFull', 'Full Width', 'full')], ['left', createBlockAlignOption('alignLeft', 'Align Left', 'left')], ['center', createBlockAlignOption('alignCenter', 'Align Center', 'center')], ['right', createBlockAlignOption('alignRight', 'Align Right', 'right')], ]); } /** * Create the schema-backed text-alignment dropdown. * * @returns {Object} Runtime toolbar dropdown definition. */ function createTextAlignmentDropdown() { return createToolbarDropdown({ formatKey: 'textAlignment', title: 'Text Alignment', defaultIcon: TOOLBAR_FORMAT_ICONS.textAlignmentDropdown, options: [ createTextAlignmentOption('textAlignLeft', 'Align Text Left', 'left'), createTextAlignmentOption('textAlignCenter', 'Align Text Center', 'center'), createTextAlignmentOption('textAlignRight', 'Align Text Right', 'right'), ], }); } function getSchemaBlockAlignValues(editorOptions = {}) { const operations = Array.isArray(editorOptions?.operations) ? editorOptions.operations : []; const operation = operations.find(candidate => ( String(candidate?.id || '').trim() === 'set_align' && String(candidate?.kind || '').trim() === 'block_attribute_change' )) || null; const operationValues = Array.isArray(operation?.values) ? operation.values : null; const capabilityValues = Array.isArray(editorOptions?.attributeCapabilities?.align?.values) ? editorOptions.attributeCapabilities.align.values : null; const values = operationValues && operationValues.length ? operationValues : capabilityValues; return Array.isArray(values) ? values.map(value => String(value || '').trim().toLowerCase()).filter(Boolean) : []; } function createBlockAlignDropdown(editorOptions = {}) { const allowedValues = getSchemaBlockAlignValues(editorOptions); const optionMap = getBlockAlignOptionMap(); const options = allowedValues.map(value => optionMap.get(value)).filter(Boolean); if (!options.length) { return null; } return createToolbarDropdown({ formatKey: 'align', title: 'Align', defaultIcon: options[0].icon, options }); } /** * Create the schema-backed heading-level dropdown. * * @returns {Object} Runtime toolbar dropdown definition. */ function createHeadingDropdown(editorOptions = {}) { const operation = (editorOptions.operations || []).find(candidate => ( String(candidate?.id || '').trim() === 'set_heading_level' )) || null; const values = Array.isArray(operation?.values) ? operation.values : (editorOptions.attributeCapabilities?.headingLevels?.values || []); return createToolbarDropdown({ formatKey: 'headingLevels', title: 'Heading Level', defaultIcon: 'H', options: values.map(createHeadingLevelOption), }); } /** * Create the shared media-replace toolbar button. * * @returns {Object} Runtime toolbar button definition. */ function createReplaceMediaButton() { return createToolbarButton({ formatKey: 'replaceMedia', icon: TOOLBAR_FORMAT_ICONS.replaceMedia, title: 'Replace Media', className: 'mwp-sfe-editor-btn-text', action: (editor) => { if (typeof editor?.showMediaReplaceUI === 'function') { editor.showMediaReplaceUI(); } } }); } /** * Resolve one built-in schema toolbar token to a runtime format definition. * * @param {string} token Built-in schema toolbar token. * @param {HTMLElement|null} element Active editable element. * @param {Object} editorOptions Normalized editor options. * @returns {Object|null} Runtime toolbar definition or null. */ function resolveSchemaFormatToken(token, element, editorOptions = {}) { const normalizedToken = typeof token === 'string' ? token.trim() : ''; if (!normalizedToken) return null; switch (normalizedToken) { case 'undo': return createToolbarButton({ formatKey: 'undo', title: 'Undo', icon: TOOLBAR_FORMAT_ICONS.undo, action: (editor) => editor?.undo?.(), }); case 'redo': return createToolbarButton({ formatKey: 'redo', title: 'Redo', icon: TOOLBAR_FORMAT_ICONS.redo, action: (editor) => editor?.redo?.(), }); case 'bold': return createInlineFormatButton('bold', 'Bold', TOOLBAR_FORMAT_ICONS.bold, 'strong', ['strong', 'b']); case 'italic': return createInlineFormatButton('italic', 'Italic', TOOLBAR_FORMAT_ICONS.italic, 'em', ['em', 'i']); case 'strikethrough': return createInlineFormatButton('strikethrough', 'Strikethrough', TOOLBAR_FORMAT_ICONS.strikethrough, 's', ['s', 'strike']); case 'link': return createLinkButton('link', 'Link'); case 'buttonLink': return !supportsElementScopedLinkToken(element, editorOptions) ? null : createLinkButton('buttonLink', 'Button Link'); case 'textAlignment': return createTextAlignmentDropdown(); case 'align': return createBlockAlignDropdown(editorOptions); case 'headingLevels': return createHeadingDropdown(editorOptions); case 'orderedList': return createToolbarButton({ formatKey: 'orderedList', title: 'Ordered List', icon: TOOLBAR_FORMAT_ICONS.orderedList, action: (editor) => executeListTypeOperation(editor, 'ordered'), }); case 'unorderedList': return createToolbarButton({ formatKey: 'unorderedList', title: 'Unordered List', icon: TOOLBAR_FORMAT_ICONS.unorderedList, action: (editor) => executeListTypeOperation(editor, 'unordered'), }); case 'indent': return createListIndentButton('indent', 'Indent', TOOLBAR_FORMAT_ICONS.indent, 'indent_list_item'); case 'outdent': return createListIndentButton('outdent', 'Outdent', TOOLBAR_FORMAT_ICONS.outdent, 'outdent_list_item'); case 'replaceMedia': return createReplaceMediaButton(); default: return null; } } /** * Convert one nested schema format token spec into concrete toolbar configs. * * @param {Array} formatsSpec Nested schema token spec. * @param {HTMLElement|null} element Active editable element. * @param {Object} editorOptions Normalized editor options. * @param {number} depth Current recursion depth. * @returns {Array|null} Concrete toolbar config tree. */ function buildFormatsFromSchemaSpec(formatsSpec, element, editorOptions = {}, depth = 0) { if (depth > 3 || !Array.isArray(formatsSpec)) return null; const resolved = []; formatsSpec.forEach(item => { if (typeof item === 'string') { const format = resolveSchemaFormatToken(item, element, editorOptions); if (format) { resolved.push(format); } return; } if (Array.isArray(item)) { const group = buildFormatsFromSchemaSpec(item, element, editorOptions, depth + 1); if (Array.isArray(group) && group.length) { resolved.push(group); } } }); return resolved.length ? resolved : null; } /** * Flatten one nested toolbar definition tree into a single format list. * * @param {Array} items Nested toolbar definition tree. * @returns {Object[]} Flat format list. */ function flattenFormats(items = []) { const flattened = []; (items || []).forEach((item) => { if (Array.isArray(item)) { flattened.push(...flattenFormats(item)); return; } if (!item || typeof item !== 'object') { return; } flattened.push(item); if (item.type === 'dropdown' && Array.isArray(item.options)) { flattened.push(...flattenFormats(item.options)); } }); return flattened; } class ToolbarManager { constructor(host, options = {}) { this.host = host || null; this.options = options || {}; this.toolbar = null; this._toolbarPointerdownHandler = null; this._activeToolbarDropdownWrapper = null; if (this.host && typeof this.host.attachToolbarManager === 'function') { this.host.attachToolbarManager(this); } } getFormats() { return Array.isArray(this.host?.formats) ? this.host.formats : []; } /** * Return one flat runtime toolbar format list. * * @returns {Object[]} Flat toolbar format list. */ getFlatFormats() { return flattenFormats(this.getFormats()); } createToolbar() { if (this.toolbar && this.toolbar.parentNode) this.toolbar.remove(); this.toolbar = document.createElement('div'); this.toolbar.className = 'mwp-sfe-editor-toolbar'; const selectorSvg = ''; const createButton = (format) => { const btn = document.createElement('button'); btn.type = 'button'; btn.className = ['mwp-sfe-editor-btn', format.className || ''].filter(Boolean).join(' '); btn.innerHTML = format.icon; btn.title = format.title; btn.dataset.format = format.title; if (format.title === 'Undo') btn.dataset.action = 'undo'; if (format.title === 'Redo') btn.dataset.action = 'redo'; btn.addEventListener('mousedown', (event) => event.preventDefault()); btn.addEventListener('click', (event) => { event.preventDefault(); format.action(this.host); }); return btn; }; const buildItems = (items, container) => { items.forEach(item => { if (Array.isArray(item)) { const group = document.createElement('div'); group.className = 'mwp-sfe-btn-group'; buildItems(item, group); container.appendChild(group); } else if (item.type === 'dropdown') { const wrapper = document.createElement('div'); wrapper.className = 'mwp-sfe-dropdown'; const toggle = document.createElement('button'); toggle.className = 'mwp-sfe-editor-btn mwp-sfe-dropdown-toggle'; toggle.title = item.title; if (item.formatKey === 'headingLevels') { wrapper.classList.add('mwp-sfe-dropdown-heading-level'); toggle.innerHTML = `${item.defaultIcon} ${selectorSvg}`; } else { toggle.innerHTML = `${item.defaultIcon}`; } const content = document.createElement('div'); content.className = 'mwp-sfe-dropdown-content'; item.options.forEach(opt => { const optBtn = createButton(opt); optBtn.addEventListener('click', () => { if (item.formatKey === 'headingLevels') { toggle.innerHTML = `${opt.icon} ${selectorSvg}`; } else { toggle.innerHTML = `${opt.icon}`; } content.classList.remove('mwp-sfe-show'); }); content.appendChild(optBtn); }); toggle.addEventListener('mousedown', (event) => event.preventDefault()); toggle.addEventListener('click', (event) => { event.preventDefault(); this.toolbar.querySelectorAll('.mwp-sfe-dropdown-content.mwp-sfe-show').forEach(el => { if (el !== content) el.classList.remove('mwp-sfe-show'); }); content.classList.toggle('mwp-sfe-show'); this._activeToolbarDropdownWrapper = content.classList.contains('mwp-sfe-show') ? wrapper : null; }); wrapper.appendChild(toggle); wrapper.appendChild(content); if (container.className !== 'mwp-sfe-btn-group') { const group = document.createElement('div'); group.className = 'mwp-sfe-btn-group'; group.appendChild(wrapper); container.appendChild(group); } else { container.appendChild(wrapper); } } else { const btn = createButton(item); if (container.className !== 'mwp-sfe-btn-group') { const group = document.createElement('div'); group.className = 'mwp-sfe-btn-group'; group.appendChild(btn); container.appendChild(group); } else { container.appendChild(btn); } } }); }; buildItems(this.getFormats(), this.toolbar); this.attachToolbarDropdownCloseHandler(); const toolbarContainer = this.host?.options?.toolbarContainer || null; if (toolbarContainer) { toolbarContainer.innerHTML = ''; toolbarContainer.appendChild(this.toolbar); } else if (this.host?.element?.parentNode) { this.host.element.parentNode.insertBefore(this.toolbar, this.host.element); } this.updateUndoRedoButtons(); } closeToolbarDropdowns() { if (!this.toolbar) { return; } this.toolbar.querySelectorAll('.mwp-sfe-dropdown-content.mwp-sfe-show').forEach((element) => { element.classList.remove('mwp-sfe-show'); }); this._activeToolbarDropdownWrapper = null; } attachToolbarDropdownCloseHandler() { if (!this.toolbar) { return; } if (this._toolbarPointerdownHandler) { document.removeEventListener('pointerdown', this._toolbarPointerdownHandler, true); } this._toolbarPointerdownHandler = (event) => { if ( !this.toolbar || ( this._activeToolbarDropdownWrapper && this._activeToolbarDropdownWrapper.contains(event.target) ) ) { return; } this.closeToolbarDropdowns(); }; document.addEventListener('pointerdown', this._toolbarPointerdownHandler, true); } updateUndoRedoButtons() { if (!this.toolbar) return; const undoBtn = this.toolbar.querySelector('[data-action="undo"]'); const redoBtn = this.toolbar.querySelector('[data-action="redo"]'); const canUndo = typeof this.host?.canUndo === 'function' ? this.host.canUndo() : ( typeof this.host?.historyIndex === 'number' && this.host.historyIndex > 0 ); const canRedo = typeof this.host?.canRedo === 'function' ? this.host.canRedo() : ( typeof this.host?.historyIndex === 'number' && Array.isArray(this.host?.history) && this.host.historyIndex < this.host.history.length - 1 ); if (undoBtn) { undoBtn.disabled = !canUndo; } if (redoBtn) { redoBtn.disabled = !canRedo; } } setToolbarButtonDisabled(title, isDisabled) { if (!this.toolbar || !title) { return; } const button = this.toolbar.querySelector(`button[title="${title}"]`); if (button) { button.disabled = !!isDisabled; } } updateToolbarState() { if (!this.toolbar || !this.host) return; const selection = window.getSelection(); const hasSelectionInEditor = ( selection && selection.rangeCount && typeof this.host.isSelectionInEditor === 'function' && this.host.isSelectionInEditor() ); const parents = []; if (this.host.element?.tagName) { parents.push(this.host.element.tagName.toLowerCase()); } if (hasSelectionInEditor) { const range = selection.getRangeAt(0); let node = range.commonAncestorContainer; while (node && node !== this.host.element) { if (node.nodeType === 1) parents.push(node.tagName.toLowerCase()); node = node.parentNode; } } this.toolbar.querySelectorAll('.mwp-sfe-editor-btn').forEach(btn => { btn.classList.remove('mwp-sfe-editor-btn-active'); }); const checkActive = (format, tags) => { if (!format || !Array.isArray(tags) || !tags.some(tag => parents.includes(tag))) { return false; } const btn = this.toolbar.querySelector(`button[title="${format.title}"]`); if (btn) btn.classList.add('mwp-sfe-editor-btn-active'); return true; }; if (hasSelectionInEditor) { this.getFlatFormats().forEach((format) => { if (!Array.isArray(format?.activeTags) || !format.activeTags.length) { return; } checkActive(format, format.activeTags); }); } const currentAlign = typeof this.host.getBlockAlignState === 'function' ? this.host.getBlockAlignState() : 'none'; const currentTextAlignment = typeof this.host.getTextAlignmentState === 'function' ? this.host.getTextAlignmentState() : 'left'; const currentHeadingLevel = typeof this.host.getHeadingLevelState === 'function' ? this.host.getHeadingLevelState() : null; const getDropdownFormats = (items) => { const dropdowns = []; (items || []).forEach(item => { if (Array.isArray(item)) { dropdowns.push(...getDropdownFormats(item)); return; } if (item && item.type === 'dropdown') { dropdowns.push(item); } }); return dropdowns; }; getDropdownFormats(this.getFormats()).forEach(item => { const toggle = this.toolbar.querySelector(`button[title="${item.title}"]`); if (!toggle) return; const activeOption = item.options.find(opt => { const headingLevel = typeof this.host.getHeadingLevelValueForOption === 'function' ? this.host.getHeadingLevelValueForOption(opt) : null; if ( item.formatKey === 'headingLevels' && headingLevel === currentHeadingLevel ) { return true; } if ( typeof this.host.isTextAlignmentOptionActive === 'function' && this.host.isTextAlignmentOptionActive(opt, currentTextAlignment) ) { return true; } if ( typeof this.host.isBlockAlignOptionActive === 'function' && this.host.isBlockAlignOptionActive(opt, currentAlign) ) { return true; } return false; }); const selectorSvg = ''; if (activeOption) { toggle.innerHTML = item.formatKey === 'headingLevels' ? `${activeOption.icon} ${selectorSvg}` : `${activeOption.icon}`; } else { toggle.innerHTML = item.formatKey === 'headingLevels' ? `${item.defaultIcon} ${selectorSvg}` : `${item.defaultIcon}`; } item.options.forEach(opt => { const optionButton = this.toolbar.querySelector(`button[title="${opt.title}"]`); if (!optionButton) return; let isDisabled = false; if (item.formatKey === 'headingLevels') { const optionLevel = typeof this.host.getHeadingLevelValueForOption === 'function' ? this.host.getHeadingLevelValueForOption(opt) : null; isDisabled = optionLevel === currentHeadingLevel; } else if ( typeof this.host.getTextAlignmentValueForOption === 'function' && this.host.getTextAlignmentValueForOption(opt) ) { isDisabled = typeof this.host.isTextAlignmentOptionActive === 'function' ? this.host.isTextAlignmentOptionActive(opt, currentTextAlignment) : false; } else if ( typeof this.host.getBlockAlignValueForOption === 'function' && this.host.getBlockAlignValueForOption(opt) ) { isDisabled = typeof this.host.isBlockAlignOptionActive === 'function' ? this.host.isBlockAlignOptionActive(opt, currentAlign) : false; } optionButton.disabled = isDisabled; }); }); const operationExecutor = SFE.SchemaOperationExecutor || null; const currentListItem = typeof this.host.getCurrentListItem === 'function' ? this.host.getCurrentListItem() : null; const currentList = ( operationExecutor && typeof operationExecutor.getCurrentListElement === 'function' ) ? operationExecutor.getCurrentListElement(this.host) : ( typeof this.host.getParentList === 'function' ? this.host.getParentList() : null ); const canIndent = typeof this.host.canIndentListItem === 'function' ? this.host.canIndentListItem(currentListItem) : false; const canOutdent = typeof this.host.canOutdentListItem === 'function' ? this.host.canOutdentListItem(currentListItem) : false; this.setToolbarButtonDisabled('Ordered List', !currentList || currentList.tagName === 'OL'); this.setToolbarButtonDisabled('Unordered List', !currentList || currentList.tagName === 'UL'); this.setToolbarButtonDisabled('Indent', !currentListItem || !canIndent); this.setToolbarButtonDisabled('Outdent', !currentListItem || !canOutdent); this.updateUndoRedoButtons(); } destroy(options = {}) { const removeToolbar = options.removeToolbar !== false; if (this._toolbarPointerdownHandler) { document.removeEventListener('pointerdown', this._toolbarPointerdownHandler, true); this._toolbarPointerdownHandler = null; } this._activeToolbarDropdownWrapper = null; if (removeToolbar && this.toolbar && this.toolbar.parentNode) { this.toolbar.remove(); } if (this.host && typeof this.host.detachToolbarManager === 'function') { this.host.detachToolbarManager(this); } this.toolbar = removeToolbar ? null : this.toolbar; this.host = null; } static resolveFormats(editorOptions = {}, element = null) { const schemaFormats = buildFormatsFromSchemaSpec(editorOptions?.formats, element, editorOptions); return Array.isArray(schemaFormats) && schemaFormats.length ? schemaFormats : []; } } SFE.ToolbarManager = ToolbarManager; if (typeof module !== 'undefined' && module.exports) { module.exports = { ToolbarManager }; } })(); Mono-Ethylene Glycol (MEG) - Delow Chemicals Limited
  • No 22 west land, Lagos - Nigeria
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Mono-Ethylene Glycol (MEG)

Reliable Hydrate Inhibitor and Industrial Feedstock

Product Overview

Mono-Ethylene Glycol (MEG) is a colorless, odorless, and hygroscopic liquid widely used in the oil & gas, petrochemical, and industrial sectors. At Delow Chemicals Limited, we supply high-quality MEG sourced from globally recognized producers. Known for its effectiveness as a hydrate inhibitor and its versatility as a raw material, MEG is essential for safe pipeline operations and industrial manufacturing.

Applications

  • Oil & Gas: Hydrate inhibitor to prevent blockages in natural gas pipelines and processing facilities.

  • Petrochemicals: Key feedstock for polyester fibers, PET resins, and antifreeze formulations.

  • Industrial Cooling Systems: Component in heat transfer fluids and coolants.

  • Automotive & Aviation: Used in antifreeze and de-icing solutions.

  • Other Uses: Solvent in inks, dyes, and adhesives.

 

Key Features & Benefits
  • High Purity & Consistency – Consistent quality for critical oil & gas applications.
  • Effective Hydrate Inhibition – Prevents costly downtime in pipelines and processing plants.
  • Versatile Applications – Suitable for energy, automotive, and industrial uses.
  • Secure Packaging – Supplied in drums, IBC tanks, or bulk delivery options.
  • Environmentally Compliant – Distributed under strict HSE standards.
Technical Specifications
  • Chemical Formula – C₂H₆O₂
  • Appearance – Clear, colorless liquid
  • Purity – 99% minimum
  • Boiling Point – 197°C
  • Freezing Point – -13°C
  • Specific Gravity – 1.11 g/cm³ at 20°C
  • Packaging – 230kg steel drums, IBC tanks (1,000L), bulk (on request)
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At Delow Chemicals Limited, we make it simple to request pricing and product details tailored to your needs. Whether you’re sourcing for drilling operations, petrochemical processing, or industrial use, our team is ready to provide fast, accurate, and transparent quotations.

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Whether you’re requesting a quote, seeking product information, or exploring partnership opportunities, our team is here to provide quick and reliable assistance. Reach out to us today—we’d love to hear from you.

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+234 704 700 4076

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+234 704 700 4076