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697 lines
23 KiB
JavaScript
697 lines
23 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"];
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const Ci = Components.interfaces;
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const Cc = Components.classes;
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const Cu = Components.utils;
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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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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._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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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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}
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Finder.prototype = {
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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 (aSearchString, aResult, aFindBackwards, aDrawOutline) {
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this._searchString = aSearchString;
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this._outlineLink(aDrawOutline);
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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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if (!this._textToSubURIService) {
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this._textToSubURIService = Cc["@mozilla.org/intl/texttosuburi;1"]
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.getService(Ci.nsITextToSubURI);
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}
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linkURL = this._textToSubURIService.unEscapeURIForUI(docCharset, foundLink.href);
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}
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let data = {
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result: aResult,
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findBackwards: aFindBackwards,
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linkURL: linkURL,
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rect: this._getResultRect(),
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searchString: this._searchString,
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};
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for (let l of this._listeners) {
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l.onFindResult(data);
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}
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},
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get searchString() {
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return this._searchString;
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},
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set caseSensitive(aSensitive) {
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this._fastFind.caseSensitive = aSensitive;
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},
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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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let result = this._fastFind.find(aSearchString, aLinksOnly);
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let searchString = this._fastFind.searchString;
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this._notify(searchString, result, false, aDrawOutline);
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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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let result = this._fastFind.findAgain(aFindBackwards, aLinksOnly);
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let searchString = this._fastFind.searchString;
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this._notify(searchString, result, aFindBackwards, aDrawOutline);
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},
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highlight: function (aHighlight, aWord) {
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let found = this._highlight(aHighlight, aWord, null);
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if (aHighlight) {
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let result = found ? Ci.nsITypeAheadFind.FIND_FOUND
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: Ci.nsITypeAheadFind.FIND_NOTFOUND;
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this._notify(aWord, result, false, false);
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}
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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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},
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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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if (!l.shouldFocusContent())
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return;
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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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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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_getWindow: function () {
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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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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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}
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}
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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);
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},
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_outlineLink: function (aDrawOutline) {
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let foundLink = this._fastFind.foundLink;
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// Optimization: We are drawing outlines and we matched
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// the same link before, so don't duplicate work.
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if (foundLink == this._previousLink && aDrawOutline)
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return;
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this._restoreOriginalOutline();
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if (foundLink && aDrawOutline) {
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// Backup original outline
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this._tmpOutline = foundLink.style.outline;
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this._tmpOutlineOffset = foundLink.style.outlineOffset;
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// Draw pseudo focus rect
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// XXX Should we change the following style for FAYT pseudo focus?
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// XXX Shouldn't we change default design if outline is visible
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// already?
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// Don't set the outline-color, we should always use initial value.
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foundLink.style.outline = "1px dotted";
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foundLink.style.outlineOffset = "0";
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this._previousLink = foundLink;
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}
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},
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_restoreOriginalOutline: function () {
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// Removes the outline around the last found link.
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if (this._previousLink) {
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this._previousLink.style.outline = this._tmpOutline;
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this._previousLink.style.outlineOffset = this._tmpOutlineOffset;
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this._previousLink = null;
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}
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},
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_highlight: function (aHighlight, aWord, aWindow) {
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let win = aWindow || this._getWindow();
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let found = false;
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for (let i = 0; win.frames && i < win.frames.length; i++) {
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if (this._highlight(aHighlight, aWord, win.frames[i]))
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found = true;
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}
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let controller = this._getSelectionController(win);
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let doc = win.document;
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if (!controller || !doc || !doc.documentElement) {
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// Without the selection controller,
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// we are unable to (un)highlight any matches
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return found;
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}
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let body = (doc instanceof Ci.nsIDOMHTMLDocument && doc.body) ?
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doc.body : doc.documentElement;
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if (aHighlight) {
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let searchRange = doc.createRange();
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searchRange.selectNodeContents(body);
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let startPt = searchRange.cloneRange();
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startPt.collapse(true);
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let endPt = searchRange.cloneRange();
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endPt.collapse(false);
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let retRange = null;
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let finder = Cc["@mozilla.org/embedcomp/rangefind;1"]
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.createInstance()
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.QueryInterface(Ci.nsIFind);
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finder.caseSensitive = this._fastFind.caseSensitive;
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while ((retRange = finder.Find(aWord, searchRange,
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startPt, endPt))) {
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this._highlightRange(retRange, controller);
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startPt = retRange.cloneRange();
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startPt.collapse(false);
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found = true;
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}
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} else {
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// First, attempt to remove highlighting from main document
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let sel = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
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sel.removeAllRanges();
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// Next, check our editor cache, for editors belonging to this
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// document
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if (this._editors) {
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for (let x = this._editors.length - 1; x >= 0; --x) {
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if (this._editors[x].document == doc) {
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sel = this._editors[x].selectionController
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.getSelection(Ci.nsISelectionController.SELECTION_FIND);
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sel.removeAllRanges();
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// We don't need to listen to this editor any more
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this._unhookListenersAtIndex(x);
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}
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}
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}
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// Removing the highlighting always succeeds, so return true.
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found = true;
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}
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return found;
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},
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_highlightRange: function(aRange, aController) {
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let node = aRange.startContainer;
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let controller = aController;
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let editableNode = this._getEditableNode(node);
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if (editableNode)
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controller = editableNode.editor.selectionController;
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let findSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
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findSelection.addRange(aRange);
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if (editableNode) {
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// Highlighting added, so cache this editor, and hook up listeners
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// to ensure we deal properly with edits within the highlighting
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if (!this._editors) {
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this._editors = [];
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this._stateListeners = [];
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}
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let existingIndex = this._editors.indexOf(editableNode.editor);
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if (existingIndex == -1) {
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let x = this._editors.length;
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this._editors[x] = editableNode.editor;
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this._stateListeners[x] = this._createStateListener();
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this._editors[x].addEditActionListener(this);
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this._editors[x].addDocumentStateListener(this._stateListeners[x]);
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}
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}
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},
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_getSelectionController: function(aWindow) {
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// display: none iframes don't have a selection controller, see bug 493658
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if (!aWindow.innerWidth || !aWindow.innerHeight)
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return null;
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// Yuck. See bug 138068.
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let docShell = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebNavigation)
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.QueryInterface(Ci.nsIDocShell);
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let controller = docShell.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsISelectionDisplay)
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.QueryInterface(Ci.nsISelectionController);
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return controller;
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},
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/*
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* For a given node, walk up it's parent chain, to try and find an
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* editable node.
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*
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* @param aNode the node we want to check
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* @returns the first node in the parent chain that is editable,
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* null if there is no such node
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*/
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_getEditableNode: function (aNode) {
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while (aNode) {
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if (aNode instanceof Ci.nsIDOMNSEditableElement)
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return aNode.editor ? aNode : null;
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aNode = aNode.parentNode;
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}
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return null;
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},
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/*
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* Helper method to unhook listeners, remove cached editors
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* and keep the relevant arrays in sync
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*
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* @param aIndex the index into the array of editors/state listeners
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* we wish to remove
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*/
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_unhookListenersAtIndex: function (aIndex) {
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this._editors[aIndex].removeEditActionListener(this);
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this._editors[aIndex]
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.removeDocumentStateListener(this._stateListeners[aIndex]);
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this._editors.splice(aIndex, 1);
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this._stateListeners.splice(aIndex, 1);
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if (!this._editors.length) {
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delete this._editors;
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delete this._stateListeners;
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}
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},
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/*
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* Remove ourselves as an nsIEditActionListener and
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* nsIDocumentStateListener from a given cached editor
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*
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* @param aEditor the editor we no longer wish to listen to
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*/
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_removeEditorListeners: function (aEditor) {
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// aEditor is an editor that we listen to, so therefore must be
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// cached. Find the index of this editor
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let idx = this._editors.indexOf(aEditor);
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if (idx == -1)
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return;
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// Now unhook ourselves, and remove our cached copy
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this._unhookListenersAtIndex(idx);
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},
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/*
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* nsIEditActionListener logic follows
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*
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* We implement this interface to allow us to catch the case where
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* the findbar found a match in a HTML <input> or <textarea>. If the
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* user adjusts the text in some way, it will no longer match, so we
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* want to remove the highlight, rather than have it expand/contract
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* when letters are added or removed.
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*/
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/*
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* Helper method used to check whether a selection intersects with
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* some highlighting
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*
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* @param aSelectionRange the range from the selection to check
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* @param aFindRange the highlighted range to check against
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* @returns true if they intersect, false otherwise
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*/
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_checkOverlap: function (aSelectionRange, aFindRange) {
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// The ranges overlap if one of the following is true:
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// 1) At least one of the endpoints of the deleted selection
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// is in the find selection
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// 2) At least one of the endpoints of the find selection
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// is in the deleted selection
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if (aFindRange.isPointInRange(aSelectionRange.startContainer,
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aSelectionRange.startOffset))
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return true;
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if (aFindRange.isPointInRange(aSelectionRange.endContainer,
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aSelectionRange.endOffset))
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return true;
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if (aSelectionRange.isPointInRange(aFindRange.startContainer,
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aFindRange.startOffset))
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return true;
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if (aSelectionRange.isPointInRange(aFindRange.endContainer,
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aFindRange.endOffset))
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return true;
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return false;
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},
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/*
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* Helper method to determine if an edit occurred within a highlight
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*
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* @param aSelection the selection we wish to check
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* @param aNode the node we want to check is contained in aSelection
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* @param aOffset the offset into aNode that we want to check
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* @returns the range containing (aNode, aOffset) or null if no ranges
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* in the selection contain it
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*/
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_findRange: function (aSelection, aNode, aOffset) {
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let rangeCount = aSelection.rangeCount;
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let rangeidx = 0;
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let foundContainingRange = false;
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let range = null;
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// Check to see if this node is inside one of the selection's ranges
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while (!foundContainingRange && rangeidx < rangeCount) {
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range = aSelection.getRangeAt(rangeidx);
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if (range.isPointInRange(aNode, aOffset)) {
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foundContainingRange = true;
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break;
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}
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rangeidx++;
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}
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if (foundContainingRange)
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return range;
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return null;
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},
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// Start of nsIWebProgressListener implementation.
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onLocationChange: function(aWebProgress, aRequest, aLocation, aFlags) {
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if (!aWebProgress.isTopLevel)
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return;
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// Avoid leaking if we change the page.
|
|
this._previousLink = null;
|
|
},
|
|
|
|
// Start of nsIEditActionListener implementations
|
|
|
|
WillDeleteText: function (aTextNode, aOffset, aLength) {
|
|
let editor = this._getEditableNode(aTextNode).editor;
|
|
let controller = editor.selectionController;
|
|
let fSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
|
|
let range = this._findRange(fSelection, aTextNode, aOffset);
|
|
|
|
if (range) {
|
|
// Don't remove the highlighting if the deleted text is at the
|
|
// end of the range
|
|
if (aTextNode != range.endContainer ||
|
|
aOffset != range.endOffset) {
|
|
// Text within the highlight is being removed - the text can
|
|
// no longer be a match, so remove the highlighting
|
|
fSelection.removeRange(range);
|
|
if (fSelection.rangeCount == 0)
|
|
this._removeEditorListeners(editor);
|
|
}
|
|
}
|
|
},
|
|
|
|
DidInsertText: function (aTextNode, aOffset, aString) {
|
|
let editor = this._getEditableNode(aTextNode).editor;
|
|
let controller = editor.selectionController;
|
|
let fSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
|
|
let range = this._findRange(fSelection, aTextNode, aOffset);
|
|
|
|
if (range) {
|
|
// If the text was inserted before the highlight
|
|
// adjust the highlight's bounds accordingly
|
|
if (aTextNode == range.startContainer &&
|
|
aOffset == range.startOffset) {
|
|
range.setStart(range.startContainer,
|
|
range.startOffset+aString.length);
|
|
} else if (aTextNode != range.endContainer ||
|
|
aOffset != range.endOffset) {
|
|
// The edit occurred within the highlight - any addition of text
|
|
// will result in the text no longer being a match,
|
|
// so remove the highlighting
|
|
fSelection.removeRange(range);
|
|
if (fSelection.rangeCount == 0)
|
|
this._removeEditorListeners(editor);
|
|
}
|
|
}
|
|
},
|
|
|
|
WillDeleteSelection: function (aSelection) {
|
|
let editor = this._getEditableNode(aSelection.getRangeAt(0)
|
|
.startContainer).editor;
|
|
let controller = editor.selectionController;
|
|
let fSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
|
|
|
|
let selectionIndex = 0;
|
|
let findSelectionIndex = 0;
|
|
let shouldDelete = {};
|
|
let numberOfDeletedSelections = 0;
|
|
let numberOfMatches = fSelection.rangeCount;
|
|
|
|
// We need to test if any ranges in the deleted selection (aSelection)
|
|
// are in any of the ranges of the find selection
|
|
// Usually both selections will only contain one range, however
|
|
// either may contain more than one.
|
|
|
|
for (let fIndex = 0; fIndex < numberOfMatches; fIndex++) {
|
|
shouldDelete[fIndex] = false;
|
|
let fRange = fSelection.getRangeAt(fIndex);
|
|
|
|
for (let index = 0; index < aSelection.rangeCount; index++) {
|
|
if (shouldDelete[fIndex])
|
|
continue;
|
|
|
|
let selRange = aSelection.getRangeAt(index);
|
|
let doesOverlap = this._checkOverlap(selRange, fRange);
|
|
if (doesOverlap) {
|
|
shouldDelete[fIndex] = true;
|
|
numberOfDeletedSelections++;
|
|
}
|
|
}
|
|
}
|
|
|
|
// OK, so now we know what matches (if any) are in the selection
|
|
// that is being deleted. Time to remove them.
|
|
if (numberOfDeletedSelections == 0)
|
|
return;
|
|
|
|
for (let i = numberOfMatches - 1; i >= 0; i--) {
|
|
if (shouldDelete[i])
|
|
fSelection.removeRange(fSelection.getRangeAt(i));
|
|
}
|
|
|
|
// Remove listeners if no more highlights left
|
|
if (fSelection.rangeCount == 0)
|
|
this._removeEditorListeners(editor);
|
|
},
|
|
|
|
/*
|
|
* nsIDocumentStateListener logic follows
|
|
*
|
|
* When attaching nsIEditActionListeners, there are no guarantees
|
|
* as to whether the findbar or the documents in the browser will get
|
|
* destructed first. This leads to the potential to either leak, or to
|
|
* hold on to a reference an editable element's editor for too long,
|
|
* preventing it from being destructed.
|
|
*
|
|
* However, when an editor's owning node is being destroyed, the editor
|
|
* sends out a DocumentWillBeDestroyed notification. We can use this to
|
|
* clean up our references to the object, to allow it to be destroyed in a
|
|
* timely fashion.
|
|
*/
|
|
|
|
/*
|
|
* Unhook ourselves when one of our state listeners has been called.
|
|
* This can happen in 4 cases:
|
|
* 1) The document the editor belongs to is navigated away from, and
|
|
* the document is not being cached
|
|
*
|
|
* 2) The document the editor belongs to is expired from the cache
|
|
*
|
|
* 3) The tab containing the owning document is closed
|
|
*
|
|
* 4) The <input> or <textarea> that owns the editor is explicitly
|
|
* removed from the DOM
|
|
*
|
|
* @param the listener that was invoked
|
|
*/
|
|
_onEditorDestruction: function (aListener) {
|
|
// First find the index of the editor the given listener listens to.
|
|
// The listeners and editors arrays must always be in sync.
|
|
// The listener will be in our array of cached listeners, as this
|
|
// method could not have been called otherwise.
|
|
let idx = 0;
|
|
while (this._stateListeners[idx] != aListener)
|
|
idx++;
|
|
|
|
// Unhook both listeners
|
|
this._unhookListenersAtIndex(idx);
|
|
},
|
|
|
|
/*
|
|
* Creates a unique document state listener for an editor.
|
|
*
|
|
* It is not possible to simply have the findbar implement the
|
|
* listener interface itself, as it wouldn't have sufficient information
|
|
* to work out which editor was being destroyed. Therefore, we create new
|
|
* listeners on the fly, and cache them in sync with the editors they
|
|
* listen to.
|
|
*/
|
|
_createStateListener: function () {
|
|
return {
|
|
findbar: this,
|
|
|
|
QueryInterface: function(aIID) {
|
|
if (aIID.equals(Ci.nsIDocumentStateListener) ||
|
|
aIID.equals(Ci.nsISupports))
|
|
return this;
|
|
|
|
throw Components.results.NS_ERROR_NO_INTERFACE;
|
|
},
|
|
|
|
NotifyDocumentWillBeDestroyed: function() {
|
|
this.findbar._onEditorDestruction(this);
|
|
},
|
|
|
|
// Unimplemented
|
|
notifyDocumentCreated: function() {},
|
|
notifyDocumentStateChanged: function(aDirty) {}
|
|
};
|
|
},
|
|
|
|
QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebProgressListener,
|
|
Ci.nsISupportsWeakReference])
|
|
};
|