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/**
* ownCloud
*
* @author Vincent Petry
* @copyright 2014 Vincent Petry <pvince81@owncloud.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* global OC */
/* global SVGSupport, replaceSVG */
(function() {
/**
* Creates an breadcrumb element in the given container
*/
var BreadCrumb = function(options){
this.$el = $('<div class="breadcrumb"></div>');
options = options || {};
if (options.onClick) {
this.onClick = options.onClick;
}
if (options.onDrop) {
this.onDrop = options.onDrop;
}
if (options.getCrumbUrl) {
this.getCrumbUrl = options.getCrumbUrl;
}
};
BreadCrumb.prototype = {
$el: null,
dir: null,
lastWidth: 0,
hiddenBreadcrumbs: 0,
totalWidth: 0,
breadcrumbs: [],
onClick: null,
onDrop: null,
/**
* Sets the directory to be displayed as breadcrumb.
* This will re-render the breadcrumb.
* @param dir path to be displayed as breadcrumb
*/
setDirectory: function(dir) {
dir = dir || '/';
if (dir !== this.dir) {
this.dir = dir;
this.render();
}
},
/**
* Returns the full URL to the given directory
* @param part crumb data as map
* @param index crumb index
* @return full URL
*/
getCrumbUrl: function(part, index) {
return '#';
},
/**
* Renders the breadcrumb elements
*/
render: function() {
var parts = this._makeCrumbs(this.dir || '/');
var $crumb;
this.$el.empty();
this.breadcrumbs = [];
for (var i = 0; i < parts.length; i++) {
var part = parts[i];
var $image;
var $link = $('<a></a>').attr('href', this.getCrumbUrl(part, i));
$link.text(part.name);
$crumb = $('<div class="crumb"></div>');
$crumb.append($link);
$crumb.attr('data-dir', part.dir);
if (part.img) {
$image = $('<img class="svg"></img>');
$image.attr('src', part.img);
$link.append($image);
}
this.breadcrumbs.push($crumb);
this.$el.append($crumb);
if (this.onClick) {
$crumb.on('click', this.onClick);
}
}
$crumb.addClass('last');
// in case svg is not supported by the browser we need to execute the fallback mechanism
if (!SVGSupport()) {
replaceSVG();
}
// setup drag and drop
if (this.onDrop) {
this.$el.find('.crumb:not(.last)').droppable({
drop: this.onDrop,
tolerance: 'pointer'
});
}
this._updateTotalWidth();
this.resize($(window).width(), true);
},
/**
* Makes a breadcrumb structure based on the given path
* @param dir path to split into a breadcrumb structure
* @return array of map {dir: path, name: displayName}
*/
_makeCrumbs: function(dir) {
var crumbs = [];
var pathToHere = '';
// trim leading and trailing slashes
dir = dir.replace(/^\/+|\/+$/g, '');
var parts = dir.split('/');
if (dir === '') {
parts = [];
}
// root part
crumbs.push({
dir: '/',
name: '',
img: OC.imagePath('core', 'places/home.svg')
});
for (var i = 0; i < parts.length; i++) {
var part = parts[i];
pathToHere = pathToHere + '/' + part;
crumbs.push({
dir: pathToHere,
name: part
});
}
return crumbs;
},
_updateTotalWidth: function () {
var self = this;
this.lastWidth = 0;
// initialize with some extra space
this.totalWidth = 64;
// FIXME: this class should not know about global elements
if ( $('#navigation').length ) {
this.totalWidth += $('#navigation').get(0).offsetWidth;
}
this.hiddenBreadcrumbs = 0;
for (var i = 0; i < this.breadcrumbs.length; i++ ) {
this.totalWidth += $(this.breadcrumbs[i]).get(0).offsetWidth;
}
$.each($('#controls .actions>div'), function(index, action) {
self.totalWidth += $(action).get(0).offsetWidth;
});
},
/**
* Show/hide breadcrumbs to fit the given width
*/
resize: function (width, firstRun) {
var i, $crumb;
if (width === this.lastWidth) {
return;
}
// window was shrinked since last time or first run ?
if ((width < this.lastWidth || firstRun) && width < this.totalWidth) {
if (this.hiddenBreadcrumbs === 0 && this.breadcrumbs.length > 1) {
// start by hiding the first breadcrumb after home,
// that one will have extra three dots displayed
$crumb = this.breadcrumbs[1];
this.totalWidth -= $crumb.get(0).offsetWidth;
$crumb.find('a').addClass('hidden');
$crumb.append('<span class="ellipsis">...</span>');
this.totalWidth += $crumb.get(0).offsetWidth;
this.hiddenBreadcrumbs = 2;
}
i = this.hiddenBreadcrumbs;
// hide subsequent breadcrumbs if the space is still not enough
while (width < this.totalWidth && i > 1 && i < this.breadcrumbs.length - 1) {
$crumb = this.breadcrumbs[i];
this.totalWidth -= $crumb.get(0).offsetWidth;
$crumb.addClass('hidden');
this.hiddenBreadcrumbs = i;
i++;
}
// window is bigger than last time
} else if (width > this.lastWidth && this.hiddenBreadcrumbs > 0) {
i = this.hiddenBreadcrumbs;
while (width > this.totalWidth && i > 0) {
if (this.hiddenBreadcrumbs === 1) {
// special handling for last one as it has the three dots
$crumb = this.breadcrumbs[1];
if ($crumb) {
this.totalWidth -= $crumb.get(0).offsetWidth;
$crumb.find('.ellipsis').remove();
$crumb.find('a').removeClass('hidden');
this.totalWidth += $crumb.get(0).offsetWidth;
}
} else {
$crumb = this.breadcrumbs[i];
$crumb.removeClass('hidden');
this.totalWidth += $crumb.get(0).offsetWidth;
if (this.totalWidth > width) {
this.totalWidth -= $crumb.get(0).offsetWidth;
$crumb.addClass('hidden');
break;
}
}
i--;
this.hiddenBreadcrumbs = i;
}
}
this.lastWidth = width;
}
};
window.BreadCrumb = BreadCrumb;
})();
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