diff options
| -rw-r--r-- | fatcat_scholar/static/dialog-polyfill.css | 37 | ||||
| -rw-r--r-- | fatcat_scholar/static/dialog-polyfill.js | 866 | ||||
| -rw-r--r-- | fatcat_scholar/templates/base.html | 14 |
3 files changed, 916 insertions, 1 deletions
diff --git a/fatcat_scholar/static/dialog-polyfill.css b/fatcat_scholar/static/dialog-polyfill.css new file mode 100644 index 0000000..6b38bf0 --- /dev/null +++ b/fatcat_scholar/static/dialog-polyfill.css @@ -0,0 +1,37 @@ +dialog { + position: absolute; + left: 0; right: 0; + width: -moz-fit-content; + width: -webkit-fit-content; + width: fit-content; + height: -moz-fit-content; + height: -webkit-fit-content; + height: fit-content; + margin: auto; + border: solid; + padding: 1em; + background: white; + color: black; + display: block; +} + +dialog:not([open]) { + display: none; +} + +dialog + .backdrop { + position: fixed; + top: 0; right: 0; bottom: 0; left: 0; + background: rgba(0,0,0,0.1); +} + +._dialog_overlay { + position: fixed; + top: 0; right: 0; bottom: 0; left: 0; +} + +dialog.fixed { + position: fixed; + top: 50%; + transform: translate(0, -50%); +}
\ No newline at end of file diff --git a/fatcat_scholar/static/dialog-polyfill.js b/fatcat_scholar/static/dialog-polyfill.js new file mode 100644 index 0000000..aee7d96 --- /dev/null +++ b/fatcat_scholar/static/dialog-polyfill.js @@ -0,0 +1,866 @@ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : + typeof define === 'function' && define.amd ? define(factory) : + (global = global || self, global.dialogPolyfill = factory()); +}(this, function () { 'use strict'; + + // nb. This is for IE10 and lower _only_. + var supportCustomEvent = window.CustomEvent; + if (!supportCustomEvent || typeof supportCustomEvent === 'object') { + supportCustomEvent = function CustomEvent(event, x) { + x = x || {}; + var ev = document.createEvent('CustomEvent'); + ev.initCustomEvent(event, !!x.bubbles, !!x.cancelable, x.detail || null); + return ev; + }; + supportCustomEvent.prototype = window.Event.prototype; + } + + /** + * Dispatches the passed event to both an "on<type>" handler as well as via the + * normal dispatch operation. Does not bubble. + * + * @param {!EventTarget} target + * @param {!Event} event + * @return {boolean} + */ + function safeDispatchEvent(target, event) { + var check = 'on' + event.type.toLowerCase(); + if (typeof target[check] === 'function') { + target[check](event); + } + return target.dispatchEvent(event); + } + + /** + * @param {Element} el to check for stacking context + * @return {boolean} whether this el or its parents creates a stacking context + */ + function createsStackingContext(el) { + while (el && el !== document.body) { + var s = window.getComputedStyle(el); + var invalid = function(k, ok) { + return !(s[k] === undefined || s[k] === ok); + }; + + if (s.opacity < 1 || + invalid('zIndex', 'auto') || + invalid('transform', 'none') || + invalid('mixBlendMode', 'normal') || + invalid('filter', 'none') || + invalid('perspective', 'none') || + s['isolation'] === 'isolate' || + s.position === 'fixed' || + s.webkitOverflowScrolling === 'touch') { + return true; + } + el = el.parentElement; + } + return false; + } + + /** + * Finds the nearest <dialog> from the passed element. + * + * @param {Element} el to search from + * @return {HTMLDialogElement} dialog found + */ + function findNearestDialog(el) { + while (el) { + if (el.localName === 'dialog') { + return /** @type {HTMLDialogElement} */ (el); + } + if (el.parentElement) { + el = el.parentElement; + } else if (el.parentNode) { + el = el.parentNode.host; + } else { + el = null; + } + } + return null; + } + + /** + * Blur the specified element, as long as it's not the HTML body element. + * This works around an IE9/10 bug - blurring the body causes Windows to + * blur the whole application. + * + * @param {Element} el to blur + */ + function safeBlur(el) { + // Find the actual focused element when the active element is inside a shadow root + while (el && el.shadowRoot && el.shadowRoot.activeElement) { + el = el.shadowRoot.activeElement; + } + + if (el && el.blur && el !== document.body) { + el.blur(); + } + } + + /** + * @param {!NodeList} nodeList to search + * @param {Node} node to find + * @return {boolean} whether node is inside nodeList + */ + function inNodeList(nodeList, node) { + for (var i = 0; i < nodeList.length; ++i) { + if (nodeList[i] === node) { + return true; + } + } + return false; + } + + /** + * @param {HTMLFormElement} el to check + * @return {boolean} whether this form has method="dialog" + */ + function isFormMethodDialog(el) { + if (!el || !el.hasAttribute('method')) { + return false; + } + return el.getAttribute('method').toLowerCase() === 'dialog'; + } + + /** + * @param {!DocumentFragment|!Element} hostElement + * @return {?Element} + */ + function findFocusableElementWithin(hostElement) { + // Note that this is 'any focusable area'. This list is probably not exhaustive, but the + // alternative involves stepping through and trying to focus everything. + var opts = ['button', 'input', 'keygen', 'select', 'textarea']; + var query = opts.map(function(el) { + return el + ':not([disabled])'; + }); + // TODO(samthor): tabindex values that are not numeric are not focusable. + query.push('[tabindex]:not([disabled]):not([tabindex=""])'); // tabindex != "", not disabled + var target = hostElement.querySelector(query.join(', ')); + + if (!target && 'attachShadow' in Element.prototype) { + // If we haven't found a focusable target, see if the host element contains an element + // which has a shadowRoot. + // Recursively search for the first focusable item in shadow roots. + var elems = hostElement.querySelectorAll('*'); + for (var i = 0; i < elems.length; i++) { + if (elems[i].tagName && elems[i].shadowRoot) { + target = findFocusableElementWithin(elems[i].shadowRoot); + if (target) { + break; + } + } + } + } + return target; + } + + /** + * Determines if an element is attached to the DOM. + * @param {Element} element to check + * @return {boolean} whether the element is in DOM + */ + function isConnected(element) { + return element.isConnected || document.body.contains(element); + } + + /** + * @param {!Event} event + * @return {?Element} + */ + function findFormSubmitter(event) { + if (event.submitter) { + return event.submitter; + } + + var form = event.target; + if (!(form instanceof HTMLFormElement)) { + return null; + } + + var submitter = dialogPolyfill.formSubmitter; + if (!submitter) { + var target = event.target; + var root = ('getRootNode' in target && target.getRootNode() || document); + submitter = root.activeElement; + } + + if (!submitter || submitter.form !== form) { + return null; + } + return submitter; + } + + /** + * @param {!Event} event + */ + function maybeHandleSubmit(event) { + if (event.defaultPrevented) { + return; + } + var form = /** @type {!HTMLFormElement} */ (event.target); + + // We'd have a value if we clicked on an imagemap. + var value = dialogPolyfill.imagemapUseValue; + var submitter = findFormSubmitter(event); + if (value === null && submitter) { + value = submitter.value; + } + + // There should always be a dialog as this handler is added specifically on them, but check just + // in case. + var dialog = findNearestDialog(form); + if (!dialog) { + return; + } + + // Prefer formmethod on the button. + var formmethod = submitter && submitter.getAttribute('formmethod') || form.getAttribute('method'); + if (formmethod !== 'dialog') { + return; + } + event.preventDefault(); + + if (value != null) { + // nb. we explicitly check against null/undefined + dialog.close(value); + } else { + dialog.close(); + } + } + + /** + * @param {!HTMLDialogElement} dialog to upgrade + * @constructor + */ + function dialogPolyfillInfo(dialog) { + this.dialog_ = dialog; + this.replacedStyleTop_ = false; + this.openAsModal_ = false; + + // Set a11y role. Browsers that support dialog implicitly know this already. + if (!dialog.hasAttribute('role')) { + dialog.setAttribute('role', 'dialog'); + } + + dialog.show = this.show.bind(this); + dialog.showModal = this.showModal.bind(this); + dialog.close = this.close.bind(this); + + dialog.addEventListener('submit', maybeHandleSubmit, false); + + if (!('returnValue' in dialog)) { + dialog.returnValue = ''; + } + + if ('MutationObserver' in window) { + var mo = new MutationObserver(this.maybeHideModal.bind(this)); + mo.observe(dialog, {attributes: true, attributeFilter: ['open']}); + } else { + // IE10 and below support. Note that DOMNodeRemoved etc fire _before_ removal. They also + // seem to fire even if the element was removed as part of a parent removal. Use the removed + // events to force downgrade (useful if removed/immediately added). + var removed = false; + var cb = function() { + removed ? this.downgradeModal() : this.maybeHideModal(); + removed = false; + }.bind(this); + var timeout; + var delayModel = function(ev) { + if (ev.target !== dialog) { return; } // not for a child element + var cand = 'DOMNodeRemoved'; + removed |= (ev.type.substr(0, cand.length) === cand); + window.clearTimeout(timeout); + timeout = window.setTimeout(cb, 0); + }; + ['DOMAttrModified', 'DOMNodeRemoved', 'DOMNodeRemovedFromDocument'].forEach(function(name) { + dialog.addEventListener(name, delayModel); + }); + } + // Note that the DOM is observed inside DialogManager while any dialog + // is being displayed as a modal, to catch modal removal from the DOM. + + Object.defineProperty(dialog, 'open', { + set: this.setOpen.bind(this), + get: dialog.hasAttribute.bind(dialog, 'open') + }); + + this.backdrop_ = document.createElement('div'); + this.backdrop_.className = 'backdrop'; + this.backdrop_.addEventListener('mouseup' , this.backdropMouseEvent_.bind(this)); + this.backdrop_.addEventListener('mousedown', this.backdropMouseEvent_.bind(this)); + this.backdrop_.addEventListener('click' , this.backdropMouseEvent_.bind(this)); + } + + dialogPolyfillInfo.prototype = /** @type {HTMLDialogElement.prototype} */ ({ + + get dialog() { + return this.dialog_; + }, + + /** + * Maybe remove this dialog from the modal top layer. This is called when + * a modal dialog may no longer be tenable, e.g., when the dialog is no + * longer open or is no longer part of the DOM. + */ + maybeHideModal: function() { + if (this.dialog_.hasAttribute('open') && isConnected(this.dialog_)) { return; } + this.downgradeModal(); + }, + + /** + * Remove this dialog from the modal top layer, leaving it as a non-modal. + */ + downgradeModal: function() { + if (!this.openAsModal_) { return; } + this.openAsModal_ = false; + this.dialog_.style.zIndex = ''; + + // This won't match the native <dialog> exactly because if the user set top on a centered + // polyfill dialog, that top gets thrown away when the dialog is closed. Not sure it's + // possible to polyfill this perfectly. + if (this.replacedStyleTop_) { + this.dialog_.style.top = ''; + this.replacedStyleTop_ = false; + } + + // Clear the backdrop and remove from the manager. + this.backdrop_.parentNode && this.backdrop_.parentNode.removeChild(this.backdrop_); + dialogPolyfill.dm.removeDialog(this); + }, + + /** + * @param {boolean} value whether to open or close this dialog + */ + setOpen: function(value) { + if (value) { + this.dialog_.hasAttribute('open') || this.dialog_.setAttribute('open', ''); + } else { + this.dialog_.removeAttribute('open'); + this.maybeHideModal(); // nb. redundant with MutationObserver + } + }, + + /** + * Handles mouse events ('mouseup', 'mousedown', 'click') on the fake .backdrop element, redirecting them as if + * they were on the dialog itself. + * + * @param {!Event} e to redirect + */ + backdropMouseEvent_: function(e) { + if (!this.dialog_.hasAttribute('tabindex')) { + // Clicking on the backdrop should move the implicit cursor, even if dialog cannot be + // focused. Create a fake thing to focus on. If the backdrop was _before_ the dialog, this + // would not be needed - clicks would move the implicit cursor there. + var fake = document.createElement('div'); + this.dialog_.insertBefore(fake, this.dialog_.firstChild); + fake.tabIndex = -1; + fake.focus(); + this.dialog_.removeChild(fake); + } else { + this.dialog_.focus(); + } + + var redirectedEvent = document.createEvent('MouseEvents'); + redirectedEvent.initMouseEvent(e.type, e.bubbles, e.cancelable, window, + e.detail, e.screenX, e.screenY, e.clientX, e.clientY, e.ctrlKey, + e.altKey, e.shiftKey, e.metaKey, e.button, e.relatedTarget); + this.dialog_.dispatchEvent(redirectedEvent); + e.stopPropagation(); + }, + + /** + * Focuses on the first focusable element within the dialog. This will always blur the current + * focus, even if nothing within the dialog is found. + */ + focus_: function() { + // Find element with `autofocus` attribute, or fall back to the first form/tabindex control. + var target = this.dialog_.querySelector('[autofocus]:not([disabled])'); + if (!target && this.dialog_.tabIndex >= 0) { + target = this.dialog_; + } + if (!target) { + target = findFocusableElementWithin(this.dialog_); + } + safeBlur(document.activeElement); + target && target.focus(); + }, + + /** + * Sets the zIndex for the backdrop and dialog. + * + * @param {number} dialogZ + * @param {number} backdropZ + */ + updateZIndex: function(dialogZ, backdropZ) { + if (dialogZ < backdropZ) { + throw new Error('dialogZ should never be < backdropZ'); + } + this.dialog_.style.zIndex = dialogZ; + this.backdrop_.style.zIndex = backdropZ; + }, + + /** + * Shows the dialog. If the dialog is already open, this does nothing. + */ + show: function() { + if (!this.dialog_.open) { + this.setOpen(true); + this.focus_(); + } + }, + + /** + * Show this dialog modally. + */ + showModal: function() { + if (this.dialog_.hasAttribute('open')) { + throw new Error('Failed to execute \'showModal\' on dialog: The element is already open, and therefore cannot be opened modally.'); + } + if (!isConnected(this.dialog_)) { + throw new Error('Failed to execute \'showModal\' on dialog: The element is not in a Document.'); + } + if (!dialogPolyfill.dm.pushDialog(this)) { + throw new Error('Failed to execute \'showModal\' on dialog: There are too many open modal dialogs.'); + } + + if (createsStackingContext(this.dialog_.parentElement)) { + console.warn('A dialog is being shown inside a stacking context. ' + + 'This may cause it to be unusable. For more information, see this link: ' + + 'https://github.com/GoogleChrome/dialog-polyfill/#stacking-context'); + } + + this.setOpen(true); + this.openAsModal_ = true; + + // Optionally center vertically, relative to the current viewport. + if (dialogPolyfill.needsCentering(this.dialog_)) { + dialogPolyfill.reposition(this.dialog_); + this.replacedStyleTop_ = true; + } else { + this.replacedStyleTop_ = false; + } + + // Insert backdrop. + this.dialog_.parentNode.insertBefore(this.backdrop_, this.dialog_.nextSibling); + + // Focus on whatever inside the dialog. + this.focus_(); + }, + + /** + * Closes this HTMLDialogElement. This is optional vs clearing the open + * attribute, however this fires a 'close' event. + * + * @param {string=} opt_returnValue to use as the returnValue + */ + close: function(opt_returnValue) { + if (!this.dialog_.hasAttribute('open')) { + throw new Error('Failed to execute \'close\' on dialog: The element does not have an \'open\' attribute, and therefore cannot be closed.'); + } + this.setOpen(false); + + // Leave returnValue untouched in case it was set directly on the element + if (opt_returnValue !== undefined) { + this.dialog_.returnValue = opt_returnValue; + } + + // Triggering "close" event for any attached listeners on the <dialog>. + var closeEvent = new supportCustomEvent('close', { + bubbles: false, + cancelable: false + }); + safeDispatchEvent(this.dialog_, closeEvent); + } + + }); + + var dialogPolyfill = {}; + + dialogPolyfill.reposition = function(element) { + var scrollTop = document.body.scrollTop || document.documentElement.scrollTop; + var topValue = scrollTop + (window.innerHeight - element.offsetHeight) / 2; + element.style.top = Math.max(scrollTop, topValue) + 'px'; + }; + + dialogPolyfill.isInlinePositionSetByStylesheet = function(element) { + for (var i = 0; i < document.styleSheets.length; ++i) { + var styleSheet = document.styleSheets[i]; + var cssRules = null; + // Some browsers throw on cssRules. + try { + cssRules = styleSheet.cssRules; + } catch (e) {} + if (!cssRules) { continue; } + for (var j = 0; j < cssRules.length; ++j) { + var rule = cssRules[j]; + var selectedNodes = null; + // Ignore errors on invalid selector texts. + try { + selectedNodes = document.querySelectorAll(rule.selectorText); + } catch(e) {} + if (!selectedNodes || !inNodeList(selectedNodes, element)) { + continue; + } + var cssTop = rule.style.getPropertyValue('top'); + var cssBottom = rule.style.getPropertyValue('bottom'); + if ((cssTop && cssTop !== 'auto') || (cssBottom && cssBottom !== 'auto')) { + return true; + } + } + } + return false; + }; + + dialogPolyfill.needsCentering = function(dialog) { + var computedStyle = window.getComputedStyle(dialog); + if (computedStyle.position !== 'absolute') { + return false; + } + + // We must determine whether the top/bottom specified value is non-auto. In + // WebKit/Blink, checking computedStyle.top == 'auto' is sufficient, but + // Firefox returns the used value. So we do this crazy thing instead: check + // the inline style and then go through CSS rules. + if ((dialog.style.top !== 'auto' && dialog.style.top !== '') || + (dialog.style.bottom !== 'auto' && dialog.style.bottom !== '')) { + return false; + } + return !dialogPolyfill.isInlinePositionSetByStylesheet(dialog); + }; + + /** + * @param {!Element} element to force upgrade + */ + dialogPolyfill.forceRegisterDialog = function(element) { + if (window.HTMLDialogElement || element.showModal) { + console.warn('This browser already supports <dialog>, the polyfill ' + + 'may not work correctly', element); + } + if (element.localName !== 'dialog') { + throw new Error('Failed to register dialog: The element is not a dialog.'); + } + new dialogPolyfillInfo(/** @type {!HTMLDialogElement} */ (element)); + }; + + /** + * @param {!Element} element to upgrade, if necessary + */ + dialogPolyfill.registerDialog = function(element) { + if (!element.showModal) { + dialogPolyfill.forceRegisterDialog(element); + } + }; + + /** + * @constructor + */ + dialogPolyfill.DialogManager = function() { + /** @type {!Array<!dialogPolyfillInfo>} */ + this.pendingDialogStack = []; + + var checkDOM = this.checkDOM_.bind(this); + + // The overlay is used to simulate how a modal dialog blocks the document. + // The blocking dialog is positioned on top of the overlay, and the rest of + // the dialogs on the pending dialog stack are positioned below it. In the + // actual implementation, the modal dialog stacking is controlled by the + // top layer, where z-index has no effect. + this.overlay = document.createElement('div'); + this.overlay.className = '_dialog_overlay'; + this.overlay.addEventListener('click', function(e) { + this.forwardTab_ = undefined; + e.stopPropagation(); + checkDOM([]); // sanity-check DOM + }.bind(this)); + + this.handleKey_ = this.handleKey_.bind(this); + this.handleFocus_ = this.handleFocus_.bind(this); + + this.zIndexLow_ = 100000; + this.zIndexHigh_ = 100000 + 150; + + this.forwardTab_ = undefined; + + if ('MutationObserver' in window) { + this.mo_ = new MutationObserver(function(records) { + var removed = []; + records.forEach(function(rec) { + for (var i = 0, c; c = rec.removedNodes[i]; ++i) { + if (!(c instanceof Element)) { + continue; + } else if (c.localName === 'dialog') { + removed.push(c); + } + removed = removed.concat(c.querySelectorAll('dialog')); + } + }); + removed.length && checkDOM(removed); + }); + } + }; + + /** + * Called on the first modal dialog being shown. Adds the overlay and related + * handlers. + */ + dialogPolyfill.DialogManager.prototype.blockDocument = function() { + document.documentElement.addEventListener('focus', this.handleFocus_, true); + document.addEventListener('keydown', this.handleKey_); + this.mo_ && this.mo_.observe(document, {childList: true, subtree: true}); + }; + + /** + * Called on the first modal dialog being removed, i.e., when no more modal + * dialogs are visible. + */ + dialogPolyfill.DialogManager.prototype.unblockDocument = function() { + document.documentElement.removeEventListener('focus', this.handleFocus_, true); + document.removeEventListener('keydown', this.handleKey_); + this.mo_ && this.mo_.disconnect(); + }; + + /** + * Updates the stacking of all known dialogs. + */ + dialogPolyfill.DialogManager.prototype.updateStacking = function() { + var zIndex = this.zIndexHigh_; + + for (var i = 0, dpi; dpi = this.pendingDialogStack[i]; ++i) { + dpi.updateZIndex(--zIndex, --zIndex); + if (i === 0) { + this.overlay.style.zIndex = --zIndex; + } + } + + // Make the overlay a sibling of the dialog itself. + var last = this.pendingDialogStack[0]; + if (last) { + var p = last.dialog.parentNode || document.body; + p.appendChild(this.overlay); + } else if (this.overlay.parentNode) { + this.overlay.parentNode.removeChild(this.overlay); + } + }; + + /** + * @param {Element} candidate to check if contained or is the top-most modal dialog + * @return {boolean} whether candidate is contained in top dialog + */ + dialogPolyfill.DialogManager.prototype.containedByTopDialog_ = function(candidate) { + while (candidate = findNearestDialog(candidate)) { + for (var i = 0, dpi; dpi = this.pendingDialogStack[i]; ++i) { + if (dpi.dialog === candidate) { + return i === 0; // only valid if top-most + } + } + candidate = candidate.parentElement; + } + return false; + }; + + dialogPolyfill.DialogManager.prototype.handleFocus_ = function(event) { + var target = event.composedPath ? event.composedPath()[0] : event.target; + + if (this.containedByTopDialog_(target)) { return; } + + if (document.activeElement === document.documentElement) { return; } + + event.preventDefault(); + event.stopPropagation(); + safeBlur(/** @type {Element} */ (target)); + + if (this.forwardTab_ === undefined) { return; } // move focus only from a tab key + + var dpi = this.pendingDialogStack[0]; + var dialog = dpi.dialog; + var position = dialog.compareDocumentPosition(target); + if (position & Node.DOCUMENT_POSITION_PRECEDING) { + if (this.forwardTab_) { + // forward + dpi.focus_(); + } else if (target !== document.documentElement) { + // backwards if we're not already focused on <html> + document.documentElement.focus(); + } + } + + return false; + }; + + dialogPolyfill.DialogManager.prototype.handleKey_ = function(event) { + this.forwardTab_ = undefined; + if (event.keyCode === 27) { + event.preventDefault(); + event.stopPropagation(); + var cancelEvent = new supportCustomEvent('cancel', { + bubbles: false, + cancelable: true + }); + var dpi = this.pendingDialogStack[0]; + if (dpi && safeDispatchEvent(dpi.dialog, cancelEvent)) { + dpi.dialog.close(); + } + } else if (event.keyCode === 9) { + this.forwardTab_ = !event.shiftKey; + } + }; + + /** + * Finds and downgrades any known modal dialogs that are no longer displayed. Dialogs that are + * removed and immediately readded don't stay modal, they become normal. + * + * @param {!Array<!HTMLDialogElement>} removed that have definitely been removed + */ + dialogPolyfill.DialogManager.prototype.checkDOM_ = function(removed) { + // This operates on a clone because it may cause it to change. Each change also calls + // updateStacking, which only actually needs to happen once. But who removes many modal dialogs + // at a time?! + var clone = this.pendingDialogStack.slice(); + clone.forEach(function(dpi) { + if (removed.indexOf(dpi.dialog) !== -1) { + dpi.downgradeModal(); + } else { + dpi.maybeHideModal(); + } + }); + }; + + /** + * @param {!dialogPolyfillInfo} dpi + * @return {boolean} whether the dialog was allowed + */ + dialogPolyfill.DialogManager.prototype.pushDialog = function(dpi) { + var allowed = (this.zIndexHigh_ - this.zIndexLow_) / 2 - 1; + if (this.pendingDialogStack.length >= allowed) { + return false; + } + if (this.pendingDialogStack.unshift(dpi) === 1) { + this.blockDocument(); + } + this.updateStacking(); + return true; + }; + + /** + * @param {!dialogPolyfillInfo} dpi + */ + dialogPolyfill.DialogManager.prototype.removeDialog = function(dpi) { + var index = this.pendingDialogStack.indexOf(dpi); + if (index === -1) { return; } + + this.pendingDialogStack.splice(index, 1); + if (this.pendingDialogStack.length === 0) { + this.unblockDocument(); + } + this.updateStacking(); + }; + + dialogPolyfill.dm = new dialogPolyfill.DialogManager(); + dialogPolyfill.formSubmitter = null; + dialogPolyfill.imagemapUseValue = null; + + /** + * Installs global handlers, such as click listers and native method overrides. These are needed + * even if a no dialog is registered, as they deal with <form method="dialog">. + */ + if (window.HTMLDialogElement === undefined) { + + /** + * If HTMLFormElement translates method="DIALOG" into 'get', then replace the descriptor with + * one that returns the correct value. + */ + var testForm = document.createElement('form'); + testForm.setAttribute('method', 'dialog'); + if (testForm.method !== 'dialog') { + var methodDescriptor = Object.getOwnPropertyDescriptor(HTMLFormElement.prototype, 'method'); + if (methodDescriptor) { + // nb. Some older iOS and older PhantomJS fail to return the descriptor. Don't do anything + // and don't bother to update the element. + var realGet = methodDescriptor.get; + methodDescriptor.get = function() { + if (isFormMethodDialog(this)) { + return 'dialog'; + } + return realGet.call(this); + }; + var realSet = methodDescriptor.set; + /** @this {HTMLElement} */ + methodDescriptor.set = function(v) { + if (typeof v === 'string' && v.toLowerCase() === 'dialog') { + return this.setAttribute('method', v); + } + return realSet.call(this, v); + }; + Object.defineProperty(HTMLFormElement.prototype, 'method', methodDescriptor); + } + } + + /** + * Global 'click' handler, to capture the <input type="submit"> or <button> element which has + * submitted a <form method="dialog">. Needed as Safari and others don't report this inside + * document.activeElement. + */ + document.addEventListener('click', function(ev) { + dialogPolyfill.formSubmitter = null; + dialogPolyfill.imagemapUseValue = null; + if (ev.defaultPrevented) { return; } // e.g. a submit which prevents default submission + + var target = /** @type {Element} */ (ev.target); + if ('composedPath' in ev) { + var path = ev.composedPath(); + target = path.shift() || target; + } + if (!target || !isFormMethodDialog(target.form)) { return; } + + var valid = (target.type === 'submit' && ['button', 'input'].indexOf(target.localName) > -1); + if (!valid) { + if (!(target.localName === 'input' && target.type === 'image')) { return; } + // this is a <input type="image">, which can submit forms + dialogPolyfill.imagemapUseValue = ev.offsetX + ',' + ev.offsetY; + } + + var dialog = findNearestDialog(target); + if (!dialog) { return; } + + dialogPolyfill.formSubmitter = target; + + }, false); + + /** + * Global 'submit' handler. This handles submits of `method="dialog"` which are invalid, i.e., + * outside a dialog. They get prevented. + */ + document.addEventListener('submit', function(ev) { + var form = ev.target; + var dialog = findNearestDialog(form); + if (dialog) { + return; // ignore, handle there + } + + var submitter = findFormSubmitter(ev); + var formmethod = submitter && submitter.getAttribute('formmethod') || form.getAttribute('method'); + if (formmethod === 'dialog') { + ev.preventDefault(); + } + }); + + /** + * Replace the native HTMLFormElement.submit() method, as it won't fire the + * submit event and give us a chance to respond. + */ + var nativeFormSubmit = HTMLFormElement.prototype.submit; + var replacementFormSubmit = function () { + if (!isFormMethodDialog(this)) { + return nativeFormSubmit.call(this); + } + var dialog = findNearestDialog(this); + dialog && dialog.close(); + }; + HTMLFormElement.prototype.submit = replacementFormSubmit; + } + + return dialogPolyfill; + +})); diff --git a/fatcat_scholar/templates/base.html b/fatcat_scholar/templates/base.html index 6af387d..a0af582 100644 --- a/fatcat_scholar/templates/base.html +++ b/fatcat_scholar/templates/base.html @@ -389,10 +389,22 @@ </footer> <script> -// when search is submitted, have submit button animate +/* when search is submitted, have submit button animate */ document.getElementById("search_form").onsubmit = function(){ document.getElementById("search_submit_button").classList.add("loading"); }; + +/* conditionally load polyfill for <dialog> */ +if (!(typeof HTMLDialogElement === 'function')) { + var js = document.createElement('script'); + js.src = "/static/dialog-polyfill.js"; + document.head.appendChild(js); + var link = document.createElement('link'); + link.rel = "stylesheet" + link.type = "text/css" + link.href= "/static/dialog-polyfill.css"; + document.head.appendChild(link); +}; </script> {% if settings.ENABLE_GOATCOUNTER -%} {# for local testing: <script>window.goatcounter = {allow_local: true};</script> #} |