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/*
* 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, $, oo ) {
var RUP;
/**
* A helper class for reuse logic.
*
* @class mw.mmv.ui.Utils
* @constructor
*/
function Utils() {
/** @property {mw.mmv.HtmlUtils} htmlUtils - */
this.htmlUtils = new mw.mmv.HtmlUtils();
}
RUP = Utils.prototype;
/**
* Creates pulldown menu from given options.
*
* @param {string[]} options
* @param {string[]} classes
* @param {string} def
* @return {OO.ui.DropdownWidget}
*/
RUP.createPulldownMenu = function ( options, classes, def ) {
var dropdown, i, option,
items = [],
choices = {};
dropdown = new oo.ui.DropdownWidget( {
classes: classes
} );
for ( i = 0; i < options.length; i++ ) {
option = options[ i ];
choices[ option ] = new oo.ui.MenuOptionWidget( {
data: {
name: option,
height: null,
width: null
},
label: this.getDimensionsMessageHtml( option, 0, 0 ),
autoFitLabel: false
} );
items.push( choices[ option ] );
}
dropdown.getMenu()
.addItems( items )
.chooseItem( choices[ def ] );
return dropdown;
};
/**
* Gets a promise for the large thumbnail URL. This is needed because thumbnail URLs cannot
* be reliably guessed, even if we know the full size of the image - most of the time replacing
* the size in another thumbnail URL works (as long as the new size is not larger than the full
* size), but if the file name is very long and with the larger size the URL length would
* exceed a certain threshold, a different schema is used instead.
*
* @param {number} width
*
* @return {jQuery.Promise.<string>}
*/
RUP.getThumbnailUrlPromise = function ( width ) {
return $( document ).triggerHandler( 'mmv-request-thumbnail', width ) ||
$.Deferred().reject();
};
/**
* Updates the menu options based on calculated sizes.
*
* @private
* @param {Object} sizes
* @param {OO.ui.MenuOptionWidget[]} options
*/
RUP.updateMenuOptions = function ( sizes, options ) {
var i, option, data, $label;
for ( i = 0; i < options.length; i++ ) {
option = options[ i ];
data = option.getData();
if ( sizes[ data.name ] ) {
option.setDisabled( false );
// These values are later used when the item is selected
data.width = sizes[ data.name ].width;
data.height = sizes[ data.name ].height;
$label = $( '<span>' ).html( this.getDimensionsMessageHtml( data.name, data.width, data.height ) );
option.setLabel( $label );
} else {
option.setDisabled( true );
}
}
};
/**
* Calculates possible image sizes for html snippets. It returns up to
* three possible snippet frame sizes (small, medium, large) plus the
* original image size.
*
* @param {number} width
* @param {number} height
* @return {Object}
* @return {Object} return.small
* @return {Object} return.medium
* @return {Object} return.large
* @return {Object} return.original
*/
RUP.getPossibleImageSizesForHtml = function ( width, height ) {
var i, bucketName,
currentGuess, dimensions,
bucketWidth, bucketHeight,
buckets = {
small: { width: 220, height: 145 },
medium: { width: 640, height: 480 },
large: { width: 1200, height: 900 }
},
sizes = {},
bucketNames = Object.keys( buckets ),
widthToHeight = height / width,
heightToWidth = width / height;
for ( i = 0; i < bucketNames.length; i++ ) {
bucketName = bucketNames[ i ];
dimensions = buckets[ bucketName ];
bucketWidth = dimensions.width;
bucketHeight = dimensions.height;
if ( width > bucketWidth ) {
// Width fits in the current bucket
currentGuess = bucketWidth;
if ( currentGuess * widthToHeight > bucketHeight ) {
// Constrain in height, resize width accordingly
sizes[ bucketName ] = {
width: Math.round( bucketHeight * heightToWidth ),
height: bucketHeight
};
} else {
sizes[ bucketName ] = {
width: currentGuess,
height: Math.round( currentGuess * widthToHeight )
};
}
} else if ( height > bucketHeight ) {
// Height fits in the current bucket, resize width accordingly
sizes[ bucketName ] = {
width: Math.round( bucketHeight * heightToWidth ),
height: bucketHeight
};
}
}
sizes.original = { width: width, height: height };
return sizes;
};
/**
* Generates an i18n message for a label, given a size label and image dimensions
*
* @param {string} sizeLabel
* @param {number} width
* @param {number} height
* @return {string} i18n label html
*/
RUP.getDimensionsMessageHtml = function ( sizeLabel, width, height ) {
var dimensions = this.htmlUtils.jqueryToHtml( $( '<span>' )
.addClass( 'mw-mmv-embed-dimensions' )
.text(
mw.message(
'multimediaviewer-embed-dimensions-separated',
mw.message(
'multimediaviewer-embed-dimensions',
width, height ).text()
).text()
) );
return mw.message(
'multimediaviewer-' + sizeLabel + '-embed-dimensions',
dimensions
).text();
};
mw.mmv.ui.Utils = Utils;
}( mediaWiki, jQuery, OO ) );
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