diff options
author | Matt A. Tobin <email@mattatobin.com> | 2018-02-10 02:51:36 -0500 |
---|---|---|
committer | Matt A. Tobin <email@mattatobin.com> | 2018-02-10 02:51:36 -0500 |
commit | 37d5300335d81cecbecc99812747a657588c63eb (patch) | |
tree | 765efa3b6a56bb715d9813a8697473e120436278 /toolkit/jetpack/sdk/content/context-menu.js | |
parent | b2bdac20c02b12f2057b9ef70b0a946113a00e00 (diff) | |
parent | 4fb11cd5966461bccc3ed1599b808237be6b0de9 (diff) | |
download | UXP-37d5300335d81cecbecc99812747a657588c63eb.tar UXP-37d5300335d81cecbecc99812747a657588c63eb.tar.gz UXP-37d5300335d81cecbecc99812747a657588c63eb.tar.lz UXP-37d5300335d81cecbecc99812747a657588c63eb.tar.xz UXP-37d5300335d81cecbecc99812747a657588c63eb.zip |
Merge branch 'ext-work'
Diffstat (limited to 'toolkit/jetpack/sdk/content/context-menu.js')
-rw-r--r-- | toolkit/jetpack/sdk/content/context-menu.js | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/content/context-menu.js b/toolkit/jetpack/sdk/content/context-menu.js new file mode 100644 index 000000000..2955e2f09 --- /dev/null +++ b/toolkit/jetpack/sdk/content/context-menu.js @@ -0,0 +1,408 @@ +/* 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 { Class } = require("../core/heritage"); +const self = require("../self"); +const { WorkerChild } = require("./worker-child"); +const { getInnerId } = require("../window/utils"); +const { Ci } = require("chrome"); +const { Services } = require("resource://gre/modules/Services.jsm"); +const system = require('../system/events'); +const { process } = require('../remote/child'); + +// These functions are roughly copied from sdk/selection which doesn't work +// in the content process +function getElementWithSelection(window) { + let element = Services.focus.getFocusedElementForWindow(window, false, {}); + if (!element) + return null; + + try { + // Accessing selectionStart and selectionEnd on e.g. a button + // results in an exception thrown as per the HTML5 spec. See + // http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#textFieldSelection + + let { value, selectionStart, selectionEnd } = element; + + let hasSelection = typeof value === "string" && + !isNaN(selectionStart) && + !isNaN(selectionEnd) && + selectionStart !== selectionEnd; + + return hasSelection ? element : null; + } + catch (err) { + console.exception(err); + return null; + } +} + +function safeGetRange(selection, rangeNumber) { + try { + let { rangeCount } = selection; + let range = null; + + for (let rangeNumber = 0; rangeNumber < rangeCount; rangeNumber++ ) { + range = selection.getRangeAt(rangeNumber); + + if (range && range.toString()) + break; + + range = null; + } + + return range; + } + catch (e) { + return null; + } +} + +function getSelection(window) { + let selection = window.getSelection(); + let range = safeGetRange(selection); + if (range) + return range.toString(); + + let node = getElementWithSelection(window); + if (!node) + return null; + + return node.value.substring(node.selectionStart, node.selectionEnd); +} + +//These are used by PageContext.isCurrent below. If the popupNode or any of +//its ancestors is one of these, Firefox uses a tailored context menu, and so +//the page context doesn't apply. +const NON_PAGE_CONTEXT_ELTS = [ + Ci.nsIDOMHTMLAnchorElement, + Ci.nsIDOMHTMLAppletElement, + Ci.nsIDOMHTMLAreaElement, + Ci.nsIDOMHTMLButtonElement, + Ci.nsIDOMHTMLCanvasElement, + Ci.nsIDOMHTMLEmbedElement, + Ci.nsIDOMHTMLImageElement, + Ci.nsIDOMHTMLInputElement, + Ci.nsIDOMHTMLMapElement, + Ci.nsIDOMHTMLMediaElement, + Ci.nsIDOMHTMLMenuElement, + Ci.nsIDOMHTMLObjectElement, + Ci.nsIDOMHTMLOptionElement, + Ci.nsIDOMHTMLSelectElement, + Ci.nsIDOMHTMLTextAreaElement, +]; + +// List all editable types of inputs. Or is it better to have a list +// of non-editable inputs? +var editableInputs = { + email: true, + number: true, + password: true, + search: true, + tel: true, + text: true, + textarea: true, + url: true +}; + +var CONTEXTS = {}; + +var Context = Class({ + initialize: function(id) { + this.id = id; + }, + + adjustPopupNode: function adjustPopupNode(popupNode) { + return popupNode; + }, + + // Gets state to pass through to the parent process for the node the user + // clicked on + getState: function(popupNode) { + return false; + } +}); + +// Matches when the context-clicked node doesn't have any of +// NON_PAGE_CONTEXT_ELTS in its ancestors +CONTEXTS.PageContext = Class({ + extends: Context, + + getState: function(popupNode) { + // If there is a selection in the window then this context does not match + if (!popupNode.ownerDocument.defaultView.getSelection().isCollapsed) + return false; + + // If the clicked node or any of its ancestors is one of the blocked + // NON_PAGE_CONTEXT_ELTS then this context does not match + while (!(popupNode instanceof Ci.nsIDOMDocument)) { + if (NON_PAGE_CONTEXT_ELTS.some(type => popupNode instanceof type)) + return false; + + popupNode = popupNode.parentNode; + } + + return true; + } +}); + +// Matches when there is an active selection in the window +CONTEXTS.SelectionContext = Class({ + extends: Context, + + getState: function(popupNode) { + if (!popupNode.ownerDocument.defaultView.getSelection().isCollapsed) + return true; + + try { + // The node may be a text box which has selectionStart and selectionEnd + // properties. If not this will throw. + let { selectionStart, selectionEnd } = popupNode; + return !isNaN(selectionStart) && !isNaN(selectionEnd) && + selectionStart !== selectionEnd; + } + catch (e) { + return false; + } + } +}); + +// Matches when the context-clicked node or any of its ancestors matches the +// selector given +CONTEXTS.SelectorContext = Class({ + extends: Context, + + initialize: function initialize(id, selector) { + Context.prototype.initialize.call(this, id); + this.selector = selector; + }, + + adjustPopupNode: function adjustPopupNode(popupNode) { + let selector = this.selector; + + while (!(popupNode instanceof Ci.nsIDOMDocument)) { + if (popupNode.matches(selector)) + return popupNode; + + popupNode = popupNode.parentNode; + } + + return null; + }, + + getState: function(popupNode) { + return !!this.adjustPopupNode(popupNode); + } +}); + +// Matches when the page url matches any of the patterns given +CONTEXTS.URLContext = Class({ + extends: Context, + + getState: function(popupNode) { + return popupNode.ownerDocument.URL; + } +}); + +// Matches when the user-supplied predicate returns true +CONTEXTS.PredicateContext = Class({ + extends: Context, + + getState: function(node) { + let window = node.ownerDocument.defaultView; + let data = {}; + + data.documentType = node.ownerDocument.contentType; + + data.documentURL = node.ownerDocument.location.href; + data.targetName = node.nodeName.toLowerCase(); + data.targetID = node.id || null ; + + if ((data.targetName === 'input' && editableInputs[node.type]) || + data.targetName === 'textarea') { + data.isEditable = !node.readOnly && !node.disabled; + } + else { + data.isEditable = node.isContentEditable; + } + + data.selectionText = getSelection(window, "TEXT"); + + data.srcURL = node.src || null; + data.value = node.value || null; + + while (!data.linkURL && node) { + data.linkURL = node.href || null; + node = node.parentNode; + } + + return data; + }, +}); + +function instantiateContext({ id, type, args }) { + if (!(type in CONTEXTS)) { + console.error("Attempt to use unknown context " + type); + return; + } + return new CONTEXTS[type](id, ...args); +} + +var ContextWorker = Class({ + implements: [ WorkerChild ], + + // Calls the context workers context listeners and returns the first result + // that is either a string or a value that evaluates to true. If all of the + // listeners returned false then returns false. If there are no listeners, + // returns true (show the menu item by default). + getMatchedContext: function getCurrentContexts(popupNode) { + let results = this.sandbox.emitSync("context", popupNode); + if (!results.length) + return true; + return results.reduce((val, result) => val || result); + }, + + // Emits a click event in the worker's port. popupNode is the node that was + // context-clicked, and clickedItemData is the data of the item that was + // clicked. + fireClick: function fireClick(popupNode, clickedItemData) { + this.sandbox.emitSync("click", popupNode, clickedItemData); + } +}); + +// Gets the item's content script worker for a window, creating one if necessary +// Once created it will be automatically destroyed when the window unloads. +// If there is not content scripts for the item then null will be returned. +function getItemWorkerForWindow(item, window) { + if (!item.contentScript && !item.contentScriptFile) + return null; + + let id = getInnerId(window); + let worker = item.workerMap.get(id); + + if (worker) + return worker; + + worker = ContextWorker({ + id: item.id, + window, + manager: item.manager, + contentScript: item.contentScript, + contentScriptFile: item.contentScriptFile, + onDetach: function() { + item.workerMap.delete(id); + } + }); + + item.workerMap.set(id, worker); + + return worker; +} + +// A very simple remote proxy for every item. It's job is to provide data for +// the main process to use to determine visibility state and to call into +// content scripts when clicked. +var RemoteItem = Class({ + initialize: function(options, manager) { + this.id = options.id; + this.contexts = options.contexts.map(instantiateContext); + this.contentScript = options.contentScript; + this.contentScriptFile = options.contentScriptFile; + + this.manager = manager; + + this.workerMap = new Map(); + keepAlive.set(this.id, this); + }, + + destroy: function() { + for (let worker of this.workerMap.values()) { + worker.destroy(); + } + keepAlive.delete(this.id); + }, + + activate: function(popupNode, data) { + let worker = getItemWorkerForWindow(this, popupNode.ownerDocument.defaultView); + if (!worker) + return; + + for (let context of this.contexts) + popupNode = context.adjustPopupNode(popupNode); + + worker.fireClick(popupNode, data); + }, + + // Fills addonInfo with state data to send through to the main process + getContextState: function(popupNode, addonInfo) { + if (!(self.id in addonInfo)) { + addonInfo[self.id] = { + processID: process.id, + items: {} + }; + } + + let worker = getItemWorkerForWindow(this, popupNode.ownerDocument.defaultView); + let contextStates = {}; + for (let context of this.contexts) + contextStates[context.id] = context.getState(popupNode); + + addonInfo[self.id].items[this.id] = { + // It isn't ideal to create a PageContext for every item but there isn't + // a good shared place to do it. + pageContext: (new CONTEXTS.PageContext()).getState(popupNode), + contextStates, + hasWorker: !!worker, + workerContext: worker ? worker.getMatchedContext(popupNode) : true + } + } +}); +exports.RemoteItem = RemoteItem; + +// Holds remote items for this frame. +var keepAlive = new Map(); + +// Called to create remote proxies for items. If they already exist we destroy +// and recreate. This can happen if the item changes in some way or in odd +// timing cases where the frame script is create around the same time as the +// item is created in the main process +process.port.on('sdk/contextmenu/createitems', (process, items) => { + for (let itemoptions of items) { + let oldItem = keepAlive.get(itemoptions.id); + if (oldItem) { + oldItem.destroy(); + } + + let item = new RemoteItem(itemoptions, this); + } +}); + +process.port.on('sdk/contextmenu/destroyitems', (process, items) => { + for (let id of items) { + let item = keepAlive.get(id); + item.destroy(); + } +}); + +var lastPopupNode = null; + +system.on('content-contextmenu', ({ subject }) => { + let { event: { target: popupNode }, addonInfo } = subject.wrappedJSObject; + lastPopupNode = popupNode; + + for (let item of keepAlive.values()) { + item.getContextState(popupNode, addonInfo); + } +}, true); + +process.port.on('sdk/contextmenu/activateitems', (process, items, data) => { + for (let id of items) { + let item = keepAlive.get(id); + if (!item) + continue; + + item.activate(lastPopupNode, data); + } +}); |