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3f5a7b31c8
Summary: Currently, when a dialog is submitted the Workflow itself emits an event but no DOM event is emitted. The workflow event is fine for handlers which only use JS, but there's currently no way for a handler to act more like a normal form handler. This event gives normal form handlers a way to capture Workflow submits and muck around with form contents, etc. Test Plan: In a future diff, edited policies via a Workflow dialog. Reviewers: btrahan Reviewed By: btrahan CC: aran Differential Revision: https://secure.phabricator.com/D7295
310 lines
8.5 KiB
JavaScript
310 lines
8.5 KiB
JavaScript
/**
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* @requires javelin-stratcom
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* javelin-request
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* javelin-dom
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* javelin-vector
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* javelin-install
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* javelin-util
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* javelin-mask
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* javelin-uri
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* @provides javelin-workflow
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* @javelin
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*/
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/**
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* @group workflow
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*/
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JX.install('Workflow', {
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construct : function(uri, data) {
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if (__DEV__) {
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if (!uri || uri == '#') {
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JX.$E(
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'new JX.Workflow(<?>, ...): '+
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'bogus URI provided when creating workflow.');
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}
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}
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this.setURI(uri);
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this.setData(data || {});
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},
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events : ['error', 'finally', 'submit'],
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statics : {
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_stack : [],
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newFromForm : function(form, data) {
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var pairs = JX.DOM.convertFormToListOfPairs(form);
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for (var k in data) {
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pairs.push([k, data[k]]);
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}
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// Disable form elements during the request
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var inputs = [].concat(
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JX.DOM.scry(form, 'input'),
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JX.DOM.scry(form, 'button'),
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JX.DOM.scry(form, 'textarea'));
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for (var ii = 0; ii < inputs.length; ii++) {
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if (inputs[ii].disabled) {
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delete inputs[ii];
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} else {
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inputs[ii].disabled = true;
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}
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}
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var workflow = new JX.Workflow(form.getAttribute('action'), {});
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workflow.setDataWithListOfPairs(pairs);
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workflow.setMethod(form.getAttribute('method'));
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workflow.listen('finally', function() {
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// Re-enable form elements
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for (var ii = 0; ii < inputs.length; ii++) {
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inputs[ii] && (inputs[ii].disabled = false);
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}
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});
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return workflow;
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},
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newFromLink : function(link) {
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var workflow = new JX.Workflow(link.href);
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return workflow;
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},
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_push : function(workflow) {
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JX.Mask.show();
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JX.Workflow._stack.push(workflow);
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},
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_pop : function() {
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var dialog = JX.Workflow._stack.pop();
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(dialog.getCloseHandler() || JX.bag)();
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dialog._destroy();
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JX.Mask.hide();
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},
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disable : function() {
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JX.Workflow._disabled = true;
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},
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_onbutton : function(event) {
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if (JX.Stratcom.pass()) {
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return;
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}
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if (JX.Workflow._disabled) {
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return;
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}
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event.prevent();
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// Get the button (which is sometimes actually another tag, like an <a />)
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// which triggered the event. In particular, this makes sure we get the
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// right node if there is a <button> with an <img /> inside it or
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// or something similar.
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var t = event.getNode('jx-workflow-button') ||
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event.getNode('tag:button');
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if (t.name == '__cancel__' || t.name == '__close__') {
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JX.Workflow._pop();
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} else {
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var form = event.getNode('jx-dialog');
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// Issue a DOM event first, so form-oriented handlers can act.
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var dom_event = JX.DOM.invoke(form, 'didWorkflowSubmit');
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if (dom_event.getPrevented()) {
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return;
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}
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var data = JX.DOM.convertFormToListOfPairs(form);
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data.push([t.name, t.value || true]);
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var active = JX.Workflow._getActiveWorkflow();
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var e = active.invoke('submit', {form: form, data: data});
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if (!e.getStopped()) {
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active._destroy();
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active
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.setURI(form.getAttribute('action') || active.getURI())
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.setDataWithListOfPairs(data)
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.start();
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}
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}
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},
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_getActiveWorkflow : function() {
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var stack = JX.Workflow._stack;
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return stack[stack.length - 1];
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}
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},
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members : {
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_root : null,
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_pushed : false,
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_data : null,
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_onload : function(r) {
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// It is permissible to send back a falsey redirect to force a page
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// reload, so we need to take this branch if the key is present.
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if (r && (typeof r.redirect != 'undefined')) {
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JX.$U(r.redirect).go();
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} else if (r && r.dialog) {
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this._push();
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this._root = JX.$N(
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'div',
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{className: 'jx-client-dialog'},
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JX.$H(r.dialog));
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JX.DOM.listen(
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this._root,
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'click',
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[['jx-workflow-button'], ['tag:button']],
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JX.Workflow._onbutton);
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document.body.appendChild(this._root);
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var d = JX.Vector.getDim(this._root);
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var v = JX.Vector.getViewport();
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var s = JX.Vector.getScroll();
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// Normally, we position dialogs 100px from the top of the screen.
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// Use more space if the dialog is large (at least roughly the size
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// of the viewport).
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var offset = Math.min(Math.max(20, (v.y - d.y) / 2), 100);
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JX.$V((v.x - d.x) / 2, s.y + offset).setPos(this._root);
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try {
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JX.DOM.focus(JX.DOM.find(this._root, 'button', '__default__'));
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var inputs = JX.DOM.scry(this._root, 'input')
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.concat(JX.DOM.scry(this._root, 'textarea'));
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var miny = Number.POSITIVE_INFINITY;
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var target = null;
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for (var ii = 0; ii < inputs.length; ++ii) {
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if (inputs[ii].type != 'hidden') {
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// Find the topleft-most displayed element.
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var p = JX.$V(inputs[ii]);
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if (p.y < miny) {
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miny = p.y;
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target = inputs[ii];
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}
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}
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}
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target && JX.DOM.focus(target);
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} catch (_ignored) {}
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// The `focus()` call may have scrolled the window. Scroll it back to
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// where it was before -- we want to focus the control, but not adjust
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// the scroll position.
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window.scrollTo(s.x, s.y);
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} else if (this.getHandler()) {
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this.getHandler()(r);
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this._pop();
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} else if (r) {
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if (__DEV__) {
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JX.$E('Response to workflow request went unhandled.');
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}
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}
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},
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_push : function() {
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if (!this._pushed) {
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this._pushed = true;
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JX.Workflow._push(this);
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}
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},
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_pop : function() {
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if (this._pushed) {
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this._pushed = false;
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JX.Workflow._pop();
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}
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},
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_destroy : function() {
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if (this._root) {
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JX.DOM.remove(this._root);
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this._root = null;
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}
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},
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start : function() {
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var uri = this.getURI();
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var method = this.getMethod();
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var r = new JX.Request(uri, JX.bind(this, this._onload));
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var list_of_pairs = this._data;
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list_of_pairs.push(['__wflow__', true]);
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r.setDataWithListOfPairs(list_of_pairs);
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r.setDataSerializer(this.getDataSerializer());
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if (method) {
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r.setMethod(method);
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}
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r.listen('finally', JX.bind(this, this.invoke, 'finally'));
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r.listen('error', JX.bind(this, function(error) {
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var e = this.invoke('error', error);
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if (e.getStopped()) {
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return;
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}
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// TODO: Default error behavior? On Facebook Lite, we just shipped the
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// user to "/error/". We could emit a blanket 'workflow-failed' type
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// event instead.
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}));
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r.send();
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},
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setData : function(dictionary) {
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this._data = [];
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for (var k in dictionary) {
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this._data.push([k, dictionary[k]]);
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}
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return this;
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},
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setDataWithListOfPairs : function(list_of_pairs) {
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this._data = list_of_pairs;
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return this;
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}
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},
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properties : {
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handler : null,
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closeHandler : null,
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dataSerializer : null,
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method : null,
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URI : null
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},
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initialize : function() {
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function close_dialog_when_user_presses_escape(e) {
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if (e.getSpecialKey() != 'esc') {
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// Some key other than escape.
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return;
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}
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if (JX.Workflow._disabled) {
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// Workflows are disabled on this page.
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return;
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}
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if (JX.Stratcom.pass()) {
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// Something else swallowed the event.
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return;
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}
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var active = JX.Workflow._getActiveWorkflow();
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if (!active) {
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// No active workflow.
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return;
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}
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// Note: the cancel button is actually an <a /> tag.
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var buttons = JX.DOM.scry(active._root, 'a', 'jx-workflow-button');
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if (!buttons.length) {
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// No buttons in the dialog.
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return;
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}
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var cancel = null;
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for (var ii = 0; ii < buttons.length; ii++) {
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if (buttons[ii].name == '__cancel__') {
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cancel = buttons[ii];
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break;
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}
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}
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if (!cancel) {
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// No 'Cancel' button.
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return;
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}
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JX.Workflow._pop();
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e.prevent();
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}
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JX.Stratcom.listen('keydown', null, close_dialog_when_user_presses_escape);
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}
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});
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