mediawiki-extensions-Visual.../modules/ve-mw/init/ve.init.mw.Target.js
Ori Livneh 56a9484149 Filter DOM load/save deferreds through ve.track callback
Binding ve.init.mw.Target#onLoad and the anonymous function which calls ve#track
with timing data to the resolution of the same deferred makes the timing
measurement sensitive to how long it takes ve.init.mw.Target#onLoad to yield,
which in turns depends on whether the requisite ResourceLoader modules for
setting up the editing surface are ready. This muddles the definition of what
we're actually measuring, making it dependent on a race condition.

This patch moves the tracking call to a filter function through which the jqXHR
deferred is threaded. This ensures that the 'duration' datapoint on the domSave
and domLoad events captures just the time spent talking with the API.

Change-Id: I6e162014a4043d4ff9422131ae87fb25d0ab4c29
2013-10-23 22:44:27 -07:00

731 lines
21 KiB
JavaScript

/*!
* VisualEditor MediaWiki Initialization Target class.
*
* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
* @license The MIT License (MIT); see LICENSE.txt
*/
/*global mw */
/**
* Initialization MediaWiki target.
*
* @class
* @extends ve.init.Target
*
* @constructor
* @param {jQuery} $container Conainter to render target into
* @param {string} pageName Name of target page
* @param {number} [revisionId] If the editor should load a revision of the page, pass the
* revision id here. Defaults to loading the latest version (see #load).
*/
ve.init.mw.Target = function VeInitMwTarget( $container, pageName, revisionId ) {
var i, len, prefName, prefValue, conf = mw.config.get( 'wgVisualEditorConfig' ),
extraModules = [ 'experimental' ];
// Parent constructor
ve.init.Target.call( this, $container );
// Properties
this.pageName = pageName;
this.pageExists = mw.config.get( 'wgArticleId', 0 ) !== 0;
this.revid = revisionId || mw.config.get( 'wgCurRevisionId' );
this.restoring = !!revisionId;
this.editToken = mw.user.tokens.get( 'editToken' );
this.apiUrl = mw.util.wikiScript( 'api' );
this.submitUrl = ( new mw.Uri( mw.util.wikiGetlink( this.pageName ) ) )
.extend( { 'action': 'submit' } );
this.modules = [
'ext.visualEditor.core',
'ext.visualEditor.data'
]
.concat(
document.createElementNS && document.createElementNS( 'http://www.w3.org/2000/svg', 'svg' ).createSVGRect ?
['ext.visualEditor.viewPageTarget.icons-vector', 'ext.visualEditor.icons-vector'] :
['ext.visualEditor.viewPageTarget.icons-raster', 'ext.visualEditor.icons-raster']
)
.concat( conf.pluginModules || [] );
for ( i = 0, len = extraModules.length; i < len; i++ ) {
prefName = 'visualeditor-enable-' + extraModules[i];
prefValue = mw.config.get( 'wgUserName' ) === null ?
conf.defaultUserOptions[prefName] :
mw.user.options.get( prefName, conf.defaultUserOptions[prefName] );
if ( prefValue && prefValue !== '0' ) {
this.modules.push( 'ext.visualEditor.' + extraModules[i] );
}
}
this.pluginCallbacks = [];
this.modulesReady = $.Deferred();
this.loading = false;
this.saving = false;
this.serializing = false;
this.submitting = false;
this.baseTimeStamp = null;
this.startTimeStamp = null;
this.doc = null;
this.editNotices = null;
this.checkboxes = null;
this.remoteNotices = [];
this.localNoticeMessages = [];
this.isMobileDevice = (
'ontouchstart' in window ||
( window.DocumentTouch && document instanceof window.DocumentTouch )
);
};
/**
* @event load
* @param {HTMLDocument} dom
*/
/**
* @event editConflict
*/
/**
* @event save
* @param {string} html
*/
/**
* @event showChanges
* @param {string} diff
*/
/**
* @event noChanges
*/
/**
* @event loadError
* @param {jqXHR|null} jqXHR
* @param {string} status Text status message
* @param {Mixed|null} error HTTP status text
*/
/**
* @event saveError
* @param {jqXHR|null} jqXHR
* @param {string} status Text status message
* @param {Object|null} data API response data
*/
/**
* @event showChangesError
* @param {jqXHR|null} jqXHR
* @param {string} status Text status message
* @param {Mixed|null} error HTTP status text
*/
/**
* @event serializeError
* @param {jqXHR|null} jqXHR
* @param {string} status Text status message
* @param {Mixed|null} error HTTP status text
*/
/* Inheritance */
OO.inheritClass( ve.init.mw.Target, ve.init.Target );
/* Static Methods */
/**
* Handle the RL modules for VE and registered plugin modules being loaded.
*
* This method is called within the context of a target instance. It executes all registered
* plugin callbacks, gathers any promises returned and resolves this.modulesReady when all of
* the gathered promises are resolved.
*/
ve.init.mw.Target.onModulesReady = function () {
var i, len, callbackResult, promises = [];
for ( i = 0, len = this.pluginCallbacks.length; i < len; i++ ) {
callbackResult = this.pluginCallbacks[i]( this );
if ( callbackResult && callbackResult.then ) { // duck-type jQuery.Promise using .then
promises.push( callbackResult );
}
}
// Dereference the callbacks
this.pluginCallbacks = [];
// Create a master promise tracking all the promises we got, and wait for it
// to be resolved
$.when.apply( $, promises ).done( this.modulesReady.resolve ).fail( this.modulesReady.reject );
};
/**
* Handle response to a successful load request.
*
* This method is called within the context of a target instance. If successful the DOM from the
* server will be parsed, stored in {this.doc} and then {ve.init.mw.Target.onReady} will be called once
* the modules are ready.
*
* @static
* @method
* @param {Object} response XHR Response object
* @param {string} status Text status message
* @fires loadError
*/
ve.init.mw.Target.onLoad = function ( response ) {
var data = response ? response.visualeditor : null;
if ( !data && !response.error ) {
ve.init.mw.Target.onLoadError.call(
this, null, 'Invalid response in response from server', null
);
} else if ( response.error || data.result === 'error' ) {
ve.init.mw.Target.onLoadError.call( this, null,
response.error.code + ': ' + response.error.info,
null
);
} else if ( typeof data.content !== 'string' ) {
ve.init.mw.Target.onLoadError.call(
this, null, 'No HTML content in response from server', null
);
} else {
this.originalHtml = data.content;
this.doc = ve.createDocumentFromHtml( this.originalHtml );
this.remoteNotices = ve.getObjectValues( data.notices );
this.checkboxes = data.checkboxes;
this.baseTimeStamp = data.basetimestamp;
this.startTimeStamp = data.starttimestamp;
this.revid = data.oldid;
// Everything worked, the page was loaded, continue as soon as the modules are loaded
this.modulesReady.done( ve.bind( ve.init.mw.Target.onReady, this ) );
}
};
/**
* Handle the edit notices being ready for rendering.
*
* @static
* @method
*/
ve.init.mw.Target.onNoticesReady = function () {
var i, len, noticeHtmls, tmp, el;
// Since we're going to parse them, we might as well save these nodes
// so we don't have to parse them again later.
this.editNotices = {};
/* Don't show notices without visible html (bug 43013). */
// This is a temporary container for parsed notices in the <body>.
// We need the elements to be in the DOM in order for stylesheets to apply
// and jquery.visibleText to determine whether a node is visible.
tmp = document.createElement( 'div' );
// The following is essentially display none, but we can't use that
// since then all descendants will be considered invisible too.
tmp.style.cssText = 'position: static; top: 0; width: 0; height: 0; border: 0; visibility: hidden;';
document.body.appendChild( tmp );
// Merge locally and remotely generated notices
noticeHtmls = this.remoteNotices.slice();
for ( i = 0, len = this.localNoticeMessages.length; i < len; i++ ) {
noticeHtmls.push(
'<p>' + ve.init.platform.getParsedMessage( this.localNoticeMessages[i] ) + '</p>'
);
}
for ( i = 0, len = noticeHtmls.length; i < len; i++ ) {
el = $( '<div>' )
.addClass( 've-init-mw-viewPageTarget-editNotices-notice' )
.html( noticeHtmls[i] )
.get( 0 );
tmp.appendChild( el );
if ( $.getVisibleText( el ).trim() !== '' ) {
this.editNotices[i] = el;
}
tmp.removeChild( el );
}
document.body.removeChild( tmp );
};
/**
* Handle both DOM and modules being loaded and ready.
*
* This method is called within the context of a target instance.
*
* @static
* @method
* @fires load
*/
ve.init.mw.Target.onReady = function () {
// We need to wait until onReady as local notices may require special messages
ve.init.mw.Target.onNoticesReady.call( this );
this.loading = false;
this.emit( 'load', this.doc );
};
/**
* Handle an unsuccessful load request.
*
* This method is called within the context of a target instance.
*
* @static
* @method
* @param {Object} jqXHR
* @param {string} status Text status message
* @param {Mixed} error HTTP status text
* @fires loadError
*/
ve.init.mw.Target.onLoadError = function ( jqXHR, status, error ) {
this.loading = false;
this.emit( 'loadError', jqXHR, status, error );
};
/**
* Handle a successful save request.
*
* This method is called within the context of a target instance.
*
* @static
* @method
* @param {Object} response Response data
* @param {string} status Text status message
* @fires editConflict
* @fires save
*/
ve.init.mw.Target.onSave = function ( response ) {
this.saving = false;
var data = response.visualeditoredit;
if ( !data && !response.error ) {
ve.init.mw.Target.onSaveError.call( this, null, 'Invalid response from server', response );
} else if ( response.error ) {
if ( response.error.code === 'editconflict' ) {
this.emit( 'editConflict' );
} else {
ve.init.mw.Target.onSaveError.call( this, null, 'Save failure', response );
}
} else if ( data.result !== 'success' ) {
// Note, this could be any of db failure, hookabort, badtoken or even a captcha
ve.init.mw.Target.onSaveError.call( this, null, 'Save failure', response );
} else if ( typeof data.content !== 'string' ) {
ve.init.mw.Target.onSaveError.call(
this,
null,
'Invalid HTML content in response from server',
response
);
} else {
this.emit( 'save', data.content, data.newrevid );
}
};
/**
* Handle an unsuccessful save request.
*
* @static
* @method
* @this ve.init.mw.Target
* @param {Object} jqXHR
* @param {string} status Text status message
* @param {Object|null} data API response data
* @fires saveError
*/
ve.init.mw.Target.onSaveError = function ( jqXHR, status, data ) {
this.saving = false;
this.emit( 'saveError', jqXHR, status, data );
};
/**
* Handle a successful show changes request.
*
* @static
* @method
* @param {Object} response API response data
* @param {string} status Text status message
* @fires showChanges
* @fires noChanges
*/
ve.init.mw.Target.onShowChanges = function ( response ) {
var data = response.visualeditor;
if ( !data && !response.error ) {
ve.init.mw.Target.onShowChangesError.call( this, null, 'Invalid response from server', null );
} else if ( response.error ) {
ve.init.mw.Target.onShowChangesError.call(
this, null, 'Unsuccessful request: ' + response.error.info, null
);
} else if ( data.result === 'nochanges' ) {
this.emit( 'noChanges' );
} else if ( data.result !== 'success' ) {
ve.init.mw.Target.onShowChangesError.call( this, null, 'Failed request: ' + data.result, null );
} else if ( typeof data.diff !== 'string' ) {
ve.init.mw.Target.onShowChangesError.call(
this, null, 'Invalid HTML content in response from server', null
);
} else {
this.emit( 'showChanges', data.diff );
}
};
/**
* Handle errors during saveChanges action.
*
* @static
* @method
* @this ve.init.mw.Target
* @param {Object} jqXHR
* @param {string} status Text status message
* @param {Mixed} error HTTP status text
* @fires showChangesError
*/
ve.init.mw.Target.onShowChangesError = function ( jqXHR, status, error ) {
this.saving = false;
this.emit( 'showChangesError', jqXHR, status, error );
};
/**
* Handle a successful serialize request.
*
* This method is called within the context of a target instance.
*
* @static
* @method
* @param {Object} data API response data
* @param {string} status Text status message
*/
ve.init.mw.Target.onSerialize = function ( response ) {
this.serializing = false;
var data = response.visualeditor;
if ( !data && !response.error ) {
ve.init.mw.Target.onSerializeError.call( this, null, 'Invalid response from server', null );
} else if ( response.error ) {
ve.init.mw.Target.onSerializeError.call(
this, null, 'Unsuccessful request: ' + response.error.info, null
);
} else if ( data.result === 'error' ) {
ve.init.mw.Target.onSerializeError.call( this, null, 'Server error', null );
} else if ( typeof data.content !== 'string' ) {
ve.init.mw.Target.onSerializeError.call(
this, null, 'No Wikitext content in response from server', null
);
} else {
if ( typeof this.serializeCallback === 'function' ) {
this.serializeCallback( data.content );
delete this.serializeCallback;
}
}
};
/**
* Handle an unsuccessful serialize request.
*
* This method is called within the context of a target instance.
*
* @static
* @method
* @param {jqXHR|null} jqXHR
* @param {string} status Text status message
* @param {Mixed|null} error HTTP status text
* @fires serializeError
*/
ve.init.mw.Target.onSerializeError = function ( jqXHR, status, error ) {
this.serializing = false;
this.emit( 'serializeError', jqXHR, status, error );
};
/* Methods */
/**
* Add a plugin module or callback.
*
* @param {string|Function} plugin Plugin module or callback
*/
ve.init.mw.Target.prototype.addPlugin = function ( plugin ) {
if ( typeof plugin === 'string' ) {
this.modules.push( plugin );
} else if ( $.isFunction( plugin ) ) {
this.pluginCallbacks.push( plugin );
}
};
/**
* Add an array of plugins.
*
* @see #addPlugin
* @param {Array} plugins
*/
ve.init.mw.Target.prototype.addPlugins = function ( plugins ) {
var i, len;
for ( i = 0, len = plugins.length; i < len; i++ ) {
this.addPlugin( plugins[i] );
}
};
/**
* Get HTML to send to Parsoid. This takes a document generated by the converter and
* transplants the head tag from the old document into it, as well as the attributes on the
* html and body tags.
*
* @param {HTMLDocument} newDoc Document generated by ve.dm.Converter. Will be modified.
* @returns {string} Full HTML document
*/
ve.init.mw.Target.prototype.getHtml = function ( newDoc ) {
var i, len, oldDoc = this.doc;
function copyAttributes( from, to ) {
var i, len;
for ( i = 0, len = from.attributes.length; i < len; i++ ) {
to.setAttribute( from.attributes[i].name, from.attributes[i].value );
}
}
// Copy the head from the old document
for ( i = 0, len = oldDoc.head.childNodes.length; i < len; i++ ) {
newDoc.head.appendChild( oldDoc.head.childNodes[i].cloneNode( true ) );
}
// Copy attributes from the old document for the html, head and body
copyAttributes( oldDoc.documentElement, newDoc.documentElement );
copyAttributes( oldDoc.head, newDoc.head );
copyAttributes( oldDoc.body, newDoc.body );
return '<!doctype html>' + ve.properOuterHtml( newDoc.documentElement );
};
/**
* Get DOM data from the Parsoid API.
*
* This method performs an asynchronous action and uses a callback function to handle the result.
*
* A side-effect of calling this method is that it requests {this.modules} be loaded.
*
* @method
* @returns {boolean} Loading has been started
*/
ve.init.mw.Target.prototype.load = function () {
var data, start;
// Prevent duplicate requests
if ( this.loading ) {
return false;
}
// Start loading the module immediately
mw.loader.using(
// Wait for site and user JS before running plugins
this.modules.concat( [ 'site', 'user' ] ),
ve.bind( ve.init.mw.Target.onModulesReady, this )
);
data = {
'action': 'visualeditor',
'paction': 'parse',
'page': this.pageName,
'format': 'json'
};
// Only request the API to explicitly load the currently visible revision if we're restoring
// from oldid. Otherwise we should load the latest version. This prevents us from editing an
// old version if an edit was made while the user was viewing the page and/or the user is
// seeing (slightly) stale cache.
if ( this.restoring ) {
data.oldid = this.revid;
}
// Load DOM
start = ve.now();
this.loading = $.ajax( {
'url': this.apiUrl,
'data': data,
'dataType': 'json',
'type': 'POST',
// Wait up to 100 seconds before giving up
'timeout': 100000,
'cache': 'false'
} )
.then( function ( data, status, jqxhr ) {
ve.track( 'performance.domLoad', {
'bytes': $.byteLength( jqxhr.responseText ),
'duration': ve.now() - start,
'cacheHit': /hit/i.test( jqxhr.getResponseHeader( 'X-Cache' ) ),
'parsoid': jqxhr.getResponseHeader( 'X-Parsoid-Performance' )
} );
return jqxhr;
} )
.done( ve.bind( ve.init.mw.Target.onLoad, this ) )
.fail( ve.bind( ve.init.mw.Target.onLoadError, this ) );
return true;
};
/**
* Post DOM data to the Parsoid API.
*
* This method performs an asynchronous action and uses a callback function to handle the result.
*
* target.save( dom, { 'summary': 'test', 'minor': true, 'watch': false } );
*
* @method
* @param {HTMLDocument} doc Document to save
* @param {Object} options Saving options. All keys are passed through, including unrecognized ones.
* - {string} summary Edit summary
* - {boolean} minor Edit is a minor edit
* - {boolean} watch Watch the page
* @returns {boolean} Saving has been started
*/
ve.init.mw.Target.prototype.save = function ( doc, options ) {
var data, start;
// Prevent duplicate requests
if ( this.saving ) {
return false;
}
data = $.extend( {}, options, {
'format': 'json',
'action': 'visualeditoredit',
'page': this.pageName,
'oldid': this.revid,
'basetimestamp': this.baseTimeStamp,
'starttimestamp': this.startTimeStamp,
'html': this.getHtml( doc ),
'token': this.editToken
} );
// Save DOM
start = ve.now();
this.saving = $.ajax( {
'url': this.apiUrl,
'data': data,
'dataType': 'json',
'type': 'POST',
// Wait up to 100 seconds before giving up
'timeout': 100000
} )
.then( function ( data, status, jqxhr ) {
ve.track( 'performance.domSave', {
'bytes': $.byteLength( jqxhr.responseText ),
'duration': ve.now() - start,
'parsoid': jqxhr.getResponseHeader( 'X-Parsoid-Performance' )
} );
return jqxhr;
} )
.done( ve.bind( ve.init.mw.Target.onSave, this ) )
.fail( ve.bind( ve.init.mw.Target.onSaveError, this ) );
return true;
};
/**
* Post DOM data to the Parsoid API to retreive wikitext diff.
*
* @method
* @param {HTMLDocument} doc Document to compare against (via wikitext)
*/
ve.init.mw.Target.prototype.showChanges = function ( doc ) {
$.ajax( {
'url': this.apiUrl,
'data': {
'format': 'json',
'action': 'visualeditor',
'paction': 'diff',
'page': this.pageName,
'oldid': this.revid,
'html': this.getHtml( doc )
},
'dataType': 'json',
'type': 'POST',
// Wait up to 100 seconds before giving up
'timeout': 100000
} )
.done( ve.bind( ve.init.mw.Target.onShowChanges, this ) )
.fail( ve.bind( ve.init.mw.Target.onShowChangesError, this ) );
};
/**
* Post DOM data to the Parsoid API.
*
* This method performs a synchronous action and will take the user to a new page when complete.
*
* target.submit( wikitext, { 'summary': 'test', 'minor': true, 'watch': false } );
*
* @method
* @param {string} wikitext Wikitext to submit
* @param {Object} options Saving options
* - {string} summary Edit summary
* - {boolean} minor Edit is a minor edit
* - {boolean} watch Watch the page
* @returns {boolean} Submitting has been started
*/
ve.init.mw.Target.prototype.submit = function ( wikitext, options ) {
// Prevent duplicate requests
if ( this.submitting ) {
return false;
}
// Save DOM
this.submitting = true;
var key,
$form = $( '<form method="post" enctype="multipart/form-data"></form>' ),
params = {
'format': 'text/x-wiki',
'oldid': this.revid,
'wpStarttime': this.baseTimeStamp,
'wpEdittime': this.startTimeStamp,
'wpTextbox1': wikitext,
'wpSummary': options.summary,
'wpWatchthis': Number( options.watch ),
'wpMinoredit': Number( options.minor ),
'wpEditToken': this.editToken,
'wpSave': 1
};
// Add params as hidden fields
for ( key in params ) {
$form.append( $( '<input type="hidden">' ).attr( { 'name': key, 'value': params[key] } ) );
}
// Submit the form, mimicking a traditional edit
$form.attr( 'action', this.submitUrl ).appendTo( 'body' ).submit();
return true;
};
/**
* Get Wikitext data from the Parsoid API.
*
* This method performs an asynchronous action and uses a callback function to handle the result.
*
* target.serialize(
* dom,
* function ( wikitext ) {
* // Do something with the loaded DOM
* }
* );
*
* @method
* @param {HTMLDocument} doc Document to serialize
* @param {Function} callback Function to call when complete, accepts error and wikitext arguments
* @returns {boolean} Serializing has beeen started
*/
ve.init.mw.Target.prototype.serialize = function ( doc, callback ) {
// Prevent duplicate requests
if ( this.serializing ) {
return false;
}
// Load DOM
this.serializing = true;
this.serializeCallback = callback;
$.ajax( {
'url': this.apiUrl,
'data': {
'action': 'visualeditor',
'paction': 'serialize',
'html': this.getHtml( doc ),
'page': this.pageName,
'oldid': this.revid,
'format': 'json'
},
'dataType': 'json',
'type': 'POST',
// Wait up to 100 seconds before giving up
'timeout': 100000,
'cache': 'false'
} )
.done( ve.bind( ve.init.mw.Target.onSerialize, this ) )
.fail( ve.bind( ve.init.mw.Target.onSerializeError, this ) );
return true;
};