Source/WebInspectorUI/UserInterface/Views/SpreadsheetRulesStyleDetailsPanel.js - WebKit - Git at Google

 /*
  * Copyright (C) 2017 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */

 WI.SpreadsheetRulesStyleDetailsPanel = class SpreadsheetRulesStyleDetailsPanel extends WI.StyleDetailsPanel
 {
     constructor(delegate)
     {
         const className = "rules";
         const identifier = "rules";
         const label = WI.UIString("Styles \u2014 Rules");
         super(delegate, className, identifier, label);

         // Make the styles sidebar always left-to-right since CSS is strictly an LTR language.
         this.element.dir = "ltr";

         this._headerMap = new Map;
         this._sections = [];
         this._newRuleSelector = null;
         this._ruleMediaAndInherticanceList = [];
         this._propertyToSelectAndHighlight = null;
         this._filterText = null;
         this._shouldRefreshSubviews = false;

         this._emptyFilterResultsElement = WI.createMessageTextView(WI.UIString("No Results Found"));
     }

     // Public

     refresh(significantChange)
     {
         // We only need to do a rebuild on significant changes. Other changes are handled
         // by the sections and text editors themselves.
         if (significantChange) {
             this._shouldRefreshSubviews = true;
             this.needsLayout();
         }

         super.refresh(significantChange);
     }

     hidden()
     {
         for (let section of this._sections)
             section.hidden();

         super.hidden();
     }

     scrollToSectionAndHighlightProperty(property)
     {
         if (!this._visible) {
             this._propertyToSelectAndHighlight = property;
             return;
         }

         for (let section of this._sections) {
             if (section.highlightProperty(property))
                 return;
         }
     }

     nodeStylesRefreshed(event)
     {
         super.nodeStylesRefreshed(event);

         if (this._propertyToSelectAndHighlight) {
             this.scrollToSectionAndHighlightProperty(this._propertyToSelectAndHighlight);
             this._propertyToSelectAndHighlight = null;
         }
     }

     newRuleButtonClicked()
     {
         if (this.nodeStyles.node.isInUserAgentShadowTree())
             return;

         this._addNewRule();
     }

     newRuleButtonContextMenu(event)
     {
         if (this.nodeStyles.node.isInUserAgentShadowTree())
             return;

         let styleSheets = WI.cssManager.styleSheets.filter(styleSheet => styleSheet.hasInfo() && !styleSheet.isInlineStyleTag() && !styleSheet.isInlineStyleAttributeStyleSheet());
         if (!styleSheets.length)
             return;

         let contextMenu = WI.ContextMenu.createFromEvent(event);

         const handler = null;
         const disabled = true;
         contextMenu.appendItem(WI.UIString("Available Style Sheets"), handler, disabled);

         let [inspectorStyleSheets, regularStyleSheets] = styleSheets.partition(styleSheet => styleSheet.isInspectorStyleSheet());
         console.assert(inspectorStyleSheets.length <= 1, "There should never be more than one inspector style sheet");

         contextMenu.appendItem(WI.UIString("Inspector Style Sheet"), () => {
             this._addNewRule(inspectorStyleSheets.length ? inspectorStyleSheets[0].id : null);
         });

         for (let styleSheet of regularStyleSheets) {
             contextMenu.appendItem(styleSheet.displayName, () => {
                 this._addNewRule(styleSheet.id);
             });
         }
     }

     applyFilter(filterText)
     {
         this._filterText = filterText;

         if (!this.didInitialLayout)
             return;

         if (this._filterText)
             this.element.classList.add("filter-non-matching");

         for (let header of this._headerMap.values())
             header.classList.add(WI.GeneralStyleDetailsSidebarPanel.NoFilterMatchInSectionClassName);

         for (let section of this._sections)
             section.applyFilter(this._filterText);
     }

     focusFirstSection()
     {
         this.spreadsheetCSSStyleDeclarationSectionStartEditingAdjacentRule(null, 1);
     }

     focusLastSection()
     {
         this.spreadsheetCSSStyleDeclarationSectionStartEditingAdjacentRule(null, -1);
     }

     // SpreadsheetCSSStyleDeclarationSection delegate

     spreadsheetCSSStyleDeclarationSectionSelectProperty(property)
     {
         this.scrollToSectionAndHighlightProperty(property);
     }

     spreadsheetCSSStyleDeclarationSectionStartEditingAdjacentRule(currentSection, delta)
     {
         console.assert(delta !== 0);

         let index = this._sections.indexOf(currentSection);
         if (index < 0) {
             if (delta < 0)
                 index = this._sections.length;
             else if (delta > 0)
                 index = -1;
         }
         index += delta;

         while (this._sections[index] !== currentSection) {
             if (index < 0) {
                 if (this._delegate && this._delegate.styleDetailsPanelFocusLastPseudoClassCheckbox) {
                     this._delegate.styleDetailsPanelFocusLastPseudoClassCheckbox(this);
                     break;
                 }

                 index = this._sections.length - 1;
             } else if (index >= this._sections.length) {
                 if (this._delegate && this._delegate.styleDetailsPanelFocusFilterBar) {
                     this._delegate.styleDetailsPanelFocusFilterBar(this);
                     break;
                 }

                 index = 0;
             }

             let section = this._sections[index];
             if (section.editable) {
                 if (delta < 0)
                     section._propertiesEditor.startEditingLastProperty();
                 else
                     section.startEditingRuleSelector();
                 break;
             }

             index += delta;
         }
     }

     // Protected

     layout()
     {
         if (!this._shouldRefreshSubviews)
             return;

         this._shouldRefreshSubviews = false;

         let oldSections = this._sections.slice();
         let preservedSections = oldSections.filter((section) => {
             if (section[SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol] !== this.nodeStyles.node) {
                 section[SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol] = null;
                 section[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] = -1;
             }
             return section[SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol];
         });

         if (preservedSections.length) {
             for (let section of oldSections) {
                 if (!preservedSections.includes(section))
                     this.removeSubview(section);
             }
             for (let header of this._headerMap.values())
                 header.remove();
         } else
             this.removeAllSubviews();

         let previousStyle = null;
         let currentHeader = null;
         this._headerMap.clear();
         this._sections = [];

         let addHeader = (text, nodeOrPseudoId) => {
             currentHeader = this.element.appendChild(document.createElement("h2"));
             currentHeader.classList.add("section-header");
             currentHeader.append(text);

             if (nodeOrPseudoId) {
                 if (nodeOrPseudoId instanceof WI.DOMNode) {
                     currentHeader.append(" ", WI.linkifyNodeReference(nodeOrPseudoId, {
                         maxLength: 100,
                         excludeRevealElement: true,
                     }));
                 } else
                     currentHeader.append(" ", WI.CSSManager.displayNameForPseudoId(nodeOrPseudoId));
             }
         };

         let addSection = (section) => {
             if (section.style.inherited && (!previousStyle || previousStyle.node !== section.style.node))
                 addHeader(WI.UIString("Inherited From"), section.style.node);

             if (!section.isDescendantOf(this)) {
                 let referenceView = this.subviews[this._sections.length];
                 if (!referenceView || referenceView[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] === this._sections.length)
                     this.addSubview(section);
                 else
                     this.insertSubviewBefore(section, referenceView);
             }

             this._sections.push(section);
             section.needsLayout();

             if (currentHeader)
                 this._headerMap.set(section.style, currentHeader);

             previousStyle = section.style;
         };

         let createSection = (style) => {
             let section = style[SpreadsheetRulesStyleDetailsPanel.StyleSectionSymbol];
             if (!section) {
                 section = new WI.SpreadsheetCSSStyleDeclarationSection(this, style);
                 section.addEventListener(WI.SpreadsheetCSSStyleDeclarationSection.Event.FilterApplied, this._handleSectionFilterApplied, this);
                 section.addEventListener(WI.SpreadsheetCSSStyleDeclarationSection.Event.SelectorWillChange, this._handleSectionSelectorWillChange, this);
                 style[SpreadsheetRulesStyleDetailsPanel.StyleSectionSymbol] = section;
             }

             if (this._newRuleSelector === style.selectorText && style.enabledProperties.length === 0)
                 section.startEditingRuleSelector();

             addSection(section);

             let preservedSection = preservedSections.find((sectionToPreserve) => sectionToPreserve[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] === this._sections.length - 1);
             if (preservedSection)
                 addSection(preservedSection);
         };

         for (let style of this.nodeStyles.uniqueOrderedStyles)
             createSection(style);

         let beforePseudoId = null;
         let afterPseudoId = null;
         if (InspectorBackend.domains.CSS.PseudoId) {
             beforePseudoId = InspectorBackend.domains.CSS.PseudoId.Before;
             afterPseudoId = InspectorBackend.domains.CSS.PseudoId.After;
         } else {
             // Compatibility (iOS 12.2): CSS.PseudoId did not exist.
             beforePseudoId = 4;
             afterPseudoId = 5;
         }


         for (let [pseudoId, pseudoElementInfo] of this.nodeStyles.pseudoElements) {
             let pseudoElement = null;
             if (pseudoId === beforePseudoId)
                 pseudoElement = this.nodeStyles.node.beforePseudoElement();
             else if (pseudoId === afterPseudoId)
                 pseudoElement = this.nodeStyles.node.afterPseudoElement();
             addHeader(WI.UIString("Pseudo-Element"), pseudoElement || pseudoId);

             for (let style of WI.DOMNodeStyles.uniqueOrderedStyles(pseudoElementInfo.orderedStyles))
                 createSection(style);
         }

         this._newRuleSelector = null;

         this.element.append(this._emptyFilterResultsElement);

         if (this._filterText)
             this.applyFilter(this._filterText);
     }

     filterDidChange(filterBar)
     {
         super.filterDidChange(filterBar);

         this.applyFilter(filterBar.filters.text);
     }

     // Private

     _handleSectionFilterApplied(event)
     {
         if (!event.data.matches)
             return;

         this.element.classList.remove("filter-non-matching");

         let header = this._headerMap.get(event.target.style);
         if (header)
             header.classList.remove(WI.GeneralStyleDetailsSidebarPanel.NoFilterMatchInSectionClassName);
     }

     // Private

     _addNewRule(stylesheetId)
     {
         const justSelector = true;
         this._newRuleSelector = this.nodeStyles.node.appropriateSelectorFor(justSelector);

         const text = "";
         this.nodeStyles.addRule(this._newRuleSelector, text, stylesheetId);
     }

     _handleSectionSelectorWillChange(event)
     {
         let section = event.target;
         section[SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol] = this.nodeStyles.node;
         section[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] = this._sections.indexOf(section);
         console.assert(section[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] >= 0);
     }
 };

 WI.SpreadsheetRulesStyleDetailsPanel.StyleSectionSymbol = Symbol("style-section");
 WI.SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol = Symbol("style-showing-for-node");
 WI.SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol = Symbol("style-index");
	/*
	* Copyright (C) 2017 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	WI.SpreadsheetRulesStyleDetailsPanel = class SpreadsheetRulesStyleDetailsPanel extends WI.StyleDetailsPanel
	{
	constructor(delegate)
	{
	const className = "rules";
	const identifier = "rules";
	const label = WI.UIString("Styles \u2014 Rules");
	super(delegate, className, identifier, label);

	// Make the styles sidebar always left-to-right since CSS is strictly an LTR language.
	this.element.dir = "ltr";

	this._headerMap = new Map;
	this._sections = [];
	this._newRuleSelector = null;
	this._ruleMediaAndInherticanceList = [];
	this._propertyToSelectAndHighlight = null;
	this._filterText = null;
	this._shouldRefreshSubviews = false;

	this._emptyFilterResultsElement = WI.createMessageTextView(WI.UIString("No Results Found"));
	}

	// Public

	refresh(significantChange)
	{
	// We only need to do a rebuild on significant changes. Other changes are handled
	// by the sections and text editors themselves.
	if (significantChange) {
	this._shouldRefreshSubviews = true;
	this.needsLayout();
	}

	super.refresh(significantChange);
	}

	hidden()
	{
	for (let section of this._sections)
	section.hidden();

	super.hidden();
	}

	scrollToSectionAndHighlightProperty(property)
	{
	if (!this._visible) {
	this._propertyToSelectAndHighlight = property;
	return;
	}

	for (let section of this._sections) {
	if (section.highlightProperty(property))
	return;
	}
	}

	nodeStylesRefreshed(event)
	{
	super.nodeStylesRefreshed(event);

	if (this._propertyToSelectAndHighlight) {
	this.scrollToSectionAndHighlightProperty(this._propertyToSelectAndHighlight);
	this._propertyToSelectAndHighlight = null;
	}
	}

	newRuleButtonClicked()
	{
	if (this.nodeStyles.node.isInUserAgentShadowTree())
	return;

	this._addNewRule();
	}

	newRuleButtonContextMenu(event)
	{
	if (this.nodeStyles.node.isInUserAgentShadowTree())
	return;

	let styleSheets = WI.cssManager.styleSheets.filter(styleSheet => styleSheet.hasInfo() && !styleSheet.isInlineStyleTag() && !styleSheet.isInlineStyleAttributeStyleSheet());
	if (!styleSheets.length)
	return;

	let contextMenu = WI.ContextMenu.createFromEvent(event);

	const handler = null;
	const disabled = true;
	contextMenu.appendItem(WI.UIString("Available Style Sheets"), handler, disabled);

	let [inspectorStyleSheets, regularStyleSheets] = styleSheets.partition(styleSheet => styleSheet.isInspectorStyleSheet());
	console.assert(inspectorStyleSheets.length <= 1, "There should never be more than one inspector style sheet");

	contextMenu.appendItem(WI.UIString("Inspector Style Sheet"), () => {
	this._addNewRule(inspectorStyleSheets.length ? inspectorStyleSheets[0].id : null);
	});

	for (let styleSheet of regularStyleSheets) {
	contextMenu.appendItem(styleSheet.displayName, () => {
	this._addNewRule(styleSheet.id);
	});
	}
	}

	applyFilter(filterText)
	{
	this._filterText = filterText;

	if (!this.didInitialLayout)
	return;

	if (this._filterText)
	this.element.classList.add("filter-non-matching");

	for (let header of this._headerMap.values())
	header.classList.add(WI.GeneralStyleDetailsSidebarPanel.NoFilterMatchInSectionClassName);

	for (let section of this._sections)
	section.applyFilter(this._filterText);
	}

	focusFirstSection()
	{
	this.spreadsheetCSSStyleDeclarationSectionStartEditingAdjacentRule(null, 1);
	}

	focusLastSection()
	{
	this.spreadsheetCSSStyleDeclarationSectionStartEditingAdjacentRule(null, -1);
	}

	// SpreadsheetCSSStyleDeclarationSection delegate

	spreadsheetCSSStyleDeclarationSectionSelectProperty(property)
	{
	this.scrollToSectionAndHighlightProperty(property);
	}

	spreadsheetCSSStyleDeclarationSectionStartEditingAdjacentRule(currentSection, delta)
	{
	console.assert(delta !== 0);

	let index = this._sections.indexOf(currentSection);
	if (index < 0) {
	if (delta < 0)
	index = this._sections.length;
	else if (delta > 0)
	index = -1;
	}
	index += delta;

	while (this._sections[index] !== currentSection) {
	if (index < 0) {
	if (this._delegate && this._delegate.styleDetailsPanelFocusLastPseudoClassCheckbox) {
	this._delegate.styleDetailsPanelFocusLastPseudoClassCheckbox(this);
	break;
	}

	index = this._sections.length - 1;
	} else if (index >= this._sections.length) {
	if (this._delegate && this._delegate.styleDetailsPanelFocusFilterBar) {
	this._delegate.styleDetailsPanelFocusFilterBar(this);
	break;
	}

	index = 0;
	}

	let section = this._sections[index];
	if (section.editable) {
	if (delta < 0)
	section._propertiesEditor.startEditingLastProperty();
	else
	section.startEditingRuleSelector();
	break;
	}

	index += delta;
	}
	}

	// Protected

	layout()
	{
	if (!this._shouldRefreshSubviews)
	return;

	this._shouldRefreshSubviews = false;

	let oldSections = this._sections.slice();
	let preservedSections = oldSections.filter((section) => {
	if (section[SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol] !== this.nodeStyles.node) {
	section[SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol] = null;
	section[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] = -1;
	}
	return section[SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol];
	});

	if (preservedSections.length) {
	for (let section of oldSections) {
	if (!preservedSections.includes(section))
	this.removeSubview(section);
	}
	for (let header of this._headerMap.values())
	header.remove();
	} else
	this.removeAllSubviews();

	let previousStyle = null;
	let currentHeader = null;
	this._headerMap.clear();
	this._sections = [];

	let addHeader = (text, nodeOrPseudoId) => {
	currentHeader = this.element.appendChild(document.createElement("h2"));
	currentHeader.classList.add("section-header");
	currentHeader.append(text);

	if (nodeOrPseudoId) {
	if (nodeOrPseudoId instanceof WI.DOMNode) {
	currentHeader.append(" ", WI.linkifyNodeReference(nodeOrPseudoId, {
	maxLength: 100,
	excludeRevealElement: true,
	}));
	} else
	currentHeader.append(" ", WI.CSSManager.displayNameForPseudoId(nodeOrPseudoId));
	}
	};

	let addSection = (section) => {
	if (section.style.inherited && (!previousStyle \|\| previousStyle.node !== section.style.node))
	addHeader(WI.UIString("Inherited From"), section.style.node);

	if (!section.isDescendantOf(this)) {
	let referenceView = this.subviews[this._sections.length];
	if (!referenceView \|\| referenceView[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] === this._sections.length)
	this.addSubview(section);
	else
	this.insertSubviewBefore(section, referenceView);
	}

	this._sections.push(section);
	section.needsLayout();

	if (currentHeader)
	this._headerMap.set(section.style, currentHeader);

	previousStyle = section.style;
	};

	let createSection = (style) => {
	let section = style[SpreadsheetRulesStyleDetailsPanel.StyleSectionSymbol];
	if (!section) {
	section = new WI.SpreadsheetCSSStyleDeclarationSection(this, style);
	section.addEventListener(WI.SpreadsheetCSSStyleDeclarationSection.Event.FilterApplied, this._handleSectionFilterApplied, this);
	section.addEventListener(WI.SpreadsheetCSSStyleDeclarationSection.Event.SelectorWillChange, this._handleSectionSelectorWillChange, this);
	style[SpreadsheetRulesStyleDetailsPanel.StyleSectionSymbol] = section;
	}

	if (this._newRuleSelector === style.selectorText && style.enabledProperties.length === 0)
	section.startEditingRuleSelector();

	addSection(section);

	let preservedSection = preservedSections.find((sectionToPreserve) => sectionToPreserve[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] === this._sections.length - 1);
	if (preservedSection)
	addSection(preservedSection);
	};

	for (let style of this.nodeStyles.uniqueOrderedStyles)
	createSection(style);

	let beforePseudoId = null;
	let afterPseudoId = null;
	if (InspectorBackend.domains.CSS.PseudoId) {
	beforePseudoId = InspectorBackend.domains.CSS.PseudoId.Before;
	afterPseudoId = InspectorBackend.domains.CSS.PseudoId.After;
	} else {
	// Compatibility (iOS 12.2): CSS.PseudoId did not exist.
	beforePseudoId = 4;
	afterPseudoId = 5;
	}


	for (let [pseudoId, pseudoElementInfo] of this.nodeStyles.pseudoElements) {
	let pseudoElement = null;
	if (pseudoId === beforePseudoId)
	pseudoElement = this.nodeStyles.node.beforePseudoElement();
	else if (pseudoId === afterPseudoId)
	pseudoElement = this.nodeStyles.node.afterPseudoElement();
	addHeader(WI.UIString("Pseudo-Element"), pseudoElement \|\| pseudoId);

	for (let style of WI.DOMNodeStyles.uniqueOrderedStyles(pseudoElementInfo.orderedStyles))
	createSection(style);
	}

	this._newRuleSelector = null;

	this.element.append(this._emptyFilterResultsElement);

	if (this._filterText)
	this.applyFilter(this._filterText);
	}

	filterDidChange(filterBar)
	{
	super.filterDidChange(filterBar);

	this.applyFilter(filterBar.filters.text);
	}

	// Private

	_handleSectionFilterApplied(event)
	{
	if (!event.data.matches)
	return;

	this.element.classList.remove("filter-non-matching");

	let header = this._headerMap.get(event.target.style);
	if (header)
	header.classList.remove(WI.GeneralStyleDetailsSidebarPanel.NoFilterMatchInSectionClassName);
	}

	// Private

	_addNewRule(stylesheetId)
	{
	const justSelector = true;
	this._newRuleSelector = this.nodeStyles.node.appropriateSelectorFor(justSelector);

	const text = "";
	this.nodeStyles.addRule(this._newRuleSelector, text, stylesheetId);
	}

	_handleSectionSelectorWillChange(event)
	{
	let section = event.target;
	section[SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol] = this.nodeStyles.node;
	section[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] = this._sections.indexOf(section);
	console.assert(section[SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol] >= 0);
	}
	};

	WI.SpreadsheetRulesStyleDetailsPanel.StyleSectionSymbol = Symbol("style-section");
	WI.SpreadsheetRulesStyleDetailsPanel.SectionShowingForNodeSymbol = Symbol("style-showing-for-node");
	WI.SpreadsheetRulesStyleDetailsPanel.SectionIndexSymbol = Symbol("style-index");