michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: "use strict";
michael@0: 
michael@0: var FindHelper = {
michael@0:   _finder: null,
michael@0:   _targetTab: null,
michael@0:   _initialViewport: null,
michael@0:   _viewportChanged: false,
michael@0: 
michael@0:   observe: function(aMessage, aTopic, aData) {
michael@0:     switch(aTopic) {
michael@0:       case "FindInPage:Find":
michael@0:         this.doFind(aData);
michael@0:         break;
michael@0: 
michael@0:       case "FindInPage:Prev":
michael@0:         this.findAgain(aData, true);
michael@0:         break;
michael@0: 
michael@0:       case "FindInPage:Next":
michael@0:         this.findAgain(aData, false);
michael@0:         break;
michael@0: 
michael@0:       case "Tab:Selected":
michael@0:       case "FindInPage:Closed":
michael@0:         this.findClosed();
michael@0:         break;
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   doFind: function(aSearchString) {
michael@0:     if (!this._finder) {
michael@0:       this._targetTab = BrowserApp.selectedTab;
michael@0:       this._finder = this._targetTab.browser.finder;
michael@0:       this._finder.addResultListener(this);
michael@0:       this._initialViewport = JSON.stringify(this._targetTab.getViewport());
michael@0:       this._viewportChanged = false;
michael@0:     }
michael@0: 
michael@0:     this._finder.fastFind(aSearchString, false);
michael@0:   },
michael@0: 
michael@0:   findAgain: function(aString, aFindBackwards) {
michael@0:     // This can happen if the user taps next/previous after re-opening the search bar
michael@0:     if (!this._finder) {
michael@0:       this.doFind(aString);
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     this._finder.findAgain(aFindBackwards, false, false);
michael@0:   },
michael@0: 
michael@0:   findClosed: function() {
michael@0:     // If there's no find in progress, there's nothing to clean up
michael@0:     if (!this._finder)
michael@0:       return;
michael@0: 
michael@0:     this._finder.removeSelection();
michael@0:     this._finder.removeResultListener(this);
michael@0:     this._finder = null;
michael@0:     this._targetTab = null;
michael@0:     this._initialViewport = null;
michael@0:     this._viewportChanged = false;
michael@0:   },
michael@0: 
michael@0:   onFindResult: function(aData) {
michael@0:     if (aData.result == Ci.nsITypeAheadFind.FIND_NOTFOUND) {
michael@0:       if (this._viewportChanged) {
michael@0:         if (this._targetTab != BrowserApp.selectedTab) {
michael@0:           // this should never happen
michael@0:           Cu.reportError("Warning: selected tab changed during find!");
michael@0:           // fall through and restore viewport on the initial tab anyway
michael@0:         }
michael@0:         this._targetTab.setViewport(JSON.parse(this._initialViewport));
michael@0:         this._targetTab.sendViewportUpdate();
michael@0:       }
michael@0:     } else {
michael@0:       // Disabled until bug 1014113 is fixed
michael@0:       //ZoomHelper.zoomToRect(aData.rect, -1, false, true);
michael@0:       this._viewportChanged = true;
michael@0:     }
michael@0:   }
michael@0: };