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/* 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/. */
"use strict";
const {
FrontClassWithSpec,
registerFront,
} = require("resource://devtools/shared/protocol.js");
const {
pageStyleSpec,
} = require("resource://devtools/shared/specs/page-style.js");
/**
* PageStyleFront, the front object for the PageStyleActor
*/
class PageStyleFront extends FrontClassWithSpec(pageStyleSpec) {
_attributesCache = new Map();
constructor(conn, targetFront, parentFront) {
super(conn, targetFront, parentFront);
this.inspector = this.getParent();
this._clearAttributesCache = this._clearAttributesCache.bind(this);
this.on("stylesheet-updated", this._clearAttributesCache);
this.walker.on("new-mutations", this._clearAttributesCache);
}
form(form) {
this._form = form;
}
get walker() {
return this.inspector.walker;
}
get supportsFontStretchLevel4() {
return this._form.traits && this._form.traits.fontStretchLevel4;
}
get supportsFontStyleLevel4() {
return this._form.traits && this._form.traits.fontStyleLevel4;
}
get supportsFontVariations() {
return this._form.traits && this._form.traits.fontVariations;
}
get supportsFontWeightLevel4() {
return this._form.traits && this._form.traits.fontWeightLevel4;
}
getMatchedSelectors(node, property, options) {
return super.getMatchedSelectors(node, property, options).then(ret => {
return ret.matched;
});
}
async getApplied(node, options = {}) {
const ret = await super.getApplied(node, options);
return ret.entries;
}
addNewRule(node, pseudoClasses) {
return super.addNewRule(node, pseudoClasses).then(ret => {
return ret.entries[0];
});
}
/**
* Get an array of existing attribute values in a node document, given an attribute type.
*
* @param {String} search: A string to filter attribute value on.
* @param {String} attributeType: The type of attribute we want to retrieve the values.
* @param {Element} node: The element we want to get possible attributes for. This will
* be used to get the document where the search is happening.
* @returns {Array<String>} An array of strings
*/
async getAttributesInOwnerDocument(search, attributeType, node) {
if (!attributeType) {
throw new Error("`type` should not be empty");
}
if (!search) {
return [];
}
const lcFilter = search.toLowerCase();
// If the new filter includes the string that was used on our last trip to the server,
// we can filter the cached results instead of calling the server again.
if (
this._attributesCache &&
this._attributesCache.has(attributeType) &&
search.startsWith(this._attributesCache.get(attributeType).search)
) {
const cachedResults = this._attributesCache
.get(attributeType)
.results.filter(item => item.toLowerCase().startsWith(lcFilter));
this.emitForTests(
"getAttributesInOwnerDocument-cache-hit",
cachedResults
);
return cachedResults;
}
const results = await super.getAttributesInOwnerDocument(
search,
attributeType,
node
);
this._attributesCache.set(attributeType, { search, results });
return results;
}
_clearAttributesCache() {
this._attributesCache.clear();
}
}
exports.PageStyleFront = PageStyleFront;
registerFront(PageStyleFront);
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