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/*
* @copyright 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @author 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import _ from 'underscore'
import OC from './index'
/**
* Utility class for the history API,
* includes fallback to using the URL hash when
* the browser doesn't support the history API.
*
* @namespace OC.Util.History
*/
export default {
_handlers: [],
/**
* Push the current URL parameters to the history stack
* and change the visible URL.
* Note: this includes a workaround for IE8/IE9 that uses
* the hash part instead of the search part.
*
* @param {Object|string} params to append to the URL, can be either a string
* or a map
* @param {string} [url] URL to be used, otherwise the current URL will be used,
* using the params as query string
* @param {boolean} [replace=false] whether to replace instead of pushing
*/
_pushState: function (params, url, replace) {
var strParams;
if (typeof (params) === 'string') {
strParams = params;
} else {
strParams = OC.buildQueryString(params);
}
if (window.history.pushState) {
url = url || location.pathname + '?' + strParams;
// Workaround for bug with SVG and window.history.pushState on Firefox < 51
// https://bugzilla.mozilla.org/show_bug.cgi?id=652991
var isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox') > -1;
if (isFirefox && parseInt(navigator.userAgent.split('/').pop()) < 51) {
var patterns = document.querySelectorAll('[fill^="url(#"], [stroke^="url(#"], [filter^="url(#invert"]');
for (var i = 0, ii = patterns.length, pattern; i < ii; i++) {
pattern = patterns[i];
pattern.style.fill = pattern.style.fill;
pattern.style.stroke = pattern.style.stroke;
pattern.removeAttribute("filter");
pattern.setAttribute("filter", "url(#invert)");
}
}
if (replace) {
window.history.replaceState(params, '', url);
} else {
window.history.pushState(params, '', url);
}
}
// use URL hash for IE8
else {
window.location.hash = '?' + strParams;
// inhibit next onhashchange that just added itself
// to the event queue
this._cancelPop = true;
}
},
/**
* Push the current URL parameters to the history stack
* and change the visible URL.
* Note: this includes a workaround for IE8/IE9 that uses
* the hash part instead of the search part.
*
* @param {Object|string} params to append to the URL, can be either a string
* or a map
* @param {string} [url] URL to be used, otherwise the current URL will be used,
* using the params as query string
*/
pushState: function (params, url) {
return this._pushState(params, url, false);
},
/**
* Push the current URL parameters to the history stack
* and change the visible URL.
* Note: this includes a workaround for IE8/IE9 that uses
* the hash part instead of the search part.
*
* @param {Object|string} params to append to the URL, can be either a string
* or a map
* @param {string} [url] URL to be used, otherwise the current URL will be used,
* using the params as query string
*/
replaceState: function (params, url) {
return this._pushState(params, url, true);
},
/**
* Add a popstate handler
*
* @param handler function
*/
addOnPopStateHandler: function (handler) {
this._handlers.push(handler);
},
/**
* Parse a query string from the hash part of the URL.
* (workaround for IE8 / IE9)
*/
_parseHashQuery: function () {
var hash = window.location.hash,
pos = hash.indexOf('?');
if (pos >= 0) {
return hash.substr(pos + 1);
}
if (hash.length) {
// remove hash sign
return hash.substr(1);
}
return '';
},
_decodeQuery: function (query) {
return query.replace(/\+/g, ' ');
},
/**
* Parse the query/search part of the URL.
* Also try and parse it from the URL hash (for IE8)
*
* @return map of parameters
*/
parseUrlQuery: function () {
var query = this._parseHashQuery(),
params;
// try and parse from URL hash first
if (query) {
params = OC.parseQueryString(this._decodeQuery(query));
}
// else read from query attributes
params = _.extend(params || {}, OC.parseQueryString(this._decodeQuery(location.search)));
return params || {};
},
_onPopState: function (e) {
if (this._cancelPop) {
this._cancelPop = false;
return;
}
var params;
if (!this._handlers.length) {
return;
}
params = (e && e.state);
if (_.isString(params)) {
params = OC.parseQueryString(params);
} else if (!params) {
params = this.parseUrlQuery() || {};
}
for (var i = 0; i < this._handlers.length; i++) {
this._handlers[i](params);
}
}
}
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