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Creates an accessible easy-to-use dialog.\r\n *\r\n *  The Dialog requires some specific set up to coordinate and control the\r\n *  dialog features.\r\n *\r\n *  The dialog requires a script block of type \"application/dialog\" and an id\r\n *  attribute. If the \"data-dialog-persistent\" attribute is provided, the\r\n *  dialog will not allow the user to dismiss the dialog without your function\r\n *  deciding so. (Escape won't dismiss the dialog, nor will clicking the\r\n *  dismiss button, nor will clicking the overlay.)\r\n *\r\n *  There are 5 event properties, 2 get properties, and 3 methods available for\r\n *  configuration and calling.\r\n *\r\n *  Events:\r\n *   - onbeforeshow(dialog, container[, data]) => true: called before the dialog\r\n *       is to be presented to the user, allowing calling code to do some work and\r\n *       prevent the dialog from showing if necessary. Needs to return a boolean\r\n *       or a promise. The optional data parameter contains the data that may have\r\n *       been passed when calling open().\r\n *   - onclick(command, e, dialog, container): called in response to a button click\r\n *       and provides the data-dialog-command text as the first parameter.\r\n *   - onclosed(dialog, container): called after the dialog box has been closed\r\n *       in any fashion, allowing the caller to clean up if necessary.\r\n *   - oncreated(dialog, container): called *once* after the dialog has been\r\n *       created and before the \"onbeforeshow\" event. Provides the container\r\n *       to allow calling code to interact with the DOM before the dialog is\r\n *       shown.\r\n *   - onshow(dialog, container[, data]): called after the dialog has been added to\r\n *        the DOM and is presented to the user. The optional data parameter contains\r\n *        the data that may have been passed when calling open().\r\n *\r\n *    In all the types presented above, \"dialog\" is the dialog object,\r\n *    \"container\" is the container HTMLDivElement DOM object (not the overlay),\r\n *    \"command\" is the value of the data-dialog-command on a button, and \"e\"\r\n *    is the actual click event.\r\n *\r\n *  Properties:\r\n *   - disabled: Boolean. Disables or enables controls and the dialog.\r\n *   - name: String. Gets the name of the dialog.\r\n *\r\n *  Methods:\r\n *   - close(): Closes the dialog and fires the necessary events.\r\n *   - focus(index || 0):\r\n         Returns focus to the dialog's first focusable element based on the\r\n         optional index provided. Pass -1 to focus on the dismiss button.\r\n *   - open([data]):\r\n *       Opens the dialog and fires the necessary events. If the data parameter\r\n *       is provided, it will be passed as the last parameter on both onbeforeshow\r\n *       and onshow. The dialog ignores the data parameter but can be used to pass\r\n *       arbitrary data to the event handlers.\r\n *\r\n *  Example:\r\n *  <button data-dialog=\"space-delete-confirmation\" type=\"button\">Delete Space</button>\r\n *\r\n *  <script type=\"application/dialog\" id=\"space-delete-confirmation\">\r\n *    <form action=\"@Url.Action(\"DeleteSpaceAsync\", new { spaceId = Model.Id })\" method=\"delete\">\r\n *      @Html.AntiForgeryToken()\r\n *      <h2 class=\"title\">Are you sure you want to delete this space?</h2>\r\n *      <p class=\"description\">\r\n *         By deleting this space, you will remove any curriculum and related service times\r\n *         associated with this space.\r\n *      </p>\r\n *      <p>This action cannot be undone.</p>\r\n *      <div class=\"buttons\">\r\n *        <button type=\"submit\" class=\"delete\">Delete Space</button>\r\n *      </div>\r\n *    </form>\r\n *  </script>\r\n */\r\nclass Dialog {\r\n    constructor(name) {\r\n        this._container = document.getElementById(name);\r\n        this._disabled = false;\r\n        this._name = name;\r\n\r\n        // Only wire it up if we found the elements, since access levels could prevent them from being emitted.\r\n        if (this._container) {\r\n            this._init();\r\n        }\r\n    }\r\n\r\n    /* Public properties and methods */\r\n    get onbeforeshow() { return this._onbeforeshow || ((dialog, container) => true); }\r\n    set onbeforeshow(value) { this._onbeforeshow = value; }\r\n\r\n    get onclick() { return this._onclick || ((command, e, dialog) => {}); }\r\n    set onclick(value) { this._onclick = value; }\r\n\r\n    get onclosed() { return this._onclosed || ((dialog, container) => {}); }\r\n    set onclosed(value) { this._onclosed = value; }\r\n\r\n    get oncreated() { return this._oncreated || ((dialog, container) => {}); }\r\n    set oncreated(value) { this._oncreated = value; }\r\n\r\n    get onshow() { return this._onshow || ((dialog, container) => {}); }\r\n    set onshow(value) { this._onshow = value; }\r\n\r\n    get disabled() { return this._disabled; }\r\n    set disabled(value) {\r\n        this._disabled = !!value;\r\n        this._setDisabled(this._disabled);\r\n    }\r\n\r\n    get name() { return this._name; }\r\n\r\n    close() { this._closeDialog(); }\r\n\r\n    focus(index) {\r\n        if (!this._overlay.parentNode) {\r\n            return;\r\n        }\r\n\r\n        const elements = this._inputElements;\r\n\r\n        // Adjust the offset for the index based on the persistent flag, this sets -1 to 0 so the\r\n        // dismiss button can be explicitly targeted. If a persistent dialog attempts -1, that's their\r\n        // problem (also, we won't blow up anyway).\r\n        const originalIndex = index || 0;\r\n        index = originalIndex + (this._isPersistent ? 0 : 1);\r\n\r\n        for (; index < elements.length; ++index) {\r\n            const input = elements[index];\r\n            if (input && input.offsetParent) {\r\n                input.focus();\r\n                return;\r\n            }\r\n        }\r\n\r\n        // If we didn't find an element to focus, and we started at the beginning, just exit.\r\n        if (originalIndex === 0) {\r\n            return;\r\n        }\r\n\r\n        // If we didn't find an element to focus from the starting index, try the beginning of the\r\n        // elements to focus on that instead as a last ditch effort.\r\n        for (index = 0; index < elements.length && index < originalIndex + 1; ++index) {\r\n            const input = elements[index];\r\n            if (input && input.offsetParent) {\r\n                input.focus();\r\n                return;\r\n            }\r\n        }\r\n    }\r\n\r\n    open(data) { this._openDialog(data); }\r\n\r\n    /* Private properties and methods */\r\n    get _body() { return this._container.ownerDocument.getElementsByTagName(\"body\")[0]; }\r\n\r\n    get _isPersistent() { return this._container.dataset.dialogPersistent === \"\"; }\r\n\r\n    get _inputElements() { return this._overlay.querySelectorAll(\"input:not([type='hidden']),select,button,a\"); }\r\n\r\n    _animationEnd() {\r\n        this._overlay.parentNode.removeChild(this._overlay);\r\n        this._overlay.classList.remove(\"removing\");\r\n        this._overlay.removeEventListener(\"animationend\", this._animationEndHandler, true);\r\n\r\n        this.onclosed(this, this._overlay.firstChild);\r\n\r\n        if (this._previousActive) {\r\n            this._previousActive.focus();\r\n        }\r\n    }\r\n\r\n    _closeDialog() {\r\n        window.removeEventListener(\"keydown\", this._keyHandler, true);\r\n        if (!this._overlay.parentNode) {\r\n            return;\r\n        }\r\n\r\n        this._overlay.classList.add(\"removing\");\r\n        this._overlay.addEventListener(\"animationend\", this._animationEndHandler, true);\r\n    }\r\n\r\n    _handleClick(e) {\r\n        if (e.target === this._overlay || e.target.classList.contains(\"fa-times\") || e.target.dataset.dialogCommand === \"dismiss\") {\r\n            if (!this._isPersistent) {\r\n                this.close();\r\n            }\r\n\r\n            return;\r\n        }\r\n\r\n        if (e.target instanceof HTMLButtonElement || e.target instanceof HTMLInputElement && (e.target.type === \"button\" || e.target.type === \"submit\" || e.target.type === \"reset\")) {\r\n            this.onclick(e.target.dataset.dialogCommand, e, this, this._overlay.firstChild);\r\n        }\r\n    }\r\n\r\n    _handleKeyDown(e) {\r\n        if (!this._overlay.contains(e.target)) {\r\n            return;\r\n        }\r\n\r\n        // keyCode is for compatibility with Safari, everyone else uses key.\r\n        if (e.key === \"Escape\" || e.keyCode === 27) {\r\n            if (!this._isPersistent) {\r\n                this.close();\r\n            }\r\n            return;\r\n        }\r\n\r\n        // keyCode is for compatibility with Safari, everyone else uses key.\r\n        if (e.key === \"Tab\" || e.keyCode === 9) {\r\n            if (!e.shiftKey && e.target === this._inputElements[this._inputElements.length - 1]) {\r\n                this._inputElements[0].focus();\r\n                e.preventDefault();\r\n                return false;\r\n            }\r\n\r\n            if (e.shiftKey && e.target === this._inputElements[0]) {\r\n                this._inputElements[this._inputElements.length - 1].focus();\r\n                e.preventDefault();\r\n                return false;\r\n            }\r\n        }\r\n    }\r\n\r\n    _init() {\r\n        this._buttons = document.querySelectorAll(\"[data-dialog='\" + this._name + \"']\");\r\n        if (this._buttons) {\r\n            for (let i = 0; i < this._buttons.length; i++)\r\n                this._buttons[i].addEventListener(\"click\", this._openDialog.bind(this), true);\r\n        }\r\n\r\n        this._keyHandler = this._handleKeyDown.bind(this);\r\n        this._animationEndHandler = this._animationEnd.bind(this);\r\n    }\r\n\r\n    _openDialog(data) {\r\n        const body = this._body;\r\n\r\n        // If we haven't created our overlay/content elements yet, do so now.\r\n        if (!this._overlay) {\r\n            this._overlay = body.ownerDocument.createElement(\"div\");\r\n            this._overlay.classList.add(\"dialog\");\r\n\r\n            const content = body.ownerDocument.createElement(\"div\");\r\n            content.classList.add(\"dialog-box\");\r\n            content.classList.add(this._name);\r\n            content.innerHTML = this._container.text;\r\n            this._overlay.appendChild(content);\r\n\r\n            // Add the dismiss button if we were told to.\r\n            if (!this._isPersistent) {\r\n                const times = body.ownerDocument.createElement(\"i\");\r\n                times.className = \"fa fa-times\";\r\n                times.setAttribute(\"aria-hidden\", \"true\");\r\n\r\n                const dismiss = body.ownerDocument.createElement(\"button\");\r\n                dismiss.className = \"dialog-dismiss\";\r\n                dismiss.id = this.name + \"-dismiss\";\r\n                dismiss.setAttribute(\"aria-label\", \"Close Dialog\");\r\n                dismiss.dataset.dialogCommand = \"dismiss\";\r\n                dismiss.appendChild(times);\r\n                content.insertBefore(dismiss, content.firstChild);\r\n            }\r\n\r\n            // Add our aria labels.\r\n            this._overlay.setAttribute(\"role\", \"dialog\");\r\n            const title = this._overlay.querySelector(\".title\");\r\n            if (title) {\r\n                title.id = this._name + \"-title\";\r\n                this._overlay.setAttribute(\"aria-labelledby\", title.id);\r\n            }\r\n\r\n            const description = this._overlay.querySelector(\".description\");\r\n            if (description) {\r\n                description.id = this._name + \"-description\";\r\n                this._overlay.setAttribute(\"aria-describedby\", description.id);\r\n            }\r\n\r\n            // Disable our elements if we were disabled before we created the dialog.\r\n            this._setDisabled(this._disabled);\r\n            this._overlay.addEventListener(\"click\", this._handleClick.bind(this), false);\r\n\r\n            // Let the caller know we created the dialog if they want to do something.\r\n            this.oncreated(this, this._overlay.firstChild);\r\n        }\r\n\r\n        const shouldShow = this.onbeforeshow(this, this._overlay.firstChild, data);\r\n        if (!shouldShow) {\r\n            return;\r\n        }\r\n\r\n        if (typeof shouldShow.then === \"function\") {\r\n            shouldShow.then(() => this._showDialog(data));\r\n            return;\r\n        }\r\n\r\n        this._showDialog(data);\r\n    }\r\n\r\n    _setDisabled() {\r\n        if (!this._overlay) {\r\n            return;\r\n        }\r\n\r\n        const elements = this._inputElements;\r\n        for (let i = 0; i < elements.length; i++) {\r\n            elements[i].disabled = this._disabled;\r\n        }\r\n    }\r\n\r\n    _showDialog(data) {\r\n        if (!this._overlay || this._overlay.parentNode) {\r\n            return;\r\n        }\r\n\r\n        window.addEventListener(\"keydown\", this._keyHandler, true);\r\n        this._body.appendChild(this._overlay);\r\n\r\n        this._previousActive = this._overlay.ownerDocument.activeElement;\r\n        this.focus();\r\n\r\n        this.onshow(this, this._overlay.firstChild, data);\r\n    }\r\n}\r\n\r\nexport { Dialog };\r\n"]}