mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/toolkit/devtools/styleinspector/css-logic.js

1943 строки
56 KiB
JavaScript
Исходник Ответственный История

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* About the objects defined in this file:
* - CssLogic contains style information about a view context. It provides
* access to 2 sets of objects: Css[Sheet|Rule|Selector] provide access to
* information that does not change when the selected element changes while
* Css[Property|Selector]Info provide information that is dependent on the
* selected element.
* Its key methods are highlight(), getPropertyInfo() and forEachSheet(), etc
* It also contains a number of static methods for l10n, naming, etc
*
* - CssSheet provides a more useful API to a DOM CSSSheet for our purposes,
* including shortSource and href.
* - CssRule a more useful API to a nsIDOMCSSRule including access to the group
* of CssSelectors that the rule provides properties for
* - CssSelector A single selector - i.e. not a selector group. In other words
* a CssSelector does not contain ','. This terminology is different from the
* standard DOM API, but more inline with the definition in the spec.
*
* - CssPropertyInfo contains style information for a single property for the
* highlighted element.
* - CssSelectorInfo is a wrapper around CssSelector, which adds sorting with
* reference to the selected element.
*/
/**
* Provide access to the style information in a page.
* CssLogic uses the standard DOM API, and the Gecko inIDOMUtils API to access
* styling information in the page, and present this to the user in a way that
* helps them understand:
* - why their expectations may not have been fulfilled
* - how browsers process CSS
* @constructor
*/
const { Cc, Ci, Cu } = require("chrome");
const Services = require("Services");
const DevToolsUtils = require("devtools/toolkit/DevToolsUtils");
const RX_UNIVERSAL_SELECTOR = /\s*\*\s*/g;
const RX_NOT = /:not\((.*?)\)/g;
const RX_PSEUDO_CLASS_OR_ELT = /(:[\w-]+\().*?\)/g;
const RX_CONNECTORS = /\s*[\s>+~]\s*/g;
const RX_ID = /\s*#\w+\s*/g;
const RX_CLASS_OR_ATTRIBUTE = /\s*(?:\.\w+|\[.+?\])\s*/g;
const RX_PSEUDO = /\s*:?:([\w-]+)(\(?\)?)\s*/g;
// This should be ok because none of the functions that use this should be used
// on the worker thread, where Cu is not available.
if (Cu) {
Cu.importGlobalProperties(['CSS']);
Cu.import("resource://gre/modules/devtools/LayoutHelpers.jsm");
}
function CssLogic()
{
// The cache of examined CSS properties.
_propertyInfos: {};
}
exports.CssLogic = CssLogic;
/**
* Special values for filter, in addition to an href these values can be used
*/
CssLogic.FILTER = {
USER: "user", // show properties for all user style sheets.
UA: "ua", // USER, plus user-agent (i.e. browser) style sheets
};
/**
* Known media values. To distinguish "all" stylesheets (above) from "all" media
* The full list includes braille, embossed, handheld, print, projection,
* speech, tty, and tv, but this is only a hack because these are not defined
* in the DOM at all.
* @see http://www.w3.org/TR/CSS21/media.html#media-types
*/
CssLogic.MEDIA = {
ALL: "all",
SCREEN: "screen",
};
/**
* Each rule has a status, the bigger the number, the better placed it is to
* provide styling information.
*
* These statuses are localized inside the styleinspector.properties string bundle.
* @see csshtmltree.js RuleView._cacheStatusNames()
*/
CssLogic.STATUS = {
BEST: 3,
MATCHED: 2,
PARENT_MATCH: 1,
UNMATCHED: 0,
UNKNOWN: -1,
};
CssLogic.prototype = {
// Both setup by highlight().
viewedElement: null,
viewedDocument: null,
// The cache of the known sheets.
_sheets: null,
// Have the sheets been cached?
_sheetsCached: false,
// The total number of rules, in all stylesheets, after filtering.
_ruleCount: 0,
// The computed styles for the viewedElement.
_computedStyle: null,
// Source filter. Only display properties coming from the given source
_sourceFilter: CssLogic.FILTER.USER,
// Used for tracking unique CssSheet/CssRule/CssSelector objects, in a run of
// processMatchedSelectors().
_passId: 0,
// Used for tracking matched CssSelector objects.
_matchId: 0,
_matchedRules: null,
_matchedSelectors: null,
// Cached keyframes rules in all stylesheets
_keyframesRules: null,
/**
* Reset various properties
*/
reset: function CssLogic_reset()
{
this._propertyInfos = {};
this._ruleCount = 0;
this._sheetIndex = 0;
this._sheets = {};
this._sheetsCached = false;
this._matchedRules = null;
this._matchedSelectors = null;
this._keyframesRules = [];
},
/**
* Focus on a new element - remove the style caches.
*
* @param {nsIDOMElement} aViewedElement the element the user has highlighted
* in the Inspector.
*/
highlight: function CssLogic_highlight(aViewedElement)
{
if (!aViewedElement) {
this.viewedElement = null;
this.viewedDocument = null;
this._computedStyle = null;
this.reset();
return;
}
if (aViewedElement === this.viewedElement) {
return;
}
this.viewedElement = aViewedElement;
let doc = this.viewedElement.ownerDocument;
if (doc != this.viewedDocument) {
// New document: clear/rebuild the cache.
this.viewedDocument = doc;
// Hunt down top level stylesheets, and cache them.
this._cacheSheets();
} else {
// Clear cached data in the CssPropertyInfo objects.
this._propertyInfos = {};
}
this._matchedRules = null;
this._matchedSelectors = null;
this._computedStyle = CssLogic.getComputedStyle(this.viewedElement);
},
/**
* Get the values of all the computed CSS properties for the highlighted
* element.
* @returns {object} The computed CSS properties for a selected element
*/
get computedStyle() {
return this._computedStyle;
},
/**
* Get the source filter.
* @returns {string} The source filter being used.
*/
get sourceFilter() {
return this._sourceFilter;
},
/**
* Source filter. Only display properties coming from the given source (web
* address). Note that in order to avoid information overload we DO NOT show
* unmatched system rules.
* @see CssLogic.FILTER.*
*/
set sourceFilter(aValue) {
let oldValue = this._sourceFilter;
this._sourceFilter = aValue;
let ruleCount = 0;
// Update the CssSheet objects.
this.forEachSheet(function(aSheet) {
aSheet._sheetAllowed = -1;
if (aSheet.contentSheet && aSheet.sheetAllowed) {
ruleCount += aSheet.ruleCount;
}
}, this);
this._ruleCount = ruleCount;
// Full update is needed because the this.processMatchedSelectors() method
// skips UA stylesheets if the filter does not allow such sheets.
let needFullUpdate = (oldValue == CssLogic.FILTER.UA ||
aValue == CssLogic.FILTER.UA);
if (needFullUpdate) {
this._matchedRules = null;
this._matchedSelectors = null;
this._propertyInfos = {};
} else {
// Update the CssPropertyInfo objects.
for each (let propertyInfo in this._propertyInfos) {
propertyInfo.needRefilter = true;
}
}
},
/**
* Return a CssPropertyInfo data structure for the currently viewed element
* and the specified CSS property. If there is no currently viewed element we
* return an empty object.
*
* @param {string} aProperty The CSS property to look for.
* @return {CssPropertyInfo} a CssPropertyInfo structure for the given
* property.
*/
getPropertyInfo: function CssLogic_getPropertyInfo(aProperty)
{
if (!this.viewedElement) {
return {};
}
let info = this._propertyInfos[aProperty];
if (!info) {
info = new CssPropertyInfo(this, aProperty);
this._propertyInfos[aProperty] = info;
}
return info;
},
/**
* Cache all the stylesheets in the inspected document
* @private
*/
_cacheSheets: function CssLogic_cacheSheets()
{
this._passId++;
this.reset();
// styleSheets isn't an array, but forEach can work on it anyway
Array.prototype.forEach.call(this.viewedDocument.styleSheets,
this._cacheSheet, this);
this._sheetsCached = true;
},
/**
* Cache a stylesheet if it falls within the requirements: if it's enabled,
* and if the @media is allowed. This method also walks through the stylesheet
* cssRules to find @imported rules, to cache the stylesheets of those rules
* as well. In addition, the @keyframes rules in the stylesheet are cached.
*
* @private
* @param {CSSStyleSheet} aDomSheet the CSSStyleSheet object to cache.
*/
_cacheSheet: function CssLogic_cacheSheet(aDomSheet)
{
if (aDomSheet.disabled) {
return;
}
// Only work with stylesheets that have their media allowed.
if (!this.mediaMatches(aDomSheet)) {
return;
}
// Cache the sheet.
let cssSheet = this.getSheet(aDomSheet, this._sheetIndex++);
if (cssSheet._passId != this._passId) {
cssSheet._passId = this._passId;
// Find import and keyframes rules.
for (let aDomRule of aDomSheet.cssRules) {
if (aDomRule.type == Ci.nsIDOMCSSRule.IMPORT_RULE && aDomRule.styleSheet &&
this.mediaMatches(aDomRule)) {
this._cacheSheet(aDomRule.styleSheet);
} else if (aDomRule.type == Ci.nsIDOMCSSRule.KEYFRAMES_RULE) {
this._keyframesRules.push(aDomRule);
}
}
}
},
/**
* Retrieve the list of stylesheets in the document.
*
* @return {array} the list of stylesheets in the document.
*/
get sheets()
{
if (!this._sheetsCached) {
this._cacheSheets();
}
let sheets = [];
this.forEachSheet(function (aSheet) {
if (aSheet.contentSheet) {
sheets.push(aSheet);
}
}, this);
return sheets;
},
/**
* Retrieve the list of keyframes rules in the document.
*
* @ return {array} the list of keyframes rules in the document.
*/
get keyframesRules()
{
if (!this._sheetsCached) {
this._cacheSheets();
}
return this._keyframesRules;
},
/**
* Retrieve a CssSheet object for a given a CSSStyleSheet object. If the
* stylesheet is already cached, you get the existing CssSheet object,
* otherwise the new CSSStyleSheet object is cached.
*
* @param {CSSStyleSheet} aDomSheet the CSSStyleSheet object you want.
* @param {number} aIndex the index, within the document, of the stylesheet.
*
* @return {CssSheet} the CssSheet object for the given CSSStyleSheet object.
*/
getSheet: function CL_getSheet(aDomSheet, aIndex)
{
let cacheId = "";
if (aDomSheet.href) {
cacheId = aDomSheet.href;
} else if (aDomSheet.ownerNode && aDomSheet.ownerNode.ownerDocument) {
cacheId = aDomSheet.ownerNode.ownerDocument.location;
}
let sheet = null;
let sheetFound = false;
if (cacheId in this._sheets) {
for (let i = 0, numSheets = this._sheets[cacheId].length; i < numSheets; i++) {
sheet = this._sheets[cacheId][i];
if (sheet.domSheet === aDomSheet) {
if (aIndex != -1) {
sheet.index = aIndex;
}
sheetFound = true;
break;
}
}
}
if (!sheetFound) {
if (!(cacheId in this._sheets)) {
this._sheets[cacheId] = [];
}
sheet = new CssSheet(this, aDomSheet, aIndex);
if (sheet.sheetAllowed && sheet.contentSheet) {
this._ruleCount += sheet.ruleCount;
}
this._sheets[cacheId].push(sheet);
}
return sheet;
},
/**
* Process each cached stylesheet in the document using your callback.
*
* @param {function} aCallback the function you want executed for each of the
* CssSheet objects cached.
* @param {object} aScope the scope you want for the callback function. aScope
* will be the this object when aCallback executes.
*/
forEachSheet: function CssLogic_forEachSheet(aCallback, aScope)
{
for each (let sheets in this._sheets) {
for (let i = 0; i < sheets.length; i ++) {
// We take this as an opportunity to clean dead sheets
try {
let sheet = sheets[i];
sheet.domSheet; // If accessing domSheet raises an exception, then the
// style sheet is a dead object
aCallback.call(aScope, sheet, i, sheets);
} catch (e) {
sheets.splice(i, 1);
i --;
}
}
}
},
/**
* Process *some* cached stylesheets in the document using your callback. The
* callback function should return true in order to halt processing.
*
* @param {function} aCallback the function you want executed for some of the
* CssSheet objects cached.
* @param {object} aScope the scope you want for the callback function. aScope
* will be the this object when aCallback executes.
* @return {Boolean} true if aCallback returns true during any iteration,
* otherwise false is returned.
*/
forSomeSheets: function CssLogic_forSomeSheets(aCallback, aScope)
{
for each (let sheets in this._sheets) {
if (sheets.some(aCallback, aScope)) {
return true;
}
}
return false;
},
/**
* Get the number nsIDOMCSSRule objects in the document, counted from all of
* the stylesheets. System sheets are excluded. If a filter is active, this
* tells only the number of nsIDOMCSSRule objects inside the selected
* CSSStyleSheet.
*
* WARNING: This only provides an estimate of the rule count, and the results
* could change at a later date. Todo remove this
*
* @return {number} the number of nsIDOMCSSRule (all rules).
*/
get ruleCount()
{
if (!this._sheetsCached) {
this._cacheSheets();
}
return this._ruleCount;
},
/**
* Process the CssSelector objects that match the highlighted element and its
* parent elements. aScope.aCallback() is executed for each CssSelector
* object, being passed the CssSelector object and the match status.
*
* This method also includes all of the element.style properties, for each
* highlighted element parent and for the highlighted element itself.
*
* Note that the matched selectors are cached, such that next time your
* callback is invoked for the cached list of CssSelector objects.
*
* @param {function} aCallback the function you want to execute for each of
* the matched selectors.
* @param {object} aScope the scope you want for the callback function. aScope
* will be the this object when aCallback executes.
*/
processMatchedSelectors: function CL_processMatchedSelectors(aCallback, aScope)
{
if (this._matchedSelectors) {
if (aCallback) {
this._passId++;
this._matchedSelectors.forEach(function(aValue) {
aCallback.call(aScope, aValue[0], aValue[1]);
aValue[0].cssRule._passId = this._passId;
}, this);
}
return;
}
if (!this._matchedRules) {
this._buildMatchedRules();
}
this._matchedSelectors = [];
this._passId++;
for (let i = 0; i < this._matchedRules.length; i++) {
let rule = this._matchedRules[i][0];
let status = this._matchedRules[i][1];
rule.selectors.forEach(function (aSelector) {
if (aSelector._matchId !== this._matchId &&
(aSelector.elementStyle ||
this.selectorMatchesElement(rule.domRule, aSelector.selectorIndex))) {
aSelector._matchId = this._matchId;
this._matchedSelectors.push([ aSelector, status ]);
if (aCallback) {
aCallback.call(aScope, aSelector, status);
}
}
}, this);
rule._passId = this._passId;
}
},
/**
* Check if the given selector matches the highlighted element or any of its
* parents.
*
* @private
* @param {DOMRule} domRule
* The DOM Rule containing the selector.
* @param {Number} idx
* The index of the selector within the DOMRule.
* @return {boolean}
* true if the given selector matches the highlighted element or any
* of its parents, otherwise false is returned.
*/
selectorMatchesElement: function CL_selectorMatchesElement2(domRule, idx)
{
let element = this.viewedElement;
do {
if (domUtils.selectorMatchesElement(element, domRule, idx)) {
return true;
}
} while ((element = element.parentNode) &&
element.nodeType === Ci.nsIDOMNode.ELEMENT_NODE);
return false;
},
/**
* Check if the highlighted element or it's parents have matched selectors.
*
* @param {array} aProperties The list of properties you want to check if they
* have matched selectors or not.
* @return {object} An object that tells for each property if it has matched
* selectors or not. Object keys are property names and values are booleans.
*/
hasMatchedSelectors: function CL_hasMatchedSelectors(aProperties)
{
if (!this._matchedRules) {
this._buildMatchedRules();
}
let result = {};
this._matchedRules.some(function(aValue) {
let rule = aValue[0];
let status = aValue[1];
aProperties = aProperties.filter((aProperty) => {
// We just need to find if a rule has this property while it matches
// the viewedElement (or its parents).
if (rule.getPropertyValue(aProperty) &&
(status == CssLogic.STATUS.MATCHED ||
(status == CssLogic.STATUS.PARENT_MATCH &&
domUtils.isInheritedProperty(aProperty)))) {
result[aProperty] = true;
return false;
}
return true; // Keep the property for the next rule.
});
return aProperties.length == 0;
}, this);
return result;
},
/**
* Build the array of matched rules for the currently highlighted element.
* The array will hold rules that match the viewedElement and its parents.
*
* @private
*/
_buildMatchedRules: function CL__buildMatchedRules()
{
let domRules;
let element = this.viewedElement;
let filter = this.sourceFilter;
let sheetIndex = 0;
this._matchId++;
this._passId++;
this._matchedRules = [];
if (!element) {
return;
}
do {
let status = this.viewedElement === element ?
CssLogic.STATUS.MATCHED : CssLogic.STATUS.PARENT_MATCH;
try {
// Handle finding rules on pseudo by reading style rules
// on the parent node with proper pseudo arg to getCSSStyleRules.
let {bindingElement, pseudo} = CssLogic.getBindingElementAndPseudo(element);
domRules = domUtils.getCSSStyleRules(bindingElement, pseudo);
} catch (ex) {
Services.console.
logStringMessage("CL__buildMatchedRules error: " + ex);
continue;
}
// getCSSStyleRules can return null with a shadow DOM element.
let numDomRules = domRules ? domRules.Count() : 0;
for (let i = 0; i < numDomRules; i++) {
let domRule = domRules.GetElementAt(i);
if (domRule.type !== Ci.nsIDOMCSSRule.STYLE_RULE) {
continue;
}
let sheet = this.getSheet(domRule.parentStyleSheet, -1);
if (sheet._passId !== this._passId) {
sheet.index = sheetIndex++;
sheet._passId = this._passId;
}
if (filter === CssLogic.FILTER.USER && !sheet.contentSheet) {
continue;
}
let rule = sheet.getRule(domRule);
if (rule._passId === this._passId) {
continue;
}
rule._matchId = this._matchId;
rule._passId = this._passId;
this._matchedRules.push([rule, status]);
}
// Add element.style information.
if (element.style && element.style.length > 0) {
let rule = new CssRule(null, { style: element.style }, element);
rule._matchId = this._matchId;
rule._passId = this._passId;
this._matchedRules.push([rule, status]);
}
} while ((element = element.parentNode) &&
element.nodeType === Ci.nsIDOMNode.ELEMENT_NODE);
},
/**
* Tells if the given DOM CSS object matches the current view media.
*
* @param {object} aDomObject The DOM CSS object to check.
* @return {boolean} True if the DOM CSS object matches the current view
* media, or false otherwise.
*/
mediaMatches: function CL_mediaMatches(aDomObject)
{
let mediaText = aDomObject.media.mediaText;
return !mediaText || this.viewedDocument.defaultView.
matchMedia(mediaText).matches;
},
};
/**
* If the element has an id, return '#id'. Otherwise return 'tagname[n]' where
* n is the index of this element in its siblings.
* <p>A technically more 'correct' output from the no-id case might be:
* 'tagname:nth-of-type(n)' however this is unlikely to be more understood
* and it is longer.
*
* @param {nsIDOMElement} aElement the element for which you want the short name.
* @return {string} the string to be displayed for aElement.
*/
CssLogic.getShortName = function CssLogic_getShortName(aElement)
{
if (!aElement) {
return "null";
}
if (aElement.id) {
return "#" + aElement.id;
}
let priorSiblings = 0;
let temp = aElement;
while ((temp = temp.previousElementSibling)) {
priorSiblings++;
}
return aElement.tagName + "[" + priorSiblings + "]";
};
/**
* Get an array of short names from the given element to document.body.
*
* @param {nsIDOMElement} aElement the element for which you want the array of
* short names.
* @return {array} The array of elements.
* <p>Each element is an object of the form:
* <ul>
* <li>{ display: "what to display for the given (parent) element",
* <li> element: referenceToTheElement }
* </ul>
*/
CssLogic.getShortNamePath = function CssLogic_getShortNamePath(aElement)
{
let doc = aElement.ownerDocument;
let reply = [];
if (!aElement) {
return reply;
}
// We want to exclude nodes high up the tree (body/html) unless the user
// has selected that node, in which case we need to report something.
do {
reply.unshift({
display: CssLogic.getShortName(aElement),
element: aElement
});
aElement = aElement.parentNode;
} while (aElement && aElement != doc.body && aElement != doc.head && aElement != doc);
return reply;
};
/**
* Get a string list of selectors for a given DOMRule.
*
* @param {DOMRule} aDOMRule
* The DOMRule to parse.
* @return {Array}
* An array of string selectors.
*/
CssLogic.getSelectors = function CssLogic_getSelectors(aDOMRule)
{
let selectors = [];
let len = domUtils.getSelectorCount(aDOMRule);
for (let i = 0; i < len; i++) {
let text = domUtils.getSelectorText(aDOMRule, i);
selectors.push(text);
}
return selectors;
}
/**
* Given a node, check to see if it is a ::before or ::after element.
* If so, return the node that is accessible from within the document
* (the parent of the anonymous node), along with which pseudo element
* it was. Otherwise, return the node itself.
*
* @returns {Object}
* - {DOMNode} node The non-anonymous node
* - {string} pseudo One of ':before', ':after', or null.
*/
CssLogic.getBindingElementAndPseudo = function(node)
{
let bindingElement = node;
let pseudo = null;
if (node.nodeName == "_moz_generated_content_before") {
bindingElement = node.parentNode;
pseudo = ":before";
} else if (node.nodeName == "_moz_generated_content_after") {
bindingElement = node.parentNode;
pseudo = ":after";
}
return {
bindingElement: bindingElement,
pseudo: pseudo
};
};
/**
* Get the computed style on a node. Automatically handles reading
* computed styles on a ::before/::after element by reading on the
* parent node with the proper pseudo argument.
*
* @param {Node}
* @returns {CSSStyleDeclaration}
*/
CssLogic.getComputedStyle = function(node)
{
if (!node ||
Cu.isDeadWrapper(node) ||
node.nodeType !== Ci.nsIDOMNode.ELEMENT_NODE ||
!node.ownerDocument ||
!node.ownerDocument.defaultView) {
return null;
}
let {bindingElement, pseudo} = CssLogic.getBindingElementAndPseudo(node);
return node.ownerDocument.defaultView.getComputedStyle(bindingElement, pseudo);
};
/**
* Memonized lookup of a l10n string from a string bundle.
* @param {string} aName The key to lookup.
* @returns A localized version of the given key.
*/
CssLogic.l10n = function(aName) CssLogic._strings.GetStringFromName(aName);
DevToolsUtils.defineLazyGetter(CssLogic, "_strings", function() Services.strings
.createBundle("chrome://global/locale/devtools/styleinspector.properties"));
/**
* Is the given property sheet a content stylesheet?
*
* @param {CSSStyleSheet} aSheet a stylesheet
* @return {boolean} true if the given stylesheet is a content stylesheet,
* false otherwise.
*/
CssLogic.isContentStylesheet = function CssLogic_isContentStylesheet(aSheet)
{
// All sheets with owner nodes have been included by content.
if (aSheet.ownerNode) {
return true;
}
// If the sheet has a CSSImportRule we need to check the parent stylesheet.
if (aSheet.ownerRule instanceof Ci.nsIDOMCSSImportRule) {
return CssLogic.isContentStylesheet(aSheet.parentStyleSheet);
}
return false;
};
/**
* Get a source for a stylesheet, taking into account embedded stylesheets
* for which we need to use document.defaultView.location.href rather than
* sheet.href
*
* @param {CSSStyleSheet} aSheet the DOM object for the style sheet.
* @return {string} the address of the stylesheet.
*/
CssLogic.href = function CssLogic_href(aSheet)
{
let href = aSheet.href;
if (!href) {
href = aSheet.ownerNode.ownerDocument.location;
}
return href;
};
/**
* Return a shortened version of a style sheet's source.
*
* @param {CSSStyleSheet} aSheet the DOM object for the style sheet.
*/
CssLogic.shortSource = function CssLogic_shortSource(aSheet)
{
// Use a string like "inline" if there is no source href
if (!aSheet || !aSheet.href) {
return CssLogic.l10n("rule.sourceInline");
}
// We try, in turn, the filename, filePath, query string, whole thing
let url = {};
try {
url = Services.io.newURI(aSheet.href, null, null);
url = url.QueryInterface(Ci.nsIURL);
} catch (ex) {
// Some UA-provided stylesheets are not valid URLs.
}
if (url.fileName) {
return url.fileName;
}
if (url.filePath) {
return url.filePath;
}
if (url.query) {
return url.query;
}
let dataUrl = aSheet.href.match(/^(data:[^,]*),/);
return dataUrl ? dataUrl[1] : aSheet.href;
}
/**
* Find the position of [element] in [nodeList].
* @returns an index of the match, or -1 if there is no match
*/
function positionInNodeList(element, nodeList) {
for (var i = 0; i < nodeList.length; i++) {
if (element === nodeList[i]) {
return i;
}
}
return -1;
}
/**
* Find a unique CSS selector for a given element
* @returns a string such that ele.ownerDocument.querySelector(reply) === ele
* and ele.ownerDocument.querySelectorAll(reply).length === 1
*/
CssLogic.findCssSelector = function CssLogic_findCssSelector(ele) {
ele = LayoutHelpers.getRootBindingParent(ele);
var document = ele.ownerDocument;
if (!document || !document.contains(ele)) {
throw new Error('findCssSelector received element not inside document');
}
// document.querySelectorAll("#id") returns multiple if elements share an ID
if (ele.id && document.querySelectorAll('#' + CSS.escape(ele.id)).length === 1) {
return '#' + CSS.escape(ele.id);
}
// Inherently unique by tag name
var tagName = ele.localName;
if (tagName === 'html') {
return 'html';
}
if (tagName === 'head') {
return 'head';
}
if (tagName === 'body') {
return 'body';
}
// We might be able to find a unique class name
var selector, index, matches;
if (ele.classList.length > 0) {
for (var i = 0; i < ele.classList.length; i++) {
// Is this className unique by itself?
selector = '.' + CSS.escape(ele.classList.item(i));
matches = document.querySelectorAll(selector);
if (matches.length === 1) {
return selector;
}
// Maybe it's unique with a tag name?
selector = tagName + selector;
matches = document.querySelectorAll(selector);
if (matches.length === 1) {
return selector;
}
// Maybe it's unique using a tag name and nth-child
index = positionInNodeList(ele, ele.parentNode.children) + 1;
selector = selector + ':nth-child(' + index + ')';
matches = document.querySelectorAll(selector);
if (matches.length === 1) {
return selector;
}
}
}
// Not unique enough yet. As long as it's not a child of the document,
// continue recursing up until it is unique enough.
if (ele.parentNode !== document) {
index = positionInNodeList(ele, ele.parentNode.children) + 1;
selector = CssLogic_findCssSelector(ele.parentNode) + ' > ' +
tagName + ':nth-child(' + index + ')';
}
return selector;
};
const TAB_CHARS = "\t";
/**
* Prettify minified CSS text.
* This prettifies CSS code where there is no indentation in usual places while
* keeping original indentation as-is elsewhere.
* @param string text The CSS source to prettify.
* @return string Prettified CSS source
*/
CssLogic.prettifyCSS = function(text, ruleCount) {
if (CssLogic.LINE_SEPARATOR == null) {
let os = Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULRuntime).OS;
CssLogic.LINE_SEPARATOR = (os === "WINNT" ? "\r\n" : "\n");
}
// remove initial and terminating HTML comments and surrounding whitespace
text = text.replace(/(?:^\s*<!--[\r\n]*)|(?:\s*-->\s*$)/g, "");
// don't attempt to prettify if there's more than one line per rule.
let lineCount = text.split("\n").length - 1;
if (ruleCount !== null && lineCount >= ruleCount) {
return text;
}
let parts = []; // indented parts
let partStart = 0; // start offset of currently parsed part
let indent = "";
let indentLevel = 0;
for (let i = 0; i < text.length; i++) {
let c = text[i];
let shouldIndent = false;
switch (c) {
case "}":
if (i - partStart > 1) {
// there's more than just } on the line, add line
parts.push(indent + text.substring(partStart, i));
partStart = i;
}
indent = TAB_CHARS.repeat(--indentLevel);
/* fallthrough */
case ";":
case "{":
shouldIndent = true;
break;
}
if (shouldIndent) {
let la = text[i+1]; // one-character lookahead
if (!/\n/.test(la) || /^\s+$/.test(text.substring(i+1, text.length))) {
// following character should be a new line, but isn't,
// or it's whitespace at the end of the file
parts.push(indent + text.substring(partStart, i + 1));
if (c == "}") {
parts.push(""); // for extra line separator
}
partStart = i + 1;
} else {
return text; // assume it is not minified, early exit
}
}
if (c == "{") {
indent = TAB_CHARS.repeat(++indentLevel);
}
}
return parts.join(CssLogic.LINE_SEPARATOR);
};
/**
* A safe way to access cached bits of information about a stylesheet.
*
* @constructor
* @param {CssLogic} aCssLogic pointer to the CssLogic instance working with
* this CssSheet object.
* @param {CSSStyleSheet} aDomSheet reference to a DOM CSSStyleSheet object.
* @param {number} aIndex tells the index/position of the stylesheet within the
* main document.
*/
function CssSheet(aCssLogic, aDomSheet, aIndex)
{
this._cssLogic = aCssLogic;
this.domSheet = aDomSheet;
this.index = this.contentSheet ? aIndex : -100 * aIndex;
// Cache of the sheets href. Cached by the getter.
this._href = null;
// Short version of href for use in select boxes etc. Cached by getter.
this._shortSource = null;
// null for uncached.
this._sheetAllowed = null;
// Cached CssRules from the given stylesheet.
this._rules = {};
this._ruleCount = -1;
}
CssSheet.prototype = {
_passId: null,
_contentSheet: null,
_mediaMatches: null,
/**
* Tells if the stylesheet is provided by the browser or not.
*
* @return {boolean} false if this is a browser-provided stylesheet, or true
* otherwise.
*/
get contentSheet()
{
if (this._contentSheet === null) {
this._contentSheet = CssLogic.isContentStylesheet(this.domSheet);
}
return this._contentSheet;
},
/**
* Tells if the stylesheet is disabled or not.
* @return {boolean} true if this stylesheet is disabled, or false otherwise.
*/
get disabled()
{
return this.domSheet.disabled;
},
/**
* Tells if the stylesheet matches the current browser view media.
* @return {boolean} true if this stylesheet matches the current browser view
* media, or false otherwise.
*/
get mediaMatches()
{
if (this._mediaMatches === null) {
this._mediaMatches = this._cssLogic.mediaMatches(this.domSheet);
}
return this._mediaMatches;
},
/**
* Get a source for a stylesheet, using CssLogic.href
*
* @return {string} the address of the stylesheet.
*/
get href()
{
if (this._href) {
return this._href;
}
this._href = CssLogic.href(this.domSheet);
return this._href;
},
/**
* Create a shorthand version of the href of a stylesheet.
*
* @return {string} the shorthand source of the stylesheet.
*/
get shortSource()
{
if (this._shortSource) {
return this._shortSource;
}
this._shortSource = CssLogic.shortSource(this.domSheet);
return this._shortSource;
},
/**
* Tells if the sheet is allowed or not by the current CssLogic.sourceFilter.
*
* @return {boolean} true if the stylesheet is allowed by the sourceFilter, or
* false otherwise.
*/
get sheetAllowed()
{
if (this._sheetAllowed !== null) {
return this._sheetAllowed;
}
this._sheetAllowed = true;
let filter = this._cssLogic.sourceFilter;
if (filter === CssLogic.FILTER.USER && !this.contentSheet) {
this._sheetAllowed = false;
}
if (filter !== CssLogic.FILTER.USER && filter !== CssLogic.FILTER.UA) {
this._sheetAllowed = (filter === this.href);
}
return this._sheetAllowed;
},
/**
* Retrieve the number of rules in this stylesheet.
*
* @return {number} the number of nsIDOMCSSRule objects in this stylesheet.
*/
get ruleCount()
{
return this._ruleCount > -1 ?
this._ruleCount :
this.domSheet.cssRules.length;
},
/**
* Retrieve a CssRule object for the given CSSStyleRule. The CssRule object is
* cached, such that subsequent retrievals return the same CssRule object for
* the same CSSStyleRule object.
*
* @param {CSSStyleRule} aDomRule the CSSStyleRule object for which you want a
* CssRule object.
* @return {CssRule} the cached CssRule object for the given CSSStyleRule
* object.
*/
getRule: function CssSheet_getRule(aDomRule)
{
let cacheId = aDomRule.type + aDomRule.selectorText;
let rule = null;
let ruleFound = false;
if (cacheId in this._rules) {
for (let i = 0, rulesLen = this._rules[cacheId].length; i < rulesLen; i++) {
rule = this._rules[cacheId][i];
if (rule.domRule === aDomRule) {
ruleFound = true;
break;
}
}
}
if (!ruleFound) {
if (!(cacheId in this._rules)) {
this._rules[cacheId] = [];
}
rule = new CssRule(this, aDomRule);
this._rules[cacheId].push(rule);
}
return rule;
},
/**
* Process each rule in this stylesheet using your callback function. Your
* function receives one argument: the CssRule object for each CSSStyleRule
* inside the stylesheet.
*
* Note that this method also iterates through @media rules inside the
* stylesheet.
*
* @param {function} aCallback the function you want to execute for each of
* the style rules.
* @param {object} aScope the scope you want for the callback function. aScope
* will be the this object when aCallback executes.
*/
forEachRule: function CssSheet_forEachRule(aCallback, aScope)
{
let ruleCount = 0;
let domRules = this.domSheet.cssRules;
function _iterator(aDomRule) {
if (aDomRule.type == Ci.nsIDOMCSSRule.STYLE_RULE) {
aCallback.call(aScope, this.getRule(aDomRule));
ruleCount++;
} else if (aDomRule.type == Ci.nsIDOMCSSRule.MEDIA_RULE &&
aDomRule.cssRules && this._cssLogic.mediaMatches(aDomRule)) {
Array.prototype.forEach.call(aDomRule.cssRules, _iterator, this);
}
}
Array.prototype.forEach.call(domRules, _iterator, this);
this._ruleCount = ruleCount;
},
/**
* Process *some* rules in this stylesheet using your callback function. Your
* function receives one argument: the CssRule object for each CSSStyleRule
* inside the stylesheet. In order to stop processing the callback function
* needs to return a value.
*
* Note that this method also iterates through @media rules inside the
* stylesheet.
*
* @param {function} aCallback the function you want to execute for each of
* the style rules.
* @param {object} aScope the scope you want for the callback function. aScope
* will be the this object when aCallback executes.
* @return {Boolean} true if aCallback returns true during any iteration,
* otherwise false is returned.
*/
forSomeRules: function CssSheet_forSomeRules(aCallback, aScope)
{
let domRules = this.domSheet.cssRules;
function _iterator(aDomRule) {
if (aDomRule.type == Ci.nsIDOMCSSRule.STYLE_RULE) {
return aCallback.call(aScope, this.getRule(aDomRule));
} else if (aDomRule.type == Ci.nsIDOMCSSRule.MEDIA_RULE &&
aDomRule.cssRules && this._cssLogic.mediaMatches(aDomRule)) {
return Array.prototype.some.call(aDomRule.cssRules, _iterator, this);
}
return false;
}
return Array.prototype.some.call(domRules, _iterator, this);
},
toString: function CssSheet_toString()
{
return "CssSheet[" + this.shortSource + "]";
}
};
/**
* Information about a single CSSStyleRule.
*
* @param {CSSSheet|null} aCssSheet the CssSheet object of the stylesheet that
* holds the CSSStyleRule. If the rule comes from element.style, set this
* argument to null.
* @param {CSSStyleRule|object} aDomRule the DOM CSSStyleRule for which you want
* to cache data. If the rule comes from element.style, then provide
* an object of the form: {style: element.style}.
* @param {Element} [aElement] If the rule comes from element.style, then this
* argument must point to the element.
* @constructor
*/
function CssRule(aCssSheet, aDomRule, aElement)
{
this._cssSheet = aCssSheet;
this.domRule = aDomRule;
let parentRule = aDomRule.parentRule;
if (parentRule && parentRule.type == Ci.nsIDOMCSSRule.MEDIA_RULE) {
this.mediaText = parentRule.media.mediaText;
}
if (this._cssSheet) {
// parse domRule.selectorText on call to this.selectors
this._selectors = null;
this.line = domUtils.getRuleLine(this.domRule);
this.source = this._cssSheet.shortSource + ":" + this.line;
if (this.mediaText) {
this.source += " @media " + this.mediaText;
}
this.href = this._cssSheet.href;
this.contentRule = this._cssSheet.contentSheet;
} else if (aElement) {
this._selectors = [ new CssSelector(this, "@element.style", 0) ];
this.line = -1;
this.source = CssLogic.l10n("rule.sourceElement");
this.href = "#";
this.contentRule = true;
this.sourceElement = aElement;
}
}
CssRule.prototype = {
_passId: null,
mediaText: "",
get isMediaRule()
{
return !!this.mediaText;
},
/**
* Check if the parent stylesheet is allowed by the CssLogic.sourceFilter.
*
* @return {boolean} true if the parent stylesheet is allowed by the current
* sourceFilter, or false otherwise.
*/
get sheetAllowed()
{
return this._cssSheet ? this._cssSheet.sheetAllowed : true;
},
/**
* Retrieve the parent stylesheet index/position in the viewed document.
*
* @return {number} the parent stylesheet index/position in the viewed
* document.
*/
get sheetIndex()
{
return this._cssSheet ? this._cssSheet.index : 0;
},
/**
* Retrieve the style property value from the current CSSStyleRule.
*
* @param {string} aProperty the CSS property name for which you want the
* value.
* @return {string} the property value.
*/
getPropertyValue: function(aProperty)
{
return this.domRule.style.getPropertyValue(aProperty);
},
/**
* Retrieve the style property priority from the current CSSStyleRule.
*
* @param {string} aProperty the CSS property name for which you want the
* priority.
* @return {string} the property priority.
*/
getPropertyPriority: function(aProperty)
{
return this.domRule.style.getPropertyPriority(aProperty);
},
/**
* Retrieve the list of CssSelector objects for each of the parsed selectors
* of the current CSSStyleRule.
*
* @return {array} the array hold the CssSelector objects.
*/
get selectors()
{
if (this._selectors) {
return this._selectors;
}
// Parse the CSSStyleRule.selectorText string.
this._selectors = [];
if (!this.domRule.selectorText) {
return this._selectors;
}
let selectors = CssLogic.getSelectors(this.domRule);
for (let i = 0, len = selectors.length; i < len; i++) {
this._selectors.push(new CssSelector(this, selectors[i], i));
}
return this._selectors;
},
toString: function CssRule_toString()
{
return "[CssRule " + this.domRule.selectorText + "]";
},
};
/**
* The CSS selector class allows us to document the ranking of various CSS
* selectors.
*
* @constructor
* @param {CssRule} aCssRule the CssRule instance from where the selector comes.
* @param {string} aSelector The selector that we wish to investigate.
* @param {Number} aIndex The index of the selector within it's rule.
*/
function CssSelector(aCssRule, aSelector, aIndex)
{
this.cssRule = aCssRule;
this.text = aSelector;
this.elementStyle = this.text == "@element.style";
this._specificity = null;
this.selectorIndex = aIndex;
}
exports.CssSelector = CssSelector;
CssSelector.prototype = {
_matchId: null,
/**
* Retrieve the CssSelector source, which is the source of the CssSheet owning
* the selector.
*
* @return {string} the selector source.
*/
get source()
{
return this.cssRule.source;
},
/**
* Retrieve the CssSelector source element, which is the source of the CssRule
* owning the selector. This is only available when the CssSelector comes from
* an element.style.
*
* @return {string} the source element selector.
*/
get sourceElement()
{
return this.cssRule.sourceElement;
},
/**
* Retrieve the address of the CssSelector. This points to the address of the
* CssSheet owning this selector.
*
* @return {string} the address of the CssSelector.
*/
get href()
{
return this.cssRule.href;
},
/**
* Check if the selector comes from a browser-provided stylesheet.
*
* @return {boolean} true if the selector comes from a content-provided
* stylesheet, or false otherwise.
*/
get contentRule()
{
return this.cssRule.contentRule;
},
/**
* Check if the parent stylesheet is allowed by the CssLogic.sourceFilter.
*
* @return {boolean} true if the parent stylesheet is allowed by the current
* sourceFilter, or false otherwise.
*/
get sheetAllowed()
{
return this.cssRule.sheetAllowed;
},
/**
* Retrieve the parent stylesheet index/position in the viewed document.
*
* @return {number} the parent stylesheet index/position in the viewed
* document.
*/
get sheetIndex()
{
return this.cssRule.sheetIndex;
},
/**
* Retrieve the line of the parent CSSStyleRule in the parent CSSStyleSheet.
*
* @return {number} the line of the parent CSSStyleRule in the parent
* stylesheet.
*/
get ruleLine()
{
return this.cssRule.line;
},
/**
* Retrieve the pseudo-elements that we support. This list should match the
* elements specified in layout/style/nsCSSPseudoElementList.h
*/
get pseudoElements()
{
if (!CssSelector._pseudoElements) {
let pseudos = CssSelector._pseudoElements = new Set();
pseudos.add("after");
pseudos.add("before");
pseudos.add("first-letter");
pseudos.add("first-line");
pseudos.add("selection");
pseudos.add("-moz-color-swatch");
pseudos.add("-moz-focus-inner");
pseudos.add("-moz-focus-outer");
pseudos.add("-moz-list-bullet");
pseudos.add("-moz-list-number");
pseudos.add("-moz-math-anonymous");
pseudos.add("-moz-math-stretchy");
pseudos.add("-moz-progress-bar");
pseudos.add("-moz-selection");
}
return CssSelector._pseudoElements;
},
/**
* Retrieve specificity information for the current selector.
*
* @see http://www.w3.org/TR/css3-selectors/#specificity
* @see http://www.w3.org/TR/CSS2/selector.html
*
* @return {Number} The selector's specificity.
*/
get specificity()
{
if (this.elementStyle) {
// We can't ask specificity from DOMUtils as element styles don't provide
// CSSStyleRule interface DOMUtils expect. However, specificity of element
// style is constant, 1,0,0,0 or 0x01000000, just return the constant
// directly. @see http://www.w3.org/TR/CSS2/cascade.html#specificity
return 0x01000000;
}
if (this._specificity) {
return this._specificity;
}
this._specificity = domUtils.getSpecificity(this.cssRule.domRule,
this.selectorIndex);
return this._specificity;
},
toString: function CssSelector_toString()
{
return this.text;
},
};
/**
* A cache of information about the matched rules, selectors and values attached
* to a CSS property, for the highlighted element.
*
* The heart of the CssPropertyInfo object is the _findMatchedSelectors()
* method. This are invoked when the PropertyView tries to access the
* .matchedSelectors array.
* Results are cached, for later reuse.
*
* @param {CssLogic} aCssLogic Reference to the parent CssLogic instance
* @param {string} aProperty The CSS property we are gathering information for
* @constructor
*/
function CssPropertyInfo(aCssLogic, aProperty)
{
this._cssLogic = aCssLogic;
this.property = aProperty;
this._value = "";
// The number of matched rules holding the this.property style property.
// Additionally, only rules that come from allowed stylesheets are counted.
this._matchedRuleCount = 0;
// An array holding CssSelectorInfo objects for each of the matched selectors
// that are inside a CSS rule. Only rules that hold the this.property are
// counted. This includes rules that come from filtered stylesheets (those
// that have sheetAllowed = false).
this._matchedSelectors = null;
}
CssPropertyInfo.prototype = {
/**
* Retrieve the computed style value for the current property, for the
* highlighted element.
*
* @return {string} the computed style value for the current property, for the
* highlighted element.
*/
get value()
{
if (!this._value && this._cssLogic.computedStyle) {
try {
this._value = this._cssLogic.computedStyle.getPropertyValue(this.property);
} catch (ex) {
Services.console.logStringMessage('Error reading computed style for ' +
this.property);
Services.console.logStringMessage(ex);
}
}
return this._value;
},
/**
* Retrieve the number of matched rules holding the this.property style
* property. Only rules that come from allowed stylesheets are counted.
*
* @return {number} the number of matched rules.
*/
get matchedRuleCount()
{
if (!this._matchedSelectors) {
this._findMatchedSelectors();
} else if (this.needRefilter) {
this._refilterSelectors();
}
return this._matchedRuleCount;
},
/**
* Retrieve the array holding CssSelectorInfo objects for each of the matched
* selectors, from each of the matched rules. Only selectors coming from
* allowed stylesheets are included in the array.
*
* @return {array} the list of CssSelectorInfo objects of selectors that match
* the highlighted element and its parents.
*/
get matchedSelectors()
{
if (!this._matchedSelectors) {
this._findMatchedSelectors();
} else if (this.needRefilter) {
this._refilterSelectors();
}
return this._matchedSelectors;
},
/**
* Find the selectors that match the highlighted element and its parents.
* Uses CssLogic.processMatchedSelectors() to find the matched selectors,
* passing in a reference to CssPropertyInfo._processMatchedSelector() to
* create CssSelectorInfo objects, which we then sort
* @private
*/
_findMatchedSelectors: function CssPropertyInfo_findMatchedSelectors()
{
this._matchedSelectors = [];
this._matchedRuleCount = 0;
this.needRefilter = false;
this._cssLogic.processMatchedSelectors(this._processMatchedSelector, this);
// Sort the selectors by how well they match the given element.
this._matchedSelectors.sort(function(aSelectorInfo1, aSelectorInfo2) {
if (aSelectorInfo1.status > aSelectorInfo2.status) {
return -1;
} else if (aSelectorInfo2.status > aSelectorInfo1.status) {
return 1;
} else {
return aSelectorInfo1.compareTo(aSelectorInfo2);
}
});
// Now we know which of the matches is best, we can mark it BEST_MATCH.
if (this._matchedSelectors.length > 0 &&
this._matchedSelectors[0].status > CssLogic.STATUS.UNMATCHED) {
this._matchedSelectors[0].status = CssLogic.STATUS.BEST;
}
},
/**
* Process a matched CssSelector object.
*
* @private
* @param {CssSelector} aSelector the matched CssSelector object.
* @param {CssLogic.STATUS} aStatus the CssSelector match status.
*/
_processMatchedSelector: function CssPropertyInfo_processMatchedSelector(aSelector, aStatus)
{
let cssRule = aSelector.cssRule;
let value = cssRule.getPropertyValue(this.property);
if (value &&
(aStatus == CssLogic.STATUS.MATCHED ||
(aStatus == CssLogic.STATUS.PARENT_MATCH &&
domUtils.isInheritedProperty(this.property)))) {
let selectorInfo = new CssSelectorInfo(aSelector, this.property, value,
aStatus);
this._matchedSelectors.push(selectorInfo);
if (this._cssLogic._passId !== cssRule._passId && cssRule.sheetAllowed) {
this._matchedRuleCount++;
}
}
},
/**
* Refilter the matched selectors array when the CssLogic.sourceFilter
* changes. This allows for quick filter changes.
* @private
*/
_refilterSelectors: function CssPropertyInfo_refilterSelectors()
{
let passId = ++this._cssLogic._passId;
let ruleCount = 0;
let iterator = function(aSelectorInfo) {
let cssRule = aSelectorInfo.selector.cssRule;
if (cssRule._passId != passId) {
if (cssRule.sheetAllowed) {
ruleCount++;
}
cssRule._passId = passId;
}
};
if (this._matchedSelectors) {
this._matchedSelectors.forEach(iterator);
this._matchedRuleCount = ruleCount;
}
this.needRefilter = false;
},
toString: function CssPropertyInfo_toString()
{
return "CssPropertyInfo[" + this.property + "]";
},
};
/**
* A class that holds information about a given CssSelector object.
*
* Instances of this class are given to CssHtmlTree in the array of matched
* selectors. Each such object represents a displayable row in the PropertyView
* objects. The information given by this object blends data coming from the
* CssSheet, CssRule and from the CssSelector that own this object.
*
* @param {CssSelector} aSelector The CssSelector object for which to present information.
* @param {string} aProperty The property for which information should be retrieved.
* @param {string} aValue The property value from the CssRule that owns the selector.
* @param {CssLogic.STATUS} aStatus The selector match status.
* @constructor
*/
function CssSelectorInfo(aSelector, aProperty, aValue, aStatus)
{
this.selector = aSelector;
this.property = aProperty;
this.status = aStatus;
this.value = aValue;
let priority = this.selector.cssRule.getPropertyPriority(this.property);
this.important = (priority === "important");
}
CssSelectorInfo.prototype = {
/**
* Retrieve the CssSelector source, which is the source of the CssSheet owning
* the selector.
*
* @return {string} the selector source.
*/
get source()
{
return this.selector.source;
},
/**
* Retrieve the CssSelector source element, which is the source of the CssRule
* owning the selector. This is only available when the CssSelector comes from
* an element.style.
*
* @return {string} the source element selector.
*/
get sourceElement()
{
return this.selector.sourceElement;
},
/**
* Retrieve the address of the CssSelector. This points to the address of the
* CssSheet owning this selector.
*
* @return {string} the address of the CssSelector.
*/
get href()
{
return this.selector.href;
},
/**
* Check if the CssSelector comes from element.style or not.
*
* @return {boolean} true if the CssSelector comes from element.style, or
* false otherwise.
*/
get elementStyle()
{
return this.selector.elementStyle;
},
/**
* Retrieve specificity information for the current selector.
*
* @return {object} an object holding specificity information for the current
* selector.
*/
get specificity()
{
return this.selector.specificity;
},
/**
* Retrieve the parent stylesheet index/position in the viewed document.
*
* @return {number} the parent stylesheet index/position in the viewed
* document.
*/
get sheetIndex()
{
return this.selector.sheetIndex;
},
/**
* Check if the parent stylesheet is allowed by the CssLogic.sourceFilter.
*
* @return {boolean} true if the parent stylesheet is allowed by the current
* sourceFilter, or false otherwise.
*/
get sheetAllowed()
{
return this.selector.sheetAllowed;
},
/**
* Retrieve the line of the parent CSSStyleRule in the parent CSSStyleSheet.
*
* @return {number} the line of the parent CSSStyleRule in the parent
* stylesheet.
*/
get ruleLine()
{
return this.selector.ruleLine;
},
/**
* Check if the selector comes from a browser-provided stylesheet.
*
* @return {boolean} true if the selector comes from a browser-provided
* stylesheet, or false otherwise.
*/
get contentRule()
{
return this.selector.contentRule;
},
/**
* Compare the current CssSelectorInfo instance to another instance, based on
* specificity information.
*
* @param {CssSelectorInfo} aThat The instance to compare ourselves against.
* @return number -1, 0, 1 depending on how aThat compares with this.
*/
compareTo: function CssSelectorInfo_compareTo(aThat)
{
if (!this.contentRule && aThat.contentRule) return 1;
if (this.contentRule && !aThat.contentRule) return -1;
if (this.elementStyle && !aThat.elementStyle) {
if (!this.important && aThat.important) return 1;
else return -1;
}
if (!this.elementStyle && aThat.elementStyle) {
if (this.important && !aThat.important) return -1;
else return 1;
}
if (this.important && !aThat.important) return -1;
if (aThat.important && !this.important) return 1;
if (this.specificity > aThat.specificity) return -1;
if (aThat.specificity > this.specificity) return 1;
if (this.sheetIndex > aThat.sheetIndex) return -1;
if (aThat.sheetIndex > this.sheetIndex) return 1;
if (this.ruleLine > aThat.ruleLine) return -1;
if (aThat.ruleLine > this.ruleLine) return 1;
return 0;
},
toString: function CssSelectorInfo_toString()
{
return this.selector + " -> " + this.value;
},
};
DevToolsUtils.defineLazyGetter(this, "domUtils", function() {
return Cc["@mozilla.org/inspector/dom-utils;1"].getService(Ci.inIDOMUtils);
});
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку