DevTools: kill WebInspector.SectionCascade class

third_party/WebKit/Source/devtools/front_end/elements/StylesSectionModel.js

-// Copyright (c) 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @constructor
- * @param {!WebInspector.CSSStyleModel.MatchedStyleResult} matchedStyles
- * @param {!Array<!WebInspector.CSSStyleDeclaration>} styles
- */
-WebInspector.SectionCascade = function(matchedStyles, styles)
-{
-    this._matchedStyles = matchedStyles;
-    this._styles = styles;
-    this.resetActiveProperties();
-}
-
-/**
- * @param {!WebInspector.CSSStyleModel.MatchedStyleResult} matchedStyles
- * @return {!{matched: !WebInspector.SectionCascade, pseudo: !Map.<number, !WebInspector.SectionCascade>}}
- */
-WebInspector.SectionCascade.fromMatchedStyles = function(matchedStyles)
-{
-    var matched = new WebInspector.SectionCascade(matchedStyles, matchedStyles.nodeStyles());
-    var pseudo = new Map();
-
-    var pseudoStyles = matchedStyles.pseudoStyles();
-    var pseudoElements = pseudoStyles.keysArray();
-    for (var i = 0; i < pseudoElements.length; ++i) {
-        var pseudoElement = pseudoElements[i];
-        var pseudoCascade = new WebInspector.SectionCascade(matchedStyles, /** @type {!Array<!WebInspector.CSSStyleDeclaration>} */(pseudoStyles.get(pseudoElement)));
-        pseudo.set(pseudoElement, pseudoCascade);
-    }
-
-    return {
-        matched: matched,
-        pseudo: pseudo
-    };
-}
-
-WebInspector.SectionCascade.prototype = {
-    /**
-     * @param {!WebInspector.CSSStyleDeclaration} style
-     * @return {boolean}
-     */
-    hasMatchingSelectors: function(style)
-    {
-        return style.parentRule ? style.parentRule.matchingSelectors && style.parentRule.matchingSelectors.length > 0 && this.mediaMatches(style) : true;
-    },
-
-    /**
-     * @param {!WebInspector.CSSStyleDeclaration} style
-     * @return {boolean}
-     */
-    mediaMatches: function(style)
-    {
-        var media = style.parentRule ? style.parentRule.media : [];
-        for (var i = 0; media && i < media.length; ++i) {
-            if (!media[i].active())
-                return false;
-        }
-        return true;
-    },
-
-    /**
-     * @param {!WebInspector.CSSStyleDeclaration} style
-     * @return {?WebInspector.DOMNode}
-     */
-    nodeForStyle: function(style)
-    {
-        return this._matchedStyles.nodeForStyle(style);
-    },
-
-    /**
-     * @param {!WebInspector.CSSStyleDeclaration} style
-     * @return {boolean}
-     */
-    isInherited: function(style)
-    {
-        return this._matchedStyles.isInherited(style);
-    },
-
-    /**
-     * @return {!Array.<!WebInspector.CSSStyleDeclaration>}
-     */
-    styles: function()
-    {
-        return this._styles;
-    },
-
-    /**
-     * @param {!WebInspector.CSSProperty} property
-     * @return {?WebInspector.SectionCascade.PropertyState}
-     */
-    propertyState: function(property)
-    {
-        if (this._propertiesState.size === 0)
-            this._propertiesState = this._computeActiveProperties();
-        return this._propertiesState.get(property) || null;
-    },
-
-    resetActiveProperties: function()
-    {
-        /** @type {!Map<!WebInspector.CSSProperty, !WebInspector.SectionCascade.PropertyState>} */
-        this._propertiesState = new Map();
-    },
-
-    /**
-     * @return {!Map<!WebInspector.CSSProperty, !WebInspector.SectionCascade.PropertyState>}
-     */
-    _computeActiveProperties: function()
-    {
-        /** @type {!Set.<string>} */
-        var foundImportantProperties = new Set();
-        /** @type {!Map.<string, !Map<string, !WebInspector.CSSProperty>>} */
-        var propertyToEffectiveRule = new Map();
-        /** @type {!Map.<string, !WebInspector.DOMNode>} */
-        var inheritedPropertyToNode = new Map();
-        /** @type {!Set<string>} */
-        var allUsedProperties = new Set();
-        var result = new Map();
-        for (var i = 0; i < this._styles.length; ++i) {
-            var style = this._styles[i];
-            if (!this.hasMatchingSelectors(style))
-                continue;
-
-            /** @type {!Map<string, !WebInspector.CSSProperty>} */
-            var styleActiveProperties = new Map();
-            var allProperties = style.allProperties;
-            for (var j = 0; j < allProperties.length; ++j) {
-                var property = allProperties[j];
-
-                // Do not pick non-inherited properties from inherited styles.
-                var inherited = this._matchedStyles.isInherited(style);
-                if (inherited && !WebInspector.CSSMetadata.isPropertyInherited(property.name))
-                    continue;
-
-                if (!property.activeInStyle()) {
-                    result.set(property, WebInspector.SectionCascade.PropertyState.Overloaded);
-                    continue;
-                }
-
-                var canonicalName = WebInspector.CSSMetadata.canonicalPropertyName(property.name);
-                if (foundImportantProperties.has(canonicalName)) {
-                    result.set(property, WebInspector.SectionCascade.PropertyState.Overloaded);
-                    continue;
-                }
-
-                if (!property.important && allUsedProperties.has(canonicalName)) {
-                    result.set(property, WebInspector.SectionCascade.PropertyState.Overloaded);
-                    continue;
-                }
-
-                var isKnownProperty = propertyToEffectiveRule.has(canonicalName);
-                var inheritedFromNode = inherited ? this._matchedStyles.nodeForStyle(style) : null;
-                if (!isKnownProperty && inheritedFromNode && !inheritedPropertyToNode.has(canonicalName))
-                    inheritedPropertyToNode.set(canonicalName, inheritedFromNode);
-
-                if (property.important) {
-                    if (inherited && isKnownProperty && inheritedFromNode !== inheritedPropertyToNode.get(canonicalName)) {
-                        result.set(property, WebInspector.SectionCascade.PropertyState.Overloaded);
-                        continue;
-                    }
-
-                    foundImportantProperties.add(canonicalName);
-                    if (isKnownProperty) {
-                        var overloaded = propertyToEffectiveRule.get(canonicalName).get(canonicalName);
-                        result.set(overloaded, WebInspector.SectionCascade.PropertyState.Overloaded);
-                        propertyToEffectiveRule.get(canonicalName).delete(canonicalName);
-                    }
-                }
-
-                styleActiveProperties.set(canonicalName, property);
-                allUsedProperties.add(canonicalName);
-                propertyToEffectiveRule.set(canonicalName, styleActiveProperties);
-                result.set(property, WebInspector.SectionCascade.PropertyState.Active);
-            }
-
-            // If every longhand of the shorthand is not active, then the shorthand is not active too.
-            for (var property of style.leadingProperties()) {
-                var canonicalName = WebInspector.CSSMetadata.canonicalPropertyName(property.name);
-                if (!styleActiveProperties.has(canonicalName))
-                    continue;
-                var longhands = style.longhandProperties(property.name);
-                if (!longhands.length)
-                    continue;
-                var notUsed = true;
-                for (var longhand of longhands) {
-                    var longhandCanonicalName = WebInspector.CSSMetadata.canonicalPropertyName(longhand.name);
-                    notUsed = notUsed && !styleActiveProperties.has(longhandCanonicalName);
-                }
-                if (!notUsed)
-                    continue;
-                styleActiveProperties.delete(canonicalName);
-                allUsedProperties.delete(canonicalName);
-                result.set(property, WebInspector.SectionCascade.PropertyState.Overloaded);
-            }
-        }
-        return result;
-    }
-}
-
-/** @enum {string} */
-WebInspector.SectionCascade.PropertyState = {
-    Active: "Active",
-    Overloaded: "Overloaded"
-}