mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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504 lines
17 KiB
JavaScript
504 lines
17 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 promise = require("devtools/toolkit/deprecated-sync-thenables");
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loader.lazyGetter(this, "EventEmitter", () => require("devtools/toolkit/event-emitter"));
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loader.lazyGetter(this, "AutocompletePopup", () => require("devtools/shared/autocomplete-popup").AutocompletePopup);
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// Maximum number of selector suggestions shown in the panel.
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const MAX_SUGGESTIONS = 15;
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/**
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* Converts any input box on a page to a CSS selector search and suggestion box.
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*
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* Emits 'processing-done' event when it is done processing the current
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* keypress, search request or selection from the list, whether that led to a
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* search or not.
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*
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* @constructor
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* @param InspectorPanel aInspector
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* The InspectorPanel whose `walker` attribute should be used for
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* document traversal.
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* @param nsiInputElement aInputNode
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* The input element to which the panel will be attached and from where
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* search input will be taken.
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*/
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function SelectorSearch(aInspector, aInputNode) {
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this.inspector = aInspector;
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this.searchBox = aInputNode;
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this.panelDoc = this.searchBox.ownerDocument;
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// initialize variables.
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this._lastSearched = null;
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this._lastValidSearch = "";
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this._lastToLastValidSearch = null;
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this._searchResults = null;
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this._searchSuggestions = {};
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this._searchIndex = 0;
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// bind!
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this._showPopup = this._showPopup.bind(this);
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this._onHTMLSearch = this._onHTMLSearch.bind(this);
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this._onSearchKeypress = this._onSearchKeypress.bind(this);
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this._onListBoxKeypress = this._onListBoxKeypress.bind(this);
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// Options for the AutocompletePopup.
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let options = {
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panelId: "inspector-searchbox-panel",
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listBoxId: "searchbox-panel-listbox",
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autoSelect: true,
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position: "before_start",
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direction: "ltr",
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theme: "auto",
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onClick: this._onListBoxKeypress,
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onKeypress: this._onListBoxKeypress
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};
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this.searchPopup = new AutocompletePopup(this.panelDoc, options);
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// event listeners.
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this.searchBox.addEventListener("command", this._onHTMLSearch, true);
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this.searchBox.addEventListener("keypress", this._onSearchKeypress, true);
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// For testing, we need to be able to wait for the most recent node request
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// to finish. Tests can watch this promise for that.
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this._lastQuery = promise.resolve(null);
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EventEmitter.decorate(this);
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}
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exports.SelectorSearch = SelectorSearch;
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SelectorSearch.prototype = {
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get walker() this.inspector.walker,
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// The possible states of the query.
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States: {
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CLASS: "class",
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ID: "id",
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TAG: "tag",
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},
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// The current state of the query.
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_state: null,
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// The query corresponding to last state computation.
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_lastStateCheckAt: null,
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/**
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* Computes the state of the query. State refers to whether the query
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* currently requires a class suggestion, or a tag, or an Id suggestion.
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* This getter will effectively compute the state by traversing the query
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* character by character each time the query changes.
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*
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* @example
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* '#f' requires an Id suggestion, so the state is States.ID
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* 'div > .foo' requires class suggestion, so state is States.CLASS
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*/
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get state() {
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if (!this.searchBox || !this.searchBox.value) {
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return null;
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}
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let query = this.searchBox.value;
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if (this._lastStateCheckAt == query) {
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// If query is the same, return early.
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return this._state;
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}
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this._lastStateCheckAt = query;
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this._state = null;
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let subQuery = "";
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// Now we iterate over the query and decide the state character by character.
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// The logic here is that while iterating, the state can go from one to
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// another with some restrictions. Like, if the state is Class, then it can
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// never go to Tag state without a space or '>' character; Or like, a Class
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// state with only '.' cannot go to an Id state without any [a-zA-Z] after
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// the '.' which means that '.#' is a selector matching a class name '#'.
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// Similarily for '#.' which means a selctor matching an id '.'.
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for (let i = 1; i <= query.length; i++) {
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// Calculate the state.
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subQuery = query.slice(0, i);
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let [secondLastChar, lastChar] = subQuery.slice(-2);
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switch (this._state) {
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case null:
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// This will happen only in the first iteration of the for loop.
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lastChar = secondLastChar;
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case this.States.TAG:
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this._state = lastChar == "."
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? this.States.CLASS
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: lastChar == "#"
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? this.States.ID
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: this.States.TAG;
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break;
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case this.States.CLASS:
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if (subQuery.match(/[\.]+[^\.]*$/)[0].length > 2) {
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// Checks whether the subQuery has atleast one [a-zA-Z] after the '.'.
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this._state = (lastChar == " " || lastChar == ">")
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? this.States.TAG
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: lastChar == "#"
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? this.States.ID
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: this.States.CLASS;
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}
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break;
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case this.States.ID:
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if (subQuery.match(/[#]+[^#]*$/)[0].length > 2) {
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// Checks whether the subQuery has atleast one [a-zA-Z] after the '#'.
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this._state = (lastChar == " " || lastChar == ">")
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? this.States.TAG
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: lastChar == "."
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? this.States.CLASS
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: this.States.ID;
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}
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break;
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}
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}
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return this._state;
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},
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/**
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* Removes event listeners and cleans up references.
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*/
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destroy: function() {
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// event listeners.
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this.searchBox.removeEventListener("command", this._onHTMLSearch, true);
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this.searchBox.removeEventListener("keypress", this._onSearchKeypress, true);
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this.searchPopup.destroy();
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this.searchPopup = null;
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this.searchBox = null;
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this.panelDoc = null;
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this._searchResults = null;
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this._searchSuggestions = null;
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},
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_selectResult: function(index) {
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return this._searchResults.item(index).then(node => {
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this.inspector.selection.setNodeFront(node, "selectorsearch");
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});
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},
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/**
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* The command callback for the input box. This function is automatically
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* invoked as the user is typing if the input box type is search.
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*/
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_onHTMLSearch: function() {
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let query = this.searchBox.value;
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if (query == this._lastSearched) {
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this.emit("processing-done");
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return;
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}
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this._lastSearched = query;
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this._searchResults = [];
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this._searchIndex = 0;
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if (query.length == 0) {
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this._lastValidSearch = "";
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this.searchBox.removeAttribute("filled");
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this.searchBox.classList.remove("devtools-no-search-result");
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if (this.searchPopup.isOpen) {
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this.searchPopup.hidePopup();
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}
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this.emit("processing-done");
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return;
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}
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this.searchBox.setAttribute("filled", true);
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let queryList = null;
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this._lastQuery = this.walker.querySelectorAll(this.walker.rootNode, query).then(list => {
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return list;
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}, (err) => {
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// Failures are ok here, just use a null item list;
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return null;
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}).then(queryList => {
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// Value has changed since we started this request, we're done.
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if (query != this.searchBox.value) {
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if (queryList) {
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queryList.release();
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}
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return promise.reject(null);
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}
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this._searchResults = queryList || [];
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if (this._searchResults && this._searchResults.length > 0) {
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this._lastValidSearch = query;
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// Even though the selector matched atleast one node, there is still
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// possibility of suggestions.
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if (query.match(/[\s>+]$/)) {
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// If the query has a space or '>' at the end, create a selector to match
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// the children of the selector inside the search box by adding a '*'.
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this._lastValidSearch += "*";
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}
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else if (query.match(/[\s>+][\.#a-zA-Z][\.#>\s+]*$/)) {
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// If the query is a partial descendant selector which does not matches
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// any node, remove the last incomplete part and add a '*' to match
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// everything. For ex, convert 'foo > b' to 'foo > *' .
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let lastPart = query.match(/[\s>+][\.#a-zA-Z][^>\s+]*$/)[0];
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this._lastValidSearch = query.slice(0, -1 * lastPart.length + 1) + "*";
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}
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if (!query.slice(-1).match(/[\.#\s>+]/)) {
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// Hide the popup if we have some matching nodes and the query is not
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// ending with [.# >] which means that the selector is not at the
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// beginning of a new class, tag or id.
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if (this.searchPopup.isOpen) {
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this.searchPopup.hidePopup();
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}
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this.searchBox.classList.remove("devtools-no-search-result");
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return this._selectResult(0);
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}
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return this._selectResult(0).then(() => {
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this.searchBox.classList.remove("devtools-no-search-result");
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}).then(() => this.showSuggestions());
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}
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if (query.match(/[\s>+]$/)) {
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this._lastValidSearch = query + "*";
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}
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else if (query.match(/[\s>+][\.#a-zA-Z][\.#>\s+]*$/)) {
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let lastPart = query.match(/[\s+>][\.#a-zA-Z][^>\s+]*$/)[0];
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this._lastValidSearch = query.slice(0, -1 * lastPart.length + 1) + "*";
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}
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this.searchBox.classList.add("devtools-no-search-result");
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return this.showSuggestions();
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}).then(() => this.emit("processing-done"));
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},
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/**
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* Handles keypresses inside the input box.
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*/
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_onSearchKeypress: function(aEvent) {
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let query = this.searchBox.value;
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switch(aEvent.keyCode) {
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case aEvent.DOM_VK_RETURN:
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if (query == this._lastSearched && this._searchResults) {
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this._searchIndex = (this._searchIndex + 1) % this._searchResults.length;
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}
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else {
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this._onHTMLSearch();
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return;
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}
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break;
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case aEvent.DOM_VK_UP:
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if (this.searchPopup.isOpen && this.searchPopup.itemCount > 0) {
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this.searchPopup.focus();
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if (this.searchPopup.selectedIndex == this.searchPopup.itemCount - 1) {
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this.searchPopup.selectedIndex =
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Math.max(0, this.searchPopup.itemCount - 2);
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}
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else {
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this.searchPopup.selectedIndex = this.searchPopup.itemCount - 1;
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}
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this.searchBox.value = this.searchPopup.selectedItem.label;
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}
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else if (--this._searchIndex < 0) {
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this._searchIndex = this._searchResults.length - 1;
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}
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break;
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case aEvent.DOM_VK_DOWN:
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if (this.searchPopup.isOpen && this.searchPopup.itemCount > 0) {
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this.searchPopup.focus();
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this.searchPopup.selectedIndex = 0;
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this.searchBox.value = this.searchPopup.selectedItem.label;
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}
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this._searchIndex = (this._searchIndex + 1) % this._searchResults.length;
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break;
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case aEvent.DOM_VK_TAB:
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if (this.searchPopup.isOpen &&
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this.searchPopup.getItemAtIndex(this.searchPopup.itemCount - 1)
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.preLabel == query) {
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this.searchPopup.selectedIndex = this.searchPopup.itemCount - 1;
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this.searchBox.value = this.searchPopup.selectedItem.label;
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this._onHTMLSearch();
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}
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break;
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case aEvent.DOM_VK_BACK_SPACE:
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case aEvent.DOM_VK_DELETE:
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// need to throw away the lastValidSearch.
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this._lastToLastValidSearch = null;
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// This gets the most complete selector from the query. For ex.
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// '.foo.ba' returns '.foo' , '#foo > .bar.baz' returns '#foo > .bar'
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// '.foo +bar' returns '.foo +' and likewise.
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this._lastValidSearch = (query.match(/(.*)[\.#][^\.# ]{0,}$/) ||
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query.match(/(.*[\s>+])[a-zA-Z][^\.# ]{0,}$/) ||
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["",""])[1];
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return;
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default:
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return;
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}
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aEvent.preventDefault();
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aEvent.stopPropagation();
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if (this._searchResults && this._searchResults.length > 0) {
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this._lastQuery = this._selectResult(this._searchIndex).then(() => this.emit("processing-done"));
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}
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else {
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this.emit("processing-done");
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}
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},
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/**
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* Handles keypress and mouse click on the suggestions richlistbox.
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*/
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_onListBoxKeypress: function(aEvent) {
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switch(aEvent.keyCode || aEvent.button) {
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case aEvent.DOM_VK_RETURN:
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case aEvent.DOM_VK_TAB:
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case 0: // left mouse button
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aEvent.stopPropagation();
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aEvent.preventDefault();
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this.searchBox.value = this.searchPopup.selectedItem.label;
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this.searchBox.focus();
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this._onHTMLSearch();
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break;
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case aEvent.DOM_VK_UP:
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if (this.searchPopup.selectedIndex == 0) {
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this.searchPopup.selectedIndex = -1;
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aEvent.stopPropagation();
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aEvent.preventDefault();
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this.searchBox.focus();
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}
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else {
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let index = this.searchPopup.selectedIndex;
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this.searchBox.value = this.searchPopup.getItemAtIndex(index - 1).label;
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}
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break;
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case aEvent.DOM_VK_DOWN:
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if (this.searchPopup.selectedIndex == this.searchPopup.itemCount - 1) {
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this.searchPopup.selectedIndex = -1;
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aEvent.stopPropagation();
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aEvent.preventDefault();
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this.searchBox.focus();
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}
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else {
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let index = this.searchPopup.selectedIndex;
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this.searchBox.value = this.searchPopup.getItemAtIndex(index + 1).label;
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}
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break;
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case aEvent.DOM_VK_BACK_SPACE:
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aEvent.stopPropagation();
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aEvent.preventDefault();
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this.searchBox.focus();
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if (this.searchBox.selectionStart > 0) {
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this.searchBox.value =
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this.searchBox.value.substring(0, this.searchBox.selectionStart - 1);
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}
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this._lastToLastValidSearch = null;
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let query = this.searchBox.value;
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this._lastValidSearch = (query.match(/(.*)[\.#][^\.# ]{0,}$/) ||
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query.match(/(.*[\s>+])[a-zA-Z][^\.# ]{0,}$/) ||
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["",""])[1];
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this._onHTMLSearch();
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break;
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}
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this.emit("processing-done");
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},
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/**
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* Populates the suggestions list and show the suggestion popup.
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*/
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_showPopup: function(aList, aFirstPart) {
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let total = 0;
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let query = this.searchBox.value;
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let toLowerCase = false;
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let items = [];
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// In case of tagNames, change the case to small.
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if (query.match(/.*[\.#][^\.#]{0,}$/) == null) {
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toLowerCase = true;
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}
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for (let [value, count] of aList) {
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// for cases like 'div ' or 'div >' or 'div+'
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if (query.match(/[\s>+]$/)) {
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value = query + value;
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}
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// for cases like 'div #a' or 'div .a' or 'div > d' and likewise
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else if (query.match(/[\s>+][\.#a-zA-Z][^\s>+\.#]*$/)) {
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let lastPart = query.match(/[\s>+][\.#a-zA-Z][^>\s+\.#]*$/)[0];
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value = query.slice(0, -1 * lastPart.length + 1) + value;
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}
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// for cases like 'div.class' or '#foo.bar' and likewise
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else if (query.match(/[a-zA-Z][#\.][^#\.\s+>]*$/)) {
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let lastPart = query.match(/[a-zA-Z][#\.][^#\.\s>+]*$/)[0];
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value = query.slice(0, -1 * lastPart.length + 1) + value;
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}
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let item = {
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preLabel: query,
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label: value,
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count: count
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};
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if (toLowerCase) {
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item.label = value.toLowerCase();
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}
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items.unshift(item);
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if (++total > MAX_SUGGESTIONS - 1) {
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break;
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}
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}
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if (total > 0) {
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this.searchPopup.setItems(items);
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this.searchPopup.openPopup(this.searchBox);
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}
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else {
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this.searchPopup.hidePopup();
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}
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},
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/**
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* Suggests classes,ids and tags based on the user input as user types in the
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* searchbox.
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*/
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showSuggestions: function() {
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let query = this.searchBox.value;
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let firstPart = "";
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if (this.state == this.States.TAG) {
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// gets the tag that is being completed. For ex. 'div.foo > s' returns 's',
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// 'di' returns 'di' and likewise.
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firstPart = (query.match(/[\s>+]?([a-zA-Z]*)$/) || ["", query])[1];
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query = query.slice(0, query.length - firstPart.length);
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}
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else if (this.state == this.States.CLASS) {
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// gets the class that is being completed. For ex. '.foo.b' returns 'b'
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firstPart = query.match(/\.([^\.]*)$/)[1];
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query = query.slice(0, query.length - firstPart.length - 1);
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}
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else if (this.state == this.States.ID) {
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// gets the id that is being completed. For ex. '.foo#b' returns 'b'
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firstPart = query.match(/#([^#]*)$/)[1];
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query = query.slice(0, query.length - firstPart.length - 1);
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}
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// TODO: implement some caching so that over the wire request is not made
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// everytime.
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if (/[\s+>~]$/.test(query)) {
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query += "*";
|
|
}
|
|
this._currentSuggesting = query;
|
|
return this.walker.getSuggestionsForQuery(query, firstPart, this.state).then(result => {
|
|
if (this._currentSuggesting != result.query) {
|
|
// This means that this response is for a previous request and the user
|
|
// as since typed something extra leading to a new request.
|
|
return;
|
|
}
|
|
this._lastToLastValidSearch = this._lastValidSearch;
|
|
if (this.state == this.States.CLASS) {
|
|
firstPart = "." + firstPart;
|
|
}
|
|
else if (this.state == this.States.ID) {
|
|
firstPart = "#" + firstPart;
|
|
}
|
|
this._showPopup(result.suggestions, firstPart);
|
|
});
|
|
}
|
|
};
|