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bc3b52e35a
Adjust the grid outline in the Inspector's Layout panel as needed to match the writing mode and text direction of the grid container. MozReview-Commit-ID: Ggcp1e4ZipE --HG-- extra : rebase_source : e9acadc8837ad3c05c038a2156272c9eff8c7330
244 lines
6.9 KiB
JavaScript
244 lines
6.9 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { Cu } = require("chrome");
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const { Actor, ActorClassWithSpec } = require("devtools/shared/protocol");
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const { flexboxSpec, gridSpec, layoutSpec } = require("devtools/shared/specs/layout");
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const nodeFilterConstants = require("devtools/shared/dom-node-filter-constants");
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const { getStringifiableFragments } =
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require("devtools/server/actors/utils/css-grid-utils");
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loader.lazyRequireGetter(this, "nodeConstants", "devtools/shared/dom-node-constants");
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loader.lazyRequireGetter(this, "CssLogic", "devtools/server/css-logic", true);
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/**
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* Set of actors the expose the CSS layout information to the devtools protocol clients.
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*
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* The |Layout| actor is the main entry point. It is used to get various CSS
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* layout-related information from the document.
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*
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* The |Flexbox| actor provides the container node information to inspect the flexbox
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* container.
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*
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* The |Grid| actor provides the grid fragment information to inspect the grid container.
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*/
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const FlexboxActor = ActorClassWithSpec(flexboxSpec, {
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/**
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* @param {LayoutActor} layoutActor
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* The LayoutActor instance.
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* @param {DOMNode} containerEl
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* The flex container element.
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*/
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initialize(layoutActor, containerEl) {
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Actor.prototype.initialize.call(this, layoutActor.conn);
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this.containerEl = containerEl;
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this.walker = layoutActor.walker;
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},
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destroy() {
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Actor.prototype.destroy.call(this);
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this.containerEl = null;
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this.walker = null;
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},
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form(detail) {
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if (detail === "actorid") {
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return this.actorID;
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}
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let form = {
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actor: this.actorID,
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};
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// If the WalkerActor already knows the container element, then also return its
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// ActorID so we avoid the client from doing another round trip to get it in many
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// cases.
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if (this.walker.hasNode(this.containerEl)) {
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form.containerNodeActorID = this.walker.getNode(this.containerEl).actorID;
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}
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return form;
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},
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});
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/**
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* The GridActor provides information about a given grid's fragment data.
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*/
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const GridActor = ActorClassWithSpec(gridSpec, {
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/**
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* @param {LayoutActor} layoutActor
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* The LayoutActor instance.
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* @param {DOMNode} containerEl
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* The grid container element.
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*/
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initialize(layoutActor, containerEl) {
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Actor.prototype.initialize.call(this, layoutActor.conn);
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this.containerEl = containerEl;
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this.walker = layoutActor.walker;
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},
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destroy() {
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Actor.prototype.destroy.call(this);
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this.containerEl = null;
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this.gridFragments = null;
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this.walker = null;
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},
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form(detail) {
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if (detail === "actorid") {
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return this.actorID;
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}
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// Seralize the grid fragment data into JSON so protocol.js knows how to write
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// and read the data.
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let gridFragments = this.containerEl.getGridFragments();
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this.gridFragments = getStringifiableFragments(gridFragments);
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// Record writing mode and text direction for use by the grid outline.
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let { direction, writingMode } = CssLogic.getComputedStyle(this.containerEl);
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let form = {
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actor: this.actorID,
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direction,
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gridFragments: this.gridFragments,
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writingMode,
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};
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// If the WalkerActor already knows the container element, then also return its
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// ActorID so we avoid the client from doing another round trip to get it in many
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// cases.
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if (this.walker.hasNode(this.containerEl)) {
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form.containerNodeActorID = this.walker.getNode(this.containerEl).actorID;
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}
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return form;
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},
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});
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/**
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* The CSS layout actor provides layout information for the given document.
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*/
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const LayoutActor = ActorClassWithSpec(layoutSpec, {
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initialize(conn, tabActor, walker) {
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Actor.prototype.initialize.call(this, conn);
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this.tabActor = tabActor;
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this.walker = walker;
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},
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destroy() {
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Actor.prototype.destroy.call(this);
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this.tabActor = null;
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this.walker = null;
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},
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/**
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* Returns the flex container found by iterating on the given selected node. The current
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* node can be a flex container or flex item. If it is a flex item, returns the parent
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* flex container. Otherwise, return null if the current or parent node is not a flex
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* container.
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*
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* @param {Node|NodeActor} node
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* The node to start iterating at.
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* @return {FlexboxActor|Null} The FlexboxActor of the flex container of the give node.
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* Otherwise, returns null.
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*/
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getCurrentFlexbox(node) {
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if (isNodeDead(node)) {
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return null;
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}
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// Given node can either be a Node or a NodeActor.
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if (node.rawNode) {
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node = node.rawNode;
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}
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let treeWalker = this.walker.getDocumentWalker(node,
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nodeFilterConstants.SHOW_ELEMENT);
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let currentNode = treeWalker.currentNode;
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let displayType = this.walker.getNode(currentNode).displayType;
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if (!displayType) {
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return null;
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}
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// Check if the current node is a flex container.
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if (displayType == "inline-flex" || displayType == "flex") {
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return new FlexboxActor(this, treeWalker.currentNode);
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}
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// Otherwise, check if this is a flex item or the parent node is a flex container.
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while ((currentNode = treeWalker.parentNode())) {
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if (!currentNode) {
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break;
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}
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displayType = this.walker.getNode(currentNode).displayType;
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switch (displayType) {
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case "inline-flex":
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case "flex":
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return new FlexboxActor(this, currentNode);
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case "contents":
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// Continue walking up the tree since the parent node is a content element.
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continue;
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}
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break;
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}
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return null;
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},
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/**
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* Returns an array of GridActor objects for all the grid elements contained in the
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* given root node.
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*
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* @param {Node|NodeActor} node
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* The root node for grid elements
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* @return {Array} An array of GridActor objects.
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*/
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getGrids(node) {
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if (isNodeDead(node)) {
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return [];
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}
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// Root node can either be a Node or a NodeActor.
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if (node.rawNode) {
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node = node.rawNode;
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}
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// Root node can be a #document object, which does not support getElementsWithGrid.
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if (node.nodeType === nodeConstants.DOCUMENT_NODE) {
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node = node.documentElement;
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}
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let gridElements = node.getElementsWithGrid();
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let gridActors = gridElements.map(n => new GridActor(this, n));
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let frames = node.querySelectorAll("iframe, frame");
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for (let frame of frames) {
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gridActors = gridActors.concat(this.getGrids(frame.contentDocument));
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}
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return gridActors;
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},
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});
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function isNodeDead(node) {
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return !node || (node.rawNode && Cu.isDeadWrapper(node.rawNode));
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}
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exports.FlexboxActor = FlexboxActor;
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exports.GridActor = GridActor;
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exports.LayoutActor = LayoutActor;
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