408 строки
16 KiB
JavaScript
408 строки
16 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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const kSpace = " ".charCodeAt(0);
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const kSlash = "/".charCodeAt(0);
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const kApostrophe = "'".charCodeAt(0);
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Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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function findTypeController(aTypeAheadFind, aWindow)
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{
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this.mTypeAheadFind = aTypeAheadFind;
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this.mWindow = aWindow;
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}
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findTypeController.prototype = {
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/* nsIController */
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supportsCommand: function(aCommand) {
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return aCommand == "cmd_findTypeText" || aCommand == "cmd_findTypeLinks";
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},
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isCommandEnabled: function(aCommand) {
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// We can always find if there's a primary content window in which to find.
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if (this.mWindow.content)
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return true;
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// We can also find if the focused window is a content window.
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// Note: this gets called during a focus change
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// so the new window might not have focus yet.
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var commandDispatcher = this.mWindow.document.commandDispatcher;
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var e = commandDispatcher.focusedElement;
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var w = e ? e.ownerDocument.defaultView : commandDispatcher.focusedWindow;
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return w.top != this.mWindow;
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},
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doCommand: function(aCommand) {
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this.mTypeAheadFind.startFind(this.mWindow, aCommand != "cmd_findTypeText");
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},
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onEvent: function(aEvent) {
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}
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}
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function typeAheadFind()
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{
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}
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typeAheadFind.prototype = {
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/* properties required for XPCOMUtils */
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classID: Components.ID("{45c8f75b-a299-4178-a461-f63690389055}"),
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/* members */
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mBadKeysSinceMatch: 0,
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mBundle: null,
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mCurrentWindow: null,
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mEventTarget: null,
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mFind: null,
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mFindService: null,
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mFound: null,
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mLinks: false,
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mSearchString: "",
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mSelection: null,
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mTimer: null,
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mXULBrowserWindow: null,
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/* nsISupports */
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QueryInterface: XPCOMUtils.generateQI([
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Components.interfaces.nsISupportsWeakReference,
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Components.interfaces.nsIObserver,
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Components.interfaces.nsITimerCallback,
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Components.interfaces.nsIDOMEventListener,
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Components.interfaces.nsISelectionListener]),
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/* nsIObserver */
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observe: function(aSubject, aTopic, aData) {
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if (aTopic == "app-startup") {
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// It's now safe to get our pref branch.
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this.mPrefs = Components.classes["@mozilla.org/preferences-service;1"]
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.getService(Components.interfaces.nsIPrefService)
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.getBranch("accessibility.typeaheadfind.");
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// We need to add our event listeners to all windows.
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Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
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.getService(Components.interfaces.nsIWindowWatcher)
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.registerNotification(this);
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// We also need to listen for find again commands
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Components.classes["@mozilla.org/observer-service;1"]
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.getService(Components.interfaces.nsIObserverService)
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.addObserver(this, "nsWebBrowserFind_FindAgain", true);
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}
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if (aTopic == "domwindowopened") {
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// Add our listeners. They get automatically removed on window teardown.
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aSubject.controllers.appendController(new findTypeController(this, aSubject));
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aSubject.addEventListener("keypress", this, false);
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}
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if (aTopic == "nsWebBrowserFind_FindAgain" &&
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aSubject instanceof Components.interfaces.nsISupportsInterfacePointer &&
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aSubject.data instanceof Components.interfaces.nsIDOMWindow &&
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aSubject.data.top == this.mCurrentWindow &&
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this.mSearchString) {
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// It's a find again. Was it one that we just searched for?
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var w = aSubject.data;
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var find = w.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebNavigation)
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.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebBrowserFind);
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if (find.searchString.toLowerCase() == this.mSearchString) {
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var reverse = aData == "up";
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this.stopFind(false);
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var result = Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND;
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if (!this.mBadKeysSinceMatch)
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result = this.mFind.findAgain(reverse, this.mLinks);
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this.showStatusMatch(result, reverse ? "prevmatch" : "nextmatch");
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// Don't let anyone else try to find again.
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aSubject.data = null;
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}
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}
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},
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/* nsITimerCallback */
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notify: function(aTimer) {
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this.stopFind(false);
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},
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/* nsIDOMEventListener */
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handleEvent: function(aEvent) {
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if (aEvent.type != "keypress") {
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this.stopFind(false);
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return true;
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}
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// We don't care about these keys.
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if (aEvent.altKey || aEvent.ctrlKey || aEvent.metaKey)
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return true;
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// Are we already in a find?
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if (aEvent.eventPhase == Components.interfaces.nsIDOMEvent.CAPTURING_PHASE)
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return this.processKey(aEvent);
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// Check whether we want to start a new find.
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if (aEvent.defaultPrevented)
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return true;
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// We don't want to start a find on a control character.
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// We also don't want to start on a space, since that scrolls the page.
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if (aEvent.keyCode || aEvent.charCode <= kSpace)
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return true;
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// Don't start a find if the focus is an editable element.
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var window = aEvent.currentTarget;
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var element = window.document.commandDispatcher.focusedElement;
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if (element instanceof Components.interfaces.nsIDOMHTMLElement &&
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element.isContentEditable)
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return true;
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// Don't start a find if the focus is on a form element.
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if (element instanceof Components.interfaces.nsIDOMXULElement ||
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element instanceof Components.interfaces.nsIDOMHTMLEmbedElement ||
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element instanceof Components.interfaces.nsIDOMHTMLObjectElement ||
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element instanceof Components.interfaces.nsIDOMHTMLSelectElement ||
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element instanceof Components.interfaces.nsIDOMHTMLTextAreaElement)
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return true;
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// Don't start a find if the focus is on an editable field
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if (element instanceof Components.interfaces.nsIDOMHTMLInputElement &&
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element.mozIsTextField(false))
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return true;
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// Don't start a find if the focus isn't or can't be set to content
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var w = window.document.commandDispatcher.focusedWindow;
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if (w.top == window)
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w = window.content;
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if (!w)
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return true;
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var webNav = w.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebNavigation);
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try {
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// Don't start a find if the window is in design mode
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if (webNav.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIEditingSession)
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.windowIsEditable(w))
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return true;
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} catch (e) {
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}
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switch (aEvent.charCode) {
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// Start finding text as you type
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case kSlash:
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aEvent.preventDefault();
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this.startFind(window, false);
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break;
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// Start finding links as you type
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case kApostrophe:
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aEvent.preventDefault();
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this.startFind(window, true);
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break;
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default:
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// Don't start if typeahead find is disabled
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if (!this.mPrefs.getBoolPref("autostart"))
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return true;
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// Don't start in windows that don't want autostart
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if (webNav.QueryInterface(Components.interfaces.nsIDocShell)
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.chromeEventHandler.getAttribute("autofind") == "false")
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return true;
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this.startFind(window, this.mPrefs.getBoolPref("linksonly"));
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this.processKey(aEvent);
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}
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return false;
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},
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/* nsISelectionListener */
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notifySelectionChanged: function(aDoc, aSelection, aReason) {
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this.stopFind(false);
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},
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/* private methods */
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showStatus: function(aText) {
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if (this.mXULBrowserWindow)
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this.mXULBrowserWindow.setOverLink(aText, null);
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},
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showStatusString: function(aString) {
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// Set the status text from a localised string
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this.showStatus(aString && this.mBundle.GetStringFromName(aString));
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},
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showStatusMatch: function(aResult, aExtra) {
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// Set the status text from a find result
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// link|text "..." [not] found [next|previous match] [(href)]
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if (aExtra)
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aExtra = " " + this.mBundle.GetStringFromName(aExtra);
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var url = "";
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var string = this.mLinks ? "link" : "text";
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if (aResult == Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND)
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string += "not";
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else if (this.mFind.foundLink && this.mFind.foundLink.href)
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url = " " + this.mBundle.GetStringFromName("openparen") +
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this.mFind.foundLink.href +
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this.mBundle.GetStringFromName("closeparen");
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string += "found";
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this.showStatus(this.mBundle.GetStringFromName(string) +
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this.mSearchString +
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this.mBundle.GetStringFromName("closequote") +
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aExtra + url);
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},
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startTimer: function() {
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if (this.mPrefs.getBoolPref("enabletimeout")) {
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if (!this.mTimer)
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this.mTimer = Components.classes["@mozilla.org/timer;1"]
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.createInstance(Components.interfaces.nsITimer);
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this.mTimer.initWithCallback(this,
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this.mPrefs.getIntPref("timeout"),
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Components.interfaces.nsITimer.TYPE_ONE_SHOT);
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}
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},
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processKey: function(aEvent) {
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// Escape always cancels the find.
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if (aEvent.keyCode == Components.interfaces.nsIDOMKeyEvent.DOM_VK_ESCAPE) {
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aEvent.preventDefault();
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this.stopFind(false);
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return false;
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}
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var result = Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND;
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if (aEvent.keyCode == Components.interfaces.nsIDOMKeyEvent.DOM_VK_BACK_SPACE) {
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aEvent.preventDefault();
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this.mSearchString = this.mSearchString.slice(0, -1);
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// Backspacing past the start of the string cancels the find.
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if (!this.mSearchString) {
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this.stopFind(true);
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return false;
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}
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this.startTimer();
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// The find will change the selection, so stop listening for changes
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this.mEventTarget.removeEventListener("blur", this, true);
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if (this.mSelection)
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this.mSelection.removeSelectionListener(this);
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// Don't bother finding until we get back to a working string
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if (!this.mBadKeysSinceMatch || !--this.mBadKeysSinceMatch)
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result = this.mFind.find(this.mSearchString, this.mLinks);
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} else {
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// Ignore control characters.
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if (aEvent.keyCode || aEvent.charCode < kSpace)
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return true;
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this.startTimer();
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aEvent.preventDefault();
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// It looks as if the cat walked on the keyboard.
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if (this.mBadKeysSinceMatch >= 3)
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return false;
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// The find will change the selection/focus, so stop listening for changes
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this.mEventTarget.removeEventListener("blur", this, true);
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if (this.mSelection)
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this.mSelection.removeSelectionListener(this);
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var previousString = this.mSearchString;
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this.mSearchString += String.fromCharCode(aEvent.charCode).toLowerCase();
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if (!this.mBadKeysSinceMatch) {
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result = this.mFind.find(this.mSearchString, this.mLinks);
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if (previousString &&
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result == Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND)
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// Use a separate find instance to rehighlight the previous match
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// until bug 463294 is fixed.
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this.mFound.find(previousString, this.mLinks);
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}
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if (result == Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND)
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this.mBadKeysSinceMatch++;
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}
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// Ensure that the correct frame is focused (work around for bug 485213).
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if (this.mFind.currentWindow)
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this.mFind.currentWindow.focus();
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this.showStatusMatch(result, "");
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if (!this.mFindService)
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this.mFindService = Components.classes["@mozilla.org/find/find_service;1"]
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.getService(Components.interfaces.nsIFindService);
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this.mFindService.searchString = this.mSearchString;
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// Watch for blur changes in case the cursor leaves the current field.
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this.mEventTarget.addEventListener("blur", this, true);
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// Also watch for the cursor moving within the current field or window.
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var commandDispatcher = this.mEventTarget.ownerDocument.commandDispatcher;
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var editable = commandDispatcher.focusedElement;
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if (editable instanceof Components.interfaces.nsIDOMNSEditableElement)
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this.mSelection = editable.editor.selection;
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else
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this.mSelection = commandDispatcher.focusedWindow.getSelection();
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this.mSelection.QueryInterface(Components.interfaces.nsISelectionPrivate)
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.addSelectionListener(this);
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return false;
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},
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startFind: function(aWindow, aLinks) {
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if (this.mEventTarget)
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this.stopFind(true);
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// Try to get the status bar for the specified window
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this.mXULBrowserWindow =
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aWindow.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebNavigation)
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.QueryInterface(Components.interfaces.nsIDocShellTreeItem)
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.treeOwner
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.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIXULWindow)
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.XULBrowserWindow;
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// If the current window is chrome then focus content instead
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var w = aWindow.document.commandDispatcher.focusedWindow.top;
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if (w == aWindow)
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(w = aWindow.content).focus();
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// Get two toolkit typeaheadfind instances if we don't have them already.
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var docShell = w.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIWebNavigation)
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.QueryInterface(Components.interfaces.nsIDocShell);
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if (!this.mFind) {
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this.mFind = Components.classes["@mozilla.org/typeaheadfind;1"]
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.createInstance(Components.interfaces.nsITypeAheadFind);
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this.mFind.init(docShell);
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this.mFound = Components.classes["@mozilla.org/typeaheadfind;1"]
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.createInstance(Components.interfaces.nsITypeAheadFind);
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this.mFound.init(docShell);
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}
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// Get the string bundle if we don't have it already.
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if (!this.mBundle)
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this.mBundle = Components.classes["@mozilla.org/intl/stringbundle;1"]
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.getService(Components.interfaces.nsIStringBundleService)
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.createBundle("chrome://communicator/locale/typeaheadfind.properties");
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// Set up all our properties
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this.mFind.setDocShell(docShell);
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this.mFound.setDocShell(docShell);
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this.mEventTarget = docShell.chromeEventHandler;
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this.mEventTarget.addEventListener("keypress", this, true);
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this.mEventTarget.addEventListener("pagehide", this, true);
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this.mCurrentWindow = w;
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this.mBadKeysSinceMatch = 0;
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this.mSearchString = "";
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this.mLinks = aLinks;
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this.showStatusString(this.mLinks ? "startlinkfind" : "starttextfind");
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this.startTimer();
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},
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stopFind: function(aClear) {
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if (this.mTimer)
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this.mTimer.cancel();
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if (this.mFind)
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this.mFind.setSelectionModeAndRepaint(
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Components.interfaces.nsISelectionController.SELECTION_ON);
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if (this.mEventTarget) {
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this.mEventTarget.removeEventListener("blur", this, true);
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this.mEventTarget.removeEventListener("pagehide", this, true);
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this.mEventTarget.removeEventListener("keypress", this, true);
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}
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this.mEventTarget = null;
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if (this.mSelection)
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this.mSelection.removeSelectionListener(this);
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this.mSelection = null;
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this.showStatusString(aClear ? "" : "stopfind");
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if (aClear)
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this.mSearchString = "";
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if (aClear && this.mFind)
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this.mFind.collapseSelection();
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},
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};
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var NSGetFactory = XPCOMUtils.generateNSGetFactory([typeAheadFind]);
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