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angular-deckgrid.js
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angular-deckgrid.js
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/*! angular-deckgrid (v0.4.1) - Copyright: 2013 - 2014, André König ([email protected]) - MIT */
/*
* angular-deckgrid
*
* Copyright(c) 2013-2014 André König <[email protected]>
* MIT Licensed
*
*/
/**
* @author André König ([email protected])
*
*/
angular.module('akoenig.deckgrid', []);
angular.module('akoenig.deckgrid').directive('deckgrid', [
'DeckgridDescriptor',
function initialize (DeckgridDescriptor) {
'use strict';
return DeckgridDescriptor.create();
}
]);
/*
* angular-deckgrid
*
* Copyright(c) 2013-2014 André König <[email protected]>
* MIT Licensed
*
*/
/**
* @author André König ([email protected])
*
*/
angular.module('akoenig.deckgrid').factory('DeckgridDescriptor', [
'Deckgrid',
'$templateCache',
'$window',
'$q',
function initialize (Deckgrid, $templateCache, $window, $q) {
'use strict';
/**
* This is a wrapper around the AngularJS
* directive description object.
*
*/
function Descriptor () {
this.restrict = 'AE';
this.template = '<div data-ng-repeat="column in columns" class="{{layout.classList}}">' +
'<div data-ng-repeat="card in column" data-ng-include="cardTemplate"></div>' +
'</div>';
this.scope = {
'model': '=source'
};
//
// Will be created in the linking function.
//
this.$$deckgrid = null;
this.transclude = true;
this.link = this.$$link.bind(this);
//
// Will be incremented if using inline templates.
//
this.$$templateKeyIndex = 0;
}
/**
* @private
*
* Cleanup method. Will be called when the
* deckgrid directive should be destroyed.
*
*/
Descriptor.prototype.$$destroy = function $$destroy () {
this.$$deckgrid.destroy();
};
/**
* @private
*
* The deckgrid link method. Will instantiate the deckgrid.
*
*/
Descriptor.prototype.$$link = function $$link (scope, elem, attrs, nullController, transclude) {
var templateKey = 'deckgrid/innerHtmlTemplate' + (++this.$$templateKeyIndex),
self = this,
styleReady = $q.defer(),
domWatch;
scope.$on('$destroy', this.$$destroy.bind(this));
if (attrs.cardtemplate === undefined) {
if (attrs.cardtemplatestring === undefined) {
// use the provided inner html as template
transclude(scope, function onTransclude (innerHTML) {
var extractedInnerHTML = [],
i = 0,
len = innerHTML.length,
outerHTML;
for (i; i < len; i = i + 1) {
outerHTML = innerHTML[i].outerHTML;
if (outerHTML !== undefined) {
extractedInnerHTML.push(outerHTML);
}
}
$templateCache.put(templateKey, extractedInnerHTML.join());
});
} else {
// use the provided template string
//
// note: the attr is accessed via the elem object, as the attrs content
// is already compiled and thus lacks the {{...}} expressions
$templateCache.put(templateKey, elem.attr('cardtemplatestring'));
}
scope.cardTemplate = templateKey;
} else {
// use the provided template file
scope.cardTemplate = attrs.cardtemplate;
}
scope.mother = scope.$parent;
// Wait for style to be ready on deckgrid element
domWatch = scope.$watch(function() {
return $window.getComputedStyle(elem[0], ':before').content;
}, function(content) {
if (content !== '') {
styleReady.resolve();
// Clear the watcher once element is initialized
domWatch();
}
});
styleReady.promise.then(function() {
self.$$deckgrid = Deckgrid.create(scope, elem[0]);
});
};
return {
create : function create () {
return new Descriptor();
}
};
}
]);
/*
* angular-deckgrid
*
* Copyright(c) 2013-2014 André König <[email protected]>
* MIT Licensed
*
*/
/**
* @author André König ([email protected])
*
*/
angular.module('akoenig.deckgrid').factory('Deckgrid', [
'$window',
'$log',
function initialize ($window, $log) {
'use strict';
/**
* The deckgrid directive.
*
*/
function Deckgrid (scope, element) {
var self = this,
watcher;
this.$$elem = element;
this.$$watchers = [];
this.$$scope = scope;
this.$$scope.columns = [];
//
// The layout configuration will be parsed from
// the pseudo "before element." There you have to save all
// the column configurations.
//
this.$$scope.layout = this.$$getLayout();
this.$$createColumns();
//
// Register model change.
//
watcher = this.$$scope.$watch('model', this.$$onModelChange.bind(this), true);
this.$$watchers.push(watcher);
//
// Register media query change events.
//
angular.forEach(self.$$getMediaQueries(), function onIteration (rule) {
function onDestroy () {
rule.removeListener(self.$$onMediaQueryChange.bind(self));
}
rule.addListener(self.$$onMediaQueryChange.bind(self));
self.$$watchers.push(onDestroy);
});
}
/**
* @private
*
* Extracts the media queries out of the stylesheets.
*
* This method will fetch the media queries out of the stylesheets that are
* responsible for styling the angular-deckgrid.
*
* @return {array} An array with all respective styles.
*
*/
Deckgrid.prototype.$$getMediaQueries = function $$getMediaQueries () {
var stylesheets = [],
mediaQueries = [];
stylesheets = Array.prototype.concat.call(
Array.prototype.slice.call(document.querySelectorAll('style[type=\'text/css\']')),
Array.prototype.slice.call(document.querySelectorAll('link[rel=\'stylesheet\']'))
);
function extractRules (stylesheet) {
try {
return (stylesheet.sheet.cssRules || []);
} catch (e) {
return [];
}
}
function hasDeckgridStyles (rule) {
var regexe = /\[(\w*-)?deckgrid\]::?before/g,
i = 0,
selector = '';
if (!rule.media || angular.isUndefined(rule.cssRules)) {
return false;
}
i = rule.cssRules.length - 1;
for (i; i >= 0; i = i - 1) {
selector = rule.cssRules[i].selectorText;
if (angular.isDefined(selector) && selector.match(regexe)) {
return true;
}
}
return false;
}
angular.forEach(stylesheets, function onIteration (stylesheet) {
var rules = extractRules(stylesheet);
angular.forEach(rules, function inRuleIteration (rule) {
if (hasDeckgridStyles(rule)) {
mediaQueries.push($window.matchMedia(rule.media.mediaText));
}
});
});
return mediaQueries;
};
/**
* @private
*
* Creates the column segmentation. With other words:
* This method creates the internal data structure from the
* passed "source" attribute. Every card within this "source"
* model will be passed into this internal column structure by
* reference. So if you modify the data within your controller
* this directive will reflect these changes immediately.
*
* NOTE that calling this method will trigger a complete template "redraw".
*
*/
Deckgrid.prototype.$$createColumns = function $$createColumns () {
var self = this;
if (!this.$$scope.layout) {
return $log.error('angular-deckgrid: No CSS configuration found (see ' +
'https://github.com/akoenig/angular-deckgrid#the-grid-configuration)');
}
this.$$scope.columns = [];
angular.forEach(this.$$scope.model, function onIteration (card, index) {
var column = (index % self.$$scope.layout.columns) | 0;
if (!self.$$scope.columns[column]) {
self.$$scope.columns[column] = [];
}
card.$index = index;
self.$$scope.columns[column].push(card);
});
};
/**
* @private
*
* Parses the configuration out of the configured CSS styles.
*
* Example:
*
* .deckgrid::before {
* content: '3 .column.size-1-3';
* }
*
* Will result in a three column grid where each column will have the
* classes: "column size-1-3".
*
* You are responsible for defining the respective styles within your CSS.
*
*/
Deckgrid.prototype.$$getLayout = function $$getLayout () {
var content = $window.getComputedStyle(this.$$elem, ':before').content,
layout;
if (content) {
content = content.replace(/'/g, ''); // before e.g. '3 .column.size-1of3'
content = content.replace(/"/g, ''); // before e.g. "3 .column.size-1of3"
content = content.split(' ');
if (2 === content.length) {
layout = {};
layout.columns = (content[0] | 0);
layout.classList = content[1].replace(/\./g, ' ').trim();
}
}
return layout;
};
/**
* @private
*
* Event that will be triggered if a CSS media query changed.
*
*/
Deckgrid.prototype.$$onMediaQueryChange = function $$onMediaQueryChange () {
var self = this,
layout = this.$$getLayout();
//
// Okay, the layout has changed.
// Creating a new column structure is not avoidable.
//
if (layout.columns !== this.$$scope.layout.columns) {
self.$$scope.layout = layout;
self.$$scope.$apply(function onApply () {
self.$$createColumns();
});
}
};
/**
* @private
*
* Event that will be triggered when the source model has changed.
*
*/
Deckgrid.prototype.$$onModelChange = function $$onModelChange (newModel, oldModel) {
var self = this;
newModel = newModel || [];
oldModel = oldModel || [];
if (oldModel.length !== newModel.length) {
self.$$createColumns();
}
};
/**
* Destroys the directive. Takes care of cleaning all
* watchers and event handlers.
*
*/
Deckgrid.prototype.destroy = function destroy () {
var i = this.$$watchers.length - 1;
for (i; i >= 0; i = i - 1) {
this.$$watchers[i]();
}
};
return {
create : function create (scope, element) {
return new Deckgrid(scope, element);
}
};
}
]);