mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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550 lines
19 KiB
JavaScript
550 lines
19 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 = Components.utils;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "AutocompletePopup",
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"resource:///modules/devtools/AutocompletePopup.jsm");
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this.EXPORTED_SYMBOLS = ["SelectorSearch"];
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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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* @constructor
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* @param nsIDOMDocument aContentDocument
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* The content document which inspector is attached to.
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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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* @param Function aCallback
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* The method to callback when a search is available.
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* This method is called with the matched node as the first argument.
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*/
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this.SelectorSearch = function(aContentDocument, aInputNode, aCallback) {
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this.doc = aContentDocument;
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this.callback = aCallback;
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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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fixedWidth: true,
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autoSelect: true,
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position: "before_start",
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direction: "ltr",
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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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}
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this.SelectorSearch.prototype = {
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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 SelectorSearch_destroy() {
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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.doc = 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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this.callback = null;
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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 SelectorSearch__onHTMLSearch() {
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let query = this.searchBox.value;
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if (query == this._lastSearched) {
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return;
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}
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this._lastSearched = query;
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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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return;
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}
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this.searchBox.setAttribute("filled", true);
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try {
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this._searchResults = this.doc.querySelectorAll(query);
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}
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catch (ex) {
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this._searchResults = [];
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}
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if (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+]*$/)[0];
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this._lastValidSearch = query.slice(0, -1 * lastPart.length + 1) + "*";
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}
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if (!query.slice(-1).match(/[\.#\s>+]/)) {
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// Hide the popup if we have some matching nodes and the query is not
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// ending with [.# >] which means that the selector is not at the
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// beginning of a new class, tag or id.
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if (this.searchPopup.isOpen) {
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this.searchPopup.hidePopup();
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}
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}
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else {
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this.showSuggestions();
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}
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this.searchBox.classList.remove("devtools-no-search-result");
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this.callback(this._searchResults[0]);
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}
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else {
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if (query.match(/[\s>+]$/)) {
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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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this.showSuggestions();
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}
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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 SelectorSearch__onSearchKeypress(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_ENTER:
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case aEvent.DOM_VK_RETURN:
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if (query == this._lastSearched) {
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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.length > 0) {
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this.callback(this._searchResults[this._searchIndex]);
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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 SelectorSearch__onListBoxKeypress(aEvent) {
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switch(aEvent.keyCode || aEvent.button) {
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case aEvent.DOM_VK_ENTER:
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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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},
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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 SelectorSearch__showPopup(aList, aFirstPart) {
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// Sort alphabetically in increaseing order.
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aList = aList.sort();
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// Sort based on count= in decreasing order.
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aList = aList.sort(function([a1,a2], [b1,b2]) {
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return a2 < b2;
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});
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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 SelectorSearch_showSuggestions() {
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let query = this.searchBox.value;
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if (this._lastValidSearch != "" &&
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this._lastToLastValidSearch != this._lastValidSearch) {
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this._searchSuggestions = {
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ids: new Map(),
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classes: new Map(),
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tags: new Map(),
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};
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let nodes = [];
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try {
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nodes = this.doc.querySelectorAll(this._lastValidSearch);
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} catch (ex) {}
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for (let node of nodes) {
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this._searchSuggestions.ids.set(node.id, 1);
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this._searchSuggestions.tags
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.set(node.tagName,
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(this._searchSuggestions.tags.get(node.tagName) || 0) + 1);
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for (let className of node.classList) {
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this._searchSuggestions.classes
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.set(className,
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(this._searchSuggestions.classes.get(className) || 0) + 1);
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}
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}
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this._lastToLastValidSearch = this._lastValidSearch;
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}
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else if (this._lastToLastValidSearch != this._lastValidSearch) {
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this._searchSuggestions = {
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ids: new Map(),
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classes: new Map(),
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tags: new Map(),
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};
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if (query.length == 0) {
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return;
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}
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let nodes = null;
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if (this.state == this.States.CLASS) {
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nodes = this.doc.querySelectorAll("[class]");
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for (let node of nodes) {
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for (let className of node.classList) {
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this._searchSuggestions.classes
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.set(className,
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(this._searchSuggestions.classes.get(className) || 0) + 1);
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}
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}
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}
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else if (this.state == this.States.ID) {
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nodes = this.doc.querySelectorAll("[id]");
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for (let node of nodes) {
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this._searchSuggestions.ids.set(node.id, 1);
|
|
}
|
|
}
|
|
else if (this.state == this.States.TAG) {
|
|
nodes = this.doc.getElementsByTagName("*");
|
|
for (let node of nodes) {
|
|
this._searchSuggestions.tags
|
|
.set(node.tagName,
|
|
(this._searchSuggestions.tags.get(node.tagName) || 0) + 1);
|
|
}
|
|
}
|
|
else {
|
|
return;
|
|
}
|
|
this._lastToLastValidSearch = this._lastValidSearch;
|
|
}
|
|
|
|
// Filter the suggestions based on search box value.
|
|
let result = [];
|
|
let firstPart = "";
|
|
if (this.state == this.States.TAG) {
|
|
// gets the tag that is being completed. For ex. 'div.foo > s' returns 's',
|
|
// 'di' returns 'di' and likewise.
|
|
firstPart = (query.match(/[\s>+]?([a-zA-Z]*)$/) || ["",query])[1];
|
|
for (let [tag, count] of this._searchSuggestions.tags) {
|
|
if (tag.toLowerCase().startsWith(firstPart.toLowerCase())) {
|
|
result.push([tag, count]);
|
|
}
|
|
}
|
|
}
|
|
else if (this.state == this.States.CLASS) {
|
|
// gets the class that is being completed. For ex. '.foo.b' returns 'b'
|
|
firstPart = query.match(/\.([^\.]*)$/)[1];
|
|
for (let [className, count] of this._searchSuggestions.classes) {
|
|
if (className.startsWith(firstPart)) {
|
|
result.push(["." + className, count]);
|
|
}
|
|
}
|
|
firstPart = "." + firstPart;
|
|
}
|
|
else if (this.state == this.States.ID) {
|
|
// gets the id that is being completed. For ex. '.foo#b' returns 'b'
|
|
firstPart = query.match(/#([^#]*)$/)[1];
|
|
for (let [id, count] of this._searchSuggestions.ids) {
|
|
if (id.startsWith(firstPart)) {
|
|
result.push(["#" + id, 1]);
|
|
}
|
|
}
|
|
firstPart = "#" + firstPart;
|
|
}
|
|
|
|
this._showPopup(result, firstPart);
|
|
},
|
|
};
|