mirror of
https://github.com/classilla/tenfourfox.git
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159 lines
4.4 KiB
JavaScript
159 lines
4.4 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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var FindHelper = {
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_finder: null,
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_targetTab: null,
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_initialViewport: null,
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_viewportChanged: false,
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_result: null,
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_limit: 0,
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observe: function(aMessage, aTopic, aData) {
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switch(aTopic) {
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case "FindInPage:Opened": {
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this._findOpened();
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break;
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}
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case "Tab:Selected": {
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// Allow for page switching.
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this._uninit();
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break;
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}
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case "FindInPage:Closed":
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this._uninit();
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this._findClosed();
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break;
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}
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},
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_findOpened: function() {
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try {
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this._limit = Services.prefs.getIntPref("accessibility.typeaheadfind.matchesCountLimit");
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} catch (e) {
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// Pref not available, assume 0, no match counting.
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this._limit = 0;
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}
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Messaging.addListener((data) => {
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this.doFind(data.searchString, data.matchCase);
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return this._getMatchesCountResult(data.searchString);
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}, "FindInPage:Find");
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Messaging.addListener((data) => {
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this.findAgain(data.searchString, false, data.matchCase);
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return this._getMatchesCountResult(data.searchString);
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}, "FindInPage:Next");
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Messaging.addListener((data) => {
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this.findAgain(data.searchString, true, data.matchCase);
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return this._getMatchesCountResult(data.searchString);
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}, "FindInPage:Prev");
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},
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_init: function() {
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// If there's no find in progress, start one.
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if (this._finder) {
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return;
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}
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this._targetTab = BrowserApp.selectedTab;
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try {
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this._finder = this._targetTab.browser.finder;
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} catch (e) {
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throw new Error("FindHelper: " + e + "\n" +
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"JS stack: \n" + (e.stack || Components.stack.formattedStack));
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}
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this._finder.addResultListener(this);
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this._initialViewport = JSON.stringify(this._targetTab.getViewport());
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this._viewportChanged = false;
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},
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_uninit: function() {
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// If there's no find in progress, there's nothing to clean up.
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if (!this._finder) {
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return;
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}
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this._finder.removeSelection();
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this._finder.removeResultListener(this);
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this._finder = null;
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this._targetTab = null;
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this._initialViewport = null;
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this._viewportChanged = false;
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},
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_findClosed: function() {
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Messaging.removeListener("FindInPage:Find");
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Messaging.removeListener("FindInPage:Next");
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Messaging.removeListener("FindInPage:Prev");
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},
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/**
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* Request, wait for, and return the current matchesCount results for a string.
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*/
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_getMatchesCountResult: function(findString) {
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// Count matches up to any provided limit.
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if (this._limit <= 0) {
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return { total: 0, current: 0, limit: 0 };
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}
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// Sync call to Finder, results available immediately.
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this._finder.requestMatchesCount(findString, this._limit);
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return this._result;
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},
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/**
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* Pass along the count results to FindInPageBar for display.
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*/
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onMatchesCountResult: function(result) {
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this._result = result;
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this._result.limit = this._limit;
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},
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doFind: function(searchString, matchCase) {
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if (!this._finder) {
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this._init();
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}
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this._finder.caseSensitive = matchCase;
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this._finder.fastFind(searchString, false);
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},
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findAgain: function(searchString, findBackwards, matchCase) {
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// This always happens if the user taps next/previous after re-opening the
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// search bar, and not only forces _init() but also an initial fastFind(STRING)
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// before any findAgain(DIRECTION).
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if (!this._finder) {
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this.doFind(searchString, matchCase);
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return;
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}
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this._finder.caseSensitive = matchCase;
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this._finder.findAgain(findBackwards, false, false);
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},
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onFindResult: function(aData) {
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if (aData.result == Ci.nsITypeAheadFind.FIND_NOTFOUND) {
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if (this._viewportChanged) {
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if (this._targetTab != BrowserApp.selectedTab) {
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// this should never happen
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Cu.reportError("Warning: selected tab changed during find!");
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// fall through and restore viewport on the initial tab anyway
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}
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this._targetTab.setViewport(JSON.parse(this._initialViewport));
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this._targetTab.sendViewportUpdate();
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}
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} else {
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// Disabled until bug 1014113 is fixed
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// ZoomHelper.zoomToRect(aData.rect);
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this._viewportChanged = true;
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}
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}
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};
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