227 lines
10 KiB
JavaScript
227 lines
10 KiB
JavaScript
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/**
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* <modal>
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* -----------------------------------------------------------------------------
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* A modal dialog pop-up.
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*
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* > Be careful adding other Vue.js lifecycle callbacks in this file! The
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* > finnicky combination of Vue transitions and bootstrap modal animations used
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* > herein work, and are very well-tested in practical applications. But any
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* > changes to that specific cocktail could be unpredictable, with unsavory
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* > consequences.
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*
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* @type {Component}
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*
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* @event close [emitted when the closing process begins]
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* @event opened [emitted when the opening process is completely done]
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* -----------------------------------------------------------------------------
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*/
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parasails.registerComponent('modal', {
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// ╔═╗╦═╗╔═╗╔═╗╔═╗
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// ╠═╝╠╦╝║ ║╠═╝╚═╗
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// ╩ ╩╚═╚═╝╩ ╚═╝
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props: [
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'hideCloseButton'//« removes the default "x" button
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],
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// ╦╔╗╔╦╔╦╗╦╔═╗╦ ╔═╗╔╦╗╔═╗╔╦╗╔═╗
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// ║║║║║ ║ ║╠═╣║ ╚═╗ ║ ╠═╣ ║ ║╣
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// ╩╝╚╝╩ ╩ ╩╩ ╩╩═╝ ╚═╝ ╩ ╩ ╩ ╩ ╚═╝
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data: function (){
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return {
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// Spinlock used for preventing trying to close the bootstrap modal more than once.
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// (in practice it doesn't seem to hurt anything if it tries to close more than once,
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// but still.... better safe than sorry!)
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_bsModalIsAnimatingOut: false,
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isMobileSafari: false,//« more on this below
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originalScrollPosition: undefined,//« more on this below
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};
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},
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// ╦ ╦╔╦╗╔╦╗╦
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// ╠═╣ ║ ║║║║
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// ╩ ╩ ╩ ╩ ╩╩═╝
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template: `
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<transition name="modal" v-on:leave="leave" v-bind:css="false">
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<div class="modal fade" tabindex="-1" role="dialog">
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<div class="petticoat"></div>
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<div class="modal-dialog custom-width position-relative" role="document" purpose="modal-dialog">
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<div class="modal-content" purpose="modal-content">
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<button type="button" style="top: 5px; right: 0; font-size: 28px; line-height: 1;" class="py-2 px-3 position-absolute" data-dismiss="modal" aria-label="Close" purpose="modal-close-button" v-if="!hideCloseButton">×</button>
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<slot></slot>
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</div><!-- /.modal-content -->
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</div><!-- /.modal-dialog -->
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</div><!-- /.modal -->
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</transition>
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`,
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// ╦ ╦╔═╗╔═╗╔═╗╦ ╦╔═╗╦ ╔═╗
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// ║ ║╠╣ ║╣ ║ ╚╦╝║ ║ ║╣
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// ╩═╝╩╚ ╚═╝╚═╝ ╩ ╚═╝╩═╝╚═╝
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beforeMount: function() {
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// If this is mobile safari, make note of it.
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this.isMobileSafari = (typeof bowser !== 'undefined') && bowser.mobile && bowser.safari;
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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// ^^So there's a bug in mobile safari that misplaces the caret when the keyboard opening
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// causes the page to scroll, so we need to do some special tricks to keep it from getting ugly.
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// It's only in iOS 11... we think. Hopefully it will be fixed.
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// In the mean time, we have to get wacky.
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//
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// > More info about the bug here:
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// > https://github.com/twbs/bootstrap/issues/24835#issuecomment-345974819
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// > https://stackoverflow.com/questions/46567233/how-to-fix-the-ios-11-input-element-in-fixed-modals-bug?rq=1
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//
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// FUTURE: maybe the bug will be fixed and we can remove this someday?
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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if(this.isMobileSafari) {
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// Get our original scroll position before opening the modal and save it for later.
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this.originalScrollPosition = $(window).scrollTop();
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}
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},
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mounted: function(){
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// ^^ Note that this is not an `async function`.
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// This is just to be safe, since the timing here is a little tricky w/ the
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// animations and the fact that we're integrating with Bootstrap's modal.
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// (That said, it might work fine-- just hasn't been extensively tested.)
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// Immediately call out to the Bootstrap modal and tell it to show itself.
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$(this.$el).modal({
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// Set the modal backdrop to the 'static' option, which means it doesn't close the modal
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// when clicked.
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backdrop: 'static',
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show: true
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});
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// Attach listener for underlying custom modal closing event,
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// and when that happens, have Vue emit a custom "close" event.
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// (Note: This isn't just for convenience-- it's crucial that
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// the parent logic can use this event to update its scope.)
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$(this.$el).on('hide.bs.modal', ()=>{
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// Undo any mobile safari workarounds we may have added.
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// (i.e. shed the wackiness)
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if(this.isMobileSafari) {
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// Remove style overrides on our modal dialog.
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$(this.$el).css({
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'overflow-y': '',
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'position': '',
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'left': '',
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'top': '',
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});
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// Beckon to our siblings so they come out of hiding
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this.$get().parent().children().not(this.$el).css({
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'display': ''
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});
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// Scroll to our original position when the modal was summoned.
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window.scrollTo(0, this.originalScrollPosition);
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}//fi
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this._bsModalIsAnimatingOut = true;
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this.$emit('close');
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});//œ
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// Attach listener for underlying custom modal "opened" event,
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// and when that happens, have Vue emit our own custom "opened" event.
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// This is so we know when the entry animation has completed, allows
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// us to do cool things like auto-focus the first input in a form modal.
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$(this.$el).on('shown.bs.modal', ()=>{
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// If this is mobile safari, let's get wacky.
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if(this.isMobileSafari) {
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// Scroll to the top of the page.
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window.scrollTo(0, 0);
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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// ^^FUTURE: Don't actually do this -- instead, try setting `top` of the
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// modal to whatever the original scrollTop of our window was. This
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// eliminates the need for auto-scrolling to the top and ripping you out
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// of the context you were in before the modal opens. It would also allow
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// us to keep the nice animation when opening/closing modals on iOS.
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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// Hide siblings to lop off any extra space at the bottom.
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this.$get().parent().children().not(this.$el).css({
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'display': 'none'
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});
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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// ^^FUTURE: Instead of just hiding siblings, which isn't perfect and won't
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// always work for everyone, try grabbing outerHeight of the modal element
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// and using that to set an explicit height for the body.
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// (but also be sure to handle the case where the body is short!)
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// But for now, this should work as long as we have sticky footer styles.
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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// Hard code some style overrides on our modal dialog.
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// Without these, it gets weird.
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$(this.$el).css({
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'overflow-y': 'auto!important',
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'position': 'absolute',
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'left': '0',
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'top': '0',
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});
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}//fi
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// Focus our "focus-first" field, if relevant.
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// (but not on mobile, because it can get weird)
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if(typeof bowser !== 'undefined' && !bowser.mobile && this.$find('[focus-first]').length > 0) {
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this.$focus('[focus-first]');
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}
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this.$emit('opened');
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$(this.$el).off('shown.bs.modal');
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});//ƒ
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},
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// ^Note that there is no `beforeDestroy()` lifecycle callback in this
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// component. This is on purpose, since the timing vs. `leave()` gets tricky.
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// ╦╔╗╔╔╦╗╔═╗╦═╗╔═╗╔═╗╔╦╗╦╔═╗╔╗╔╔═╗
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// ║║║║ ║ ║╣ ╠╦╝╠═╣║ ║ ║║ ║║║║╚═╗
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// ╩╝╚╝ ╩ ╚═╝╩╚═╩ ╩╚═╝ ╩ ╩╚═╝╝╚╝╚═╝
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methods: {
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leave: function (el, done) {
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// > Note: This function signature comes from Vue.js's transition system.
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// > It will likely be replaced with `async function (el){…}` in a future
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// > release of Vue/Sails.js (i.e. no callback argument).
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// If this shutting down was spawned by the bootstrap modal's built-in logic,
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// then we'll have already begun animating the modal shut. So we check our
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// spinlock to make sure. If it turns out that we HAVEN'T started that process
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// yet, then we go ahead and start it now.
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if (!this._bsModalIsAnimatingOut) {
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$(this.$el).modal('hide');
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}//fi
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// When the bootstrap modal finishes animating into nothingness, unbind all
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// the DOM events used by bootstrap, and then call `done()`, which passes
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// control back to Vue and lets it finish the job (i.e. afterLeave).
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//
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// > Note that the other lifecycle events like `destroyed` were actually
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// > already fired at this point.
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// >
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// > Also note that, since we're potentially long past the `destroyed` point
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// > of the lifecycle here, we can't call `.$emit()` anymore either. So,
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// > for example, we wouldn't be able to emit a "fullyClosed" event --
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// > because by the time it'd be appropriate to emit the Vue event, our
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// > context for triggering it (i.e. the relevant instance of this component)
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// > will no longer be capable of emitting custom Vue events (because by then,
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// > it is no longer "reactive").
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// >
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// > For more info, see:
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// > https://github.com/vuejs/vue-router/issues/1302#issuecomment-291207073
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$(this.$el).on('hidden.bs.modal', ()=>{
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$(this.$el).off('hide.bs.modal');
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$(this.$el).off('hidden.bs.modal');
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$(this.$el).off('shown.bs.modal');
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done();
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});//_∏_
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},
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}
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});
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