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/* Namespace for core functionality related to modal dialogs.
*
* Modals in Horizon are treated as a "stack", e.g new ones are added to the
* top of the stack, and they are always removed in a last-in-first-out
* order. This allows for things like swapping between modals as part of a
* workflow, for confirmations, etc.
*
* When a new modal is loaded into the DOM, it fires a "new_modal" event which
* event handlers can listen for. However, for consistency, it is better to
* add methods which should be run on instantiation of any new modal to be
* applied via the horizon.modals.addModalInitFunction method.
*/
horizon.modals = {
// Storage for our current jqXHR object.
_request: null,
spinner: null,
_init_functions: []
};
horizon.modals.addModalInitFunction = function (f) {
horizon.modals._init_functions.push(f);
};
horizon.modals.initModal = function (modal) {
$(horizon.modals._init_functions).each(function (index, f) {
f(modal);
});
};
/* Creates a modal dialog from the client-side template. */
horizon.modals.create = function (title, body, confirm, cancel) {
if (!cancel) {
cancel = gettext("Cancel");
}
var template = horizon.templates.compiled_templates["#modal_template"],
params = {title: title, body: body, confirm: confirm, cancel: cancel},
modal = $(template.render(params)).appendTo("#modal_wrapper");
return modal;
};
horizon.modals.success = function (data, textStatus, jqXHR) {
var modal;
$('#modal_wrapper').append(data);
$('.modal span.help-block').hide();
modal = $('.modal:last');
modal.modal();
$(modal).trigger("new_modal", modal);
return modal;
};
horizon.modals.modal_spinner = function (text) {
// Adds a spinner with the desired text in a modal window.
var template = horizon.templates.compiled_templates["#spinner-modal"];
horizon.modals.spinner = $(template.render({text: text}));
horizon.modals.spinner.appendTo("#modal_wrapper");
horizon.modals.spinner.modal({backdrop: 'static'});
horizon.modals.spinner.spin(horizon.conf.spinner_options.modal);
};
horizon.addInitFunction(function() {
// Bind handler for initializing new modals.
$('#modal_wrapper').on('new_modal', function (evt, modal) {
horizon.modals.initModal(modal);
});
// Bind "cancel" button handler.
$(document).on('click', '.modal .cancel', function (evt) {
$(this).closest('.modal').modal('hide');
evt.preventDefault();
});
// AJAX form submissions from modals. Makes validation happen in-modal.
$(document).on('submit', '.modal form', function (evt) {
var $form = $(this),
$button = $form.find(".modal-footer .btn-primary"),
update_field_id = $form.attr("data-add-to-field"),
headers = {};
if ($form.attr("enctype") === "multipart/form-data") {
// AJAX-upload for files is not currently supported.
return;
}
evt.preventDefault();
// Prevent duplicate form POSTs
$button.prop("disabled", true);
if (update_field_id) {
headers["X-Horizon-Add-To-Field"] = update_field_id;
}
$.ajax({
type: "POST",
url: $form.attr('action'),
headers: headers,
data: $form.serialize(),
beforeSend: function () {
$("#modal_wrapper .modal").last().modal("hide");
horizon.modals.modal_spinner(gettext("Working"));
},
complete: function () {
horizon.modals.spinner.modal('hide');
$("#modal_wrapper .modal").last().modal("show");
$button.prop("disabled", false);
},
success: function (data, textStatus, jqXHR) {
var redirect_header = jqXHR.getResponseHeader("X-Horizon-Location"),
add_to_field_header = jqXHR.getResponseHeader("X-Horizon-Add-To-Field"),
json_data, field_to_update;
$form.closest(".modal").modal("hide");
if (redirect_header) {
location.href = redirect_header;
}
else if (add_to_field_header) {
json_data = $.parseJSON(data);
field_to_update = $("#" + add_to_field_header);
field_to_update.append("<option value='" + json_data[0] + "'>" + json_data[1] + "</option>");
field_to_update.change();
field_to_update.val(json_data[0]);
} else {
horizon.modals.success(data, textStatus, jqXHR);
}
},
error: function (jqXHR, status, errorThrown) {
if (jqXHR.getResponseHeader('logout')) {
location.href = jqXHR.getResponseHeader("X-Horizon-Location");
} else {
$form.closest(".modal").modal("hide");
horizon.alert("error", gettext("There was an error submitting the form. Please try again."));
}
}
});
});
// Position modal so it's in-view even when scrolled down.
$(document).on('show', '.modal', function (evt) {
// Filter out indirect triggers of "show" from (for example) tabs.
if ($(evt.target).hasClass("modal")) {
var scrollShift = $('body').scrollTop() || $('html').scrollTop(),
$this = $(this),
topVal = $this.css('top');
$this.css('top', scrollShift + parseInt(topVal, 10));
}
});
// Focus the first usable form field in the modal for accessibility.
horizon.modals.addModalInitFunction(function (modal) {
$(modal).find(":text, select, textarea").filter(":visible:first").focus();
});
horizon.modals.addModalInitFunction(horizon.datatables.validate_button);
// Load modals for ajax-modal links.
$(document).on('click', '.ajax-modal', function (evt) {
var $this = $(this);
// If there's an existing modal request open, cancel it out.
if (horizon.modals._request && typeof(horizon.modals._request.abort) !== undefined) {
horizon.modals._request.abort();
}
horizon.modals._request = $.ajax($this.attr('href'), {
beforeSend: function () {
horizon.modals.modal_spinner(gettext("Loading"));
},
complete: function () {
// Clear the global storage;
horizon.modals._request = null;
horizon.modals.spinner.modal('hide');
},
error: function(jqXHR, status, errorThrown) {
if (jqXHR.status === 401){
var redir_url = jqXHR.getResponseHeader("X-Horizon-Location");
if (redir_url){
location.href = redir_url;
} else {
location.reload(true);
}
}
else {
if (!horizon.ajax.get_messages(jqXHR)) {
// Generic error handler. Really generic.
horizon.alert("error", gettext("An error occurred. Please try again later."));
}
}
},
success: function (data, textStatus, jqXHR) {
var update_field_id = $this.attr('data-add-to-field'),
modal, form;
modal = horizon.modals.success(data, textStatus, jqXHR);
if (update_field_id) {
form = modal.find("form");
if (form.length) {
form.attr("data-add-to-field", update_field_id);
}
}
}
});
evt.preventDefault();
});
/* Manage the modal "stack" */
// When a new modal is opened, hide any that are already in the stack.
$(document).on("show", ".modal", function () {
var container = $("#modal_wrapper"),
modal_stack = container.find(".modal"),
$this = $(this);
modal_stack.splice(modal_stack.length - 1, 1);
modal_stack.modal("hide");
});
// After a modal has been fully hidden, remove it to avoid confusion.
// Note: the modal should only be removed if it is the "top" of the stack of
// modals, e.g. it's the one currently being interacted with and isn't just
// temporarily being hidden.
$(document).on('hidden', '.modal', function () {
var $this = $(this),
modal_stack = $("#modal_wrapper .modal");
if ($this[0] == modal_stack.last()[0] || $this.hasClass("loading")) {
$this.remove();
if (!$this.hasClass("loading")) {
$("#modal_wrapper .modal").last().modal("show");
}
}
});
});
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