639 lines
20 KiB
JavaScript
639 lines
20 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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this.EXPORTED_SYMBOLS = ["Finder", "GetClipboardSearchString"];
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const { interfaces: Ci, classes: Cc, utils: Cu } = Components;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Geometry.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/Task.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "BrowserUtils",
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"resource://gre/modules/BrowserUtils.jsm");
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XPCOMUtils.defineLazyServiceGetter(this, "TextToSubURIService",
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"@mozilla.org/intl/texttosuburi;1",
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"nsITextToSubURI");
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XPCOMUtils.defineLazyServiceGetter(this, "Clipboard",
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"@mozilla.org/widget/clipboard;1",
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"nsIClipboard");
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XPCOMUtils.defineLazyServiceGetter(this, "ClipboardHelper",
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"@mozilla.org/widget/clipboardhelper;1",
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"nsIClipboardHelper");
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const kSelectionMaxLen = 150;
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const kMatchesCountLimitPref = "accessibility.typeaheadfind.matchesCountLimit";
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function Finder(docShell) {
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this._fastFind = Cc["@mozilla.org/typeaheadfind;1"].createInstance(Ci.nsITypeAheadFind);
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this._fastFind.init(docShell);
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this._currentFoundRange = null;
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this._docShell = docShell;
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this._listeners = [];
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this._previousLink = null;
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this._searchString = null;
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this._highlighter = null;
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docShell.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebProgress)
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.addProgressListener(this, Ci.nsIWebProgress.NOTIFY_LOCATION);
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BrowserUtils.getRootWindow(this._docShell).addEventListener("unload",
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this.onLocationChange.bind(this, { isTopLevel: true }));
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}
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Finder.prototype = {
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get iterator() {
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if (this._iterator)
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return this._iterator;
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this._iterator = Cu.import("resource://gre/modules/FinderIterator.jsm", null).FinderIterator;
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return this._iterator;
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},
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destroy: function() {
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if (this._iterator)
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this._iterator.reset();
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let window = this._getWindow();
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if (this._highlighter && window) {
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// if we clear all the references before we hide the highlights (in both
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// highlighting modes), we simply can't use them to find the ranges we
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// need to clear from the selection.
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this._highlighter.hide(window);
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this._highlighter.clear(window);
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}
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this.listeners = [];
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this._docShell.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebProgress)
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.removeProgressListener(this, Ci.nsIWebProgress.NOTIFY_LOCATION);
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this._listeners = [];
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this._currentFoundRange = this._fastFind = this._docShell = this._previousLink =
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this._highlighter = null;
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},
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addResultListener: function (aListener) {
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if (this._listeners.indexOf(aListener) === -1)
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this._listeners.push(aListener);
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},
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removeResultListener: function (aListener) {
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this._listeners = this._listeners.filter(l => l != aListener);
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},
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_notify: function (options) {
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if (typeof options.storeResult != "boolean")
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options.storeResult = true;
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if (options.storeResult) {
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this._searchString = options.searchString;
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this.clipboardSearchString = options.searchString
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}
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let foundLink = this._fastFind.foundLink;
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let linkURL = null;
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if (foundLink) {
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let docCharset = null;
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let ownerDoc = foundLink.ownerDocument;
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if (ownerDoc)
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docCharset = ownerDoc.characterSet;
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linkURL = TextToSubURIService.unEscapeURIForUI(docCharset, foundLink.href);
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}
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options.linkURL = linkURL;
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options.rect = this._getResultRect();
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options.searchString = this._searchString;
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if (!this.iterator.continueRunning({
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caseSensitive: this._fastFind.caseSensitive,
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entireWord: this._fastFind.entireWord,
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linksOnly: options.linksOnly,
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word: options.searchString
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})) {
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this.iterator.stop();
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}
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this.highlighter.update(options);
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this.requestMatchesCount(options.searchString, options.linksOnly);
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this._outlineLink(options.drawOutline);
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for (let l of this._listeners) {
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try {
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l.onFindResult(options);
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} catch (ex) {}
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}
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},
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get searchString() {
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if (!this._searchString && this._fastFind.searchString)
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this._searchString = this._fastFind.searchString;
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return this._searchString;
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},
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get clipboardSearchString() {
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return GetClipboardSearchString(this._getWindow()
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.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebNavigation)
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.QueryInterface(Ci.nsILoadContext));
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},
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set clipboardSearchString(aSearchString) {
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if (!aSearchString || !Clipboard.supportsFindClipboard())
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return;
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ClipboardHelper.copyStringToClipboard(aSearchString,
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Ci.nsIClipboard.kFindClipboard);
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},
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set caseSensitive(aSensitive) {
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if (this._fastFind.caseSensitive === aSensitive)
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return;
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this._fastFind.caseSensitive = aSensitive;
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this.iterator.reset();
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},
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set entireWord(aEntireWord) {
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if (this._fastFind.entireWord === aEntireWord)
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return;
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this._fastFind.entireWord = aEntireWord;
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this.iterator.reset();
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},
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get highlighter() {
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if (this._highlighter)
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return this._highlighter;
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const {FinderHighlighter} = Cu.import("resource://gre/modules/FinderHighlighter.jsm", {});
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return this._highlighter = new FinderHighlighter(this);
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},
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get matchesCountLimit() {
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if (typeof this._matchesCountLimit == "number")
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return this._matchesCountLimit;
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this._matchesCountLimit = Services.prefs.getIntPref(kMatchesCountLimitPref) || 0;
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return this._matchesCountLimit;
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},
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_lastFindResult: null,
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/**
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* Used for normal search operations, highlights the first match.
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*
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* @param aSearchString String to search for.
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* @param aLinksOnly Only consider nodes that are links for the search.
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* @param aDrawOutline Puts an outline around matched links.
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*/
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fastFind: function (aSearchString, aLinksOnly, aDrawOutline) {
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this._lastFindResult = this._fastFind.find(aSearchString, aLinksOnly);
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let searchString = this._fastFind.searchString;
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this._notify({
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searchString,
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result: this._lastFindResult,
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findBackwards: false,
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findAgain: false,
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drawOutline: aDrawOutline,
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linksOnly: aLinksOnly
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});
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},
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/**
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* Repeat the previous search. Should only be called after a previous
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* call to Finder.fastFind.
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*
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* @param aFindBackwards Controls the search direction:
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* true: before current match, false: after current match.
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* @param aLinksOnly Only consider nodes that are links for the search.
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* @param aDrawOutline Puts an outline around matched links.
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*/
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findAgain: function (aFindBackwards, aLinksOnly, aDrawOutline) {
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this._lastFindResult = this._fastFind.findAgain(aFindBackwards, aLinksOnly);
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let searchString = this._fastFind.searchString;
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this._notify({
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searchString,
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result: this._lastFindResult,
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findBackwards: aFindBackwards,
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findAgain: true,
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drawOutline: aDrawOutline,
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linksOnly: aLinksOnly
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});
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},
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/**
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* Forcibly set the search string of the find clipboard to the currently
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* selected text in the window, on supported platforms (i.e. OSX).
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*/
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setSearchStringToSelection: function() {
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let searchString = this.getActiveSelectionText();
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// Empty strings are rather useless to search for.
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if (!searchString.length)
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return null;
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this.clipboardSearchString = searchString;
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return searchString;
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},
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highlight: Task.async(function* (aHighlight, aWord, aLinksOnly) {
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yield this.highlighter.highlight(aHighlight, aWord, aLinksOnly);
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}),
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getInitialSelection: function() {
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this._getWindow().setTimeout(() => {
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let initialSelection = this.getActiveSelectionText();
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for (let l of this._listeners) {
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try {
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l.onCurrentSelection(initialSelection, true);
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} catch (ex) {}
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}
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}, 0);
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},
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getActiveSelectionText: function() {
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let focusedWindow = {};
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let focusedElement =
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Services.focus.getFocusedElementForWindow(this._getWindow(), true,
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focusedWindow);
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focusedWindow = focusedWindow.value;
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let selText;
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if (focusedElement instanceof Ci.nsIDOMNSEditableElement &&
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focusedElement.editor) {
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// The user may have a selection in an input or textarea.
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selText = focusedElement.editor.selectionController
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.getSelection(Ci.nsISelectionController.SELECTION_NORMAL)
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.toString();
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} else {
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// Look for any selected text on the actual page.
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selText = focusedWindow.getSelection().toString();
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}
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if (!selText)
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return "";
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// Process our text to get rid of unwanted characters.
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selText = selText.trim().replace(/\s+/g, " ");
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let truncLength = kSelectionMaxLen;
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if (selText.length > truncLength) {
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let truncChar = selText.charAt(truncLength).charCodeAt(0);
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if (truncChar >= 0xDC00 && truncChar <= 0xDFFF)
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truncLength++;
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selText = selText.substr(0, truncLength);
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}
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return selText;
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},
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enableSelection: function() {
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this._fastFind.setSelectionModeAndRepaint(Ci.nsISelectionController.SELECTION_ON);
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this._restoreOriginalOutline();
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},
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removeSelection: function() {
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this._fastFind.collapseSelection();
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this.enableSelection();
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this.highlighter.clear(this._getWindow());
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},
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focusContent: function() {
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// Allow Finder listeners to cancel focusing the content.
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for (let l of this._listeners) {
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try {
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if ("shouldFocusContent" in l &&
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!l.shouldFocusContent())
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return;
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} catch (ex) {
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Cu.reportError(ex);
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}
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}
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let fastFind = this._fastFind;
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const fm = Cc["@mozilla.org/focus-manager;1"].getService(Ci.nsIFocusManager);
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try {
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// Try to find the best possible match that should receive focus and
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// block scrolling on focus since find already scrolls. Further
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// scrolling is due to user action, so don't override this.
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if (fastFind.foundLink) {
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fm.setFocus(fastFind.foundLink, fm.FLAG_NOSCROLL);
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} else if (fastFind.foundEditable) {
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fm.setFocus(fastFind.foundEditable, fm.FLAG_NOSCROLL);
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fastFind.collapseSelection();
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} else {
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this._getWindow().focus()
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}
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} catch (e) {}
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},
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onFindbarClose: function() {
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this.enableSelection();
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this.highlighter.highlight(false);
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this.iterator.reset();
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BrowserUtils.trackToolbarVisibility(this._docShell, "findbar", false);
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},
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onFindbarOpen: function() {
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BrowserUtils.trackToolbarVisibility(this._docShell, "findbar", true);
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},
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onModalHighlightChange(useModalHighlight) {
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if (this._highlighter)
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this._highlighter.onModalHighlightChange(useModalHighlight);
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},
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onHighlightAllChange(highlightAll) {
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if (this._highlighter)
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this._highlighter.onHighlightAllChange(highlightAll);
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if (this._iterator)
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this._iterator.reset();
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},
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keyPress: function (aEvent) {
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let controller = this._getSelectionController(this._getWindow());
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switch (aEvent.keyCode) {
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case Ci.nsIDOMKeyEvent.DOM_VK_RETURN:
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if (this._fastFind.foundLink) {
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let view = this._fastFind.foundLink.ownerDocument.defaultView;
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this._fastFind.foundLink.dispatchEvent(new view.MouseEvent("click", {
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view: view,
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cancelable: true,
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bubbles: true,
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ctrlKey: aEvent.ctrlKey,
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altKey: aEvent.altKey,
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shiftKey: aEvent.shiftKey,
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metaKey: aEvent.metaKey
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}));
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}
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break;
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case Ci.nsIDOMKeyEvent.DOM_VK_TAB:
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let direction = Services.focus.MOVEFOCUS_FORWARD;
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if (aEvent.shiftKey) {
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direction = Services.focus.MOVEFOCUS_BACKWARD;
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}
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Services.focus.moveFocus(this._getWindow(), null, direction, 0);
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break;
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case Ci.nsIDOMKeyEvent.DOM_VK_PAGE_UP:
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controller.scrollPage(false);
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break;
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case Ci.nsIDOMKeyEvent.DOM_VK_PAGE_DOWN:
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controller.scrollPage(true);
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break;
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case Ci.nsIDOMKeyEvent.DOM_VK_UP:
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controller.scrollLine(false);
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break;
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case Ci.nsIDOMKeyEvent.DOM_VK_DOWN:
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controller.scrollLine(true);
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break;
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}
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},
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_notifyMatchesCount: function(result = this._currentMatchesCountResult) {
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// The `_currentFound` property is only used for internal bookkeeping.
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delete result._currentFound;
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result.limit = this.matchesCountLimit;
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if (result.total == result.limit)
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result.total = -1;
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for (let l of this._listeners) {
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try {
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l.onMatchesCountResult(result);
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} catch (ex) {}
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}
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this._currentMatchesCountResult = null;
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},
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requestMatchesCount: function(aWord, aLinksOnly) {
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if (this._lastFindResult == Ci.nsITypeAheadFind.FIND_NOTFOUND ||
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this.searchString == "" || !aWord || !this.matchesCountLimit) {
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this._notifyMatchesCount({
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total: 0,
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current: 0
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});
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return;
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}
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let window = this._getWindow();
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this._currentFoundRange = this._fastFind.getFoundRange();
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let params = {
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caseSensitive: this._fastFind.caseSensitive,
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entireWord: this._fastFind.entireWord,
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linksOnly: aLinksOnly,
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word: aWord
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};
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if (!this.iterator.continueRunning(params))
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this.iterator.stop();
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this.iterator.start(Object.assign(params, {
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finder: this,
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limit: this.matchesCountLimit,
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listener: this,
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useCache: true,
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})).then(() => {
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// Without a valid result, there's nothing to notify about. This happens
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// when the iterator was started before and won the race.
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if (!this._currentMatchesCountResult || !this._currentMatchesCountResult.total)
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return;
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this._notifyMatchesCount();
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});
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},
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// FinderIterator listener implementation
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onIteratorRangeFound(range) {
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let result = this._currentMatchesCountResult;
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if (!result)
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return;
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++result.total;
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if (!result._currentFound) {
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++result.current;
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result._currentFound = (this._currentFoundRange &&
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range.startContainer == this._currentFoundRange.startContainer &&
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range.startOffset == this._currentFoundRange.startOffset &&
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range.endContainer == this._currentFoundRange.endContainer &&
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range.endOffset == this._currentFoundRange.endOffset);
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}
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},
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onIteratorReset() {},
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onIteratorRestart({ word, linksOnly }) {
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this.requestMatchesCount(word, linksOnly);
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},
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onIteratorStart() {
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this._currentMatchesCountResult = {
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total: 0,
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current: 0,
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_currentFound: false
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};
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},
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_getWindow: function () {
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if (!this._docShell)
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return null;
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return this._docShell.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindow);
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},
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/**
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* Get the bounding selection rect in CSS px relative to the origin of the
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* top-level content document.
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*/
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_getResultRect: function () {
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let topWin = this._getWindow();
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let win = this._fastFind.currentWindow;
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if (!win)
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return null;
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let selection = win.getSelection();
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if (!selection.rangeCount || selection.isCollapsed) {
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// The selection can be into an input or a textarea element.
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let nodes = win.document.querySelectorAll("input, textarea");
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for (let node of nodes) {
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if (node instanceof Ci.nsIDOMNSEditableElement && node.editor) {
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try {
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let sc = node.editor.selectionController;
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selection = sc.getSelection(Ci.nsISelectionController.SELECTION_NORMAL);
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if (selection.rangeCount && !selection.isCollapsed) {
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break;
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}
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} catch (e) {
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// If this textarea is hidden, then its selection controller might
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// not be intialized. Ignore the failure.
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}
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}
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}
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}
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if (!selection.rangeCount || selection.isCollapsed) {
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return null;
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}
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let utils = topWin.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils);
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let scrollX = {}, scrollY = {};
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utils.getScrollXY(false, scrollX, scrollY);
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for (let frame = win; frame != topWin; frame = frame.parent) {
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let rect = frame.frameElement.getBoundingClientRect();
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let left = frame.getComputedStyle(frame.frameElement, "").borderLeftWidth;
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let top = frame.getComputedStyle(frame.frameElement, "").borderTopWidth;
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scrollX.value += rect.left + parseInt(left, 10);
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scrollY.value += rect.top + parseInt(top, 10);
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}
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let rect = Rect.fromRect(selection.getRangeAt(0).getBoundingClientRect());
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|
return rect.translate(scrollX.value, scrollY.value);
|
|
},
|
|
|
|
_outlineLink: function (aDrawOutline) {
|
|
let foundLink = this._fastFind.foundLink;
|
|
|
|
// Optimization: We are drawing outlines and we matched
|
|
// the same link before, so don't duplicate work.
|
|
if (foundLink == this._previousLink && aDrawOutline)
|
|
return;
|
|
|
|
this._restoreOriginalOutline();
|
|
|
|
if (foundLink && aDrawOutline) {
|
|
// Backup original outline
|
|
this._tmpOutline = foundLink.style.outline;
|
|
this._tmpOutlineOffset = foundLink.style.outlineOffset;
|
|
|
|
// Draw pseudo focus rect
|
|
// XXX Should we change the following style for FAYT pseudo focus?
|
|
// XXX Shouldn't we change default design if outline is visible
|
|
// already?
|
|
// Don't set the outline-color, we should always use initial value.
|
|
foundLink.style.outline = "1px dotted";
|
|
foundLink.style.outlineOffset = "0";
|
|
|
|
this._previousLink = foundLink;
|
|
}
|
|
},
|
|
|
|
_restoreOriginalOutline: function () {
|
|
// Removes the outline around the last found link.
|
|
if (this._previousLink) {
|
|
this._previousLink.style.outline = this._tmpOutline;
|
|
this._previousLink.style.outlineOffset = this._tmpOutlineOffset;
|
|
this._previousLink = null;
|
|
}
|
|
},
|
|
|
|
_getSelectionController: function(aWindow) {
|
|
// display: none iframes don't have a selection controller, see bug 493658
|
|
try {
|
|
if (!aWindow.innerWidth || !aWindow.innerHeight)
|
|
return null;
|
|
} catch (e) {
|
|
// If getting innerWidth or innerHeight throws, we can't get a selection
|
|
// controller.
|
|
return null;
|
|
}
|
|
|
|
// Yuck. See bug 138068.
|
|
let docShell = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsIWebNavigation)
|
|
.QueryInterface(Ci.nsIDocShell);
|
|
|
|
let controller = docShell.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsISelectionDisplay)
|
|
.QueryInterface(Ci.nsISelectionController);
|
|
return controller;
|
|
},
|
|
|
|
// Start of nsIWebProgressListener implementation.
|
|
|
|
onLocationChange: function(aWebProgress, aRequest, aLocation, aFlags) {
|
|
if (!aWebProgress.isTopLevel)
|
|
return;
|
|
// Ignore events that don't change the document.
|
|
if (aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT)
|
|
return;
|
|
|
|
// Avoid leaking if we change the page.
|
|
this._lastFindResult = this._previousLink = this._currentFoundRange = null;
|
|
this.highlighter.onLocationChange();
|
|
this.iterator.reset();
|
|
},
|
|
|
|
QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebProgressListener,
|
|
Ci.nsISupportsWeakReference])
|
|
};
|
|
|
|
function GetClipboardSearchString(aLoadContext) {
|
|
let searchString = "";
|
|
if (!Clipboard.supportsFindClipboard())
|
|
return searchString;
|
|
|
|
try {
|
|
let trans = Cc["@mozilla.org/widget/transferable;1"]
|
|
.createInstance(Ci.nsITransferable);
|
|
trans.init(aLoadContext);
|
|
trans.addDataFlavor("text/unicode");
|
|
|
|
Clipboard.getData(trans, Ci.nsIClipboard.kFindClipboard);
|
|
|
|
let data = {};
|
|
let dataLen = {};
|
|
trans.getTransferData("text/unicode", data, dataLen);
|
|
if (data.value) {
|
|
data = data.value.QueryInterface(Ci.nsISupportsString);
|
|
searchString = data.toString();
|
|
}
|
|
} catch (ex) {}
|
|
|
|
return searchString;
|
|
}
|
|
|
|
this.Finder = Finder;
|
|
this.GetClipboardSearchString = GetClipboardSearchString;
|