Current File : /www/varak.net/wiki.varak.net/extensions/MultimediaViewer/resources/mmv.bootstrap/mmv.bootstrap.js
/*
* This file is part of the MediaWiki extension MultimediaViewer.
*
* MultimediaViewer is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* MultimediaViewer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MultimediaViewer. If not, see <http://www.gnu.org/licenses/>.
*/
( function ( mw, $ ) {
var MMVB;
/**
* Bootstrap code listening to thumb clicks checking the initial location.hash
* Loads the mmv and opens it if necessary
*
* @class mw.mmv.MultimediaViewerBootstrap
*/
function MultimediaViewerBootstrap() {
// Exposed for tests
this.hoverWaitDuration = 200;
// TODO lazy-load config and htmlUtils
/** @property {mw.mmv.Config} config - */
this.config = new mw.mmv.Config(
mw.config.get( 'wgMultimediaViewer', {} ),
mw.config,
mw.user,
new mw.Api(),
mw.storage
);
this.validExtensions = this.config.extensions();
/** @property {mw.mmv.HtmlUtils} htmlUtils - */
this.htmlUtils = new mw.mmv.HtmlUtils();
/**
* This flag is set to true when we were unable to load the viewer.
* @property {boolean}
*/
this.viewerIsBroken = false;
this.thumbsReadyDeferred = $.Deferred();
this.thumbs = [];
this.$thumbs = null; // will be set by processThumbs
// find and setup all thumbs on this page
// this will run initially and then every time the content changes,
// e.g. via a VE edit or pagination in a multipage file
mw.hook( 'wikipage.content' ).add( $.proxy( this, 'processThumbs' ) );
this.browserHistory = window.history;
}
MMVB = MultimediaViewerBootstrap.prototype;
/**
* Loads the mmv module asynchronously and passes the thumb data to it
*
* @param {boolean} [setupOverlay]
* @return {jQuery.Promise}
*/
MMVB.loadViewer = function ( setupOverlay ) {
var deferred = $.Deferred(),
bs = this,
viewer,
message;
// Don't load if someone has specifically stopped us from doing so
if ( mw.config.get( 'wgMediaViewer' ) !== true ) {
return deferred.reject();
}
// FIXME setupOverlay is a quick hack to avoid setting up and immediately
// removing the overlay on a not-MMV -> not-MMV hash change.
// loadViewer is called on every click and hash change and setting up
// the overlay is not needed on all of those; this logic really should
// not be here.
if ( setupOverlay ) {
bs.setupOverlay();
}
mw.loader.using( 'mmv', function () {
try {
viewer = bs.getViewer();
} catch ( e ) {
message = e.message;
if ( e.stack ) {
message += '\n' + e.stack;
}
deferred.reject( message );
return;
}
deferred.resolve( viewer );
}, function ( error ) {
deferred.reject( error.message );
} );
return deferred.promise()
.then(
function ( viewer ) {
if ( !bs.viewerInitialized ) {
if ( bs.thumbs.length ) {
viewer.initWithThumbs( bs.thumbs );
}
bs.viewerInitialized = true;
}
return viewer;
},
function ( message ) {
mw.log.warn( message );
bs.cleanupOverlay();
bs.viewerIsBroken = true;
mw.notify( 'Error loading MediaViewer: ' + message );
return $.Deferred().reject( message );
}
);
};
/**
* Processes all thumbs found on the page
*
* @param {jQuery} $content Element to search for thumbs
*/
MMVB.processThumbs = function ( $content ) {
var bs = this;
this.$thumbs = $content.find(
'.gallery .image img, ' +
'a.image img, ' +
'#file a img, ' +
'figure[typeof*="mw:Image"] > *:first-child > img, ' +
'span[typeof*="mw:Image"] img'
);
try {
this.$thumbs.each( function ( i, thumb ) {
bs.processThumb( thumb );
} );
} finally {
this.thumbsReadyDeferred.resolve();
// now that we have set up our real click handler we can we can remove the temporary
// handler added in mmv.head.js which just replays clicks to the real handler
$( document ).off( 'click.mmv-head' );
}
};
/**
* Check if this thumbnail should be handled by MediaViewer
*
* @param {jQuery} $thumb the thumbnail (an `<img>` element) in question
* @return {boolean}
*/
MMVB.isAllowedThumb = function ( $thumb ) {
var selectors = [
'.metadata', // this is inside an informational template like {{refimprove}} on enwiki.
'.noviewer', // MediaViewer has been specifically disabled for this image
'.noarticletext', // we are on an error page for a non-existing article, the image is part of some template
'#siteNotice',
'ul.mw-gallery-slideshow li.gallerybox' // thumbnails of a slideshow gallery
];
return $thumb.closest( selectors.join( ', ' ) ).length === 0;
};
/**
* Processes a thumb
*
* @param {Object} thumb
*/
MMVB.processThumb = function ( thumb ) {
var title,
bs = this,
$thumb = $( thumb ),
$link = $thumb.closest( 'a.image, [typeof*="mw:Image"] > a' ),
$thumbContain = $link.closest( '.thumb, [typeof*="mw:Image"]' ),
$enlarge = $thumbContain.find( '.magnify a' ),
link = $link.prop( 'href' ),
alt = $thumb.attr( 'alt' ),
isFilePageMainThumb = $thumb.closest( '#file' ).length > 0;
if ( isFilePageMainThumb ) {
// main thumbnail (file preview area) of a file page
// if this is a PDF filetype thumbnail, it can trick us,
// so we short-circuit that logic and use the file page title
// instead of the thumbnail logic.
title = mw.Title.newFromText( mw.config.get( 'wgTitle' ), mw.config.get( 'wgNamespaceNumber' ) );
} else {
title = mw.Title.newFromImg( $thumb );
}
if ( !title || !title.getExtension() || !( title.getExtension().toLowerCase() in bs.validExtensions ) ) {
// Short-circuit event handler and interface setup, because
// we can't do anything for this filetype
return;
}
if ( !bs.isAllowedThumb( $thumb ) ) {
return;
}
if ( $thumbContain.length ) {
// If this is a thumb, we preload JS/CSS when the mouse cursor hovers the thumb container (thumb image + caption + border)
$thumbContain.on( {
mouseenter: function () {
// There is no point preloading if clicking the thumb won't open Media Viewer
if ( !bs.config.isMediaViewerEnabledOnClick() ) {
return;
}
bs.preloadOnHoverTimer = setTimeout( function () {
mw.loader.load( 'mmv' );
}, bs.hoverWaitDuration );
},
mouseleave: function () {
if ( bs.preloadOnHoverTimer ) {
clearTimeout( bs.preloadOnHoverTimer );
}
}
} );
}
if ( isFilePageMainThumb ) {
this.processFilePageThumb( $thumb, title );
return;
}
// This is the data that will be passed onto the mmv
this.thumbs.push( {
thumb: thumb,
$thumb: $thumb,
title: title,
link: link,
alt: alt,
caption: this.findCaption( $thumbContain, $link ) } );
$link.add( $enlarge ).on( 'click', function ( e ) {
return bs.click( this, e, title );
} );
};
/**
* Processes the main thumbnail of a file page by adding some buttons
* below to open MediaViewer.
*
* @param {jQuery} $thumb
* @param {mw.Title} title
*/
MMVB.processFilePageThumb = function ( $thumb, title ) {
var $link,
$configLink,
$filepageButtons,
bs = this,
link = $thumb.closest( 'a' ).prop( 'href' );
// remove the buttons (and the clearing element) if they are already there
// this should not happen (at least until we support paged media) but just in case
$( '.mw-mmv-filepage-buttons' ).next().addBack().remove();
$link = $( '<a>' )
// It won't matter because we catch the click event anyway, but
// give the user some URL to see.
.prop( 'href', link )
.addClass( 'mw-mmv-view-expanded mw-ui-button mw-ui-icon mw-ui-icon-before' )
.text( mw.message( 'multimediaviewer-view-expanded' ).text() );
$configLink = $( '<a>' )
.prop( 'href', $thumb.closest( 'a' ).prop( 'href' ) )
.addClass( 'mw-mmv-view-config mw-ui-button mw-ui-icon mw-ui-icon-element' )
.text( mw.message( 'multimediaviewer-view-config' ).text() );
$filepageButtons = $( '<div>' )
.addClass( 'mw-ui-button-group mw-mmv-filepage-buttons' )
.append( $link, $configLink );
$( '.fullMedia' ).append(
$filepageButtons,
$( '<div>' )
.css( 'clear', 'both' )
);
this.thumbs.push( {
thumb: $thumb.get( 0 ),
$thumb: $thumb,
title: title,
link: link
} );
$link.on( 'click', function () {
if ( bs.statusInfoDialog ) {
bs.statusInfoDialog.close();
}
bs.openImage( this, title );
return false;
} );
$configLink.on( 'click', function () {
if ( bs.statusInfoDialog ) {
bs.statusInfoDialog.close();
}
bs.openImage( this, title ).then( function () {
$( document ).trigger( 'mmv-options-open' );
} );
return false;
} );
if ( this.config.shouldShowStatusInfo() ) {
this.config.disableStatusInfo();
this.showStatusInfo();
}
};
/**
* Shows a popup notifying the user
*/
MMVB.showStatusInfo = function () {
var bs = this;
mw.loader.using( 'mmv.ui.tipsyDialog' ).done( function () {
/** @property {mw.mmv.ui.TipsyDialog} statusInfoDialog popup on the file page explaining how to re-enable */
bs.statusInfoDialog = new mw.mmv.ui.TipsyDialog( $( '.mw-mmv-view-expanded' ), { gravity: 'sw' } );
bs.statusInfoDialog.setContent(
mw.message( 'multimediaviewer-disable-info-title' ).plain(),
mw.message( 'multimediaviewer-disable-info' ).escaped()
);
// tipsy mispositions the tooltip, probably because it does the positioning before the buttons are
// displayed and the page is reflown. Adding some delay seems to help.
window.setTimeout( function () {
bs.statusInfoDialog.open();
}, 1000 );
} );
};
/**
* Finds the caption for an image.
*
* @param {jQuery} $thumbContain The container for the thumbnail.
* @param {jQuery} $link The link that encompasses the thumbnail.
* @return {string|undefined} Unsafe HTML may be present - caution
*/
MMVB.findCaption = function ( $thumbContain, $link ) {
var $thumbCaption, $potentialCaptions;
if ( !$thumbContain.length ) {
return $link.prop( 'title' ) || undefined;
}
$potentialCaptions = $thumbContain.find( '.thumbcaption, figcaption' );
if ( $potentialCaptions.length < 2 ) {
$thumbCaption = $potentialCaptions.eq( 0 );
} else {
// Template:Multiple_image or some such; try to find closest caption to the image
$thumbCaption = $link.closest( ':has(> .thumbcaption)', $thumbContain )
.find( '> .thumbcaption' );
}
if ( !$thumbCaption.length ) { // gallery, maybe
$thumbCaption = $thumbContain
.closest( '.gallerybox' )
.not( function () {
// do not treat categories as galleries - the autogenerated caption they have is not helpful
return $thumbContain.closest( '#mw-category-media' ).length;
} )
.not( function () {
// do not treat special file related pages as galleries
var $specialFileRelatedPages = $(
'.page-Special_NewFiles, ' +
'.page-Special_MostLinkedFiles,' +
'.page-Special_MostGloballyLinkedFiles, ' +
'.page-Special_UncategorizedFiles, ' +
'.page-Special_UnusedFiles'
);
return $thumbContain.closest( $specialFileRelatedPages ).length;
} )
.find( '.gallerytext' );
}
if ( $thumbCaption.find( '.magnify' ).length ) {
$thumbCaption = $thumbCaption.clone();
$thumbCaption.find( '.magnify' ).remove();
}
return this.htmlUtils.htmlToTextWithTags( $thumbCaption.html() || '' );
};
/**
* Opens MediaViewer and loads the given thumbnail. Requires processThumb() to be called first.
*
* @param {HTMLElement} element Clicked element
* @param {mw.Title} title File title
* @return {jQuery.Promise}
*/
MMVB.openImage = function ( element, title ) {
var $element = $( element );
mw.mmv.durationLogger.start( [ 'click-to-first-image', 'click-to-first-metadata' ] );
if ( $element.is( 'a.image, [typeof*="mw:Image"] > a' ) ) {
mw.mmv.actionLogger.log( 'thumbnail' );
} else if ( $element.is( '.magnify a' ) ) {
mw.mmv.actionLogger.log( 'enlarge' );
}
this.ensureEventHandlersAreSetUp();
return this.loadViewer( true ).then( function ( viewer ) {
viewer.loadImageByTitle( title, true );
} );
};
/**
* Handles a click event on a link
*
* @param {HTMLElement} element Clicked element
* @param {jQuery.Event} e jQuery event object
* @param {mw.Title} title File title
* @return {boolean} a value suitable for an event handler (ie. true if the click should be handled
* by the browser).
*/
MMVB.click = function ( element, e, title ) {
// Do not interfere with non-left clicks or if modifier keys are pressed.
if ( ( e.button !== 0 && e.which !== 1 ) || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) {
return true;
}
// Don't load if someone has specifically stopped us from doing so
if ( !this.config.isMediaViewerEnabledOnClick() ) {
return true;
}
// Don't load if we already tried loading and it failed
if ( this.viewerIsBroken ) {
return true;
}
this.openImage( element, title );
// calling this late so that in case of errors users at least get to the file page
e.preventDefault();
return false;
};
/**
* Returns true if the hash part of the current URL is one that's owned by MMV.
*
* @return {boolean}
* @private
*/
MMVB.isViewerHash = function () {
return window.location.hash.indexOf( '#mediaviewer/' ) === 0 ||
window.location.hash.indexOf( '#/media/' ) === 0;
};
/**
* Handles the browser location hash on pageload or hash change
*
* @param {boolean} initialHash Whether this is called for the hash that came with the pageload
*/
MMVB.hash = function ( initialHash ) {
var bootstrap = this;
// There is no point loading the mmv if it isn't loaded yet for hash changes unrelated to the mmv
// Such as anchor links on the page
if ( !this.viewerInitialized && !this.isViewerHash() ) {
return;
}
if ( this.skipNextHashHandling ) {
this.skipNextHashHandling = false;
return;
}
this.loadViewer( this.isViewerHash() ).then( function ( viewer ) {
viewer.hash();
// this is an ugly temporary fix to avoid a black screen of death when
// the page is loaded with an invalid MMV url
if ( !viewer.isOpen ) {
bootstrap.cleanupOverlay();
} else if ( initialHash ) {
mw.mmv.actionLogger.log( 'hash-load' );
} else {
mw.mmv.actionLogger.log( 'history-navigation' );
}
} );
};
/**
* Handles hash change requests coming from mmv
*
* @param {jQuery.Event} e Custom mmv-hash event
*/
MMVB.internalHashChange = function ( e ) {
var hash = e.hash,
title = e.title;
// The advantage of using pushState when it's available is that it has to ability to truly
// clear the hash, not leaving "#" in the history
// An entry with "#" in the history has the side-effect of resetting the scroll position when navigating the history
if ( this.browserHistory && this.browserHistory.pushState ) {
// In order to truly clear the hash, we need to reconstruct the hash-free URL
if ( hash === '#' ) {
hash = window.location.href.replace( /#.*$/, '' );
}
window.history.pushState( null, title, hash );
} else {
// Since we voluntarily changed the hash, we don't want MMVB.hash (which will trigger on hashchange event) to treat it
this.skipNextHashHandling = true;
window.location.hash = hash;
}
document.title = title;
};
/**
* Instantiates a new viewer if necessary
*
* @return {mw.mmv.MultimediaViewer}
*/
MMVB.getViewer = function () {
if ( this.viewer === undefined ) {
this.viewer = new mw.mmv.MultimediaViewer( this.config );
this.viewer.setupEventHandlers();
mw.mmv.viewer = this.viewer;
}
return this.viewer;
};
/**
* Listens to events on the window/document
*/
MMVB.setupEventHandlers = function () {
var self = this;
/** @property {boolean} eventHandlersHaveBeenSetUp tracks domready event handler state */
this.eventHandlersHaveBeenSetUp = true;
$( window ).on( this.browserHistory && this.browserHistory.pushState ? 'popstate.mmvb' : 'hashchange', function () {
self.hash();
} );
// Interpret any hash that might already be in the url
self.hash( true );
$( document ).on( 'mmv-hash', function ( e ) {
self.internalHashChange( e );
} ).on( 'mmv-cleanup-overlay', function () {
self.cleanupOverlay();
} );
};
/**
* Cleans up event handlers, used for tests
*/
MMVB.cleanupEventHandlers = function () {
$( window ).off( 'hashchange popstate.mmvb' );
$( document ).off( 'mmv-hash' );
this.eventHandlersHaveBeenSetUp = false;
};
/**
* Makes sure event handlers are set up properly via MultimediaViewerBootstrap.setupEventHandlers().
* Called before loading the main mmv module. At this point, event handers for MultimediaViewerBootstrap
* should have been set up, but due to bug 70756 it cannot be guaranteed.
*/
MMVB.ensureEventHandlersAreSetUp = function () {
if ( !this.eventHandlersHaveBeenSetUp ) {
this.setupEventHandlers();
}
};
/**
* Sets up the overlay while the viewer loads
*/
MMVB.setupOverlay = function () {
var $body = $( document.body );
// There are situations where we can call setupOverlay while the overlay is already there,
// such as inside this.hash(). In that case, do nothing
if ( $body.hasClass( 'mw-mmv-lightbox-open' ) ) {
return;
}
if ( !this.$overlay ) {
this.$overlay = $( '<div>' )
.addClass( 'mw-mmv-overlay' );
}
this.savedScrollTop = $( window ).scrollTop();
$body.addClass( 'mw-mmv-lightbox-open' )
.append( this.$overlay );
};
/**
* Cleans up the overlay
*/
MMVB.cleanupOverlay = function () {
var bootstrap = this;
$( document.body ).removeClass( 'mw-mmv-lightbox-open' );
if ( this.$overlay ) {
this.$overlay.remove();
}
if ( this.savedScrollTop !== undefined ) {
// setTimeout because otherwise Chrome will scroll back to top after the popstate event handlers run
setTimeout( function () {
$( window ).scrollTop( bootstrap.savedScrollTop );
bootstrap.savedScrollTop = undefined;
} );
}
};
MMVB.whenThumbsReady = function () {
return this.thumbsReadyDeferred.promise();
};
mw.mmv.MultimediaViewerBootstrap = MultimediaViewerBootstrap;
}( mediaWiki, jQuery ) );
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