VulpesOS/assets/webapps/camera.gaiamobile.org/bower_components/gaia-component/gaia-component.js

;
(function (define) {
    'use strict';
    define([
        'require',
        'exports',
        'module'
    ], function (require, exports, module) {
        var textContent = Object.getOwnPropertyDescriptor(Node.prototype, 'textContent');
        var innerHTML = Object.getOwnPropertyDescriptor(Element.prototype, 'innerHTML');
        var removeAttribute = Element.prototype.removeAttribute;
        var setAttribute = Element.prototype.setAttribute;
        var noop = function () {
        };
        exports.register = function (name, props) {
            var baseProto = getBaseProto(props.extends);
            var template = props.template || baseProto.templateString;
            var extensible = props.extensible = props.hasOwnProperty('extensible') ? props.extensible : true;
            delete props.extends;
            if (template) {
                if (extensible && props.template) {
                    props.templateString = props.template;
                }
                var output = processCss(template, name);
                props.template = document.createElement('template');
                props.template.innerHTML = output.template;
                props.lightCss = output.lightCss;
                props.globalCss = props.globalCss || '';
                props.globalCss += output.globalCss;
            }
            injectGlobalCss(props.globalCss);
            delete props.globalCss;
            var descriptors = mixin(props.attrs || {}, base.descriptors);
            props._attrs = props.attrs;
            delete props.attrs;
            var proto = createProto(baseProto, props);
            Object.defineProperties(proto, descriptors);
            try {
                return document.registerElement(name, { prototype: proto });
            } catch (e) {
                if (e.name !== 'NotSupportedError') {
                    throw e;
                }
            }
        };
        var base = {
            properties: {
                GaiaComponent: true,
                attributeChanged: noop,
                attached: noop,
                detached: noop,
                created: noop,
                createdCallback: function () {
                    if (this.dirObserver) {
                        addDirObserver();
                    }
                    injectLightCss(this);
                    this.created();
                },
                attributeChangedCallback: function (name, from, to) {
                    var prop = toCamelCase(name);
                    if (this._attrs && this._attrs[prop]) {
                        this[prop] = to;
                    }
                    this.attributeChanged(name, from, to);
                },
                attachedCallback: function () {
                    if (this.dirObserver) {
                        this.setInnerDirAttributes = setInnerDirAttributes.bind(null, this);
                        document.addEventListener('dirchanged', this.setInnerDirAttributes);
                    }
                    this.attached();
                },
                detachedCallback: function () {
                    if (this.dirObserver) {
                        document.removeEventListener('dirchanged', this.setInnerDirAttributes);
                    }
                    this.detached();
                },
                setupShadowRoot: function () {
                    if (!this.template) {
                        return;
                    }
                    var node = document.importNode(this.template.content, true);
                    this.createShadowRoot().appendChild(node);
                    if (this.dirObserver) {
                        setInnerDirAttributes(this);
                    }
                    return this.shadowRoot;
                },
                setAttr: function (name, value) {
                    var internal = this.shadowRoot.firstElementChild;
                    setAttribute.call(internal, name, value);
                    setAttribute.call(this, name, value);
                },
                removeAttr: function (name) {
                    var internal = this.shadowRoot.firstElementChild;
                    removeAttribute.call(internal, name);
                    removeAttribute.call(this, name);
                }
            },
            descriptors: {
                textContent: {
                    set: function (value) {
                        textContent.set.call(this, value);
                        if (this.lightStyle) {
                            this.appendChild(this.lightStyle);
                        }
                    },
                    get: function () {
                        return textContent.get();
                    }
                },
                innerHTML: {
                    set: function (value) {
                        innerHTML.set.call(this, value);
                        if (this.lightStyle) {
                            this.appendChild(this.lightStyle);
                        }
                    },
                    get: innerHTML.get
                }
            }
        };
        var defaultPrototype = createProto(HTMLElement.prototype, base.properties);
        function getBaseProto(proto) {
            if (!proto) {
                return defaultPrototype;
            }
            proto = proto.prototype || proto;
            return !proto.GaiaComponent ? createProto(proto, base.properties) : proto;
        }
        function createProto(proto, props) {
            return mixin(Object.create(proto), props);
        }
        var hasShadowCSS = function () {
            var div = document.createElement('div');
            try {
                div.querySelector(':host');
                return true;
            } catch (e) {
                return false;
            }
        }();
        var regex = {
            shadowCss: /(?:\:host|\:\:content)[^{]*\{[^}]*\}/g,
            ':host': /(?:\:host)/g,
            ':host()': /\:host\((.+)\)(?: \:\:content)?/g,
            ':host-context': /\:host-context\((.+)\)([^{,]+)?/g,
            '::content': /(?:\:\:content)/g
        };
        function processCss(template, name) {
            var globalCss = '';
            var lightCss = '';
            if (!hasShadowCSS) {
                template = template.replace(regex.shadowCss, function (match) {
                    var hostContext = regex[':host-context'].exec(match);
                    if (hostContext) {
                        globalCss += match.replace(regex['::content'], '').replace(regex[':host-context'], '$1 ' + name + '$2').replace(/ +/g, ' ');
                    } else {
                        lightCss += match.replace(regex[':host()'], name + '$1').replace(regex[':host'], name).replace(regex['::content'], name);
                    }
                    return '';
                });
            }
            return {
                template: template,
                lightCss: lightCss,
                globalCss: globalCss
            };
        }
        function injectGlobalCss(css) {
            if (!css) {
                return;
            }
            var style = document.createElement('style');
            style.innerHTML = css.trim();
            headReady().then(function () {
                document.head.appendChild(style);
            });
        }
        function headReady() {
            return new Promise(function (resolve) {
                if (document.head) {
                    return resolve();
                }
                window.addEventListener('load', function fn() {
                    window.removeEventListener('load', fn);
                    resolve();
                });
            });
        }
        function injectLightCss(el) {
            if (hasShadowCSS) {
                return;
            }
            var stylesheet = el.querySelector('style');
            if (!stylesheet) {
                stylesheet = document.createElement('style');
                stylesheet.setAttribute('scoped', '');
                stylesheet.appendChild(document.createTextNode(el.lightCss));
                el.appendChild(stylesheet);
            }
            el.lightStyle = stylesheet;
        }
        function toCamelCase(string) {
            return string.replace(/-(.)/g, function replacer(string, p1) {
                return p1.toUpperCase();
            });
        }
        var dirObserver;
        function setInnerDirAttributes(component) {
            var dir = component.dir || document.dir;
            Array.from(component.shadowRoot.children).forEach(element => {
                if (element.nodeName !== 'STYLE') {
                    element.dir = dir;
                }
            });
        }
        function addDirObserver() {
            if (dirObserver) {
                return;
            }
            dirObserver = new MutationObserver(onChanged);
            dirObserver.observe(document.documentElement, {
                attributeFilter: ['dir'],
                attributes: true
            });
            function onChanged(mutations) {
                document.dispatchEvent(new Event('dirchanged'));
            }
        }
        function mixin(target, source) {
            for (var key in source) {
                target[key] = source[key];
            }
            return target;
        }
    });
}(typeof define == 'function' && define.amd ? define : function (n, w) {
    'use strict';
    return typeof module == 'object' ? function (c) {
        c(require, exports, module);
    } : function (c) {
        var m = { exports: {} };
        c(function (n) {
            return w[n];
        }, m.exports, m);
        w[n] = m.exports;
    };
}('gaia-component', this)));